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27883 PE-1750 SHELLEY LAKE I ~ , Co ~ Nry DRAFT ENVIRONMENTAL IMPACT STATEMENT SHELLEY LAKE LEAD AGENCY: SPOKANE COUNTY PLANNING DEPARTMENT PREPARED IN COMPLIANCE WITH: - WASHINGTON STATE ENVIRONMENTAL POLICY ACT OF 1971, CHAPTER 43.21 C REVISED CODE OF WASHINGTON - REVISED SEPA GUIDELINES, EFFECTIVE APRIL 4, 1984, CHAPTER 197-11, WASHINGTON ADMINISTRATIVE CODE - SPOKANE ENVIRONMENTAL ORDINANCE, EFFECTIVE OCTOBER 1, 1984 PREPARED BY: RAMM ASSOCIATES, INC. SOUTH 104 FREYA LILAC FLAG BUILDING, SUITE 217 SPOKANE, WASHINGTON 99202 ~ OCTOBER 1993 ~ ~ . FACT SHEET ~ Title: Shelley Lake Preliminary PUD Plat ~ Brief Description: A preliminary plat with a planned unit development totaling 460 new residences is ~ proposed on 123.8 acres surrounding Shelley Lake in the Spokane Valley. The site is currently zoned UR-3.5, with approximately 20 acres zoned SR-1. The proposed action-includes rezoning approximately 14.0 acres to UR-12 with bonus density. The ~ majority of the site is in the Urban land use category of the County's Comprehensive Land Use Plan, with the southern 20 acres in the Suburban( + ) category. The overall site density proposed is 3.7 units per acre. ~ The rezone to UR-12 on the west side of the site would allow the development of 196 multi-family units. Single-family residential lots include 68 manufactured homes, 158 ~ conventional homes on small lots around Shelley Lake, and 38 large lots on the site's southern 20 acres. The proposal alsoincludes 36.9 acres of open space consisting of the lake, shoreline, wetlands, and steep slopes. These areas will be preserved for ~ common use of the residents and associated vegetative habitats will be enhanced to increase their value for wildlife. oNG ~,ocPrt'v R'r TNe oTMGy` , The internal road system proposed rR omb ination of public and private aved roads, with two primary access points chford Drive on the south and 4th Avenue/ ~ Conklin Road on the north. A storm water management plan will be prepared to address retention of storm water via swales, drywells, and retention ponds. Vera Water and Power will provide the project with electricity and water. Spokane County ~ sewer lines will be extended into the site by the applicant. Natural gas will be provided by Washington Water Power. Detailed engineering plans will be required for construction which must meet local and state standards. Approval and ~ implementation of the proposed action will permanently alter the site through the development of roads and homes. ' Open space areas will include a soft pedestrian trail surrounding the lake, a swimming beach, picnic areas, and a community center. These areas will be maintained by the elly ake Homeowner's Association. ~ Alternatives Include: Proposed Alternative Development Under Existing Zoning ' No-Action Alternative Proponent: N & H Investments ~ c/o Buster Heitman Tentative Implementation Date: Commencing Spring 1994 ~ . Shel%y Leke E/S i October 1993 1 Lead Agency: Spokane County Planning Oepartment W. 1026 Broadway Spokane, Washington 99260 - 509/456-2205 Responsible Official: Wallis D. Hubbard, Planning Director Contact Person: Tim Lawhead Required Permits and Licenses: • Rezone and PUD approval and compliance with RCW 58.17/Spokane County Planning Department • New street and drainage systems/Spokane County Engineers Department • Sewer and water utility systems/Spokane County Utilities Department • Building permits/Spokane County Building Codes Department Authors and Major Contributors to the Draft E.I.S.: Draft E.I.S. Document: Ramm Associates, Inc. Supporting Studies and Information: Inland Pacific Engineering Company, Inc. Department of Anthropology, WSU ~ D.E.I.S. Date of Issuance November 1, 1993 Comment Due Date: ovember 30, 1993 Time and Place of Public Hearings or Meetings: Te ' ly scheduled for ecember ~ 993 Type and Timing of Subsequent Environmental Review Committed to by Lead Agency or Other Agencies: None anticipated Location of Prior E.I.S. or Information on this Proposal: Ramm Associates, Inc. South 104 Freya Lilac Flag Building, Suite 217 Spokane, Washington 99202 Coples of the D.E.I.S. may be obtained from the Spokane County Planning Department. The D.E.I.S. is also available for review at the Spokane Public Library. Cost to the Public Per D.E.I.S.: Shel%y Lake E/S II October 1993 I I TABLE tiF G(]N7ENT5 Pgge.~. Cvver Letter fram Lead Agency FactSheet .................................................i ~ Ta'bCe of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Li5t of Figures and Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v List vf Elements nf the Environment IWAC 197-1 1-4"y . . . . . . . . . . . . . . . . vi Prvject Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Proposed Actinn and Alternatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1. ProposedActivn _ Il. Reasona6le Alternatives - ~ 1.0 Develvpment Under Existing Zoning . . . . . . . . . . . . . . . . . 17 - 2.0 Na-Action Alternatiue . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Af#ected En►riranment, Signi#icant Ianpacts, and Mitigating Measures i~ f. Natural Enuiranmen t 1.0 Vtlater ....................,...,.,..........21 1.1 Surface Water Q.uantitylQuality . . , . . . . . . . . . . 21 7.2 Run-offlAbsorption . . . . . . . . . . . . . . . . . . . . . . 28 1.3 FIQods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ~ 2.0 Plants and Animals . . . . . . . . . . . . . . . . . . . . . . . . . . 37 ' 2.1 Flabitat For and Nurnbed and Diversity ❑f ~ Spec3es vf Plants. Fish or ather W'ildlife 37 ~ IJ. Buift Environmenf 1.0 Land and Shoreline Use . . . . . . . . . . . . . . . . . . . . . . . 43 ~ 1.1 Relationship da ExFSting Land Use Plans . . . . . . . . . . 43 ~ 1.2 Cultural Resvurces . . . . . . . . . . . . . . . . . . . . . . . . 60 ~ 2.0 Transpartstivn ' 2.1 Transporta#ion SyStems . . . . . . . . . . . . . . . . . . . . . 64 2.2 1lehicular Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . 72 3.0 Public Senrices 3.1 Polica .................................82 3,2 5c'hools...,............................ 83 3.3 Parks and Recreation . . . . . . . . . . . . . . . . . . . . . . . 85 3.4 Fire Pratection . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 Shelley Ceke E15 iii October 1993 TABLE OF CQNTENTS GQNT. - pAge Na. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91 Distribudian List Appendices Appendix A Stvrm Drainage Commentary Inland Pacific Engineering Campany, Inc. Appendix 8 Flaod Hazard Letter 5pokane +Cvunty Engineers Appendix C Cultura! Resource $un►ey at the Shelley Lake Lgcality , . Repar#ment of Anihropalogy - WaShingtan State llniversity Appendix D Traffic Impact Analys'rs for the Propased 5helley Lake - - Residerttial Develapment. Inland Pacific Engineering Company, Inc. Shetley Leke E15 iv Qcta[ser 1993 ' . LIST OF F[GUFiES ~ fiWre Na. iwg p"e No. 7 Vicinity Maq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2 Area Map ............75 - ' 3 Prelimiraary RGO Piat and Site PIan of Shelley Lake . . 16 , 4 Existing Zoning Alternati►►e Map . . . . . . . . . . . . . . . 20 5 Lake Bottom Contours . . . . . . . . . . . . . . . . . . . . . . 34 6 Svils Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7 FEIVf►4 Flaad Hazard Map . . . . . . . . . . . . . . . . . . . . 36 ' 8 Existing Plant Cammunities . . . . . . . . . . . . . . . . . . 42 9 Camprehensive Plan Desigraatians . , . . . , . , . . . . 62 , 10 Zoning Classificatians . . . . . . . . . . . . . . . . . . . . 63 ~ 11 AM Peak Hour Traffic IJolumes . . . . . . . . . . . . . . 80 ' 12 PM Peak Hour Traffic Valume5 . . . . . . . . . . . . . . . . 81 yl I L15T flF TA6LES - ahle No. ii#Te F"e No. - - 1 Wa#er Quality Data . . . . . . . . . . . . . . . . . . . . . . . . 24 ~ 2 Sails enaracteristics . . . . . . . . . . . . . . . . . . . . . . . 30 J 1993 Peak Mour Ex'ssting Levels Qf 5ervice ........6F 5helley Leke EIS v October 1993 'LIST [3F ELEMENTS ❑F THE ENVIRONMENT. 1NAC 197-11444 Nate: Elerrzents marked with an * were identified during the SEPA scopxng pracess for inclus+on in this draft E.I.S. , [1] fVatural Enviconment (a) Earth tiy GeologY _ (7i) Sails (iii) Topography ~ fivf L1nique physical feadures ' (v) Ermsionleniargement of land area (accretion) (b) ►a►ir (i) Air Quality 00 ❑dor (iii) Climate * (c) Water 0) Surface water rnovementlquantitylquality * 00 Run-vfflabsorptian (iii) Flood's - 4ivy Graund vvater rnovement]quantitylqua'lity _ (►v) Public water supplies (d) Plants and, animals ~ W Hafaitat for and numbers vr dkVersity af species of plan#s, fish or ather wildlife ' (ii) Unique species (iii) Fish or wildlife migration routes - (e) Energy and natural resources tiy Amaunt rsquiredlrate vf useleff iciency - tiiy 5nurcelavailability (iii) Nanrenewshle resouress (iv) Gonseruatifln and renewable resaurces (v) 'Scenic resaurces - , (2) Built EnVironment , (a) Enrriranmental hea1th (i) Naise (ii) Risk of explasiorr - (iii) Releases ar potential releases to 1he environment affecting pubfic healtih, such as taxic or Mazardous materaals * tbI Land and shorefine use (i) Relationship tv exfsting land use plans and to estimated papulation iiil Huusing Shelley lake F15 vi Qctober 1993 , tiii) Light and glare (i►v) Aesthetics tr►y RecreatiDn - (ai) Hisdvric and cultural preservation (vii) AgriGUltural' craps (c) Transpvrtatian (i) Trarrspartation systems w 00 VehiGu1ar traffic - (iii) Waterbarne, raif and air traffic (iv) Parking _ (v) Movementlcirculatian of peo,ple or gonds (vi) Traffic hazards * idf Public serVices and utifities ~ (i) Fire (i0 Pvlice * (iii) 5chaols * (iV) Parks or 4ther recreational facilities (V) Maintenance (ui) Communications ~ (vii) Waterlstarm water , (rriii) Sewerlsolid waste ~ (ix) Other gvr►emmental services or utilities (3) To 5implify the E.I.S. format, reduce paperwork and duplicatiQn, improVe readability, and facus on the significaht issues, same or all vf the elements of #he environanent in 7 97-19 -444 may be cambinsd, ~ Shefley Lake EIS vii (3ctaber 1993 . y , ~ x ~n ~'L r E r ' _ " ' ' ~ • , _ • • - ' " • , ' y _ ~ . ~ 'y7 _ • s ' • ' ' i " • n • Y• . , r J~ ~ R.t . _ • _ 7 ~ • ' 'v _ ' • i1 ' ~ _ • . • ' • - ~ . ~ - Y ~ ~ . 4 ~ . . _ , , , ' ' r • y .i. , _ - • - - . _ ~ ' , . - t - . . - . _ ~ • , • - _ ti ' ` . , - • 4 r~~ ~~~~J`nY - . r. - - . . i ~ - ^ r " ' , . 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SI . . a' ~ 9 ~ , - _ . ~Y ' Y ~ r~yf i ~ . ~ v L' ~ . - ' . - ~ ~ • , . • ~ " • ~ ' - . f;' ~ i }5 ` - • ' , ` , . • _ ~ + . [ • . : . . " .S '.~A ~ .✓5.~. ' 1 rt . . r i - ' , .1 ~ lr~ ~ • - ` o- Fl_= - x~'~ ~•~rii ' - • . r, • • , ' . . . __•'S~:J¢;~~Yr+.~ • ~~-~t ~ ~ • - . . • . • ' ' ' - Ji f - < ~ - - • , ~ . . . ,r.~ ~C'v~ - - " _ ' ~~FS rt's~_„a~`'• - - ~ • - ~ ~ ' - " i _ ' - . . . - - ' ' ^ :1` ~;~N r. ~y~~L'~~~r.~Tr`~~-'r ~ - - ` r_ - ` ` ' ' ' - •3 ' N J,--•. Y _ • f 4 a ~Y - Y^ . . . '~+~re~'~~~~ ~S' ~ • l 'r ' .r~. ~ . ` - t ~L.it`x.~~',n.R~l''•L_• 'F' • • • . . ~ - ~ ,r • ~ ` - . s~Y i`_{ +'L~• I.r~ ~ '.R *r. s.~i , ~ x' ~ ' • ' _ . ~ . ~ , ~ `_~.w-v.? . '~'r , 3 ' r, , . . ~r.'.i' : ~~'a' ='r .k. ' . - ' ' - . 7 . _ , . - , PA'OJECT SUMMi4RY OBJECTIVES The propvnent proposes da rezone 14 acres af the 123,8 acre project site fram Ucban Residential-3.5 (UR-3.5) to fJrban Residential-1 2 4UR-12y. The remaining area wauld remain zoned U R-3,5 and Suburban Residential-1 (SR-1 A Paanned Gn'rt Developrnent (PUQ) averlay with bonus densityr is prvposed for the entire side, aflvwing development of 460 residential' dwelling units. A diVersity of housing types wauld be proUided wncluding 196 multi-family units. 68 manufactured' hames vn pratted Io#s, 7 58 canventavnal honves on small 1ots, and 38 Iarge Ivt single-family hvmes. The P4tlD propased would create a fairfy private residentiaf community encvmpassing a variety of parcel sizes and hflusing densities thraug'h the provisron of clustered lats. The PUO aVerlay will aIso proVide substanti as designated as vpen space. The _ prvject site cvntains sensitiae areas such as hell Lake and its asssaciated wetlands, areas af steep slopes, and wildlife hahitat. By u ~~zing a PUQ concept these areas can - be prvtected, enhanced, and managed tv contrvl and limrt further degradatian and , acduaffy impraVe existing conditivns. - The praposal's objectives are surrtimarized in the follawing statements: • Develop a planned residentia1 cammunity #hat is compa#ible with the - sur€ound€ng neighbvrhuvd. ~ Pravide subs#antial vpen spac+e areas to protect and enhance the scte's sen5itive features. Enhance the wildlife habitat areas associated with Shetley Lake and 5altese Creek ta prvrnote their angoing health and Viabi4iry. ~ Mininnize off-site impacts caused by project devela,pmeret and increased population an-site. • Prvuide a density transition between the multi-family units and smaller manufactured heme Ivts to the narth and the Iarger nearly vne a+cre lnts ta the south. + PRfl►►ide a variety of housing opportunities tv meet a grvwing market demand, OcLeTIE • Pravide paVed raads and through connections and minimize off-site road impacts. ~ Provide an aesChetically pleasing enufronment which will enhance the Shelley Ceke I Octvber 1993 _ adjacent neighbvrhovds. ■ Prvvide restricti►re cavenants and controls that assure quality cantrvl v# architectural considerativns, landscaping and rnaintenance, place restrictivrrs vn domestic pets and IiVestock keeping, and assure ultimate ~ prertectian of the envirorarnent. - _ • Pcovide a residentiaf carrbmunity wttere residents can live in clvse i praximity to the natural envirDnment, yet restrict their actiVities to respect the needs of wildlife sharing the site. ■ Minimiae cvnflicts with wildlife habitat whife providing project residents with on-site recreativnal appvrtunities. Prnmote awareness regarding the site's sensitive features by providing educational materials tv residents outlinirag efforts concerning prvtect+an and enhancement of these featvres. PR[]P[}SED ACTION The prnpased site is 723.8 acres of undeueloped land an 4efl Lake in the Spokane Val1ey, appraximately 1,300 feet east of Sullivan Road and approximatefy 600 feet - i; south of 5prague A►►enue. A PUD plat of 460 residential dwelling units is praposed with arezone of 14 ac res to UR-12. The majvrity of #he site wvuld remain zoned UR- 3.5 and 5R-1. Bonus density is ap,plied ta the UR-12 and SR-1 zanes. The site as irr ~ the Urban arsd Suhurban(+) categories of the County's Comprehensive Land Use Plan. ' The Usban category calls fvr residential densities between one and 17 units per acre. The Suburban(+) category calls for residential densities of between one and fiVe acres , per dwelling uniC. The overall site density prapvsed is 3.7 units per acre, wi#h propvsed densities per zontng cIassificativn as foElvws: UR-3.5 at 2.90 lots per acre; SR-1 at 2.09 lots per acre; and UR-1 2at 14.00 units per acre. The proposal includes a density transitiora between the multi-family units and srraaller _ manufactured home lats vn the north and the largsr nearly one acre lots on the svutFe. ' Open space is designated fvr 36.9 acres to provide bu#fer areas and protectivn #nr the lake and Saltese Creek shoreline areas, steep slnpes, drainage areas, and wildlife _ habitat areas vn-site. The proposal includes plans to enhance the existing habitat areas, while providing a sgft pedestrian trayl system, beach and picnic areas, a community center, an+d educativnal rraaterials far resid'ents. The internal road system vvill consist of a combinatian of paVed pub[iC and privats.~~} ~ roads with primary access points at Conklin Raad an the nprth and Ratchford ❑rive nn the south. Vllater and sewer service will be prvvided by adjacent pubfic systems. rm t~rrm water r~°iar~agement plan will be prepared tfl address retention of str~rmwater swales, drywelis, and retentiar~ldetentiorr pvnds. l~STW1.. Shelley Cake 2 , Qciober 1993 i ALTERNATIV'ES Tvva altematir►es to the propased action to rezvne and deVelop ~eJ~ Lake har~e alsa beer~ analyzet~. They include 1fDevel~rpment Under Existir~g ar~+ng, ar~d 2) aNv- Action alternative. Development Under Existing Zaning AIternatir►e ; This aIternative would allow the site ta be segregated into 7 0,000_ squace fvat parcels _ for areas zaned UR-3.5 and vrre acre parcels fivr the 24 acres zoned SR-1. The prQposed reznne to WR-12 and RUQ overlay far the entire site would nat occur. This would sllpvu the development of 225 buildable parcels, slightly iess than halfi the 460 units propvsed. 'Under this alxernati►re cvadway cnnnections would mast fikely accur at Shamrvck and - Galway 5treets, Ro#chford Qriye, and 4th Avenue, increasing traffic covnts on all of these roads. AIC roadways would be develaped ta ,public standards. There would be ! less demand fnr public services in the area. Withaut the PUD oVerlay there would be na area designa#ed as vpen spacea affarding nv protec#ian to sensitive features arrd habitat areas. No enhancement of wwldlite habitat areas would occur and' there would 4e no restrictions vn their use. Ahocnevwnec's assaciation would not fikely be farmed, elirninating the restrrctiae covenants proposed controflirag aesthetic and wildlife impacts. Nm educational Qr - recreational appvrtunities would be prvvided. - No-A►ct+on Alternative This aIternatiwe would tatally preclude any development vf the project site. Existing conditivns would remain an-going. The positive impacts on wildlife habitat areas discussed as part af tihe PrapQSed Actian would not accur. Ftecreatinnal and educatinnal appartunities would nat be prvvided. There i5 no publ+c benefit provided by delaying or precluding residentiaf deVelo,pment Qf the site. Urban services and road cannectians are aVailabIe hut would nat be pra►rided to the srte. NATURAL ENIIIRDNMEIVT 1.0 Water She ake's fairly stesp sides, gravelly svii types, limited wisibility, and high degree of water levef fluctuations haVS all contributed ta its lack Df aquatic vegetatian. The , current water quality has been degraded by up-stream and passihly on-site agricuftura7 ' practices. Fertilizers and pesticides have artificially increased nitrogen and phospharus levels. Peat rnining operations in the Saltese Flats have added substantiaily ta organic Shetle y Lake 3 Octaber 1993 i - particulate matter iraflow, which when decQmposed depletes dissalved oxygen _ supplies. Anaerabic canditions har►e 1ed to fish kills, reduced aisibility, and odors. The additiQn of impecious surfaces wirf change the direction and speed of an-site surface vvater. If nat managed prnperly the remaVal of undesirable vegeta#ian and disruptivn of sail could add to the amount of contaminants and sediment reaching the lake, , Vegetative buffers and retention ponds will slnw vr contain excessive run-off, '-,pceventing it from reachfng the fakQ. Design parameters estahlish setbacks that place davelaped pmr#ians of the site vn relatiVely flat slapes at least 50 feet ar more u pslo pe , from the laks's shareline acea. Large animal-keeping wifl not be allawed. Prafessivnal - water quafity sampfing will tae cQm,pfeted privr to initiating pptentiat lake management #echniques which may include: I • reducing upstream saurces of orgarric particulate matter. • increasing dissvlved axygen content xhrougFa aeration or artificial circulativn. • maintaining a stable water level through increased surface flow or pumping fram an existing weff. An erosian contrvl plan and a stvrmwater management plan vaill be compfe#ed. The 1 QQ-year #load plain eleuation ❑f 2027 estab3ished for Saitese Creek at the Steen Road bridge has be+en proposed and acCepted by the Spakane Cnunty Engineers, The existing overflow #o the gravel pit northeast of the site will continue to prvvide a margin of safety far contrvlling fioodwaters. The draanage channel and gravei pit wijl be secured for fiuture averflow corrtrol as required by the Caunty Engineers. The four iots that have land below eke►ration 2028 will be required to obtain #laod plairr development permits. 2. Piants and Animals Site develo,pment will likely encroach upon +existEng natural habitat areas used by wildlife. The PUD design aIlows for pravision of o,pen space to pratect sensitive habitat areas. Restricting domes#ic pets, livestock keeping, and herbicidel pesticidel fertiliaer use will reduce their irrrpact on wildlife hahMtat areas. IVlvst of the undesirable knapweed will be elirninated. Shareline areas fln either side - of the sof# pedestrian trail will be enhanced by planting of vegetativn with high va1ue ta wildlife. NBW tCeeS, 5F1fWb'S, and grasses wifl be introduced' to the site fvr fond', ' cmder, and nesting. Minimum Iandscaping standards wifl be estabfished in #he restrfctive covenants. These wity stipulate the type of landscaping permitted in the - transitivrr aQne between native and cultivated plantings for lats along the lake's shQreline. Educa#ivnal materials Cancerning habitat enhancement effvrts will be pravided ta sFte residents. Shelley Lake 4 . Octaber 1993 BUILT ENVIRONMENT 1.0 Land and Shoreline Use - The existing agricultural and rural land use character of the site would be altered due to the introduction of urban densities and public services. The proposed action provides a density transition between the higher density manufactured homes and multi-family units to the north and the lower density large acre lots to the south of the site. Project design includes a 50 foot setback of lots from the lake's ordinary high water _ elevation, providing approximately 100 feet of separation between the lake and housing structures. Therefore some of the homes will be within the designated 200 foot shoreline area, requiring a Shoreline Substantial Development Permit. Construction of a wooden bridge for crossing the soft pedestrian trail over Saltese Creek will also require this permit. The project will comply with all the policies and requirements of the Shoreline Master Program. The majority of the site is zoned UR-3.5, with approximately 20 acres zoned SR-1. A zone change to UR-12 for 14 acres currently zoned UR-3.5 is proposed, with a PUD overlay and bonus density for the entire project site. The zone change to UR-12 , would allow development of multi-family units on the northwest corner of the site. Bonus Density Points have been earned by designing the PUD to make special provisions for common open space, environmental concerns, internal circulation, public service and facility availability, using a design team, and providing a mix of housing types. With the proposed zoning and PUD overlay with bonus density, the allowable number of lots could conceivably be 772, although only 460 are proposed. If proposed under existing zoning with no PUD overlay or bonus density, only 382 lots would be allowed. The existing and proposed zones are consistent with the Urban and Suburban(+) categories of the County's Comprehensive Land Use Plan. Restrictive covenants will control the aesthetic appearance of homes and will ensure a safe enjoyable living environment. A phasing schedule anticipates an eight-to ten- year build out, with approximately 50 lots developed per year. . A professional archaeological sunrey was completed for the project site and included a records search and field survey. No significant cultural resources were found and therefore no impacts are expected to occur. Should a potential cultural resource be ~ discovered, on-site construction will halt until a professional evaluation of the resource can be completed. 2.0 Transportation Several new County roads are proposed to be developed within the project site. The . Shel%y [ake 5 October 1993 ~ vnly connectivn to the sovthern street termini will be Via Rotchfocd arive, wihich will be extended into the plat to tie directiy into Conklin Road, The intersection af 4th ~ i ►4►venue and Canklin Raad will be r+ecorastructed sa that 4th Avenue wilf make acurve to the southeast and fiie inta Conklin Road at a90-degree angle. Primary ingress and sgress will be via Canklin Road northlsauth to 5prague Avenue. No thrvugh cannection wi[l be pcovided by this projectto 5teen Road. All roads will be paved and - developed to Cvunty Engineers s#andards. Rotchford arive will be #he only puhlic road within the plat. The majority of the roads wifl be constructed to private raad standards. ~ ?U 'D The plat witl be develbped in phasesi with 58 units compfeted by 1995 (Phase 1) and the remaining 402 uni#s cornpleted by 2000 (Phase 2). A traffic snalysis rnras prepaeed to address traffic generation, ledels vf service, arad the need for - imQrvve ments to m+tigate impacts. At full huild out there wauld be a projected 3.750 i vpd, with approximately 283 AM peak hQVr trips and 375 PM peak hvur trips. The largest peak hour generated traffic accurs in the PM when 246 vpd will be entering - the site. The fallowing cQnclusions are dacumented within #he Traf#ic Analysis included in Appendix D. • By 1995 with present background valumes all study area intersections ' will o,perate withirr acceptab1e levels of service; Sullivan and Sprague (LOS Sullivan and 4th (LOS E). Sprague and Canklin RLOS C), and Sull+van and 76th (L[]S E). Although these intersectians are currently on the margins, there is capacity for additi+nnal westbound and northbound rraouements. • 5hould the overall develapment and growth af the area be maintained at nearly 3.0 peccent, twa of these intersections are expected to fail priar to deVelopment of this project; Sulfivan and 4th (L05 F) and SulliWan and 1 Sth fLQS F). This is due to westbvund to northbound lefts and higher through volvmes. • After the cDmpletion pf Phase 1, all study interSections are expected to remain at the same backgrvund ievel' of service ss projec~ed. This dves not mean tha# this development will not add additianal vehiclss to the transpvrtation systenn, only that #he intersectivns far 199 5 haVe the LQ5 capacity for the increase in back9round traffic and the develapment of Phase 7. • With th+e completion of full build out af Phase 2 by 2000. several ' intersections will need impravemen#s to allow the dalume o# anticipated ~ traff ic to pass at reasonable levels of senrice. Sullivan and 5prague, due to the design of the plat directing trips to 5pra$ue via Conlclin during the PM peak haur (ay adding SD - 90 1eft turns frvm th4s pro}ect, added to ' xhs 7995 expected 420 existing PM peak hour left turns), will 6e pushed , bsy9nd its capacity to serve ieft turns. Additivnally, the Spragus and 5he!!ey Leke 6 Uctvber 1993 Canklin intersection during the PM peak hvur will drop to an LOS ot EIF, v►►ith LOS E being the minimum standard for an unsignalized intersection. -►4lthau$h the additivn of 58 single-family homes in F'hase 1 and assaciated traffic will , cvntribute to the e^xisting traffic currently using the 5uilivan Raad and Sprague Avenue ; carridors, the oniy impact will be that tawards the cumulatMve average daiiy traffic volumes. The praposed development will nv# [nave any signlficant irnpact to levels of service through dhe development of Phase 9. Spokane County has identified level of service as the Indicatar far problems assaciated with development and, there#vre, based solely on LOs this praject will haae np impact. Howeuer, subsequent , development of this plat in cvnjunction with development in and around this area will require the iranprvvement vf several streets and roads within this gerreral area af Spokarae County. At the corraplefivn of Phase 2a traffic signal may be warranted at the intersectivn of - Sprague Avenue and Cvnklin Road. This signal would be necessitated by a cornbinatipn vf f c+~rs including the cvntinued area development and graw#h t exclusiye of tlhe ell Lake prvject and the addition of the Shelley Lake aolumes. However, this sigrra should anly be pravided if at least four signal warrants as outlined in #he MUTCD are being rnet. If this intersectinn meets warrants and the _ 5~~1al F~c~S ~1Q~[ ~#BBl1 If18tr~IIB[~ ~ICto~" t0 PI1S5e 2 CflR'hqletiCi~1, then it is recommended A tdevelopment cantrihute, via an RID, toward its develaoment and coas rur-tioct. i4dditioraa y,Tf`T t Feackground traffic soutFibvund to eastbound le r IAQ ' an a0itianaITeIt tu- rn being required at the SuElivan and Sprague inter tkn npkr-to_ the cvm' oEetion-.of Phase 2. rf this dual left turn situativn is not present byJhE complete bvildaut-n~-Phase,2, then_ it %s recommended that this de►velQpnmt cvntrihute, via RII3, towards its develqp rrfent and construcJLQ~ (fbNCMur.riDrU W2~0 -ro t:roc I = rDVL A-LTVAuArL. SmmW&AD$ 4' ar bNAHLj 2Ar/e,A), 8y utilizing the growth cates far the overall area, it is unclear as #o whether the development af the Prvpvsed Action wauld require the imprar►emerrts reCommended due 4o its development alane. 1Afith other area develQpments these amprovernents are recammended and required in some instances ta aIIDw throvgh traffic pragressian. Develvpment of Phase 1 can be implemented withnut ha►►ing a 5ignificant lmpact to the vuerall area tranSportativn system. ie - 3.0 Pubiic Services - An additivnal 460 residences will be added to the responsibility vf Uistrict Na. 5 of t'he County Sheriff's Depantment, The added papulatian wiH increase the number of peapls requiring service and the number of crimes connmitted. Project design makes RatchfQrd f3rive a callectvr arterial, which places Fsvmes aIang Rotchford in the 19% potential crime rate categvry with an increase from the currently existing rate af 'l 5%. The rate at these homes v+rould be aqual to the averall aVerage. Hawever the private - Sherley Leke 7 ncto[rer 1993 _ community type of design praposQd which includes vnly twa access points inta the development and perimeter ferecing typically generates less cakls fvr ssrvice t'han #he grid type o# street desMgn. Many of the upper-incame hnmes wili ha►►e resnurces tv ~ insta11 individual securrty systems. The formatian of Block Watches will be encauraged. Approx7mately 274 school children are prQjected ~t full build nut of 460 residences. 7he increase will be gradual based an an aight-to ten-year development with approxima#ely 30 nQrw students per year. Adams €lementary and Greenacres Junior High are nearing capacity ac+d will de impacted hy tFre add'ition of new students fevm this and vther residential deyelopments. There is adequate capacity at Central VaCrey ' High. HoweVer Schaol District Na. 356 needs tn carnpEete their existing expansiorr -plans and requests that impact fees be Valuntarily paid by the deNela,per an a per Iot basis, , The new residencBS will increase the demand fvr park space and facilities, with mast of the impacx occurring vn organized sports facilities. Qevelopment 4f the site will preclude Shelley Lake°s acquisition hy the C4unty Parks Departenen# as recammended - in their 1989 Rlan. Recreatianal app+ortunities will ae pcovided by the praject, includFng a saft pedsstrian trail surraunding the lake, picnic facilities, s swimrning , heach, cnmmunity center, and potentially an area for launching nvn-motorized baats. Un-sEte actiVitfes may include walking, jogging, crvss-country skiing, birdlwildlifs observation, fislhing, ice skating, and' perha,ps rawing and canveing. The dedeloper will be required to sign a document agreeing tv any future impact fees impvsed by the Board of Caunty Cammissioners that helA mitiga#e impscts on the Caunty Park system. An additianal 460 residences will be gradually added ta the responsibility of Spokarae Caunty Fire PratectNVn bistrict Na. 2 Qver an eight-to ten-year build out periad. This may result in an increased need fvr additional manpower and equipment in the area. Fire hydrants wiff be 14cated thrpughoui the praject site and svpplied by adequate fire flows. Restrictivns will be placed on the Wse of non-#ire retardant buifding materials and wood shake rvvfs. PrQViding a svuthern sccess rvute through Rvtchf+ord Drive " will keep PB5pQI1Se tIr11$5 from the new firs stativn at 12th arad E►►ergreen ta a minimum. 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' ' ~ " . , _ • ~ ~ - ~ , _ . • ~ _ , +•~YX~ ~"~"•`f ~51 :5• p, .~.~T • ' ' ^ L - ~ . . ~ ' ' a .j . _ ~ ' ~ ` ' ky•~ rl~~`~.J. y~S;~R'~'p, 7 bL ••L .[~•"~A~ , Y ` Y . - ' i `~_n ' ' ' • , ` yAn^ ; ' • t.~i~~ ~~'[~~iL.'~'~..+.t~i .,h~ _ . ~ • ?J. ti ' r r n~ ~ ' . ....~T .n~~~~ - ~ ~ ^ •~M1 ,~K..~4!`~i~ I . - L ■ ROPV SEi/ ACI ION The proposed action incfudes a preJiminary plat with a planned unit de►►eIvpment [PUD] o►►erlay zone on approximately 123.8 acres. This prvpased actinn would a11ow the deveEopment of 460 new residential dwelling units and prvVide substantial vpera space areas thrflugh the provision of clustered sots. The praject site conta+ns sensitive - aReas such as Shelley Lake and ats assuciated wetlarads, areas of steep s4apes, and , wildli#e habitat. Deaelapment of the project site by utilizing s RUD cancept can protect, manage, and enhance these sensitive areas. --The prvject site is iacated in the Spokane Va[ley, approxima#ely 1,340 feet east of ' Sulli►ran Raad and approxirraately 600 feet south of Sprague AVenue (see Figure 1). - The site lies nnrth of the Rotchford Acre Tracts 5uhdir►isian and car+npletety surrounds - Sheiley Lake in Section 24. Township 25 Narth, Range 44 East,'W.M. (see Figure 2). A reaone tv llrban Residerat6al-7 2 (UR-1 2) with bvnus density is propased fvr 14.0 acres on tlae west side of the site to allow for the develo,pment of 196 multi-farnily 'units (see Figure 3). 5ingls-famiky resideratial iots will include a rnixture of housing types includzng 68 manufactured homes on platted lots in the northern area of the site. 158 cnnventional hvmes an small lods arvund 5h€Iley Lake, and' 38 large lats vn the site's southern portovn. 7he propanent's objectiVe cs tv create a fairly privats residential cammunity on a site that is currentlyr undevelopedr with a Variety of parcel siies ranging from approximately 6,000 square feet to 41,000 square feet, and _ appraxirnately 36.9 acres of open space. The averall srte density propased is 3.7 units per acre. Praposed densities per zvnin g classif ication are as follows: UR-3.5 at 2.94 Ivts per acre; 5R-1 at 2,09 lots per acre; and UR-1 2 at 14.00 units per acre. The cninimum Ivt siae for the UR-3.5 zane with a PllD overlay is 6,000 square fee#, witFa an overall maximum density of 3.5 dwelling units per acre. Within the 5R-1 zvne the minimunn lvt size is 15,000 square feet with aPUi] caverlay, provided the dverall density daes not exceed vne dwelling unit per acre. The minimum lot size for the UR- 12 zone with aPUD oVerlay is 800 square feet, with an averall maximum dens+ty of 32 dweliing unrts per acre. A total of 2.25 units per acre of banus density can be Qarned with #he pro,posed PUD design and applies to each zone cIaSSification. This results in a tatal of 704 units sllawed for development, arthough anly 460 are being prvposed fvr ful[ deveropRnent of the prajact site. Fuli build-out of the proposed developrment is expectvd ta take place aver an eight tv tero-year period, depending on housing rnarket conditinns. The prvject site will be deVelaped in phases, starting with impravements snd comstructian in the narthem area and proceedirag sauth. Apprgxrmately 50 hames are expected to 4e canstructed per year hased on eurrent market conditions. The praposed prefiminary PUD plat has been designed in an effart #o keep enviranmental impacts tv a minimur`n. Environrr►entally sensitive site desigrr and engineering includes locating the platted Ivts an relatively filat sl+opes, providin$ fvr a Shelley Lake E15 9 • OctQber 1993 minirnum 50 fvot open spacelbuffer area hetween the lots and the Iake's ordinary high _ vvater leael, and' retaining large portions of the naturai +vege#i~~e habi~Eat areas, sr~d ste~:per slvpes in flpe~n space. ~4n QrosiQr~ cmntrol pla wi e preparetf and implemented p'rivr tv site constructinn, and may include techniqves such as stravu bales and netting tv protect slopes and associated sucfac+e water during cvnstruction. A drainage cvntral plan vutfining sedirnent basins and retentian ponds will include identificatiara of rYaethods and rnaintenance fvr storm wateQ drainage control. The site has been desigrred sv that the IawesA #loor of h4mes will be 'ocated at least two feet aboVe the lake's 1 Qa-year fInvd elevation of 2,027 feet, in accordance with the Countty's Flood Plain Drdinance. Development of the project site will encroach ru,pan established wildlife habitats and rnigratory rvutes. The 36.9 acres of open space is designed tv preser~e mvst of the - site's natural Wegetatian, prvvide svbstantial buffer zgnes around wetland sreas, and ; maintain existing uvildlife habitats. The apen space areas will be protected and restriiGted frvm future de►►elopment. Methvds to enhance the existing ►wildlife habitat areas will include pIarrting vegetation of high ►►alue to wildtife aIang the shoreline, ' rernoving a substantial arnaunt of introduced vveed species, and prvviding educativnal materials to residerrts concerning avildfife enhancement programs. Development at the prvject site will impact the existing extecnaf transpvrtation system within the vicinity of #ne site hy adding populativn to a previously uninhahited site which will gQnerat+e tiraffic. This prapvsal creates new roads withira the site to access the lots and prAvide ingress and egress fram the site. The majority v# the roads will be private, except for the extension of 'Ratchford ❑riVe narth to 4th Avenue and Cvnk1in Road, All the roads will be pa►►ed and built accardrng ta County Engineers standards for public and private roads. Access to the develQped site is praWided by Conklir► Road tv the narth, 4th and 1 fith ►4venu+es ta the west, and Roichfard Drive to the svuth. 1tSGuScroO C]F: 4Tc:&a At~ ~^10 NArV 9-C**0.0~ ~(6 C. 100-9 C 1 tJ 4o PtT 4ak~'rti► VA4.1.+W J ~6QKLJ'f►~ 120*0. The project site is ssrved by Spokane Caunty Fire Poatectian Distriet No. 1. The pistrict is scheduled to open a new stativn at 12th and Evergreen which wiJl have first response to emergency calls frorn the site. Fire fighting services will also be enhanced _ due to thae irrclusian of fire hydcants and an adequate wa#er supply and pressure system on the site. All private rvads with less than 30 feet of paved width hsve been designed with a 30 foot inside curb radius an corners instead of the standard 20 foat radius. This will praaide adequate ttirning radiuses for the I]istrict's existing and ' prapossd Iarger fire engines fvr ease ❑f rnoVement within the site. AcGess to the site ' is prmvided an fhe north and sauth to minimize cesponse times far emergency ►rehicles. Poaice prQtection within the area is proVided by the Spokane County 5heriff's department. Since the site is largely undevelaped, there has not beera a great need far paiice services in the past. The intcaduction of 460 housing units wiil increase the ' demand for ,police prQtectian. The prQject site is Ivcated within Centra'f'Valley Schaal District No. 355. The sc'hoals Shefley Lake EIS 10 Oclaber 1993 ' serVing the site are Adams Elementary, Greenacres Jr. High, and Central llalley High ScIhooF. The eFementary and junior high schools are at maxirmum capacity. The added pvpulation vf appcoximate7y 934 peaple to the area cpuld pvtentially result in 274 new 'students generated froen the site. This increase would accur graduslay aver an eight ta tecr-year periad due to project phasing, _ The recrea#innal facilities planned as part of the projec# incfude a saft pedestrian trail surraunding the lake ►nrith access provided ta the Various residentiaC areas, a swimming beach, picnic areas, and a community center. ACcB55 WiII be proYIdBd fO the Wa#Bf'S ' edge at vsrious points alnng the lake fivr fishing and an area rnay be proaided for nvn- pawered boat launching. Winter recreativnal activities could include ice 5kating and Cfi]S5-CAurltry 51C11ng. The open space arsas are designed to provide recreational - vPpartunitees fur project residents and to pratect the natural resaurces ot the area. ~ 5ewer serrrice will 4e ,pro►►icled by Spakane County through an extensian vf adjacent ~ se►►ver rraairrs. Vera Water and Pawer will 5up,ply +electricity and' water ta the site for consumption and fire pratectidn needs hy extendrng existing mains. Vlfashington 4`Vater Power will supply natural gas ta the site, Cox Cable will pravide cahle televisivn and US WEST will prnvide phvne service. E#ectrical, cable, and phvne lines serving the developmen# will be buried undergrvund. Curbside solid waste and recycling cvttectian will be prvvided once per week by Valiey (aarbage 5ervuce. The project site will be entirely fenced with a ►rariety vf bardering techrriques to help create and maintain a private cvmmunity feeling. Those areas bordering existing - resideniial neighborhoods will be se,parated with a three foot berm and three faot fence with landscaping or a six faot cedar fence dependin+g upan site tapvgraphy and neighbarhvod input. These barder areas and the entire 36.9 acres af apen space will be maintained by the 5helley Lake Homeowner's Assaciatdan. CavenanCs and restrictions will hs pre,pared as part flf the development and will address such issue5 as house design arad calar, Iot landsca,ping, open space use and access, ,pet leashing requirements, and anima!-keepin$. Homes built within the prflposed develo,pment will be subject #o strict architectural cantrol and review. Maray of the uses allawed in the UR-3.5. llR-12, and SR-1 zvnes will nvt occur withira this piaraned deVelvpment drae to the restrictive cQvenants which will be strictty applied tu each lot in the PUi]. The vutright permitted uses in the U R-3.5 zQne accarding to Section 14.61 6.21 0 of the 5pnkane County Zonirag Code are as fallows; 1. Clustered housing with an apprQved' PUD pverlay 2. Manufactured home ,park , 3. Cammuni#y half, club, or Iodge 4, Public utility taansmissivn #acility 5. Qay Care cerater in a church ar public or priVate school Shelley Leke E15 ly +Dctober 1993 S. Cammunity transit center Park-and-ride facility Listed belvw are the Accessory Uses fvr the UR-3.5 zone as descrihed in Sectivn 14.616.220 of the Zflning Cade: ; 'I . Carrrmunity recreatian facility when approved witih a site or building plan 2. Hvme prafession , 3. Salar Gollector and assaciated systems _ 4. Pigeons, perfarming and show 5. Private tawer ~ 6. Hobby beekeeping The fo flowing list is taken fro m the 5pokane Gpunty Zaning Code Section 14.620.270 and includes the autright permitted uses within the UR-1 2 zane: 7. Clustered housing with an approved PUD overtay 2. ManufactuRed home park 3. Public utality transmission facility 4. Day care center in achucch ar ,public or private schvvl 5. Cflmmuraity transit center - ~ fi. Park-and-ride facility - The following are the Accessary Llses fvr the UR-1 2zane as outlined in Saction 14.620.220 of the Zoning Code: 1. Hame prnfession 2. $QlBr C0ll8Ct❑f aIld 85SoCiated SyStBfT1S 3. PrIVBtB toWQr The follawing list is taken fram the Spakane Caunty Zoning Cvde Section , 14.612.210, and includes the nutrigFat permitted uses vuithin the SR-1 zone: 1. Cfustered housing wrth an approVed PUD overlay 2. Manufactured home park 3. Cvmmunity hall, club, oc Ivdge 4. Public utility transmission facility 5. Day care center in a church vr pubJic vr priuate schadl ~ fi. Cvrramunity transit center 7. Park-and-ride facility 8. Agricultural products stand _ 9. Animaa raising with enclosure setbacks, sanitary canditivns, equiValency units, and density requirements shelle yLake Ers 12 ocrober 1993 _ The fallvwing are tFae Accessory Uses for the SR-1 zone as outlined in Sectian 14.612.220 of the Zarring Code: - _7. Cnmmunity recreativn facility when appro►►ed with a s+te nr deVelopmsnt plan 2. Hvrne prvfession _ 3, 5vlar coElectvr and assvc+ated systems 43 Pigeons 5, Private tower fi. Commercial beekeeping 7. Hobby beekeeping - ShelfeY Lake EIS 13 ' October 1993 l vi slt:;_,I' ~ ~ , 4~W~+D, 4 ~t `f F` r} , - ~ _ R`- , . •-L-~ ~ ~ . ~ - I " ~ v~-y -__y . i.~` ~ ~ L ' V ~ ~ )~h❑ L . r~ 7i~ ~ ~S P~ ..r1 e~' ~ I ~ 7r I a 6 ~ t...~ d~~ r• ~ 1-7~ L j, s ~:~l~~ ~ z , - ;7 S •-IJ [..v` • ~ ` ~ ~`~1 7a,~k 3 ~ e! r o ~ • ~y ~ Gq N rentw rku ~ 1 d d ~ qy~c! ~ & kA Q ~ ti' A ~ N7E~ t r '1 - _ ear C ENard n ~G yEZn~a ~ANEI rk 11 62) J~Ci 1 ~ 41 ~ - i 27 .1B ~g Dvn s I ~ l - - e~ . ~ ~ HOSprt~ WJT' f $ki LiP r~ J , Carls rSy lske 41" 4Waten.~ - _ _ ~r~, ~V~+d[e ~ ~ f Sr,er~~.1; - Tenk 1%f3lL+F 5 e1, ' •WBt;~ ~ ~7ank' T y P _ l~' Y'r r i Ten a ~ ~ A~•~~ i. 7` 6l7 ~ ~ I/f (S r' _ r' E • ' . ,~3 i. ~i ! ,1 r~ I . r•~ ~ Id, nt~ ~ ~{`•J,~ ~ - ~ ~ i• ~~l ~ ~ ~ ~'e ' ~ 1 ~ f•~ 'ly l~ y S I I i r , ~ « ~ r. ~ { ~ { 0 ~ ~ 1~ f ~ d 7S • l - „t,~' 1'•'~ e ~ ~ , ~ J 3 • , 'awn Phi 1i .L T fe . 1 1. ~ ~ ~ ~ I_ ~ ' ' _ _ I t • ~ ~ r ~ • ,I • d t ` ? ~ , ' / ~ ~ e j.. _ _ k Jy h ~L F~ ys,t~~, ~irj~~ ~ •i~i' a ' ~ 7' ii r'~~~ i s { ~a ~ ~ ~F..~ti~~ i ~ ~ f! .n .1:~ -I ~ ~ Ji..,'j ~r ~s=7..•~~~~ ~r d f r / 0 ,f`~ lrAS~lOppzl ~ f.~.~-' ~ [~1 ~8l~~ ~.-t~ ~0.. ~f, ~ ~ J ~ ✓ L P~~k i BOURCE: U.S.O.S. 30 x BO MlPlil'TE SPOK►1NE. WASIiIRi[iT0111 - ICIAMO qUAQRANGCE DIITE: OCT[]BER 1998 ~ &CALE. NQHE FlGlJRE NO: PfRaiEC'r No.: 92-032 ►JlClNIT1f MJAP 7 SF1ELLEY i.AKE PRELIMINARY PUD PC.QT d?a.mm c43.:iodafFu, i2C. ENyIROryMENTAL IMPI4CT STATEMENT _ _Rp.liqTlONp`L p _ -~6ofa~p '~d ~r''~fF;r.~ y ~ • ' ~ .o , ~p 3-..r I~,• 4~ +~,,t,~r~:17~`~. ~ ~ ~ • •.P ~I... _ ~m „f~v ~^a SY~k"'~~~~'S'~1 ~~~~.~^r'" ' ~ . . . ~M•' 9 . .~~c~s-..., " ~ 4-. ~ 1 rL•• ~ ,r~'i A ?,r ' f ~ ° ° ° ~ # 1 .•'~4~~ '47't~ ~❑~Q. ' . k . ~ ~t • : a TI~ M ~_~~fi~~ ~ ~ _ r]• ~~+f ~ ~ • a - ' . ~ a • o Q~ R ~a ~I . °M15.~^lf7W. _ .y. . • i . . 9 - =.a~~y - ~ . . - : . `s••si _ , _ _ ~ L.•~ ' ~ ~ ~ ~ - ` ~ ~ vao - _ . . ` f' QT$~.'Ila4PPS~ : 'I;• ` A ' 6 • s e " ! . . . I ' ~ .I. . ••~~30 :V. ~ 1?052 ~ __J~~ ~p d035 13 ~ . . . . ~ : 1 ~ ° ' •~I+1$ . • I. ~4 ~ r.. • ' -~.J,': I iJ~ PmRrcee ~ , • . • ..~I•..:..° , ~L Sch ~ °Po° `~lr' 'I_ 2073 s 9~' ' . . • . . _ ~ ~ ~ ~ , 'wpr + i~ a ~~f~ • y .-VALCEY , ~ ~ ~ . . . . o . . .o . ~ ~ ~ v v ..o..a ° dr HiA t . . • • i . ~ ' ~ ■ ' ~ ` ; E r ~ _ . ~ . . . tirh r - ~ " '~~T n ` ` L -4.•' - T, ~ O ~ ° ~ .H . " ~ = Y ~~S.Fale ~x" ' ' 7n; ~ • ~ ~ j~ ~ caNe ~ ~ ' : ~~',~.ni+'~.~i~~ • ' ~1 a {AM=.~+~~q a. `I ~ _ . ti . ~ rill~'_... . . • i _r e _ ="~-a,~-~: , = ~ ~ ~ - , . ' . . . r, ° ~~C~.n'~ ~ ~ 0 . ` e o~ .ep~ ~ . . ~`h~ ;~J ' e~-sP~aaGu~ ! . , . e ~ . a ca• l ~ 'l_.~_ - I F. r ~ • I ~ ~ • • • ~+iOV~~ tl ! ' ~ • Sch orrr ~ . . Tra !er ' ~ Z. ~ , ~~a . o v • o , o J e ' ' : . _ ; ~ • Park ~ eQ' J: • ~ ( j11' ~le°~ . . 020 5o- i _ ~ • - 6~g ~ I . • ~ ~ ~p~d C ~ i~O ~M u ~ ~ ~ • • . . . • ~e.!~~••~~ ~si,h~mti ~ ~ ~_p ~~~~~~`il~n~~~~ ~ ~j ` • y,, • • ' [;rnttaIVdllev 2~ , ligh Sch ^1-.; i li } ~ ] ~ ' ~ r-_I~75ewa e QisRasa ~ ~ss ~~ifBYel . ' : ' . . . . . . . . : i • - - r ~ " ~7.''"~~ ' ~ ~ ~ $lTE 5c~ It I'i, ( t ~i ~~i~' •~'=°I.=~ =~a__3 ~ ° •...I~'~ ~ . :".~y~ ~ ~ •J. ~ • `rJS B pit~f~~'~~i • ~ ' r-~+' •tly. , 1r--1 • ~ I! ~ 4 ~ '♦r f ` ~ S; • : . . ~II ' ~ 1 ' s' • f - ~ L'a rav crcrn • ` ~ . . ~ . ' ° ; ~ . . 2.7C7Q : r 1~ S : . ~ ,'~I7 ' f • ~ ~ ~ ~I~, ~ 4 ' I ~1 E• P''-ti Pif~ i S r t p •i• rw l~=-3'~ „k S~Arrr~ ?OB?e . .•7avAl~ ± . ' . , •~r~,l~ • ~ ~ 1 ~ r ~ ~ + .~-tT,~-,-~~ ~I• • ~ A ~I• I + t g~~~~lrt~ ~ ~ ~ I 'I ~ ~ l~ ••5 -ti . ti • ~ ~ ' ~ q ~ f~~~ i~r` ` ~r~' , ~ ; "i ^E a ~l ) i c ~ ~ , • r~ , ; o, f• . • . ~ - ~ ~ , s~ ~i - ' 'i ~ ; ~ ; ' i I r G ~ ; ~r.-s• ; . , i - -t i~ ~ ' ~ ~ ; ~ ~ ` ~l'' ate 4~ - -I_..• ~ a , ~=Yc--=> weii~6o..~rra~L;.::":I~~~ - ' ~~~.a,• ri~ i+~ ~ ~I , ~ . _ . ~ ~~i 9~• } . 'zas~ - p' i 4' f ~ f , • ~ ~ ~ j I •I ti, , . . • ; ~~'•.~i•..u { ~ ' ~.~~xszaa+ ~ ~ ! T.3oa ~ y . . .Y~}~•''~'1.1 ~r ~ ~ I~~P I ~ ` - d~ t.l ` ~ SOL3RCE: U.S.G.S. 7.5 'N111UllTE G3iEEAlA[aRES [2UADRANGLE DAYE: OCTt7BER 1993 ~ SCALE; NOA[fe F[[3llRE NLI: PRDJECT N0.; 92•032 AREA MAP • 2 ~~7 SHELLEY LAKE ~'RELIMINARY PUO PLI~T ~Q-'~~ ~6'~'Oc~~1► ~~'c. ENVaRQNMENTAL IMPACT STATEIIAENT 11. REASON.4BlE AL TErRNAT1VES , Two alternatiues to the prvposed actiora to rezone and develop Shelley Lake are als❑ given consideration. They inc6ude: 1y❑evefopment Under Existirrg Zoning, and 2) a[Vv-Aetivn alternati►►e. The fallpwing is a general discussion af impacts regarding these twv afternatives. 1.0 []EVELOPMEN7 UNDER EXl5TING ZOf1EING If the project site was alivwed t4 deve[op under the existing zoning, the prapused ' rezane to UR-12 dUrban Residential-9 23 and PUQ over6ay far the scte would no# occur. _ The site would remain zoned UR-3.5 (lJrban Residential-3.5) and SR-1 (Sutaurban Residential-1), This would allow the site ta be segregated into 10+000 SqUare ff30C rriinimum parcels far areas zoned UR-3.5 snd ❑ne acre minimum parcels for the 20 _ acres zaned SR-1. Maximurn densities far these areas are three and one-haff t1welling units per acre (LJR-3.5) and one dwelling unwt per acre (SR-1). p conceptual layvut ' plan fvr development under existtng zoning U51n9 the5F: den51t1e5 is presented as Figure 4. This alternative would allaw the development vf 225 buildable parceEs on fihe siter slightly Iess Chan half of the 460 vnits propased. This lower density would mvsi likely result in ivwer quantities of impervious surfaces than that propased, due to the development af fewer housing structures. Hflwever this alternafiive would be developed vuith ai8 public roads, which are wider than the mastly pri►rate raads included in the Prapased Actian aEternative. If there are lovuer quantities ofi impervi❑us surfaces, then less storrarowater run-vff would be gerrerated by this afternative. oweve . ..r'ri'ar'raVem" TIP-kJC _ ~ - i ~ ~ If the ,~roperty were ta be subdi►~ided, the applica'b!e standard ~fram theiCounty's Shvreiine Prvgram is a ZQQ-favt structural setbaclc unless a Substantial De►►elopment Qermit is obiained. If the land were ta be segregated via exemptian from the subdivisian regulativns RCW 5$.17, then only a5Q-fvot setback fram the ordinary Yrigh water mark would be applicabie. Develapment under existbng zaning would mast likely include road►rvay connectians at the existirrg termini at 5hamrock and Galway Streets, Ratchfvrd OrGve, and 4th AVenue. This would increase traffic caunts on these raads and haae a greater impact than that prapvsed on the ad}acent Rotchfard Acre 7racts tQ the snuth and th~ 4th AverouelSulliVan Rvad intersection. However less tatal trips per day would be generated from the site wath anGy 225 residences instead of the proposed 460. Ala raads would be deveCoped to public rather than mostly private roadway standards. Shelle y Lake f!S 17 October 1993 There would be a less/demand for public services in this area due to the decreased number of dwelling units and associated population. With sparser development, the schools serving the site would have less demand placed on them for educational services. However the school district would still need to provide bus service to this area to accommodate the relatively few children needing transportation to and from school. There would also be less demand for police and fire fighting services due to the lower population levels. The increased number of transportation access points would decrease response times to the site~ yet d ~a" onllpc *T ~ J Lower population levels than those proposed with the zone change and PUD overlay would at first appear to result in less disturbance to wildlife and habitat areas. However without the provisions of a PUD overlay zone, there would be no area designated as open space, affording no protection to sensitive habitat areas. In addition there would be no provisions regarding future development of these areas and no restrictive covenants to govern their use. A well coordinated plan for weed control along the lake's shoreline may not be implemented. A wildlife habitat enhancement program would not be developed and there would not be any coordinated effort to improve the water quality or stabilize water quantities within Shelley Lake. The development under existing zoning alternative would not include the formation of a homeowner's association or restrictive covenants. This would aesthetically impact the area by not governing paint and fence colors, types, and locations. There would be no perimeter fencing or berms with landscaping creating a private community feeling and increasing security. There would be no covenants guiding landscaping practices with wildlife habitat needs in mind or preventing disruption by domestic animals. Animals allowed to freely roam the site would likely disrupt the native wildlife. Large animal-keeping would also be allowed because it is permitted within the SR-1 zone, but there are no guidelines or restrictions governing this practice. There would be no coordinated educational program targeting area residents concerning the site's sensitive environments. Recreational opportunities would be limited with this alternative. No trail system, community center, swimming beach, or picnic area would be provided. The diversity in housing opportunities would be lost with implementation of this alternative. 2.0 NO-ACTION ALTERNATIVE The No-Action Alternative would totally preclude any development of the project site. Existing conditions would essentially remain on-going, including current agricultural production. There would not be any impact to public services if the property did not develop. Additional school capacity, busing, and fire and police protection services would not be required. Utility and roadway extensions onto and throughout the site would not occur. There would be no increase in off-site traffic generated by development of the Shel%y Lake ElS 18 October 1993 site. The Iaclc of fire hydrants would result ira less water aaailah0e at the site for fire _ fighting purpnses. There would be nv additianal impervivus surfaces added to the site. 5tarm water run- off generatian ►rvauld remain unchanged, however existing impacts to Shelley Lake that may be caused by agricultura'I product run-vff (i.e. pesticides, herbicides) would continue. The pasitive impacts +an wildaife and wildlife habitats outlined as part of the Prvpvsed ►4ction would nvt vccur. The lake would continue its witfe ►rva#er level fluctuat+ans and would prabably continue tra be severely impacted by suspeeted upstream land uss aetivities. No coordinated effort would take place to manage the existing water quali#y and quantity vf SheIlsy Lake, whECh would substantial9y improve its fishery resaurces, vegetatiue and wildlife s,pecies diVersity, recreation potential and aesthetic appeaP, as well as irnproVe tfae waters fvr aqui#er recharge. Hawever, the Iack of people would remove aray patential for encraachment on existing rnrildlife and' vegetative cammunities. The recreational opportunities included in the Praposed Activn alternative would not be prv►►ided. Access #a the site is currently restricted by the prflperty owners and no permotted recreatianal appflr#unities take place on-site. The lack ❑f residentral deV$lapment would cantinue the possibility vf #uture purchase by the 5pokane County Parks Department, as outlined in their future acquisit+an pfans. Howerrer there is a severe lack af franding fvr park property acquisitivn and additiQnal funds would b€ required fvr praperty maintenarace and water quality im,proVements. C# park acquisition were to occur, Cvunty impravemerats may well be limited compared to those pro,posed by this praject. HoWeVe6, ►ecreatianal flpportunities at the site would be aVailabae far use by a11 Caunty residents. There is no public benefit prvvided hy delaying or precluding residential deVelapment ❑f the projeet site. Grban services are available nn adjacent prvperties and the praposed project would provide road connectivns and urban services t4 the area. Additianal pubEic benefit would be prvvided by impraving the quality af the 9ake and providing long-terrn prcatectian to the wetlands areas. The site's senSiziVQ habitat areas would be enhanced and maintained through the hcamevwners association. .Shelley Lake E!S 19 Octo6er 1993 1 ~n h e r ` ' ` - ' r • 4 = ' ` • , T L . ' ~ ' _ - ~ EN - 1~ ~ . . h ~ ~ tCT ~ a! P ~ ~r ' r ` ` t - , • NT I~ ~ ` ~ . ~ 'SIONIFI~ ~ ~ES,, ITIGATIN • ' ' ` • ` ~ , AND M ' - , . ~ • ' .N . . ~ - ` ' ' ' ' , ~ - • e r _ , • _r , ' ' ~ ` • ' • ' , ~ ' s' r ' ` ,r••- " . . r ~ . . _ ' . - ' • ~ . . y . . , ~ 9 ~ , " , ` • ' _ F • • ~ . . ~ * ~ _ • " ~ . - r 1 . ~ _ ~ ~ ' . ~ -0 , ' ~ !p~ ';t]. ~ 4• . ~ ` - ~ NA TURAL ENV/RONMENT 1.0 WATER 1.1 Surface Water Quantity/Quality a. Affected Environment Shelley Lake lies in the center of the proposed development and currently consists of approximately 21 surface acres at the ordinary high water elevation established by the Department of Ecology (see Figure 3). Inflow to the lake is provided by Saltese Creek, an intermittent stream which flows into the southeastern end of the lake. There is no surface outflow. According to the Reconnaissance Data on Lakes in Washinqton - Volume 7, Shelley Lake lies at 2,025 feet in elevation, has a total surface area of 37 acres, a maximum depth of 41 feet, and a total volume of 710 acre-feet (see Figure 5). However conditions have changed since these figures were estimated in 1952 by the Department of Game, and the lake has significantly decreased in size. The Department of Ecology established the ordinary high water elevation at 2,009.1 feet, 15.9 feet lower than the elevation previously reported by the Department of Game. At this lower elevation, the lake consists of approximately 21 surface area, has a maximum depth of approximately 25 feet, and a total volume of approximately 231 acre-feet. The lake's water level fluctuates seasonally in accordance with precipitation amounts and the resulting intermittent stream flow. Lake levels were monitored from late March through September during the course of this study. In late March the lake level was a few feet below the ordinary high water elevation. By late May the lake had risen up to this mark, but by mid June it had fallen back to below its previous level. Similarly stream flow was high in late May, but by mid June the streambed was totally dry. The current property owner reported that Saltese Creek flows into Shelley Lake for only a few weeks during the spring of each year. Site visits in late June through September indicated steadily decreasing water levels, estimated up to approximately eight feet below the ordinary high water elevation. At this decreased level the surface acreage of the lake is approximately 15 acres, with a maximum depth of approximately 17 feet. Regardless of its surface elevation, the bottom of the lake lies at an approximate elevation of 1,984 feet. The project site is underlain by the Spokane aquifer, which is one of the most productive aquifers in the United States (USGS Water-Supply Paper 2265, 1988). As the only significant source of good-quality water supply in the Spokane Valley, it has been designated as a"sole source aquifer" by the US Environmental Protection Agency (EPA). Shel%y Lake ElS 21 October 1993 The Spvkane aquifer underlies an area of approximate6y 135 square miles and varies in saturated thickrress from a few feet to 500 ieet or more. This unconfined aquifer cnnsists of sand, gra►reC, cobbles, and boulders depvsited during se►►eral catastTVphic glacial outburst floads during the Pleistvicene era knQwn as the 5pokan e Floods. The aqviter is recharged by grvund water underflaw frana the Rathdrum Prairie aquifier in Idaho, by ground watsr flaw and surface water seepage from small drainage areas aIvng the Spvkane Valley margins, and by percalation fram precipitation, the Spokane - and Little Spokane Rivers, septic tan9c airainfields, and irrigation waters. The high ra#e of ground water movement through the highEy permeable aquifer materials has resulted in ground water quality being little aifected by oyerlying land use activities. Several streams drain areas of uplands adjacent tv the S,pokane ValiEy, including #he vutlet streams of Liberty, Newman, and Hauser Lakes. Hawever their fluws cease along tMe valley margins where the waters sink inta the highly permeabfe valley floor naaterials. The majoraty ❑f the praject site is underlain by f[vvd deposits consisting of bvulders, cvbhEes, and gravels, mixed with sand in places, that are mvstly cvarse and very poorly svrted. The gealvgy of the bluff acea east of the lake +cvnsists of undivided metamarphic rocks including coarse-grained quartz-feldspar-mica gneiss and medium- to f4ne-grained micacevus and sillimanutic schhst (USGS Greenacres Quadrangie Map), A layer of Latah Formativn cansisting of mostly clayey and sandy shale underiies the allu►rium flaod deposits and metamarphiC rocks (USGS INater-Supply Paper 2265). Basalt flows of the Cvlunabia River Basalt Group are pvssible anri an unjected basalt dike is suspected to be lacated somewhere near Shel6ey Lake fLyerla, dOEy. Sails of the project site rnvstly cvnsist a# graVelly and very gravelly Ivams, whth the bfuff area cmnsisting of very rocky and extremely racky compfexes. Shel{ey Lake was probabiy formed during the Spokane Floods and may be the result of a plunge pavl (Gulick, DNR). A plunge pool cauld haVe formed when water flawed over the metamarphic rvckcs an the east and increasing in ►►elocity scoured out a depression on the dawnstream side. Accarding to Dr. Paul L. Weis of the USGS, the ervded gra►►ef material was redepasited in a tearcirvp-shaped maund or bar downstrearr, 4southD of SheIRey Lake. Thi5 gravel bar is an exceptivnally weli preserued geolagical feature and is one of the most remarkably perfeGt exampCes of its form knavvn (Weissenborn, U5G5). The gravel bar is IocatEd adjacent on the south ta the ,praject srte in Rotchford Acre Tracts. Ratchfarai C]rirre runs down the center of the graVel bar. SMeeley Lake is most likely perched, meaning that it probably sits an tvp of the Latah cfay layer (Guaick, DN R), sepa rating Shelley Lakef rom direct cvntact with the Spokane aquifer. The Iake may be fed by underground sprungs between this Latah clay formation and fload deposits. Since Saltese Creek is nvt year-rvundf th►e lake wfluld mvst Iikely dry up c❑mplete'!y if it's nat also spring fed (Lyerla, []Of). 1IVater table cvntaurs fvr the 5pvkane aqui#er indicaCe that beneath the prvject site the aquifer Ms Itacated at appraxirnately 1,945 feet an eleWatian, with 400 to SQii feet of 5helley Lake EIS 22 Ocrober 1993 saturated thickness (USGS Water-Supply Paper 2265). In additivn 21 well IDgs were revAewed within a two mile area surrQUnding_ the prmject site. The average static water Ievel far these wells was 1,941.5 feet in elevatirort. INith the fake bottom elevation approximated at 1,984 feet, there is approximate4y 39 t❑ 42.5 feet of separatinn between the battom of Sheiley Lake and' the top of the S,pakane aquifer. 5helley Lake is fed 5y Saltese Creek which serVes ta drain a vvatershed area of approxirr►atefy 22 square mides lying south and east of the lake. ~Most ❑f the tributaries ❑f SaItese and (3uinnamase Creeks flow thraugh rolling agricuitural land with sCattered residences on large parcels. These tv►ro creeks evnWerge at what was vnce the southern extension of 5altese Lake. This 1,500 acre iake was drained privr to 1910 afld i5 r10W CBIIed SaIteSe FIatS. ACCC3rdlf1g tQ LBkeS of WaSF1fG10tOf1, (Water Supply Bulletin Na. 14; 1$64), abaut 50 acres of intermittent marsFr remains at the north end of the lake bed. - Three drainage caraals run northwest t❑ sautheast through 5aitese Flats and water flaw is contralled by irrigatian gates. Qrainage canals run thrvugh arr apprvximately 50 acre arga that is m€ned fvr peat moss. 5altese Creek fl'vws from the north snd of the dra+nage canals narthwest tv Sheilsy Lake. The vvater qualdty of 5helcey Lake has not been analyzed eaccept far a study dane by the Qepartment of Ecofogy in 1974. Resuets of ihat study are documented in Reconrraissance Data on Lakes in Washin4ton - VoIume 7 and are prvvided in Table 1.As previvusly discussed, She6Eey Lake has significantiy decreased in sizs since 1952 when the physical parameters of the lake were estimated and as reflected in Tahle 1. ~However the water quality data prvvided can serVe as a baseline fvr future water quali#y testing. The data prvvided f►om the 1974 study indicates fairly high Ievels of tvtal nitrogen and total phosphorus, low levefs of dl5solved oxygen, and limited visibility. Little vr nvrae of the su►face and shareline is coVered by emersed plants. The law va6ue for shoreline can#iguration suggests a lack of shalCvvv water and protected bays whpch lirnits the lake's capacity for ,plant grvwth, Fecal coli°farm calonies are 1ovv. The high i'evels of tvtal nitrogen and total phasphvrus can be at4rtibuted to the feed It3t that was then I'vcated an the north sicie of the Iake and incoming irrigatian water cantaining fertiligers and pesticides. There is na current infarmation availabie on the water quality of 5he14ey Lake. Hawever Vis ual abservations substantiate the lack of macrvphy4es (rvoted and flvating aquatic plants) and limdted water ►risibility. Feed lat use stopped in the mid 1970`s, hawever irrigation run-aff #rom agricuGtural uses in the Saltese Flats area cnntinues. ❑ueing May and June the lake contained large amounts of arganic particulate matter and was a tea-like hrown in co7a►. This is proba'bfy due to the anflvw of peat moss seduments caused by Saltese Creek filowing thraugh #he peat rrainvng ❑perativn in the Saltese F6ats. 8rowra caloratian is common in vrrater with Iow dissvlded axygen levels due to the appeararace ❑f iran and manganese. Current property owners stated that Sirelfey Lake EIS 23 Ocrober 1993 TABLE 1 Waterr Quali4y Data SHELLEY LAKE SP{]KANE CDUNTY LATITUDE 47¢30t59" LONGITL1f}E 117¢10956" T25N-R44E°24 5Pt3K4NE RTV£R BASIN RH'PSICAL UkTA CUL7i1RAL DAFA S?RA[NAGE ARER 50 Ml RESTOENTIALDEVELQPMEN? 2% ' ALTITUaE 2+725. FT LArCE AREA 37. ACFaES NUMBER flF NEARSHdFtE NpPiES Y LAIeE VqLUME 710. ACRE-FT MEAN QEP7H 14. FT LAN❑ U5E IM ❑FtAINAGE 8A5IN , MAk IMUM bEPTH 41. F7 5Hi1fiELfPIE LEtdGTH 1.7 MI NQT pfTEFiMiNfD SHQRELINE CONFFGURATION P.+} DEVELOPM£NT DF YQLUMe 0.47 - RDTTQM 5LC]PE 2.9 % BASIN GEOLOCatl IGNEf]i15 TMFLnW tvaNE VISI8LE []UTFL,UW CHANNEL p85FnlT PUBLIC BO4T RCCESS T❑ LAFCE WATER-QLfALITY f}ATA (EN MG/L iJNLE55 OTHERWISE INpICAT€D) SAMPLE SITE 1 ❑4rtE 6/213174 • TIMF 910 915 QEPTH {FT) 3. 23. TOTAL MITRA7E (N) 0.02 0.44 TOTAL NTTRITE iN1 0.43 0,41 TOTAL AMMONI4 (N) 0015 0.10 TOTAL 0€tGANTC NITRpGEN (N) 0.85 (].63 TOTAL PHQ5Pkt4Rl15 (P) 0.072 0.067 TOTAL DRTH4?FH05RHATE tP? 0.020 0.052 SPECIFIC CONf7UCTANCE tMICROMFi0S1 120 130 WA FEFk TENPERATUFtE I DEG C 1 1961 9.2 CpLpR (RLATINt1M-GCf$ALT tJNITS) 50 50 SECCWT-[]I5C Y35IPILIFT fFF1 3 CYIS50LYED OxYGEN $.0 0.3 LAKE $HORELINE COVEREO BY EMERSE❑ PLANTS LITTLE 4R N4NE LAKE SGtRFACE CaVEREQ BY EMERSED PLANTS NONE OR cl % oarE $rzs/74 - 7IME 925 wUH6ER DF FECAL COLIFORM SAMSLE5 3 FECAL COLIFORM* wINIMl1M SC17L./100HL,p 2 FECAL COLIFpRM• MAitIwLlAS (COt./100ML) 7 FEGAL CDLIFdRM. hfEAN iCRL./Iif(1ML1 5 REMkRrSS THE aLGAL OENSITY kAS MDQfRATELY HIGH BUT NO AaUATIC HACRQPHI'TE5 WERE OBSERYED. THERE I5 A FEED LOT DM TH£ NOR1'H SIQE ❑F THE LAKE. ThFE LAKE RECE I VE5 IF7R I64T 3 DN WAFER I MPC1RTEo FROH UUTS i DE THE NATURAL f1RA dNAGE AREA. S[]ll'FCg: Wa5h111gtof1 StBte Department of ECAlDgyr R$COnf18l55af1GP [7ata on Lakes in Washingtan-VoiuRne 7 (Water Supply Bulletin - 43, Vvlume 7); 1976 She!!ey Lake EIS 24 (3ctaber 1993 there is an abundance of algae every year during late summer. Algal blooms are typically caused by high levels of nitrogen and phosphorus. According to the State Water Pollution Control regulations (Chapter 90.48 RCW), the discharge of any organic or inorganic polluting matter into state waters is prohibited. The regulations define pollution as follows: "Contamination, or other alteration of the physical, chemical, or biological properties of any waters of the state, including change in temperature, taste, color, turbidity, or odor of the waters, or such discharge of any liquid, gaseous, solid, radioactive, or other substance into any waters of the state as will or is likely to create a nuisance or render such waters harmful, detrimental, or injurious to the public health, safety or welfare, or to domestic, commercial, industrial, agricultural, recreational or other legitimate beneficial uses, or to livestock, wild animals, birds, fish, or other aquatic life." The Water Quality Standards for Surface Waters regulations (Chapter 173-201 A WAC) establish state standards for water quality and implement the Water Pollution Control Act. These regulations mandate that activities which contribute to pollution be conducted using best management practices to prevent violation of water quality criteria, in accordance with Department of Ecology directives. Lake ecosystems are complex and highly interconnected. In-lake plant production usually forms the organic matter base of the lake's food web, and most lakes require a reliable level of algal and macrophyte production to maintain productive food webs (The Lake and Reservoir Restoration Guidance Manual, 1990). Healthy lakes have a food web that involves the flow of energy among the lake organisms and the recycling of nutrients. The process of photosynthesis by aquatic plants produces oxygen, which is the primary source of dissolved oxygen in water. Oxygen is required to sustain fish populations and is required to completely break down organic matter. During the respiration process, the bacteria that decomposes organic matter consumes oxygen and releases carbon dioxide, water, and energy. When incoming water is high in organic matter, the bacteria can consume the lake's dissolved oxygen supply more quickly than it can be replenished. This can lead to fish kills, odors, and noxious conditions, and is most likely a major contributing factor to the water quality limitations of Shelley Lake. The process of photosynthesis requires light, so plant production is restricted to the upper portion of the water column. Submergent plants will grow profusely only where underwater illumination is sufficient. Steep-sided lakes support a much smaller development of macrophytes because the bottom sediments are too dark or too deep. In addition, when bottom sediments are highly inorganic (sand), macrophyte growth may be poor because it is difficult for roots to obtain nutrients in this sediment type. Also wide seasonal water level fluctuations can prevent the establishment of rooted aquatic plants who cannot tolerate the dry conditions created when the water level drops. Shelley Lake's fairly steep sides, soil types, limited visibility, and high degree Shel%y Lake ElS 25 • October 1993 of water IeVel fluctuations have ali cantributed #v F#s lack of aquatic vegetation. b. Signiticant Impacts The cucrent water qvality of Shelley Lake has been degradsd by up-stream and passibly on-si#e agricultural practices. 5vil additkves such as fertilizers and pesticides , have artificially increased nitrvgen and phosphQrus IeVeEs within the 6ake. Peat mining apsratians in the Saltese Flats have added substantially tv vrganic par#iculate matter inflow. 'f]ecvmpusition of this organic matter has depleted dissol'ved axygen supplies. Without Qxygen the decompasitian pracess is anly partially completed, creating anaerobic canditions wnich have led to fish kil@s, reduced visibility, and odcars, ' The addition ❑f irnperaious surfaces tv the currently un~evelo,ped site wilP change the directivn and speed ❑fi movement of on-site surface water. Also if not nnanaged properly the remvva l of vegetation and disruption of soiI during cvnstructio n cauld add tm the amoun4 of cnntaminates and sediment reaching the lake. C. Mtitrgating Measures _ The proposed prvject wi91 decrease the mouement of surface water across the site and reduce the arnaunt of run-off reaching 5helley Lake. This wiCP be achieved through ~ design parameters which estahlish setbacks that maximize the drstance of storm water traveI fram d eVeloped pvrti ans of the site tv 5he66ey Lake and the Saltese Cree k streambed. plso vegefative buffers and retentian pvnds wial slow vr contain excessive run-vff and a storm water management plan wilf be designed to divert storm vvater away fram ❑r around critical features such as steep slopes, unstable svils, vr valued habitat areas. See sectivn 1.2 for mare discussion of irnpacts and mitigatians relating ta soils and run-vff. The proposed praject will limit apatent[al water quality hazard by prahibiting or restr8cting animal keeping. Large animal-keeping wial nvt be allawed within the proposed PUa. The pro,posed ,project irrtends to protec# sensitive areas from hunnan and residential developmenfi encrvachment by providing a aQ foat buffer around the shoreline of Shelley Lake and Saltese Greek. 51noreline and wetCand areas will be protected and restricted frvm any future development. Efforts to mitigate eurrently existing degradatian ❑f S'helley Lake's water quality are arso possible as part of this project. Prafessional wa#er quality sampling and testing would nsed ta be compEeted privr tv initiating potential lake management techniques. Future water qualityJquantity iccaprorrement programs r►vould be at the direction of the Shelley Lake Homeowner's Assvciation. The aepartment of Ecolagy was no#ified in August 1993 regarding the dake's existing vvater quaiity and wi!l assist in analyzing pvtent+al upstream pallution saurces. Best Shelley Lake E15 26 acrvber 1993 manageenent practices vvill be implemented at any identified source t❑ remove cvntaminates from the streambed. ►4 sediment filtratifln system could alsa kae established in Saftese Creek to remove the organic par#icurate matter from the water before it reaches the Iake. These effcarts wauld reduce the depletian of dissalVed oxygen and imprAve water visibility and clarity, impraving valuable aquatic plant praduction, reducing odvrs, and impro►►ing conditions far Viable iisheries pvpulations. Anvther management technique typicalEy vsed to increase the dissolwed oxygen cantent of lakes is aeration ar artificiaf circulatiora. fihis technique eliminates thermal stratificativn thraugh the injectian af campressed a+r fram a pipe vr diffuser at the lake's bottgm. Naxious algal bloams are alsv cantrvlled by increasing dissaEVed axygen leuels in the water calumn. _ Maintaining a stable water level throughout the year would create an envirflnmen# for ' the establishment of emergent and submergent aquatic plants. Increased plant - productiVity wauld also increase levefs of dissvCved oxygen through the praeess vf photosynxhesis. Ilflaintaining adequate arad stable water IeVels could passibly occur by increasing in#Iow frarn Saltese Creek during the dry sumrner months or pumping addit+onal water dnta the aake. Increasing the inflaw tv 5helley Lake from 5aitese Creek wauld require nbtaGning a surface waCer right from the Department vf Ecology. Application cauld be made fnr recreatianal, +wildlife habitat, ar aestMetic use and would take approximately Qne and nne-haEf years tv corr4pfete. During that time Ecvlvgy would detsrmine if: • the request is detrimentai t❑ existing water rights ~ additianal surface water Gs avai[able far use, and •goanting the request would be in the publac interest. Due to the existing agriculturaf use and limited supply tfuring the dry summer months when additional vriater would be needed in Shelley Lake, there probably is rrvt any excess water aVailable En the Saltese Creek drainage (Farmer, DC]E). Water could be im,ported intv the rake by pumping fram the existing on-site wefG. The well log indicates that this well was canstructed in 1956 and has a yiefd of 700 gallnns per minute (gpm). Property vwners haWe retained a water right far irrigation since the time ❑f well deve[vprnent. However, svme well water needs t❑ be used this season in order to rnaintain the current water right. If wafier is not used wc#hin a five year periad, the water right re►rerts back to the atate. An appiicativn for a ehange in use ta recreation wvuld need to be approved in order to pump water from the well intv the lake. The current water right vnty applies thraughvut the irrigativn season, whech would earrespvnd to the seas❑nal need for additionai water in Shelley Lake. A weii yielding 700 gpm could supply appraximately 1,129 acre-feet vf w,ater per year if pumped cvntinuously thraughaut the entire year. As previvusly discussed, at the lake"s vrdinary high water elevatian it has asurface area of 21 acres and a voaume Qf Shelley Lake E!S 27 October 1993 apprvximatesy 231 acre-feet. Assuming an eight foot drop in the water IeveE fram high water in early June to the Iowest estimated fevel in IaCe summer, results in the lass vf apprvximateEy 168 acre-fee# v# water. Therefore it can be estimated that the _ on-site well would need to yield approxEmately 208 gpm pumpVrrg oVer six months ❑f the year to replace water lost to infil#ratian and eVaparativn. !f add+tional water is required for unly four rraonths, then the well wvuld need to pump at a rate ❑f appraxinnateiy 312 gpm. These pump rates are estamates only and da rrot take into account varying evaporation rates due t❑ seasonal influences and hydraulic head' pressure changes due to fluctuating water volumes. Withdrawal ❑f ground r►vater coulcf patentially irnpact gr❑und water IeVels, hawever the pumping rates that may be required by this ,prnject are substantially less than the 700 gpr,n rate that was previvusCy permitted for irrigation u5e. Therefore applicatian vf this management technkque would haVe less of an impact on ground water supply IeVels than formerly perrraitted. In additivn rrruch of the water supplied, other than that last to erraparatian, wauld infiltrate arad recharge grQund water suppaies. ' 1.2 Run-Ofii'f14bsorption - a. Affected EnVironment Run-offlabsorptian rates are influenced by bvth tapography and soil type. The topagraphy of the project site varies frvm gently rolling at the sauthernmost and narthernmost p❑rtions to steep sfopes alang the lake frontage arad along the east bQUndary. The praject site's mast prominent feature is Shelley Lake which is bardered by the pro,posed plat vn all but the east side. Shelley Lake acts as a natural sump area for seasmnal flvws from 5altese Creek, v►rnich drains a basin to the east and south of approximately 22 square mi9es. Since 5hefley Lake has no natutal vutfet, ak'I stvrm water which enters the lake is dispased ❑f through percolativn and evaporation. The 124 acre project site is lvcated wbthin the Garrison-Marble-SpringdaCe sail assvGiatian acGOrding to the Generai 5vil Map of Spokane County, Washingtan (US Qepartment of Agriculture Svil CvnserVation Service, Sail Survev of Soakane Count►,L Washinatan, 1968). This associatian is made up ofi samev+rhat excessidely drained and excessiVely drained sandy and grauelly soils formed in glacial vutwash. The prvject swte contains five distinct sail mapping units (GgA, Gg6, Gmg, StC, and SuE) within the Garrisan and Spokane series and an abandoned gra►rel pit area. As shawn on Figure fi, the majvcity vf the site cnnsists af Garrison series soils represented by Garrisvn graveliy Ioams (GgA and GgB) and Garrisvn very gravelly laam (GmB). The Garrison series is made up afi samewhat excessively drained, gravelly or stany sQRls dhat formed vnder grass in g9acial vutwash mixed in the upper part v►►ith ►►olcanic ash. Shelley iake E15 28 Octaber 1993 The Spokane series Es represented by Spokarre Very racky complex (St+G) and Spakane extremely rvcky cvmplex (SuE). The Spakane series cansists of weli-drained soils that have a sandy substratum underlain by bedrock at a depth of 20 to 60 inches. These soils formed in weathered granite ar thin de;pasits of glacial till oWerlying granite, under cvni#ers and grass. These sails are Ivcated along and to the east of the eastern shore ❑f Shelley Lake. ►4 small outcrop of Spvkane very rvcky camplex is Ivcated in the _ svuthern portiorr of the project site. Figure 6 shows a gravel pi# area lacated along the Lake's narthern shareline within the praject site. The presence of a gravel pit at this Ivcatron is nat evidenced by vn-site abservatians. A second grawel pit is Iocate+d adjacent ta the nartheastern site , bvundary. Other than the Saltese Creek watershed, the proposed prvject site does nat contain any major drainage craurses. F3un-aff within the site is presently disposed of by natural means. Snov+r melt arrd stvrrn water is generally a4sorbed by the permeable so+ls found within the area when the graund is not frozen. ' b. Significant Impacts The proposed prvject carasists of the deveGopment of 46[] residential units, including 196 attached residences, 68 marrufactured hnmes, and 196 singfe-family resEdences araund SheErey Lake. Rvads wiil be canstructed tv access the multi-family area and individual Nots. The characteri54ics of the sail5 in the area fac#vr intv Che carrydng, capacity of the site tQ determine its suitability fvr the construction of residences and roads. Tab1e 2outlines the characterislics of the saii types #ound on-s4te. The addEtian of a built enuironmen# has the pvtential to intensify the amaunt of run-off and sediment Ioading reaching Saltese Creek and Shelley Lake. The addition of impervivus surfaces tv the site through the constructivn of Yromes, driveways, and raads will result in the iraah+lity of water to be absorbed in the preViausly undevelaped areas. The irnperuivus surfaces w+li create an enrrironment weth a large volume of run- off that will neetl ta be diderted and managed an-site in a storm water system. Any accumuQated rura-of#, if d'+rected vver a steep slaping area, will accelerate and increass its pvtentiaf t❑ carry sediments arrd other particles. Along with the sncreased risk ❑f erosion, there cauld be the pvssibility of irrcising the existang drainageavays by the sncreased vo6ume of discharge they must accommodate. AEI of #hese facrors need t❑ be taken int❑ cnnsiderat[on in engineering a storm water management plan for the development. Development of the project site will alter Che existing run-aff characteristics. Urban pollutants wikl be picked up and travel with the excess run-off. Using respansible mitigation measures, the excess run-off shou1d be able tv be managed in a way that wiGC nat significantiy impaet the surrounding environrnent. Shelley iake EIS 29 Octo6er 1993 , i r.aBeE a SO![S +CH►4RACTERiSTICS ~ " , . " , ` c .ay ,IIL~,4T~f~ • , h vL(1AU-~~^. , . -5 , < ' a •y PERCEN7;' EffOS1ON , ^ ry F" ; " ? ' H~LIJ1MGs ySH~d1R> } .YCARRYIIVG 1iGFifCU! 1'UM1C ,M,4PPIIVC3 UN1T SLOPE. ' POTENTISIL PFRME481E1'iY Rt1AkCfFF,.= ~G'4R.4GlTY•;` ,~$STRF►VGTN c4P~4CITY STABII.ITY,. s, ~I~A6l11TY GgA 0-5 Slight Mader$tely Slow Modereta 4-Eigh High Moderate Ille-2 {Ivwl rapid ta low GgB 5-20 Shght Moderate to 51ow Moderate High Hagh Moderate IVe-5 Clnswl very rapid tu law GmB 0-8 Moderate Moderate to Medivm Moderate High High Moderata IVO-5 Ilowp very rapid ta Caw StC 20-70 Moderate tv Moderate Madium Moderate Lowr High Law Vlls-2 lvery severa to Paw rocky} SuE 0-30 Moderate Moderate ta Medium Moderate Law Fligh Low Vlla-2 (very repid tv Iow rockq) Snurce: U5 Departrnant af Agncuftura Sod Consarvatian 5emce, Sail Survev of $uo'karsa Caunri. WashinGton; 1968 5hefley take ElS 30 [7cto6er 1993 Run-aff from deVeloped areas picks up varivus contaminants as it passes over paaed surfaces, raaftaps, and landscaped areas. Contaminant svurces and types may include: r 'VehicMes - lukrricants, hydraulic ffuids, covlants, rubber from tires, dirt carried an undercarriages and fenders, wearing vehicle cvmpdnerats, fuel residue, particulate exhaust emissivns, brakQ and clutch lining materials • Paving surface material - asphalt and its decampvsitian prvducts, ' Portland cement, aggrega#es, road marking paint, expansian joint compounds, and crack fillers , • Atmospheric falfaut - deposited airbarne materials • Run-off from adjacent area - silt, ieaves, grass clippings, soil stabilrzers, , growth cQntrvl campaunds _ ■ Litter - tcabacco and vther miscellaneaus items , • Spills - oil, gasoline, chemicab, etc. i 1ce control campounds - salt and additives • Fertiiizers, herbicides, and pesticides. c. Mitigating Measures The proptised prvject site does nat contain any majvr drairaage courses besides the SaItese Creek watershed. The ten-year design stornn run-qff from lvcafized mn-site basins will he dispvsed ❑f using "2018° grass percvlativn areas and drywel6s in accordance with the Spo'kane Gounty GuidePines for 5tormwater hilarrauement. The sviis on the prvject 5ite are campatib9e with the use vf dryr►velis and grassy swaGes. The variable topography of the site will iikely resu9t in a Variety vf inethods to capture and dispQSe ❑f run-off from the rraadway imperviaus surfaces in prder to prouide "20$" swale areas which are acceptab1e from the standpoints ❑f cvnstructahilityr maintenance, and aesthetics. SQii and surface disruption can be minimized hy sensitive environmental siCe design and planning. This is especially true for develvprnents alvng shorelines ar vn stee,p s9opes. The project site has been designed so that construction activities are locatsd on relative ly flat srapes. Appropriate setbacks and rete ntian of natu eal ue getatian will be maintained where passibte. An erosican control p6an will be required by the County Engineers prior ta begiraning canstructian. L]nce the construction phase is completed within a particu9ar area, the soils will be recantvured and vegetation planted to stabilize the surface sail. This wouWd be crucbal an cut and fil6 slopes where svils wvuld be expased to ervsion arrd run-aff. All direc# run-offi from the development will he isolated from the aake. This vvill be accomplished with the use of grassy swales,cvnstructed uphill of the trail access. A typical sectian depicting the access trail and grassy svaale canfigurativn is shmwn in ,Shelley Lake E15 31 Ocrober 1993 ,4ppendix A. The lake will be protected during canstructian through the use of femporary erasEVn cvntral measures including silt fences and after construction by reseeding excaVated and other disiurbed surfaces. , 1.3 Flvods a. Affected Ero+uirannnent TMe Spokane regiontypically experiences both spring snowmeft and winter rain flavds. _ Spring fdaads are caused by snvwmelt run-aff from higher elevation ►rvatersheds and are influenced by the amaunt ❑f snawpack, temperatures, and the timing vf heady rair►s during the critical snawmelting period. Winter rain flvvds are the result ❑f warm temperatures and heavy rainfall, frvzen soil conditions, and snawmelts producing shvrt-duratian, intense run-aff. Shelly Lake and the Saltese Creek drainage west of the Steen Rmad bridge are Iocated within the "4Jn-numbered A Zone" flood zone area according ta the Federal Emergeney , Marragement Agency (FEMA) map attached as Figure This designativn means that a detailed study has nmt been cvmpseted for the lake to esfiah9ash the 1' OQ-year flood elevatiQn. The 100-year flood plain eleVatian is defined as the water surface efeVatian that wouid have a statistical probability of ❑ne percent of accvrring in any giVen year. A 100-year #Ivad plain eleVatian af 2027 (USCS Datum) has been established at the Steen Raad aridge, which is Iocated upstream and to the ea5t caf Shelly Lake. F'roperty owners adjace nt ta thE prvject site haVe reportea prahlems with flvcading in the area in the past. In additian, Spokane County Engineers files show that during a 1948 chinvak eVent, Shelley Lake aVerflawed and was abserved flawing across Sulaivan and Cvnklin RQads. Hawever a drainage channel leading to the Spvkane CountylSheliy Lake Gravel Pit, raortheast vf the project site, current6y acts as an emergency vverflaw fior Saltese Creek and Shelley Lake. Thvs channef appears tv be mvstfy Qf natural ❑rigin, hawewer a ne►ivspaper art€cle indicates that it may be at least partiakly man-made. This unrefecenced newspaper article is qumted as fallows: "Rem e r17'bBrir7'g. . . Back in May, 1948 a quick thinkirag Caunty C❑mmissioner and a bulldozer aperatQf solaed abig floading prvbaerra. Water fcom the drained SaJtese Lake bed surged several feet deep acrvss three County roads and several S,pakane Vafley farms. The water fu9led 5helley Lake and floaded out antv surrounding farms and across County roads. When Commissivraer Raymond saw the destruction, he suggested bulldozing a ditch across a narrvw ridge ofi land raortheast Qf She6ley Lake t❑ drain the flood water iro#p an aGandaned gravel pit. In a few haurs the ditch was campleted, and #he flood water pl'unged intg the pit and down through the gravel bottom tm the aquifer. The following day County Engineer C. J. Chaffins, told a Ivcal newspaper, ,,...we have a small river running 6n there, and it's still going down as fast as it pours in." {Than'ks 5helley Lake EIS 32 C]ctaber 1993 to aaris and Millar Mnrr6son for this glimpse o# history.)" ' Because af the nature vf the gravel pit`s sails and the fact that the topsail has been remvved, the gradel pit is capable ❑f tremendaus percaGation rates estima#ed at 500 inches per hour. Nv damage to private property and public roads has been reperted irt the area foIlvwing canstructivn vf this flvodwatsr averflvw Qutlet. b. 5ignificant Impacts The 140-year flood plain e Eevat+on ❑f 202 7 esta bl ished far SaEtese Creek at I he Steer+ Road bridge is praposed as a safe eCevation in arder to estabEish miniEnum finished ' floo-r e IeVativns for lots adjacent to Shelley Lake. All finished f IQVr eleVativns will be at elevatiort 2028 or higher. fihe ❑nly kauiCding lots which lie within the 2027 elevativn cvntour are Lots 33 thraugh 36 in glvck 1(see Figure 3). ' c. INlitigating Measures The 5pokane Gounty Engineers ha►re indicated that the 2027 fiaod plain elevation propvsed will be adequate as long as the existing overflow to the gravel pit is maintained (SEB Appendix B). The drainage channel and graVel pit shvuld be preserved to proVide a rnargin af safety far contralleng floodvvaters. The praject proponent has agreed to take the necessary s#eps to secure this ❑uerflow ou#let for the future as required by the Courrty Engineers. These st~~s may include acquiring dra+nage easements, quantifying potential overflvw ffvvdwaters, and construction impravements requiredtv the drainage ditch to adequately pass overflow flaadwaters. All lots that harre aand beevw elevativn 2028 (one fovt abave flood elevatiorr) wiii be required to ❑btain floodplain development permits prior to devefopment vf the pat. Shelfey teke EIS 33 Octaber 1993 _i I , 4' 40 41 , 35 ~ 3n av 10 l 6 - iO ' IQ ~ ~ SFSELLEY LAKE - SPDKANE C[)LINTY t 25 TI - R 44 E- Stc 79 37.4 Sur(ote Acrai Surv. 72 Frb. 1431-Stols Dapt ef Gome • ynluma--706 Rare FaH 0 IDOrJ' I fGAtE IH 148T S{3UFiCE; WALCOTT. EARNEST E., LAhCES (1F WA5HINGTON, WA STATE DEPARTMENT QF CONSERYATION, WA7ER SURPLY BULLETIIV N(3. 14: 1964 DATE. OCTDBER I993 p 5C14L'E: IVCINE A . FICUFiE NO: PRWEGT NO : 92-032 LAKE 6aTTO11A CDNTQURS 5 SHELLEY iL~lKE PR~~IMINARY RL1D PLAT 'Rm~ ~~'~'oc~'a'"~Fj', ffnc' ENVIROfVMENTAL IMPACT 5TATEMENT k Eg I % ~+041T L ~ ~ - ] • +~i'f~'rr.r~ S~ }+~y~~~A ~ ~ ' i. : . ~i ~s f' ~y f~ ~•1 y~~t~~~ •~~.'w~'~ ~ ~E J ~~'ar~r • _ (r~ ~ ~ gf~ ~ - • • ~ ~ i~' t• ~ ~ Y.~;. j ~ s a ~~t~~~ ~'P`~~ ~ Sr'ir ~3,•~ ~`~t ~ } J ~~1 ~ •,~y~' ~ `7~,+ i L ~ ~ r~' ~ ' s ~rr •Si ~ ,~y ~i ,~y ~ 'a• 5: Y~ ! ~ ,f~ pf..~ q~~ ~ r •.,~~rt +t ~ _ ~ 1 1~, ~ _ •y ~ ~ ►~Yi'~ II ~ r ~ _ 000 ~ s„~ ' ' ~ ~F*~~ i.t; L• • „ y • ra~iale i , R • p; . , ?~y~, :t', ` 1~ - - tI ~ ~ , . ~ .3 ~,f.'.:~ ~ ■ f ~ o .h~' r~ • r ~ - ~r.~~ =~'~•~tT "fT ~ .~~y ~ r•i •r i ; ~ ~i ;7~ ~ i~. ~°s~ ~ ~-~~kTrrv+~,~.~a r I 4 GEA ~~rriwaux~~ ~ sr PnuL ~ .nnr~a n . .8v .arri' - •.~F ~ ' VL) ~LSi11L . rF,.' • r 9 }y • IJ . Tc,+.~ • F ` li ~ r' ~ r • ~~iF ~ .~l~'7 ~ i ~ ,'t? ti' y I! P ° z OBR rd e ~ . ~ , ~5r~ ° • ~ - ~ ~ .~i]cC G gA p~ i 1 • t~~,~ I !d~ 6 B C~II CkC . NCG'nB CL'IlIt.YI Vil 24 ~6A , • • i~ r~ S~~]tc~r'~~lj~ GmB . ~'F r PcA`4'` . r , Ll ~FSA • a .,t3,~ S. • _Y Y , ~ V N E 'pc - _ • SITE Gee ~ ~ ' Ico~ kta f FISB We Gm6 H5B BsE3 _ IJhB F'sA La8 Bs$ , I PsFI H.G LaE3 PsR gy¢' ~ Whe ' Cn'8 •~'tjG, •-Y SI[C. COB ' YI ■ , . GgA*, + ~~g ~F3i9 ti,~Ct~.,}. !1 ~ BS~ - - ' Ba~ , ~ • i.; - ~ H113 4tII C .,c1 ~ • ~ ~'.,~3 B- - . F' . HhtY r r - &B • a, ti d , l .CaB~• ' . ~,uZC~•-~'~, di 65B , GgA 1 R • - ~ ~ _ ~ ;r ~i , y' LEfBEH[3: ~SuE QQA Garr[enn grevallp Eoam. 0 trr 5 percant elapaa • , . C3gH i3arrison gravelfy loem, 5 to 20 percant elopeB GM8 Garrison rery grarelly IQem, t? to 8 percent sIvpes + - ,,yo: - ~ - StC Spokane very rocky campl$x. 0 to 30 percent slapea u• u •..5tC 'Spc' ~ SuE Spekane eztremefy roeky compeex. 20 to 70 percent sio,pea ~s G+r~[3 II ~ - , . . 6011RCE: SPQICCANE C4UNTM 8L]fL S1IRHEY MiANl1AL • DATE: OCTOBER 1993 I&CALE: NOA[E FIGURE N[!: PRaJEer No.: 92-032 SdILS MAP 6 SHELLEY LAI(E PRELIN11NAFtY PUD PLAT ~~~odate__ti EMViRQNMfHTAL IMPACT STATEMENF - I • ~ ~.~r~or~ ~ ,.«.~r I • ~ ~ . I ! a ~ [l ~ ..o _ _ 4T1-1 flnte 0 .fl.g 0--f o L orie+cm ~ sruar `L ZO-IE A. Q 1 ~ ,f x ¢ ~ ~ ~ ~'7 ~ ZOhEC C ` ~ I~ SITE II ri AVE St}URCE; FEMA iFLOQp INSURANCE RATE IWAF' PAfVEL 314 IQATE: OCTOBER 1993 I SCALE IY[}NE FdGURE NC?• PitbJEGT NCD : 92-4332 p ~ FEMA FLQ(3D HAZARD MAP 7 ~j SHECLEY LPIKE RRELIMINARY PUa P~LAT ~Gx.1y117~ C~T~.~t7CGttL~E~,.l ~i2.C. ENYIRONMENTAL 'IMPACT STATEMEIVT 2.0 PLANTs ►~~D ANIMALs 2.9 Ha6itat For and Numher and Diuersity of Species of Plants. Fish vr OtFrer Wvldlife a. Af#ected Enviranrreent The project site contains several types of distinct plant cvmmuntties including grassiand, pvndervsa pine forest, riparianlwvetlands, and shrubs. The majarity of ihe site (apprvximately 80 acres) 6s cultevated fieEds that are currently used for the - prnductivn of hay. The existing piant communities and field edges provide a Variety of food, cover, and breeding habitats for wildlife at the si1e. Fiowever, extensive - cattle grazing down ta the water's edge has significantly disrupted the natural , vegetation and eliminated mvst of tPoe high value native habitat alvng the lake's , shoreline. The Spokane Cvu n#y Sail Survey indicates the potential vegetatian of the develvpmerrt site to be primarily bunchgrasses, daminated by bluebunch wheatgrass and Idaho fiescue. C}ther grasses w4uld be Sandberg hluegrass, bvttlebrush squirreltail, prairie junegrass, anti CaCurnbia needlegrass. Forbes cvmprise a Iesser portion of the site and may include biscuitrvvt, huckwheat, lupine, lomatium, arrnwleaf balsamroot, sticky geranaum, astragalus, cinauefoil, lar'kspurf yarrQw, and phlox. Native shrubs and trees vuhich could kre expected to occur would be distributed in small, scattered clumps and rnay inc{ude snowberry, Rosa woradsti and R. nutkana, chokecherry, serviceberry, birchleaf spirea, mockarange, and pondervsa pine. Wetland areas afong ihe lake's eastern shoreline cou1d be expected ta suppart a wider variety of woody species including quaking aspen, willows, cottvnwoads, Doug9as hawtharne, elderberry, and red-stem ciogwavd. Cultivated fieFds are located narth, west, and svuth of the lake (see Figure The northern and western iake edges and the area surraunding ihe abandaned rneat packing buolding cvnsi5t of a mixture of weed5, grasses, and a few shrubs. These areas extend frvm the cultiuated field edges dvwnslvpe tv beiow the lake's prdinary high water IeVeE. The majority of the vegetatian in this area consists of kraapweed, an extremely undesirable ►rveed that is difficult tv cantcol. Varivus grasses, perennial fvrbes including birdQCk, mullen, rnustard, and toadfiax, and a iew srrtiall scattered shrubs are aEso fvund' in this area. Severah fir trees are located north ❑f the +existing Rice residence that are more than 65 years ❑9d. Six deeiduvus trees are alsm Ivcated west of the a6andoned meat packing building. Vaeious small rodents and insects are supparted byr this vegetatiVe area, hvweuer these areas are of reeatively 8ow value due to the h i g h amount of knapweed re lati►re to existing natural Vegetati vn, The extensive presence of knapweed iru this area of the site can probably be attributed ta its past use for antensiVe cattle grazing. The grass[and areas of the site are lacated along the 5altese Creek drainage and extend svuth of the creek into a seasonaf finod plain area. These areas consist mastly 5helley Lake E!S 37 October 1993 of higher vatue rtative grasses and sedges along the stream bed area. A smaller grassland area is lvcated alang the westerrr shoreline of the sauthern extensivn of the lake, and extends up a gentCe slope to the cu6tidated iteld area. Granivores (seed eating anirnais) and grazing herhivores such as radents and insect5 are typically supported by this type of habitat. Grassland areas may also be used for huntfng by predators such as hawks and coyote. The bluff direct9y east of the lake suppvrts a,pvnderflsa pine uegetative community that extends nveth tv a gravel pit Itacated northeast of the praject site arad south to the Saltese Creek drainage. Steep slvpes and rocky areas also support natir►e bunch grasses, perennial forbes, and small shruhs. This habitat supports a variety of birds, small madmrroaas, and occasionally deer by prouAding cvver, breeding, and feeding areas. An area of mvstCy native shrubs is located sauth and west of the southeas#erly extension of the lake. This area consists of native shrubs, perennial farbes, and grasses including buckwheat, blanket flowers, lupines, yarrow, arad servwceberry. This hahitat prvvides caver, breeding, and feeding areas frar small rodents, insects, and birds. Three areas of riparian uegetation are Iacated near the kake`s eastern and svuthern edges. A small weiland area extends frmm the lakeshore northeasterly int❑ the blufflponderosa pine wegetatiue cammunity. Nv visible evidence of surface water has been nvted Vn this area, hawever several pvpulus species including willaw and lombardi are Iocated here and southerly along the lake's shvreline. TFIiS 8fea aISD contains s'hruhs including hawthofne and wild rase. A seeond area of riparian popu9u5 species as located along the eastern lake edge, ju5t north of the stream entrance. The third area of riparian vegetatron is IoGated at the tip of the lake's southerrr eact+ension, vvest of the stream entrance. The refatiVely flat sCope and fine grain sail canditivns found here suppart a ►►ariety of sedges, although they are few dn number. The riparianlwetiand vegetative areas support nesting and feeding appartunities for a variety of birds, small mammals, and aquatic insects. IrI(]WeVeP, these areas are fairGy fim6tetl in size and species dVVersity. The Washingtan State Department of Natural Aesources was contacted regarding informatian mn significant natural features in the project area. A search of their data base did nat reveal any recards of state er+daragered, threatened, or sensitive plants ar high quality native plant commuraities and wetiands. The follawing species of birds, animals, and fish or edidence of their presence were observed on-site during the course of this study; Ring-neck and cinnamvn tea9 ducks, great blue heron, red tail hawk, pheasant, quai6, flycatchers, lcilldeer, swallvws, rvbins, flickers, kestrels, wren, chickadees, great horned vwl, field mice. Voles, squirrels, rnarmfl4s, turtG'es, skunks, Iarge mauth bass, and perclh. Because of poQr water quafity and extreme vvater leuel fluctuations, Shelley Lake daes I ,Shelley Lake f!S 38 OctQtrer 1993 1 ' ~ not support a significant fish population. There is also an obvious lack of emergent marsh vegetation and therefore no habitat areas are available for nesting waterfowl. The lake does receive use by migrant and resident waterfowl mostly during the seasonal breeding period. Other species that could be associated with the area but were not specifically identified include coyote, badger, ermine, weasel, mink, and deer. Neighborhood sightings on the project site and within the immediate vicinity include hawk, owl, Oregon Junco and Black-capped chickadees, sparrows, robins, magpies, meadowlark, ring-necked pheasant, California quail, hummingbirds, woodpeckers, Wilson's warbler, evening grosbeak, rufous-sided towhee, Canadian geese, squirrels, coyote, deer, marmot, ermine, suspected wolverine, nuthatch, rabbits, frogs, and turtles. The Washington State Department of Wildlife was contacted regarding information on significant natural features, migration routes, and fish populations associated with Shelley Lake and the immediate vicinity. A review of the State's data base did not result in the identification of any species of concern within a one-mile radius of the project site. Their records of fisheries resources only indicated the presence of yellow _ perch within Shelley Lake. b. Significant Impacts The areas of the project site proposed for the development of homes, streets, and associated utilities are located where there are relatively flat slopes which consist mainly of cultivated fields. A soft pedestrian trail will encircle the lake above the ordinary high water mark, and somewhat disrupt the grass and shrub natural habitat areas. Development of these areas will require the removal of knapweed and some native plant species and will likely encroach upon some of the habitat areas used by wildlife. The loss of wildlife habitat resulting from construction and development of the site will be an unavoidable impact for some of the existing wildlife that is unable to successfully relocate. The construction of residences and roadways will completely eliminate all agricultural practices on-site. This will necessitate removal of the associated fringe and stubble areas bordering the fields which provide cover, breeding, and feeding for a variety of birds, insects, and small rodents. Construction of the soft pedesirian trail through grass and shrub habitat areas will also impact these same types of wildlife. Site design has allowed for large expanses of open space to be left undeveloped to accommodate the majority of the existing wildlife. As the site develops over time, wildlife will be forced to move to open space areas or take alternate paths in areas where existing paths and habitat will be removed. Wildlife will be exposed to a greater number of people, their associated activities, and resultant noises due to the influx of residents to the area. Some species may be lost Shelley Lake ElS 39 - October 1993 if they are extremely sensitive and cannot adap# to the changed environment, even thaugh adequate habitat is pravided. Hovvever, the 6arge expanses ❑f apen space provided by site design could accommodate most of the existing wildlife. C. Mytigating Measures The propcased deWeiopment project wi6k designate 36.9 acres as permanent apen 5p8CE, which ineludes the lake and surrounding shoreline, riparEan and wetaand areas, and steep slope areas. This will allvw fvr the preservatian and enhancement of these 5en51tiue areas and the surraurrding environs by cflntralling human cantact and use. Tihe project wauld cvntraC and restrict lar+ge anima#-keeping, herb icidelpestic ides, and - fertilizer use in areas v►rhere run-of# eauld impacC the lake and wetlands. Mvst of ihe undesirable knapwsed alang the lake's north, west, and east sharelines wiil he elirninated. 'V11etland and shoreline areas vvFll be enhanced by plantings of native - grasses and shrubs of high Value to wildiife. The prQposed develapment includes a soft pedestrian traiC on #he slope arQUnd the ,perimeter of the kake. The traiE wilE be lacated arr a sfope within a 50-foot buf#er area +es4ablished betweera the oake's ordinary high water elevatian (as established by the Department of Ecology) and the indiVidual prvperty boundaries near the tap of the slope. ►4 braadcast spray 4Radeoy will he used tv cantrnl knapweed in the areas where it Es most prevalent. It may take two to three years with severaE applicatians per year ta bring the kna,pweed under contrDf. This spray wiEl also eliminate the small amvunt of grasses and forbes rnixed in with the heaVy areas of knapv+reed. In areas of mpstly nati►►e shrubs anti fvrbes with lesser amounts of knapweed, the knapweed wRill be spat sprayed using Rodea in ❑rder to retain the exist4ng high va4ue Vegetativn. Landscaping plans within this area are formueated #o enhance habitat for compatible wifdCife species. The areas cleared of knapweed will be reseeded with Sheep fescue or a mix ❑f draught-tolerant hardy grasses and' forbs with high wi9dlife habitat value. Grass rnixtures v►►ill alsfl include native wildflower seeds. Approximately 20-faot drregularfy-shaped clumps of native ❑r naturalized sFarubs will be planted in these areas, with eonphasis primarily away fram the #rail and other areas subject to high human uselaccess. This wyCi minimize d'+sturbance tv nesting and ioraging songbirds and quail. 5pecies ❑f shrubs and trees to be planted may incGude: • Willvw • Qregon Grape • Cvttonwaod • Red-twag Dogwoad • Hawthorne + Oceanspray • Chvkecherry ■ 'W'ild 5yringa • SerViceberry + Ponderosa Pine • EEderherry + Austrian F'ine + Kinnikinnick • avuglas Fir • Bunchberry 0 Wild Red Cherry • Wild rose • Canadian Red Cherry • Mockorange • Vine Maple Shelley Lake EIS 40 CIcto6er 1993 • Snawberry 0 Raeky Mauntain Maple VVithflut supplemental irrigatian to the antacipated plantings in this area it may be difficult to establ'ish denser p7antings of woady vegetatian thar+ would be expected uncier natural conditions. The svil may not retain enpugh maisture throughaut the summer due to its sandy and graWSlly nature. Hvwever the diuersity of species present may be iracreased hy intraducing drvught taCerarrt species such as smoath sumac, Russian vlive, sand cherry, Tartarin honeysuckle, and Rocky Mountain juniper. These plantings wi61 proVide fovd, cover, and nesting areas far many species of birds, rnderafs, and insects. Nest boxes placed in the apen space corridor alvng the lake's sharelines will proVide increased shelter and nest+ng opportunitie5 far cayity nestang birds. Cattails, setiges, rushes, and similar types of marshy emergent vegetativn may be planted in the wetland area at the la'ke's southern extensian, west of the stream entrance. This will occur anly if the lake's water IeVel can be controlled and maintained and wide water level f4uctuatians are e[iminated. If these types of plantings can be estabiished, i# will proVide nesting and breetling habitat for waterfvwl where nnrae cuerently exists. Standing and fallen dead trees 4snagsf wiEl be ieft undis#urhed in the panderasa pine vegetative community on the bCuff east of t'he lake. The snags provide cavities far cover and nesting that are used by swallows, flickers, kestrels, wrens, chackadees, and woodpeckers. SCanding dead snags Ivcated near the pedestrwan trail may raeed ta be topped off and svme limbs remaved fvr safety reasans i# it is determined that they are a hazard. Minimum landscaping standards will be established in the res#rictiVe cvvenants for Shelley Lalce to ensure timely landscaping of dbsturbed areas. The coVenants will also stipulate that the 1akeside baundary of the residentiaB Ivts bvrdering the apen space - corridar surraunding the lake be landscaped using native Sow shrubs and graund covers (i.e, kinnikinnick) rather than kawns and cu6tivated shrub beds. This wilf praVide a n ap praximateCy 10 to 2-fvQt transition zvnebetween natiue and cultivated plarafing5 antl will help ta stabilizs the slope. Pesticide and fertilizer use would he restriCted vn steeply sloped areas, iimiting their dir~ct run-vtf and impact an ihe lake. The restructive cvvenants will cara°trol domestic animals by requiring them to be penned vr on leashes. Fencing restrictions vvill be appVied tv ensure condnuvus ❑pen spaee corridars. Educativnai materials cvncerning the area's natiVe habitat areas and effarts at enhancement will be displayed at the cvmmunity center andlve disteibuted to each hQmeawner. This will include iratorrnation on the State C3epartment of Wildiife's Backyard Sanctuary Program, r►vhich encourages hvrrievwners to landscape their yards r►vith wildlite hahitat needs in mind. She1ley Lake EiS 41 Oecober 1993 II: 8 Ult T FNV1R ONMfNT 1.8 LANa AND SHDRELINE USE 9.1 Relatianship ta Existing Larad Llse Plans a. Affected Environment The proposed deyefapment site cvnsists mastly of untievelvped apen spaces of IN00d@d SICIpeS, Shefley Lake, and cultwvated fields. A singCe-famify resedence and assvciated vutbuildings is Iocated narth of the Iake at the carner of 4th AVenue and Conklin Raad. An ahandvned meat packing facility, 9'eedfot area, and two barns are located in the nvrtheastern pvrtian of the sF#e. Past land use practice5 cansisted of mostly cattie grazing, agricultural productivn and the sirrgfe-fami0y residenee. TFae residence was part of the oeiginal 900 aere hnrnestead awned by the Sheiley family. The current property owners (Rice) purchased the homesite and lake property in 1953 and cvnstructed the current structure around ►ivhat was just a sheff. ►4dditions to the home were cvmpleted in 1959, 1963, and 1988. The Rice family already owned the meat packing facility and fieed Iot and used the fakeshvre praperty to raise cattle far their meat packing business. The ❑riginal meat packing building was cpnstructed in 1948, wdth additions in 9958 ana 1960. The Rices irr'sgated the pastvre land where the cattle grazed w6th water supplied by an vn-site well. Cattle were removed frvm the praperty during the mid 1970's and the pasture Jand was Ieased to varivus farimers for agricultural (hay) productivn. The Rice's seld the meat packing facility to Kurt Nealy 6n 1985, vvho filed for bankruptcy within faur years. The builddng fell intv disrepair and has since been vandalized several times. The predominant charaeteristics of 4he surrounding area are urban and suburban with rural use east of the prQjeet site. The rnajartty of the prvperty immediately rivest ❑f the site is Qwned by Central Valley High School. D'urectly south of the site Iies ftotchfard Acre Tracts, a subdivisiorr with one acre parcels and single-family residences. Single-family residences and severaf multi-family units are Ivcated afvng 4th Avenue. A mab6le horne park is Ivcated at the northwest cvrner of 4th Avenue anti CvnkJirr Road. North of the project sFte are single-family residences and a manufactured hvme park. The east of the site are iarge acre parcels with scattered residences. The fvllowing land use plans and vrdrnaraces guide devel❑,pment in Spakane County: • Cvmprehensiue Land Use Plan • Zoillllg C(]dB 5he!!ey Lake 'EIS 43 Octn6er 1993 , • Shoreline Master Program The Comprehensive Plan designativns far the praject site are 4Jrban and Suburban{ (see Figure 9). The purpase the 'Urban categary is tv provide the vppartunity far deVelopment of a°CItyIIIICE" environment. Land uses vvithin this category include intensi►re residential development and public fac°rlities and services (vuater, sanitary and storm sewer iines, palice and fire pratection, and ather features). Residential net densities shauld have an approxamate density of vne unit per acre to 17 unats per acre. - The 5uburban( f) categary is intended to pror►ide the oppvrtunGty for development and maintenance of residential areas with large yards and open spaces that allaw limited large animal-keeping. This category os primarily intended fflr residentEal deVelopment and necessary services, and is also intended tv pravide apporturrities far some small neighborhood cvmmercial d'eVeEoprnents which serve adjacent Suburban(+) residential develflprnent. It's primary intent is tv suppvrt and camplement a residential lifestyle with limited animal-keeping on larger than Urban lats. Zhe existing zane classifications for the project site are Urban Residential-3.5 4UR-3.51 and 5uburban Residential-1 (SR-a ) as shown on Figure 10. The IntentiQn o# the UR- 3.5 xane is to implement the lower density range of #he Urban category of the ComprehensiVe Plan by prvrnoting areas of primarily singls-family residentEaV use in an urbanized neighbarh❑od setting. These areas would have a high levei of pvbfic services including public water and central sevver systems when availahre. Roadways must be paVed and curbed arad may have side►►valks. The maximum den5ity permitted in the LJR-3. 5 zane is three and vne-hal# dwelling units per acre. Fivwerrer, bonus density can be earned through applicat`an of the PfJD Qverlay avne bonus density pravPsions. The intention of the SR-i zane is to implement the Sukaurhan ca#egory of the Comprehensive PFarc by having areas of moderate density residentiaE as the primary use and agricultural as a secvndary use. This zane anticlpates a general residential character r►vith ❑nly 1imited agricultural act'svities permitted. Mvst Ivts wifP be served hy public water and may require cannectian to a public sewer system. There are a cvnsiderab!e amount ❑f public faciiities and serVices with an Qpen residential character. The maximum ciensity permitted is ❑ne dwelling unit per acre except with the applicativn of the Pl7D overlay zone bonus density pravisions. The Vllashingtan 5tate Shvrefine Managemen4 ►Act has charged each caunty with i rnple menting its awn pravisivn s for the comprehensive managernent of uses affecting , public waters and acea 200 feet landward from tlae high water mark. In Spokane Cvunty a 5horelines Management Program was advpted January 15, 1975. The prvgram designates shareline management areas in five categories which ,pro►ride the framework fvr impfementing shoreline policies ancf regulatvey measures. A11 of the Sheiley Lake shvreline area vvithin the 5helley Lake Preliminary f'U[] Plat is Shelley take F15 44 Octa6er 1993 currently in the Rural prea Designativn. This area is described as fallQws 6n the Spakane Caun'ty 5horelirre Program: The Rura1 Area Desi n ian The RuraE area is presently used far agricultural, recreatianal and low density suburban types af development, andlor has the ,patential vf becoming prime farmland. The purpose of designating the R'ural Area in Spvkane Gounty is to prvtect agricultural fand #ram urban f:XpaflSki]f1, and to provide #or extensive and interasive recreational uses where these recreational uses do nat cvnflict w8#h agrRcultural practices. This endironment as designated tQ preserve shvre6ines mvst suitable for agricuftural uses and recreational pursuits. Urban and Pow- den5ity subuEbBn expansiQn in the future is nat intended for the Rural Area even thaugh some areas presently containing charaCteris#ically suburban develQpments may be contained within areas designated as Rural ►4reas. b, Significant ImpaGts The anitdal impact of the praposed development wvuld be achange in the eurrent zoning c1ass+fieativn firom 4JR-3.5 to UR-12 for 14 acres af the site. A PUD averlay xane with bonus density is propased fmr the entire site ta aIlovv design flexibility and open spaces. The existirag agriculturaf and rural land use character of the site would be altered due to the intrvductian of urban densitres and public seruices. The development woufd pravide a density transitivn betvaeen tFae higher density manufactured hornes and mu1ti-famiiy units #v the narth and west and the fvwer density large acre lats to the 5auth of the s6te. SHaRELINE IMPACT: Polic'ses fvr SFroreline Use and residential development are established tv prevent ervsion, prvtect visual quality, cvntrol development of associated uses, and maintain water quality, Residentiaf development rrrust meet the falla►n►ing palicies and regulations irr the Rural area: fihe Rural Area. The Urbara Area Paficy 1. Residentiaf development sh9uld maintain the rural open s,pace charactsr. Palicy Z, Residential structures should be kept as fiar as passible from the 7■alGl ls e4/gG. Poliey 3. Residential density, site cvverage, and vccupancy shaFl be compatible with the bivphysical capabilities of the shoreline area. Shelley Leke €1S 45 Dctober 1993 Palicy 4. Cansideration shvuld he given to planned unit d'evelppments which cfuster develo prnent and Ieave the waterfro nt area free of structures. Pvlicy 5 Resideratiai developments shvuld be served by c❑mmunity or municipal water and wastewster facilities. Pnlicy 6. Developers sha91 pra►ride adequate provisions ta prfltect water quality during and after canstructian by prvvidEng fvr the pratectimn of Vegetation and ground cover and an adequate stvrm- water dcainage system. Ftilicy 7. Residential develapments shalE be designed ta protect the aesthetEC character of the shvreline area ar►d cause as Iittle , disruption as possibae tv vegetatinn, graund cover, and wildli#e, 8.2 The Rura! ►4rea. The Llrhan Area $.2. 1 Density shafl be based orr the biophysical capabilities of the site, snil percolat+an rates and Spakane Caunty Health District regulations, Spokane Cvunty zaning and su'bdivisian regulations, and the Cvmprehensive Rlan. 8.2.2 Bu+9dings shaRf nvt be canstructed in areas of 20 percent or greater sPvpe, fla❑d hazardvus areas, ar slide-prvne areas. 8.2.3 Adequate water supply, v►rastewater dispasal, sa4id waste disposal, and storm drabnage facilities shall be pra►rided in accurdancs vvith the Reguiativns on Uti6ities and the Regulatians on Salid Waste Dispvsal, as applicable. 8.2.4 The aesthetics and natura6 characterQStics of the area, including scenic views, soils, and wegeta#ian, shall be preserved to the maximum extent pvssibfe. The clearing of land for deUelQpment shall meet applicable requirements of Subsection 3. 2.3, Regulations far Fnrest Peactices, p. 4-9. The desigre of the propvsed deaeCoprrient includes a 50 fovt settaack of lots frvm the lake's ardinary high water eleuation. This setback and ,physical slope constraints will provide appraxirnately 100 fest of separativn between the lake and the housing structures. This results in same of the hvmes being wathin #he designated 200-fvat shoreline area. Project design alsa includes canstruction v# a woaden bridge o►►er ths Saltese Creek streambed. This bridge will a6ivw the sofit pedestrian trail t❑ extend around the Iake, and provide adequate access to asi 4he residents. Canstruction of a bridge ►n►ithin a Shelley take E15 46 Octaber 1993 desFgnated sharsline area must meet the follawing pofices and regulations in the Rural area: All Areas Palicy 9. Existing public access ta puhlic areas and uses of the shorelines, streams and lakes shall not be reduced ❑r eliminated. - The Rural Area. The Urban Area Pvlicy 1. Bridge crossings of streams and lakes and related approach raads and the widening of existing roads from two tu mare than two lanes of traffc may he permitted where they are parts of apprvved Caunty and State road master plans. ' Pv@ccy 2. Prt►►ate brodges shvuld be prohibited except where needed for access to i5vla#ed private prvperty. Whece permitted, private bridges shvufd pravide fvr free passage of flomdwaters, fmr safety, fflr adequate structural standards, and far aesthetic cvnsiderations. Palicy 3. Landfills arad end abutments far bridges shpuld nvt significantly impeds the flvw of fiootiuvaters, and the accumulation o# debris upstream of the bridge crossing of a stream shovlti be preuerated by the design of the landfills antf enti abutments. 12.3 Tlhe Aural Area. The Urban Area 1 Z.3.1 New r6ads and rail rQads may be permitted. 12.3.2 Bridge crassings of streams and lakes and related approach roads, and the widening of existing roads from twa ta more thara tr►va - lane, may be permitted where they are parts of apprQved Gounty and 5tate rvad master ,plans. 12.3.3 Rriaate bridges may be permitted where necessary for access tv isal'ated priVats prvperty. Where permitted, such private bridges shall can#vrm ta the requirements stated irr 12.2.4 SeCtlofl 12. 2.4 5tateS: - 12.2.4 Private bridges may be permitfed where necessary for acCess ta isQlated private prvperty. Where permitted, such private bridges shaff cvnfvrrn to the fvllvwing reqvirements. a) A11 parts of the s#ructure which are aver water shall Shelley Lake EIS 47 pctober 1993 be at least tvLrv feet abo►►e maximum high water; bf Land#ill and end abutmen#s shall be lanclward of the highwater mark; c1 Structural supports shall not be placed in a stream unless thvse supparts c❑nfarrra to ths standards applied by the Spokane Courrty Raad Qepartment; d1 VIlidth of th€ bridge area for Vehicles shall nvt exceed , 24 feet, subject to pvssible exceptivn inherent to requirement e), fvbfowing; e) Any such bridge prapnsed to be dedicated to and maintained by a puhlic agency shall confarm in advance to the standards of that agency and shala be appraved by #hat agency priar to issuance af a shareline perrnit; and fy All bridge structures shall have an appearance in favorable harmany with the generaf area enViranment. 12.3.4 Landfills and end abutrraents for bridges shalF be placed so that the flovv of #loodwaters shall not be significantly resfiricted. The design of landfilis and end abutments fvr br4d'ges aver streams shall preVent the accumulation of debras upstream af the bridge. The proposed deVelapment will camply with aff the pplicies and regulations of the Shoreline Master Prvgram. A 5ubs#antiaf Dev$lapment Perrnit is required and will be obtained far the constructian of hames, a wvacien bridge, and possibfy a fishing tiock within the 200-fovt shareline area. Z+QNING IMPACT: The majvrity af the site (103.6 acres aut of the tatal 123,8 aCres) is currently zaned UR-3.5. The proprased action includes changing 14 acres of the site's current zoning frvm IUR-3.5 to C1R-12 with bonus densnty. A planned uniC develpprnent (RUD) averlay is propased for the entire prnject. A change in zvning to 4JR-12 would aElow much denser residerataal develapment to occur in this area. The purpose and intent of ihe'UR-12 aone is to proVide a desirable IiVing environment that is cornpatibRe with surrflunding Iand uses. T'he UR-12 areas typically include muftiple-family dweldings frequently used to pravide a transitian between !ow-density residential zones and intensive business zones. General characteristics of these areas incfude paved roads, puh6ic sewer and water, manned fdre pratectian, and accessibility to public transit, schools, and libraries. The maximurrti density permitted ira the UR-12 aone is 12 dwelling units per one acre. The exception to this is when units are clustered in a PU[] overkay zane. In the event of a clustered design, the minirnum area sFaall be Qne dwelling unit per $00 square Shelley Lake EI,S 48 (]cto6er 1993 feet, provided the overall density for the site does not exceed 12 units per acre unless bonus density points are earned. Each lot in this zone must have at least 60 feet of frontage on a public road, except in a PUD, then there must be a minimum of 30 feet frontage. The residences must be setback at least 25 feet from the front lot line or 55 feet from the centerline of the right-of-way, whichever is the greatest. The side yard must be a least five feet per story, and the rear yard must be a minimum of 15 feet in length. The maximum structure coverage on the lot must not exceed 60 percent. Approximately 89.6 acres would remain zoned UR-3.5. The 226 single-family residential lots proposed for this area include a mixture of housing types. The nonhern approximately 13.5 acres will consist of 68 manufactured homes and there will be 158 conventional homes surrounding Shelley Lake. - The UR-3.5 zone allows for three and one-half dwelling units per acre. The minimum lot size is 10,000 square feet unless clustered in a PUD overlay zone. In this case the minimum lot size would be 6,000 square feet per residential unit, provided the overall density does not exceed three and one-half units per acre and unless bonus density points are earned. Each lot must have at least 80 feet of frontage on a public road, except in a PUD the frontage requirement is reduced to 50 feet. Setback requirements are the same as for the UR-12 zone, except the rear yard must be at least 20 feet in depth. The maximum building coverage is 50 percent of the lot area. General agricultural uses including livestock keeping and industrial, commercial, or mining uses are not allowed in either the UR-3.5 or UR-12 zones. The southern 20.2 acres of the site is currently zoned SR-1. Thirty five conventional homes on large lots are proposed for this area. The purpose and intent of this zone is to create an area of general residential character with moderate density. Agricultural uses are considered secondary in this zone. The maximum density permitted in the SR-1 zone is one dwelling unit per acre. The exception to this is when units are clustered in a PUD overlay zone. In the event of a clustered design, the minimum area shall be one dwelling unit per 15,000 square feet, provided the overall density for the site does not exceed one unit per acre unless bonus density points are earned. Each lot in this zone must have at least 125 feet of frontage on a public road, except in a PUD where there must be a minimum of 90 feet of frontage. The residences must be setback at least 25 feet from the front lot line or 55 feet from the centerline of the right-of-way, whichever is the greatest. The side yard must be at least five feet per story, and the rear yard must be a minimum of 20 feet in length. The maximum structure coverage on the lot must not exceed 35 percent. This zone allows for the keeping of livestock if certain criteria are met. This includes lot siie requirements for certain species and minimum distances from the adjacent dwellings for livestock housing and grazing. However, restrictive covenants for the Shel/ey Leke ElS 49 October 1993 PUD will prohibit large animal-keeping on-site. The purpose and intent of the Planned Unit Development (PUD) overlay zone is to encourage a creative, efficient, and comprehensive design for the entire development site. This overlay helps to ensure the preservation of usable open space and enhance special site features. A PUD, through clustering or design, will facilitate a more economical and adequate provision of public services and possibly energy sources. A PUD is capable of providing a variety of environments for living, working, and recreations. The density for each PUD.varies, as residential density is determined by an equation that takes the Net Development Factor and multiplies it by the Number of Units per Acre Allowed in the Underlying Zone, this is added to any Earned Density Bonus Points to reach the Total Units Permitted. Density bonus points can be accumulatively earned by designing the PUD to make special provisions for items such as: common space, environmental concerns, internal circulation, public service and facility availability, using a design team, and mix of housing types. Through the PUD design and approval process, guidelines will be set to ensure that the intent and purpose of a PUD overlay is adhered to, and a quality living environment is being proposed. Within a PUD overlay zone, there is a requirement for the provision of designated open , space. Common open space must be a minimum of ten percent of the total area of the site, and a minimum of 200 square feet of private open space must be provided per each residential unit. There are three options of how the common open space may be administered; it may be dedicated to the County, maintained by the homeowner's association, or retained and maintained by the developer. The following table shows a comparison of the proposal's compliance with the UR- 3.5, UR-12, SR-1, and PUD overlay zoning requirements. With the proposed zoning and PUD overlay with bonus density, the allowable number of lots could conceivably be 772, although only 460 are currently proposed. For comparative purposes, if proposed with existing zoning (UR-3.5 and SR-1) and no PUD overlay or bonus density, only 382 lots would be allowed. Shel%y Leke ElS 50 Ociober 1993 R,RL3P❑SEOiPUL17Z€iNE``~vMpLiA~'NC~~~~~,;,•; . ~ , , x.:~,~,~, . . ,r, - ' PAR.411AETEI4' ; e~CCUV4IED '~WIThf "PUC3 1,rVCLC7DIIVGa~~ ; P'17DPA5Fd ~ ~ J PEI~ XOIV'E : ..'Y'O fVERLA Y ` , ~ . `Bf1NUS ~ . i , s'~ < xf.~.. • , «L3~NS1T'~ L' " " . . . ' , •3>~. , , , v> , • , P[]TEIVYIAL NUMBER DF LOTSIUNITS; UR-3.5 272 313 447 225 UR-12 168 168 199 196 SR-1 18 18 58 38 T[]TAL AREA: I UR-3.5 NIA NfA NIR 89.6 ACRES il1R-12 14.0 ACRES - 5R-1 20.2 ACRES ii1ET [}EN51T1': ' UR-3.5 3.5 UNITS/AC 3.5 UNITS/AC 5.75 C1NITSIAC 2.0 UNITS/AC UR-12 12 UNITS/AC 12 UNITS/AC 14.25 LltiI7S1AC 14,00 UNITS/AC 5R-1 1 UNI7IAC 1 UNITIAC 3.25 UNITS/AC 2.05 LJiVfT51AC MIN. LOT SIZE: UR-s. 5 10,000 SF 6,000 sF 6,000 sF 6,000-1 s,ooo sF uR-12 6,000 sF soa sF $aa sF 14 o acREs 5R-1 1 ACRE 15,000 SF 15,000 5F 15,000-41,000 SF TOT►AL NIJMBER OF L0T5: NIA 499 704 460 QPEN SPACE NIA 12.3$ ACRES 12.3$ ACRES 36.9 ACRES AREA: t10% IViINy 11096 MiNy RELATlONSHIP TO EXISTING CvMPREHENSIVE PL►4N: The existing UR-3.5 and propased UR-'t 2 zaning with aPUD averlay is cansistent with the Urban categvey af the County's Cvmpreheraside PEan. A detailed definit3an af the Urbarr categvey as #ound in ihe County`s Camprehensi~e Pian foRlows: DETAILEQ DEFINITIC}N OF URBAN A. Density Characteristics: Residential ne# densities shvu1d have an appraximate d+ensity af nne unit per acre to 17 units per acre. B. Characteristic Features: Since Urban areas will be the most rntensely develvped of all the categvries, it is primar+ly a resid~ntiaa Categvey of single-family, two-family, mult+-#amily, and ~ 5helley Lake H5 51 Ocrober 1993 cvndominium buildings al❑ng wFth neighbancood commercial, light industrial, arad public and recreativnal facilities. Agricultural actiVities will be very limited and cnnsidered a secondary use. The aesthetac setting wiil be predaminately man-made structures vuith accasionaE na#ural or planned ❑pen spaces. Most areas in an Urban setting may nvt have a v`rew of natural areas, and ❑pen spaces will most likely consist ❑f park andlar 5Chaolgrmund5. Low-to-maderate Eevels of nvise and air pQllution will m❑st likCely exast in Urban areas due ta the interrsity of actuVities and the high vopume of traffic generated. Yhe more tntensive 1and uses such as light industrial and neighbarhoad commerciai wi!l be Iocated near the heaVily tcaveled streets, while the keast intensive single-family residential uses wili be isvlated fram the nQise and heavy tra#fic. Multi-famiFy structures will usually be a trarasitional use Iocated between single-fami6y residential and the more intensiVe aeeas. C. Pubiic Fac+sities and SerVEces: urban area5 will have public vaater systems, sanita►y se►rver systems, storm sewer systems, and utility systems suGh as electrical, telephane, gas, and cabfe services. Streets wild be curbed and paved. Street lights and sidewalks wall be camman tv r+esidentiaf, pubCic, arad cammercial areas. 5pecialized pathways may a9sa be common in the Urban area. Public facifities irrclude elemenrary, junior high and high schools. Parks wilp normally be associated with schoals but not exclusively. PubEFC libraries, ma nned f1 re 5tatians, medical facilities a n d government vffices and pvst offices may be dispersed throughvut Urban areas. Other serWices typical of LJrban areas may include police, pubfic transit, refuse cvEfection and removal, animal control, and street maintenance. D. Noncompatible lJses: Due tQ the variety and rnix of land uses and activities found in the Urban category, there are fev+r land use actiVities that would be inappropriate. IVlany uses rnay requice screening ar other performance standards tv make them compatibfe with one anather. Mining, major commercial uses, heavy andustrial uses, and intensive xarming would not be compatible within Urban areas, The existing 5R-1 zone with a PUD vver1ay is consistent with the Suburban(+) category o# the Gounty's Comprehensive Plan. A detailed definitivn of the Shelley Lake E15 52 Octaber 1993 Suburban(+) categQry as found irr the Cvunty`s ComprehensaVe Plarr faflaws: DET►41LEfl QEFINITIQ'N OF SUBURBANt +y A. []ensity CharacteristECS: All res+dential net densities shall range from arre acre per dwelling unit to 5 acres per dwelling unit. ane acre per dwelling is the minimum tv maintain the large-animal-keeping lifestyle in the Suburhan(+ ) area through irnplementatinn ' of zoning. B. Characteristic Features: The predominant use in the Suburban(+) categary will be sir►gle-family unit5 an Ivts which have considerable space for gardening, baarding a Iirnited numbec ~ af Carge animals ar perhaps s+mply natural open space. Few,cammercial uses wi9l be found in the Suburban(+) areas. When commerciaB uses are needed , they should be cCustered (rather than Iocated throughout the Suburban4 + y area) on sma11 s+tes kocated adjacent tv principal or minQe arteria1s and should be limited #o neighhorhood serVices such as a grocery st❑re, insurance office, barbershap, andllor serVice stativn clustered tv serve the immediate ns'rghbarhvod trade area. The aesthetic setting should be predaminantiy s'rngle-family residential sfructures vn large lats. Hauses should be well spaced and separated by large lawns, gardens, planted trees vr native vegetat+vn. Most hvmes wil9 enjvy a Vimited uiew of apen space in either agricultural use nr natural conditions. Few buildings will be multu-stary beyond two stary. Har°ne professivns nr hame industries wguld kae aalvwed if the acti►rity maintains the characCer and aesthetics of a Suburban(+ ) residential area. C. Public Facilities and SerWices: Suburbara{ +}areas shouCd have public water systems, on-site sewage di5posal systems (or public s+ewers, sanitary and storm, when such facifities exist nearby or wherr required by public health 6ssues), pa►►ed and curbed streets, pvlice and fire prvtection, utilities, and pastal service. additionally, refuse collectian and remvwal, medical facilities, pubfic transit, and libraries all wilf be avaikable but often at a lovver level ❑f ser►►ice than in the Urban areas. - Educativnal facilities, WF11IP. IQCBLP.d aS CoIIVefll$ntay 35 po$5[bI$i will generally require that chE{dren ride a bus betweerr home and schvvl. Shelley Cake EIS 53 Octaber 1993 D. Nvncompatibae Uses: The Suburha n( cate gory 1s basicaliy residential, a nd #herefare cnost industriap, majvr cvrr►merCia'I and mining activities are incvmpatib9e within this categvey. MuEti-facnily uses are incampatib'e within the Suburhan(+) areas. Light Industrial uses would not be campatib9e vvitliin 5tiburhan(+) residential areas. Other sma11 ❑r independent businesses would nat be faund irr Suburban(+ ) res'sdential areas. Residential develapments with lots of a size that wnuld nat accvmmodate large animaf-keeping are not campatible arad would nat meet the purpose af the Suburbara(+ ) lifestyde. The fvllawing is a discussion cvncerning why prvpased develvpment can he cvnsidered eompatibfe with the Cvmprehensive Plan"s Glrban and Suburban{ + ) ca#egories. Since the gaais and ohjectiVes for bvth these categvries are substantially the same, the discussians canceming cflmpatibi1ity have been cvmbined. GC]AL 1.1 ENCOUR►4GE A VARIETY OF H()USINC TYPES ANQ DEfVSaTIES ObjectiVe 1.1.a ❑f the Cvmprehensive Plan states: "PromQte fill in v►►ithin established development areas and existing mutlying comrnunities where utilities, arterials, schovls and community facbfities have already been estabfished". The praposed praject wvuld be develaped in an area having established pubEic services and utilities. Adequate pawer supplies, water, sanitary sevvers, street5, schvvl, palice, and fire 5ervices surrvund the 5ife, Extensians ❑f utilities onto the prajeci site are feasible from adjacent prvperties. 7he base net +density for the mu1#a-family dwelling area ar+d ths suburban area has been increased using bonus density as allawed vvhaen meetong tne fill-in criteria. ObjectiVe 1.1.b af the ComprehensEve Plan states: "H+gher-density developments such as multi-family and mobile home (manufactured homes) parks shnuld be 9oca#ed with direct ar near direct access to the major arterial systems rather than on interior neighbvrhood streets. ►4ccess tv public transportation should also be considered". ObjectiVe 1.1.c of the GomprehensFVe Plan states: "When multi-family dvweffings are to tae Iocated adjacent to single-fami4y areas, careful cvnsiderativn must he giVen to the density and designs vf the multiple tamily development so as tm ensure protectian nf the amenities ❑f the single-family area". The prQposed derrelopment has been designed placing the multi-family area adjacent ta 4th Ayenue v►rhich is a Collectar Arteriai. SeVeral apartment complexes are also Ivcated an 4th Avenue west of the projec# site. The proposed manufactured home area is also located in the nvr#nern part of the site just east flf 4th avenue, and adjacent an twv sides ta existing mobile home parks. The northern portion of ihe pr4ject site is nearest ta both Slullivan Raad and 5,prague Arrenue, which are Princi,pal A►teriais. This portion ❑f the site is 5helley Lake E15 54 actvber 1993 als❑ weli served by public transit stvps at Sullivan and 4th and at 5prague and Conklin. The mul'ti-fami6y area will be separated from adjacent single=family homes by fencing and landscaping along #he extension of Gonklin Raad sQUth to Ra#chford DriVe. Open space areas will separate the manufactured hame area from the single- famiiy homes to the sou#h. Restrictive cavenants wilf gavern the types and condifion of manufactured hvmes allowed withon the PUa. Landscaping and stQrage standards will be develaped Ca maintain consis#ency with the adjacen# single-family area. Objective 1.1.d of the Comprehensive Plan states: "Endvrse the hasic right of free choice for all people ta live where they please." The propmsed project prar►ides a variety of hvusing unit types and densities including manufactured homes, multi-family attaehed units, and single-family Iots frmm 6,040 square feet to 47,004 square feet. Objectiue 1.1.e of #he Compreher►sive Plara states: "Establish standards for mobiPe hvme housing and sites th,at improWe the compatibili#y of mabile homes with s#andard residential developments." As previously stated, restrictive couenan#s concerning the manufactured ham$ area regarding type of structuce aliowed, landscaping, and starage requhremerrts wi61 ensure cornpatibility with the prvpvsed single-famQly area. Restrictive coveraants vaiEl address 1fthe pro►rision of off-street parking and storage, 2) the prvvisivn of skirting or faundatiQn, and 3) rvaf shape and compasition similar to canwentual sEngle-family residential structures. Clther objectives relating t❑ the above stated gval include: 1.1.f "Encaurage irrnovative ideas by praViding oppQrtunities tv test therra." 9.1.g "Encvurage building cades and zoning ❑rdinances fio aalow the use of more energy efficient ecancamicai methods of constructivn and development." 1.1.1h "Ensure that building codes and zoning ardinances, when fegally apprvpriate, allvw #vr more crea#ivity." The prvpvsed project has been designed using bvnus density and the PU❑ cvncept of clustering deveCopment tv allow for larger expanses of open space area. The prvpasal inciudes apprvximately 36.9 acres of vpen space that will be preserved and maintained by and iar the enjoyment of the residents. Adjacent prvperty aesthetic issues will be addressed thrvugh restrictiVe cvvenants and the development of innovatiVe landscape designs. ❑esigns for Shelley Cake EIS 55 Uctaber 1993 the project boundaries may include three foot berms with fencing and landscaping. GOAL 1.2 ENCOURAGE A VARIETY OF PARKS AND OPEN SPACES THAT MEET THE NEEDS OF ALL PEOPLE IN OUR RESIDENTIAL AREAS. Objectives 1.2.a and 1.2.b of the Comprehensive Plan states: "Support increased cluster development providing for open spaces with the development" and "Ensure adequate open space, recreational facilities and parks for residential development." Design of the project includes cluster development under a PUD overlay bonus density. The project has been designed to be compatible with nearby development. Multi-family and manufactured homes areas are located in the northern portion of the site adjacent to similar existing uses. Larger lot single- family homes are located in the southern portion of the site providing a density transition to the one acre Rotchford Acre Tracts. Single-family homes on conventional size lots are located surrounding the lake and serve as a buffer between the higher and lower density areas. A large (36.9 acre) open space area is defined as common area and will be maintained by the homeowner's association. Recreational opportunities will be provided for use by all residents of the development. Proposed facilities include a soft pedestrian trail encompassing the lake, picnic areas, a swimming beach, and a community center. Potential facilities may also include a launching area for non-motorized boats (canoes and rafts) and a fishing dock. Objective 1.2.c of the Comprehensive Plan states: "Identify historic sites and preserve the most significant, by appropriate legislation, as parks and open spaces." A professional cultural resource survey of the project site was performed as part of this environmental impact analysis. The results of the survey along with identified impacts and proposed mitigation measures are discussed in Section 1.2. No "significant historic sites" are identified on the project site. GOAL 1.3 ENCOURAGE CONSERVATION AND UTILIZATION OF NATURAL FEATURES AND VISTAS WITHIN THE COUNTY. Objectives 1.3.a and 1.3.b of the Comprehensive Plan state: "Guide development by environmental concerns and natural limitation rater than thwart development solely by desire to protect environment" and "Future developments shoutd be encouraged in a manner to least disturb the natural elements in the environment." The proposed development has been designed to protect and enhance existing environmental features including Shelley Lake, its associated shoreline and wetlands areas, Saltese Creek, steep sloped and wooded areas, and valuable wildlife habitat areas. The project proposes to enhance the existing vegetation Shel%y Lake ElS 56 October 1993 with plantings of value ta wilrilife, while providing recreational ❑ppvrtunities having alow irnpact an vpen space areas. A tatal of 36.9 acres are designated as open space and will be rinaintained hy the hflmeowner's associatian. Ohjec#ive 1.3.c of the +Camprehensive Pfan states: "Residential platting should be deVelaped with publiC se►rvers where it can be established that aEterrratives vvauld he a threat tv the water source." The praject will be served by the Spokane Caunty public sanitary sewer system. ~Existing sewer marns will be extentfed an-site from adjacent areas. AII proposed hAUSing units will be connected to the sewer systern. Storm water will be managed using acombination vf grasS swa[es and retentiarrldetention ponds in accordance with "208" drainage requirements. Storm water run-ofi# frvm the developed areas will be prevented #rom entering 5helley Lake. Objective 1.3.d. ❑f the Cvmprehensive Plan states: "Future activ+ties affecting the shareline areas in the County shauid be guided by the Sharefine Master Plan.° The State Shvrelines Management Act and the Cvunty Shareline Master Program aversee 4he management af uses affecting public waters and areas 200 feet landward fram ihe high water rnark. A Substantial Develvpment Permit is cequired and will be vhtained fvr construc#ian of homes and a woaden bridge over the Saltese Creek streambed, allowing the soft pedeserian trail to extend arnund the lake. A permit would also be required far development gf a fishing dock andlor n❑n-mvtvrized bvat faunching area. The praposed develapment will cacnply with a!I the pvlicies and regulativns vf the Shareline Master Program. GQAL 1.4 MARSHES AN❑ FLQQQPLAIfVS, STEEF' SLaPES, AND ❑THER HAZARa AREAS ❑R LaW-PRaDUCING LANDS SHQUL❑ BE GvIC3ED AS pF'PRDPRIATE 1NTC3 RANCELANQ, FC3REST, WILDLrFE HABITAT, OPEN SPACE, RECREATlCIN, AND OTHER USES. Objective 1.4.a 4f the CvmprehensiVe'Pian states: "Identify and manage #lavd pfains and vther hazard areas tv preuent iass of 1ife and property." Housing structures will not be develaped within the 1 0a-year flvadp6ain and will be in accordance wi#h Caunty Engineers fCvad preventivn regWlations. Starm water will be managed using grass swales and retentionldetentian ponds which will preuent surface run-vf# frvm reaching Shelley Lake, Na change ❑r increase to v►►ater flows will result frvm the prvpvsed deVelopment. Areas with steep slapes are designated as open space and will not haVe urban Iand uses. Dbjective 1.4,b af the Cvmprehensive'Plan states: "Identifiy fragile v►►ildlife areas and vanishing species needing prvtectivn and deve4ap methads for such prvtection. Shelfey Ceke f15 57 Octvber 1993 Unique envirvnmental areas shvuld he conserved and made avaiiable for educativnal pufp05B5." Accvrding ta the results of this enviranmental impact ana1ysis, there are no species of coracern wiihin a ane mile radius of the project skte. The proposal includes designating 36.9 acres as permanen# open space including the lake and surraunding shoreline, riparian and wetland areas, and steep s9ape areas. Valuable wildldfe habitat areas haVe been itlen4ified and pro,posed plans iraclude protecting and enhancing these areas. Educativrral materials cancerning the native habitat areas arrd effar#s at enhancement wili be distrEbuted tfl each hnmeawraer, alang with information encauraging owners to landscape thecr yards with wifdlife habitat needs in rnind. Educational materials refating to area enViranmentaf issues vvdll be availahls thraugh the hvmevwner's associatian. G(3►4L 1.5 ENCOURAGE R HEAI.THFUL AND PLEA'SING ENVIRflNMEIVT !N THE COUNTY'S RESIDENTIAL ►4REAS. ObjectiVe 1.5.a of the CQmprehensiae Paan states: " Nevv residential or muliiple-family deve1apment should be buftered firom existing adjacent land uses where adverse effects may deVelap." , The propased devekopment will be buffered from exasting adfacent land uses using a combinatiQn ❑f density transition, setbacks, 4erms. #encing, and landscaping treatrnents. 0 bjectives 1.5.b a n d 1.5.c of th e Cvrnprehe nsiwe Plan 54ate: "E ncourage installation of undergrvuntt' utilities" and Encvuraga paVed streets and sid+ewalks in existfng and future deVelaprnents where they are apprapriate tv the nature of the development." The prvpvsed develapment will include the installa#ian of undergrvurod ut+lities, street lights, and paved streets. Sidewa6ks will be prvvided along public roads as specified in the County Arterial Road Plan. ►4 combination of paved sidewalks and saft trails will be prvVided within tne PUQ. ❑bjectiVe 1.5.d of the Camprehensive Plan states: "Residential areas shfluld be discauraged within high noise level tones such as in the vicinity of airpvrts, rawlrvads, and freeways." The proposed development is, nat wafihin a high rooise IeVeI zone. Prvtection frQm adjacent noise saurces is nvt required. Other objectives relating tp the ahave stated goal include: 1.5,e When a neighborhvod experiences pressure ffvr change in character, such ch►ange shall be permi##ed upar► apprapriate rediew. Shefley Leke EIS 58 _ Detn6er 1993 1.5.fi Gonsider the profile, especially height, of the exi5ting neighborhovd when euaiuatirag multi-family develapments. 1,5.g In many instances, mobile home and mufti-family deaelvpment may be appropriate to renew residential areas. The propased project has been designed to fit in wdth the existing adjacent neighborhQOd charaCteristics on aIE sides af the site. The praposed manufactured hame area is adjacent on twa sides to existing mobile hame parks. Fourth Street west of the site is transf#+aning from single-famity res€dences to three-story apartment complexes. The mufti-family area prvpased is directly adjacen# to this transitivnal area. Building heights af multi-famrily structures will be twv flr three story according to site tapagraphy and allawing for view cvrridors. The high quality nature vf the proposed develapment is - ex,pected to enhance the residential character ar aesthetics and improve the residential vaEues of the area. GOAL 1.6 AN C3ROERLY PATTE'AN OF DEVELOPMFNT SHOULD BE ESTABLISHED BETINEEN DEVELC7PED AND L11VDEVELQPED AREAS. Oajectfwe 'i .s.a of the Gvmprehensive Pian states: "Utiiities services such as water, sewer, pvwer, and natural gas shauld be orderly and prvperly coordinated with Land llse Planning." The proposed development will cpnfvrm to all the pfans, polir:ies, and regulatians of County water, sewer, storrn sewer, utility, special servi~e districts, and transpartatian plans and pvlic€es. This enviranmental impact anaEysis has iden#ified significant enviranmerttal impacts to existing uti6ities and traffic systems that may vccur. M€tigation measures to resalve the identified impacts have heen autlined as part Qf the praposed project and incfude extension of public sewer, public water, natural gas, electricity, and cable to ssrve all residential lots. A61 utilities avill be extended in an vrderly and caavr+dinated manner. Transportat+on impact5 can be mitigated by phased orderly develapment and the raad improvements discussed in 5ect4on 2.1. c. Nlitigating lNieasurQs The PUD ❑verlay zvne alfows for the clustering lots to provide mare an-site vpen space. These apen spaces preserve the uraique natural enwarons within the site including sharelirres, wetlands, steep slapes, and wildlife habitat areasr The lot sizes and des6gn provides adensity transitian #ram highec density areas to areas already estabiished fvr Evwer density suburban uses. AnimaP keeping wi11 not be allav+red within the PU❑ and domestiG pets will be restricted. The intrcaduction af hames t❑ what is nvw undevelaped property may be Viewed by Shelley Leke EJS 59 pctober 1993 sarne as a negatirre aesthetic ►►iew impact. Restricfi►►e cvvenants and an archifiecturaf cpntral bvard will help to control the aesthetic apaearance af homes in the Shslley La1ce development. A phasing schedule which anticipates approximately 50 Idts to be developed and built on per year will accDmmndate the gradual introductivn of new residents to the site. The phasing schedule arrticipates an eight- to ten-year buiid out based on current market cvnditivns which should aliow for a timeiy adaptativn of the s6te environs t0 development, as well as time fvr 4mprvved 9evel of service. The planned unit development pfat wii6 prvuide engineering plans for storm water mcinagefYleflt CC1dd5, water, and sewage disposal as necessary prior to finalizativn. RestrictiVe covenants wiil be prepared and recorded for the Shelfey Lake PLDa to controB the qua6ity ❑f develo{ament. A hmmemwner's associaCion will be respvnsible fQr enf❑rcement. The covenants will he9p to ensure a safe and enjoyabCe living enVironmeni and will address fire retardant raofing, pain4 co'lors, exterivr finishes, landscaping, and fencing, as weE6 as large anirnal-kee,ping, dmmestic pets, and vther concerns such as maintenance. 1.2 Cultural Resvurces a. Affected Enyironrnent A prafessianal archaeologicaE survey vvas perfvrmQd fvr the project site by the Center fvr Nvr#hwest Anthropology, Washington State University. The survey included a backgrvund study of previvus archaevfogy and ethr+ography findings, a field survey, and preliminary evaluations af culturai resvurce significance (see Appendix C). The svrvey for cu@tural resources was carnpleted at the praject site on July 23, 1993. Surface and subsurface examinatiQns were accomplished by a six-rnember field crew. The survey area was diVided irat❑ four avnes and field surveymrs were deplQyed aCrass each zane walkkng regular systematic tra nsects 10 to 15 meters a part. Wicfths ❑f the transects uarsed to accommodate fandforrn features and grarund caver. Numeraus showel probes (1116) were excavated tFarvughvut the site up to depths of approximately 57 centimeters below grounri surface. Most mf the site offered high surface visib6lity due to the large extent of plowed fields and Iack af heavy grvund coVer. Findings vf the fiefd survey included a passib6e basalt flake, a passible enti battered cobble, and arv unfikely pieCe vf passible fire craeked rvck. Na significant cultural resaurces were found on the project site. Current pruperty owners stated that previnus ❑ccupants indicated the presence af Nnrthwest American Indians in close prvximity to Shelley Lake. 7he Rice's were #ald that members of varivus Ioca'I trihes, including wamen and children, rrvauld meet svmewhere nearby in arder to settle their dififerences. They repvrtedly traveEed fram the Spokane River south and passed next to the existing residence. No evidence was Shelley Lake EIS 60 Dctaber 1993 discovered during this study foeating such a meeting p1ace on property wdt'hin the propased development site. b. 5ignificant Impacts The professivnal archaevFogical surVey cvmpleted at the prvject site included both a recards search and a fieid sur►►ey. Na s+gnificant cultural resvurces were found on-site arrd their presence ar farmer presence was nvt indicated rfuring the review vt lacal, County, vr State files. Therefore ncr significant impacts to ❑n-site cultural resQUrces are expected due to development af the project site, c. Mitigafing Measures CornpfQance with a!l federaA and state requirements per#ainirag to the protection of cuIturaC resources has been obtained due to the completipn +of a professionaG archaealagical survey flf the praject site. Accvrd9ngly, rr❑ further actians are proposed. Maweaer, shvuPd a potential cultura'I resource be discovered later bn the development process, on-site construction will halt urat9l a professianal evaluatian of the resaurce can be compieted. The lacal Historic Preservatipn OffiCe wauld he cvntacted immediately arad wauld assist in abtaining tne necessary permits for work to prviceed. Shelle y Cake E15 61 Dctaber 1993 i ' ~ - - PI E IVJ ~ ~ AH Iif 36 31 ~ x ~ ~ L LL SLEY , o re13tW ~LLE u ' 440 T T ~ o 6 o m N `4 ~ ~ ~SA/ 4 ~ ° E~]CL! D CLID ~ EU G ~ o AUsti t'\ weN o E sp lC]I 4 ~ ~ ~ C• t ~ - ' r 1 ip A ~1 T.iberty L.a ~ 310 M1S51ON ~ V ~ Cre ~ ~1 13 1 ~ s ' ~ A i ' 10 ~ ltif BTta Isc~rr 2,2- ' H►'I! erty L 2-1 ° elf IB N f1 K a 30 ~ O ~ ~5. a z C s, 34 Well ~ 31x 2 Q T v 4 4TN ` ~ ~ ~ ■ ~ e /~'a~ • • i ~ • . 4 7j~ ~ • . . . ~ _ ~,,f,Yrns ~ ' ~ . • ~ i , ~ • ~ r . . ~ ~ ti Sp rr oATE: vcrosER 1993 I scnLE: NoNe CpMRREh1ENSllrlE P'LAN FI[,URE HO: PROJFCT NO,: 92-032 DESIGNATIQNS 9 ~-7 Sl-I~LLEY LAKE PRELinrtrNaRr P~~ PLAT ENVIRONMENTAL IMPACT STRTEMENT ~ ~(hf1U~ 'I r7I Q VR-395 + - ~+R63,5 ~ N °33 • ~ ~ - . , ~....,..~~1 A►. i r~ ~ rc ~ ~ 'B 2 • UR-3.5 ~ B°2 1rJ B M UR'~L2 B-2 3 la-,> A -2 B -2 B -3rr -PRr~&u ~ ; u ~ -3 ~ ~ - • ~ - ~ ~ L . ~~i'9L~ • ~ ~~f~ y ~ N B~ ~ uR-~z UR-7 ~-z ~ uR-7- ~ UR z 1 r -.!i- , . - . . i . . ~ ~ .t... r _ ~lu B p Q` c U'^ l'f. L'Yr f _ i W enTra!- la I I'ey. F L AJ~~' ~ e dt _ ~ ~ pi,r i URm .5 ol i~,~, ~ r,.•..~ ~ - - - y r . _ ~ . _ - i - ~4 - yT 4i~H ~ ,C.~. F ~ . - . ~ F~ I 'H Ci ~ ~47arw m TC a7~+IIC tr p o~ i k AY~ 0 ! 4t ~ + P a L!~ 4u f~ NSFa - 1,- ` ~x i~ ~ AU Y'o ~j uR-2z~' • ~ a r ° 1 V R • r~ e! 5 ~ ~ ~ ~ ~ ~v ~ r. ~ t _ ~ . SOURCE` SPOIiANE CDUNTY PLpHNINO [7EPARTMEII[T DATE: OCTOSEFi 1993 ~ SCALE: NONE FkGl1RE IYO: PROJECT No.: 92-032 ZONING CLASs7FIcATIoHS 10 -~J SHELLEI~ IIAKE PRE4.IMIN►4RY P~Ip E'IAT ~J[~. +►'Y~+~2 ~~~C3~~~E~°r ENVfROWMEIVTAL IMPACT S1f►41'EMENT ~P 7-04 ~ #4 6i t- 2.0 TR14111SPURT►471ON TJt$~1UCpa0Lr10'A~ ~~~~~~s X7 T6 2.1 Transportation Systems ~ ~,~s~ ~ T ~ ,~►~A►~Frtq N 4L4 a. ►4ffected Environment ~ Yhe project site for the proposed develapment is located sauth of the intersectian of 4th Auenue ant! Cankfin Road, apprflximately ane-haaf mile south of Sprague Avenue and vne-ha6f mile east of Suilivan Rvad (see Figure 2). At this tirne the site is nat bouraded by any rQads fvr any appreciable distance. To the smuth thers are three street termini at the plat boundary; Rotchford [7rs►►e, Galway Stree#, and Shamrack Street, ~ Tv the east there is na adjacent raad, with Steen Road praviding the clvsest access at the very svutheast por#ion of the p7at. At this time there is nv# expected to be arry through cvnnectivrr tQ Steen Road. Tra the nor#hwest the site is bounded by Conklin Road to it's terminus and intersection with 4th Avenue, which continues adjacent t❑ the plat west for one-quarter of one mile. " The raadways and intersecCions affected by deVeloprr`rent of this site are fisted and discussed belvw. , • SuiliVan Fiaad • Sprague Avenue ~ 4th Avenue + Ceanklin Rvad • Rotchford C]rive SoUT i'k U+~~ AILTVIL1 Atl.+ -(PI5W5~~ OA-~ i~r-mSe) Sullivan Road is a twv-way, northlsouth major arteriaf within the Spvkane County rvad system, with a posted speed 16mit of 35 MPH. It serves those adjacen# land uses hetv►veen 7rent Rvad (SR 290) to the north and the terminus of Sullivan Road tv the south at 40th Avenue. Within the d6rect project Vicinity, betwesn Broadway Avenue and 4th Avenue, 5ullivan Road is baunded by primarily cammercFal uses ancf zvning Rsee Figure 10). ~ Due t❑ the roosed commerciaP rawth within hi ner p P 9 t~~e a1 1lalley area, the County in combinatian witFa deVelvper participation is in the process of irrrproVing #hat sectian of 5u1livan between 1nterstate 90 and Sprague ►4venue. Th€ prapvsed improvements include improvements ta the intersection with the I-90 eastbaund ramps, the Sullivan and Mission Avenue intersectivn, the Sullivan and Broadway intersection, the Suliivan and Sprague interseCtio n, and cvnstructing a twa-way, seuen-lane rvad way from I-90 tv Sprague Avenue. At Sprague Avenue this seven-lane section (incfuding S8 tm WB Right Dnly arrd a WB tv NB right turn lane from Sprague) wi91 match into the existing fi►re-lane section sauth of Sprague. Svuth of Sprague Avenue SulIFvan Rvad cantlnues as a majar arterial, with a tvva-way, Shelley Lake EIS 64 Qctober 1993 five-lane section for approximately one-quarter mile where a two-way, four-lane section begins. This four-lane section extends from approximately 2nd Avenue south to 16th Avenue, where Sullivan begins to become an awkward two-way, two to - three-lane section depending upon the intersecting street. South of 16th Avenue Sullivan is a two-way, two-lane roadway with a left turning lane installed at 24th Avenue. Between 4th Avenue and Sprague, Sullivan has curb, gutter, and sidewalk - on both sides of the roadway for pedestrian uses. Sprague Avenue is a two-way, east/west major arterial within the Spokane County road system, with a posted speed limit of 35 MPH. This facility serves those adjacent land uses between the City of Spokane Central Business District to it's eastern terminus at Interstate 90 in Greenacres. Throughout it's length the land uses along Sprague Avenue vary from single-family residential to multi-family residential, commercial, and industrial. Within the direct project vicinity, between Sullivan Road and Conklin Road, Sprague is bounded primarily by commercial uses and zoning (see Figure 10). Within this area the roadway section on Sprague varies from a two-way, seven-lane roadway with curbs, gutters, and sidewalks on the western leg of the Sullivan and Sprague intersection to a two-way, four-lane roadway at Conklin Road. It has a distinct rural cross-section as no curbs or sidewalks are included within this section and access is across a gravel shoulder, except at paved approaches or intersections such as Conklin Road. 4th Avenue is a two-way, two-lane, 25 MPH, east/west tocal access street east of ~ Sullivan and a two-way, two-lane major collector west of Sullivan Road. East of Sullivan, 4th Avenue provides service to the adjacent properties, providing little through traffic progression beyond Sullivan. Between Conklin and Sullivan, 4th Avenue has sidewalks, curb, and gutter where adjacent development has constructed these improvements. Between the project site and Sullivan it is expected that the north side of the roadway will have a continuous curb, gutter, and sidewalk, as all the ~ available property will be developed into multi-family apartment units. It is expected that by 1994, 4ih Avenue between Sullivan and Conklin will have approximately 700 to 900 apartment units accessing Sullivan Road via 4th Avenue. Conk/in Road is a two-way, two-lane, 25 MPH, north/south local access street which runs between the project site at 4th Avenue and Sprague Avenue. For a short portion north from 4th Avenue Conklin has curb and gutter on the west side of the street, along the existing mobile home park. The rest of the road has gravel shoulders and provides access only to those adjacent property owners. Within this area land use is mixed primarily between higher density residential, such as the mobile home park, and commercial uses along Sprague Avenue. Rotchford Orive is a two-way, two-lane, 25 MPH, north/south local access road. This facility provides ingress and egress service to adjacent residential development along it's length. Currently Rotchford Drive exists between 16th Avenue to the south and _ Shel%y Leke ElS 65 October 1993 the southern boundary of this plat. There are two connections directly to Rotchford, one at 12th Avenue which connects to Sullivan and another at 16th Avenue which also ties to Sullivan Road. Based upon the project scoping meeting as well as requirements of Spokane County Engineering, the following intersections in the site vicinity were identified for analysis. • Sullivan Road and Sprague Avenue • Sullivan Road and 4th Avenue • Sprague Avenue and Conklin Road • Sullivan Road and 16th Avenue Existing Levels of Service (LOS) for the affected intersections are listed in Table No. 3. TABLE NO. 3 1993 Peak Hour Existing Levels of Service AM EXISTING TRAFFIC NOWMES ~ PM EXISTING TRAFFIC VOLUMES INTERSECTtON Signa(ized , Unsignalized .II Signatized I Unsignalized ~ Delay I ' V/C • LOS I Cap ' LOS ' II Delay V!C I LOS I Cap I LOS Sullivan Road and 24.4 0.53 C 30.2 0.79 D Sprague Avenue Sullivan Road and 175 D 76 E 4th Avenue Sprague Avenue and 424 A 101 D Conklin Road Sullivan Road and 273 C 121 D 16th Avenue ~ ' The criteria used to define Levels of Service for the above intersections is provided in ~ the following tables. Shel%y Lake ElS 66 October 1993 SIGNALI2EQ INTERSECTkL3NS LEVEL [3F SERVIGE CRITERIA ',,LerrBl af Stopped De18y, ~ . , parWhIcle (sec) A I t = 5.0 B 5.1 to 15,4 C 15.1 ta 25.0 [7 ~ 25.1 to 40.0 _ E ~ 40.0 ta fiO.fJ F I > 60.0 Source: Transpartatian Research Baard; "Highway Capacity Manual," S,peciaG Repart 209 - 11985). l1NSIGh1ALIZEd IIVTERSEC710NS LE4'EL OF SER!/iCE CRITERIA Aesecve Capar.ity" , Leve1 nf Serwice $ ~pecteil oalsy to , (pcph) , r ry~~ Mirror 5treel,,Traffic 400 [ ~ A ~ Liftfe o# No Delay 300-399 B ~ Shart Trafiic Delays 200-299 C ~ Avarage Traific Delays 100"19$ I ❑ I Long Traffic Delays 0-99 I E ~ Very Lpng Traffic Qslays 07 F Progressian Freakdown Siopped Condit+arr Shelley Cake EIS 67 dctaber 1993 b. Significant Impacts The transpartation impacts far the three al#ernatives have been anaiyzed as part of the Transpmrtatian Impact Analysis included in Appendix D. The Prvpvsed AcLion alternative consists of 265 [ots being develaped over the next seaen to 15 years inta 264 single family de#ached residences arrd 196 mufti-#amify (apartmentltownhouse) residences (see Figure 3). The plat vvill be built aut in phases, with 5$ units campleted by 1995 (Phase 1) and the remaaning 402 vnits cvmpleted by 2000 (Phase 2). ~ *3p ►~~~+~+~~s I)I3C.U~~ #OAOS It is antic6pated that tne vnly cvnnectign td the*,Tau' ern strgt -tLromirii vi►rlNe'bvi~a-o -oor. Rotchfarct Qrive, which will be extended thrnugM the plat t❑ tie dErectly dnta CQnkEin Road. Fhe intersection vf 4th A►renue and Cvnklin vvill be recvnstructed sa that 4th Avenue will make a curve to the southeast and tie int❑ Cvnklin at a 90-degree angle. U**0 Pramary ingress and egress frvm this alternative will be via Conklin Raad nvrthlsouth PGC dhrectfy to 5prague Avenue. It is expected ihat 4th Avenue wifl provide serUice +-l. directly tv a small portivn ❑f the praposed multi-farri6Ey, which wili be cvnsistent with the ❑ther 700-paus apartments currently existing ar propased alvng 4th Avenue. ',~Fi i I r _ 'dLi1~+~~►,~ ~ ►bIII. The '~evelopmer~t Under '~xisting Zoning alternative consists af 25 lats being A-m develvped over the next s+e►►en to 15 years intQ 225 single-family detached res4dences. Shis alternative has afso heen analyzed with aphased build aut approach, with 58 units cvmpleted by 1995 (Phase 9) and the remaining 169 units com,pleted by 2000 (Phase 2). As with the Prapased Action a9ternative, ta the south tnere are three street termini at the plat baundary; Rvtchford C7rave, Galway Street, and Shamrvck Street. It is antic8pated tha# wi#h this alternative the plat configuration vviil cannect to aff three of these street termini. Of these streets RotchfQrd Drive wauld be the only public street extended through the plat to tie directly inta 4th Avenue at Cannery Road, as shawn in Figure 4. Tv the narthwest the site is baunded by CvnkCin Fiaad to it's terminus and intersectiDn with 4th Avenue, which cQntinues adjacent to the plat west far ane-quarter of one rnile. Primary ingress and egress for thes alternative will be ►ria Ratchford Dride north directiy #o 4th Avenue. Fram 4th Avenue access wiil be providec4 ta the west via 5uiai►►an Rvad along 4xh Avenue ❑r to the svuth Wia Sprague Avenue and Canklin Road. The third alternative anaEyzed is the Nv-Action alternative, whiGh totally precludes development of the project site. Existing conditians and rvad cannectians would remain vn-going. 5helley Lake EIS 68 geta6er 1993 b.7 Proposed Activn Alternative ' PHASE 1 - 1 995: Based upan the analysis performed for this alternative, no direct specifdc impact which auauid degrade the Phase 9- 1995 backgrvund ledel of service ❑f the surrounding street sys#em can be deterrrainerl, with the exceptian of the Sprague Auenue arad Coraklin Road intersectivn durung the PM peak haur. Hawever, in conjunction with 4he expected grvwth levels assaciated wifh thas Iocation wfthEn Spokane Cvunty, during the peak hour this intersectian dves ncat drvp helow the minimum acceptable LC3S of E for an unsignalized intecsection within Spokane Cvunty. PHASE 2 - 2000: AM Peak Hour - Baseri upon the analysis as perfarmed for this alternative, several intersectivns drop belaw the background' levels of service, and one of these intersections draps belaw the minimum threshold as vutiined by Spokane Caunty. Quring the AM peak hvur, the tvvo intersectioras which drop belcaw the backgrvund levels of serWice are t'he Sullrvan and Sprague and the Sprague and Canklin iratersectivns. The Sulliuan and Sprague intersectivn, havNever, fafss belvw the minimurri acceptahle feve1 ❑f serUice for this intersection (see the Traffic lmpact Analysis in Appendix D). Although ihe change carries the intersection through the LOS of D1E threshmEd, several timing revisivns cnuld be incor,porated ta minimize ❑r negate the impacts. Even with adrop in the level of service, this intersection rnacntains adequate capacity to handle the volumes generated by this propased prvject as wefE as the backgrvund growth, but the sEgnal timing and existing Iane configuratians do not allaw the intersectivn ta operate at it`s maximum potential. PM Peak Haur -lBased upon the analysis as performed far this aGternative, only the Sprague and Conk6in intersectian drvps beEvw the backgrvund levels of service. In addition tv dropping befv►iv the background leve6 of service, it also drops belaw 5pokane CQUnty's minimurn acceptable ledel of service. At this lvcation the resuRting level of seruice for this alternatiVe is an LOS of F, with a reserVe capacity of -35. This is due tQ the increase of 64 additional nvrthbaund tv west4vund left turns fram Conklin anto Sprague. b.2 DeVefo,pment Under Existing Zaning AEternative PHASE a - 1995: Based upon the analysis perfvrrned for this aIternateve, no direct specific impact which vvould degrade the Phase I- 1995 background leve6 of servsce of the surrounding s#ree4 can be determined. 5helley Lake E!S 69 C1cta6er 1993 PHASE 2 - 2000: . The impacts for this alternative are similar to those described above for Phase 1, only that the degree of severity at Sullivan Road and 4th Avenue is complicated by land development further south of 4th Avenue, and not necessarily the developments along 4th Avenue. However, the turning volumes onto 4th from Sullivan are significant and would force this intersection to not only meet several warrants for signalization by year 2000, but would also result in significant intersection improvements such as left turn lanes and intersection signalization. b.3 No-Action Alternative No impacts to the future transportation system other than from background growth could be attributed to the project site. c. Mitigating Measures Potential mitigation was investigated by alternative for those identified intersections affected by the proposed development of the Shelley Lake project. This investigation evaluated by intersection the existing LOS, the future background LOS, and the future LOS with the project, with recommendations as follow. c.1 Proposed Action Alternative Sullivan Road and Sprague Avenue - Based upon the existing, future background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection will continue to operate beyond the minimum acceptable levels of service for a signalized intersection as identified by Spokane County. At this time there is very little mitigation that could be recommended except that this project could participate in the development of the future dual left turns which will be required on both of the northbound and southbound legs of the intersection. However due to the location of this project, participation would only be limited to the percent traffic participation for the southbound (PM peak hour) dual left turn lane. Sullivan Road and 4th Avenue - Based upon existing, future background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection will continue to operate below the minimum thresholds of level of service as identified by Spokane County. However, this alternative specifically re-aligns the proposed 4th Avenue and Conklin Road intersection to allow through traffic, with a home based- work orientation, to access Sprague Avenue rather than to allow travel down 4th Avenue to Sullivan Road. Therefore, mitigation as proposed by this alternative is to allow for the realignment and reconfiguration of the 4th Avenue and Conklin Road iniersection. Sprague Avenue and Conklin Road - Based upon existing, future background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection Shel%y Lake ElS 70 October 1993 +~+t~ "SiQr~~~[' 1e~ t~,~ LDk~K~ N 11~ ~ ti ~L~ ~ will continue ta operate within the minimum #hreshalds af level of service as identdfied by Spokane Cvunty. It is recognized that after future build out this intersection will be opera#ing w%th levels of service in the LQ: QlE rarage. Part of the decreased leVe9 ❑f service at this intersection has been in response to the poor IeVeIs of service, and nQ capacity availahGe _at the Suaiivan Rvad and 4th aVenue intersectian. Due ta the realignment of t h e 4t h and' Conklin intersection all alternatiue traffic is encouraged tv use this intersection. AC this time and with e uture level pf 5ervice at an L05 vf EIF, the mitigativn at this intersection invvlVe - I installation of a signal. e 0041L.1W 3 LS ~re 1'* ~'~►t+~ G #I,~~i~~1.~ 1'~~tt] '`u~llV d+or~IdLrrat jL~~n ~v~~n~th venue~~ased upan existing. future backg rvund, and fut~ace Fhase 1 as well as future Phase 2 (buiid out) levsls of service, this intersection will continue ta operate within the minimurn threshvlds ❑f level af seruice as aderatified by Spakane Cvunty. Therefvre no potential mitigatian is recommended at this time. c.2 [3e►►elopment Under Existing Zvning AlternatiVe 5ullivan Roadarrd SpragueA venue -Based upon the existin g, f uture baekground, and future Phase 1 as well as future Phase 2 tbuild outf levels o# service, this intersection w6il cantirrue tv operate during the A'(V1 peak hour withirr the minimum acceptable lerrel s caf seraice for a srgnalized 1 nte rsectian as ide ntified by 5po kane Cau nty. D uring the PM peak hour this intersectivn, for future backgraund as well as future vuith the projeet, wifl operatebe4vw the acce,ptable IeVels ❑f service for this intersection. For tY115 alLeFf1$LIVer it is expected #hat aII vehiclss assvciated with tfnis project wif9 be throGgh vehicles at this intersectian. in the e►rent that Spokane Caunty were t❑ revise this intersection by prvviding additionaf thraugh aanes, it would tae recommended that this project participate tv the percent Ier►el of responsibility due to the volume of trips. Sullivarr Road and 4th Avenue - Based upon the exist+ng, future background, and future Phase 1 as well as future Phase Z tbuild outy levels ❑f service, this intersection will cnntinue to operate belaw the minsmGm thresho9ds of IeVel vf service as identified by Spokane County. Due ta the canfiguration of this alternative, RotChfard Drive would b+e extended straegh► through tv 4th Avenue. Fvr this akternatiVe analysis v►ras provided that spli# the traffic aeaving the ,project site, based upon irauel time and speed. This analysis indicated that 4th Avenue t❑ Sulfrvan Raad woultf be the quickest way t❑ reach the 5ulliuan and Sprague inte►sectivn. This is primarily due ta a right turn at SuPliVan and 4th Versus a left turn a# Conkfin and Sprague. If this alternative is chvsen, recvmmended mitigation would inc6ude plat recanfiguration, to #he poirat vf the 1ass Qf additional C❑ts, tv reaEign the Conklin RoadlR❑tcnford ❑rive and 4th Avenue interseCtivn. Additaonal mitigation beyond this wauld be the same as #hat recommended above for the Propmsed Actian alternative, at the S,prague Averrue and Cvnklin Rvad intersectimn. S,prague Avenue and CohkJin Road - Ba sed upo n the existin g, future bac kgrvund, a n d future Phase 1 as v►rell as future Phase Z(buVld out) levels of serVice, this intersection wilr continue ta operate within the minimum threshvlds af level of service as identified Shelley Cake E15 71 vctaber 1993 by Spakane Caunty. Therefare na potential mitiga#ian is recommended at this time. Sullivan Road and 16th .4venue - Based upon the existEng, future backgrnund, and future Phase 1 as well as future Phase 2 dbuild vutf leveEs of service, this intersection will cantinue to operate within the mirrimum thresholds of level o# service as identi#ied by Spvkane Cvunty. Therefvre no patential mitigation is recorramended at this time. c.3 Nv-Action Alternaxrde Na mitigatian wauld be required far the Nv-AGtivra aEternatiVe. 2.2 Vehicular 7rsffic a. Affected Environment Traffic volume counts were taken in June and July of 1993 by Inland Pacific Engineering staff at ai6 of the identified intersectians. These existing traffic caunts are listed in Figure 11. h. S`grrificant Impacts b.1 Prvpvsed Action Afternative SITE CaEIVERATED TRAFFIC: Trip ge neration estimates were prepared for the maximum pote ntiaf fo r t h i s a Iternative devefvpment of the Shelley take project. Based upon the exESting zoning cade far Spokane County, approxirnateEy 264 single-family and 196 multipfamiay units could be antf are proposed within the 5hefley Lake praject site. The trip generation estimates were determined using the Institute of Traffic Fngineers, Trip Gerreration Manual (TGM), 5th Editian. The TGM provides empirica9 data based u p o n act ual fiefd vbservations fmr trip generatjon characteristics of similar residential devefvpmerats throughout the Unixed 5tates. The TGM provides trip generation rates based upcan the land use type, i.e. commercial, residential, industry, schoof, etc. Therefore fvr this trip generatiera analysis, Land use Code 210 - Single-Family Detached and 220 - Multi- Fam91y Attached fram the TGM will be used to determine bvth the AM and PM peak hour trip generativn rates. The propvsed pcvject wil6 generate Various voEumes of traffic during canstructivn of the several,phases of deVelvpment. At Phase 4campketion, which includes 58 single- fannily residential homes, the prvposed prvject will generats appFOximately 43 AM peaic haur and 53 PM peak hvur trips. The anticipated tatal number of vehicles which will be generated throughout the day would be 590 vehicles per day (Vpd) . Of the 43 AM peak hnur trips, 11 trips will be entering the site, while 32 will be exiting. Of ihe 59 PM peak hour trips, 38 trips will be enterrng the site, while 21 wi1l be exiting. Shelley Lake E1S 72 Ocra6er 1993 For Phase 2 completion (or full project build out), this alternative will generate approximately 283 AM peak hour trips and 375 PM peak hour trips. The anticipated total number of daily trips which will access this site is expected to be approximately 3,750 vpd. Of the total 283 AM peak hour trips, 66 trips will be entering the site, while 217 will be exiting during the AM peak hour. Of the 375 PM peak hour trips 246 will be entering the site, while 129 will be exiting. PHASE 1- RESULTING LEVEL OF SERVICE: AM Peak Hour - For Phase 1 completion this project does not degrade the level of service beyond the background LOS for any of the identified intersections PM Peak Hour - For Phase 1 completion this project will reduce the background level of service at the Sprague Avenue and Conklin Road intersection. The specific reduction in LOS is the reduction from an LOS of C, 236 pcph to an LOS of E, 88 pcph. Although this level of service reduction from an LOS of C to an LOS of E seems excessive, it is only associated with a northbound left turn volume change from four left turns without the project to 20 left turns with Phase 1 of the project. PHASE 2(BUILD OUT) - RESULTING LEVEL OF SERVICE: AM Peak Hour - For Phase 2 completion this project will reduce the levels of service beyond the background levels of service at two intersections. The first intersection is the unsignalized Sprague Avenue and Conklin Road intersection, where the 2000 background LOS of A(473 pcph) and the LOS with the project is anticipated to move to an LOS of D(145 pcph). Although significant in the fact that the overall reduction is three levels of service from an LOS of A to an LOS of D, this reduction in LOS is still above the minimum acceptable LOS as identified by Spokane County. The second intersection to experience a reduction in LOS is the Sullivan Road and Sprague Avenue intersection. This intersection reduces from an LOS of D with an average delay of 36.0 seconds to an LOS of D/E with an average delay of 41.6 seconds. Although the LOS D level is exceeded, an increase of 5.6 seconds of total delay is arbitrary due to the somewhat subjective nature of signalized intersection level of service calculations. Usually the rule of thumb would state that with more aggressive signal timing, incorporating shorter cycle lengths, and incorporating more right turn on red or left turn permitted/protected phasing, a 10 to 25 percent reduction in delay can be achieved. In order to maintain continuity between level of service calculations for review, these timing revisions were not incorporated. Therefore, an average delay change from 36 to 41.6 seconds could be considered to be very little change, if any at all. Additionally, the primary reason for the increase in LOS is due to the overall increase in traffic volumes at this intersection and the reduction in green time for the eastbound and westbound directions given the larger through volumes along Sullivan Shelley Leke ElS 73 October 1993 Avenue. Therefvre, if there were mmre through ranes aVaolabCe for through traffic pragression or northbound @eft turns, the aVerall intersection Eevel of service cauld be rnaintained within the acceptable lirnits of no less than an LQS ❑f D. PIN Peak Haur - For Phase 2 completion th+s prvject will reduce the SulliVare and Sprague and the Sprague and Conklin intersections belaw the Ievefs of service frvm the background grvwth in traffic. As vrrith the earlier discussians, the IeveCs of Service reductions on Sprague Avenue a re not reductivns vn Sprague AVenue, rathe r they are the res ult of addittorra! thraugh uolurnes on Sprague Avenue and this thraugh traffic's impact on the intersecting side st►eets. The impact ta the intersecting side streets is usually in eether the northbourad or southbound unsignalized left turn. As indicated for Phase 1 completivn, the increase in bvth through traffAC vn Sprague and an increase of 16 left turns reduced the reserve eapacity by 150 vehicles. T'he same is true for Phase 2 campletivn, where the increase in northbvund left turns is frorm a pre-develaped alternatiVe Vvlume of fvur to a developed' build vut volume of 68 left turns. Et showld be noted that this volume is approximately half that of the left turns wn the AM peak hour. However, the higher east4ound cammuting ►rcalumes an Sprague and the conflict that they present forces this intersectivn to an LC]S of F. At the Sulfivan Road and 5prague Avenue intersection, the reductian in 9evel ❑f service created by this intsrsectian is twa fold. First, the increase in thraugh vvlumes due ta considerabfe backgraund grvwth, cornbined wrth an increase in left turn ►rvlumes #+or access ta the proposed Fred Meyer facifity, have pushed this intersectian beyond it'S capacity #o serve the expected grawth. By the year 2000, with a background level of service at an L4S of E (90.2 seeonds), the addptioraai delay arrd level' of serVice reductian to an LOS of F (1117.7 secnnds) is the resu8t of the southbvund tv eastbvund left turn being heyond capacity with no additional green time awailable ta improve this le►►el of serVice. In the eVent that the County were tv cvns#ruct dual lefts at this intersectdvn as part of the 5u11idan Road impravement project, LO5 at this interssctron will increase to an LO5 of E with an aaerage delay of 55 secands. PHASE i - 1995 (IMPACfiS): Based upan the analysis performed fQr this alternative, na direc# speci#ic impact whEch wvuld degrade the Phase 1- 1995 background Ievel of ser►►ice of the surrounding str@et system can be determined, with the exception of the Sprague Avenue and Conklin Raad intersectivn during the PM peak hvur. Hvwever, in conjunction with the expected growth levels associated with this focation vvithin Spokane County, during the PM peak hour this intersection does not drvp below the minimum accsptabfe LC15 of E for an unsignalized intersection within Spokane County. 5helley Lake Ei5 74 pctober 1993 PHASE 2 - 2000 (1MP►4CT a): AM Peak Hour - Based upvn the analysis per#armed fv► this aiternatiVS fvr future build aut in the year 2[]00, several intersectivns drvp below the backgrvund 4evels of serVice, and one of these intersections drap t elow the minimum threshold as ❑utlined , by Spokane Courrty, ' ~ DurFng the AIN peak haur, the twv intersectivns vvhicfh drop bekavv the hackground le►rels of service are the Suilivart and Sprague and the Sprague and Gonklin Iflt@PSeCtIDf'ti5. The SulliVan and 5prague intersection, haweWer, falis below the minimum acceptable le►►el of serVice fvr this intersectinrr. As described earlier, the change irr LDS is from an L[7S of D (36.0 seconds) to an LDS of E(41.fi seconds). Although the change carries the intersection through the LC]S of DIEihreshofd, severai ' timing revisimns cvuld be incarparated to minimiae or negate the impacts. TFae reai ~ measure of #his signalized intersection's capabilities to handVe the added traffic volumes from this aIternative is that the Wc ratia moves firom a backgraund vlc ratia of 0.78 to a vlc rativn of 0.$9 with the afternative. Therefvre, this intersection mainta°rns adequate capacity to handle the uoRumes generated bythis prapQsed project as well as the background grvw4h, but the sigrrsl timing and existing lane cnnfiguratinns da nat a1lvw #he intersectivn to operate at it's maximum potential, PM Peak !-laur- 6ased upan the analysis perfvrmed fior t'his alternative for future build out in the year 2000, ❑n!y the Spragua and Gonklin intersectivn drops beFow the background IeVeBs of service. It alsa drops below S,pokane County's minimum acceptatsee IeveR of service. Far an un5ignalized intersectian the minimum acceptable levec ❑f service is an LOS ❑f E. At this lacation the resulting leuel of service t+ar this alternative is an LC35 0f F, vvith a reserve capacity o# -35. As nvted earlder, this is due ta the increase of 64 adtictional northbvund to westbvund Ieft turns fcom ConkBin onto Sprague. It shoulri be noted that a reductivn En intersectiara reserve capacity is being reduced by faur tirraes the number of added 1eft turns. This type of capacity reductivn is indica#ive of increased through traffqc volurnes vn the intersecting street, in this case Sprague Avenue. b.2 aevelopment Under Existing Zorrin$ Alternative SITE CEMERATED TRAFFIC: As witta the PropQSed Actiora alternatiue, trip generativn estirnates vvere prepared far the maximum paten#ial far #his alternative. Based upon the existing zoning code for Spokane County, appraximately+ 225 single-family units could be proposed within the Shelley Lake praject site. The trip generatian estinnaCes were determined using the Institute of Tra fffc Engfneers, Trip Cen€rativn Manual(TGN1). 5th Edition. T herefore, for this trip generativn analysis Lend Use Cvde 210 - 5ingle-Family petached frvrn the TGM v►+ill be used tv determ6ne bvth the ►4M and PIVI peak hour trip generatiara rates. This alternative will generate rrariaus valumes ❑f traffic during cvnstruction ❑f the Shelley Lake EIS 75 dcttrber 1993 several p'hases of development. At Phase 1 campaetion, vvhich includes 58 single- famiiy residential hvmes'. the project site wiPl generate approximately 43 AM peak h o u r and 57 PM peak haur trips. The antieipated totaF number of uehiclss which will be ' generated thrcaughout the day wvufd he 570 vehic7es per day (vpd). Of the 43 AM peak hour trips, 11 trips wilE he entering ihe site, while 32 wvll' be exdting. Of the 57 PM peak hour trEps, 37 trips will he entering the site, while 20 will be exiting. For Phase 2 com,pletion (vr iuli project build out), this alternatiVe wi!l generate approximately 166 AM Peak hour tr+ps and 228 PM peak hour trips. The anticipated tvtal number of daily trips which will access this site is expected to be approxqmately 2,2$0 Vpd. Of the tota4 166 AM peak hour irips, 44 teips will be errtering the site, while 122 will be exiting during the AM peak hour. ❑f the 228 PM peak hQUr traps 148 will be enterlng the site, while 80 will be exiting. F'HASE 1 - RESCJLTING LEVEC, C]F SERVCGE: AM Peak Haur - Phase ti' completiara of this alternative wilf only affect the reserve capacity of the Sulliuan Rvad and 4th Averaue intersectian, and w6!l nvt degrade the Ieuel of service beyand the background LaS for any ❑f the identified intersections, including the Sullivan and 4th intersectian. PM Peak Hvur - Phase 1 cvmpletimn ❑f this alternative will vrrly+ affect the reserve capacity ❑f the Sullivart Road and 4th Rvenue intersection, and wi[I nvt degrade the level of service beyond the baekground LOS far any of the fdentified intersections, including the 5uflivan and 4th intersectian. PHASE 2 (6L~IL❑ €]lJT} - RESLILTING LEVEL OF SERVICE: AM Peak Hour - F'hase 2carnpletion will nnly affect the reserVe capacity of the Sulfrvan Road and 4th Avenue intersectian, and will not degrade the Ievel of service beymnd the backgrvuerd LO5 far any of the identified 6ntersectians, including the 5uilivan and 4th intersection. PM Peak Hour - Phase 2 com,pletion wili only affect the reserVe capacifiy of the 5ullivan Rgad and 4th Avenue intersection, and will nvt degrade the IeveF of service beyond the background LpS fvr any of the identified intersectians, including the Sulld►►an and 4th iratersection. PHASE 1- 1995 (1MPAGTS): Based upon the analysis perforrroed far this aEternatdve, nQ direct s,pecific impact which would degrade the Phase 1995 background level of serVice of the surrounding streeC system can be det6rmined. The anly significant change cvncems the degree of impact and not the IeVeI of ser►►ice. The AN'I peak hour reserve capacity of the Sufbivan and 4th intersectivn decreases from arr LQS of F(-21) tv an LO5 of F(-143). What this spgnif;es is that due to increases ❑f through traffic vvlurnes along Suflivan 5helley Cake FIS 76 Clcrvber 1993 Road, any increase in traffic to the 2adjacent side streets will nvticeably reduGe the avaifable gaps to agreater tfegree than the specific numbec of cars sdded. An exarnple af thi5 was discussed for the Prvpvsed Act+an altsrnatlve, where 64 ieft turns were introduced and the rESerVe capacity was reduced hy a 4:1 ratio. PHASE 2 - 2400 (w'MPACTS): The impacts far this alternative are similar to thvse described above fvr Phase 1, anly t'ha# the degree of seaernty is camplicated by deveevpRnent fuether south of 4ih Avenue, and not necessariEy by the developments afvng 4th Avenue. Mowe►rer, the tuening volumes onto 4thr from SulliWan are signifacant and wou1d force this intersection to not Qnly meet several warrants far signalizatian by year 2000, but wauld aIso result in significant intersection innpro►rements such as Ieft turn lanes and entersection signa4iaation. h.3 No-Activn Aiternative SITE GENERpTE[] 7RAFF1C: For this prvject al#ernative, there will be na additianal trFps gsnerated than currently are generated by the existing prajec# site. 6MPAC75: No impacts to the future transportation system ather than frorn backgrvund grvwth could be attributed to the project site. , c. IVlitigating Measures Potential mitigatian was investigated by alternative fvr thase identified intersectiaras affected by the pPapvsed development of the Shelley Lake prvject. 1'his investigativn eualuated by 6ntersectivn the existing LOS, the future backgrvund'Lv5, a nd the future LOS with the praject, with recarnmendations as tollaw. c.7 Prvposed ►4ction Arlternative Su1Jivan Road and SpragueA venue - Based upon the existing future backgraund, and fu4ure PYrase I as we9i as future Phase 2{build vut) leae1s ❑f service, this iratersection will continue to Qperate beyand the RIIRkfX1L1R1 acceptable levels af service fmr a siSraalized intersection as identified by Spokane Cvunty. AC this time there is very little mitigation that cvuld be recammended except that this ~pra;ect coultf participate in the development of the future dual Ieft turns which wi1l be required Qn both of the nvrthbvund and sauthbvund Iegs ❑f the intersectian. However, due to the Iocatian of this prvject, participativn wvu1d anly be iwmited to the percent traffic participativn for the southbQUnd (PiVl peak hour) dua9 left turn lane. ShelleY Lake EI.S 77 Occvber 1993 Sullivan Road and 4th Avenue - Based upon the existing, future background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection will continue to operate below the minimum thresholds of level of service as identified by Spokane County. However, this alternative specifically re-aligns the proposed 4th Avenue and Conklin Road intersection to allow through traffic, with a home based- work orientation, to access Sprague Avenue rather than to allow travel down 4th Avenue to Sullivan Road. (Therefore, mitigation as proposed by this alternative is to allow for the realignment and reconfiguration of the 4th Avenue and Conklin Road intersectioiCMutT BE Attlloww gv 8"eAh o1= CovNrt Corth. FoK- V"rioN oF yh At Pu6L'%'c. 4~46AKAN6 pftu5ps) Sprague Avenue and Conklin Road - Based upon the existing, future background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection will continue to operate within the minimum thresholds of level of service as identified by Spokane County. T ' ' . l4 s~aNA~ W1c.4- 3a F ForL r~rttC 1- oP t Pli.o~ot~t cavsm,s,c.T ~onJ p~ Go~ ~•1 N d Tb Go~~.T~~ ih _ rAa4hA.OS ~ Ju//ivan oad and 16th Avenue - ased~ upon e xist~rrg, fature background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection will continue to operate within the minimum thresholds of level of service as identified by Spokane County. Therefore no potential mitigation is recommended at this time. c.2 Development Under Existing Zoning Alternative Sullivan Road and Sprague Avenue - Based upon the existing, future background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection will continue to operate during the AM peak hour within the minimum acceptable levels of service for a signalized intersection as identified by Spokane County. During the PM peak hour this intersection, for future background as well as future with the project, will operate below the acceptable levels of service for this intersection. For this alternative, it is expected that all vehicles associated with this project will be through vehicles at this intersection. In the event that Spokane County were to revise this intersection by providing additional through lanes, it would be recommended that this project participate to the percent level of responsibility due to the volume of trips. Sullivan Road and 4th Avenue - Based upon the existing, future background, and future Phase 1 as well as future Phase 2(build out) levels of service, this intersection will continue to operate below the minimum thresholds of level of service as identified by Spokane County. Due to the configuration of this alternative, Rotchford Drive would be extended straight through to 4th Avenue. For this alternative analysis was provided that split the traffic leaving the project site, based upon travel time and speed. This analysis indicated that 4th Avenue to Sullivan Road would be the quickest way to reach the Sullivan and Sprague intersection. This is primarily due to a right tum at Sullivan and 4th versus a left turn at Conklin and Sprague. If this alternative is chosen, recommended mitigation would include plat reconfiguration, to the point of the loss of additional lots, to realign the Conklin Road/Rotchford Drive and 4th Avenue intersection. Additional mitigation beyond this would be the same as that Shel%y Leke ElS 78 October 1993 recorramernded abvve far #he Prapvsed Action alternative at the S,prague A►►enue and Conklin Raad intersectian. Sprague Avenue and Conklin Raad -Based upon the existing, future backgraund, and future Phase 1 as well as future Phase 2 (build aut) Ievels of serVice, this intersectiQn will continue to apsr,ate within the minimum threshvEds af level ❑f service as identi#ied by Spakane County. Fherefare nv patential mitigat+vn is recvmmended at this time. 5ullivan Road and 1 fith Avenue - Based upvn the existing, future baCkgrvund, and , future Phase 7 as well as future Phase 2(b uild ❑ut) IeVe ls ❑f service, this intersection will cantGnue to flperate w6thin the minimum threshQlds of Ievel af service as identified by SpoKane CQUnty. There#ore na patential mitigatian is recommended at this time. c.3. No-Action Aliernative Nv mitigatian wvuld be required f❑r the No-Ac#ion altematiVe. 5herrey taxe FI5 79 Dctv6er 1993 • 7:S3eJ 101 166-77 C~ 214 353~ ~ 383 69 8 . [~r ILM1 ~ 41 H A] +O Ca D V rO I 5~RAG~E A~~ ~PRAGuE AvE ~ - ~ .2 N N z J z J 16 J/1 ~ 40 f/} ~ s~ o- s o 2 ~ L) C7 R7i N L7~ d FQUR7H ko ~ 63 24 y 1 D 27 4 RaCD~, ~ w ~a. ~ U ~ O 7 fiTH ~ ~ . z ~ NC7F TO SCALE ~ ~ ~ SC7WfiCE: SIiEL.LEY LAICE DEYELOPMEIYT TRAFFIC IMPACT ANALY8i6. INLAMD PACIFIC EN{31NEERING COMPAHY, INC. DATE. OCTD6ER 1993 ~ SCALE: HONE n[iURE Wp; PR0.IECT NO.. 92-032 AM PFAK HOl9R TRAFF`C VULUMES ,r1 SHE~.LEY L~►KE P~iELIMiNARY Pf1D RLAT G~[il'1~1~ C~T~.~.oCi.~L~E~.~ J ~I~LC. ENYIRONMENTAL Ii111P14CT $TATEMENT ~ 1 1 ~ ~v~ z s J'l 9 235 81 832--> sso 511 ~ 456 8 27 135 202 d LA SPFtAGUE AVE SPRHGUE AVE c3 ' a ~ a° L 27 a U 25 FOURTH La Ga ~LO YI) 55J, 10 ~ LL- Ld ~ L] ~ a ~ 16tH ~ r~ ~ z ~ NC17 TC7 SCA~E V) SOtIRCE: SHELLHY LAKE Q3EIIELQPMEfiIT TRAFFIC fMPACT AAIALY&lS. [NLAN[i PACIFIC ENGiWEERfNGG COWIPANY. INC. DATE: OC1'OBER 1993 ~ SCALE: NaNE I FIGIJRE AEO: M pNl pE14K IiOUR TRAFFI+G VOLU'MES 12 RROJEcT nta.: 92-032 SHELLEY IyA![E PFtELIMINAIRY PUC] F'LAT 4fRa ~McAiOCtRtES, ENVIRC1nIMENTAL IMPACT STATEMENT 3.0 PUBLIC SERVICES 3.1 Police a. Affected Environment Police protection for the project site is under the jurisdiction of the Spokane County Sheriff's Department. District No. 5 provides service to the area extending from Sullivan Road on the west to the state line on the east and from the Spokane River _ on the north to the hill tops on the south. District No. 5 is bordered by District No. . 6 north of the river and District No. 3 west of Sullivan Road. There is one patrol car assigned to cover each of these districts on a 24-hour per day, 7-day per week basis. Shifts in manpower demands sometimes leave one of these districts unpatrolled for short periods of time, however patrol officers often overlap district boundaries. Backup to District No. 5 is provided by adjacent District No.s 3 and 6. Response times to the area depend on the type of call, the location of the responding officer, his current activity, and the time of day. Currently there is not adequate police coverage for the County as a whole. There are plans for expanded services including additional officers if more funding is made available to the Department. A study was recently completed by the Sheriff's Department Crime Prevention Unit concerning crime rate percentages per type of residential neighborhood in Spokane County. The data used was from 200 Block Watch neighborhoods that were formed from 1979 to 1981 and extended over 13 years to the present. Study findings are as follows: Overall County average - 19% On or connected to an arterial - 19% Rental homes - 35% Five acre lots - 30% Cul-de-sac lots - 15% b. Significant Impacts The addition of 460 new residences and the related increase in population will add to the Sheriff Department's responsibility to provide adequate police protection to this area of the County. As population in the area increases, so does the number of crimes committed and the more people there is requiring service. Project design includes the extension of Rotchford Drive north to a connection with Conklin Road. This connection would make Rotchford Drive a collector arterial, impacting the existing neighborhood on the cul-de-sac at the north end of Rotchford Drive. According to the crime rate study completed by the Sheriff's Department, the Shelley Leke E/S 82 , October 1993 homes on the existing cul-tSe-sac have the lowest poteratiap crime rate in the Gounty. A change to an arterial rQadtirvay wvuld put ihese homes in the 19% potential crime , rate category, an increase of 4%. fnstead of heing at alacativn w6th th+e lawest crime ra#e, #he ra#e at these horraes would be equal to the overall County a►►erage. The Ratc hford OriuelConkEin Roa+d ccrnnectio n and resultant creativn of an arte rial may alsv impact frrant yard use in the existing cul-de-sac neighbarhvvd. T4e-teiadeRG" y~ vr-r~~c eat~9na purposes ma - The additivn of mvre people to the area and therr increased mobility aPsv wou'Fd limit the recognition of strangers. Developctaent of the area wald result in short-#erm ar kimi#ed site visits by construct+on workers, real estate agents, vr potential buyers. This will reduce ihe resident's abilaty #o recvgnize potential criminas behaVior.- c. illlitigating Messures Many a# the potentsal impacts that cvu1d haVe heen created through development of the prvject site have been mitigated through the propvsed sits design. HaVing a significant number of cul-de-sac streets and only two access poin#s dnto the development limits the potential far burglaries and other crimes because the perpetratar can easily be cornered by responding patrol afficers. The private community type of design proposed which includes perimeter berming and fencing typical9y generates less calls than the grid type of street design with multiple access points. Residents of the deVelapment cvuld form Bfvck Watches in their neighhorhoads. Program infarmatEVn and guidance an farming a group is readily available through the Caunty Sheriff's Department. Widespread participativn in this program can be very effective in deterring vandalism, burglary, theft, and rvbbery. Many of the resiciences that vvilf be included in the propvsed develapment will be upper-incvme hvmes. The owners of these homes willmast likely harre the resources ta install irldivedual security systems including aEarms andfor ssCUrity lights. The increased property tax reuenues generated frorn the prapased develmpment wi11 add to sheriff, fire, and schraol district funds and may help to upgrade manpawer and equipment needs. 3.2 Schoals a. Affected En►►ironment The pro}ect site lies within Central Valiey School District No. 356. Schvols that serve the area include Adams Elementary, Creenacres .lr. High, and Central Valfey High Schoal. Adams Elernerrtary is Ioeated at Adams RQad and 8th Avenue, approximately three-quarter miies west ❑f the project si#e. Greenacres ,Jr. High is located at IVlain 5he]Iey Lake EIS 83 October 1993 , Arrenue and Tschirley Road, apprvximately vne-half mile northeast. Central llafley High is adjacent on the west af the site. Students would he bused to Adams Elementary and passib6y to Greenacres Jr. High, but wauld walk t4 +Centra6 Valley ' High. GurrEntly the Qistrict's twelve eiementary schools are nearing maximum capacity. The seven junior high schovls rnay appraaeh capacity by next year, and there es sti'll _ adequate space a►raiiabfe at the two high schoals. Current enrvllment and maximum capacities far the schoals serVing this prnject are as follows. F' CIyaf3L` N[)., E'IU'~igLLEl~;~ ~~R~1~#XIIVlU1N"~APAGITY . , , ~ < Adams Elemerr#ary I 490 541-551 Greenacres ,1r. High 491 587 Central Valley High 9096 1400 Capacqty levels fvr each school are based on each grade being tatally full. HvwQVer frequently there is an unequal distrihutifln of students per grade fevel resulting in a school reaching capacity in some grades, but not in athers. Therefore even thvugh the abaVe table indica#es rennaining capacity at Adams Elementary, the school is nearirrg maximum enrallment capacity. INithin the twelae elementary schaals in the Distric#, 365 students are currentkybeing bused outside of theirhvrne boundaries tv even vut the student per grade distrihution. The seven junivr high schools may reach this point in the fall Qf 1993 and require student busing out af Evergreen Jr. High. The f]istrict has plans to cvnstruct a new elecnentary school at Liberty Lake and add twelve new classrovms ta the efementary schoo6s throughout the system. Attendance bourrdaries wvuld then be adjusted to ease cvngestion. In additivn fvur new classraoms are planned at the junivr high level. Unlike other school districts, Gentral Valley does nat use many portable classrooms. Bond issues are the District's primary source af funds far capital canstructian prajects, including the cvnstruction af buildings and tauying partables. Constructian af the new 5CF10[7I faCIlGtieS pI8d1ned Es contingent upon the passage of a band 15517@. Previous bond issues failed in March and November of 1992 and in March of 1993. The District plans tv cvratinue submissivn of a bond issue irr future elee'tions. h. Signiticant Impacts When fully built vut the praposed develapment wifl add apprvxima#ely 934 new residents ta the Central Valley Schov! District. Appraximiatefy 274 new students wvul'd need ta be accommrvdated by the school district, consisting of 160 elementary, 5helley Lake EIS 84 C3ctaber 1993 30 junior high, and 24 senivr high students. These prvjectians were generated using student generatican factars per type ❑f huusing unit frvm The New Practitioner's Guide - to Fiscal AnalXail supplied by #he District. Sirrce full build vut vf the develapment will accur aver an eight to ten year peripd, the Dxstrict wvuld not immediately nQed to accommada#e all 274 new students. The influx ❑f students would be gradual vuer the entire construction periQd. Approximately 50 dwelling units wauld be completed each year, and if the pfiasing schedule fvflvws the deveEoprr'sent plans, there wnuld be approximatefy 30 new students in#roduced intv the [7istrict each year. ; Adams Elernentary is nearing i#s maximum ca,pacity and Greenacres .9r. 'Fiigh has lirnited remaining capacity. These schooEs would be impacted by the additian vf new stvderrts from this and other residential dedefopments prop❑sed far the area. Thas , may require additional busing vf students outside their home boundaries, especially within the elementary schoaCs. Curcently there is adequate capacity at Central Vaiiey CHigh to accvmmradate the additional students generated by the prnposed prvject. _ The addition vf students to this area may facilitate the need for additional schoal bus serwice, including tYre passibility ❑f additivna9 buses and routes andlar route reaisions. c. Mitigating Measures ' To accvmmodate exEsting and future student enrollment generated by this and other deVelopment propasals in the avea, the ❑istract needs to cvmplete their existing expansipn plans. The proposeti bond issue v►+vuld allow fvr construction Qf a new elementary schooR servir~g the Liberty Lake area and additionaF classracrms at seVe►al elementary and junior high schovis. The District has alsa requested that impact fe+es be voluntarily paid by the prdjeCt developer on a per lat basis. These fees vvauEd help to fund the Distric#'s canstructivn, Iand acquisition, ar capital improVement expenditures, including the purchase af pvrtable classraams if necessary. 3.3 Parks and Recreation a. Affec#ed Environment The Spvkane Cnunty Parks ❑epartrnent oversees a tvtal of 23 parks, three gol# enurses, and one off-rnad vehicle park. The majvrity of the Cvunty's Parks are lacated within the urban portians of the Spokane Valley. Qespite this fact, there ar+e substantial deficits in neighborhvvd and cammunity parks in the Valley subareas due to the high population levels. * Ac+carding to the 1989 aookane Court4y Parks and 'Recreation 'Plan, the profect sFte is I❑cated within the East Valiey Suburban ►4rea. This area extends basically from Sullivan and Fmrker Roads on the west to the IdahQ state iine an the east and frorn 5helley Cake EIS 85 Occvber 1993 Faothills Road mn the north to 32nd A►►enue ❑n the sduth. There are nv neighbarhavd or cammunity parks wwthin the East hlalley 5uburban Area. S6nce the eastern bvrder of the West Valley Suburban Area extends a1ong Sulliwan Raad just west of the , project site, future residents of the propcased prflject may utilize parks in the West Valley Suburban Area. Park facilities in bath these areas do raot meet the needs of the existing pnpulativn. There are three basic classiiicativns of parks within the Spakane Cvunty park system; neighhvrhood, cammunity, and regianal parks. A neighborhovd park is intended ta serve residents vvithin a one-mile radius where the majarity of the users wa1k. Ideally they are lacated in the center of a neighborhvad. Children between five and 12 years of age are the primrary users. Desirable size is between three and ten acres, with trrva acres per 1,000 in papu1atian provided. , A cornmunity park serves more than ane neighbvrhood and users frequently drive ❑r bicycle tv them. A minimum of ten acres is desirahle ta serve residents within a twa and une-half mile radius. The range of faeilities provided is greater than fvr neighborhvod parics and may incfude swimming pools, picnic shekters, tennis cour#s, smccer and baseball fie9ds, trails, restrvams, and parking Cots. aesirable size is 20 tra 50 acres, with 2,5 acres per 1,000 in pvpulation proVided. Regional parks, within one hour's dri►►ing time, serve }arge geographical areas and are generally at least 100 acres in size. They are typically areas with outstanding natural featuEes or qualities assaciated with such features. Activities typicslly include picnicking, boating, fishing, svvimming, camping, and trail use. The two parks closest ta the praject site are 5ullivan and Terrace View. Sullivar+ Park is lncated an the narth side of the Spokane River at Sullivan Raad, approxdmately one and vne-quarter mifes narthwest of the praject site. This ten acre cQmrnunity type park has 1,400 feet of shvreline ran the riwer and has three shel#ers with 12 picnic tables. Add+tianal faciiities include barbecues, drinking fauntains, resirovms, play equipment, arad hiking trai6s. TFrere is als❑ a Western Square Darece Assvcaation buifding and a Radio Controlisd Car C1ub track and announcer's bvath. The Centennial Trail follaws tMe rider's southerrr shoreline just south of SuEiivan Park. There is patential for expanSivra to the west on vacant, tree-covered land. Terrace View Park is Iocated at 24th and Blake, appraxirnately one and one-half miles southwest of the project site. Yhis nine acre ne+ghharhvari park has 24 picnic tables, shelters, drinking fauntains, restrooms, play equipment, a saftball field, and a swimming pool with a bathhouse. There is potential far expansipn of ih+is park on approximatefy eight acres to the north. Liberty Lake and MeadowWaod gelf cvurses are 4ath located off Valley Way and Mvlter Raad in Liberty Lake, apprvxirnately #iVe rnples nartheast of the praject site. These County-vwned courses are bath 18 holes with driving ranges, cart rentafs, pra shops, and cluhhvuses w9t'h restaurants. Painted Hills gvlf cvurse has 18 hvles with Shelley Lake E15 86 C]ctaber 1993 a driving range and clubhouse with a restaurant. This semi-public course is located approximately three miles southwest of the project site. Central Valley High School, located adjacent on the west to the project site, has a multi-purpose gym and soccer/baseball fields. The shared use of school gyms and fields through cooperative agreements could allow for expanded recreational programs for adults. When fully developed the Centennial Trail will extend from the Idaho border through the Spokane Valley, the Spokane central business district, and on to Riverside State Park. It will also extend 12 miles east from the stateline to Coeur d'Alene and 27 miles west from Riverside State Park to Little Falls on the Spokane Indian Reservation. The trail is located approximately one and one-quarter miles north of the project site, along the south shore of the Spokane River. The trail accommodates bicyclists, pedestrians, and the handicapped on right-of-way that is mostly separated from motor traffic. Liberty Lake Regional Park is approximately 2,975 acres in size and is located approximately six and one-half miles east of the project site. It extends two full miles from the southeast lake shore to Mica Peak's north slope and includes meadow and pine forest areas, a sand beach, and a marsh bordering the shore. Facilities include restrooms, drinking fountains, shelters, 70 picnic tables, barbecues, campsite areas, trailer hookups, a swimming beach, observation pier, and hiking and horse trails. Recommendations for the West Valley Suburban Area include expanding Sullivan Park to the west, adding hiking and riding trails. Terrace View should also expand through the acquisition of approximately eight acres to the north. In the East Valley Suburban Area, stated recommendations include acquiring Shelley . Lake and developing it for recreational use including a juvenile fishing facility. Other recommendations for the area include developing a ten-acre neighborhood/community park in the Carlson Hill area, a 15-acre neighborhood/community park in southwest Otis Orchards, a 23-acre community/urban park in the vicinity of the Liberty Lake Sewer District, and acquiring Newman Lake frontage. The County Parks Department currently does not have adequate financial resources available for park land acquisition. In addition, private land donations to the County park system have slowed substantially due to a change in tax laws making this less financially attractive. b. Significant Impacts The proposed project will add 460 new residences to an area that was previously undeveloped. These new residences will impact ihe County park system by increasing the demand for park space and facilities at existing parks in the area. The majority Shelley Lake ElS 87 October 1993 of the impact vvauld be an organized sports facilities (ball fields) in the area, since these faeilities are already hsaviBy ❑uertaxed. Qevelvpment of t'he project site will preclude Shelley Lake'S acqui5itivn by the Caunty Parks Department as recommended in the 1989 Plan. it wvuld nvt be develQped for recreationaC use by the general public, but wvuld pravide recreatianal appartunities far , residents of the PUD. c. Mitigating IlAeasures The proposed prvject includes the deVelapment of recreatianal o,pportunities for Shelley Lake residents that wiil part6ally mitigate some of the impacts on the existing park system. These include a sofit pedestrian trail in the open space corridor surrounding the lake, picnic facilities, a svvimming beach, cvmmvnety center, and ' potentially an area fnr launching nan-motorized 4oats. Trail use will include walking, jogging, cross-country skiing, and birdlwildlife vbservatEOn. The trail wi[6 extend down tv the lake in severaE places to aflpw fvr shoreline fi5hing. Ice ska#ing cvuCd be possible on some pDrtions of the lake dueing #he winter. The existing meat packing building will be remoVed or renavated intv a cammunity meeting center. The center will contain meeting are,as aind educationa4 materials concerning wildli#e ha4itat enhancement and fisheries management programs. ❑ecisivns cancerning recreativnal uses of the open space areas will be guided and cantrolaed by the restrictiwe cvvenants. These coVenants, adopted by the 5helley Lake Hlomeowner's Associativn, woll encourage recreational activities tha# are cvmpatib@e with open 'space preservation and enhancement goals and restrict thvse that are disrupxive ta the cvmrnunity. The additian v# hvusing uni#s and therefore an increased tax base does nvt necessarily result in increased public park services for the communi#y. Other servaces cflnswdered mare vital public health and welfare (i.e. law enfvrcement, public sewer, water, and rnads, etc.) receiVe a suhstantially larger proportion of aVailable funding. Imaact fees may be auailable to suppiement park and cecreation fund'+ng if approued by the Baard of Cvunty Cammissianers. The project proponent wilf have ta sign a dvcument agreeirrg tv aray future impact fees imposed hy the 8oard of Coun#y Commissianer5 in arder ta get p►eliminary p1at approval from the County Planning Department. AdecisiQn by the Bvard of County Commissioners concerning the arnount and applicability of impact fees is expected befor+e the end ❑f the year. These funds cfluld be used tv heCp mitigate impacts ❑f the proposed development on tne Cvunty pack system. Wivvvever, established impact fees are not exp+ected to be significant enough to provide fvr park land acquisitivn any time in the near future. Shelley Lske EIS 88 (7ctaber 1993 3.4 Fira Protecfinn a. Affected Environment The prflject site is Ivcated wh411y w6thin 5pokane County Fire Protectiora f3istrict Nv, 1. District No. l's service bvundariss extend from Havana Street on the west to the Idaho stateline on the east and lie basically within the fonthill areas to the nvrth and south. Stations serving the praject area are all manned 24 hours per day by twa vr tFrree people. The praject vicini#y is currently served by Statiorr No. 5located at Sullivan Rvad and Brvadway Avenue, approximately vne mile narth of the project site's svuthern baundary. The aVerage res,panse time is estimated to be app roxiinately three min utes from receiVing the emergency call to arriving at the scene. Access rvutes wvuld he sQUth on Sullivan to 4th and then east on 4th to the project site. This s#atian Es equipped with a 600-gallan capacity engine #hat requires a minimum vf two peaple tv transport and operate. The station alsA has a squad truck containing first aid equipment and supplies. - 5ome respvnse could also cflrne from Station Na. 3 located at East 19200 ►o►ppleway in Gresnacres. The average respvnse time fram this stativn is estimated tv be approximatefy fiVe minutes. Access routes would ~be west on Appleway to 5prague, west on Sprague to Cvnklin, and south on Canklin to the praject site. This station is al5v equipped with a 600-gatfvn capacity engine, alvng with a brush truck. The four- wheel-dr6ve brush truck 6s designed far aff-raad fHre fighting and carri,es a204-gallon water tank. Fllfe DIStFECC No. 1 has plans to move Stativn hlv. 5 to near the Spakarre Indust►ial Park at SufliVan Rosd and Marietta Avenue in the Fall of 7994. A multi-,purpase vehicle that includes a ladder, pump, 8fid Wat@C taf1IC 15 prOplpSed f0r edditlC1f1 t4 tF1{S 5tetlpr`I following relQCativn. During the sarne 4ime frame, a new statian (IVo. 7) witFa a twv or three persan engine vvill be added at Er►ergreen Rvad and 12th Avenue. This statian will be lDCated apprvximately ane and nne-quarter mifes west af the project site and have an average respanse tFme Qf approximately three minutes. Access rautes tQ serve the northern portions af the project srte wili be east on 12th to 5ullivan, nor#h on 5ullivan to 4th, and west on 4th. Access routes to serve the svuthern portivns will be east on 12th to $ulliuani south on Sullivan ta 1 fithr east on 1 fith to Rotchfard, and north on RotchfaTd to the projeCt site. The new Stat@vn Nv. 7 will definitePy have first response ta the praJect site, hvweVer bath relocated Statian Nv. 5 and the new Statian Na. 7 woultf serve the dedelo,ped project. Same additivnal - response wvufd alsv be ❑htained frorn Statiern N4. 3. b. 5ignificant Impacts An additivnal 460 resedentiaP units on 123.8 preViousfy undevelnped acres w111 he added t❑ the respvnsibility of Fire mistrict IVo. 1. This responsibility wial be added Shelley Lake EIS 89 +DctQber 1993 ' gradually aVer an eight-to ten-year build-out period and wili nat occur immediately or at vne time. Approximately 50 units are expected to be develvped per year, depending on market canditions. The curnula#ive impacts of the propvsed actian may resu9t in an increased need for additional dnanpower and equipment in the area to provide adequate fire pratectinn. C. Miti$ating M'easures The deve9oped prvject wili have fire hydranis lacated according to County standards thrvughout the site to provide an easy and am,ple water suppEy fvr fire fighting purposes. The vn-site water system sup,plying these hydrants will be si2ed to provide adequate fire flaws and desigraed accgrding t❑ Spokane Caunty standards and the _ Cvunty Fire Marshaff. Residences and related structures will be canstructed in accardance with Spakane County Building and Fire +Codes and the Uniform Fire Cvde regula#ions for ffre wa11 constructinn. pestrictions on the aIfvwance af non-fire retardant building materials and vvood shake raufs vvauld help cantral the spread of a firs if dne were to ❑ccur. - First respanse to t he develvped site wauld be from the nevv Station No. 7 at 1 2th and Euergreen. If a fire were to occur in the saGthern pQrtivn ❑f the site, the fastest respunse #rom this statifln would be acCessing the site from the south off af 1 fith Avenue. I# na access to the site is prvvided from the sauth, fire response vehicfes frvm Stativn ~No. 7 wvuld have to backtrack to tYre nvrth and return south from 4th Avenue. This wouCd add several rrainutes to the response t6me to the site's sou#hern pvrtivn. Prvviding a southerrt access rmute would therefore keep res,ponse times to a minimum. Other vptions t❑ a fuii public right-of-way or private road to the svuthern paction a# the site were explared with Paui Chase, Division Chief of Fire Prevention #or District Na. 1, An emergency access raadway could be canstruc#ed and clased off with an electric gate. The Fire Department cvuld thera open the gate using their Opticvm system, whicM is a pulsating strobe atight that is used fv turr► traffic signals green during emergency responses. FCowever, police and ambulances coufd nut use this access route because they da not have access to the vpticom system. Crash gates and roll-over berms with Iandscaping cvuld alsv be a means to pravide access far emergency uehicles ❑nly. The Fire aepartment waufd not encvurage this type of limited access because a# the damage it causes to fire engines and vther emergency vehicles. Shelley Lake E1S 90 Octpber 1993 • , ~ •s.'r • . ' _ . , , ~ , ~ _ - ' • ` ' g ' ~ " ..~~k'. ~ ^ ~ - l , _ , • . ~ x _ ~ - : - - . ,T~' _ . ~ • " C i~, • - • _ , ~ ` ~ • . ` • j~._ ~~a_ _ , ` • ~ ~ , ' ~ . - ~ ~ , . ~ - ' ~ ~ ~ . ~ • - i " " . , _ • ' ' " • Y ' r. _ .rY " " ' ~ _ x ~ , J - _ ~ • ' " ' _ • • Y.f ' ~'.fi' ' , ~ . Pt. _ ~ . ' " ~ • ~ , . ' ~ pr ~ - ~ • .f Y ~ , ` . ~ ~ ~ ' ~-3• .'~S~ ' S' ~ . i f ~ . ~ . i . , • „ , ~ ~ ' . _ . ~ ~ ~ ~ f, - ' i s' ' F' ' : ~ F . . • _ . ' ' JF ~ N~.~_ " _ • , r~ • - • . . - " ^ _ • ' _ - ` r~ ~ { e _ - ' Y ^ 4 ~ ~ ! ~ - ~ , • - i. y:1~ _ ' . . ' a, ` ay • . T • - M1 3~ ~ . y . 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'V ~ ' ' . . - . ~ _ - , ~ - ' ` i~ ; i. 'F • ,~~f - f _ _ L _ ' . , ~ ~ ^ ~ ~ - _ - i • ~i . ~ . ~ ~ ~y " i 1f , I yy 1 r . ~ . ,x~eu., Y~ ' , 71 . a° x~•~ ~ s.~G Y4' e` , ` " , . ' ' ~ _ • _ ~ 1` ~ -r 'e ~ ~ _r. •;7 - r _ .LS f =k a ' ~L^" ~ ~•~r.t x~~ ~ ' . Y ' e ' r•' ~ " ' ~ . I .ays . - ' ~ . ~ h"~. . • ~ -4 _ _ 4 f - ~ 'r ' . ~ 4 ' r r ~a ~ ~ ' ! ~ . , ; ~ • C' . ~ - ~ , r . _ • . ~ i Y' ~ ~ , . P . . ~ ~ i ~ _ y.~ ~ , -r I v. F - - i ' ' , . - n ~ - ' N' • 'r o , r , • r• ± V ' " 'r ~ . "i ' Y' ~ : . - - ~ ~ - ' • • v - • ' ~ • 'i' _ , - „ 'r . _ . - - _ . • s: . , _ , ` 'S_ ~ • , , ' ' - ~ T ~ ° - k r r.~y - - , . ' • ~I ~ . ~ . • c • ` - . y - f ' . , ' - ..x F~V r : . 'V • . T'-7 ( ' .n ~YF~M• i~ r ~ ' ~ - ` ''N ~ . ' - [i = , ' _ } , a , ',r ~n ^ W ~ ~ 'S ~ ~ ~ Y - - • . . ' _ , _ F , " ' ~~F''•: 1 ' f v , n- ' ! - ' . ' - _ . , . " - L . r d tr'µ ~'~cw ~ . . , ~ ' ~ . ~ . • - y`.3 - ~ , ~ ~ " ~ - ~ yw-t . - . , , ^ •1' • f~+~`''yj;~„ <<~_' ' , - ' ~ ' ~ . n i - r fT ~ { . . _ - ~}J+r~ Y :p~~ r - . y ~ _ 4~f `rt~~. _e~ • .`i.Y' ~ J , ^ - - • y . ; E • " , _ , ' _ `_1 , F ~ • ^ _ , ~r W.~,`• - - , : . . z • ' ~ , , _ _ ,1 ~ • { ...r.; , ~ ' ~3' . • r ~ ~ ~ - , . ' ~ ' s' " °Y;.- ;,;._~•-r~~.~,.~~,., , _ . _ , - ;1 ' , • _ ' ' as~;•~ ~ • z ~ • . s ~ , • ' ° ~ - e ` ~ yy.~"~~~ _,y[~r..[•= ' _ • ..r.~r - - ~ d'~ - c~ .-'ax.-~M r - - . ` ~ • ^ . • ' . . v ~ - - . ` . -'1 . - +l,~r _r a; ~ 'a,~ a • ' ' ' ~ ~ ' 3 . ~..r _ - ~ ' . ' y . . ' ~ ' r , , ' , l _ . -:3 . R • ' i. ' . ' ' w ~ ' _v . , ~ 1 ~ . " i ~ . h. ~ ~ . • • ti~ ~t~,w ~9 •fi,' i~: • •N ~Sa 'dA" . , , 1~ , V f^ _ k ' i . ~ ' ~ • ~'.i•r.r;y . Y ~ r7n ir .w . 'k' ` ` " P' ~ ` ~ ~ " , ~ , • ` • `c,~`~ _ ' ~ k+ ` ~ , ~ t i ~ T-~~ F'q ~?Y . - • . I " " ' y 1 4',. Y: . ' - S ` ` ' ~ M1 ~ ` - ~ i j . ~ ~ ~ • . > '+L„ V' rt T tr y, H. . • _ , i. ! ' ~ • r ~ ~ , • • _ T Z • S. ~ ~ ti~ ' ~ ~ . , i_ C ~ _~.1 _ _ ' ~ ~ _ ' y 3 ~ ~ , 7 ^ r . _ ~ 'v • '!Y'~'y ~ _~~y'' r h Y1 A.`,~'Y~~ r . n _ • ^ l ~ • , , _ , " - n Y " a'', A _ ~ .L~' ~ F~1•{--' - .y . • . ~ ~ • _ , 'S"~ " ~ p;'r .a.'' y •~~t~r~~`.^ ~ _ ' _ _ - ~ . _ . 1 , ; ~ ' i• ~y ' L~ "y';~ ~"~`s`~ ~'y'' - . ' ~ _ Yr • . y- ' - , . _ ^ ~ ' - . -I ' ° ~~f.~ir, _ , ~ v- ' - •i~~ f'. "~"7; - ,c - ' - " - • ~ . . . " " - Y , ~ ~ n ' _ ' + , _f' , ~~,r~-:,.,,~- ~',~i. . „ • ~ , , , , • • ' , - ` , _ ,at~,.° ',Y~' . . ' _ "''•,t't~ ~ ~ ' ~ ~ _ ' • ' - • . ' i_ - . " ' „ ~ - , - • s - _ " `i.' ~ ~„=.5,,, - _ .r ~ .t-" n = r• ' _ " „ ~ • ~ ' ~ . -i T . S , • ~ . ~ _ r ~ " , f • ~ , f _ . ! • ~ V`~~~~ 4 ~Fv` ji y . _i • f i Y • _ .S , . ~ ! ' ~ ~ ' ~~~~4 ~ y. . } `kc. ~ {s.r~~9~~~~~,,_~,~-[:~~.k,`' i'y~~• ~ r' • _ tir• r „i ~ k. ~ ~ • I~ .5 e r=F ~ ~i - .r ` - ~ ~;'.'^.~^.~•15. ~ r ~ .y`•'r.{~~~"•SFx~.'-0'C~.e'4. `~r `~,,.,.n~ ° ~.'~,sr i~. : 3G~~' ~ ~ r • ,i . .'~'t 'r~af'~~':"~i- ~ r~ ~ < r- ~:r• -r . _:~~r= r..L~. i ~ . Miller, Stan. Spokane Caunty Engineers. Persanal communication. Ne9sorr, DaVe, Land Expressions. Persanal communication. Nvrwvod, Sandy. Washirrgtan Natural Heritage Pragram, Department af Natural Resvurces. Personal communication. Rbnea, Dvug. Washingtvn State ❑epartment vf Ecvlogy. Personal communication. Rice, Ralph and Lula. Praperty vwners. Persvnal communication. Skipwarth, 5teve. Vera Water & Povver. Personal communication. Soltero. Qr. Raymond. Eas#ern Washington Uraiversity Bialogy Departrr9ent. Personal communication. Spcakane Caunty. 1981. qpokane Countv Shoreline Proaram. Cvunty Shoreline Citizens ►a►dvisory Cammittee and State Department flf EcaQagy. Spokane County. 1988. Generalized Cvmorehensive PIan of Sookane County. Cvunxy Planning Qepartmerat, 5pokane, Washington. 5pokane County. 1990. Zanina Cvde of Sqokane CountNt, Caunty Pianning Department, Spokane, Washingtan. Strausns, ,lames P. JP StraVenslPianning Asspciates. Personal communication. Swehla, Kathy. Land Expressians. Personal communication. U.S. GeQlogicaa Survey. Greenacres OLiadranofe Illlai). Washinvton and Idaho (CQ-734). U. S. Geolagical Survey. 1988. T6ae Sookane Aoui#er. Washin+ptan: Its Geoloaic C7rlain and Water-gearinca and Water-Quality Characteristics. (Water Supply Pape{ 2265.) U. S. pepartment ef Agriculture - 5oil ConserVativn Service. 1958. Soil SurVev-of 5pakane County. • Washingtan State Qspartment vf Ecvlogy. Well Logs. V'Vashington 5tate mepartment flfi Ecology and U.S. Geolagical 5urvey. 1976. Reeanrraissance Data on Lakes in Wash9natan - Volume 7(Water Supply Bulaetin 43, Vo1. 7). Washington 5tate UniVersity, Oepartment of Anthrvpolvgy. Cultura6 Resource Survey Shelley Lake El5 92 October 1993 aLthe Shellev Lake Locality. Weis, Paul L. U.S. Geological Survey. 1975. Letter to Spokane County Planning Commission from A. E. Weissenborn. Weissenborn, A. E. U.S. Geological Survey. 1975. Letter to Spokane County Planning Commission. Wells, Kevin. Vera Water & Power. Personal communication. Williams, Tammie. Spokane County Engineers. 1993. Letter to Richard Mason at Inland Pacific Engineering Company. Wolcott, Ernest E. 1964. Lakes of WashinQton. Washington State Department of Conservation, Division of Water Resources (Water Supply Bulletin No. 14). Shel%y Lake ElS 93 Ocrober 1993 . . . .jtj - x } ` ~ - ~ ` . . ' a = ; 'i }V'. e ' r~ ` r • ' Yx Y ` ' „ _ ~ _ _ ~ , ! ~~;µ~s „ „ , - ~ ~ ' g . - _ " ' . - - ' - ~ " _ - • -i . - " _ J . ' _ _ y•, ' F . ~ ~ , ~ - " . . ~ ' ' ' , . f3? . - ' ~ R ~ , • R - ~ ~ - . ~ ; . , ~ ~ ~ < - • - " ~ ' : • w ° •rpr ~ ' ' S. ~ r ~ ' } c "1-. . . ~ '"F~ • ~ - ' ~ ¢ ' Y:- ' . _ _ k ~ t .f~ ts ti ~ _ ~ ^ i ~ ~ , ' _ . - ~ . ' : ~ . ° " A . S _ ~ - . . . R y~ • N . ~ ^ i h f ' ~s{]r.-' j ~ ~ a i ~r~w L~.~~3rn` I:. . . - ' - - w . ~ , ~ _ ~ . ~,^+t ' ..,~y 3• • _ ' l F n . ~ -d -.'1'.y ~f_}~ - . ^ . . _s[ ~i _ ~ , Y~ - y _ _ L: - s .~~CJ , ` ~ • ' ~ y= ' t~ _ s Y ~ ~ T~v ;~y _ Y ' ' . ~ . . ' _ , . ' ' 3 ' ` 1 ' - ~ ~ ~ =-t 'y'- ~ s~~ ^ r~a . - . = ~•~T;• ~x:x=r y~ ~ - - ~ , • - _ ~ ~ - ~ - , ~k:~~~:~_~ , - • . .'`Y- .P~ . F • ' ~ F' ~ ~ . . . ' _ i ' ' • . - . - ' :Y ~r` .,G - . . ~ . • .~~.G~. ^ " ~ ~ _ ~ _ r - -s". _ - ~6_ • . 15...5,,_ ^ , ~ , r H.i • .r ~ ' t _ • „ ' • i`" i I . ~ - ~ , S - ~ , . ' _ . . • ' _ . . ' ' ~ . . r - " Y Y , ' , - Y , - " . i . - -:S . S-_ . h . s~v.' .r;.,.. • ' _ - • , ~ _ y• ' ' f - . '~L•~ro~- Y~ . ~ ~o t- - ' - . _ x- ~ .J@,= ' •1 . . ,is ~ _ ~ Yr r~y`r _ ~ ' ~ ..~a ' - - _ ~ ~ • " ~ ~ , ~ - - . WA i r _ ` , _ ~ ~ , • ~ - ' ' ~ ~ . -~1-~*r k' •,=y~ - ~ r _ ~ ~-r ' ' L•i. ~ _ ~ s- ' _ .4•i. - . ~.J ~ ^t ' •'_~r,.~~I,.J- - ~ - `f .d F ' , ti 'tr' _ . ' : f J ' ~ . " r. ' - , , ry y ^c_ _ _ ' ; r t -~,y ; r` _ ` • . _ . • ' ~ • - , ~ ^_sr ~,;~d' ~ , .Y ° - • - , " • • , ~ _ - ' - . - • . ' • • ; Jr _ - , - ' ~ . ' , ~ ~A~ ~7' ` - . ~`;1 A ~ - ~ ,,;ti ~ - • ~ _ ~ .:T. . ' . . _ ~ y , . s , 2 ~ ~ i ' ' f ~ f~ -F. r~'4_ ° . ' • _ ` 3J T~ V.' - ' ~ ~ ~ F . , - , , ~ ~ - ' 1' _ ;.t ' ~ . , • r . ' ~ ' ~ ' . r.f • . _ ' ~ - - _ • x ~i ~ _ ~ ~ . ; , . x . i a . , - - ~ , M1 ~c•- } Y• ~ . - ~ ~ ~ V f , N ~ ~ . 1~4' ~ ' •~~f: ~ TcAR~~ -I. - ' n y + ~ ~ ~ • ~ . ~ { ~ . •7 av ~ :~.r ~ - ~ 5y" - Y ' ~ ' ~ , ~ ...5.- . " _ - - • "3 ~ x-S , - . ~ _ , Ci '.a ; . - 'J . ' a+., -z .S `y, ~ ' r ` ` . r ' y ' , ' Y ~ . ' f.' 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'S ~ .li ~ ~a ~ _ ' _ , . _ , ; ~ •d--k+..- _ . y.~• ' ' ' . ~ " ~ - • ' ~ ' 'P , • .'f~ e ~ ` - 'Fy ` " at'~''~~•~,•~~ , ~ [ ~ ° rv r}^ :~Y~ ~f e . , ~ i ' ~ ~ ' f~• ' ; ~ F - 'a ' _ ~ r z ~ 'y ` k' ~ . . a `~,,1_ `'A~ • • S'i. ~ ~1 . . • ~ v]° , . ~i s , , t ~v,c P` _ ' ^ . _ 1 n - ~ • • ' . •r ' • 36~ .F - t - - , ✓ - - . c ~ , " ' " C . ~ .ih. 5 .i',^~ n . ~ ~ ~ . - . ~ • ~i ~7e . _ _ - . . ' ~r^ 1~ . ' ~ f . _ S i . a ~ ~ _ . " " ' ~ ~ . . - _ • _ - • ~ x• " t' ~ • ' ' " ~ _ ' • ~ i ~3 ~ ~ ,}r •2lA~i..~c,` .~'r ~ r• 'f y • ~5`'~":~ ~~,e•Y~_i~` ' ' i - ~ , , _ _ ~ • ~ ~ . ~ _ .~t• ~ a~ ' , ~ 1 , . ' ~f' • Y'. ' ' . - - . ' . ~t' _ ' _ . ~ r " •j_ - . •z, sr ~ ~s -,r' ' ~ e- ~x ~ ' - • . . ~ • - ' - r~• _ . ' ' !yx ~ " i - . ' y " ~ • . - ~x, ~`~y~s,~"~"~Y?A;:~r.~~:~' _ - ' • " ~ ~ . ,r" 'c , , r' . , „ . - , . --~u`i~` ~ r" N . I . -c t~~ i•."~'. f `i - . , , 4 _ _ , s' ' - . ^ _ . _ 4 _ . ti• $ i-,.~.~',A:L ~~i~ :~s . - . - ' ' ~ 'v'S• , - ~ s ~ Y^~~.. , ' - Y~~ ; e_ ~""rra:.,~. - - - ~ , ' , ' --y- - ' , - . ' - _ . , ~ k:, .'-x;. ` . 'z'_ c~,~~ ~,F; ~y~~-'a~z~~ • . ~ , , •F~ Y, _ • • L , ~ ; _ L~ . a' ~ - . - , _ • - ~F` ' -r ' . ` ' . • [ - • ~`3:. 1s~-` ~g " ' _ r - ; • _ ' ~ ' ' ~F ~ k ~ . ~ ~ ' ~,,N ~~+'•Sx~F.t _ r a . ~ ~ ~ •r4 F r ~ . . i . ~ - _ • ' ~ 1 I ~Yi _ " i :f' , - _ _ _ , f e • . _ ~r , . ' t ~ . , • "t ~ •~r_'`"5 . - t • , - - . M . . :v - ~ e ~ - , ~ ~ 'x . 1 ~ - ;y a - . '-,s' ii -t ' . - ~ • ~ . ' ~ • s - ~ i - ~..~sw.~`~ti~n wr, - , - ' ~NY4 . ~ ~tiy. . ~ , • _ ~ . ~ , - ~ o„ . rf. 5.'~"" ~ Y: 1+ , , - " , - x - Y~ ~ , ~ _ ! , , ' ' _ ,f,~ , ,iy• _ , - ' - • _ - ~ '1 ~a - - - ~ ' - • Y . _ ; - . . ~ - 'r.., ~,r~ti 4 ~ ~~,r_7y _ ` . ~ • . - - - ' - • , ~ ~e• ° ; - qs' ~'s [ ~ ' _ • y J . ` ' " ' . ~ ! ` _ - " ~ " , , ~ . L. y~K-• J ~ . Ty .F.C ~ • ' _ _ ~ - . ~ "i .~r~• ~f ~ S! _d~y?~!1 _ ~ .S`~^" ~ " , • ~ ^ J _ _ - ` . ~ Ait - ~v ~ _ `-~~C'~r~S. ~ - f ' _ , ' - . - ^ q• ' ` r ~ ' ' ,}~V _ . _ ~ _ • ` ~ _ - } r ' •µ~.~F ~1". ` ' ti ,•'a. xA~v~' 4-.c~ - - .f'. . y , ` • . , _ _ ' ` , - . •~i` ~ F ~ , . , • _ ~ . 9; b~- r' , . " ~ •'.r - ' t ! • - - ~ ~ - ' . - . ' . . , ' .s- . - • - . -i; 4• ~ ' r ' Yi'~.e. - ' - • ' ,i ' s ' . - i- ~ , .rT,~, ~ 'i k ' ' • _ ' ~ ~ ~ - , . ~ • . „ , L ''F . i.' , y-' - - £ • o%ac~:•:~ - ~ ~ ' y 5 _ _ ~ ,y 3NF*~Y`:~2 ' _ . v.~ - _ r " • _ ' _•P ' • , ' ' ~ ~n r ~~i • ~ - T~~ . I~',~~J-•' - e - ' ' _ " . ' ~7~ s~ ' T-~ ~~~1~3~ ~ _ '-"'S . _ " -..rr~ ^ { ~ _ ~ - , ~ _ - • ~ . - " 1 : ~ _ - ' ' _ ~a - ~ . g' - ' ' . , ~ . ` ~ , , " ~ - r -r .,5~.' " l--•f ~ ' ~ • _ ' • : ~-r..~°'..--.:' . - - - - . . ~ ` _ , ' „ " - a~ ~.!~r-A!~'YyY• ~ ~i • r.~ z=~ . ~ - ~ ' " Y ~ . ~7: r.iri.' s .-~f~ . yy. l+t",~~~~~- 4T+Y ' - . ~i _ ~~r ' _ ~y~.t . 'r ' V ~ ~ • ~ ' s . p - n , s - ^ ~n _ = J ~.,'J' ~ ~^~ss,.. T~+y f~I~r _ L ~ - .,N~~~, Jr' ^ ~ A ti ' . . ; ' . - • , ' " . , M11 Y , ' y7( ~ " ~1 ,F'; jwxn~~~, a,~ R' i ^ i~ . w•~ '~yx ^_d''•,rY]-y: 1•~"•~• ' _ _ . ' , • ~ . . _ ^ ' - . ,t ~ k~N~:~~`L5Y~tirk'^_ l y r a.' ~ ",r"q 1 _ ~ • s , . _ , ~ ' ix r~~,:. 4- . ^ ~-y ' a~;~r"x.r' . ~ _ y' • -i . _ _ - - _ , •~`3'~.6y4xa • i' ~S' _ • a' "hy,~.v~°~'^eF.~• '~"r ~ ;~,~y DISTRIBUTION LIST WA State Department of Transportation 2714 North Mayfair Street, Spokane, WA 99207-2090 WA State Department of Ecology, Environmental Review (2 copies) Mail Siop PV-11, Olympia, WA 98504-8711 WA State Department of Ecology 4601 North Monroe Street, Suite 100, Spokane, WA 99205-1295 WA State Department of Wildlife 8702 North Division Street, Spokane, WA 99218 WA State Department of Wildlife, Nongame Program North 600 Capitol Way, Olympia, WA 98504 WA State Department Health, Water Supply and Waste Section Mail Stop LD-11, Olympia, WA 98504 WA State Department of Natural Resources, SEPA Center Land and Minerals Division, Mail Stop LB-13, Olympia, WA 98504 WA State Archaeology and Historical Preservation 111 West 21 Avenue, Olympia, WA 98504 WA State Natural Heritage Program Mail Stop EX-12, Olympia, WA 98504 US Department of Agriculture - Soil Conservation Service 316 West Boone Avenue, Suite 450, Spokane, WA 99201-2348 Spokane County Health District, Steve Holderby 1101 West College Avenue, Spokane, WA 99201 Spokane County Sheriffs Department, Larry Erickson 1100 West Mallon Avenue, Spokane, WA 99201 Spokane County Division of Buildings, Tom Davis 1303 West Broadway Avenue, Spokane, WA 99260 Spokane County Division of Utilities, Bill Wedlake 1026 West Broadway Avenue, Spokane, Wa 99260-0180 Spokane County Division of Engineering and,Road, Pat Harper 1026 West Broadway Avenue, Spokane, WA 99260 Shel%y Leke Ociober 1993 Spokane County Air Pollution Control Authority, Mabel Cain 1101 West College Avenue, Room 230, Spokane , Wa 99201 Spokane County Parks and Recreation, Sam Angove 1115 West Mallon Avenue, Spokane, Wa 99260 Spokane County Conservation District, Agricultural Center Building 222 North Havana Street, Spokane, WA 99206 Spokane County Prosecutor's Office, Chief Civil Deputy 1100 West Broadway Avenue, Spokane, Wa 99260 Spokane County Public Library 12004 East Main Avenue, Spokane, WA 99206 City of Spokane Planning Manager 808 West Spokane Falls Boulevard, Room 250, Spokane, Wa 99201-3333 Spokane City Public Library, Main Branch 906 West Main Avenue, Spokane, WA 99201 Spokane City Public Works Department, Design Services Section 808 West Spokane Falls Boulevard, Spokane, WA 99201-3333 Historic Preservation Officer, Property Development Services 808 West Spokane Falls Boulevard, 3rd Floor, Spokane, WA 99201-3333 Spokane Regional Council 808 West Spokane Falls Boulevard, 4th Floor, Spokane, WA 99201-3333 Spokane County Fire Protection District No. 1, Paul Chase 10319 East Sprague Avenue, Spokane, WA 99206 Central Valley School District No. 356, Dave Jackman 19307 East Cataldo Avenue, Spokane, WA 99016 Spokane Transit Authority 1230 West Boone Avenue, Spokane, WA 99201 Valley Garbage Service 11700 East 1 st Avenue, Spokane, WA 99206 Vera Water and Power, Kevin Wells 601 North Evergreen Road, Veradale, WA 99037 Rotchford Acres Neighbors, Deanna Hormann 1319 South Shamrock Street, Veradale, WA 99037 She!ley Lake October 1993 Appendix A Storm Drainage Commentary r , 1 I - STORM DRAINAGE COMMENTAtY FoR , ~~~~LEY LAKE P.U.D. SEP1'EMSER 1993 ~oy Ss ~ A.~ ~ ,~~2~ss5 .t+ G~cTH~ ~rl • 101*FAL'~ ~'43 ~E}4PIS^,ES Prepared By: Inland Pacifi'c Engineering Corrtpany 25 S. tlrtamvnt S,pmka~ WA 99202 (549)535-1410 - Project Description The proposed plat of Shelley Lake P.U.D. is a 123.8 acre' planned unit development comprised of 264 single-family residential lots and 196 multi-family residential units located east of Sullivan Road and south of Sprague Avenue in Section 24, T.25 N., R. 43 E.W.M. The topography of the site varies from gently rolling at the southernmost northernmost portions to steep slopes along the lake frontage and along the east boundary. The project's most prominent feature is Shelley Lake which is bordered by the proposed plat on all but the east side. Shelley Lake acts as a natural sump area for seasonal flows from Saltese Creek which drains a fairly significant drainage basin to the east and south. Since Shelley Lake has no natural outlet, all stormwater which enters the lake is disposed of through percolation and evaporation 100-Year Flood Plain The 100-year flood plain elevation is defined as the water surface elevation that would have a statistical probability of 1 percent of occurring in any given year. A 100-year flood plain elevation of 2027 (USGS Datum) has been established by the Federal Emergency Management Agency (FEMA) for Saltese Creek at the Steen Road bridge which is located upstream of and to the east of Shelley lake as shown on the attached FEMA map. Elevation contour 2027, as indicated on Attachment #1, is proposed as a safe elevation in order to establish minimum finished floor elevations for lots adjacent to Shelley Lake (i.e. all finished floor elevations will be at elevation 2028 or higher). Located northeast of the site is a natural channel leading to the Spokane County/Shelley Lake Gravel Pit which acts as an emergency overflow for Saltese Creek and Shelley Lake. Because of the nature of the site and the fact that the topsoil has been removed, the gravel pit is capable of tremendous percolation rates estimated at 500 inches per hour. For this reason, the channel and the gravel pit should be preserved to provide a margin of _ safety for controlling floodwaters. As indicated on Attachment #1, the only building lots which lie within the 2027 elevation contour are Lots 33 through 36 in Block 1. Soils 'I'he attached Soils Map, obtained from page 76 of Soil Survev for Snokane Countv. WashinLyton, shows that the site primarily consists of Garrison series soils which are gravelly, somewhat excessively drained soils typical of the Spokane Valley. Also present on the site is a very small area of Spokane series soils which are well-drained, moderately coarse-textured soils overlaying bedrock. Stnrmwater Dispvsal ' i I Other than the Saltese Creek watershed, the prvposed project site dves not cvntain ariy majar drainage cvurses~ The ten-year design stvrm runaff frvrn tacalized vn-site basins will be disposed of using '208' grass percvlation areas and drywells in ac~rdance w~ith the Sp~kane Cc3unty GUidelines for 5tormwar Management. The snils on the progect site as indicated on the Soils Map are compatible with the use of drywellsl and grassy swa1e5. 'I'he Variable topography of the site wiU likely result in avariety of methods to capfiure and dispose of runaff from the rvad impervivus surfaces in arder to provide '208' swale areas which are acceptable fram the standpoints of iconstructability, maintenance, and aesthetics. In order to mitigate many enviranmental impacts cancerning the lake, a111 direct nanvff fram the devslapraientl will be isalated fram the lake. This will be accvrnplished with the use of grassy swales canstructed upstream of the trail access as shv►~vn vn .Attachment #1. A tyTp~icai sectican depicting the access trail and grassy swale configuration i5 shawm on Atrc~chment #2. 'Tbe lake will he protected during construction thraugh the use of te~parary erosivn cvntral measures inciuding silt fences and after constnuctivn by reseeding excavated and vther disturbed surfaces. • ~ ~ Canclusions 1. Thraugh the use of respvnsible starmwater management practices, the environmental integrity of thre Shelley I,ake site may be maintained in the ° propased developed canditian. 2. The 2027 elevation contour a;s currently established by FEMA for Saltese Creek at Steen Raad can be safely used as 100-year flcrvd eleVatian araund - the lake. ~ 3. The site contains no other riiajor drainage basins. - 4. 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F ~ i,YPPT~; 4y~ R~~ 5iy ~rNcA~;i~Y i"a. i.q ~''~i;i' ~~~41 ~Rs6 ~ Tr', ~.'-;i~ r' , . ~ ~{~n-' Y'~ ,~i ~ti fl r~ t~ ~ :i ati*. '7 ~a?. r .,,aM1:"s~`• • e ti--t s` '.r,~,"'~~.*~ . ,'s': ~ r I' . z, ~ ^ p ~pd,. J ~ . v.a~ . e_ _._._.1~':~~'k; ~.'L"~~---~:_ _ :ti. ~ n B y .~'j";, '°,1M x~. hB: ~i. SO_-IS MAP ~ ~,~._~"~~r't•.,~v- ;j"~, f;, ~ t"~ ~ ■ ~ , wrt` : ~ . ~ CUT(7FF SWALE PROPOSEI3 PEC}ESTRIAN TRAIL SHELLEY LAkE ExiSTING GROuND n 1~~ ~A~:I~~~ ~ ATTACHMENT #2 INL ENGINEERING TYRICAL PEDESTRIAN TRAIL AN❑ CUTOFF SWALE 5vuth 25 Al#omant 5pok6ne,Wcshlngton ~ ~ . . ~ ~ (509) 535-1410 99202 Appendix B F/ood Hazard Lettei r ~ EE , I5 ~ a ~ A I~ r C~ U U I~1r T Y' C]FFICE oF Tm CC7U:rTY E\GI~EER ~ A DI1a15Id1+7 OF nV POUC WORKS I7EPi ART?v~ti'I Ronald C. Hornlann, P.E., CaurLty Ea&eer Demtis',vi. Scvtt, P.E., Director - Sepferrsher 27, 1993 Rieaard ylasan Jnl2iid Paciftc Engineerzng S 25 All'iililcint Spi}kaIle, W,A 99202 Ttus ItLcCr is tn address the flaodpsain conccrns we haWe vn the propOSed devclvpment at Shef1eY Lake_ The t]ond zone in this area is ari "Un-numbered AZone", which meares that a detailed study has not beert campleiecl Cor the lake to esrablish the 104 year fIvad elevation. Since the ilnnd zone dzpiCiGd oci rhe m3p aroutad She11ey LakC is IIvt acCUr3te, a&tudy wuutd be required tCr delineate the botE;xdaries arad fhe e1eVation oF the 100 year flood event. (]ur files sliow that duxing a 1948 cHinaak eMeiu, the lake overflawed and vvas observed flowing across 5ullivan and CQnl-Jin Roads. To help stem damage to private property and public roads aa overf]ow was cvnstructed tn autlet the ftondwater "r.nt4 5treea Pit. Wc will require thac an easement(s) bc secured which will allow ovecfinw floadwaters to reach Stieen git as a eonciitio€t of this dewci17pmCIll.. Adicch wi2l need to lye designed -md constructed in this ea.sement which will be capable at passing u,verflow flaodwaters. The easement inust also allUw maintenanct velsicies tu access the pit frvm the Cr,uni3• Road. Tlaese cvnrern,S need tn be adcIressed in the SEPA document thac is being prepared for the prr,ject_ A plan for the anainteaaiace af this ciitch will alsra aeed to be outliried in rhis enviTonmentaI rlocument. You inquired 3s to whether the flood elevation east of Steen Road cauld he used as a flood elevation • f4C thoSQ piill'C15 155t7Ciaied W3tI1 iY!@ fl44dp1a1n dT013nd the 13ke, instead ot completing a t'luod study. Thic elevation, establish,ed by the Federal Emcraency Mandgerfaent Agcncy on the Flood Insurance P,,,e L1apS (maF #530174-0314B, 5I17188), is 2427 NGv13. This elevation, upstzeam nf Shelfey Lake, wi1S bv a adequate if the above meiitioned awerflaw is establishecl. Ali lvts that have land belaw elevation 7028 (1 foot aboue flood clevation) wiil be reqkiired to ub[ain tloadglain dcveiopm$nL peratits privr to development of the 1at. 'I1iis wilt require a survey caf the prtiperty ta establiSn contotir lines wltich will identif~, which lot5 wi2I net!d tp obtain flvodplain dev.-lcrpment permits. Sineer~ly, _ ~ J' {s~,.•~ ~ ~-1"t ? Li Lll,~~•~ Tam«,e Witisanls F~oodplain AdministzaLqr r: Joilai Pc=dersan. Spvkane CountyPlanning 1^I 1026eruaalti•aG• ,1ve Spnkane. kVr3 99260-0170 (509) 456-3,00 LA\ (549) 476-4715 Appendix C Cu/tura/ Resource Survey Center for Northwest Anthropology Contrihutiors in Culturel Resource Management Na. 46 - CuItural Resource 5urvey at #he 5helley Lake LacaTity, Spakane Cmunty, Washingtsn _ bv Alan D. l7ePew - SRIT15 COLlIMBfA/") _ e The Cehte'r.for - ~ I ~ No thvvest Ahthropvlagy _ ,~,j calutnb'C' R1 rer fDAtiC] - ~ OPEGc7N ~e ' i i ~ l~ . I - ! Coneributions in Cultural Resource Management - N0. 46 Gultural ResoUrce Sur►rey art the Shelley Lake Lacality, Spwkane Cvunty, Washington . - by APan D. Deh-s+a CENTEkL FQR NaRTHWEST ANTHRUPOLC)GY WASHINGTQN S'I'A;CE L]NIVERSITY P[TLLiVIAN, WASHINGTQIY ' PREPAREA FQIt: 1tAMM ASSQCTATES FUR N&H INVFS'I'MENTS , SPC)KANE, WASHTNiGTON AUGU5T 1993 I ACK,NOWI.EUGEMENTS 5everal individuals deserve mention for their role in the cvmpletion of this prvje.ct. Patti idivf of Ramm Assvciates was the focus of interactivn between that vrganizativn and the Center for Northwest Anchrapalvgy. William Andrefsky, Jr., i3irector vf the Cerater far , Northwest Anthrvpvlogy, was the F'rincipal Investigatar and pravided adwice coneeming both the field operation and repvrt completion, T]ave Harder played an important rQle in hath pre- _ and pvst-survey vrganization as wetl as survey crew supervision. Alan DeFew organized the fieid wvrk, aided in field crew supervision, and wrote the final repart. The field crew was composed of Kaz Czerwirislci, Jack Grey, 7oe Maril, and Lisa Meyer. A,lthaugh this praject was relatiuely sma,Il in scale, ali vf the individuals mentioned aboVe piayad irnportant roYes in allawing successful and trouble free campletian of the job. ~ii TABLE OF CONTENTS Acknowledgements .............................................ii CHAF'TER PAGE i axfrROaIICxxarr - purpQSe and Scape of Wdrk ...........................1 Management 5ummary ..................................1 2 PAOJECT LOCATIDN AND HACRGRDUNd - Project Locatic►n ....................................3 EnViranment .........................................3 ~ Cultural Histvey ....................................4 Histaric overview ...................................5 - Previaus Archaeological Research ....................s s AtCaAEOLvGIcAL strRVEY Introductian .................................18 " Methods and Results ................................20 4 CONCL[JSION$ ........................................18 R'EFERENCES CITEp ...................................19 APPENd~X A ........................................A.1 ' iii ; LIBT OF FYGLIRES PAGE Figure 1 Location ❑f the Shelley Lake Prvject in Spokane I, eaunty, Eastern Washingtran .................,.........2 Figure 2 Map vf the 5helley Lake Project Area 5howing ~ Boundaries of 5urvey Areas Mentioned in Text........ 11 Figure 3 Photo Dverview flf Survey Area A with Rice's Cvuntry Meats Buildings in Sackgraund (View to Southwest) 12 -Figure 4 Photo of Rice's Cvuntry Meats Building (View ta 5auth) .....................................12 Figura 5 Photo af Rice's Cauntry Meats Suilding (View tv East) ......................................13 Figure 6 Photo Overwiew of Eastern Edge of Survey Area B (View to North) .....................................Z5 Figure 7 Photo Overview ❑f Sauthern Part Survey Area Cand Eastern Paxt of Survey prea D(View ta 5outheast) ...15 Figure 8 Photo Dverview of 5urvey Area U(V1eW to South)..... Y7 ~ - ~ iv CHAPTER 1 INTRODUCTION PORP03E AND SCOPE OF AORR This report presents the results of an intensive archaeolog- ical survey of the area immediately surrounding Shelley Lake in Spokane County, Washington (see map, Fiq. 1). The survey was undertaken as partial fulfillment of a contract between the Center for Northwest Anthropology of Washington State University and Ramm Associates of Spokane for N& H Investments of Spokane. The survey was conducted by members of a six person team from the Center for Northwest Anthropoloqy on July 23, 1993. The goals of the archaeological survey, as stated within the Scope of Work, included a surface survey for cultural materials. The surface survey was to be augmented by subsurface testing where low surface visibility might impede the discovery of cul- tural material. Site locations and horizontal boundaries were to be determined for all cultural resources located, and recorded on replica USGS maps. Additional aspects of the Scope of Work included production of a progress report within 14 days of contract execution and submittal of a final report within 35 days of contract execution. The progress report was submitted to Patti Idlof of Ramm Associ- ates on August 2, 1993. This final report represents the comple- tion of obligations stipulated in the Scope of Work. MANAGEMENT SOMMARY An extensive surface survey of the project area surrounding Shelley Lake was conducted on July 23, 1993, by a crew of six people from the Center for Northwest Anthropology of the Depart- ment of Anthropology at Washington State University. Surface survey coverage, consisting of regular transects with 5 m to 15 m interval spacing (contingent on specific situational needs), was auqmented by the excavation of 116 shovel probes, varying between 15 cm to 57 cm in depth. Most of the area has been disturbed by construction and operation of the Rice Country Meats facilities and the associated plowed fields surrounding it. No evidence for significant cultural resources was identi- ' fied during the survey. A single end battered cobble, located southeast of Shelley Lake, represents the only possible prehis- toric cultural artifact. As such, the proposed project should not adversely effect cultural resources. In the event that archaeo- logical materials are encountered during the project, a qualified archaeologist should be notified to assess the significance of the discovery. 1 ' ~ ~ .Y.AFCQY - ~r n , ~ 59►,rioaaee rgRRr ~ s7evcns ~ ~ ~ P- ucn- - - - , ~rw onuLu I ' CE►L~4~~ , Y SMCMOWSi~ - _ , _ - _ _r y~ OMAN 1 +irransau - - _ - - - • _ ` , y ~ o6u6us . i ~ v y _ _ , - - ~ _ . • - .+HCQtm , srouw~ ~caRra rup~ i i • t - ' . - , a"w A - - -o i ' d4 - - ~ - h - ~ ` - ~ - - ~ ` - o ' _ umrws ~ ~ cwwr ~ A eiucl~ , r _ _ , ti •DAW eWn+rw,w •~T T".varrcm' i ~ ' s►s~nc- , - - ~ . _ _ ; - - - - ' , . _ ~ I . • FNAM{LW • ~ ~M3FIiLG ' •J~W SEWTUM ~ . rr~~u w~.► ; ..sQnx 1~ - ` --~7 • S SlJC[IiAT NASHfNG7C7N CyRiFRi - ` ~ ~ I ~ r . 2029do . • . . . ~ . . . . . --~r d.--rAtlCf.a.:~~ ~ •a. ..I. :rH~ ~ _ i ~ m~' . s.....,~ Fa, ~ ~ ,'l~~ ~ e00+1* ve 3 , +i~:~'.. . . , .....a-_ tna«./;...~~.••~'t`;?..' ...ui i ~ . ~ ~ i. t ry~.-~ ~ »}-T :_~N ; • , e, :I~wl~~;e • + ~ ~ ~ - • : - , • ~ .~~a'1• J rP~A~a' I~ - ~64=.~;~:.w.• ~ ; Gse~rclFryr, erH '1.. AYE I .~rc:~ ....i i ~ . . . ay . • .'i,~ PBfk i P ° • ~ ` ~ L~ I, . i V ir Lm■ . ~ I. '~t ~ ~ • • . . ` I~ ~ Ctau'a~~Vaklrr . - ~ 2~' 11H~a'~~ Se, '3~v " • . ir . M ~ ,,y?c8a v. . . ;i j • ' ' . . ~ ••fi , JG(•., . . . . . . , ~ . . . : ' f_~ avA ° ~ ' • . ;~~;ry~8!'~~,~, - I t 1gS..1T'e r C3C3t'LOri pt the 'Sfle! ?eV Lake PrC3] eCC iri SpokaT]e CDi1riCy, -35,t:2rtl kvaSIllTIgtoI1. ~ ~ r CHAFTER 2 PRDJECT LOGATIaN AND HACAi3R0IIHD PROJECT LOGATION The 5heliey Lake praject area is lvcated within Spakane county of eastern Washington (Fig. 1). 5helley Lak+e is a small (appraximately 25 acre) pond lacatad south of the 5pokane River ~ (river mile 88) and Interstate Highway 90, approximately 9 miles east of 5pokane and 20 mi les west of Coeur T7' A1ene . The praject area falls within what is typically referred tca as SpQkane Val- ley, or in historic times as the Spokane Prairie. Access ta the prvject area is south via the SUllivan exit from Interstate Highway 94, and east ❑n Faurth Aventze. e EN9IR[']NMENT The project area accurs wfthin an ecotvnal setting hetween the Northern Racky Mauntain Pravince to the north and east, and the Columbia Basin subpravince of the Calumbia Tntermontane FroVince to ttae sauth and southwest (Allison 1968). The transi- tion from coniferaus forest to grassy steppe results an a largely apen coniferous parkland envirflnment. Ecatanal areas are typical- ly cansidered ta possess a wider selectian of resources, contain- ing elements of bvth ecasystems (Odum 1971). Thoms (1991) states that the Middle 5pokane River Valley as a whale wvuld suppart oniy moderate populations ❑f game animals and fish species, but would still have had greater productivity than surrounding areas. Most of the area is classified to the Pinus-Festuca (ponde- rosa pine-bunchgrass) vegetational zane {Daubenmire and Dauben- mire 1968}. The farest cammunity is characterized by varying mixtures and densities of ponderasa pine (Pinus bonderosa) and Douglas Fir (Pseudotsuaa menziessi), and sparse undergrowths of bunchgrass (Festuca idahoensis) and waQdy shrubs. The present forest ecosystem appears t❑ haVe expandeci into the area sametime laetween 5,[]00 and 2,500 years ago (Mack, et al. 1978; Mehringer 1ss5). The occurrence of the Spakane River and ❑ther water badies nearby provides same riparian affects t❑ the vegetation ❑f the area, such as the increased occurrence of woesdy shrubs and grass- es, but this effect ditninishes aas ❑ne moves away from the river. The increase in vegetativn prvwides greater amaunts of feed fcar animals, typically resulting in relatively higher animal popula- tions ❑r concentrations, as well as increases a.n berry and other vegetable crQps. weathex patterns in the middle part of the Spokane Riyer ' Valley generally consists of dry and mild summers and cold humid winters. Precipitatian accurs mainly as snowfall during winter, ~ and averaqes 17.5 inches per year. Precigitation fQr the area mirrors the vegetatianal pattern as being transitianal frQrn the ~ 3 ~ ~ drier areas to the south and southwest and the more maist envi- ~ ronments to tYre narth and Ieast. COLTIIRE HISTORY I • Numeraus cultural historical sequences have been postulated for the Galumbia Plateau~ Most are huilt on interpretation of excavativns conducteci in localized areas. Sequences have been proposed for Middle Columlaiia (+Galm, et al. 1981), the Yakima area (Swanson 1952; Nelsan 1959), and the lvwer Snake RiVer area (Leonhardy and Rice 1970,1 1980), as we11 mare general regianal sequences (Daugharty 1959,i1962; Warren 1958; Brnwman and Muncell 1969). Each begins with a I1QCa1 variant of the Paleaindian period and continues thrvugh several phases which, despite ❑ften having different names, are remalrkably similar in their periodizatian. - The following summary is f1rom Andrefsky and Depew (1992;10-11) as adapted from Draper (1992:r2,10-2.11). The WiA$115t Phas~ dates from appraximately 10,000 to 8,400 years agQ. The diagnostic characteristic of this phase is a shorti kyladed , shvuldered lanGeolate point with a straight' t❑ contraGting stem and a st;aight vr slightly cancave base. Tvals assemhlages tend ta be dvminated by edge-mfldified flakes of siliceous materials. 6ther tools fvund in windust assembkages include kniVes, cobble toals, and hone implements. Bone and antler spurs suggest the use of the atlatl, and eyed bane needles indicate clvthing manufacture. Lithic taol manufacture invvlved the - extensive use of sili+cevus mateXials rather than basalt. N❑ dwellings have been found at sites of this age; the campsites have generai1y been faund ❑n upland, terraces, alluvial fans at mauths of canyons, and to a lesser ' extent in caves and rmckshelters. Present evidence suggests Windust peopl.e were mabile hunter-gatherers ❑r fcsragers whose subsistence was derived iargely from hunting deer, elk, prvnghorn, rabbits, beaver, and ' waterfaual; river ~nuss+els were alsa used. There is n❑ 'present evidence ❑f plant prflcessing equipment. The Cascade Phase spans the Qeriod from 8,009 to ' 5,000 years ago. ThisItime period is divided into Early (8,000-5,700 B.P,) and Late {6,700-5,000 S.P.} phases. i Althaugh both subphasles are characterized lay leaf-shaped , • lanceolate paints (Cascade), the Late gMase is distinguished hy the addition of large side-natched dart paints (Cold Sprangs). Stone atlatl weights and , tabular and keeled scrapers ❑ccur in assemblages for the first time. The preserice of fish bones and plant processing implements thvught to have been used fvr grinding seeds rather than roats suggests mare sedentary settlement pat _ terns. Even with this apparent braader subsistence base, ~ hawever, hunting appears to have cQntinued as the most important source of su~stenance. Bense (1972) suggests that ~ 4 li Cascade assemblages give the impression of groups becaming more adapted to their settirng, particularly in the use of lvca],ly available tvaistones such as basalt. However, mvre ' recent evidence 5LlgCfe5t5 that nanlvcal lithic nnaterials were used as much dr in greater frequency during this phase than were lflcal raw materials for making artifacts _ (Andrefsky 1992; Sappingtan and Carley 1984). open settings as well as rackshelters and caves were used as site locations during this phase. The TucasIIOe Phase is dated frvfi 5,200 to 2,500 B.P. , During this phase there is evidencE for increased sedentism 'I in the form af larqe Village sites and settlements. The artifact assemblage, however, appears crude and unsophisticated campared to the earlier and later phases in ' the sequence. Projectile paint forms cvnsist of types with short hiades, shoulders of varying prQminence, and contracting stems; the second most eQmmon type is natched an the side near the base or at the cvrner. Scraping tavls, net sinkers, hopper mortar bases, and pestles are also - cominan ta the assemblages. Bane shuttles indicate nets were manufactured. In addition t❑ deer, elk, and pranghorn, hisvn are added ta the menus af some groups, and river mussels are more intensiVely exploited. The Harder Phase dates from 2r500 years aga t❑ A.D. 1300. Like the Cascade phase, this phase is divided into Early and Late subphases. It is characterized by housepit villages and the semi-permanent winter village pattern. Prajectile paints vf-ihis phase tend ta be smaller and well-made. 5o called Snake River corner-notched points, lanceolate and pentagonal knives, martar and pestles r bane awls, ornamental beads, and gaming pieces are cvmmon ta many assemblages. The Late subphase is distinguished by increas ingly smaller point forms than those in the Ear].y subphase. Hafted end scrapers are commfln ta assemlalages frvm both subphases. . The ethnographic period can be thought af as a time that pvst-dates the acquisitian af the harse, whach in creased mQbility, and the additian af Euraamerican txade goods to the indigenous artifact assemblage. House pits of this phase tend ta be circular in plan-view. Artifact assem ' blages typicaliy cantain small evrner-notched and stemmed points, end scrapers, lancevlate and pentagvnal knives, edge-modified flakes and spalls, pestl.es and hopper martars, net weights, bvne awls and matting needles, campasite har poons, and twiraed basketry. . 5 ~ ~ I ; HISTDAFC aVERVIEW Spokane County pvsse i sses a rich histary Yaoth in terms ❑f . lDGal and regiQnal developments. A detail descriptfon af tMe area's histary can be faund in Larsan (1991), in which she di- vides the histary ❑f the ~area into three periods, including 1} fur trade ta settlement,, 2} earZy settlement, and 3] city of Spokane and Spokane Valley develapment. A brief summary will he presented here, with parjticular emphasis on events near the - project area. i The Spokane House, lacated near the canfluence of the 5pn-- kane and Little Spokane Ri.vers, is repvrted as the €irst Euroa- mexican settlement in the ~astern Was~ingtvn. It was built by.the North west Campany as a fur trading post in 1810 under the direc- tian ❑f Finan McpvnaTd and Jacques Finlay (Meinig 1968). It was located on a trai3 netwoxk which had heen used by the Native , Americans in the area andlcontinued ta he utilized by expivrers, missionaries, the military and ❑thers. A rival fur campany (Pacific Fur Campany) estahlished a past called Fort Spokane nearby in 1812. The Spokane Hause and Fart Spokane served as a focal pvint for travelersjin the NorthWest far nearly a decade, by which time bvth campanies rel,acated their interests to other parts of the NQrthwest. Przvate individuals cQntinued t❑ aGCUpy ' the sites in the years foiawing. i Antoine Plante built a ferry crossing the Spokane River immediately Narthwest af the praject area, credited as being the first non--7Endian cammerciial ferry in the area (Herglund 1987; Fahey 1988). In additian, Plante grew crops and raised harses and - catt1e, including several'milk cows (Peltier 1983), the surplus ~ of which he traded ta travelers. He also hired himself aut as a ' quide frvm svme of earli',est exploration in the area (Larson _ 1991), including GoVernor Isaac I. Ste`ren, during his search for a railroad rvute fram the, upper Missauri Rivex tv the Pacific ' ocean. I j - The 1850s marked a pdriQd of tensivn between Native Ameri- cans and Euroamericans iri Eastern washingtan (Peltier 1983). Hostilities began t❑ arise due ta widaspread dissatisfaction _ among the Native Americans with terrns of the treaties being ~ impased upan them, as well as with increased encrnachment by - miners and ather settlers.ismall scale hastilities af the mid- to late-1850s escalated inta a full scal.e conflict during 1858 , (Larsvn 1991). At that time the camhined fvrces ❑f the Coeur ~ d'Alene, Palquse, and Spokane Tndians defeated a paorly equippad military cantingent under Colonel Edward J. Steptae near Rasalia, - Washingtan. The Lt. S. Army response was t❑ send Co,koaael George Wright and 700 travps t❑ the area. They axrived in the Spokane Valley in August Qf 1958J A massiVe farce af Native American groups gathered at Spokane Falls, including members vf the Spa- ~ kan, Cveur d'Alenes, Pal►ause, Yakima, Kalispel, Pend C7reilles, Calville, Columbia, Okanaigan, and several Mez Perce. The lvng range rifle fire of the Army proved tv kae too great of an advan- ~ 6 °i , f tage, and the indians were seVerely defeated nn September 1, 1858, near the Faur Lakes area. over the next four days Cvlanel . wright and his traops waged hattle against the native farce along ' the Spokane ValZey, thoroughly defeatinq them and crushing the indian uprising. ~ The defeat af the Indian forces set the stage fvr su}asequent ~ develagment of the Spokane Va].ley. The first bridge crassing the Spokane Aiver was built in 1864 by A.C. KBI1da1l, who operated the ~ toll bridge at Spokane Sridqe near the current washingtvn/Idaho border until spring floocis washed the bridge aut the next year, - It was rekauilt by Timathy Lee and J❑e Herrin. A second "free bridqe" was built by Tsaac Ke}.logg in 1865 upstream from Plante's fersy. EVen sn, by 1872, the Spokane Valley area had anly a few permanent settlers (Uoyle 1932). Mast of these lived in the new communities at Spokane Falls and at Spokane 8ridqe. The town of Trent, lacated just narttt vf the praject area-, was the next center vf settlement in the area. It sprang to life , during the mi+d ta late 1870s, with its greatest development occurring during the period when the Narthern Pacific built their railrvad bridge across the Spokane River there in the tate 1870s. The construction of the railroad, which extended fram Du- ; luth, Minnesota, ta Kalama, Washingtort Territary, prcavided a double blessing far the Spokane Valley area. The initial benefit arose fvr the commerce assaciated raith the cvnstructian crews.. Boarding houses, generai stores, and saloons reaped profits for the men working on canstructian. 5ecand, and perhaps more impor- tantly, the railraad prrvided an access t❑ distant markets for hoth distributiori of thear groducts as well as access ta less ' expensive products. Numerous ather industries fueled the grawth ❑f the area, although most of these industries experienced a boam and bust cycle. A gold rush in northern Idaho and along the north fark af - the Cveur d'Alene River in the winter of 1883-1884 lead t❑ the development of Spokane Falls as a major outfitting and staging areas inta that area (Larson 1992:6.21). Ranching and farmAng played central ra1es in the early days , of the development of the Spokane Valley. Farming was limited in the ].ate 1800s due ta the limited rainfall in the area. Grain crraps were the majar products with most vegetable craps limited ; to persanal needs. At the turn flf the century, irrigation projects were undertaken kay the Spokane Valley Land and Water _ CQmpany, later called the Spokane Canal Campany (Larsean 1992). , The irrigation prajects used the waters of Newman, Twin, and Liberty Lakes as a means af supppsedl.y turning the shallvw, gravelly sails of Spokane VaJ.ley into prime farm and orchard , lands. The early part vf the 1909s witnessed an explosion in ❑rchard and farm development. For a short time, satne ❑f the farms experienced increased praduction, but this was ta be shart lived. _ 7 ~ ~ ~ ~ By 1920, lake level.s had d~rapped t❑ a paint which made the irri- gation systems useless. Urider4round water sources were exploited using wells until a diver5iori system fram the Spokane River was canstructed on bath the north and sauth banks of the river by prvperty awners in the area. The Spokane Canal, as the di.versipn system was called, was completed in 1924. Despite the success tlhat s~ame individual orGhards and farms were experience, by 1922 a~P became obViaus ta the farmers in the area that the soils of the Spokane Valley were inadequate ta suppart the hea~vy use practiced in the early 19[]os. The svils required heavy fertilizati~vn which raissd the cost af prvduction - t❑ a level which made the Venture barely profitable. People beqan cuttinq back an their vrchard size, often pulla.ng out entire archards. A heavy freeze in 1923 further complicated e€forts by the farmers. ; The final blvw to farming ef£arts in Spokane Valley was the depressian of the 1930s. Thvse who had managed to ❑vercome the ear].ier problems of changing markets and exhausted soils could not withstand the ecvnamic crash of the Great ❑epressian. Spokane J Valley shifted from agrieiiltural t❑ residential develapment. By the mid 1950s , residential develapment ttad all but totaily re- placed tne orchards vf Spokane Valley. ' PREVIQUS ARCHAEOLOGICAL AESEARCA , Very littxe systematic archaealvgical researc3a has been dvne , along the Spokane River. Research that has been done has focused on the area of the Spokane Hause-Fort Spokane complex near the junction af the Littie 5pokane and Spokane Rivers. Much ❑f the wark canducted along the Spokane River upstream from Spokane Falls has cvnsisted ❑f smaill field Su]CVeys, seldom incarpvrating extensive areas and rarely;resulting in the recQvery af cultural resaurces (Sensan 1979; Lindeman 1979; Lindeman and Rice 1981; Rice 197$,1984; SaIv 1986, Wesser1 1988). Recovery vf Gultural resaurces has largely beenjimited ta sites immediately bardering the Spokane River (Draper,iet al. 1991; Draper and Dlson 1991). 'Fhe earliest excavation reparted in the literature for the ; Spokane River were associated with the Spokane House-Fart Spokane site (455P5), which r,aas excavated from 1950-1953 (Caywood 1354). Evidence of the structures of the historic trading past were daGUmerited by these effarts. The area received further attentian - in 1962-1963 (Cambes 1954), during which time the location of Fort Spokane was confirmed as well as documenting the presence of ; a prehistaric presence inithe locality, althaugh the histaric campanent was the focus ❑freffarts. I AnDther prehistoric site (45Sp92) was lacated approximately one mile upstream frflm the Spokane House/Fort Spokane complex. only Iimited surface colle!ction and minor testing has been con- duGted at the site (LarsQn 1985; An+drefsky and ❑ePew I992). , y $ ; ~ ~ - Recovered artifacts suggest a late prehistoric/protohistoric component. An addition project worth note involved limited docu-- mentation of a pithouse locality (45SP37) on a terrace near Deep Creek (Bryan and Swanson 1952). Some minor testing was performed at a site (45SP6) near Spokane Falls Community College in 1973 (O'Neal 1973). The test- ing was done by students under the direction of Jerry O'Neal of Spokane Falls Community College. The site's assemblage suggests periodic use over the last 1000 years. _ Numerous sites have been recorded in Riverside State Park (Larson 1987). One site, 45SP91, in the Bowl and Pitcher area, is of special interest in that the site's assemblage and setting suggest mid-Holocene or greater antiquity (Larson 1985). The only large scale archaeological project on the Spokane River occurred in conjunction with the Centennial Trail Project (Shalk and Wyss 1989; Wyss 1989; Draper and Andrefsky 1991; Andrefsky and DePew 1992). The primary purpose of the project was locating sites along the right of way of trail construction, as well as identification of significant sites which might be ad- versely impacted by trail construction and/or use. A total of 72 sites were located or reexamined during this project, which was conducted from 1989-1992. ~ . 9 CHAPTER 3 ARCHAEOLOGICAL SUROEY INTRODOCTZON - This chapter of the report provides information concerning the archaeological survey conducted at Shelley Lake. The section includes a description of the methods employed during the survey, as well as a discussion of the results for each of the areas surveyed. METHODS AND RESIILT3 Initial review of the project area based on project maps and . field observation suggested that survey would be most efficiently conducted by dividing the larger project area into four subareas (areas A-D, Fig. 2) surrounding Shelley Lake (which made up approximately 16% of the total project area). Decisions concern- ing area boundaries were based on a combination of geomorphologi- cal features and Euroamerican features such as roads and fences. Area A consisted of the northern part of project area, extending approximately 40 m south past the access road to the Rice's Country Meats buildings (see photos, Figs. 3-6). The east and west boundaries of area A correlated with the project bound- aries. Area A included all of the buildings associated with Rice's Country Meats, and made up approximately 17% of the project area. Area A included an open field, a dilapidated slaughter house, three outbuildings, a parking lot, and an access road system. The open field was heavily plowed with little to no vegetational cover, and as such very high surface visibility. The area around the building was heavily disturbed and showed evi- dence of having been filled in prior to construction of the buildings. ' Coverage of Area A was conducted by the entire survey team (six people). A total of 24 north-south transects (four sweeps of six people) were walked across area A at approximately 10 m ~ intervals. A slightly zig-zag path was walked by each individual to maximize coverage. Fortyeight shovel probes were dug during the survey to insure that subsurface cultural materials were not ~ being missed. Shovel probes varied between 20 cm to 57 cm below surface. Fill from the shovel probes were carefully troweled through and placed back in the shovel probe hole. Deposits in the area were made up of a dark, organic rich, upper gravelly sandy ~ matrix averaging 25 cm to 30 cm in depth, followed by a lighter brown gravelly matrix. Differences in the two horizons appears to be primary in organic content, making the upper level much dark- ~ er. This upper level undoubtably correlates with a plowing zone. No evidence of cultural resources was located, other than a very discontinuous scattering of recent garbage. ~ ~ 10 ~ I I i i r „ ~ LJ • , ~ _ Q• ~ AREA, A XX - c- . . ~ ■ ~ ~ ■ ■ ■ ~ ~ , AREA C A R EA ~8 ` ~ I'. V ~ . PRCJECT - - ~ - ~ EDUNaARY _ ~ _ _ ~ . r a I ~ AREA D ~ 1 ~ 08 Figure Z Maq oz }he Sheiley Lake Proiect Area 5hawing $ounc~aries - ❑r survey ~:reas Mentianed in Text. ~ li ~ ~ _ ' "r. i:,~ ` ~"'Yji ~^`~~,II a,~'.~.=",; ` • . t _CliT'°_ _ =~'?C~~ ~';°Y".-= •:-~.3 '.:1z:: -I.1Cc S ...cU,^,,.°v .,,eats =lllial:?CtS Co -,7-ol1Lh::25t, . ...»*a T'' 'e" ~ :'_c;urQ LUlici_r.q :0 uz n l . - 'x.,%rar. , w.~~*a`•y ~ ~ `?aure _ ='hcLC cr RIce`s Councr•.• :.'.eats Euzldina • ~1~°.. _J =3sL" . ! Area B was lacated in the northwest section of the project area (see Phata, Fig. F), The northern bvundary of area 5 was marlked by Faurth Avenue, and caincided with the project bQUndary, ihe eastern bvundary ran directty south from the junGtion of Fourth Rvenue with Cnnklin Raad to the shore of Shelley Lake, following the shoreline sauthwest tv ttre most westerly extensian of the lake. The baundary of Area B then ru;ns immediately west and follaws the prcaject boundary along xts western edge no;rth ta Fourth AVenue. Area B incorporated approximately 26% of the project area. It cvnsisted of aheavily plrswed open field vn a terrace apprvximately 10 m abvve Shelley Lake and the sloping terrain running dawn tv the laice. Appraximately midway between tYne upper p1awed terrace and She11ey Lake a dirt access rvad on a remnant or ereated terrace occurs. The pYvwed upper terrace had 1itt1e ta no Vegetational caver and affvrded high surface visi- - bility. The sloping area had moderate plant grawth reducing visibility but nat t❑ an extent that surface coverage was pre- vented. A crew of three individuals surveyed area B. Transects were walked in an eastgwest direction with approximately 15 m inter- va 1s .Three sweeps were made with the three person team P result- ing in nine transects. A tvtal of 25 shovel probes were exGavat- ed, ranging in depth between 21 cm t❑ 33 cm below surface. Depas- its virtually identical to thmse in Area A were encountered rn Area B. one possi?ale basalt flake was reeavexed fram a shavel pxDbe in Area B, but the lack of other cultural matexiai suggests that this flake might have been ereated by plvwing actiVities. Area C included the lands bordering Shelley Lake ta the north, east, and southeast (Fig, 7), It included an intermittent stream and pond r bounded to the east by the proj ect boundaries, incorparating approximately 10% of the praject area. The veqeta- tien cvver variede but mostly crffered high surface visibility. The area consisted largely of a fairly steep slope running dawn to the shores of Shel, ley Lake. This area was also surv°eyed by athree person crew. The team surVeyea the area wxth ane swee~~ running west to east in the narthern section of the area, and nvrth to sa►xth in the eastern section of the area. Transect interVa1s varied fram 5 m to 15 m r3epending an the width of the survey area. Fourteen shovel probes we:re excawated in Area C, ranging in depth fram 15 cm t0 25 cm. one possirile end battered cobble was located south of Shelley Lake alcang the ~idge overlooking the ephemeral stream. ~ 14 ~ . ~ ~>::r~•~~:~,~y = ~ , ~ s~°-`g ~ 3-,~,~Y~ M,,„;: cigure 6 Photo overwiew of the Eastern Edge ❑f ~I 5u.rvey Area B(View ta North). :icure 7, Phmto ❑verxiew of SQUthern Part Qt Survev Area C anci ~astern Part oi SurveV Area (View t❑ Southeast). ' 15 i~ ~ I Area D cvnsisted of the remainder flf the praject area, incorporating the lands to the sauth vf Shelley Lake (Fig. 3--10). ~ Apprvximately 41% vf the tvtal praject area fell within the baundaries af area D. This area included an apen, piowed field with little to no vegetation cover. Surface visibility was very high throughaut area D. 5urvey coverage of this area was performed by the entire _ graup of six people. Twa roughly east-west sweeps were made with ' indiwidual surveyvrs spaced at appraximately 15-20 m intervals. _ An exaggerated zig-zag path was walked to maximize surface GaveX- age. A total of 30 shavel probes were excavated in this area, varying between 15 cm to 30 cm in depth. Na cultural materials were fvund during the surVey and testing of this area. I~ 16 , i - I a~~`~° ~ - Y °,~+~14' i , . . 4 i ' . a }~~~i .k ~ ~ "x ~ • d. ~ ~ . fY`N"rfY n T ~ ^ S LiLl e O ~hQ I w fl•. Cd i V•~ :J~ar. V uY .~ev ':L Ca fr zD -ScLfr-:l } 1 ~ ~ ~ S ~ I ~ I ! ~ ~ ~ CHAPTER 4 CONCLIISION The survey conducted at Shelley Lake by a crew from the Center for Northwest Anthropology at Washington State University , failed to recover evidence of cultural materials. A very inten- sive surface survey supplimented with subsurface shovel probes was performed without encountering evidence of culturalactivity other than that associated with the operation of the Rice's Country Meats facility. Most of the area consisted of heavily disturbed fields. Given the results of our survey efforts, the proposed project would not adversely effect cultural resources. As such, we recommend that the project be conducted. However, if cultural resources are encountered during the project activities, a quali- fied archaeologist should be contacted and consulted with before further operations. i 18 REFERENCES CITED ' Allison, I.S. 1968 Landforms. In Atlas of the Pacific Northwest: Resources and Development, 4th edition, edited by R.M. Highsmith, Jr. ,pp.25-30. oregon State University, Corvallis. Andrefsky, W., Jr. 1992 Cascade Phase Lithic Technology on the Lower Snake River. Paper presented at the 45th Annual Meeting of the Northwest Anthropological Association. Burnaby, B.C. Andrefsky, W., Jr. and A.D. DePew 1992 Cultural Resources Survey and Mapping at Two Localities Along the Middle Spokane River. Contributions in Cultural Resource Management No. 43. 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Andrefsky, Jr. pg. 7.1-7.49. Center for Northwest AnthropologyI Project Repnrt No. 17. Department ❑f Anthropvlogy, Washingtvn 5tate UniVexsity, Pu}.lman. ' Fa$ey, J. 1988 The Spokane River, its miies and its histary. Ms. ❑n -file, Spokane Centennial Trail Catnmittee, Spokane. ° ~ 20 , - Galm, J.R., G.D. Hartman, R.A. Matsen, and G.O. Stephenson 1981 A Cultural Resources Overview of Bonneville Power Administration's Mid-Columbia Project, Central Washinqton. Eastern Washington University Reports in Archaeology and History 100-16, Archaeological and Historical Services, Cheney. Larson, L.L. 1985 Archaeological Assessments State Parks Capital Projects, 1984-85. Reconnaissance Report No. 46, Office of Public Archaeology, Institute for Environmental Studies, University of Washington, Seattle. 1987 Archaeological Assessments State Parks Capital Projects, 1985-1987. Reconnaissance Report No. 48, Office of Public Archaeology, Institute for Environmental Studies, University of Washington, Seattle. 1991 Spokane River Centennial Trail Upstream and Downstream Historic Overview. In, Archaeology of the Middle Spokane River VaZZey: Investigations A1ong the Spokane Centennial Trail. Edited by J.A. Draper and W. Andrefsky, Jr., pp.6.1-6.32. Center for Northwest Anthropology Project Report No.I7.Department of Anthropology, Washington State Universi ty, Pullman. Leonhardy, F. and D.C. Rice 1970 A Proposed Cultural Typology for the Snake River Region of Southeastern Washington. Northwest Anthropological Research Notes 4:1-19. 1980 The Lower Snake River Culture Typology: A Revision and Evaluation. Paper presented at the 33rd Annual Northwest Anthropological Conference, Bellingham, Washington. Lindeman, G.W. 1979 Cultural Resources Survey of Government Way/Lindeke Street Corridor From Greenwood Road to Sixteenth Avenue, Spokane. Washington Archaeological Research Center, Washing - ton State University, Pullman. Lindeman, G.W. and H.S. Rice 1981 Cultural Resources Survey of the Upriver Dam Hydroelec tric Project in Spokane, Washington. National Heritage, Inc., Colfax, Washington. Mack, R.N., N.W. Rutter, S. Valastro, and V.M. Bryant, Jr. 1978 Late Quaternary Vegetation History of Waitts Lake, Col ville River Valley, Washington. Botanical Gazette 139(4):499-506. 21 Mehringer, P.J., Jr. 1985 Late-Quaternary Pollen Records from the Interior Pacific ~ Northwest and Northern Great Basin of the United States. In Pollen Records of Late-Quaternary North American Sediments, edited by V.A. Bryant and R.G. Holloway, pp. 167-189. Ameri - can Association of Stratigraphic Palynologists Foundation, Dallas, Texas. Nelson, C.M. 1969 The Sunset Creek Site (45RT28) and Its P1ace in Plateau Prehistory. Laboratory of Anthropology and History Report of Investigation No. 17, Washington State University, Pullman. Odum, E.P. 1971 Fundamentals of EcoZogy, 3rd edition. W.B. Saunders, Philadelphia. O'Neal, J. - 1973 Archaeological and Paleontological Site Survey form for 45SP6. Laboratory of Anthropology, Washington State Universi ty. Site form on file at the Washington State Office of Archaeology and History, Olympia. Peltier, J. , 1983 Antoine Plante, mountain man, rancher, miner, guide, - hostler, and ferryman. Ye Galleon Press, Fairfield, Washing • ton. ~ Rice, H.S. 1978 Archaeological Survey of Northriver Drive Corridor. Vols. I and II. National Heritage, Inc., Colfax, Washington. - 1984 A Survey for Cultural Resources at SR 90, Sullivan Road Interchange, Spokane County, Washington (TAD 284). National Heritage, Inc., Colfax, Washington. Salo, L.V. 1986 Washington Army National Guard, Camp Seven Mi1e, Range Construction and Improvements, Cultural Resource - Reconnaissance. U.S. Army Corps of Engineers, Seattle Dis trict, Seattle Washington. Sappington, R.L. and C.D Carley 1984 Archaeological Test Excavation and Evaluation of Three Prehistoric Sites at Swift Bar on the Lower Snake River, Southeastern Washingtor}. Anthropological Research Manuscript Series No. 81, Universi'ty of Idaho, Moscow. Shalk, R.F. and M.J. Wyss 1989 A Cultural Resource Survey of the Spokane River Centenni _ a1 Trai1: Phase I--Spokane to the Washington/Idaho Border. Contributions in Cultural Resource Management No. 27, Center for Northwest Anthropology, Washington State University. ! 22 - -Swanson, E.H., Jr. 1962 Early Culture af Northwestern North Ameraca. American Antiquity 28 ;151-158 . `PhomS, A.V. - 1991 Landsaape Evolutian and Ecanomic Resource Structure ❑f the Middle 5pakane River Valley. In, A.rlchaealogy of the I►fiddle Spokane R3ver Valley: Investiga'tivns AIQng the Spakane Gentennial Trail. Edited hy J.A. Draper and W. Andrefsky, Jr. pp. 3.1-3,29. Center for Northwest Anthrapology Project Repart Nv. 17. Department of Anthrapology, Washinqton 5tate Uniwersity, Pullman. WarretY, C. N. 1968 The View frvm Wenas: A 5tudy of Plateau Prehistvey. c]ccasional Papers af the Idaho State University Museum, Nv. 24, Idaha State University, Pocatello. ~ Wyss. M.J. ' 1984 Cultural Ftesources Survey of the Pxoposed Latah creek Golf Caurss-Phase I. Report submitted ta David Evans and Associates, Inc., Spakane, Washingtvn. 23 ~ APPENDIB A . - RESULTS OF BHOVEL PROBES I A.1 i - i - ~ - Discussioa of Shovel Probe oata Included belaw is a Iisting of the shovel probes excavated - during the Shelley Lake archaeolagical survey. F.iue categories are designated in Ghe listing. Included are Unit, Level (abbrevi- ated LV), depth of excavation of the shovel prvbe below surface (HS), Matrix, and the presence or absenee of Cultural Material (cult. Material). . 2he Unit designation is a field identification number used hy the Center for Northwest Anthrapalogy durinq archaeological surveys. The twa letters which start the unit desigraatian are the initials of the inciividual who dug the probe, and the nuanber which follaws is assi.yned in sequential order. The gurpase af this designatian is to cross-rreference field notes taken 4n each shovel probe hy the individual to a field map ❑n which location vf the shovel probes are plotted. The Level designativn is typically used in areas where multiple natural and/ar cultural strata are dug thraugh durinq excavation af the shovel prabe. A number, starting with 1 at the surface, is assigned ito each recognized +different strata. This aliows far increased contral whern cultural materials are encoun- tered. The B5 designation prvVides the depth belcrw surface in centimeters of the battom af ttte Leuel of the Unit being cvnsid- ered. The Matrix designativn is a field descriptian of the depas- its cantained within eaeh 1evel. For the She7ley Lake Prvject, aniy twa strata were recognized. The upper most depasits were dark, organic r'zch, grar►elly materials. In svme shovel prahes, a lower, lighter gravelly material was encauntered. This lower level differed fram the upper leve1 primarily in that the upper layer contained more ❑rganic material, making it darker in ap- pearance. The Cultural Material categary signifies the presence or absence af cultural artifacts. Durinq ttze she],ley Lake Survey no significant cultural resaurces were lacated. A-2 ~ UNIT La lBS MATAIX - CIILT. HATE3Z3AL ~ KC 1 1 2 0 cm ~ARK BRCiWN GRp,VELLY SOIL NONE - KC2 T 30 DARK BRN W fLT BRN LOWEFt LA9CER NONE ' ICC3 1 25 DARK BRN '[hT/LT BRN LUt~~R LAYER NONE ~ KC4 1 40 QARK BRN W/LT 8RN LQWER LAYER NONE KC5 1 25 BROWN GRAVELLY SQIL NONE ,I{C6 1 25 DARI~ BRQWN GRAVELLY SOIL NONE KC7 1 30 DRK BRN W/'LT 8RN GRAVELLY SOII, NONE ~ KC8 1 35 ORIC HRN W/I,T BRNGRAVELLY SQIL NONE KC9 1 25 SANDY 5[]IL W]SMALI, PEEBLES NONE KC10 1 30 SANL3Y Sc?TL WfSMAI,L PEBBLES NONE ~ KC11 1 15 DRK BRN SOIL Wl SHT5T05E MATL NONE KC12 1 15 DRK BR0WN SDIL WITH ROCKS NONE - I{C 13 1 25 DRK BROWN Sf]IL WITH ROCKS NONE KC14 1 20 DRK SROWN SOIL WITH ROCKS NONE ~ KC15 1 25 DFdK BROWN S{32L WITH R9CKS NONE ~ KG16 1 25 HRX f3R4WN SQIL WITI3 ROCKS NONE KC17 I 25 'l7RI{ SRLWN SOIL WITH R+aCKS NONE ~ KC18 1 25 I]RK BRC7WN SOIL WI'TH RflCRS NONE KG19 1 25 DRK BROWN S4IL WI'I'H ROCKS NONE - AD1 1 20 dRYC GRAGEL,LY SANDY TILL NONE ~ AD2 1 25 aRK GRAVELLY SAAfiDY MA,Z`FtIX NONE AI32 2 34 LT BRN GRAVELLY MATRIX NONE A03 1 25 DRK GRP,VELLY SANQY MA,TRIX NONE AT?3 2 30 LT 8RN GRAVELLY MA°I'RIX NONE ~ Ap4 1 25 DRK GFE.AVELI,Y SANDY MATFtIX NONE Ap4 2 33 LT SRN GR,AVELLY MATRIX NONE AI75 L 25 DPrRK GfiAVELLY MATRIX NONE ~ AIJ6 1 20 DARK GRAVELLY NIATRIX NONE P,D7 1 35 UARK GRAVELLY MATRIX 1+TQNE AD8 1 25 DAR{ GRAVELI,Y MATRI% NONE AD8 2 42 LT BRN GRAVELLY MAT~IX NONE ~ Ad9 T 33 Y3ARFC GRAVELLY MATRIX NONE AD1(} 1 27 E]ARK GRAVELLY MATRIX NONE AD11 1 31 L}AR{ CRAVELLY MATRTX NONE ~ AD12 1 26 dARK GR.AVELLY 3s'IATkIX NONE AD13 1 31 DP►FtK GRAVELL'~ MATRIX NONE AD14 1 23 I7ARH GRAVELLY A'IAT'RIX NONE AD15 1 22 L]ARK GRAVELLY MP;TRIX NONE 1 AD 1 G 1 27 DARK GRAVELLY MATRIK NONE AD17 1 26 DARK GRAVELLY MAThTX t+1OiJE AD18 1 22 DARK GRPdVELLY MATRIX NONE ~ AD19 1 19 I]ARK GRARTEI,LY MATFtIX NONE AD2 i3 1 23 f3ARK GRAVE'LLY MATRIX NONE JG1 1 35 DAR'K SROWid NONE - JG2 1 45 DpRK $RN-L"F BRN P,T 30cm NONE - ~ JG3 1 32 QA,RK BR(3WM NONE JG4 1 57 QARK HRQWN-Y.,IGHT BROWPT NONE .TG5 1 28 DARK BROWN NONE ~ .TG 6 1 35 DARK BRi74+1N NONE ~ A.3 c ~ ~ UNFT LV BS MATR2B CUrI,T. MA'd'ERIAL JG7 1 32 DAZK BROWN NaNE ` JG8 1 32 L7ARK BFt9WNcLT BROWN AT 20em NONE ' JG9 1 28 DARt{ BRflWN NONE JG 1 D 1 25 T]ARK BROWN NOHE o JG 11 1 32 DARK BROWN • PQ SS I BLE BASALT • FLAKE JG12 1 25 I3ARK BRQWN NONE ' JG13 1 27 QARK BROWN NpNE t JG14 1 30 DARK BROWN _ NC?NE JG15 1 21 DARK BROWN NDNE , JG16 3 27 DARIK BROWN N[3NE , ~,TG17 1 25 DAFtIC BROWN NDN;E JG18 1 30 QARK BROWN NONE .TG19 I 20 I3AR.K BROWN NONE JG20 1 20 DARK BROWN NOI+FE , I]H1 1 25 BROWN GRAVELLY $ANp NvNE I]H 1 1 25 BROWN GFZAVELLY 5AN17 NQNE DH3 1 20 BRC]W]+I G~.AVELLY SANL} 1VONE ' DH4 1 20 BROWN GRAVELLY SANI] NONE DHS 1 20 BROWN GRAVELLY SANO NdNE DH6 1 30 BROWN GFdAVELLY SANt] NONE DH7 1 20 BROWN GRAriTELLY SA+iD NpNE aH8 1 35 BROWN SAwNaY iAAM IdONE L3M9 Z 20 BROWN GRAVET,LY SMD NONE ' DH10 1 30 BROWN SANDY LC3AM NOAFE DHii 1 15 BROWN RC)CKY SA,.ND NpNE DH12 1 35 BROWN SAiIND W/PEBBLES NONE DH13 1 30 BROWN x,a~AMY SAN❑ PUSSIBLE FCR DH14 1 10 BROWN G~AVEI,LY 5AND IdO1VE DY-fi15 1 20 EiRl7WTi' GRAVELLY SANQ NOPFE DH16 1 25 BROWN GRP,VELLY SANb NQAIE mH17 1 20 BROWN GRAVELLY SAND NdNE - DH18 1 15 BROWN GfiAVELLY SAND AinldE DH19 1 15 BROWN GRAVELLY SAND NONE J,NI1 1 2 6 DARK BROWN NO1dE JM2 1 30 L7ARK BROWN N[]NE JM2 2 36 LIGHT BROWN NOI+IE JM3 1 25 DARK $R(],~N NDNE .31M3 2 2$ LIGHT BROWN NONE , JM4 1 25 l7ARK BRa" 1doNE JNI5 1 25 DARK BROWN N❑NE JM5 2 30 LIGHT BFtOGti7'N N£]NE JM5 1 34 DAF3K BROWN NONE - - JrM7 1 30 DARK ERC)Wd! NflNE ims 1- 40 OARK BROWN NQN E JM9 1 20 QARK BROWN NflN E .7m1 D 1 35 OP►FtK BROWN N9N E JM11 1 25 ~ARK BROWN Ia"ON E ,n~ ~ ~ ~ 25 DARc BRO fa rroNE x ~ A.4 • e ~ i . ~ ~ IINIT LV BS MATRI% C'QLT. MATERIAL _ JM12 2 30 LIGHT BROWN NONE JM13 1 30 DI3RI{ BRaWN NONE JM14 1 25 DARK BRaWN NONE JMi 5 1 15 DARK BRvwN NONE JMi 6 1 25 DARc sROwrr NONE 3M17 1 20 DARK $ROWN NONE SM18 1 20 DARK BRQWN AAQAIE ' JM19 1 25 DARK BROWN NONE LM1 1 23 VERY DARK ANO WET SQrL NONE LN2 1 30 VERY DARK AN~ ~ET SOIL NONE LM3 1 20 aAFtK THEN LTGHTER AT 15cm NONE ' LM4 1 32 DARK NONE ' LM5 1 28 DAFZK 5O1L; VERY GRAVELLY NONE LM6 1 30 DARK S[3IL; VEFtY GRAVELLY NONE LM7 1 29 DARK SOIL; VEFtY GFLAVELLY NONE ; L148 1 30 DARK SOIL; VERY GRAVELIaY NONE - LM9 1 28 ❑ARK SOIL; VERY GRP,VELLY NONE „ LMla 1 23 ❑ARR SOIL; VERY GRAVELLY NONE ; LM11 1 25 DARIC SDIL; VERx GRAVELLY NONE LM12 1 26 DARK 5C3IL, VERY GRAVEI.,LY NONE , LM13 1 24 I3ARI{ S+CaIL; VERY GRAVELLY NONE LM14 1 23 DARK SOaY.,; VERY GFtAVEL1,Y NONE LM15 1 29 DP,RK SOIL; VERY GRAVELLY NONE LM 16 1 26 DAR]fi 5D YL; VER~ GRA'VELLY NON E i LM17 1 29 I]ARK SQIL; VERY GRAVELLY NONE I,M18 3 27 DARK 8OIL; VERY GRAVELLY NONE LM19 l 28 DARK SOIL; VERY GRAVELLY NONE LM2 0 1 25 DARK S❑I L; VERY GRAVELLY NONE , A. 5 Appenalix !7 Traffic lmpact r4nalysis T1AFFIC 1MP ACT Al r 11LYS1S - for the PROPOSED SHELLEY LAKE RESIDENTIAL DEVELOPMENT 5EP'I`EMBER 1993 Prepared By: InFartd PQCi, f~c Engineering +Compcrny 25 S. Altamont Spokaate, '`YYA 99202 (509)535-141 0 , a - - TRAFFIC IMIPACT .A.NAL YSIS ' for the ~ Proposed Shel1ey Lake - ' Residential I3evelopment Spvkane Cvunty, Washungtvn september 1993 , p~epared by: Inlanct Yacific Engirr.eering Campany 25 S. Altwnont Spakcrne, WA 99202 (509)535-1 410 This repont has been grepare+d by the staff vf In1and PacYfic Engineering Company under the directian of the uncfersigned prvfessional engineer whvse seal and signature appear herean. W l~ ti~~~,o~ ~ ~ - 5462~ ~ ~ FXPfRES 9/24/lz~ ~'i fdd R. W11pp1E:, P.E. - TABI.E OF CONTEN~'~S' rxTRoDUC77aN I - ' rrA - Do~~~ENr ScvFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I AL.TERNA77VL l - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I ~ ALTLRNA77vE 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - ~ ALTZP11{'ATIYE 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 PROJEGT DESC121PT'1[)NS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . b ~ Aiternative l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - Adtemative 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Alt,erirative 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 -eUT ivE sUmmARY s , cOrveLUSIaNs - A~emative rvo. r . . . . . . . . . . . . . . . . . . . . . . . . . . . . s RECOMMETV'UATTONS q Alrernarive No. 1 . . . . . . . . . . . . . . . . . . . . . . . . 9 CUNCL USIUNS - Airernati ve Na. Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . g RLCQMMENDATIaNS - Alternative No. 2 . . . . . . . . . . . . . . . . . . . . . . . 11 CONGLU.SIQNS - Alrernative NQ. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - RLCOMMEIVDATIONS - AItemwrfve No. 3 . . . . . . . . . . . . . . . . . . . . . . . 11 MSTING CON17I77(7NS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 EXISTTNG C+nADITIUNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 ~',and ilse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Eristing kaudways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Suldivan Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Sprugue Averaue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4rh Avenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Canklirt Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 . . Rotchford Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ~ STUDY INTERSEC1IONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Traffic YQlumes arrd Peak Hours of Operatian . . . . . . . . . . . . . . . . . 15 LEVEL []F SERwlCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1$ SigriaTized Ittersectton,s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I$ Un,rigrurlized Intersection.r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1$ - Shelley Lake Level of Se►vice arul TNffic Analysis . . . . . . . . . . . . . . 19 Sullrvart Road arul4th Avenue . . . . . . . . . . . . . . . . . . . . . . 20 Sprugue Avenue and Cnnklin Road . . . . . . . . . . . . . . . . . . . 20 Suilivcrn Road ancl 16th Avenue . . . . . . . . . . . . . . . . . . . . . 21 Warraur1 AttaIysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 ?raffic Safery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 ~ Ptanned Transporratran Irnpravements . . . . . . . . . . . . . . . . . . . . . . 24 ; Fi77`URE YF.AR 77ZAFFIC IMPACI' ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . 25 f1NALYSIS ASST]MI°774NS AND METHODDLQGIES . . . . . . . . . . . . . . . . . 25 i i DEVELOPMEN'I' TRAF'FlC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 ShelFey Lake - Arlerradi've Na. I 5ite Generated 7raffic . . . . . , , . . . . 26 ShelFey Lake - Aiternatiive Nv. Z Sate Cenerared Traffic . . . . . . . . . . . 26 Shelley Lake - Alternati{ve Na. 3 Sire Gerierated Traffic . . . . . . . . . . . 27 TRIP DISTRIB U77f31V AND ASSIGNMENI' . . . . . . . . . . . . . . . . . . . . . . . 29 &4CKGRUUND TRAFFIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 FUTURE YFAR T LLEL QF SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Background Furure Yerar Leved vf Service . . . . . . . . . . . . . . . . . . . . 36 Sul2iva.rt Roud and Sprague Aveture . . . . . . . . . . . . . . . . . . . 36 1995 Bctckgrotutd - AM Peak Hour . . . . . . . . . . . . . . . 36 - 1995 Background - PM Peak Hour . . . . . . . . . . . . . . . 36 2000 Background - AM Peak Hour . . . . . . . . . . . . . . . 36 2000 Background - PM Peak Hour . . . . . . . . . . . . . . . 36 SulTivun Rorid ctnd 4th Avenue - . . . . . . . . . . . . . . . . . . . . . 37 1995 Background - AM Peak Haur . . . . . . . . . . . . . . . 37 ~ - 1995 Backgraund - PM Peak Hour . . . . . . . . . . . . . . . 37 ~ - 2000 Ba.ckgmund - AM Peak HQUr . , . . . . . . . . . . . . . 37 2003 Backgraurul - PM Peak Hour . . . . . . . . . . . . . . . 37 Spragate Avenue tutd Gankdin Road - . . . . . . . . . . . . . . . . . . 37 _ 1995 Backgraund - AM Peak Hour . . . . . . . . . . . . . . . 37 1995 Background - FAv1 Peak Hour . . . . . . . . . . . . . . . 37 2000 .Backgraund - AM Peak Hour . . . . . . . . . . . . . . . 38 ' 2(1f~0 Background - PM Peak Hour . . . . . . . . . . . . . . . 38 ' I Sullivan I2oad ivid 16th Avenue . . . . . . . . . . . . . . . . . . . . . 38 1995 Bc3ckground - AM Peak Hour . . . . . . . . . . . . . . . 38 ~ 1995 Bokgmund - PM Peak Hour . . . . . . . . . . . . . . . 38 2000 Eat'kgraund - AM Peak Hour . . . . . . . . . . . . . . . 38 ~ 2000 Backgrouird - PM Peak Hour . . . . . . . . . . . . . . . 38 ~ Shelley Lake Future Year Level of Senrice Altemative Na. I . . . . . . . 43 ~ Alternative No. I P1wse I - Resulring I.evel of Sen+ice . . . , . . . 43 ° AM Peak Hvur . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 - PM P'eaXr, Hvur . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 AlternAtive Na. I Phace 2 - Resulting Leve2 0f Service . . . . . . . 43 ~ AM Peak Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 ' - PM PeQk Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 _ Steelley Lake Future Year LeveI of Servrce Alrernative Nv. Z. 52 ~ Aiternative No. 2 Phase 1 - ResuTting Level of Service . . . . . . . 52 AM Peak Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 _ PM PeakI.Haur . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 ~ Aiierrwfive No. ~ Pitase 2 - ResuTting Level af Ser►fice . . . . , . . 52 I ~ " Fe~ulr Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 - PM Peak Haur . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 ~ ~ u ~ , SHEUEYLrTKE FUTURE DEVEL4PMEN!'' IMI°ACT;S . . . . . . . . . . . . . . . . 59 AI.TERNA77YE NO. I Phare 1 - 1995 . . . . . . . . . . . . . . . . . . . . . . 59 ALTERNATIVE NO. I Phase 2 - 2000 . . . . . . . . . . . . . . . . . . . . . . 59 , AM PeGrk Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 PM Peak Haaer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 ALTERNATlVE 1V0. 2 Phase I - 1995 . . . . . . . . . . . . . . . . . . . . . . Sl'] ~ AL7'ER1VATI"kE Nf?. 2 Phase 2 - 2000 . . . . . . . . . . . . . . . . . . . . . . 60 ALTERNATIvE N(1. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ' PDTEN77AL IIIITIGATIDN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 ALTERNATIVE NO. 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Sullivan Road and Sprague .ivenue . . . . . . . . . . . . . . . . . 61 SuIlivan Roud and 4th Avenue . . . . . . . . . . . . . . . . . . . . . . 61 _ Sprague Avenue and Cortk2in Road . . . . . . . . . . . . . . . . . . . 61 Sullivan Road ared 16th Avenue . . . . . . . . . . . . . . . . . . . . . 62 - ALTERNAT7VE N!]. 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Sullivan Roud und 5prag,ue Avenue . . . . . . . . . . . . . . . . . . . 62 Sullivan IRaad aitd 4th Avenue . . . . . . . . . . . . . . . . . . . . . . 62 Spragcte Avenue and Conklin Road . . . . . . . . . . . . . . . . . . . 53 Sullivan Road arrd 1 Sth Avenue . . . . . . . . . . . . . . . . . . . 63 t1LTERI4'A27VE 1VO. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 CONCLTJST(JNS AND RECOMME1VI?A774NS . . . . . . . . . . . . . . . . . . . . . . . . . , 64 CONCLUSICINS - Alternative Na. I . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 RECOMMEtI'DATIONS - .4ltemative No. 1 . . . . . . . . . . . . . . . . . . . . . . . 65 C(]WCI.USIaNS - Altemwtive No. 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . bS RECaMME11DA77ONS - APter,native Nv. 2 . . . . . . . . . . . . . . . . . . . . . . . 67 CONCLUSI4NS - Alternarive No. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 RECqMMEIVVDAT7(3N5 - Alrernatave No, 3 . . . . . . . . . . . . . . . . . . . . . . . 67 , iii i LIST C)F TABLES ~ Table I - Proposed Project Phasing : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I Table 2 - Propvsed Praject Phasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 3 - Existing and Futture Zoning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 4 - 1993 Pevk Hour Existing I.evels af Service . . . . . . . . . . . . . . . . . . . . . . 20 Table 4B - EXlstd7~g ACCide1J1 HZs1B1"y 190 lA '92 . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 5 F TWp Generation - Shelley I.~7re PIat . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Table 6 - Pturse 1 - AM Peak Hour Inrersection Levels of Service - ATtemative 1 . . . . 44 • Table 7-, Pha:re 1- FM Perck Hour I►rtersectian Levelr vf Service - Alternative I 44 Table 8 - Fha~.ce 2- AM Pecric Hour Ikersection I.evels of Servace - Afterjw.tive l.... 45 Table 9- Phnre 2 - FM Peak Hour Nersection Levels af SerWce - AJtemative l.... 45 Table IQ -Phase I- AM Peuk Hpur Intersection Levelr of Service - Airemative 2... 53 Table 11 -Phase I - PM Peak Haur lrrtersectian Levels of Service - ATrer,arive 2 53 Table 12 - Plase 2- AM Pecrk Hour lnrersectian I.eve7s af Service - Alternative 2... 54 Table 13 - Pha.se 2 - PM Peazk Hour I►tersection Levels nf Service - Alrernative 2... 54 ; % i►+ ; ' . ~ I I~ r - I LIST OF FIGURES ~ ~ Figure 1 - Ycirtity Map . . . . . . . . . . . . . . . 2 . Figure 2- Alternative No. 1- Site Plan . . . . . . . . . . . . . . . . . . . . . . . . . 3 F7igure 3 - Alternative No. 2 - Site Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1 Figure 4 - Existing AM Peak Hour Volumes . . . . . . . . . . . 16 Figure S - Ezisting PM Peak Hour Volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 6 - 7Yip Distribution By Percent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ' Figure 7- Alternative No. 1- Phase 1, Trip Distribution and Assignment 32 FYgure 8- Alternative No. 1- Phase 2, Trip Distribution and Assignmera 33 Fligure 9- Alternative No. 2- Phase 1, Trip Distribution and Assignment 34 , Rgure 10 - Alternative No. 2- Phose 2, 7Yip Distribution and Assignment 35 F7gure 11 - 1995 AM Peak Hour Background 7Ya,,~`'ic Volumes . . . . . . . . . . . . . . . . 39 Figure 12 - 1995 PM Peak Hour Background Tra,,~`'ic Volumes . . . . . . . . . . . . . . . . 40 ' Figure 13 - 2000 AM Peak Hour Background Tra,,~`'ic Volumes . . . . . . . . . . . . . . . . 41 Figure 14 - 2000 PM Peak Hour Background Tra„~`'ic Volumes . . . . . . . . . . . . . . . . 42 Rgure 15 - 1995 AM Peak Hour Alternative No. 1 Traffic Volumes . . . . . . . . . . . . . 48 ~ Figure 16 - 1995 PM Peak Hour Alternative No. 1 Traffic Volwnes . . . . . . . . . . . . . 49 Figure 17 - 2000 AM Peak Hour Alternative No. 1 Tra,,~`'ic Volumes . . . . . . . . . . . . . SO Figure 18 - 2000 AM Peak Hour Alternative No. 1 Tra,,~''ic Volumes . . . . . . . . . . . . . Sl , Figure 19 - 1995 AM Peak Hour Alternative No. 2 Tra,,Q`'ic Volumes . . . . . . . . . . . . . SS Figure 20 - 1995 PM Peak Hour Alternative No. 2 Tra„~`'ic Volumes . . . . . . . . . . . . . 56 Figure 21 - 2000 AM Peak Hour Alternative No. 2 Traffic Volumes . . . . . . . . . . . . . 57 ' Figure 22 - 2000 AM Peak Hour Alternative No. 2 Tra,,~''ic Volumes . . . . . . . . . . . . . 58 , ' ' ~ ' ' v , 1 . INTRC1I3UCT'IUN ` TIA - DQCUMEIVT SCnPE "Y"his Traffc xmpact Analysis MA) is being p,roVided ta Spalane County as an appendix far the 5helley Lake, Envirvnmental Impack Statement, tu document the analysis artd findings of atraffic impact assessment canducted fvr the proposed Shelley Lake Preliminary Plat located east of the City of Spvlcane in the Spakane Va11ey portion of the Caunky. See Figure 1. Fvr tlais anaYysis there are three groposed altematives as ffallaw: AL7ERNATIVE 1- Is theAs Proposed Al1ernQtive, wtuch describes the project as presentec3 to _ the public in the scaping hearing and as shown in Figare 2. For this altemative the prvpvsed prvject would develop apprvximately 123.8 acres of primarily apen and rvlling pasture Iand. This alternative rrvould be expected tv result in the creaticrn of approximately 460 lvts and units analyzed in twa completion phases. At this time Table 1 provides ihe iatlunit ghasing and years of development, Tab1e No. 1- Proposed Yroject Phasing x ~ F LA E r~i "~•r ~t\ ' } ``•`l Sc~a.•.. + t. ` C'r . F ~ } .,~.7LY.CLL fY a llLT~T~1T[Y~LA .3+;~7E ` ` ' ' r . k . , ,t.. , , <,,,'c . ;)~"c . 'S ' , , • ; ~~;+/.r+; Y .i2.~.' , ; ',F7 3, ; t'`~3'`' • ~v<:. ~,Pl1~a;'',.y~sl~•.',' ~7eVC10pu1@tlE•YP.et~°, • NQ.~O~~.+~fs ~ YIr1i~'s,~i. . 1 ~ 1993-1995 ~ 58 ~ 58 sf 2 ~ 1995-2000 ~ 402 I 206 sf1196 mf Totat ~ 460 ~ 264 sffl196 mf sf = 5ingia Family Residential Detached mf = Mu1ti-Family Fteaidential (Apartment) .4L3ER1VA77YE 2- Is the DeveToped U►tder F-xisting 2,oning Adterjuitive, vahich describes develvFment of the prvject vnly to the level of the existing underlying zaning, as shawn in Figure 3. For this aliematiue the proposed project would deveLop apprvximately 123.8 acres of primarily vpen and rolling pasture 1and. This altemative would be expected tv result in the creatian of approxirnately 225 lots analyzed in twa cvmpletivn phases. At this time °x'able 2 provides the lvt phasing and years of dewelapment. Tnland Fae%~ic Engirree►ing Compqjry ~ 5hellry Lake TTA ~ . _ • . la Y - r a - ~ ~ - • ~ ~ iS • • _ . ~ - ~ ~ P 4?6 1^~( w/ 1 ~ a : • r p O t 14 6.• Progren ~ 9 . 6' . . . ~ • 5ch ~ f03 ~ • a m ~ j c a a429 7' . ~~:~~~t'a: ■ . . ~ ~ _ . ~ . . ~ . . . . •w.av ` 1 3 y ..v.aLtEY • + • . ~ ~ .q ~ . ~ ~ e ~ . . •e' •m ~ oe e a ~ y . ar Hi~h 9 ~ • • ' • • ~ = ~ '~h~' • - ' n T . z. i . ~ 1I'er3dU.le . _ I • ~':~r • ~ ' . . . . i 1 4 ;A►vE.•~. a. ' 'Lt~..' ° . ~ B' ' • ° ~ ° ' M,L4VArCEE ' ST PAL1L . -4, k&s3CIF1C ' in V~ eo L . ' ' e e 4T~v a•~_ . • AvE~ I Tre Ief . •.1'~ v , . .y . . r • 20/C Park q a o J~~; ~ ~ a ~ p • ~ • ` ~S~,~l~..e - s • ~ _ • ~ q 1 . - r~ . • : • r Adam ~ 2020 . . cs`h : - Mr. i Gentra)"Va3Eea• High Sch 5ev'ra . : . ~2S . _ + o • 1 , _ ~ ~ - ~r~.-, ~ :'f.... ,I. • ~P w'~.' - _ ~ x cp ~ W r 6• Ii~Ya~es~•l ~ + F • ' A vE 'n k 1 r f tiw ~ - z ' :~Ji` - • ~ i ' ~ ~ ~ ~ =a~a :~~~s~ssm~ e~' '4 _ ~ ' ~ P _ • • ~ ~ ~a34 a L~} ~ ~ _ v a ' fi~ p d ! . 7 " , ~a r.~ d7 ° • . ° 8 ~1 ~ A - • ~ ,E ~ - - - _ . i ' V C-N _Y MAP NOT TO SCALE ~ . . . / ~ ~NLAND PACiFIC Figure SHELLEY LACE ' ENL,~~~EERING Si te P1 an : SPOKA1dE, WASFlINGTC3N 5outh 25 Altomont $pakvne.Wcrshington (509) 535-141 v 99202 J` J~ T'RAFF1C 1MPACT ANALYS!S Table AIn. 2 - Propcued P'rvjeet Phasing , • AL~iA'~V~cZ -;~~'R~~EC~;~D~EI~APMENT PHA5~~$` • ~ ; ; `';~°},~~s' ' • ' se • 'A;~Welop~eat`-T'esi< < <~;~~M[r.a~ Ln#s r I A `U~ita ;~~`v. L ~ 1993-1495 ~ 58 ~ 58sf 2 p 1335-2000 ~ 169 ~ 169 sf Tota11 ~ 225 ~ 225 sf , sf = Single Fainily Residential Detached A,LT'ERI4'ATlVE 3- is the No Activn ATternative, vvhich describes ner development accurring vn the approximateTy 123.$ acres vf prinnariiy vpen and rvlling pasture land. FQr this alternative the only change in land use wauld occur if farming vr similar uses were stopped. This site fvr the praposed development as shown in Fsgure i is lacated svuth of the intersectivn af 4th AVenue and Conklin Road, apprQacimately one-ha.If pnile sauth af Sprague Avenue and one-half mile east of Su1liVan Raad. The purpose of the traf~ic analysis fvr this grapased development is ta review+, assess and identify pvtentiaF traffic related impacts ta the lacal transportativm system, far Altemative 1 and A1ternatiVe 2, and wlaere pvssible minimize these isnpacts. This 'I'TA will be cvmpleted in accordance with khe current traffic guidelines available from 5pvk.ar►e Caunty and the Institute of Traffic Engineers (A Recommended Fractice -Tra~'rc Aceess ar2d Impact Studies fvr Site Dever~pme,u,r991). Specific traffc impact related issues to be addressed within this report will include: • Existing and Future trafFc candific,ns within the project study area. ■ °Pipeiine" area derrelopments with respect to the existing and future traffic cvnditivns as they relate to proposed Sullivan Road imprvvements as well as vther propvsed deVeloprnents such as Fred Meyer, Target, R.idgemont, Marraing Side, . Autumn Crest, etc. • Trig generatian characteristics of the propvsed development alt.ematives far the existing and praposed transgortativn systern. _ • The anticipated trip distribution expected fvr khe neva trips tolfrorn the site, for Phase 1 and at Phase 2 ultimate buildout, in year 240(}. Inland Fac~fic Eng►►►ucring l:ampany 5 sherrey r.ake M d ' ~ • The affect of" the trip generativn and distribution to the existing and prvpvsed transpvrtativrt system by the proposed project deveYopment alternative phases. • Analysis and recommended rnitigation far the affects of the generated trips by each aitemative on the existing and future trarispnrtatian system hy phase. PROJECT DE,SCRIPT'IQNS Alternahve 1 - 'I'his alternative consists vf 265 lots being deWelvped aVer the next ser+en to 15 years iniv 264 ! single farn.ily detached residences and 136 multi-family (apartmentJtownhome) residences. This plat wauld be constructed within that area knawn as the Spokane Valley within Spokane Caunty, approximately 1(] miles east of the Cxty of Sgvkane Certttral Eusiness District (CBD). The site is approxirnatePy one-half mile south and east vf Sprague Avenue and Sullivan Raad, respectively. At ihis time the site is rrot bounded by any rcaads for any appreciable distance. To the south there are three street tearmini at the plat bvundary, Rotchford Drive, Galway Street and Shamrack Street. It is anticipated that the only connection to eithet of these streets will be via Rotchfvrd Drive, which will be extended through the pIat to tie directly into Conkiin Rvad. - ~ To the east there is na adjacent raad, with Steea~ Fivad providing the clvsest access at the very sautheast poa~t~,vn af the plat. At this tame there is nat exgecteci to be any t.hrough connectian , to Steen Road. 'x'v the nvrthwe,st, the site is baunded hy Conklin Road to it's terminus and ' intersection with 4th Avenue, which cxantinues adjarent to the plat west far vne-yuarter vf one rnile. It is expected, and shcawn in Figure 2, that Conklin Raad will 6e extertded thraugh the - piat to Fae directiy into Rotchford fi7rive, while at the same time the interseGtian of 4th AVenue , and Cvnklin will be recanstructed sv that 4th Avenue will make a cur►re to ihe svutheast and tie intv Cvnklir► at a 90-degree arigle, Prianary ingress and egress fram this altemative wilI be via Conklin Rvad northlsauth disectly to Sprague ts►Venue. It is expecte.d fihat 4th Avenue will 'prv►aide service directly to asmall portian af t.he proposed multi-faanily, which wiLl be r.onsistent with the ather ?Ofl-plus apartments currently exisking vr prvpvsed alang 4th Avenue. The entire praject will he canstructed in phases as indicated in Table 1. Based upan existing area demograghics and housing demand', it is anticipated thaf the plat wili be built out, in phases, between 1993 and camgieted as early as the year 2000. 'I'he first phase of the develapment is anticipated to be completed by 1995. "This f~rst phase as describeci wiYl include appraximately 58 single family re.sidential units. Subsequent phases are nvt expected to he initiated until after the cvmpletion of Phase 1. ; Allernadve Z T - Inland lpucifc Enginaering Company 6 Sl:ellty Lakt TIA i ' - This al[ernative cvns'rsts of 225 lvts being develaped vver the next seven to 15 years inta 225 single famiiy detached residences. As with Allternatiue 1, this plat wvuld be constructed within that area known as the Spvkarie Valley within Sp4kane Gounty, apprvximacely la miles east of - the City af Spakane Central Business District (CBD). ']'he site is appraximately vne-half mile south and east vf Sprague Avenue and Sulliaaun Road, respectively. At this time the site is nvk bounded by any roads far any appreciable distvzee. Tra the south there are three street termini at the plat bvundasy; Ratchfvrd Drive, Galway 5treet and Shamrvck Street. It is anticipated that with this altennatiVe, the plat cvnFiguration will cannect to all three of these street termini. Of these streets Rotchford DriVe would be the only gubliC street ext.ended ihrvugh the plat to tie directly inta 4th Avenue at Cannery Road, as shvwn in Figure 3. Tv the easE there is no acijacent raad, with Steen Road providing the clvsest access at the very southeast parkion vf the plat. At this time there is nvt expected to he any thrvugh cvnnection - to 5teen Rvad. To ttte northwest, rhe site is bvunded by Canklin Road to it's terminus and intersectivn with 4th Avenue vvhich emntinues adjacent to the plat west for one-quartec of one miPe. Primary ingress and egress frvm this alternative will be vza Rotchfvrd Drive north directly to 4th Avenue. Frvm 4th Avenue access wiil be prvvided to the west via Sullivan Rvad along 4th Avenue vr to the svuth via Sprague Avenue and ConkTin Rvad. The endire project will be r.onstruct.eci in phases as indic,ated in Table 1, Based upon existing area dernographics and hausing demand, it is anticipateti that the plat wi1l be built out, in phases, between 1993 artd completed as e.arly as the year 2000. The first phase of the develvpment is anticipated to be caznpleted by 1995. This first phase as described will Yncluda appraximateLy 56 single family residential units. Subsequent phases are nat expeccted to be initiated until after the completion of Phase 1. Afternative 3 - For this altemative, there are nv reVisions to trie exisfing land uses on the prvposed site vr withim fihe plat area. Inlarrd Pacifec Engrneerirrg Conpany 7 Shc1ley Lake TM ExEcUTrvE svMAL4,er CON+CLUSInNS - Altemative 2Vo. I BaSed {]pQIl t1e analy515' ield observations, assuanptivns, methodolvgies a.nd resuTts which are pravided in tk+e bvdy of this dvcutnent it is concluded that for AlUernatiVe Na. 1, develnpment - of Phase 1of the SheHey La.ke pro}ect can be implement.ed vvithout having a significant impact to the vverall area transpat-tataon system. Additinnally, subsequent phases of completion may hawe no affect to the transportativn systems wiihin the irnmediate area depend'rng upon ar►y - planned v_r propeosed iransportatian system inapravements. The follewing are camclusivns reached ansi documented within ihis document: • By 1495 with backgrvund valumes present a11 study area intersections will aperate within ac.ceptahle IeVels of service; 5nllivan and Sprague (LDS D), Sullivan and 4th ( LOS E), Sprague and GQnklin (LDS C) and Sullivan and 16th (LOS E). Althaugh these intersections are eurrently on the margirrs, there is capacity for additianal westbvund and nvrthbound mavetnents. + Should the nveralt development and growth of the area be maintained at nearly 3.4 percent, twv of these intersection are expected to fail prior to develvpment of this praject, they are Sullivan and 4th (LDS F) and Su11ivan artd 16th (LOS F). T`his is due ta westbvund tv northbvund lefts and higher thraugh volumes. • After the full developtnent of the 58 single family units, at the campletion of Phase 1, all study intersections are exgected tv remain at the same background leveI of service as prvjected. This does not mean khat thrs development wi11 nvt add additivnal vehicTes to the transportativn system, oni}+, that the intersectians for 1995 have the L4S capacity fvr the increase in backgrcrund traffic and the development of the Fhasce 1. • T'hat wtth the completinn of fuli buildvut of Phase 2, by 2000, SeVeial inteFSeCLionS Will need improvements ta allaw the volume of anticipaced traffie ta pass at reasonabTe 1evels of service; Sulliv an and Sprague, due tv the design of the plat directing trips to Sprague via Cvnklin, during the PM pealc hflur (hy adding SO - 30 left tut-rrs frvm this project, added to the 1995 expected 42[] existing FM peak hour left turns) wiU push t11is intersecLion beyond it's capacity to senre left tums, it should be nated that the as a rule of thumta, for either right tuming or left turning vehicles, the threshald as identified fvr a separate 1ana iS 400 aehicles per hour. Additionally, the Sprague and Canklin intersection during xhe PM peak hour will drop tv an LQ5 of ElF, with LOS E, heing the mia►imutn standard far an unsignali2ed intersectian. Therefvre, it has beer► recommended that in the event that either the AM ar PM nvrthbound to westhound left tL1m5 tAeglII ti] e7Cper1LIICe e7CCeSSPVe deIayS, a traf'f're signal should be insta]1ed1 hC1YVPvVPvr1 at least farar warrants for such signalization srivuld he anet. Inland f'acific Engineering Compursy 8 SheIley CaIre TTA i At this time, and lby utilizing the graw th rates fpr the oaerralT area, it is unclear as tv whether tlne cievelvprnent of Alternative Nv. 1wauld require the improvements recarnmended due to it's deVelopment alvne. As was praven, that wit.h other area deWelopments these improaements are recammended and required in same iristances ta aallow thrvugh traffic progression. PTease refer t[r the reeommended mitigation sectivni of ihis diocument for more detail. RECUMMENDATIDN5 - Alternative No. 1 Althaugh the additivn of 58 single family hames in Phase 1, and assvciated traffic will contribute tv the existing traffic currently using the SulliWan Rvad and Sprague Avenue cQrridvrs, the anly - impact wiLl be that t.owards the cumulatiae average daily traf~ic volumes. Based ugon ttie analysis present.ed, as required by' Spvkanc Gaunty, tF►e praposed develapment under thi5 alterr►ative of the Shelley Lake Plat will not haVe any significant impact to levels of service, thraugh the deveTvpment of Fhase 1. It 1T]u5t be Ul3der5f.ood, that Spokane Cvunty, has Ldenti~ied level of service as the indicator far problems associated with develapment and, therefore, based solely vn LQS this praject will have no ianpact. HvweVer, subsequent der+elvpment of this plat in conjunctivn with deveiopment in and, around this area will require the imprvr+ement of several ' streets and roads withln this general area of Sgokane Caunty. At the completivn of Phase 2, for this alternative, which includes all 264 single-family and 196 'multi-family units, atraffic signal mayibe wazranterl at the interseckivn of Sprague Avenue and ~ Ccrnklin Road, this signal wvuld be necessitated hy a eornbination of Factars, first the continueci area deweiopment and growth exclusiye of the SheTley T.ake grvject, arrd Che additivn of Che ' i 5ne11ey Lake valumes. HoweVer, this signal snvuld only be prvaided if at least four sigrial , warrarits as outlined in the Mi3TCD are being met. If tYiis intersection meets warrarits and the signal has nat been installed priar to Phase 2 completivn, then it is recammended that this ' development cvntribute, via arb RiI7, toward it's development arld constructian. Additionaliy, the background traffic sauthbound to easthound left turns wi11 warrarit ari additivnal left tum hein,g requirei at the Sulliuan and Sprague intersection privr to the caanpletivn of Phase 2. If this dual left tum situation is nvt present by the complete buildaut of Phase 2, then it is recsammende.d ihat this develvpment cvntribute, via an RID, towards it's develvpment and consvuction. C(3NCLUSIUNS - Ailernative No. 2 Based upvn the araaiysis, fieTd ahservations, assumptians, methcdalvgies and results which are provided in the body of this docurnent it is concludecl that for Alternative Nv. 2, develogment - of Phase 1 of the Shelley Lake praject carb be implemented withvut having a significant impact ~[O ttie OVeIdIl are1 CTai15pL]t'fatiQri 5yStef;t7. AddltiDriaIly, subsequent phases of completivn may - har+e no affect ta the transportation systems v►+ithin the immediate aFea depending upon any , planned vr prvpvsed transpvrtativn system impravements, 'I'he falIawing are conclusipns reached and dvcaaraaented within this document: Inlu►ari Paci,fic Engineering Co»tpany 9 ShrTlcy lake TI4 ~ ~ 0 As with Altemative Na. 1, all 5tudy area intersectaans in 1995 with backgrvund vvlurnss added will operate within acceptable 1eVels of service, Sullivan atad 5prague (LOS L7), Sullivan arsd 4th ( L9S E)! Sprague and Conklin (LO5 C) and Sullivan and 16th (LOS E). Althflugh R,hese intersecfions are currently on tFle It1$fgl[15r there is capacity fvr additional westbciund and northbound movements. • As with Alternative No. 1, if the overall develagment and growth of the area is maintained at meariy 3.0 gercent per year then two of these interseetivn are expected ta fail priar ta develvpment of this prvject, they are SuUlivan and 4th (I.QS F) and Suliivata and ldth (LOS F). , • After the full develQpment of the 56 single family ur3its, at the compleGon of Phase 1, the 1eve1 of senrice of the Sullivan Rvad and 4th Avenue interseetion wilI be beyvnd the capacity of this inkersectivn to serve riot only the existing apartments, currently under constructicrn but alsa any additional traffie from tl9e propased She1Pey Lake develvpmenk. 7'herefore, withaut any plat revisions far Altemative No. 2, this inCerseccCivn wi11 ne@d to be rompletely rebuilt with signalization and left turn lanes on all approaches. In vrder to rninimize the mitigation fram Uhis alternative, iC would be recommended that this alternative, be reconfigured tv join Rotchford Drive and Conklin Road as a through rvad d1T~~~ to Sp1"dglle. Tr1E FeGQT1figUIat:lUPl1 under the existsng zoning wvuld lead to ttae lvss of hetween three and five lots as cuffently shown. T'he fourth a.nd Sullivan intersection reconstructian is nvt solely the cause of this project, aather acombination of current multi-family develvpment along 4th Avenue as well as vther area wide through traffic grvwt'h. ~ For Phase 2, developrnent of this plat (without either the reconstructian of the Sullivan Itoad and 4th Avenue intersection or the re.configuratian of the plai) wi11 not be able to proceed as the adjacent street system will not be able to handle the additivnal traffic Vo1umes. Tn the eVent that the plat is recQnfigured, ihen the mitigation recommendativns as vutlined for Phase 2 rompletion far Alternatiwe Na 1, wili neeci to be implemented as prvgosed. At this time, and by utilixing the grawth rates for the overall area, it is unelear as to whether the development of Altemative Nv. 2 wauld require the irnprovements recommended due ta it's develvpment alane. As was proven, that with other area develapments these imgrovements are recommendeai and required in same iaistances tv allpw thrvugh traffic progression. Please refer tv the recvmmended rnitagation sectivn of this document for mvre detail. lsla►td F'acx,fec Engiteatring Cir►n,pany 10 Shelley Lakt T1A i, HEc(]MMENDATl+aNS - AIternarive No. 2 It is apparent that, Phase I of this, altersiative (56 units) r,ould proceed with very littTe impror+ernents taf the vverall transportation system. H011NeVeL1 further develvpment of this alteimative will require either reconfiiguratian of the plat, sv ihat the recornmendations far Altemative No. 1, wauld be met, vr no further devel4pment past 56 lvts until the Sullivan Road and 4th bvenue i.ntersectivn is cornpletely rebuilt. CUNCLUSIONS - AJternalive Na. 3 For this altemative, ne improvements other than those requared for background trafFc and area grrowth wvuld be required. These impravements wou1d include the follawing: • Reconstructrcrn of the Sullivan Rvad and 4th Avenue intersection to in+clude full signalizativn and left tum chani►elizatiart. ~ 1'he additivn of dual left turn 1anes, bQth narthbound and southhaund an Sullivan Road - at the Sullivan and Sprague incersection. RECOMMENIi.9,TIfJNS - Alternative No. 3 . The recvznmendation fos the Nv Build altemative would be that the innpravements Iisc.ed above proceed either by the County or through area wide RID's, and that future deuelvpment, must in sorne way continue to guarantee thr o'ugh Eraff c progression and apprapriate levels of service. ;In1¢trrt Pac:'fic Engineering Cv,mpany Shrlley Lnke TL9 3 ' EXISTING CONAITIrDN~ EXrsTrNG CaxD177oNs Land u~e At the present tirne this prvject hes directly adjacent to a,nd sauth of the previvusly developeci Rotchford Acre Tracts aaid west 4f the Shelley L,ake Gravel Pit, as staown in Figure 2, Site Flan. To date the Ratchford Acre TraGts haVe been full'y developed into single farnily residential lvts ar one acre or more. T'he existing develapment site zaning is SR-1 and [Tlt-3.5. The prvposed zoning for both Altematives 1 arrd 2 includes both the SR-1 and UR-3.5 designabivn, while Alternative 1 also includes zone LTR-12. A brief description of each zcrne type fcallaws. Table No. 3- Existing and Future Zoning ZONING : ZDNIlNG 7'ITLE AND DFSCRIPTI0N f , . . , SR-1 Suburaan Residential - 1, 2nne, The puzpase of this zone is tv allow areas of moderate density residential as the priznary use and agricultutal as a secondary use. This zone anticipates a general residentiaI character with only limited agriculturaI activzties permittecl. UR-3.5 Urbaa Residentiad - 3.5, 2one, The purpose of this wne is tv - implement the lvwer density range nf the Llrban Category and is intended to proznvte azeas vf primarily single-famiiy residential use in an urbanized setting. i]R-I2 Urban Residential - 12, Zone, The purpose af this zone is tv set standards fvr the vrderly develvprmenC af the residentiaY praperty in a manner that pravides a desirable liuing enviranment that is compatible with surrounding land uses and assures the prvtsction of prcrperty Values. UR-12 areas typically include muYtiple-family dweZlings freqvently used tv prvvide a transitivn between lvw-density residential (T]R-3.5) and intensive business or multi-family zones. r - Spok- e:o-ry ,emnma uepuO-r, e-me [Dft At this time the groposed Shelley Lake Plat and rezone has prapr3sed land uses cc3nsistent with the averafl SpvYcane County, ComprehensiVe Land Use Plan. Additionally, the existing land uses directiy adjacent tv this der+elvpment are SR-1 and UR-3.5. T'herefvre, the proposed - developrnent is consistent with existing adjacent iand uses. 1nlant! Pac~fec Lngrneering Cnmpany 12 Shelley I.ake T1A i ErWing Roaaways As can be seen fram the Vicinity Map, Figure 1 and the Site Plan, Figure 2 this progvsei develapment fvr both Altematir+e 1and 2 wi.ll be direetly served by the fallowing streets and roadways. ' ■ Sullivan Raad ~ Sprague Avenue • 4th AVenue • Cvnklin Road • Rotchfard I]rive Sullivtan Rvad is atwo-way, narthlsauth rnajvr arterial within the Spokane County rvad system, with a posted speed limit af 35 MPH, which serves those adjacent land uses between Trent Road ' (SR 29(7} to the north and the terminus af SuLlivan Rvad to the sauth a4 40th Avenue. Thraughaut it's 1eng,th the 1and uses al'ong Sullivar► Road vary, from single faxniiy residential, to multi-family res'rdential, r.ommerci~l and industrial. Within the direct project Vicinity, between Broadway Avenue and 4th Avenue, 5ullivari Road is baunded by primarily comrnerciaY use5 and aoning, see Figure 1. I3ue to the prvposed cvrnrnercial grvwth within this general Va11ey area, the County in combinativn with developer participati~n is in the prc~cess vf improvir~g that sectian of Sulliwar► between Interstate 40 arid Sgrague AVenue. These improvements are scheduFed within the next , year. The propvsed imprvvemerats 1n:clude itnprarrements to the intersection with the 1-90 - eastbound ramps, the Sullivan and Mission Avenue incersectian, the Sullivan and Braadway _ intersection and the Sulliuan and Sprague intersectivn, by eonstructing a two-vvay seven Tane i' roadway frvm I-90 to Sprague Avenue, At Spra$ue Avenue this scven lane section (incZuding - SB to WB Right only and a WB wNB right tum lane From 5prague) will rnatch into the existing _ 5-lane section south vf Sprague. ' 5outh of Sprague Arrenue Sullivan Road cvntinues as amajor arterial, with a twa-way five larre _ section fvr approximateTy ane-quarter rtaile where a twcrway, fvur larie 5ection begins. This faur lane section exiends from approximately 2nd AVenue south to 16th Avenue where Su1Tivan begins to become an awkward, twv-way twa to three lane section dependirig upon the _ intersecting street. South of 16th Avenue Sullivan is a two-way tvuo lane roadway with a left ~tum.i.ng Iane insialPea at 24th Avenue. I getween, 4th Avenue and Sprague, Sullivan has curb ' gutter and sidewalk an bottr side5 of t}t'e rnadway far pedestrian uses. ~ Sprague Avenue is a two-way, eastlrvest majvr arterial wif.hin the Spwkane Caunty road sys#.em, - with a pvsted s,peeci limit of 35 MPH, Ithis facility serves thvse adjacenc land uses between the _ +Cit►r vf Spokane CBD to it's eastern ternninus at Interstate 94 in Greenacres. Thrvughaut it's 1ength the land uses a1c3ng Sprague Avenue aary, frarn single family resideratial, to multi-family tnTand Paaf c Engineering C'ar►3puny ~ 13 shelrey Lekc TIA I ' I' I residentia}, comrnercial and industrial. WittQin the direct prvject vicinity, between Sullivan Road - and Conklin Rvad, Sprague is bounded by primarily commercial uses and zoni.ng„ see Figure 1. Within this area, the roadway sectian ori Sprague varies frvm a two-way seven lane roadway with curbs, gutters and sidewaLks vn ttze western leg of the SuYl.iVan and Spra,gue intersectivn co ; a t,wo-way fvur 1an+e rc3adway at Conklin Road, with a distinct rural cross-sectian as no curbs ar sidewalks are includeci within this section, and access is acrvss agraWel shaulder exeept at paved approaches vr intersections, such as Conklin Rvad.. 4tta Averuue is a two-way, two lane, 25 MIPH, eaStIWeSE 1oCaI aCCe55 5trf.et eaSt Of SLlU1VaII aI3d a twv-way two lane major cvllectar west af Sullivan Road. East af 5ullivan, 4th Awenue pravides servic.e w the adjacent praperties, providing littTe thrvugn traffic prvgression beyand - SuIlivan. Between Conklin and Sullivan, fvurth has s"rdewalks and curb and gutter where adjacent development has constructed these imprvue,inents. Between the project site and Sullivan, it as expected tlaat the narth side of she roadway will har+e a cvntiarraous curb, gutter and sidewalk, as al1 the available property wi11 be developed inta multi-family apartment units. It is expected that by 1994„ 4t,h Avenue between Sullivan and Conklin wiTTl have approximately 700 to 900 apartment units aecessing SulliVan Raad via 4th Avenue. Conklin Road is atvo-way, tvNV lane, 25 MPH, northlsvuth lacal access street, which runs behween the project site at 4th Avenue and Sprague Avenue. For a short partian nvrth fram 4th AVenue, CQIIkIIil h15 Cllr] SI!d $UtteI On the WeSt Slde Qf tIe 51reeC, alang the existing mobile hame Park. The a-est of the road, has gravel shoulders and provides access orily to those adjacent property awners. Wighin this area land use as mixed, primari9y betrveen higher density residential, such as the mvbile hame park and commereial uses alvng Sprague Avenue. Ratchford I3rive is a twv-rvay, twa lane, 25 MFT3, northlsou#h 1ocal access road. This facility provides itsgress and egress service to adjacent residential deVelvpment alvng it's length. Currently, Rotchford AriVe, exists between 16t,h Avenue tv the sout1h and the ssnuthern baundary vf this plat. 'I°here are two connections direcdy to Rotchfvrd, one at 12th Avenue, which c.onnects tv SulliVan, and anvther at 16th AWenue which alsa ties to Sullivan Rvad. ,57"UI)Y TNTERSEC7If?N5 Basel upan the grvject scoping meeting as well as requinements of Sgvkane Gouncy Engineering, the Follvwing intersectivns in the site r+icinity were identified far analysis. ■ Sullivan Road and Sprague Avenue • Sullivan Road and 4th Avenue ■ Sprague Avenue and Conklin + Sullivan Raad and 16tln Avenue Island f'adf c EnginGtrrng Campa►ry 14 Shel2ey Lakr TM 'I'hese interssGtions have been analyat I d for level of service (L,DS) as included within tatter sectivns of thns ciocument. . Tmf', fic Valurnes artd Peuk Hours of drllpenttiore Facisting tuming traffic movement vvlumes at the identifed intersectivns were determined from actual traffic counts taken by the staff of Tnland Pacific Engineers (TPE) during both the AM and FM pealc hvurs Yn June and July of 1993. In addition ADT i+alume infvrmation was proaided , by 5pokane Councy and SRC far bath Sullivan Road and Sgrague Avenue. `T`he resulting - ex.isting vvlurnes are shvwn in Figures 4 and 5. Based upcrr► this tra.ffic r,,ount imfarmatnon as performed fvr this study, the cvrrespvndi,ng A,M peak haurs of operation of the a+djacent facilities are frvm 7:00 to 8.00 AM and the PM peak haurs of aperation are between 5:00 arrd 6:00 PM. Therefore, within the cantext of this study and for analys'rs purposes, these are the reference times for both tlie AM and PM gea.k hours. Since the weekday AM and PM peak hours have been zdentified as the time pericrd when ttte greatest traffic demands are placed an the surrounding transportatian system, this will be the tiane period utiliaed by thf s study for analyaing the proposed activn. ~ i , Iptland Pacefec Enganeerirrg CatWany i 15 Si+e!lry.T.clce TU i , ~ ■ i ~ a 166 ~77 <3- 214 3w--3 Cm- 381 ~ 40 ~ ~69 3 8 - L ~ SPRAGLfE AVE SPRRGL9E A►JE r " a ~ - h~~ 2 ~~N q J ~ ~ 16 J" ~ 4(] V] Z 8~ 4 6 O z 16 ~ FQURTH ~ b2 ~ ~ 24 Ln 2? 4 - ~ rrs ,a ~ p w ~ Z h ~ a 1fiTH ~ ~ ~ ~ z Z NOT 70 SCALE ~ • ~ ~ ~ 11►~ '~,~"T ,~I~.~.~~~1.~t~xD ~jA~iC~~~"`~-~IC 1 ~ Figure 4 SHE~.LEY LAKE ~ i ING ~~~r~~~~~~~~ ~ 99I3TAM PE~AKDII~(~l~R sPo~,n~E. w~HiNCr~oN 5ouih 25 A]#omoni 5pokane,ftshington (509) 535-1 41 0 99202 TRAFFI C VOLM ES 1RAFF1C lMPACT ANALY515 r l I ~ c ~~~~i16 aaB ~ ei as2~ .43- 2i 660 511 ~ i5fr 202 .+N~ dN W ~ w N l' SPFiAGUE AvE ~ SPRAGUE AVE ~ ~ co~ ~ n Z 20 ?7 i~I] 5 0 1 C~k7 ~ 25 C) u W Lh I I FC3URTH 0 ov ea n n ss~ ys g r,5.- s _ 10 ~ 3 ~ a4~ ° LL. L) ~ ❑ a 1fiTH r 0 ~ s ~ NoT Ta scALE ~ ~ ~ . f 1NL1'iND 1ACI~IC~ Figure 5 SHEl1E'r' 1AKE EXISTING CONDIT1ONS sPoKANE, WAsH+NGTON ENGINEERING 1993 P~ PEAK HauR 5outh 25 Wtcmarst 5pokone,Washington ~FF1C 6MF'ACT AAlALYSfS (509) 5~s--14io 99202 ~ rJRAFFIG VC]LUMES LEL~EL rJF SERVIGF Signaiized Intersectians LeWel of 5ervic,e (LDS) is a q,ualifiable premise develvpeci by the transpartation pmfession ta quantify drir+er perreptivn for such elements as tradel time, number of stops, total amvunt of stvpped de1ay, and irngeiiments caused by vther Vehicles affarded to drivers who utaUm the ' transportation netwnrk. As defined by tihe Transpcfrttatian Research Bcya.rd in Speeial Report Na. 209, the 1935 Highwav Canaci#v Man~„1. This document has guantified leVel of service into ranging frQm "A" which indicates little, if any, vehicle delay, to "F" which indicates 5ignifiCanC vehicle delay and traf~gc cnngestion and system brealcdown due to volu:nes far exceeding capacity. - Tar signaLized iritersectians recent research has determined that average stvpped delay ger Vetucle is the best availahle tneasure of LOS. This is shvwn vn page 3. The tables on page 3 adentify the relativnships per lewel of servir.e and aaerage stopged delay per vehicle. Using this definitivn as presenteci in the Highway Capacity Marruals an LC35 of "D" is generally cvnsidered to represent ttie minimum acceptahle de5ign standard fDr signalized intersecctians. Tlnsagnalized Intersectaons The callculation of LOS at an unsignaTia,ed or aneltwo-way stpp contrvlled intersectivn required a diFferent approach. The I985, Transportation Research BQQrds, Special Report 209, The Highwrry Capaciry Manuai, includes amethod far eatGUlation the Level of 5ervice (I.OS) at aneltwcti-way stop-cantrcslPed intersectivns. F[3I t3e5e llll$EgnaTIT.ed 1ntersmtI0I15r L45 is defined differently than far a signal controlled intersection in that it is based upon the cancept of "Reserve Cagacity", or that portivn of the potential cagacaty which is raat useci. Leve1 of Setvice in the cantext fvr an unsignalized intersection 15 hased upan the idea of "Reserve Capacicy", which represents that hourly partidn of the intersectians available capacity which is not used. Far unsignalized intersectivns, tF'li5 15 ha5ed upon tha pC7te[1tial av2ilability of gaps an the cnnflictang traffic scream that are available ta make a sgecific turning movement. An example is thaC an eastbound left tvrning r+ehicle must yield ta both northbvund and svuthb[3und thrvugh and left tuming vehicles. Tt there are not very rnany n4rth and sourhbnund vehicles then the eastbaund left tuming vehicle will have mvre vppvrcunities (gaps in the traffic stream) with which to make the tuming movement. Hvwever, as trafFic volumes moth north and southbvund increase there are fewer and fewer appvrtunities in which the westbound 1eft can be made. The transportatian Research Board has determined what 1eVels of servace fvr all intersections shvuld be by designating LOS levels of Athrough F, where an LO5 of A _ represents a free flowing facility with arnple opportunities tv make a specifiC turning movetnent and an LQ5 of F represents a facility wnere there are few if any avaiIable gaps where a specific movement can be made, thus causfng trie mavement ta back (queue) up and create congestaon, 1nland Pscisc Engineenng Company 18 Shelley Zrrke TI4 driver frustratiQn and excessiVe comrriuting delays. 'I'he reserve rapacity concept applies vnly ta an indiVidual traffic mavernent or to sharad lane mvvements. Dnce the capacity of all the indiVidual rnvVement has been calculated and their LOS ' arid the absence af gaps or the expected delays deterrnined, an oWerall eaaluativn of the irttersectinn can be made. Normally, the movement having the warst LOS defines the averall , eualuatian, but this may be tempered by engineering judgement. An LOS of D is generalIy cvnsidered to represent the minirnutrn acceptahle vperational standard fvr an urban intersection and LOS of C the minimum acceptabl~ operativnal standard fvr a rural intersection. All LOS analyses desc~ribed in this report were perfvrmed in accvrdanee with the praredures described above. As a final nate, the Highway Gapacity Manual (I3CM) analysis and procedures are based upon worst case conditians, therefore, the rernainder vf each weekday a°►d thrvughvut the weekends, in many instances experience trafric conditians better than those described within this dvcument fvr vnly the Peak HQUrs vf ❑peration. 7'his is especially, true for minor streeC movernents as the HCM favars the major street and penalizes the aaaalahle gaps vn the minor street theretay, resulting in a very conservatiwe LOS estimate. _ SheUey Lake I.evel of Service and T'~',fac AnaTysis As nutlined above the LOS techniquesh,USPd fOg f.Fll5 Stlld]~ W1LI CIDSeI]~ fQll()W '~L~1(~5e a.S QL~L11F1~ in the 1985 Higi~way Capaciry Manual, TRlB, ,Special Report 209. The scope vf this study hDWeVeI1 will deal primarily with thos'e intersections vf interest as nvCed below. ■ 5ullivan Road and Sprague AWenue • SulliVan Road and 4th Avenue ' • Sprague paenue and Canklin - ■ Sullivan Road and 16th Avenue This project lying within Spalcane Cvunty, is a1'so within the urban grvwth boundary}. T'herefore, far this analysis the lowest acceptable'leve1 of service for a signaiized intersectivn will be an _ LOS of D, whiPe for unsignalized intersecfivns the minimum acceptahle LOS will be an LOS of E. These levels wi11 be threshoId levels for analysis and miLigatian. However, if the I,.US of the existing intersectivn is cunrently at an LOS vf less than an LOS vf D ar E respectively, than _ mitigatican will canly be recammended `to prvvide relief back to the existing delay vr capacity 1eve1 s. ~ - Tab1e 4 Uelavv indicates the existing 1evels vf service experienceci at the identified intersections. These LOS results are fram the iraf~~c Icaunts performed by TPE in ]une and JuZy of 1993. ; I'nland Pacx,fie Engirxeering Gompc►ny 19 Shelfey I,ake Tlrl . I Table Nv. 4- 1993 P'eak HQUr Eaeistiag Levels of 5erviee AM,EXMING` TRAMe vOi.UMES _tiPm EXISMc TRAFFIc VOLUnrMs} , . ~lized ~ta5~~oialixed ~4N1~• ' d UtsIgnalixed I 19 r 42 i xy. F `'j~i' ' De~~ ~ ViC Cao' I.vs ' Dels~y C` ~;Cap~V ~ •Ltp5': Sullit+an Fload and 24.4 0.53 C 30.2 0.79 I? 5praguc Akenue 5ulEivan Road aad 175 D 76 E 4th Awauus Sprague Avenue and 424 A 101 I] Coaklin Raad _ Sullivan Road and 273 C 121 D 16th Avenue , As can be seen from the abave table, all intersactivns are within acceptable tevel of service x,hreshalds for iritersecctians within an urban area. Hawever, the existing 5ullivan Rvad and 4th Awenue intersection, currently operates at or near an LQS of T, during the T'M peak hour. Althvugh not belaw acceptable levels, both the SullivanJ4th and the Sulliwanl 16th have levels of serrice values of LO5 D, during the AM and PM peaTcs, re.spectively. A claser analysis of these intersection levels of service reveais the fQllowing informativn. Su2lrvan 12oad a►td 4th Avenue - As seen in Tahle Na. 4, this intersection, duaing the AM pealc hour operates with an LOS of A, and a reserve capacity of 175 passenger cars per hour (pcph). As descrihed earlier, far unsignalized intersections, the L[]S fvr the intersection is the lorvest LC3S experienced by any one leg of the intersection. T'he AM peak hour LOS of D at 175 pcph, is fvr the eastbvund leg of the intersection. Far this prvject it should be nflted that the westbaund leg, or the Ieg rivhich has the ptrtential fvr traffic ffrvm this propvsal, has an AM peak hour I.QS of B with a resenae capacity of 312 pcph. For the PM peak hour, as shown in Tabpe No. 4, this interswtion operates with an LQS of E, with a seserve capacity of 76 pGph. Unlike the AM pealc hour, however, both the eastbaund arsd westbound legs of thrs intersectivn function at or nea.r the sarne levels, please review the agpendix far LOS calculations. The grirrsary reason for the poor Ieve1 of serrricE as the c.onflicting left tums as well as the moderately high to high through traffic volumes hvth directivns on Sullivan Rvad and the fact that there is nv tuming 1ane ar refuge fvr le#'t tums at this intersectivn. Sprague Avenue and Conklin Road - As shown in Table No. 4, during the AM peak haur this interseetion franctians with an ;LQS of A, and a reserr~e capaci#y of 424 pcph. However, during Tnlund Parific Enginacring Company 20 Shtlley Lak,e 77rl ~ the PM peak hvur the LC]S for this intersection falls to and LQS of Ia, with a reserve capacity of 101 pGph. 1'his leveT of serwice is for the southtound leg o#'the intersec4ion. The northbsaund Teg, or the leg wluch will be direccly affected by this proposal, currently vperates during the PM peak hvur with an LOS of C, with a reserve capacity of 274 pcph. This level of service designation is adequate fvr an urba,n unsignalized intersectian. it shauld be naEad that the sauthbourid LQ5 of D, was for an intersectian leg which had only q lefft tums and S right tums. Sullivan Rvaai crnd 16rh Avenue - As shown in fiable No. 4, during the AM peak hvur this intersection vperates with ars acceptable L(?S of C, with a resenre capacity of 273 pcph. As with the vther intersections, during the PM peak hour the 3eve1 of sen+ie.e far this intersectivn falls to an L()S of L), with a reserve capacitiy of 121 pxph. Again, the identified LflS is fvr the far - leg, or eastbaund leg of the intersectian. The near leg, vr the le,g with the pvtential to be affected by this propasa.l currently operates during the PM geak hour with an LOS of B, wirh ~ a reserve capacity of 385 pcph. , - It shvuld be nnted, that Su1Zivan RQad functioas as a high cammuter route bet►ween Interstate 90 and 1,hose residenfial areas south of 5prague Awenue. Therefore, the dissimilarity in through vvlumes as shvwn in Figures 4 and 5, will direcily affect all left turning Volumes whether they , be near side ar far side. Cenerally, during the AM ,peak houty the eastbound left turn will , aperate pnorly, due to canflicting gap placement from the narthbvund traffic, and canversely in the evening the eastbvund left wifl have to compete with gaps from the southhound thrvugh , (wvrk to hvme basee) cammuters. This situation, W11I alIT'lD5L alWa]i5 CaUSe t]e e35tbpLl[1d 1~g foX ' bath 4th and ifth to result in poor levels of service. Not due tv excessive vvlumes on the leg of the in#ersectivn, rather due tv the high commuce volumes either north vr svuth and the absence of adequate gaps far entrance onta Sullivan. As has heen nated, these intersections were caunted in June and ]uly, 1993 by IPE staff, haweVer, in additi4n to perfarming a ptiysical cQUnt of these intersections, additivnal mpezatianal , characteristics were observed and not'ed. Primarily alvng it's length, Sullivan Raad from Sprague Avenue south vgerates with arr auerage running speed of 32 to 37 rniles ari hour, based upon the highway capacity manu,al, fua an arteria] street with a gnsteci speed limit of 35 mph, this arterial street would ha►ae an LO5 of AIB. Additianal operational characteristics were vhserved alang Sullivan Road, during the June and 7u1y caunting vperativns. The single largest cvntributing factor ta the pcivr level vf~serwice bnth calculated and measur~ed along this arterial is the lack of faroed gaps and platoons along 5utlivart Road sauth of Sprague Avenue. The term forced gaps refers tv a traffic control devir.e such as a stop sign crr traff c sigrral which fvrces -gaps in the through traffic strem and increases headway between vehicles. The other, significant obserr+ation ravas the lack of pIatQans, alvng Sullidan Raad, which also results in staggeretl vetucles between platcavns and few gaps fvr left tuming side street traffic ta malce the intended movement. d6servations, clearly indicated that the nurrzber of tuming vehicles from the side streets were not significant as to their imanediate volumes, but after several minutes of no-gaps along 5ullivan ~ ~ Tnlaru! Pudfic Eng+neering Cornpany ~ 21 SheTley Lake TL4 ' I 4 , Road, they wvuld begin to queue up along their respecti►re legs. During bvth the AM and PM pe.ak hvur, it was not unusual ta observe, three to 5even vehicles queued up wairing to either , cross or make tums at the intersecting crvss streets on SuTlivars Rvad. The preserrce of these _ Vehicles, in a queue, is primarily due to the randvm natnre of vehicle gaps and speeds alang Su1liVan Rvad. A more gn depth analysis, revealed that during the AM r.ommute, the narthtound upstream vehicles, svuth of 16th Avenue, could enter nnto Sullivam relatively emily and at will. _ However, as these Vehicles began their commute, they would be joined with additional vehicles, ' at approximate 50 to 150 fvot headways. 7'his type of headway, is usually assQCiatei wi#.h a relatively gaad artsrial LOS, which was o'bserved tv be tetweEn LOS A and LOS B. However, ihis type of free flvw, does not allow the additiaraal side street traf~ic nvrth of 16th Avenue the opportursity to enter the traff're scream. Conversely, during the PM peak taour the southbound traffic which is allawed to enter Sullivan thrvugh the Su1livan and 5prague signalized intersectivn, do so in a rathez dense platoon. Howerrer, given that there are nv traf'fic control ' de►+ices alang this rQUte (stop signs or signals) the traffic is al10wed tv r+each a free flvw speed with increased headway. Durirtg the PM peak hour, the only gaps created in the Uaffic stream are when a sarathbaund vehicle turns leFt, eastbaunti, therehy slvwing down follvwing 5u]liiWan ' Raad traffic until the mavement carr te made. Hawever, due tv the width of SuI1ivan between 16th and 40th Avenues, this situation ean rearly only vccur at those intersectivns south of 16th Avenue. ' In the event thak gaps were avai1a61e, the queue of rwa to seven Wehicles could be reieased by a gap as small as 14 ta 12 secvnds. There, are se►+eral exceRent resources fvr gap prvgressian, but for this analysis we have used Greenshield's, Queue Dischttrge I]ata which states that a gap of S to 12 secands will accomrnvdate between 4 and 5 cars in the queue, which is the upper lirnit ~ of the aVerage number of cars experiencecl in any vne left tum queue. Therefvre, hased rupon actual gap timing and field ohservations, the operation of the unsignalix,ed intersections alang Sullivan Roadr W1th 711 LOS aF E, with the addition of gaps could rnaintain better levels of service than indicated in the i.47S ealculatians as outlined in the HCM. As ihe highway cagacity manual d'oes not deal we11 with gap relationships in travel pattems and does nvt have the ability to analyze adequately this juxtaposxtian in pattems. War►iant Analysis Although nv actual warrant analysis was performad, the Sullivan Road arid 4th Avenue intersectivn hy inspectivn MAY warrant a traffic signal due to rneeting the criteria far Warrault No. 11, Peak Hour Warrant, as outlined by the Manual on U,niform Traffic Ccrratrol Devices {Mi]T'Cl]). Irrla►rd Paer'fic Engincarrrsg C,gmpany 22 SheIley T ulre TIA i , TWfic SC{fety • Accident summaries aWaalable for the most recent tltree years (12101189 tv 12131192) frvm WSDUT and the Spakane Cvunty files for the identified intersectivns within the Shelley Lake Vicinity were assemble.d. Generally, accidents are dvcumented by type of occurrence, such as Propert}' damage (PDCD), inJurY (&7j and fatality (FAT), as well as aVerage frequency per millivn entering vehicles (per MEV). This racio is a functian af the aVerage daily traf~ic entering the i.ritersection and the annual fi-equency of accidents. Table 4B dvcuments the accident rate per MEV for the identified intersectivns. , Tab,e Nn. 4B -Exisfing Accident Histary '90 ta 192, 5helley Lake Vicinity - ACC~a~i' `s~`A~~CS ' MI.3.1V.AN kC1AD IIMMS'ECMdIVS . ~ "e^section , 1990 ; • ~ , '1~?51 ° ' . 45192 ` . Per - 5vlIivan Rvad " P~ ~ ~ ~ FAT ~ P~1Cl 1 ••AY] ~ .FA'' , n(l ~ TIV] ~ FA'T ~V Sprague ~ 12 ~ 14 24 I 11 ~ 0 ~ 24 ~ 1$ ~ 0 ~ 3.17 16th Aveaus ~ 0 ~ 0 o ~ 0 I 0 I a ~ i7 I a ~ p I d I SPi`a8uelCvnklin ~ d ~ 1 ~ 00 I 0 ~ a ~ Q I ❑ I 0 ~ a As shown in Table 4B, accident rates varied between 0 and 3.17 per MEV. With the excegtion for the Sullivan and Spragtae intersection, these rates are ke1aw ac.cider►t trends for principal _ arterials within the 5tate of Washingtan, as weli as below national trends for this t}=pe of facility. However, the accident rate at the Sullivan and Sprague intersection is at or abave the average ' accident expectancy for an intersectian of this type and geometry. Generally, for urbarr intersections, an accident rate of 1.6 accident5 per MEV i5 considered ko - be ai the uppeT limits af average. Per the WSDQT annual repcsrt, the aWerage accident rate for an urtian principal arterial such as Sullivan Raad is roughly 2.4 accidents per MEV. It shvutd be noied Lhat even tkiough accident rate threshalds are not exceeded actual safety prablems may ' i not be apparent until accident tecords are inr+estigated by tAx of occurrence. _ Bassd upnn the types of accidents and their severity within this area, the improvements to the Sullivan Ftoad and 5prague AVenue iritersection shvuld reduc.e the existang accident rate vf 3.17 MIEV w near the state aVerage accident rate vf 2.4 MEV. Inlanrl Paref~c Engrnernng Company 2~ 5he1Try 7a1ca TL4 ' r i , • d i ' I , Planned 7'ronsporta,tian ImFrovemertts A review of the 5ix-year Transportatian Improvement Pragrams (1993-199$) fvr Washington State Department of Transportatian and Spokkane Cvunty indicates t}tat funding has been allQCated fvr work vn twv praje.cts within the immediate area. 'I'hese grojects are as listed below. , I. SuWr+an Road, Interstate 90 to Broadway AVenue, 1993-1995. This project prap[rse5 to widen the existing Sullivan Rnad to seven-lanes to proWide access to a proposed shoPPinS cent.er develvpment at the nvrihea►st corner of the 5ulliv~an and Brvadway interseciivn, and wiYl be designsd to m€et exisdng 5pokane Cvunty aRerial standards. 2. Sullivarrt Rvad, Broadway Avenue to Sprague Avenue! 1993-1995. This project proposes to widen the existing four-lar1e section of roadway to seven-lanes and w match with the - propvsed project directly nvnth of Brvadway Avenue. This prnject has been pragvsed , to improve existing, level vf servace along Sullivan Road and provide thrvugh traffic , prvgressian alvng this corridor between the existing and prvpvsed land uses to the south - of Sprague Avenue and Interstate 9[]. As with the northem sectivn this rvad will be designed to meet existing Spakane Caunty arterial standards. Trrland Pac ftc Enginecring Coi►pany 24 Shclley Lrke TL4 FUTURE YF.A,R TRAFFIC IMPAGT ANALYSIS ! ANA,LYSIS ASSUMPTI'ONS AND METHDDpLOGIES Future year moming and evening weekday peak hour ampac4s of che patential traffic generated by the prapvsed 5helley Iake project were analyzed for each development alternative as fcallows: ■ The project description, planried year of buildvut, location and size of the prapased 5helley Lalce project were canfirmed, as were estimates for maximum unit buildout densities and reu►ned areas. ~ • T"rafFic generatian estimates of che future mvming and evening peak hour trips far the complete buildout were compleGetl and a.ssumed to be by pha5es, vE+ith Phase 1 completed by 1995 and fuflx buildvut fQr Phase 2 by 2000. , • aackground traffic volumes on each key transpvrtation system element were deterrnined privr to superimpasing the traffic impacts af the gropased 5he11ey Lake prvject. This included adding any known pipeune prajects, sucta as Ridgerraant, Nlomingside, Fred - Meyer, ekc., as v►+ell as allvwir+g for t-ansportativn system growth at 3.0% peF year for those streets intersecting with Sullivan Rvad and 5prague Avenue. • For Phase I tcip assignment, Conklin Read is expeeted tv carry appraximately 95-gercenc _ vf all ingress and egress trips with the remainder of the trips using 4th Avenue, By the year 2003, vr at fuil buildvut, Conklin Roaci via RotchfQrd TZriue, would still te expect.ed to carry agproximately 80-percent of all site generaied trip5, wiCh 4th Avenue cartying _ 10-gereent af the remainder and 16th Avenue via Rotchford Drive carrying ihe remaining - 10-percent. This wvuld be true bvth during the mvming and evening commtate times. _ ■ Forecastei traf~ie doTumes, generateci from the ITE, Trip Generution Manuad, Sth Editian were then superirnposed vn the backgrvund trafFc t,o determine cumuiatiue traffic ' impacts. T1ais determinatian was perfarmed for both the moming and evening Peak hvurs fQr the bt3th Phase 1 and Pha,se 2, ultamate buildout. • Level of service arialysis vvas then performed fvr bath the pre-developrment and post- development traffic vvluaries to identify arry capacity or L[75 deficiencies due to the development of the propvsed Shelley Lake project. • Additianaliy, site re1ated issues such as acr-ess design and operatian, intemal site circulatian and on-site parking were then addressed to ensure that the project site plan r.onformed to general traficltranspartation and lvcal area design requirexnents. Inland Pacific Engeneering CamivQny 25 ShelTey LaJke TIA l)EYLi.UPMENT TRAFF'TC Shelley Lake - Alternative IVo. Y 5ite Genemted T"iqf',~c Trip generatiQn estimates were prepared fvr the maximuan patential for this alternatiVe development of the Shelley I.ake project. Hased upon the existing wning code far Spokane Cvunty, apPrvximately 264 single-family and 196 nnulki-family units could be, arid are propaseci, within the Shelley Lake praject site. iI'he trip generation estimabes were determined using, the In.Ttin!!e of TraffiC E'ngirteer5. Trtp Gerrerarion Manua! (TGM), Srh Edrtion. The TGM provides empinical ciata, based upnn actual field ohservations for trip generation characteristics of similar residential developments throughaut the T]nitad States, The alternative as stated will be a development of 264 single family and 196 multi-family, apartment units. The TGM prQVides trip generation rates hased upvn the land use type, ie, cvmmercial, residentia7, industry, schoo1 etc... Therefore, for thas trap generatiqn analysis, Land Use Code 214 - Single Family Detac'hed rand 224 - far Multa-Family Attached fiom the TGM wi11 te used tv determine both the AM and PM peak hour trip generation races. '1"hese rates fvr tatal buildout of this altemative are liste.d in Table 5. As rndicated i.n Table 5, this proposed praject wifl generate various volumes of traffic during - r,ccrostructivn of the several phases of development. At Fhase 1, corrypTetion, which includes 58 'single family residential hvmes the prvposed project will generate approxirnately 43 A,M peak hour and 59 PM peak hour trips. T'he arrticipated tatal nutnber of vehicles which will be , generated thrvughout F.he day wauld be 590 vehicles per day (vpd). Of the 43 ANd peak hvur trigs, 11 trips wibl be entering the site, while 32 wil1 be exiting. Df the 59 PM peak hour tri,ps, 38 trips will be ent.ering Lhe site, whil i 21 will be exiting. - gvr Phase 2alternacive cvmpletion or !at praject buhIdout, this project alternative will generate ~appraxirnateIy 2$3 ANi Peak hour trips and 375 PM peak hvrar trips. T'he anticipated tatal number of daily trigs wvhich will access this site is expected tv be apprvxirnateiy 3,750 vgd. Of ' the total 283 AM peak hour trips, 66 trips will be entering the site, while 217 wi11 be exiting during the AM pea.k hvur. Of the 375~ PM geak hnur trips 246 wil1 be entering the site, while 129 will be exiting, ~ SheUey L.ake - Allernative 1Va. x ' Site {Generated T+r~',fic 'i'riP generation estimates were prepared far tlae maximum potential for this alternative dedelopment of the Shelley Lake praj'ect. Based upan the existing zoning code fvr Spvkane Cvunty, aPProximately 225 single-€arhaly units could be pmpased, within the Shelley Take , project site. ne trip genera#ion estimates were determineci using the Irastttwe of Traffic Irrland Pacific Engineenng Campany 26 5`helIey Lahe TL9 - Enganeers, Trap Genersatia,n Manual (TGM), Srh Edition. The TGM prvvides empirical data, based upan actual field observativns fQr trip generation characteristics vf similar residential - develapments thrvughout the L]nYted 5tates. The TG1Vi proVides trip generation rates based ugon the land use type, ie, cvmmercial, residentiai, industry, schvvl etc... "I`herefore, fvr this trip generativn analysis, Land Use Code 210 - Single Family Detached from the TGM will be used ta determine hath the ANI and PM geak hour trip generation rates. These rates for tvtal buiTdout of this alternative are listeci in Table S. As indicated i.n Tahle 5, this praposef projact will generate r+arious volumes af traffic during eonstructivn af the several ghases af develvpment. At Phase 1, cctirtapletion, which i.ncludes 55 sing1e farnily residential homes the proposed project will generate approximately 41 ANI peak - hour and 57 FM geak hour trips. Tfie anticipated tvtal number vf vehicles'"which wrill be generated thrvughout the day wauld be 574 vehiGles per day (vpd). []f the 41 •AM peak hour trips, 1I trips will he entering the site, while 31 wi11 be exitiflg. Cif the 57 FM peak hour trips, - 37 trips wiu be entering the site, while 20 will be exifang. For Phase 2 altemative completaon vr at projec4 burldout, this prvject alternative will generate approximately 166 AM Pealc hour trips and 228 PM peak hour trips. T'he anticigated tot.al number af daily trigs which will access this site is expected W be approximately 2,280 vpd. Of the tvtal 166 AM pealc hour trips, 44 trips will be entering the site, while 122 wiIl he exiting; during the AM peak hvUr. af the 228 PM peak hour ttips 148 wilY be enterirag the site, while 84 will be exiting. Sheiley I.ake - Aftem.ative No. 3 Site Generoted Tiqf',~c _ For this proposed project altermafive, Do Nvthing, there will be nv additional trips generated than currently are generated by the existing praject site. Inland Padfie Engineering Compqny 27 shedrey Lake TU T'able 5 - 'I'rip Generation - Shelley Lake Plat ~ . , . . _ ,TRIP,CENERA'['ION TABI.E - WELLEY LAKE r xc l~I~er~atiVlS AM PCB~L H~! PI4i 1'earC li'bUr, iA r y . n lY " Pha%e Na. af Lsad Nv. ` InlOut Directional Cwmtilative Rstca Na; inlout Dirw~e~d l7aits IIse Trips ;5plit Distritrution , Yotiumes ~ Tripe Splid ~ Distri&Jtiion , . `Vulusmes„~;; C:ode Gen. ren. ; , ' . . k>, . . , vo! , vol ~,n , out Volx , vvi • ; } Ta otsc !~l ' 'Zn O11t „ • . ~ ' ~tl• , out.,., Alt. I,TO. t I I ~ ~ I I I ~ I I 1 ~ I i I ss I 210(.74) I 43 I 26n4 I11 ~32 I11 ~ 32 1.01 ~ 59 I65r35 ~ 21 38 21 I38 2 ~ 206 ! 210(.74) ~ 152 I 26l74 I 44 ~ 112 ~ 51 I 144 1.01 I 208 I 65135 ~ 135 I 73 I 173 I 94 2 I 196 ~ 220(.45) I 88 I 17f83 I 15 I 73 I66~ 217 0.55 I 109 fi8132 I 73 I 35 245 ~ 129 I I I I 1 I I I I ~ Alt. I - Totals ~ ~283 I i I I66 ~ 217 Il ~375 I I ~ 1246 129 Alt. No. 2 t I 58 I 210(.74) ~ 43 I 26n4 I 1 b I 32 I 11 32 I 1.01 ~ gs ~ 65/35 I 3$ I zl ~ 38 I 21 2 169 I710(.74) ~ 125 I 26174 ~ 33 I 92 I 44 ~ 124 1.01 ~ 171 I 65135 I 111 ~ 60 ~ 149 I 81 ~ I I ! ~ 4I I ~ I I I I A1t. 2- Totals 168 44 I 124 230 I I I I 149 I 81 Land Ust Cade 210 = 5r'ngla Fmniliy Residential Lktaclrtd L.and Use Code 220 = ,+partment f'ha.sc 1 es expes:fed to bt semplere by 1995 Pha.se 2, huildout is ezpected to be ccsnplete by 2000 Irri"and Pasiftc Errgineerin8 C°mpanY 28 She[!ry f,elrr TM iFiIP i/IS`lLlBU71CJi■ ANiP d"1VVJG[•ME[■T 'Hased upon the follvwing criteria trip distribution aazd assignrnent wixhin the general area has - beenr detertnined usi.ng: Existing ADT"s alang the adjacent principallminor arteriallcollectars'and local access • 5~~t5. • Fxisting AM and PM peak hvur directionaY and turning Wolumes alvng 5ullivari Rvad and ' - Sprague Avenue. ~ Freld observatians of prirnary driVer characteristics deterrnined during actual field observatians and intersection caunts. Regivnal employrnent daca frvm the travel foremting mvdel pravided by rhe 5polane - ' Regianal Council (SRC). ; • Future land usse projectivns provid'ed by Spakane County. The resulting estimated t.rip distributian is shown in Figure 5. The resulting trip assignrnent to the existing =sporLation systeen is as shawn fvr Alternative No. d in Figures 7 and 8 for Altemative No. 2 in Figures 9 and 10. As shvrvn in Figure fi, 62-gercent of the site generated trips have been dekermmined ta be fromlto the nvrth. This carresponds with thase trip distribution rates as prauided by the Sgokane Regional Council, employment data mvdel. This data from the SRG provides emplayment and non-employment areas. These areas then determine the destinatiom of the mvming home-baseci to work and evening wark to 3tome-based trips. The actuuai trip distribuCian when rutt an the 5RC model incorporates, land use, street type (classiFicatian), sixe (nurnber mf Ianes), speed (pvsted) and several other social and economic aspects vf the averali area. Fram this model, then an existing or praposed trip ca,n be motieIed to determine the aetual, or nearly actual path that the vetticle and it's accupants would chose to ar.cess the appropriate land uses. The critical factor for this analysis is speed and grogressian, the computer ogtimized these twv factvrs tv determine what will te the least time dependent raute arsd then adds the cammuting vehicle tv that ruute. BACRGROUND TRAFFTC I)ue w the grawth which has raken place rvithin the Greater Spokane area, growth rates for the area svufih vf this projeact r+icinity vvere obxainod frvrn both Spokane Cvunty and 5RC. The input fiam the Cvunty indicated that the generaY northbvund aLnd southbvund through volumes alvng Sullivan Road shvuld te increased by 3.0 percent per year, far the iwenty year period analyr.ed InJaru! Pacifit Engincering Caz►+pany 29 Shallry Lake 7Z4 - (1993 through 2015). T'his increase in thrQUgh traffic valumes wauld apprvximate the existing growth rate which is expected to canttir►ue thrvughvut the duration of this project. For those arterials, collectars and local roads adjacent tQ vr int.ersecting with, including Sprague Avenue, a 3.0 percent per year growth rate was used. As with the grawth rate associateid with Sulliuan Road, this rate will be applied to all, a~rea str~ts aver the twenty year perivd an~yr.ed (1993 throu,~h 2015). ''his iricrease in t~fc valumes along these streets, as with 5ullivan Raad, is expected w cQntinue tirnu$hout the duration of this praject. I ~ , i ~ ~ hrland Pacific Engineerrng Company 30 Shellry LQlre TIA ~ Wen AYs, ~ . 500 AY. Spa~arte `R Boord „ ~ Aw. ~ . vo. ~ BDgng&U . ~ C4, vi 11000 UAlren cL w ~ ~ nnn ci erud"N prlnpli~le 6 rln kld Ave #m Ave. ~ C d Ave• ~ A . ~ ~ A[tl Are all" A+n. ~ 001 ~7S r-flf @ H!r 9 ~ kl n H}a6 ~ Niran r ~ ~ Yal WI Aw. ~ I A Aw. R Irr~. WA . • w ~ r~ 3nd Ave ¢ ~ d Aw ~ 3rd Ave. 3rd Ave ~ ~n tnd A 2n Aw. k VaTLV s , ~4ih A. ~ 2 ve ~ 00 Sth Aw. ~ SS13 Ave Sth A ~ ~[h Ave ~ M Avia Bth Are Ct . 7lh Ave 81h Ar~. v Atlro Are. t~C'i ~ . Are ~ 9th +m w~ ft Ave Ave ^ry m 1QIh +M. 14fhAre ~ ~ it 11AYB ih Acn. 1S~ A. 91 ve v • ~ ~ , QAva ~ ~ ~5 Ave t3Rfi Ave J P31h 1 Ad~ l Aw 1 . ' 1 ~tt~ Aw 14th Ave r~ 14 Ave , 14Eh Aw. 13th kre I 1 St7i A». 115 5th J w 7 Slh ~ ~ r W 9 ' i 18lh Ave 4ft Ave T'ps A (rr w. iAvs, FT i AfAI , ~ p Va Aw ~ ZtIC~ Rvr. `yp L ~ 1st Arr M -;ive + IFIC Figure 6 s~ELLEY LkKE ~ , ENGINEER1NL,.T Tri p Di s tri buti on SP[]KAIVE. WASH[NG30N South 25 Altamvnt Spokane,Washingtvn ` (309) 535-1410 99202 TRAFFIC IMPACT ANALYSIS r 1 C4 I ~ 4p~ I ~ (22)13 29(4)-> . a ~~p If W~ I ~ sPRAcUE AVE sPRwcuE AvE , a ~ z 71 v ~ V) ~ ~ ~ FOtJRTH [ C ~ v ~ cs ~ ~ - ~ 0 1 fiTH ~ ` , o ~ a~ ~ I ~ J ~ ~ ~ N t ~ PM PfR?4 (AM pEp,IO NQ7 TO SCALE ~ 0/ (INLA1r D PAC1F1C F1GURE 7 ■ r SHELLEY EA1tE N ENG1NEE1`lN4T ALT No. 1 - PHASE 1 SPUKA3VE, wASH1NGTQN - I TRfP DISTRIBLITION ^ 5outh 25 Mamont Spakana,Wflshing#vn J~ 7R,a,F~1G iMPACT A~IALYSlS ~ ~ {509} 535-1a» 99202 ~ ~ _ AN~] ASSiGNMENT m 1D 'k~, (77)51 j z4(5s) -=C> .*-(e})ia ~Ncc L SPRAGLIE AVE SP'RAGfJE AVE ~ ~ z - ~ ~W ¢ z ~ U (1a)9 ~ [f3 ~ (S) m ~ u ~ dFOUfrTH tn ~ ~ ~ ~ <0=- (si)ia ~ ~ ~ ~ ~ . ~ Q 16TH ~ ~ ~ ~ _ z ~ ~ ~ PM PW ~ (A'" PM) NOT Ta SCALE w ~ ` iNLi7.i ~ ~ ~~~~~ICI FjGURE 8 ■ ~ ~~EL~U LAKE ENGINEERING ALT No. 1 - PNASE 2 s~OKANE, wASHiNGTQra Svuth 25 Wtomont Spokana,WashPngton TR1P D@STRfBUT1C}N ~ , (sos) 535-1410 99202 ~ ` AND A5SIGNMENT ~ TftAE`FIC 9MPAC7 ANALY5I5 ~ ri ~ ~ ~ ` 2~ ~a V , SPRAGIJE AVE SPRAGl1E AVE a ~ z J, (23) i a sn z 0 1 U i FflURTH nc 0 ~ r ~ ~ ~ _ 7 57Fi a ~ ~ - z . ~ J ~ Phi PEA1C (r,r~ PE4X) NOT TO SCALE ` INLAND PACIFIC ` f FIGURE 9 ~ ~~~~~U LAKE ' ENCIINEERIfiTG ALT No. 2 - PHASE 1 s~OKANE. wASHINGTON 5outh 25 Altcrtront Spakane,wo$ningtpn TRIP a15TFiIQUTfON (509) 535-1414 99202 ~ ►4ND ASSZGhIMENT ~ ` TRAFFtC !MPACT ANALYSIS C ~ 0 : _ J,~~~ ~ > ,sc,ey~ ~y~~~~l ~ 1hyn~ 4 ~ ~ f! v A e'4i" I; SPRAGU€ AVE ~ r SPRAGUE AVE ~ cr z I ~ ~ i z D ~ t~k= (94)73 , ~,7 3 c 2 5 , ! FOURTH ~ Q U- ~ ~ ~ - ~ 0 16TH a: _ c5 ~ z ~ § ~ PM PIEHK r~j} I (AM PEAFC) ~ ~ N0T TO SCALE i ~ 4 INLAND FACIFIC nGuRE 10 ~ f sK~~~U LAKE ENGINE~~~NG ALT Na. 2 - PHASE 2 sPorcANE. wASH3NGTOra 7R1P DISTRIBUTiON 5outh 25 Alfamont Spokane,Washingtor, ~~p,~~~~ IMPAGT ANA~Y51S (509) 535--1#10 99202 ANC~ ASSkGNMEN~' FUTURE YEAR LEVEL OF SERVICE For all alternatives the background growth is expected to be consistent and non-project dependent. Therefore, background levels will not be analyzed for each alternative. Background Future Year Level of Service To the existing volumes counted at the. identified intersections, the background traffic volumes shown on Figures 11 through 14 were analyzed to determine the impact of non-project related growth. The resulting levels of service for Phase 1 are shown in Tables 6, 7, 10 and 11 and for Phase 2 buildout in Tables 8, 9, 12 and 13. As can be seen from these tables the additional volumes resulting from a combination of area wide vacant property buildout as well as the continuing background growth pattern of 3.0 percent per year will have significant impact, in some places, during the AM and PM peak hours through the completion of Phase 1 in 1995. However, the resulting traffic volumes due to background growth alone, will result in several intersections failing to meet even the minimum requirements of Spokane County for Phase 2 buildout in 2000. These problem intersections occur during both the AM and PM peak hours at the following intersecdons. Sullivan Road and Spnague Avenue - 1995 Background - AM Peak Hour As shown in the identified tables, with the construcdon of the Sullivan Road Improvement Project, between Broadway Avenue and Sprague Avenue, this intersection is expected to operate with acceptable levels of service in 1995. 1995 Background - PM Peak Hour As shown in the identified tables, with the considerable level of existing and proposed development in place, this intersecdon will operate with an LOS of F, during the PM peak hour in 1995. The associated delay of 62.5 seconds, although beyond the acceptable limit of an LOS of D, includes the widening of Sullivan to seven-lanes on the southbound leg of this intersection. It is only expected that this level of delay will be extended over a period no longer that 10 to 15 minutes as this intersection experiences, significant peaks due to the commuting nature of the vehicles accessing this intersection. 2400 Background - AM Peak Hour As shown in the identified tables, with the construction of the Sullivan Road Improvement Project, between Broadway Avenue and Sprague Avenue, this intersection is expected to operate with acceptable levels of service in 2000. 2000 Background - PM Peak Hour As with the results from all of the background growth notsd in 1995, this intersection will continue remain at an LOS of F, with the delay decaying from 62.5 seconds in 1995 to 90.2 seconds in 2000. Although this level of service is high and is unacr.eptable, from the Spokane County, LOS policy, in actual experience, a minute and one-half of average delay at a high volume urbanized intersection, which this intersection will quickly become, is to be expected and would. not be considered excessive. If this intersection were to Inland Pacific Engineering Cornparry 36 Shellty I.akt 7Z! ' . cvntinue tv be aralyzed as a sub ilrhan intersecCion then significa.nt revisions wvuld be necessitated. It shouTd be noted, that the calculatians as shown in the appendix note that the southbound ieft tum with a future vaTume of nearly 400 left tunns could be revised to a dualleft turn, which cauld impruve the overalll level of servire of this intersection during the year 2IXW, PM Peak Hnur ta an LQS of E, with~ an aVerage delay of 55 seconds. i Sullivan Road arui 4tlt Avenue - 1995 Background - AM Peak Hour As shown in the identified tables, during the AM pea.k . hour, the level of service of this inter'jsection is expected to degrade from and existing LtlS of C, w*ith a reserve capacity of 201 passenger cars per hour (gcph) to an IAS of F, vvith a reserve capacity of -21 pcph. The pTicnary r~ason for this leve1 of service degradatian is th~ existang construction of aver 1500 apaatment units alang 4th Avenue east of Sullivan Rvad. Althaugh, apartmen4s, characteristicalLy, generate half the AM and Pdvl peac haur trips of single family residential, a cancentration of this type, will use up rather quickly the excess capacity of this intersectian as it is currently configuied. At this time and with campletion of the apartment camplexes, level of sen+ice of this intersectivn wall only cantirlue to degrade. The only remedy available at this intersectian rvould be~ to improve the intersectivn ta include a left tum pocket and signalue this intersectivn. If these roadway impmvements raere ta be perf'vrined, then the resuYting 1evet of service would be anjL(75 0f C (1$.6 secvnds). . I995 Bcrckgraund - PM Fe+wk Haur A: s showm in the ider~tified tab1~, during the P1V~ ~c hour this inter~tinr~ whict~ currently has a~ LC)5 of E, will degeale ta ar4 LOS of F, with a reserve C2paG1ty of -146 pCph. T1iS 5itliatioIt/ , 1 as described far the AM pea1c hour condition, is that with the additivn of the apartments alang 4Ch Avenue, this intersectian wil3 degaade beyand ft's capacity to handle the number of ears accessing the 4th Avenue vicinit}r, east of Sullivan Road. With signalia.ation the PM pealc hnur L[]S raould be D{29.b seconds}. 2000 Background -AM Peak Haur AS S}l[]WIl lIl the 1CIeII11fied tabIES' byr the year 2000, vyith anly backgmund valumes present, this intersectian rAntinues tv degrade and lvse reserve _ capacity frnm and LO5 of F, -21 pcph'to an LO5 of F, -80 pcph. An LOS of C (1$.$ secnnds) wouId be a,chieved if 5igraalized. 2000 Backgraund - PM P'eak Hour t~s shvwn in the identified tables, 6y the year 2000, with - vniy background volumes prewntf tWs mtersection continues to degrade and lase reserve caFacity frvm and IAS of F, -T46 pcph ta ati Y..OS of F, -192 pt;ph, An IAS of D(37.2 - seconds) would be achieved if signaliz!d. Sprague Avenue and C'anlrUn Rnad - 1995 Brickgrawrd - AM Peak Hour As shawn in the fdentified tables this intErsec#ian is expwtei ta vpeTate in the ffuture wath a r+ery acceptable Ievel of senvice. 1995 Backgmund - F'M Peak HQUr ; As shown in the identified tables this intecsectian is ~ . t„lana Paa;~~ Etwincenng r,o►~any ~ 37 sherrey r.ake TLs expeccted to operate in the future with a very acceptable level af senrice. - 2000 Backgrorerrd - AM Peak Hour As shown in the identified tables this intersectaan is ' expected ta operate in the future with a very acceptabLe level of service. 2000 Background - PM Peak Hour As shawn in the idenbified tahles this intersection is expected Lo operate in the fuhare with a very acoeptable level vf service. Suiiivgn Road and 16th Avenue - 1995 Buckground Peak Haur As shown in the identified tables, this intersection wW cvntinue to operate very nearly a.s it currentIy dnes, in that the eastbound leg, is responsible far the cvnflicting movemem and therefore, will not be affected by developrnent east vf Sullivan, (westbaund leg) vnly by increases in thrvugh traffic vcrlumes. 1995 Backgrvured - PM Peak Hour As shawn in the identifiei tables, this intersection will r,ontiriue to operate very nearly as it currently does, in that the eastbound Ieg, is responsible for the conflicring mQVement and therefare, will not te affected by develvpnnent east of Sullivan, (westbnuna leg) vnly by increases in thrvugh traf~ic vaiumes. 2003 Background - AM Peak Hour As shown in the identified tables, this insersectian wi1l cvntinue tcy operate Wery ne,arly as it cunently de►es, in that tlhe eastbeund leg, is responsible far the conrflicting movement and therefnre, will not'be af'fected by deveToprnent east af Sullivan, (westbound leg) vnly by increases in through traff c vo1umes. 2000 Backgrnurd -PM Peak Hour As shvwn in the identified tables, this rntersecdvn wi11 cuntinue W operate very nearly as it currently does, in that the eastbound leg, is responsible for the canflicting mvvement and therefore, will nvt be affected by deveTopment east vF Svllivarj, (westhound leg) only by increases in t.birvngh traffic vQlumes. Inlanrl Pacifi'c Engineering Camparry 38 5he1lry Lalce ITA / 1 rNino ;-co b~'4 187 ✓ Q 150 9 ~1 456 184~ o- 238 8 . 70 93 4 N ~ u +'j SPRAGUE AVE SPRAGUE AVE 0 cr a> Cl b l'j J z Y 23 ~ Q 332 D ~ s-~ o- 12 N Z 0 4S~ ~35 U ~ i A ~ tl~ FOURTH ~ ~hn 18 ~ ~ 87 8 ~p G~ 6 2 17 ou-J- p ao LL, U - H O ' 16TH ~ 0 cr- z Z J J ~ N i NOT TO SCALE ` INLAND PACIFIC a/ FIGURE 11 SHELLEY LAKE ~ 1995 AM PEAK HOUR SPOKANE, WASHINGTON FUTURE TRAFFIC VOLUMES ENGINEERING South 25 Altamont Spokane.Woshington ~uIULTIPLE SULWAN RD PROJECTS TRAFFIC IMPACT ANALYSIS + (509) 535-1410 99202 ~ ~ W(THOUT SHELLEY LAKE / \ / ~ 9O v~ a ~ 9 473 289 569 508 1 082 ~ C~.-p 936 294 0 i~ *f 27 SPf3AGUE AV£ SPRAGiJE AVE n O 17C z J11 54 ';k. 1 68 V ~ z 14 14 p 22 ~1 ~ 34 U ~4~ F(3L1RTH M &S~ ~34 9-=c;* ~ 6 10 L~ T U . ~ O 1fiTH ~ a ~ i ~ NOT TO SCALE ~ J ~ . V) .0/ # INL T AND PAV IFIC Figure 12 R ~ SHELLEY LAKE ~ 1995 P'N! P E~4K O~1 ~~~~lr ~~1ir~~~ SF~Of~CAI~E, WAS~#IPlGT~7N Fl1TURE TFtAFFIG IAQLUMES 5auth 25 A[tamont Spakone,Washingtan Mk]LTIPLE Sl]LLC4'AN RC1 PRDJEGTS. ~,~~~[C iMPACT A~IALY5IS ~ ~ (509) 535-44]0 99202 WIT~iQk]iT S~iELLEY L~4KE e ~ I ~ . ~vti~m 210.p 167 sv P ~ g 225--> 27e 462 {sa 83 109 ~ a ~N N + SPRAGUE AVE SPRAGUE AVE I o ~ -j z Z M2 ~ ~ 9 ~ C3- 12 ` p 35 zJ c~ FOURTH ~ n ~sa s „ _ ~1 ~ ~r' ~ ~ z V F O ~ 1sTH ~ a ~ NOT T4 SCALE ~ ~ ~ u~ J ~~LANn PACIFIC ~ ~ Figure 13 SMELL~EY LA~CE ~ 20~DO A~i~ P'EAK HO~JR sPOw~E, w,~sHINcrora ENG1~L.L~■ 1~T~j :~ERING FUTUFiE TRAFF'iC VOLL3MES 1 Scuth 25 Altomont 5pakanaXoshingtan MLfLT1PLE SULWAR! R❑ PROJECT (509) 535-1410 99202 ~ ~ 'WaTHQVT S~iELL~' LA~tE ~ TRAFFIC iMPACT ANALY515 ~ ~ ~0~ II t~~~ ~b~ 66fl-=C> 589 1230 -C:> <17- 1061 344 9 27 SPRAGUE AVE SPRAGUE AVE a n, z Z 54 166 Gh ~ ' z 14--> C- 14 8 25 3+ c~ FOUR7H ~ 34 s 10 3 ~ ~ r r~ - ~ o , 1fi7H ~ c~ ~ a Z ~ ~ a r~ . NDT TU SCAL~ ~ INL11NJ.J PAC1F1Ls 1 / FIGURE 14 ~"1 r SHELLEY LAKE ~ EN~I~T~E~~~1T~ 2000 PM P~K HouR SpD~NE. W~HINGTON FUTt1RE TRAFFEC VOLUME5 5outh 25 i41#omont Spvkpne.washin~tor~ A+lllLTIPLE SIJLLIVY~N RD PRDJECTS _ '(509) ~35-ti4t0 99202 W1TH(7UT SHELLE-Y I.AKE TRAFFIC IMPACT ANAL1'Sl5 - Shelley Lake Future Year Level of Service Alternative No. 1 To the Phase 1 and Phase 2(buildout) AM and PM background peak hour intersection volumes, the site generated traffic volumes as shown in Figures 7 and 8 were added and are shown in Figures 15, 16, 17 and 18. The resultant traffic volumes were then analyzed for future year LOS with the project. Tables 6, 7, 8 and 9 indicate the resulting levels of service from the traffic volumes generated by this alternadve. Alternative No. 1 Phase 1- Resulting Level of Service AM Peak Hour - As can be scen from Table 6, for Phase 1 completion this project dces not degrade the level of service, beyond the background LOS for any of the identified intersections ~ PM Peak Hour - As can be seen from Table 7, for Phase 1 completion this project will reduce the background level of service at the Sprague Avenue and Conklin Road intersecdon. The specific reduction in LOS is the reduction from an LOS of C, 236 pcph to an LOS of E, 88 pcph. Although this level of service, reduction from an LOS of C to an LOS of E, seems excessive, it is only associated with a northbound left turn volume change from 4 left turns without the project to 20 left turns with Phase 1 of the project. AJternative No. 1 Phase 2(Buildout) - Resulting Level of Service AM Peak Hour - As can be seen from Table 8, for Phase 2 completion this project will reduce the levels of service, beyond the background levels of service at two intersections. The first intersection is the unsignalized Sprague Avenue and Conklin Road intersecdon, where the 2000 background LOS of A(473 pcph) and the LOS with the project is anticipated to move to an LOS of D(145 pcph). Although significant in the fact that the overall reduction is three levels of service from an LOS of A to an LOS of D, this reduction in LOS, is still above the minimum acceptable LOS as identified by Spokane County. Inland Pocific Engincering Company 43 SJuIlty Lake TU TabZe 6- Fhase 1- AM Peak Hour Intersection Levels vf Service - Alternattoe Na. 1 ; - 1995 BACKGR[7UND ~C~,~,,, . 1~ W17fl,~RfbJEG~'~ UfrERSEMf)1V, , '~q~l►~'~ : ~ ' rtd.dized; ` i;,S' ,ired l.P ~etl ~ °~°~i ,>>y3 n t,.. ,/•y r i°7 Yii.+ I 1~AJ~ ` 1 4a,~ • I VC121~~'~ , ■11.~+~f•I '~A.~.7c Iki,~.:ttp I ~dA►J~ j l/E' ~ T PL i}Ii F~~ a lf: *tY~'t'u ~ sJ~~ I 5ullivan & Sprague I 34.6 I 0.52 I 1] I I I 34A I 0.68 ~ ❑ I I' 34.8 I 0.70 ~ D I I Sullivan and 4th I I I I 201 ~C ~ I I-21 ~ F I I I-24 I F Sprague & Conklin I I I ~ 463 IA ~I I ~ I 717 ~ A I I I I 447 I A Sullivan and lbth I I I, I 201 ~ C II I I ~ 44 ~ E 94 ~E Table 7 -Phase 1-PIVI Peak Hour Tntersection Leve1s nf Service - Alternetive Na. 1 ;~19J5 BACKGR TRAFFiIx~ " ~~t, v~,~, • • ~ ` ~ ~ • .T ''R~lF'F'IC,`~ f , ~.a w , , . , , U G'~ ~ ; , 195~5 WI7~+[? . ~ • ~ . , . . I , , r ~ . , ' . f , , , ~ {II , , , .ry ~ , r > ~r ~ ~ ~ ~ ;,,t~ . r~A 1~=.~~~,~ „ ~13'~~~~ i~r I ' 11 ~~i +'~'+r V~i161~~iC0'n~-h~C n~~"~.~ I' r r.r. y~V~~ ,•~~yy~ ' ~ " I C!~ t ~ ihf.7 II ' ~11Cb11 F*1c.,,9 ~s~~ . { V'1/ ~6l fE.AJ~.1 ~I~ M1 I~~.~ ' I r«~°~f lAC 7~ ; ~ I~Y{4~i•Yi~~ #..~c'4 k+~.'v 4~ I V~y'~~~ . ~ aui,ivan 8t Sprague ~ 39.7 ~ 0.39 D I II 62.3 1.02 ~ F 65.7 ~ 1.04 ~ k' ~ Sullivan and 41Yi I I ~ I 98 E ~I I ~-146 I F I' I -150 F 5prague & Cvnkklin I I ~ I 116 ~ D ll I ~236 I C ~ I 88 f E Sullivan snd 16th I I I I 152 ~ U S I E I ~ I 4 I E TnlQnd Pacirc EngirrrerERB Cn~ 44 Sheilcy Laka 7fii Table S - 'Pham 2 -AM Feak Hour intersediae Levels ~f Serv[ce - Aftemative Na. 1 ; , x Y~ ` t~ Ftf~ J Z* LA~IlR~1TJliD ~16. y t~ IIRN ~~6JtiL+l` ~{a . . +3C+.~/~~, + „',dt+ , , ~ ~ . ,~1~ % }`/4'a'~' , -U~'l'n ~'F~Y I ■1\+ ~ 'LAEa7 I l.A0' I ARJ.7 ~~11~ `■1:~ t~ ~ LAl~7~~~'4 ~p I 1vi ■ll~~ I, i.7 I Sullivan dt S,prague 1 34.6 I 4.52 I D I 36.0 I 0.78 I I7 41.6 I 0.89 I E Sullivan a,nd 4th ~ I I I 201 ~ E I I' I-80 ~ F ~ ~-1'~i2 ~ F 5prague dt Conklin 109 I I? 473 ~ A I I 145 I D Sullivan and 16th 1 ~ ~ I 48 I E 71 I E I ~ I 53 E TabTe 9- Phase 2 - FM Peak Nc►ur Intersection I.eveLs n#' Service - Afteraative No. I . , - + ; f. , . . , ,t.~ ~ ~ U, r-w'~.l ~ lll~ RQ~I1Na •?g' ~ ~~1Q~~.W~"pRd~ ` 5~~ . • `soxa'~ : r F.,. ~ RiMRSitt[3lV' ized rg'~Qalt~da ~ , ~ , , , , , . ws:~ t, ~ ~Los~ ~ ,Mia-Ys: N . •V~r,.,1* 1, 6p-~~ 1 ~ ~S _ ;~y ~~r~~c i1~~~;I. ~~~Sullirain & Sprague ~39.7 J 0.59 I Ly ~ I I9[].2 ! 1.12 I F ~ I 117.9 ~ 1.22 I F Suilivan and 4th 98 E -192 F -232 P I 1 I ~ I II I I ~ I 5prague dt Conklin 116 I 0 f I ~ 225 I C -35 ~ P Sullivan and lbth 152 I D k ~l I ~-13 I F -18 ~ F feelond Pacifrc Engineering Cayqm" 45 5helle+y Lrke TU The second intersectivn, to experience a reduction in L.OS is the Sullivan Rtiad and Sprague Avenue intersectiran. This intersection rsduces from amd LOrS of D, with an average delay of 36.0 seconds to an LAS of F]IE with an awerage delay of 41.6 seconds. Although the Lf]S D xevel is exceeded, asy increase of 5.6 seconds of Wsal delay, is somewhat arhitrary due to the somewhat subjective nature of signaliT,eci intersectian leVel of w"ice r.alculatians. Usually, the rule of thumb wvuld state, t}lat wlth 11'l1UIE aggI'e551Ve 51gnaY ttm1I1g, by incorpora[ing shorter cycle Tengths, incorporating mare right turn vn red mr left turn permitterifprotaected phasing a 10 to 25 peroent reducfivn in delay can be achieved. in ord'er ta rnaintain cvntanuity tetween level of servace caaeulaaans for review, these timing revisi4ns were not incorpvrated, Therefore, ari average delay change from 36 tv 41.6 seconds could be oonsidereci to be very little change, if any at all. Additionally, the primary reason for the increase ui LC?S is due w the averal2 increase in traffic Volurnes at this irytersection and the reduetion in green time for the eastbound and westbvund directions given t}ae lazger through valumes alvng Sullidan AVenue. nerefore, if there were more thmugh lanes auarlable for through traffic prvgressivn ar nartribound left tums ttae o►+era91 intersectian Yevel of service could be rnaintained within the acceptable limits of no less than an LO5 of D. PM FeaIc Hour - As c.an be se,en from TabTe g, far Phase 2(buildout) this project will reduce the Sullivan and Sprague and the Sgrague and Coriklin uttersections be1aw the le►+els of service from the baekgrvund growth in traff~c. As wath the earlier discussaans, the levels of servic.e seductions on 5prague Awenue are nvt re3uctions an 5prague Ar+enue, rather they are the result of additional through volumes vn Sprague Avenue and this thrvugh traffics imgact an the intersecting side streets. The irnpact tv • the intersecting side streets is usuaTly in either ihe nvrtlhbvund or svuthbvund unsignalized left turn. As indiCated fvr Phase 1 campletion, the increase in bath thraugh traffic on Sprague and an increase of 161eft turns reduceci the reserve r„apacity by 150 vehicles. 'I'he same is true for the Ptsase 2 completivn, where the increase in northbaund 1eft tums fro:n a pre-deVelaped altemaEive volume of 4is to a deaelvpei buildout volume of 6$ leR tums. It shvul+d be aatetl that this wolurne is apprvximately half that of the left tums in the AM peak haur. Hawever, the higher eastbound cornmuting volumeson Sprague and the can#lict that they present, fvrces Xhis interseetion ta an ivC]S of F. At the 5ullivan Road and Sprague Avenue infiersection, the reduction in level of service create[1 by this intersection is two fv1d. Fixst, the increase in throvgh voluFnes d'ue ta cansiderahle backgrvund grawth, comhined with an increase in left tum Vvlurr►es fvr access tv the proposad Freci Meyer facility, haVe pushed this intersectian beyvnd ic's capacity tv serve the expecte.d gravvTh. By the year 2000, with a background 1eveI of senrice at an LQS of E(30.2 seconds), the additianal delay and level of service reductiQn cv an LOS of F (117.7 sec:ands) is the result of the svuthbound ta eastbound left tum being teyand capacity with nv additimnal green tiane available to rmprvve this level of service. In the event that the caunty were to construct dual r~and Pacific Engi,~ering empeny 46 sherrey r.ake TM ~ lefts at this inrersection as part af Ithe Sullivan Rvad imprvvement p~ ro'ect, 1t3S a¢ this intersectian wiR increase ta an L+aS vf E wmth an average delay af 55 seccmds. ~ . i I Jnlaiuf Pacif c Enginearing Cantpany 47 S1utlcy Lake TM 154 198-> r~ 239 451 456 73 83 29 yp ~ G7 N ~ . Ca # m ' ~ SPRAGuE AvE SPRAGU~ AVE I ° ~ z 332 ~ z s ~ ~ 12 p 4 f 35 0 wco w~ ~ FOu RTH ~ r• 18 ~ ~ 68 1s ~ „ o ~ - ~ . ~ 0 ~ , srH ~ ~ ~ I ~ ~ ~ ~ - NOT TO SCALE ~ • INLA,M D PAL.+~~IC FiGURE 15 ~ SHELLL-Y LA1CE ~ T ENGINEERING Iy.`.] AM SPf]KANE. WA5H1NGTdN Scuth 25 AEtflrnant 5pakana.Washingtnn AllLT1PLE FUTIJR£ 5iJL1 N 7RAFAFl~!C R~ PRt3.1 VOLUMES ~CYS _ (5i15) s35-141a 99202 Of ~ WiTH SFfEUE.Y Lf4#t~ / TRAFFBC iMPACT AIVALYSfS ~ ~ 4 73 302 082 938 511 273~ ~ 295 38 U39 ~ f7i A~] ~ sPRRAcuE AvE sPRAcue nVE ~ ~ a ~ ~ D 55 168 W z 14 14 v ~ 22 3s c) V y ~ I FOURTH I 34 I 9 $ ;i ~ ~ U ti Q ~ i s7H e ~ z < NQT TO SCALE ~ J ~ [!7 ~ INLA.l,V ~ PAC1F=1C' ~ FfGURE 16 SHELLEY LAKE ~ ~~urT~~~~~~'r 1995 PM '~EAFC HOI~R SPawvvE. wAsHIn~cTor~ FLlTl1RE TRI+FFlC 'JOLUMES 5outh 25 Altomant SpokoneXashington MULTIPLE SIILlsNAN ROAD TRAFFiC IMF'ACfi ~tNRLYSIS (5~39) 535-1410 99z~12 ~~PRC).1EC75 WfTH SHELLEY LA14~~ f arcre~~ar 210 ~ ~ 223 20 ~ ~ 9 241 ~ 288 465 v--- 464 89 117 20 SPRML7UL AVE JPrAP'IL1UL AVE ~ CD ~ N ~ Rml ~ 4p 1-i~ J ~ 25 c:P ~ 342 t~n z 10 -7 CTa 13 O U . 5 *35 m ,p c~ir FoURTH us 18~~~~~88 8 2 17 r p p ~ Q f Z C.] , ~ C] 1 F1TF{ ~ , o ~ s z i ~ E ; NOT TO SCALE ` J + 1,NLAND PACIFIC FlG1JRE 17 1 r SHEL.LEI'' LAKE ~~'~~~~r~~~~'~ 2DO[} AM PE~4K MOUR sPo~uwE, w~r~iNCTvN FUTJRE TRAF F1C VdLUNlES 5oorth 25 Altamont Spakane,Wa$hingtrsn 1V~ULTlP1.E 5LlLLNAI+I RD PRQJECTS s.(509) 535-141 ❑ 89~02 INCTH SHELLEY LAKE ~`TRAFFIG fMPAC7 WVALY515 / . 354 58 ~ ~Q 8 I 5t3 680 afl 4.- 599 1232 1066 42 ~ 353 13J ~ 325 ~ ~ ~ ~ a44~ ~ w °c I SPRAGUE AVE SPRAGUE AVE r ~ z ia `r n Q Z cr J 57 ~ ~ 175 D Y N Z 15-0 .0-14 O 25 ~ f 34 U m o ~ I FOURTH - ~ ~ I ~om • 65~ ~52 I 9 jJ ~ 6 10 czkr 4 ~ I N~~ O U H O ~ 16TM ~ 0 ~ I Z Z J J I N i NOT TO SCALE ~ • ~ - i INLAND PACIFIC FIGURE 18 SHELLEY LAKE ~ ENGINEERING 2000 PM P~K HOUR SPO~E, WASHIN6TON I FUTURE TRAFFIC VOLUMES South 25 Altamont Spokane,Washington MULTIPLE SULWAN ROAD TRqFFIC IMPACT ANALYSIS ` (509) 535-1410 99202 ~~ROJECTS WITH SHELLEY LAKE/ \ ~ Shelley Luke Future Year Level a,f Service _ AUernatave 1Vo. 2 Ta the Pha.se 1 and Phase 2(buildout) AM and FM background peak hour intersection Volurnes, ' the site generated traf~~c r+olumes as shown in Figures 9 and 10 were addad and are shvwn in Figures 19, 20, 21 and 22. The re5ultant traf~~c rrolurrnes were then analyzed for future year LOS with the prvject. Tab1es 10, 11, 12 and 13 indicate the resulting levels of service frvm the traffic volumes generatad by th3 s altemati►+e. Alternative No, 2 Phase I - Resulting Level of Service AN! Peak Hvur - As can be seen fram Table la, for Phase I cvmpletivn of this alternatiae wi1l only affect the reserve capacity of the 5uBivan Road and 4th Avenue intersection hut will not degrad'e the level of service, beyond tlhe backgraund L()S fvr any vf the identified intersections, including the Sullirran and 4th imtersection. PM Peak Hour - As can be seen fram Table 11, for Phase I cvmpletian of tlais alternative wil1 only affect the reserWe capacity vf the Sv1liVan Road and 4th AVenue intersection but will nvt degracte the level of servace, beyvnd the backgrvund I.QS for any of the idenrif~ed antersectivras, including the Sullivan and 4th interseetivn. Alternalive No. 2 Phase 2 (Bur`1dvul) - ResuTting Levei aj Service ` " Peak Haur - As can be seen frmrn Table 12, fnr Phase 2compPetian af this altematiVe will only affecC the reserve capacity Qf the Sullivan Rvad and 4th Avenue intersection but wi.ll n(aC degrade the leveI of serwice, beyond the backgr€sund I.US for any of the identified intersections, including the 5u1lirran and 4th intersectivn. PM Peak Hour - As can be seen from 'I'abTe 13, fvr Phase 2 completion of this alternative will anly affect the reserve capacity vf the Sulliaan Raad and 4th Avenue intersection but will not degrade the ler+e1 af service„ teyond the background LQ5 for any of the identified intersectivns, including the Sulliaan and 4th interseccian. . Inland Pacifie Engrnaering C.rsnparry 52 S3redley T,Qke TU Tsb1e 14 -Pham 1-AM Peak Hour Intersectivn Uvels vf Service - Afternative No. 2 199S'8A~CR[~R+T.I[I'ND ~e~ 1~J5,W~"C~ ~'Ri)~ ie ~ , , } f . ~ , ` ' ,~a- ~ ' , ' , ~ i~~~,y ~T`, i S~~ b LJ~~IFJGCE{ b~~.~l~~ ~ V~iCV mliy Los I ~cap. » I ` LUS ~ 'netay WiG - I " i~s ~ ~p. , ~5 ~ ~~ai r WIC C.~;~ [~rs Sullivan & Sprague ~ 34.6 ~ U.32 ~ D 34.0 ~0.68 I D I I 34.0 I 0.68 ~ D Sullivan and 41h ~ I I I 201 I C I I ~ I-21 F ~ ~-143 I F Sgrague St Cvnlclia l I ~ I 463 IA 717 A I I I40D I It Sullivan and 16th ~201 I C 1 I 1 44 63 ~ E Table 11 -Phase T- PM Peak Haur Intersecteon I.+evels of Serviee =Afternative Na. 2 E3CIS-1'ING : ;s~ ' <r ~ «1 ~ « f.,~~z~ . , v1~l5 B~ICKGR~C1tJlsrb:~C, . I A ~995 t►~i'~'~ ~tflfi~£C'1`~'CRA~(~,'. ~ ' • , ,~~t`A • Y~~~+~.,, c, . . ~ Xf ~7~ :•5~~.~ r ~w. 'S.,~ ~j ~d V~~~~a" , 1"' VF\J ~ Wi7 K ~F%1 rAs DO"] i Iq FLOS r l.Lp ~ l~l1l~.l FDCbyL VI C~ s ~47 I Y~ I L R./ ~ ~ Sullivan & 5paague I 39.7 I 0.59 I T] 62.5 I 1.02 ~ F ~ I 63.7 ~ 1.02 I F ~ I Sullivan snd 4tb ~ I 4 I 98 I E I' I -]4b F ~ I -188 I F Spragiis & CvWdin ~ I I 118 I ❑ 236 C I 237 I C Sullivan and 16th I I ~ I 152 I L7 ~ I I 5 ~ E S I IE . Inl'and Faofrc Eng+ireering CmVary 53 She[1'cy l,ake TI.JI Table 12 -Phase 2 - AM Peak Haur Intersection Leve1s of 5ervice - Altemative Nv. 2 ~ 1~S~V'G , ` . ~i BACtC~M~CIUUN~f ~C, ?.dIXl,~ ~~t)~G'T.v~C~, , W Y~ y} y► ~k .~S~'p~ . 4• ~ ~:a '4 ',.~~'#t ~r Lc V~f~11~1~i `~~lii9 mlay; ~v& Los ~ 6p Las way ~ v1c ~ Lris c"` Los ~ em, v►ic= i.os; ,CAP"~ I ~ ~osry, Sullivan & Sprague ~ 34.6 0,52 I D ~ 36.0 I 0.78 I D 1 I 35.4 ~ 0.79 I I) I Sullivan 4th l201 c I I I I-8o ~ F I I I.416 ~ F Spraguc & Gvnklin I I 463 A I' I I I 473 f A I I' I 342 I $ 5ullivsm and 16th 4 . I 201 I C ~I I I I 71 ~ E I ~ I 33 4 E T'able 13 - Ptrase 2- P'M Peak Aour Intersectian LeveLs af Service - A~ernative No. 2 ,AC,~tGlt~[t►~v~1,'~7tA'F'ICS'k, I ~~2Vili! ~ tR►~~y~~ 2~U S \ ~ SISF~[."~O1V ` > ~[~ed < I 'Umb"ai'nd Uwftvwlized , , ; • N{ :n; ~~A, Dew I-.-rVICt l..x.iGS I ; Cap I L[?S I belay rVIC ~ ~L(}5, I C$p 1]eloy 1 : ,'V1Cy I s ~p.-k~: ~S , Sullivan & Spraglue ~ 34.7 I 0.59 ~ D I I 90.2 ~ 1.12 I F ~ I I 103.4 I 1.18 ~ F I ~ Sullivan and 4th 98 I E ~-192 I F I I I I-322 ~ F Sprague & Cvnklin 115 I D ~ I 225 I C I I 227 I C Sullivan and 16th 152 ~ ❑ I' I I-13 ~ F I I -13 I F fnlanut Pacifec Engineerin8 CompanY 54 5hellry !ake T7A ~ 1 ~m~ 58~~~~~ 8 1 B7 ~ 5~ 452 ~9 ~ 46C~ 19+~ ~ 23~ • 7~~, ~97 3 ~~~~8 ~ (A N # ~ V ~ ~1{] 5PR4GUE AVE SARAGUE AVE r ~ lTC ~ 2 z~ ~ ~ ~ c~n ~ t ~7 d~ C~ ] 2 ~ 4 ~ 3g U ~ ~ ~ ~ m ."~i ~~u~rH ~~b 9G~ ~BT 8~ ~ G 2 ~1 ~ 17 K7~ ~ ~ ~ ~ ~ ~ ~ Q _ Z U • ~ O 3 6T~! ~ a ~ ~ ¢ z ~ ~ ~ ~ cn '~~lT T{] SCAf~E ~ f ~ I~'LAN~ P~~I~T~ t~ F,~~R~ r ~~E 1 E1~{~~II~~~~~I1~~ i 995 AN~ P~~ r~auR w~~:~~~~~ F'~TIJR~ Tf~IFF1C VOL~7MES 5outh ~5 Wtamont 5pvkane,Woahington ~~~~IPL.~ SULLIVA1~l Rb P~D~IE(:TS ~'S~9} 53.5-9~10 S92a2 ~ W1TH SHELLEY IAKE AL~fERNf4TN~ ~~~F[C 1MPA~7 ANALYSI~ ~ C ~ ~ nr4in ~v~ 4p 1-> I 473 J" 289 =6 589~r ~ ~8 1t~4~ 4~ g~ 277 296 ~7 ~ SPRAGUE AWE F sPRAGUE AVE ° Q ~ I ~ s~~ ~104 ,5 -4> ~ 14 22 35 1 Fou RTH ~ 4 .34 J I 10 ~ ~ g ~ - ~ 0 . ~ 16TH ~ 0 ~ z ~ ~ ~ ~ ~ ~ - NOr To sCALE + ZNLAND P A~~~~~ i C FIGURE 20 / SHELIEIf LAKE 1 1 ~ ~.~~vT~ ~ 5PO1~E. 1NA5Hl ~IGTDN F1pTURE TRAFFIC VpLUMES 5outh 25 Wtamvnt 5pokane,Washington MULT1Pl.E SULLNA1+C RD PRUJECTS (509) 535-1410 99282 ~VrTH 5HELLE11' LA'KE ALTERNATN51 ~TftAFFiC IMPACT ANALYSlS ~ C ~ l 310 lp ~167 3 214-=> C3z- 278 525~ ~ ~3$ 126 3 $ ~ N y W N N W ~ W ~ ~PRAcuE AWE sPRAGvE A►rE z z 23 J' ~ 420 ~ 12~ ~13 ~ ~ 5 37 U ao r I FalJ RTH I N 1[i ~ N 16 J, ~ 67 6 I 2 17 c;~ Q 2 U i ~ 0 ti 6TH ~ L7 [1G ~ z ~ J J [f1 ~ I NOT TD 5CALE I'~7~.t~D PACIFTC ; r FIGURE 21 S~iELL~' LAKE ~ I~ 1 2000 AM PEAK HUI.JR ~~~.T~1~1 ~~~l~LT SPDKANE. Y~'ASHINGTD'~ FUTURE TRAFFlC VOLUMES I South 25 Aftamont Spokene,Washington _ MULTfPLE Sl7LLNAN RD ~ROJEC - {5r~9} 535-ia1+~ 99202 ~~W1TH SHE~' LAKE ALTERNA7iV~ ~ TRAFFlC IMPACT ANALYSlS ~ aaom 303 u ssa~ ~ 5e9 ~ 235-C> 147 3629 2' hp7CAN #N~+ 07 ~ O I ~ SPRAGUE A11E 5PR4GUE AV£ ' ~ ~ ~ ~ P z 239 G=a a ~ 17 16 Q 25 v ~ 39 ~ <-tt46 p ~ FOuRrK ~ 65 34 9~ ~ s C) _ ~ ~4 0 16TH ~ O . ~ E .?E Nar TO seALE =1 . D U) ~ . r~NLAJ..D PACIFIC t~, Fi,u~e 22 ~ S~lELi~~' LAKE ~~►T'GI11T~E~~~~,G ~U0o PM P~ SPo~E, W~HINGTa~ FLTTURE TRAMC VLILL9MES Sotrth 25 Altamors# 5pa'kone.Washingtvn MCiLTIPLE SULLfVAN RD PROJEC75 ` (509) &35-1410 99202 J<H SHELLEY LAKE ALTERrlRTN~ ~TRAFF1C IMPACT ANAALYSI5 SHELLEY LAKE PVTURE pENELOPMENT INIPACTS ALTERNATIYE aVO. I Phase 1 - 1995 Hased upvn the analysis perfvrmed for this altemative for the proposed Shelley Lake develaprnemt, nv direct specific impact, which rvould degrade the Phase 1, 1995, backgraund level of service of the surrvurading street system can be determined. VVith the exceptivn of the Sprague Avenue and Can'klin Road intersection d'uryng the PM peak hvur. Hvwever, an canjunctivn wath the expected growth levels associatgd vvith this locativn vviffiin Spakane Caunty, this intersectiot~ does nat drop bel[a►v the minimum acceptable LC}S of E, during the kM pealc haur, fvr an unsignalized intersectian within Spokane Cvunty. ALTERNA.~TlVE Nf3. I Phase 1- 2000 " Peak Hour - Sased ugon the analysis as perfarmed for this altemative of the proposed Shelley Lake development far the future year buildout of 2004, seaeral intersections dmp belaw the background levels of seruice, while vne of these intersectivns drap below the minimurri threshvld as vutlined by SpoTcane County. I]uring the AM geak huur, the two intersections which drvp below the background levels of service are the Sullivan and Sprague and the 5prague and ConTclin intersectians. The SuIliVan and Sprague intersection, hvwever, falls be1Qw the minimum aeceptable leVel of servir.e for this intersectivn. As described earlier, the change in LOS is from an IAS of I3 (36.0 secahds) to and LQS of E(41.6 secvnds). Although, the change carries the intersectian thraugh the LO5 of pJE threshold, several timing revisions cauld be inr.orporated to minimize or negate the impacts. The real rneasure of th,is sign~ized intersections capabilities tv haaidle the added tra.ffic vvlumes fram this alcemative is that the vlc ratia mayes frvm a background vlc rativ of 0.78 to awith the altemative vfc ratian of 0.89. Therefore, this iratersection maint.ains adequate capacity ta handle the volumes generated by this propvsed prvject as well as the background grrawth/ bLiC the signal taming and exi5ting lane canrgurations do not a11aw the intersection tv operate at itys mauimum potential. PM Feak Hour -&ased upon the analysis as perfQrmed for this alter-r►ative of the prvposed 5heuey I.ake develapment, far the future year buildout of 2004, only ane intersection draps belvw the background lev+els of service. T'his i.ntersection is the Sprague and Co,nklin untersectivn, and in additivn tQ dropping belvw the hackground lewel of service, it also drvps beLvw 5pokane Caunty's minirnurn acceptable le►+el of service. For an unsignalized irstersectivn the minirnum acceptahle level of service is arr LOS of E. At this lacatavn the resulting level of service far this altemative is an IAS of F, with a reserve eapacity of -35. As nvted earlier, this is due t4 t}►e increase of 64 additianaT northbound tv westbvund 1eft tums from Cvnklin omto . Sprague. It shauld be nvted that a rectuctivn in inCersection reserve capacity is being reduced by fvur tiines the number of addei left tums. This type of capacity reductivn is indicative of increased through traffic vvlumes vn the intersecting street, in this case Sprague Avenue. lrrla►td Pacifec Engineesing Gomparry 59 Shellcy Leke 77rl , ! ALTERNATI'VE NO. Z Pha.re I -1A9S BasOd upvn the STlaTy515 perfvrmed fvr this alternative for the proposed Sheiley I.ake deVeiopment, no direct specific impact, which wauld degrade the Phase T, 1995, backgrvund level of seerrrice of rhe surrounding street system can be deterniined. The on1y significant change is nvt in leVel of serWice, rather concerns the degree of impact. As shvwn in Ta'ble 10, the AIVf geak hcrur mserve r,apacity of the SAvan and 4th inEersection, dec.reases from an LCIS of F 21) ta an LU5 of F (-P43). What ~is sigrufies is that, due tv zncreases of ttmugh traffic vvIumes atong Sulliyan Itvad any increase in traffic tto the adja.cent side strftts will nvticeably reduee the ar+ailable gaps to greater degree than the specifnc number of r.ars added. An exa.mple of this was discussed fvr Alternative No. 1, where 541eft tums were intrvduoW and the reserve capaciry was reduced by a 4:1 ratio. During the F'M peak hour thas same intersection decreases from a background La5 of E(-t46) t6 an LC]S of E (-188), the reasoning for this is the samme as desci-ibed far the AM peak hvur. ALTERNAT7VE NC?. 1 ' Phase 2 - 200[] The imgacts for this altematiVe are similar to tIhose described above for Phase 1, vnly that the degree of severity is camplicated by devel4pment fuNher south of 4ttt Avenue, and nvt necess,arily the develvpments along 4th Avenue. However, the tuming volumes onto 4th from 5ullivan aze signif cant and would force this i.niersection tv nat vnly meet several rvaarants Far signalizadon by year 20[]0, but .ivauld lalso result in significant intersection imprvvements such as left tum lanes and interssctian signgitation. - ALTERNAT7VE N[3. 3 Nv impacts to the future transportation syscem other than from background grawth cauld te attributed tv this project site. ~ ~ ~ 1 ~ In1und f'adfic En,gintcnng ampary 60 Sheiley Lake T1A ~ ~ P(3TLIVTIAL MI77GA77ON Patenaa] mitigation was in.+estigate,d by altematiWe far those identifed intersections affected by . the prvpmsed d~.weluprnent of the Sheiley Y.alce prvjact. This investigatinn evaluated the existin,g WS, the future background LOS and the future I.C]5 with the pmject, by incersectirrn wittr recammendativns as fvllow. ALrERvA77VE Nv. x SuiUvan Raad and Spmgue Avenue -Based upc3n the existing, future baclcgraund and future Phase 1 as well as future Phase 2(tauildout), this intersectivn, will cantinue ta operate beyand the minimum a.ccegtable levels of senrice fvr a signalized intersectivn as identiied by Spokkane Gounty. At this time, there is very litde mYtigativn that could be recommended except that t.his project could participate in t,he deVelvpment of the future duai lefc turns which wi11 be req,uired on bath of the northbound and southbound legs of the intersectian. However, due to the location of this grojecx, garticipation wvuld rrnly be limited tv the percent traffic participativn fvr the southbnund (PM peak hour) dua] teft turn lane. Based upvn existing and future volumes, and depending upvn construction, this develvprnent cauld participateby cnntributing, ($4f544) 15.8- gercent of the totaT cost of vnly the southbciund dual left, in the year 2000. Please nQt,e that this is nvt the percent participation i,n the entire intersectian impraventents, only the percent partiCIpatlOfl lIl t]e CASC of t]e dLlal left 'l'um l8i1e. It shQUld bee recommended Ehax the face of this plat 'te cvnditianad sa that in the event that Spakane Caunty were ta form an RID, that partieigativn in this improwement wQUld be mancfatory. SuUivan Raud and 4th A°venue - Based upan existirag, future background, fufiure Phase 1a5 well as future Phase 2 (buildaut), this intersectian wii1 csntinue tcr ogerate belaw the mnirkimum threshvlds of levei of service as identified by the Spokane Caunty• HvweVer, this altemative specificaUy, re-aligns the prvposecS 4th Avenue and Conklin Rvad intersection to allow fihe tlyrough fraffic, with a home based-wvrk orientativn to access Sprague Avenue rather than to allow travel dawn 4th Avenue tv Sn11ivan Road. Therefvre, rinitigation as prvpased by thYs alt.ernative is ta aullvw for the realignrnent and reconfguration of the 4th Avenue and Conklin Road ilnt,erssction, and nat prvvide far arfy improVem+ent whether physical ar Via plat notation fnr any future canstruction of the 4th Avenue and SuUivan Road intersection. 5pmgue Avenue and CankUn Road - Basad upon ecisting, future background, future Phase 1 as vve1l a.s future Phase 2(buildvut), this inr.erse.ction will cantinue ta aperat,e within the minimum thresholds of level of servic,e as identified by the Spvkane Gaunty. It is rwognized that after fiature bui7dvut, this intersection will be aperating with leVels of service in the LC]S DIE range. Hawever, as has been nvted the reduction in 1eVe1 of service by year 2000 t,o an LOS of F(-3S) is due more w cvntirsuect develvpment and traffic grbwth along Sprague Arrenue than with the development of this altematiwe. Parc of the decreased leael of service at this i.ntersectivn 1as been in response to the poor levels of service, and no cagaciky available at the lnlurrd Fanfic -Engtntering Campany 61 Shelley Lrrke TL4 Sulli►wan Rnad and 4th Avenue inter=tifln. Due ta the realignment af the 4th and Conklin intersection a11 altemative traffic is encourage to use this intersection. At this time and with the future level vf senvice at an Lm5 af FJF, the mirigation at this intersection should imvTve the reanalysis af this intersectran griar to full plat buildavt for the patential installativn af a signal. Due tca the tratfic valumes present, and 4he nature of Cvnklin Rnad both north and south vf Sprague, the vnly inLersectaon modific,ativns wautd be the installatian vf a trafFic signal and detection equapment. '3'his signal, would neei ta te vgerateci in the split phase moide for Cvnkliin, and the perntittted protectel phase fvr Sprague. In the event that this signal is warranted, an RID should be fvnrnel by the cannty, via an RII3 statement on the plat far pacbicipatian in these improvements,l Due to the natuTe vf this alternatiae, the plat should contribute 100-gercent vf the cost a~l the traffic signal canstructian. Additivnal, intersectinn imFrvvements, wautd need to be dist~ihuted amQng vther R~ pa~rtici,~ts. Sullivan I2aad and 16th Avenue -Based upon existing, future backgrvund, future Phase 1 as well as future P'hase 2 (huildout), this intersectian will continue to rrperate within the minimum thresholds aF level vf service as identified by the 5pokane County. Therefvre, nv pertential rnifigation is recommended at this tim`e. ~ ALTERN.4T!'VE NO. 2 SuNvan Road and Sprrrguc Avenue lBased upvn the existing, future backgraund and future - Phase 1 as well as future Phhansse 2(b Wdvut), this intersectaan, will cvatinue ta operate during the AM pmk hour within the minimuin acceptable levels of service fvr a signalized intersoctian as identif ed by Sgviane Gounty. Puring the PM pe,ak hour this interse.ction for future baclcgrvund as weY1 as future wit14 the project wiil operate below the acceptable levels vf servioe far this intersection. For this altemative, it is expected that a11 veriicles associated with this prv}ect will be through vehicles at this interswtion. In the event that Sgvkane Cvuntp were to revise this inters+ecdvn by prvviding additional thrvugh lanes, it wnuld be recommended that this pfv}ect participate ta the percent level of respvnsihility due ta the valume vf trips. Based upan this participation, this altemadve shauld participated iri the cnst of any additivnal sauthbound through lanes beyQnd thase existing iri year 2000, by providing (149115$3) 9.4 percent of the cvst far these lanes. Flease nate, that t:his is nat the part.icipation rwommendatian for the entire intessectavn improvernent, ernly the sauthbound chrough lazies. Sullivun Rnad and dth Avenue -Based upnn existing; future backgraund, future Phase 1 as weU as future Phase 2(buildvut), this intersection will continue ta aperate below the minimum t~resholds af ler+el of servir,e as idenafied by Spokane Cvunty. Due to the configuratiorr vf this altemative, Rvtchford Drive wvuld t,e extended stiaight through tv 4th Avenue. Fvr ttais alternaUve, analysis was pravided that plit the traffic Feaving the praject site, based upan traveD bme and speed. This analysis, indicated that 4th Avenue tca 5ullivan Road wvuld be the quickest way tv reach the Sullivan and Spragufe intersection. I'his is primarily due tv aright tum at I , , Intand Pacific Engi+rcenng Canwuny 62 S1euey LoTce TlA ~ ~ 5ulli►ran and 4th aersus a left turn at Conklin and Sprague. If this altemative is chvsen, it would be the recommended mitigation that this plat 9fe recanfigured tm the point of the ross af add'mtivnal 1vts, to realign the Cortklin RoadfRatchfatd 17rive and 4th Avenue intersection. AdditiQnal mitigaaan beyvnd this wvuld be that recommended above fvr AlternatiVe No. 1, a# the Sprague A►+enue and Conklim ltvad intersectinn. Sprag,ue Avenue and Cunlelin Ti'oal - Based upon existing, future baclcground, futrare PhaSe 1 as well as future Phase 2 (buildout), th.is intersectivn vs+ill cvntinue bv oper'ate within the minimum thresholds of level of sernice as identified by the Spokane Caunty. Therefore, na potential mid,gativn is recommended at this ticne. 5uiUvan Road and 16th Avenue - Based upcrn existing, future backgraund, future P'hase 1 as well a.s future Phase S(buildvut), this intersectivn wiU continue to operate within the minimum thseshoTds gf leVet vf serviee as identified by the Spakane Caunty. Therefvre, na patential mitigati4n is recommended at this griae. ALTERNATlYE 1VO. 3 Nv rn.itigatipn would be required far the Nv Build altemative. Inlarfd P'acific Engirieerin8 CmWurr1' 63 Shellry Lake TM CLiNCLUSIONS ANI1 RECOMMENDATIOIVS CUNCLUSIONS - Akernative Np. I Based upvn the analysis, field observatians, assumptions, methodolugies and resulks which are pTovided in the body of this dvcument it is cancluded that for A1tematiVe Na. 1, develapment of Fhase 1 of the Shelley Lake project can be implemenfied without having asignifieant impact ta the vverall area twsportatiun sysfem. Additionally, subsequent phases of completivn rnay haVe nv affect ta the transporsation systems within the immediate auea depending upan any planned vr prvgoset transportatian systenn imprvvements. The following are conclusiflns reached and documentel withiit this dveument: • By 1995 with background volumes present all study area intersectians wW vperate withirl acceptable Ie►+els of service; SulliVan and Sprague [LC}S D), SulliVan and 4th ( LOS E), Sprague and Cvnklin (L{]S C) and Sulliuan and 16th {I.C7S E}. Althaugh these intersectivns are cutrently on the margins, there is capaCity for additivnal westbound and nvrchbound mvvements. ■ 5hvuld the uveaaLi development and gravwrh of the area be maintained at nearly 3.0 percent, twa of these interseefion are expected to fail pnvr to development of this groject, they are Sullivan and 4th (LOS F) and SuWvan and 1 f th (LO5 F). This is due to westbound to northlound 1efCs and higher thrvugh vvTumes. • After the full develapment of the 58 single farrlily units, at the completion of Phase Y, all study intersecti4ns are expected to remain at the same backgraund level of service as prajected. This does nvt mean that this deVelvpment wrU nat add asiditimnal Vehicles to the firansportation system, only, that the far 1995 have the LflS capacity fvr &he increase in background traffic and the development of the Phase 1. • That with the completian of full buildout of Phase 2, by 2000, several interser-tions will need improvements ta ailvvv the ►+olume of antacipate+d trafffic to pass at reasonable levels of service; 5ullivan a,nd Sprague, due to the design of the ;plat direcdng tdgs ttr Sprague via Conklin, durirsg the PM peak hour (tiy adding $0 - 90 ieft turns fram this prajecC, added ta the 1995 expected 420 existirig PM peak hour left turns} will push tttis intersection beyond it's capacity ta serve Teft turns. It should be nated that the as a nale of thumb, for either right turning vr Ieft trarnirsg vehicles, the threshold as identi~ied for a separate lane is 400 Vehicles per hvur. Additionally, the Sprague and Canklin intersection during the PM peak hour will drop to an LC7S of FJF, with LOS E, being the rrunimum standard fvr an unsignalized intersectivn. Therefore, it has been racamanended that in the er+ent that either the AM vr PM northbouna to wesibvund left tarns begin to experience excessive delays, a traffc signal shauld'be insta,11e1, hawever, at least fvur warrants fvr such signaliaation shvuld tie met. 1nland Pecririfrc EngineGring Company 64 She11ey Lake TZA , iAt this time, and by utilizing the growth rates far the averall area, ic is unclear as to whether the development of AlternatiVe NQ. 1 wauld require the improrrements recammended due ta it's development alvne. As was proven, tt~dat with vther azea developments these nanprnvements are recommended and required irt svme instaatces tv allow thrflugh traffic pro,gressivn. Please refer ta the recommended mitigation sec€icari of xhis document for mvre detaiL REcoMMENDA77aNS - Alrer=Uve; No. r : ; Althaugh the addition of 58 single fanuIly hames in Phase 1, and assvciated traffic wili contribute to the existing traf'fic currently using the Sullivan Road and Sprague Avenrae carridvrs, the Qnly izr3pact will be that towarrds ths cumulative avesage daily trafFc vvlumes. Hased upan the analysis prmnted, as required by Spokarie County, the pmpased development under this alterna~r~e nf the Shelley Lake Plat v►~ili not have any sigsuficant impact ta 1evels vf service, thraugh the development uf Phase 1. It~, must be understovd, ftt Spvkane C'ounty, has identified leVel vf servic.e as the indicator far prvblems assvciated with development and, therefare, base.d solely Qn IA5 this project will have no imgact. Hnwever, subsequent development of this plat in conjunctivn with development in and arvund this area wi11 require the improvement af several streets and roads within this generaT area ef Spalcane Cvunty. , At the cvmgtetion vf Fhase 2, for this Mtemative, which includes alT 264 single-family and 196 multi-family units, a traffie signal may be wananted at the intersectican vf Sprague Avenue and Canklin ~'toad, this signal wouYd be necrssitated by a cvmhirsation vf factors, first the continued area development and grvwth exciusi je af the Shelley Lalce project, and the additivn of the Shelley ~ce rrvlu~nes, Hawever, this signal should only te prvr+ided if at Ieast four signal vvarrants as vutlined in the M[J'I'CD ing met. If this intersectian meets warrants and the signal has not t3een installed prior tv lphase 2cvmpletion, then it is recommended that this development cantrihute, via an RII], toward it's development and canstruction. Additfvnally, the backgrvund traffc southbaund tn eastbaund teft turns will warrant an aciditianal left tum - being req,uired at the SulTivan and Sprague intersectivn prior to the cvrnpletion of Phase 2. If this dual left tum situativn is nvt present hy the cnmplete buildout of Phase 2, then it is - recammended that this development contribute, via an 1tII7, towards it's development and ronstructiDn. ~ +CONCL€7SIONS - Aftemative No. 2 ~ Based upvn the anaIysis, field observatipns, assumptians, methodolagies and results which are provided 'an the body of this document it is cancluded that for Altemative N0. 2, development vf Phase I vf the 5helley Lake project can be implementesi without haVing a significant impact 4a the averal.l area transgvrtation systern. Additionaliy, subsequent phaises of c.ompletivn rnay have no af'fect to the transpartativn systems within the immetiiate area depending upan any planned vr pmpased transportation sy~siem improvements. The fvllavving are cvrrclusions reached and documenter3 with3n this document: In!'anri Pacific Engineenn8 Corvarry 65 Shellry Lake TU • As with Alternadve No. 1, all study area intersections in 1995 with background volumes added will operate within acceptable levels of service; Sullivan and Sprague (LOS D), . Sullivan and 4th ( LOS E), Sprague and Conklin (LOS C) and Sullivan and 16th (LOS . E). Although these intersecdons are currendy on the margins, there is capacity for additional westbound and northbound movements. • As with Alternative No. 1, if the overall development and growth of the area is maintained at nearly 3.0 percent per year then two of these intersection are expected to fail prior to development of this project, they are Sullivan and 4th (LAS F) and Sullivan and 16th (LOS F). • After the full development of the 56 single family utits, at the completion of Phase 1, . the level of service of the Sullivan Road and 4th Avenue intersection will be beyond the capacity of this intersection to serve not only the euisdng apartments, currently under construcdon but also any additional traffic from the proposed Shelley Lake development. Therefore, without any plat revisions for Alternative No. 2, this intersection will need to be completely rebuilt with signalization and left turn lanes on all approaches. In order to minimize the mitigation from this alternative, it would be recommended that this alternative, be reconfigured to join Rotchford Drive and Conklin Road as a through road directly to Sprague. The reconfiguration, under the existing zoning would lead to the loss of between three and five lots as currendy shown. The 4th and Sullivan int. reconstruction is not solely the cause of this project, rather a combination of current development along 4th Avenue as well as other area wide through traffic growth. • For Phase 2, development of this plat (without either the reconstruction of the Sullivan Road and 4th Avenue intersection or the reconfiguration of the plat) will not be able to proceed as the adjacent street system will not be able to handle the additional traffic volumes. In the event that the plat is reconfigured, then the mitigation recommendations as outlined for Phase 2 completion for Alternative No. 1, will need to be implemented as proposed. At this time, and by utilizing the growth rates for the overall area, it is unclear as to whether ' the development of Alternative No. 2 would require the improvements recommended due to it's development alone. As was proven, that with other area developments these improvements are recommended and required in some instances to allow through traffic progression. Please refer to the recommended midgation section of this document for more detail. Inland Padfie Engineering CompanY 66 Shelley Lake TU ' i . RECO1H'MENDA7If]1VS = Aftemative Na. Z . ~ it is apparent that, Pha.se 1 vf this altemative (56 units) cou1d proceei with very little improvements to the flVerall transpartation system. HoweVer, fiirther develvpment vf this alternative will require either recanfiguration vf the plat, sa that the recammendations for A►ltemative Nv. 1, would be met, ar no further develapanent past 56 lvts nnW the SuIlivan Road and 4th Avenue intersection is oamplitely re6uilt. ClINCLUSIQNS - d1ternative No. 3 Fur th.is apltematsve, nn improvements vther than those requirred far backgrvund traffic and area growrh wvuld be required. 'Phese improvemerats would include the follvwing: ~ Reeanstruction of rhe Sullivan Rvad arid 4th AVenue intersection w include fuTl sigr~alizatidn and lefft tum chan~elizativn. ~ ` Tle additivn vf dua3 1eft turn 1 1 es, both nvrthbaund and southtound vn Sullir+an Raad a t t h e Su l liVan art d 5prague int~rse t ivn. RECUMMENDATIONS - Aftemative,No. 3 The recommendation for the Na Build altemative would be that the improVements listed abvve pr~ either by tt3e County ar thrau~h area wide RTD's, and that future derrelopment, must in same way continue to guarantee thrra lugh traf~ic progressivn and appropriate tevels vf service. I I lnrQ,ut paafic E►,~~ering Compa►y 67 sherrey r.ake TM ~ ~ ~ Level of Servi ce Mexhads, Criteria and Tables lnJanr1 Pace,fic Engineering Qrmpamy SkelFey Lake TiGi F.EVEL OF SERVICE MEETHOIDS AND ['RTI`ERiA SIGNALIZED EVI'EItSECTION: Ievel Qf Service (LOS) is a qualifiable premiise deveIoped by the transportation profession w quantify driver perceptien for such elements as maVel time, number af stops, total aenount of sWpped delay, and impediments caused by other vehicles afforded to drivers whv utilize the transportativn netvvvrk. As defined by the Transpvrtation Research &oard in 5pecial Repori Nv. 2419, the 1985 High►avay-CapWlv Manual. This document has quantified leveY of service intri ranging frUm "A" which indicates littlef iF any, vehicle delay, ta "F" which indicates signifirant ve?uicle delay and traffic cvngesaon and system breakdovvn due tv volumes far exceediing r.apacity. FQr signalized irdtersections recent research has determined that awerage stoppeid delay per r~ehicle is the test available measure of LOS. This is shvwn an page 3. 'I`he tables vn page 3 identify the relativnships per leael of serwice, and average s[vpped delay per vehicle. Using this definition as presenteci in the Highway Capacity Manuals an LOS of "D" is generrallly cansidered tv roepresent the minirnum ac.ceeptable design standard for signalizeci ir3tersecctaons. i]NSIGNALIZED INTERSEC'I'iUN: - The calculation af LQS at an unsignalized or oneltwa way stop controlled intersection Tequires a different apprcaach. 'Ihe 1985 Highway Cagacity Nlanual includes a rnethod for calculating the LO5 at oneltwo way stog-cantrvlled intersections. For these nnsignalizeci int,ersections, LA5 is de~ir►ed differently than ffor signalized iniersectivns in that it is based upan the cor►cept vf "Reserve Capacity" (f.e., that portion of a►railable hvurly capaciry that is not used.) L(7S in the cantext fvr an unsignalized intersection is based upon khe idea vf "Reserve C:apacity," which represents that taaurly portion af the inters€cdon's availabie cagacity which is unuseti. For unsignalizad inLersecctivns, this is based upon potentially availabte gaps in the cvnflicting traffic strean that are avai]able ta make a specific turning movernent. Ari exainple is tttat an easchvund left turning vehicle must yield to toth northbound and southbaund through and 1e€t turning vehicles. If there are ,not very many north and southbaund vehicles, then the eastbound left tuming vehicle wiLl have moPe apporitunities (gaps in the traFfic stream) with which ta make the tuming mnvement. How€ver, $S LraffiG VOlilZ1Ie5 nvrth and southbound increa.se, there are fewer ancl fewer oppnrtunities in which the westbound left can be made. The 'Franspaatatian Reseazch Board taas analyzed unsignalized intersectinns aver the years and has quantitatively and qualitatively determined what levels of sen+ice (LOS) unsi$nalazeci i,ncersections should be by designating LOS 1evels of "A" through °F", with LO5 "A" being the Inland Pacijic Engineering C4mpa►ry A2 Sheliry Lake ~i ! f best cvnditivn and LUS "F" representing a serious operatianal probtem. -The reserve capacity evncept aFplies vnly tri an individual traffic movement or to shaared lane anovements. Onr,e the capacity vf a1l the indir+idual movennents has been calcula#ed and their LO5 and expectei delays deternunedy airl vVeral.l evaluation of the intersection can be m,ade. NormaUy, the movement havi,ng the worst L[]5 -defines the averall evaluatian, hut this may be tempered by engineering judgement. A LAS af "D" is geraerally considered to represent the nniniranum aeceptable vperational standard. All LOS anaflysis described in tttis repart were perfarmed in acovrdance wfth the procedures described above. As a final noxe, the HCM analysis prccedures are based uporr warst case vanditivns, therefnre, #'vr the remainder vf each weekday and thmughout the weekends, traffie ccrnditivns within the study impact area are 1.ikely to te better than that described in this repart. ~ ~ Irdctnd Paeifrc Engineering CanspanY A3 Sheiley Lrke TU I SfGNALIZE[] INTERSECTIONS IN❑tVl[3U►qL LE1JEL OF SERVICE 4E5GRIPTi IONS x; j v I af ~ , u~, r ~ ~ ~ { , t, F';. `L Service'"=~` ~ % rh. 4Y~~ ~ -7iaffic Elovrr Characteristics°°~, Little tv na Svsrage stnpped delay, average is less than fivs Seconds per rrehicle, Most ►►ehicEes do not stop at aEl. Short cycEe lengths may also A cantribute tc1 It]w delay. A►►erage stop delay is in the range of 5.1 to 15.0 seconds per vehicle. This B penera9ly accurS with gond progre5sinn sndlor shOrt cycle iengths. RveraQe stopped de[ay is in the ranye of 15.7 ta 25.0 seconds per Vehicle. These higher delsys may result fram fair ,~roprsssion andlot longer cyale c I$ngths. The number ~f vehtcles stappirrq is aiQmiticsnt at this level. Average stoppe[I delsys are in the range of 25.1 to 44,0 seconds per ►rehicle. The mflvence of c4ngestion hecornes mare naticeable. Lvnqer delays niay result from same combinatiDn of unfavorable progressian, lonip cycle length, or hiAh ValramefcapaCity ratios. Mvst, if not a11, vehicies stop. ❑ 7hl$ Is^ CDF951CIefed LD I]B LF18 EIfYIIL of BCCBpt84l8 dBIBy. Average 5tapped delays are in the range of 40.1 to 60.0 seconds per aehicle. '~hese high delay values generaliy indicate paor pro4ression, Ion~ E cycle pengths, and high volumelcapacity r8tios. Avsrage stop delay as in excess of 60 secands per vehic[e. This condition atten occurs with aver saturativn of the intsrsectian. tt rrsay slso oceur with F ►+Dlumelcapacity r8tios of 1.0 ar ahoVe. ~ 51GNALIZED IEVTERSECTIONS LEVEL OF SERV}GE CFiITERIA n. , , • , Level of StoW,pped Delay, .y,;,~„ _ Sen►i ~4-{oer ehicle'flio ; A ~ < = 5.0 5,1 &Q-1~ n ~ 15.1 xo 25.0 p ~ 25.1 xo 40.0 _ E ~ 40.0 to 60.0 F ~ a 60.0 Saurae: 7ranspanainan Research $nard; "Hiphwa Cspaciry Mer€uaf," Spesial Reaort ~~9 41985f. fntwd PaaJic Eng+ntereng ComparrY A4 Slulley Lake M i ~ IINSIGNALIZEQ INTERSECTIONS - F.EYEL QF SERYICE QESCRIPTIONS y . - ~ w „ . ~r<,, ;<<s~. :zr•~.~..~. 579nera1 DCVMripLiVI! . f .r-., .'k"`• £~j ~'&s~ °`K : . tr.~ I ' lel - Mvra tMen +~e~uste S{aps eveilabfe ta pracead. - 1Jerv seldam is therc marc then ana ►rehicle in tha nueua. ~ B : Littde ds[ay encauntared with adequate qapa ev~ilatsle. Occasionaflu there is mora than orre vahiclain the aueue. Delays ere ehort but psrefefent as tha r►um6er of papa reduce and driver c camfort drope. Usuallv there is moro than vna vahicla in the ouaua. - Alwa}re et least on+a rehicla lin the Queue. - Drivere feel quita rastnctesl due ta thrr faw paps availabla rn which ta make a safe turnirtg mAaromen4. - Delays arv lanp and at this loe drivers mey hepin laakrng fer altamative rvu;es pripr to enterin0 the queue. E - Reprasenta e rsar►dition in wFucR the demend e4uala o► exaeeda the eafa ' mcvement of wehieles Lhraugh the interaecoan. - Alwavs mo►e than one vehicle in ttl2uaue.. • Delays ere Ivng, dri►ear fruattetian is high and it is rsot unueual ta see drisrere F in the queua tum arvurfd to firsd aItarnstiVa routea. - Fvraed iiaw; IIitIE tL1 110 SV9fI9bIB Q8p9. - Reoresents en interaection nt faiiure avr+diUUn, 4JNSIGNALIZED IIVITERSECTI0N5 LE1lEL DF SERVICE CRITERIA ; i; r ;l~a°rs~.a~~ . - , - , ~ , , > ,w~,%~, • ~ w f • , .~eserve Levai 'af ` ~~Expected flela~ t~ a • ~ , tCapacity'ipcph)",~",~~ ~.j~5ervice`~~,, ; • " . Minor 5tree# "fraffic „ 400 ~ ~ A Little of No Delay 300-359 ~ e ~ ShDn[ Tra#ic Delays 200-299 C Average Traific Delays 1~ 00-199 ~ D ~ Long Trafiic Delays 0-99 I ~E ~ Yerry Long Traific Delays Q 3 F Progression Breakdawn Stopped Cvndition - I Inland Pacfic Fngineering Con+Pany A5 SheTTcy Lake TU I~ i,