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27804 PE-1750 SHELLEY LAKE . L ~r A ~ S F C3 K A I'-:I E ~ C3 U iV 'I' Y ~ D1S+15I0IV OF EI+IGTidEERfhIG ANU RC1AL15 • A T71VSSICDN DF THE PUBL[C WQRKS L7EPARTMEIVT WaIIiam A]ohns, E., rAcking Councy Engineer Dennis M 5colk, PE, flirector Nove171beC 27, 1995 Tvdd Whopple, P.E. IPEC SL113]ECT: ,P'1750 - Shelxey Lake P.U.D. Grading & Erasion Cmntrv1 Pi'an lst Review Genfilemen: A review of the road and drainage plaras for this project has heen accvmplished. Areas of concern to us are indicated in red on the attached prints. Flease make the cvrrections and resuhmit them to this caffice in vrder thaC the rewiew process may praceed. VLrhen the n9ans are resubmitted. n1ease mark all cbanaes an the revised nrint in color. In additivn, pOease provlde an informati6n copy raf any utility plans for thts prvject. if yau haWe any questions abvut this re►riew, please contact Ed Parry at 456-3600. Tharik yau. Very truly yaurs, William A. Jobns, P. E. SpQkane Caunty Engineer 4arJd4 EdavPa , Jr., P.E. Fians Revievv Erigineer encls: Plars (1 set) Cemments {2 pages} 5tandard Nates cc:/fajeet fiPe reviewer {c4mments only} 1026 W Broadway Aae • Spokane. WA 99260-0170 •(509) 456-9644 FA7C {509} 324-347$ TF}L3 (509) 324-3166 m ~ ~ _ 9 ; , ~ 5tandard Plan Notes for Develvner Plan Submittals The Contractor is required to hawe a complete set of the approued grading and erosion carstcol plans 4n the job site whenever construction is in progress. F'rior to si[e construction, the Contractor is resp6nsible for IQeating uaaderground utilities. Ca11 the underground utility 1'ocatian service at 456-8000 before yau dig. Sfian+daard Erosion CvntroT Nates These nates are to be 1ncSuded an the pian set when ervsion control faciiities are required and incorporated into the plans. i} An ErosionlSedimentation ConCral (ESC) p1an is required for this praject. Tmplementation af the ESC plan, and constructian, maintenance, and upgrading of the ESC facslities are Che responsibility of the Developer until all construction is [:ampleted and accepted by Spakane County, or until uegetation is establlshed thaoughvut the siCe, and accepted by Spokane Caunty, whichever is later. 2} Approaal Qf the ESC p'1an does not cvnstitute approval of any of the praposed road, storm drainage, grading or uCility design elements shown on the E5C plan. 3} The erosian]sedimentation contro1 measures shown are the rninimum requirements far the anticipated site conditions. The Contractor shall inspect and mainCain these ESC measures daily, and sha91 maintain and upgrade these measures as necessary to prevent sedirnent-laden water from either flcrwing afff the site, ar intv newlexisting storm drainage facilities, such as drywells, culverts, or gravel galleries. 4} The ContractarJg]eveleaper is responsible for installing Rock Constructittn Entries at any and all locations used to enter or exit the project site. ~ ~ ~ ~ sPowANE cvuNTY EtiGINEERs ST(]PRdNG SIGF#T DISTANCE CALCULATIONS Date 27-Nnv-35 SAG VERTICAL CURVE Revie+mv#: 1 Reviewer. Paery Praject #P'1750 Project name 5helley Lake P.U.D. Terrain x Flat (General Iand slope a°/o ta 8°lo) Rolling (General land slnpe y8°lo to 15%) f • Mountains (General land slope > 15°!Q) RDAD TYPE: Urbanl5u bu rban Semi-rurallRu ral Public P ublic ' Laeal Aceess Lvcal Aecess Artena4 ADT< 100 x Cmllector 10D>ADT>4D0 5econdary Major County Arteriai AC]T<400 Pnvate 400EaDT~750 " Extsnsion to 8 or fewer lots A[3T>750 Tract "X" Pnvate Eactensivn tv 8 or fewer Iots Traet "X" RQad name Rfltchfard Drive PVI station 12+00 Length ofvertcal curve provided 100 DesEgn 5peed 44 Min Stopping SigM C]isCance' 275 Entering slope {G1, -5 flQ Exibng 51vpe (G2, °lo) -2 85 G2-G 1 A= 115 Check 5aL' L1 = 25 -4(400+155)1AJ L1 = 117 46 Required minimum curve length' 117.48 Check 5CL Cunre prvvided is Tno sfrnrt L~ ~ A(S"2)1(400+3 5S) L2 = 174 839 wurvIi/a„g93 N I~ 4 Y SPOKAhfE CQUNTY ENGINEERS STOPPING SIGkiT a3STANCE CALCULATICINS Qafe 27-Nov-95 5AG VERTICAL GURVE Review 1 Reviewer Parry Project # P1750 Prmject name 5helley Lake R.U.D. Terrain x Flat (General land slope 4°la to 8%) Rolling (Generai land siope >8°Jo ta 15°/~) f Mountains (General lanc6 slape >15°/fl) RDAD TYPE U rbanlSu bu cban Semhru rallRural PubliG Publtc ' Lncal Access LvcaP Acce55 Artenal ADT<1 0Cl x Cvllsctvr 1 00>ADT;-400 Secandary Major County Artenal ADTC40[} Priv2te 400 =ADT<754 ' Extensian tQ 8 ar fewer lots ADT3750 Tract "x" P nvate Extensivn to 8 ar #ewer Ivts Tracf "X" Road name: Rotchfard Dnve PVI stahan 15+00 Length of verbcal cunie prowded. 100 Qesign 5peed 40 Min 5topping Sigh# D[stance' 275 Entenng slope (G1, °/o), -2 85 E)ubng 51ope (G2, -1 {]0 G2-GI A= 1 85 Check S>L L1 = 25 -((400+3 5S}IA) L1 = -186 49 nate use min curwe length = ll Required minimurn curve length: D Check S<L. Curve provided is Adequate L2 = A{5""2}I(40a+3 55) L2 = 102 683 vcun2.1lAUg93 sPOKANE couNrY ENGiNEERs STOPPING 51GHT D15TANCE CALCULATIONS Date, 27-EVuv-95 5AG VERTICAL CUR11E Re\new 1 Reweuver: Parry Project # P1750 F'raject name 5helley l,ake P.U.D. Teuain x Fkat {Genera4 land s€ope O% to g%} Rolling {General land slope >$°Jo to 15%} f Mauntains (General land s3npe >15%) ROAEl TYPE LlrbanlSuhurhan 5emi-rwrallRural Publie Pubhc ' Lvcal Access Loca1 Access Artenal A[3TC1 [}D x Cvllecivr i 00>ADT>40(] 5econdary Msjar County Arterial ADT<400 Pnva4e 400=ADT<750 ' Extension to 8 ar fewer lots ,FIpT>750 Tract "X" PrNate F_sctension to 8 vr fewer lots Tract "X' Road name Rotehfard Dm+e PVI staban 19+25 Length af vertcal cun+e provided. 310 Design Speed 40 Min 5topping Sight Listance 275 Entenng slope {G1, °lo} -1 4D Exding 5lape dG2, %J 5 50 G2-G1 l= A= B 5 Check S>L Ll = 2S -((400+3 5S}IA) Li = 340 385 Required minimum curve lengfh 360.78 Check 5CL Curve promded is 70o short L2 = A(Sr°2)rt400+3 5sj L2 = 36078 vcuN311Au03 i „ ~ I W SPOKANE CC]UNTY ENGINEERS STOPPING SIGHT DlST,4NCE CALCULATIONS Date 27-R1AV-95 CREST VERTICAL CURVE Rernew 1 Reviewer Parry Prvject # P1750 Prnjevt name Shelley Lake P.U.D. Terrain- x Flat (GenECal Iarid 516pQ a°/a ta $°/o) Roiling (General land slope =8°/a tv 15%) f Mauntains (Geneaal land slope >15%) RC7AD TYPE' UrbanlSu bu rban 5emi-ru raI1R ural Public Pu blic ' Local Access Laca6 Aceess Artenal ADT<1 00 x ColleCtor 100>ACiT>400 Secondary Maaor County Aftenaf ADT<4l7fl Pnvate 400<aDrc750 ' Extension tQ 8 or fewer lo#s ADT>750 Yract "x" Pnvate Extension to 8 or fewer Ints ~~act „x„ Raad name Ftntehford Drnre pVl statian 23+00 Length of verdeal curve provided 330 ❑esign 5peed 40 Min Stopping Sight Distance' 275 Entenng slope (G1, 5 50 Exrang 51ope {G2, -2 00 G2-G1l= A= 75 Check 5>L L1 =25-(13291A) L1 = 372 $ Required rninimum cvrve length 426.176 Gheck S< Cun+e proAded is Tcao short L.2 = A(S"'*2)l1329 L2 = 426778 vciuv2 ilAugO ' 1 sPaKANE courvrY ENGiNEERs STOPPING SIGHT DISTANCE CALCLJEATIONS aa#e 27-Nov-95 CREST VERTICAL GURVE Re\new# 1 Reviewer Parry Praject # P1750 Project name 5helley Lake P.U.D. TerraEn x Flat (General land siope 0°Ja to $°/o) Rallmg (General land slope ,8°/a to 15°/a) f Mountains {Genera9 land slope 315%} ROAD TYPE UrbanlSu bu rban Semi-ruraflRural Public Public ' Lacal Access Loca1 flccess Arfenal AC3T<1 00 % C❑IleCtor 100>AC1Ta400 5econdary Majar County Ariena# F4DTC40Q PflVate 400cADTa7517 ' Extension to 8 or fewer lats A[JT'750 Y'ract °X" Pnvate Extension to $ or fewer lats Trac@ "x" Road narne RotchTQrd Qnve PVI stabvn 28+50 Length af verdcal curve provided 100 Design Speed 40 Min 5tapping 5ight Distance 275 Entenng slape (G1, -2 00 Exrang 5lape (G2, °/d) -3 90 G2-G1 l= A- 1 9 Check 5aL L1=2S-(7 3291A) L1 = -149 47 note, use min curve length = 0. Required minimum curve I@ngth' a Check SCL Curve provided is Adequate L2 = A{S""2}I1329 L2 = 108117 vcurv2 llAq93 SPOKAIVE COLlNTY ENGINEERS STOPPING SfGHT D15TANCE CALCULATlaNS ❑ate' 27-Nov-95 5AG VER7ICAL CURVE Reween+#' 1 Reviewer. Parry Prvject # P7750 Praject name 5helley Lake P.U.D. Terrain: x Flat (General fand slrspe 0°lo to 8%) Rofling (General land slope >8% ta 15°/u) f MAUntains (General land slope'15%) ROAD TYPE hJ rbanl5uburban 5emi-ru rallRural Putilic Pwblic ' Laeal Access LooalAceess Artenal ADT<100 x CalEectar 100>ADT'400 Secondary Nlajor Caunty Artenal AD7<40(] Private 400cADTC754 ' Extension 4v 8 or fewer Ivts ADT>750 Tract "X" Private Extension to 8 vr fewer lots Tract "X" Road narne RatchTvrd ❑nve RVI stabon. 32+00 Length of vertical autve pravided 260 17esign 5peed 40 Min 5tapping Sight []istance 275 Entenng slape {G1 , -3 90 Exrbng 5lape (G2, 1 52 G2-G1l= A= 542 Check 5>L l.1 = 28 -({400+3.55}1A) L1 = 298616 Requved minimum curve length 300.835 Check SCL. Curve pravided is Tao short L2 = A(5""2)1(400+3 55) L2 = 300 835 vcurv111Aug93 ~ ~ SPd]KANE COUNTY E4VGItiEERS STOPPIiVG 51GHT aISTANGE CALCULATIc]N5 ❑ate 27-Nov-95 CREST VERTICAL CURGE Revie+v 1 Reviewer Farry Proaect P1750 Project name' ShelEey l,ake P.U.D. Terrain x Flat (General land slope I]°/a to 8°/'a) Ralhng (General land slope >8°Io to 15%) f Mauntains (General land slo,pe >15°/n) RC]AD TYFE. 4J rbanf5utaurban 5emi-ruralfR wral Pubhc Puhlic ' LocalAccess Lncal Access Artenal ADT<1 00 x Callectar 1 Ua>A0T>400 5econdary Malmr Gaunty Arfenal ApT<400 Privete 400<AaT<750 ' Extensian tv 8 or fevyer 1ots ADT3750 Tract "X" Private Extensi o n to 8❑r fen+er fots Traci "X" Raad name Rotchford Dmre PVI station 35+00 Length ot verbcal curve provided. 300 []es3gn Speed 40 Min. 5tnpping Sight Distance: 275 Entermg slope {G1, 1 52 ExtUng Slape (G2, -5 DO G 2 - G 1 A= 652 Check 5>L L 1=25-(13291A) L1 = 346166 Required minimum curve length- 371.012 Check S< Curve praVided is Too short L2 = A(S'-2)11329 L2 = 371 012 vcuNY IIAu943 INL.ANQ PACdFIC ENGINEERING, IhIC. November 29, 1995 ~ECEIVED W.O. Na. 93143 IEC 0 1 1995 Sp]kane Cvunt}+ Pub1iC Wor1c5 . SPOKANE CaUIV'tyENGlNEZR W. 1026 Broadway Spokane, WA 99260 ~ . - Attn: Bob Brugge'man, P.E. ~ Re; Shely; I~ake Phase 1- P1~-1 750-9 ~R4ad Clvsure - ''raftic v~lan for tt~e Sewer Extension f t Cannery Rvad and 4th Aver~ue. 40e En+elosed 'as a propcased Road Closure - Traffic Cantrol plan for the temporary closure af 4th Avenue at Carrnery kvad. This clvsure is heing requested in arder to extend the sewer being instal.led on Cannery Road into the Shelley Lalce Plat, Phase T. At this time this closure is anticipatei Cv be for approxima[ely 3 ta 4 days. V4'ithin this time frame the scope ❑f wvrk is expected ta include cutting 4th Avenue, extending the sewer intv the plat, back~'itling and cotZtpacting the pipe within the raadway, concre.te patching with 6-inches vf PCC, trroom finishing the surface and a1lowing for a cure pericd. Please reView this plaae. If this plan meets with your apprvval, please natify this vffice and Ed Panry at Spvkar►e Caunty as he is covrdinating revisivns tv the conscructiQn permit. 5hvuld yrau have any comments ar require any revisivns ple.ase cvntact me directly. Shauld during your review you have any further questions regarding this suhmittal or any additivnal features on khese pPans please do not hesitate tv cail. 5incerely, Inla~nd ac'fic En ineering Co. ~ • a, Todd R. Whipple, P.E. TRWItw enclvsures fil ~ e - 707 west 7th . su,te zoa 2020 Lake+wond Dnue - su3te aos 5pokane, 6nAA 49204 Coeur d'Alene, ID 83814 569-458-68+50 • FAl{ 5419-458-6844 208-765-7784 • FAx 208-769-7277 ~ ~ ~ ~ 3'RAFFIC CQNTROL PLAN FUR SHELLEY irAKE 5EWER INSTALLATION ~ 2 Ek wsOor TrPE nI aARRicAaEs w/ ° RoAD cLasEO R11-2 . . RQAD 4th AVF- 4th AVE, ~ CLOSED E'4Sf80UAU1 WESTBOLlNO ~ 'a qASEp AT ~ CL)SED AT AHEAD CAIVHFRY R0. GWNERY RG. w20-3 w20-3 (Mva) w20-3 (MQD) ~~1 ~~=~=;~-~=~=~v=~=;-~--~-»~ ==s-»---------------------y-== F' 4 P I ~ I 1 ~ ~ I I ~ i t 2 ~ a I I ~ e { I I I I I I I k I P I I ~ ~ _._r L -______-__.._____;_t__________________s___.._______.r_-_.~-- ---____j Ly ~KAE~E ~UNTY it1CHT OF WAY --i r __w__-_- ---------_s_-------- n. - - ~ I I I I ~ i _ - - - - ~ I~I ~ I I U~ 43 ~ I I I €71 ~ ~ 3 (D 1 I f ~ ~ 2 L~,..__-...___..,____-_------____--_°__c..:_---------- ---------------J ~ ~ _ ~ lt+[~D NLAND ~ INa ~ r ~'~ft sa° n[~]c~o i i ~ 2 ~ ~ i~ ~ ~ INLAND PACIFIC ENGINEERING, INC. November 12, 1995 W.O. Na. 93143 " . REC Spvkane County Fub[ic Wc~rks W. ~ . . li~2f Broadvvay 3 1995 Spakane, WA 99260 sPo~~~ ~~NTr ENGrNEER ` Attn: Bill Hemmings, P.E. Re: Shelley Lake P'hase 1- PE-1750-94 Grading ]Plan,s for Iteview Bill: Fer a canversatian with gi1l Jvhns vn Tuesday, NvVember 7, 1995, please find enclosed a capy vF the grading plans fcar ShePley Lake. These are being proVided to you fvr your use and review. At this time t.he Sponsvr has hired a Contractor to do sorne mass grading at Shelley Lake to generally raugh in a1l af the propvsed Private R4ads. Hawever, due to the significan# amQUnt af material to be removed we wauld Iike to create the structural fi1l sectivns alang the future alignment af Rotc}aford Y]rive. In arder to fil1 within the aroad pnsm vf a future public rvad a gradinglroad construcfivn permit is required. `I'he actual paving and final evnstructivn fvr thvse fill portions Qf Rotchfard are nat anticipated to be until 1997 and 1998. T apologize far the 1ateness v€ this request but your prvmpt attentaon to this request will be greatly appreciated. Shvuld during your review you have any further questivns regardxng this subrnittal aar any additianal features vn these plans please dv not hesitate to call. 5incerely, Inland T'acifi~ Engineering Cv. . ~ _Tadd R. Whipple, F.E. TltWltvv ettclosures cc: Spakane County, Bill Johns file 707 West 7th • 5uite 20(] SpQkane, l+irashington 99204 509-458-6840 FA74 509-458-6844 - ~ . • ° ~ „ r . . .y IlEC-07-1995 0E3 s 55 I E+ILPttID PAC I F FC Ehaa P. e2 ~ r ~ I~~~~ PACCFIC ENGINEERING, INC. Decemfer 7, 1995 W.Q. No. 93143 Spolum Caunty+ Public Worto W. I026 Broadway Spalcan, vVA 99260 Atvt: Bill Hemmings, F.E. Re: 5helley LWe Fhan I - P&175&94 .DWgn Ikvbtion far Rotchford Drive Bill: On November 29th, 19955 I transmitted to you a design deviation tequest for Rotchford Drive. Yes#erday, December 5th, T talked with Ed parry of your otFrae re$arding thr, aVerall design for this r~oad both horizontally and vertically. Based eapvn that canversatian, I r+eviewed the cntir+e SheiTey iake pre-appiicativn, appUcation and current f1e. From that review as well as thrm yearx of experienoe worldng on this graject I feel that I now need ta request that the design speed for Rotchford Drive south Qf 4th Avenue be 25 MAH. In additiorr we are requesting that the rninimnm radius cunre allavved beyor,d thase in the standards, hut cansis#ent wit, the, retw 5pnlcm County Road Standards and A►ASHT"O be a 350-fooi radius. These rewisel requests are due to #,hm specific itetms within thp- project fUe. t. At this tirno the classificatian af Rotchford Drive narth of 16th to the cuul- de-sac is a kacal road, and the BOCC Findings specificaI.ly state tha design speed for Rotchford south af 4th match the ex.isting Rotchford design ' speeds. 2. I]uring the severaP hearings arid written testimany presente.d by the Rotchford Acres residential neighbarhaod and with concuurreaco hy the BOCC, • that pottian vf Rotchfard, although intended to be a 40-foot wide rvad, wauld be designed and signed far a 25-mph speed lim%t. This was inte~ed tv diacowrage tbrvugh trip mavement between those plats further ° savth of 16th Avenue. 3. 'd`he BDCC artdicated that thEs portion of Rotchford svuth af 4th Awenue wouui.d remain a lacally c7assified raad. =07 vaesc 7ih • suite aoa 2020 Lakewod D►i+e - sufte aos 5pnkaroe, WA 99204 Coeur d`Alere,1Q 8381t 509-458-684 • FAlc: S(}4458-5844 206-75.5-77+34 • FPX:708-769•7177 R ~ ~ I DEC-07-1995 e8: 55 I PILAND PAC I F IC ENG P. 03 + ~ . SpokmC Coi1Rly D4cembe1' 7, 1995 Page 2 In orrder for yuwr d'cPartment cv better pracess thc design deviativn, and to speed the process up, I wauld xecvmmend that yQU either ccyntw Pet Harper of the 5pakane Caunty Engiaeenirg Departmenf, vvho directly representeyd the engineering department during the hearing process or CamWssianer 5teve Hasson on the B4GG, the anly reanaining Bvard rnember frozm the decisian. Yaur prampt atten#ian tv this is greatTy apprer-iated. P1ease ca11.vith any questitans. Since=ly, hI Facific ' cering Co. . ~ . ~ . TUdd R. Whipple, P.E. TRw/tw cc: BOCC, Coanmissioner, Steve Hassan Spokarie Cvunlj,► Enganeer, Bill dQhns, P.E. Spakme County. Pat Harper Landmark Builders, Suster Heim= file + DEC-07-1995 08 *55 I NLArND PAC I F I CENG P. 04 ~ ~ I ma INLAN[3 PACIFIC ENGINEERiNG, INC. December 7, 1995 W.O. No. 93143 apakane County P,a.blic Works W. 1025 Broa.dway Spokane, WA 99250 Attn: Ed Farry, P.E. Re: 5helley L$ke Phm 1- M1750-94 Desi,~ Deviadan far Ratchfvrd I)rive Fd: Per our phone coaversadon of yes'terday, and the subsequent plm delivered to yQU for review, please nvte that afl minimum curve radi are being reviscd at this prne to 350-feet. Additianally, aftes reviewiag the entire tluw year praje.ct file, I arn rrequesting that t'he , de,sign speed on Rotchf'ord Drive be reduced tcr ?S NPH and the minimurn curve taditrs be 350-fect. Thank you. Sincere7y, I Paci 'r8 C ~ ° • Todd R. WhippZe, P.E. TRWItuv cc: Spokane Caunty, Bill Hemaiings, P.E. Landrnark Builders, Buster Heiftnan fle roa 7th . sut~ mn 2020 Lakewood vrive . suroe 20s Spoks ne. WA 99764 Caeur d'A[m. aL] 163814 50"504W + FAX:50445"844 309-765-7784 - fA74 208-769-7277 ~ ~ DEC-07-1995 08:54 TNL.ANII PRCI'F T C ENG P. 01 ~ dATE• ~ ZG: ~ 1NLAND PACiFIC ENGINEERING CQ, ~ CQMPA Y: ' 707 West 7th Ave., Suite 200 474"' w , ~ 5pokane, WA 99204 ~ FAX NllMseR: TefephOne - (509) 458-6846 - ww ~ FAc 9 (sas) 46s-s844 i FRQ 4- 4"2!; N eER vF pA . Joe Nua►,BER fHCL (',E ~ NDTES: ' ~ ~ - ~ - ~FAX TRAN5M15SiOfV i~ SPOKANE GOUNTY OFFICE OF CaUNTY ENG3NEERS CALCULAT94N 5WEET ~ Descriptian: Ulf,5- -/tdA,', 6c4-6-arFcA1a-*1 Projeca Nv.: ?(756 Cwlz. ay: ~ Dai'e: Title: Checked by: Date: Sheer of RlntBS : 4,~4o ~'~e)c,S . , Raferertiu ' Caleu9aflone ` •~9~ ~ ~ ' ~ I f . ' -T-T ° -I J [ ~ (00. ~ - ~ ~ ~ ; ~ . ! 4 ~►2~50 , I ~4 ~ ~ ' 1~ 1 I ; G . - - - - ~ - - 4~ 0 ~ rr I ~ I t ' I : d 'A7 LL G ~ L_J-14 67 , ' S, o~'~- ' Ti ~ j ! ~ i - I '2-~ -ii ~ ~ I J+ 1- H f ~ ~ ~ ~ ~1 'I, ~q I 1 SPaKANE COUNTY OFFICE OF COUN7X EMGINEERS CALCULATIaN SHEE7 c ~ QeseriAtion: Prolect Na: Gfllc. by: Dota: Title: Checked by : Date : Sheet of Nofes Reference d/oo,' 7f 3 ( t ~ ~ I ~xq T 7&~ 2- J1 - -r - , , ~ ~ ' ~ f ~ ' 2 ►~I ~ ' ~ f ! _ , , { I ~----j----t-- ; ~ ; , - ; ; ; 1 ,~~-f~c i - . ~ ~ b44 f- j ~ , k I ~ ~ + I ! e ~ I I ' I j : . - - - p ~ - - 4~i ' ~ I - - s { ~ - - - + r ~ ~~~~~7 •5 - - ~ - F - - - ' - ' ~ - - -.4i~~"~ ~ f ~ • ~ - , - - ~ ~ - - - ~r-- a b r , ~I SPOKANE CvuNTY DFFICE OF COUNTY ENGINEERS CALCULAT1ON SHEET ~ Description: Prolect Nv.: Calc. by: Date: Title: Ghecked by: aole: Shest vf Notes : Raitiretice ~ caiculuflana I J • l rT l~ fY i ~ i - ~ I - - - ' F f i ~ . L- - - ! ~ - q- ~ ; -T , -rt----}- ~ ~ ~ _ - , . ' ~ ! ► ~ ~ z4-1 LLO.~,~ - k ; - 41, - - ~ -yEl'~'YF~'; ~YY ~'i F _ ~ ` ~ ! , _ I f , ~.`L 2" 2 I f ~ 1 + ~ - ~ - 3 T , - ~ ~ ~-I ~ - _ - ~ ~ J-7 ~ 2c,~ 2o~d- - j --~---~r--- 4~+ 67 L ~ _j - - - - ~ ` ~ ~ ~ ~ i , r ~ i , ~ ~ ~ 1' SROKANE COUNTY OFFICE OF COUNTY ENGINEERS CALCULATIDN SHEET ~ pescraption: ~ Project Na: Co1c. by: - ~ oaie: Title: Cheeked by: Do#e ~ Sheet of N'ates I RefPrepce C~ie~~inti~r3 L-4~~ ~ 2,3 5 ~b~s ► ~ I t ' , PJ - ~ ~ e ;3 ~rA~0"P1i ~ 4 I i- ± I -I ~L - JJ11-1 71~ 3 , 10'I I ~ C) ~ I-j - d ~ . v3 ~ , - , . ~ ~ ~2~~''~ . - _ J-1. _ ~~-~----r- I i .,t4~+ ~ ~ ~ 3❑ I I 1, Y ( r ~ ' ~~i , ~ .~5 - ~ 4 ~ ~ ~o _ j ` _ = ~ ~ ~ y ~i,'i 1 • 1~ INLAND PACIFIc ENGINEERIIVG, Ih1C. January 5, 1996 W.O. Nv. 93 143 Spokane Cvunty Public Wflrks W. 1025 Broadway 5pvkane, WA 99264 Attn: Bill ]flhns, P.E. Caunty Eng?ineer Re: sheuey Lake - rE-1750=94 Terrain +Classification - C1'arafiration Bill: This letter is in response to commen#s recxeved in yaur letter dated December 13, 1995 regarding t.he denial of a design deViation for Ratchford I]rive. After, re-review of the ariginal deviation and the plans, several changes haVe been made to allvvv far a resubmittal of the deviation. Hawever, wit.hin yvur letter, the third paragraph, included a s#atement which I need to address at this time, your paragraph fallaws (nvte: boiding emFhasis IPEC): "Pletise erasure that your alignment and profzle ►viI! meet at least the minimum parameters for a Codlector Arteriad (flat terrain), as indicated in the 1981 edition of the Spokane Courty Road Starulard,r. " As highlighted and noted above, this Ietter is now being written to ask you to recind the • tercain classificatian which yvu vniginally noted as ' flat terrain" and reclassify the She1ley Lake area as a rvlling teffain cIassificativn. As you rnay be aware the Rice property that the proposed Shelley Lake plat is an has 6een undergoing changes for quite some time. Most natably, in the recent past, t.he Central Valrey School District, acquired acreage fraran the Rice's for expanding the schovl property and possihly using the land fvr eit.her a District auditvnum or expanding the playing fieids at Central Va1ley Schoal District. As part of t'he agreement between the Rice's and the Central Valley Schval Uistrict, the pcaperty line aefween the properties was to serve as a centerline far a future rvadway. 'Ihe Rice's and Cer►tral Valley 5chaol 707 West 7th • 5urte 200 2020 Lakewood Drive • Surte 205 Wkane, WR 992Q4 Coeur d'hlene. ICJ 83814 509-458-6840 • FA7C. 5[]9458-6844 208-765-7784 • FAx 208-769-7277 ~ . • ~ d I ~ d I~1 1 I I . Spakane County January 5, 1996 Page 2 l7istrict at the time of the land purchase, inVestigated with representatives from Spvkane County the future classifacativns surraunding this roadway sv that the centerline and future 1and positivns wvuld not be affected by any classification madificatians. During this time, they were informed either Verbally or in writing, that generally, they should plan far a vvarst case where this future roadway may be classified as a mTnor arterial. They were infarmed that a rolling classification cauld be assurned and that if they created the legal description of the centerline with 560-fovt radius ~urves that even if the roaclway were classified as a cmllector arterial they would still be okay due to the allawed radii far the rolling classificatians. At this time, the best infarmativn that I haue is that Gary Kenalay and Gary Nelsan were hath involved in these discussians. Wit.h this histary in place, T encvurage you or other staff members to contact Gary Nelsvn as the only remaining Cvunty staff meaaaber whv rraay hade significant input in these matt.ers. In additivn to the histvry of the centerline and the rolPing classification, we haWe prepared several exhibits which we feel wili proVide reasvnahle engineering justificatian for revising your letter of December 13, 1995 fram Yat terratra" to rolling terrain. The first exhibit enclosed is a cvpy af the plat area topographic survey perfvrmed by IPEC's land surveyors. Shawn an this map, are arraws and existing land slapes. Please note that these land slapes vary between 5 and 12-percent, with vne area at 23-percen,t. Based upan the 1981 Rvad Standards, f.his wauld mean that this area generally lies between the flat terrain and rolling terrain classificativns. However, 'rn 1995 Spvkane Cvunty, revised the 1981 Raad Standards, and in mast instances lowered curve and teffain dassificativns tv rnore elvsely match thvse fvund in the mvst recent editions af the Armerican Associativn of Sfi.~te Highway and Transpartation C)~F'acials (AASH'TO) green book. The current 1995 Spakane Cvunty ~oad Standards (SCRS) haae reduce the xerrain slopes from the 19$1 SCR5 fvr a rvTling classification tn between 5 artd 15-percent. As na#ed this is where the existing Shelley Lake slcapes fall. Therefore, we feel that, if the County has debermined t.hat 5-percent vvas the minirnum threshold fcar the rolling classification in the newly revised SC1tS and we mee# ihis nexus then the classification should be revisgd vri this basis alane. The second exhibifi is a cerpy of the praposed prvfle fvr Rotchford Drive, fram Sprague to the Cie in with the existing Ratchford Drive at the svuth p1at boundary. VVhi1e we admit t.hat within the vaey, the yaIley can be regarded as generally flat, the She]Tey Lake area wirh the 1ake and steep hiUs surrvunding the lake results in a significantly different landscape. As shown on the raad plans provided the centerline prvfile as cunently laad vut has slapes to nearly 7-percent. As nated vvithin the 1990 AASHTO green bavk, page 226, which is enclased, the rolling classification for roadways is as follaws: ~ I~ Spvkane County Tanuary 5, 1996 Page 3 Rolding terrain is that condition where the rtatterat slopes cansistently rise ahove arrd fadl helow the roal ar street grade arui where occasiontt2 steep slapes a.,~'fer some restrictian to raarmal horizontal arrd vertica2 roadway adfnemerzt. As shown in the Rvtchford Dride proffle pravided, yau can see where the natr.iral grvund Iine definitely rises and fa11s below the proposed profile where proposed cuts and fill areas have depths between five arad ten-feet. AdditivnaTly, the proposed grades Iengths a1ong the roadway, as described vvithin AASHTO, will cause txucks vn the upgrade tn reduce spee.ds below those af passenger cars. An example of vvhat can be expected by the 6-percent plus raadway grades is fvund in the description sn pages 227 and 228 enGlosed for yvur reference. Irastly, the rvlling designation can be substantiated by the closing paragxaph in bvth the 1981 SCRS and the 1995 SCRS and demanstrated here that for a rolling terrain classification trucks can be expected to reduce speeds an same sectivns af roadways and this is true far the vertical alinement of the proposed Rvtchford Drive. Based upon this presentativn, the enciQ~~~ exhibits and exC~~~s from tne 1990 aASxTo green baak, we feel that the Cvunty should be ab1e ka reclassify the Sheltey Lake Plat area as an area which shauld be classified as ralling. Should yau haVa any questivns or cvmments relating ta or challenging the information provided I would apprecxate a phone call at 45$-6$40 sv that a conversativn vr meeting can be made tv minimize future potential conflicts and miscommunicativns. 5ince ly, Inlan Pacific n' ee 'ng Ca. r - . Todd R. Whipple, F.E. TRWltvv ec: Landmark $uilders, Buster Heitman file 4 F ~ ~ • . R w ro . ~ 's ~ ~ ~ x ' ' ~ » . , ~ 4 a $ .o ~ ~ y E ~ ~ ~I , 226 A.ASHTCJ--Geometric Design of Highwuy.s and Streets 5 cross sxopes, there is Tess difficulty in returning the edges of gavemeni ;.tv a normal section arnd 300 ft may be decreased. 8. The "broken-back" or "flat-back" arrangement of curves (having a shart tangent between iwv curaes in the same direction) shvuld be av+~ided except w~here very unusual tvpographical vr rigt~t-crf-way con- ditions dictate otherwise. Except on circurnferential highways, mast driaezs da not expect succeeding curves to be in the same direction, the preponderant conditivn of succeeding curues in opposite directian develapang a subcvnsciaus hahit in drivers for following thern, Bro- ken-back alinernent is alsa not pleasing pn apgearance. Use of spirai Pq' transitivns vr a campound curVe alinement, wherein there is svrme degree of cvniinuous superelevativn, is greferabie for such conditions. - "I'he term broken-back easually is nat applied when the cnnnection tan- gent is of Gonsiderable length. Even in this case the alinement wi11 he . unpleasant in appearance when both eurves are ctearly visible fQr same distance ahead. 9. TQ avoid the appearance of inconsistent dzstartion the horizvntal alinernent should be caordinated carefully with the prQfile design. F-` General contrvls for this eoordination are discussed in the section .`i "Comhinatian of Horizr►ntal and Vertical Alinement." f ~ A**r~. VL~+ 'r~~l~'+.tll~ ~~AN~~~1~~{a n+, The topvgraphy of the land trauersed has an influence ort the alinement of roads and s2reets Tapagraphy does atfect horizontal alinement, but it is more evtdent in the effect on verticai alinemeraC. To charac[erize variativns, engi- neers generally separate tvpvgraphy int❑ three classifications according to ter- ; rain. • Level terrain is that conditiQn where highway sight distances, as gaverned - by both harizontaf <<ncf vcrtical restrictions, are generally lang or cauld be ' made to be sa without canstructi6n difficult or maor expense. ' ~0 Wmg terr•a'n ~s bat c ndT •ion where tlae natur-a1 sii~e~ al av r~~l fal[ b~,w thZTERad owc~Cec-,t ~,rrade ar~_ wt~ere k-ca~~r~~aal st~& e~ , f~ r s ~ ~ ~ e eestri ![]Tl t~n n''r»nti ~rr,~i@n a a~d '~e-~r ~i'c~a[ ~ a ~ w~y alin~- , ~ ent. Mountainous terrain is that cvndition where longi[udirtal and trara5verse chan~e,s rn tt1e elevatevn of the ground with respect to [hc road or s[rcc¢ are I:Jemcnt.r of Dc.4wir 227 abrupt and vvhere benching aiid sZelc Iiifl cxcavatian arc frequcntly required to obtain acceptalale horizontal and vertica'i a[inement. Terrain classificacivn pertain ta the genreral character of a specific route corrider. Routes in vaiieys or passcs or cncruntainous areas that haue a!1 the ~ characterastics of roads ar streets traversing IeveI vr roaCing terrain shoulet bc classified as level or rolling IIII M ~crrL1~n gc gga.rdw . tcep c + n ~ ~ uc ~ redu.c s~~eci, b~law tbacas~ ~ swj= anci rnountainous terrain aggravac sthe si[uation, resulting in some trucks apera[- ing at crawi speeds Grades Roads and streets shQuld be designed to encaurage uniform operation . throughout. Llse of aselected design speed as previously ciiscussed is a mcans . tawards th1s end hy correlation of various gevmetric features of the road or r street. Design values haae been determined and agreed upon for many high- way features, but few cvnciusions have been reached on roadway grades zn relativn tv design specd. Vehicle-Qperating characteriscics on grades are dis- cussed and reIatians vf grades and their Iengths to design speed are deVelaped v~: in this secticrn. ~ . :x•,, • v Vehicle-i7peratirrg Characteristics on Grades 3 Passenger cars. The pa°aetices of gassenger car vperators with respect to grades vary greatly, but there is a generai acceptance that nearly all passenger cars can readily negvtiate grades as steep as 4 to 5 percent withvut apprecia- =g' ble lvss in speed belvw that norrnally maintained on level highways, except far - cars with high weightlhVrsepower raticrs, including svme campact and sub- , compaGt cars. Stud'res show that operataon on a 3-percent upgrade, campared with that on the leveI, has ornly a slight effect on passenger car speeds under uncvngested -k . cvnd'ations. Qn steeper grades, the speeds decrease pTiQg1'e551Vely with an increase in ttte ascending grade. C]n downgrades, passenger car speeds gener- a11y are slightly higher than on leVel sectians hut lvcal condicions godern. 59-0 ge ed am_ m or~ p0 _ ~han c~n ~p~ec~s vf ~ assengpr marts:. ~►~v~rage s.~e~ ~f t~r~~1~~s ~n l~~~e1 sec.~~ioro~ ~f hhe a~rer~~g~ sigeed oICasseng~r cars. ~'ru~~C•~ displ~,y u~ ; ~ c~ abc~ut a S~,~er„~c-„ent.i, ncrease n speed on do~,,wng~a.de_s a.md ab~,ut a 7 p~rc~nt or ciecr.a_s~ in s,p,eed on up~g,rades as c~m;pa~ ap~rat+ion ~n t~he l~uel. ~n e~r t' ~ . 228 AASHTO-Ceometric Design of Highwcrys crnd Streets E[em u,~,g,rades ~~~i~ Va~ax~i1muim~szp~,eed~~hat ~a~n~~~irat~i~rrea'r~y~t~r~~ ent 1 ; aF ~ it, anaz'1!y ~n t+h+~ l~n~~t~h and~~teet~r~ess of ~~he grade a~~d~the w~igk~tihars~1aaw~e~-- ; i i ffim ~ a~~~,ch is the grass vehicle weigfit dividUd Uy ti►e engine horsepower Other Vehicles that affect the average speed aver the entire length ofgrade are ~ the enEering speed, wind resistance, and skiil of the operacar. The last twca ~ cause ornly minor variations in the average speed. Extensive studses of truck perfvrtnance hawe been conducted ta determine the separate and ccrrnbined effects of roadway grade, tracCiue effort, and gross vehicle weight (34, 31, 32, 33. 34, 60) 'Y'he effect of eate an+d length of grade an the speed of a typical heavy truck I is shvwn in Figures II1-27A and 1II-27B. Frorn Figure I1I-27A it can be deter- , mined how far a truck, starting its ciimb from any speed up to 55 rnph, travels ' up various grades or cvmhination5 of grades befare a certain ar unifarm speed is reached. For instance, wiCh an entering speed 4f 55 mph, the xruek trauels ~ ~efe~re its s eed is reduced to 25 m h. ' h• 'r 1,65a ~t u a_fWmnL- .~eri~ sp e ' m , t~ c1rf 111'5 H$ a . a~~aut 1o mph, hts is determined by starting vn the cnrve for a6-percent ~ a grade cvrrespond'rng to 30 rnph, for whzch the distance is 1,400 ft, and pra- ~ ceeding a1Qng it ta €he point where the distance is 1,000 ft mare, or 2,400 ft, ' CL far which the speed is about 16 mph. Figure III-27B shaws perforrnance when the truck approaches the grade at ar belvw crawl speeel. The truck is able tv , accelerate to aspeed of 25 mgh ar mare only vn grades of less than 3.5 pet-- i cent. These total data serve as a valuable guide fvr design in appraisrng the ~ effect of trucks on traffic vperativn for a giVen set of profiie canditions. i Travel time (and, therefore, speed) of trucks on grades is directly related [o ' the weightlhvrsepor►rer rativ. It has been assumed that vehicles of the same ~ wekghtlhorsepawer ratio have similar aperating characteristics. Hence, this ' rating is cat cansiderable assistance in studyinp the performance of trucks. ti Mvrmally, the weightJharsepower ra[io xs expressed in terms of grvss weight ; and net horsepvwer It has been fvund that trucks wEth a weightlhorsepawer ratia of abaut 300 have acceptable operacang characceristics from the stand- pvint of Che highway user. Such aweightlhorsepower ratio assures a minimum i speed of abcrut 25.5 mph on a 3-percen[ upgrade. There is evicfence that the automative Lndustry wouZd find a weigh[Iharsepower raticr of this magnitude accep[able as a minimum goal in the design of cvmmercial vehicies. There is also eaidence tha[ carrier operatvrs are voluntariFy recvgnizing this catia as k the minirnum perfvrrnance eontrvl in the laads placed on trucks o£ different pvwer, the overall result being that weightlhorsepower ratia of trucks an high- rF. Figut[ ways has impraved in recent years. This is xllustraCed by Figure 1I1-28, whrch evmpares such rativs as deueloped from znForrnatian obtained sn conjunctian with nationwide brake perfvrmance studies conducted in 1949, 1955, 1963, 1975, 1977 and 1985. The daca show, for exdmple, that fpr a gross rrehicle ;.i ; ~ ~ ~ t C y'~~ ~ ~ 2.00 ROAD TYPES & GEC)METRIG FEATLIRES 7. Gounty raads are classified functionally as shawn in subsectians 1. 12. Sased an these cla5sificativns the criteria fvr right of way, road width, and other geometric features shall be as stated. Functivn is the cantrolling element far classifr,atian. Ac.cess, spacing, AaT' and pHl/r are merely typical. 2. Terrain is a basis for further classificatian of geometric requirements. A. Flat terrain is that conditian where raadway sight dis4anc.es, as govemed by both horizontal and vertir.al restrictions, are generally 9Qrag or could be made to te so without constrraction difticulty or majar expense. The general land slope is from 0°Jo to and including S%. B. . ~~iterrain is that conditian where the natural slapes rise ahove and fall belaw the roadway grade line ransistently. Nvrranal roadway alignment is restricted same by vccas"ortsteep sla~s. The general Iand slope is from -0Ia tt~ d- ~ 'I~~+_1Gluding 1 ~°fo. C . ountainaus teRain is that conditian where hvngitudinal and transvgrse dhanges in the elevation flf the ground w(ith respect ta a roadway are abrupt and where the roadbed is obtained by frequent benching ot side hill • , excavatian. The general Iand slape exceeds 15%. Terrain classificatian pertains to the general character of the specific raute corridor vr general charac#er of the land surrvunding aprvposed develo,pment. Rvads in ►►afieys or passes of mountainous areas that have sll the characteristics of raads traversing flat nr ralling terrarn should be cIsssifed as flat ar rolling. In rolling terrain, trucks r+edue,e ta speeds belaw those of passenger cars vn some sedions of roadway. Mountainaus terrain is responsible for svrne truck operativn at crawl speeds. In cases wh+ere the terrain classification is in question, the final decision shall be rnade by the County Engineer. 1. Average paily TraTfic 2. Design Hourly Vvlume 4 1 , 5pokane Caunty Standards Page 10 January 1995 ie I~', N 3.00 RflAI? TYPES & GEUWTRICS ~ A. County raads are classified functi.Qnal,ly as indicated in ssabsectians 3.01 ta 3.07. Based on these elassiPfcations the criteria fvr right nE raay, raad width, and other geametrics shall be as stated. ~ Funct.ian is the contra113.ng element far classificarion. Access, spacing, ADT and DHV are merely typfcal. 8. Terrain classification 4s a basis for further breakdawn vf geomerric requirements. . - 1. Flat terrain is that condftion where roasiway sfght distances, as governect by both hor3.zsxnt- . a1. arad ►+ertical restrf,ctians, are generally 1ong ar cauld he made t❑ be sp without con- struction diEEiculty or major expense. The gerTeral J,and slape is from 0 to and ineluding $ - percent. 2. RoPling terrain is tha[ canditinn where the natiiral $loPes consisCently rise above and fall belmw the roadway grade Iine and where accasional steep slapes offer some res[riction Co narmal roadway horizantal and vertical alignmenC. The general land sxope is fram 8 percent to and including 15 percent. - 3. Mountainous terrain is thst condition where longitudinal anc3 transverse changes in the ele- taation of the ground wiC1t respeet t❑ a roadway are ahrupt and catiere the roadbed fs ❑btained by frequent henching ar side hiI1 excauat3.an. The general land slope exeeeds 15 percent. . Terrafn classification pertains ta the general character of ehe specific raute carridor or general charaeter of the 1and surrounding aproposed derreZapment. Raads in rraTieys or passes af mounCainaus areas thaC have a11 the +characteristi.cs of roads traVersing flat or rolli.ng terrain shauld be elassi- fied as flat or ral.l.ing. In general, rvlling terrain candittans cause trucks to reduce to speeds taelow those of passenger cars vn some sectivns of roadway and mountainous terrain causes same truck aperation at crawl speeds. In cases where the texraiiz classification is in question, the final - decision sha11 be made by the County Engineer. •3 ! T ~r TERRAIIV CLASSIFICATIDN Project # P1750 Prnject Name Shelly Lake P U.D Road name Ratchford anve - Sprague tc+ 12th 1981 5CR5 1995 SCRS Station Elevatian Length Grad'e Classifieation Classification 850 20758 1000 -0,0101 flat flat 1000 20657 28 -Q 2036 /mountainous mauntainous tiazs 2060 72 -00764 flat //rnl{ing 1100 2054. 5 50 -0 0S0p flat flat 1150 2052 1 00 -0 Q220 flat flat 1250 2049 S 53 -00208 flat flat 1303 2048.7 100 -0 [1590 flat /ralling 1403 20428 103 -Ci D9D7 flat flat 1506 2041 .7 63 -C] 0"111 flat flat 1569 2041 93 -Q 0215 flat flat 1662 2039 88 00000 flat flat 1750 2039 24 -0 0042 flat flat 1774 20389 41 -a 0220 flat flat 1815 2038 97 00206 flat flat 1912 2040 55 0.0091 flat flat 1967 204{15 33 00273 flat flat 2000 20414 28 0,0244 flat flat 2028 2[]42 47 00830 /rolhng /rolling 2075 2045.9 50 00683 flat Jrvlhng 2135 2050 94 0,0457 flat flat 2229 2054.3 49 0[}327 flat flat 2278 2055 9 72 00222 flat flat 235[7 2057.5 60 00067 flat flat 2410 20579 ~ ,p G F ~ 2410 2057 9 64 -0 0141 flat flat 2474 2057 138 -0 f}238 flat flat 2812 20537 168 -D.fl143 flat flat 27$Q 20513 34 -0.0353 flat flat 28°f4 2050 1 29 -4 D034 flat flat 2843 2050 197 -00203 flat flat 3040 2046 51 -00039 flat flat 3091 2045 S 69 -00130 flat flat 3160 20449 113 1035 /ralling /rolling 3273 20332 60 00017 flat flat 3333 2033.3 63 00571 flat falling 3396 2i}3fi 9 59 00686 flat /rollmg 3447 20404 37 00189 flat flat 3484 2041.1 63 -00095 flat flat 3547 2040 5 25 -C] n6(]C] fiat vfaliing 3572 2039 7 -0 0143 flat flat 3579 20389 8 -01750 imountainous muntainous 3587 2[337 5 8 -fl []875 rflllmg roliing 3595 20368 10 -00600 flat f/roliing 3605 20362 45 -0 05$9 flat /raliing 3650 20331 ~ 20 -0,0850 /rolling Jnroliing 3670 2031 4 85 -00588 ffat rvNing 3755 20264 35 -0 0371 flat flat 3790 2025 1 29 -00034 f[at flat 38`I9 2025 19 -C] a31E flat flat 3838 20244 20 00200 flat flat 3858 2024 S 17 00000 flat flat 3875 2024 8 ,~I 3875 2024 8 1405 -0.0085 flat flat 40155 2[}23.6 336 -O.0060 flat flat 40491 20234 141 00071 #lat flat 40632 2(}23 5 61 8 00049 flat flat 4'k25 2023.8 $9 2 0051 flat flat 41642 2024 298 0,0336 flat flat 4194 2025 34 OOQQ flat flat 4228 2025 55 -0 OQ18 flat flat 4283 20249 17 0,0059 flat flat 4300 2025 150 fl OC133 flat flat 4450 2025 5 132 -0 aQ08 flat flat 4582 20254 102 DD69 flat ffat 4684 2(}24 8 109 -0 Oa73 flat flat 4793 2024 74 -0 D1D8 flat flat 4867 2023.2 24 a{] D292 flat flat 4891 2022 5 325 -0,I7295 filat flat 49235 2021 $ f f - - . 1 3s~~. 3336-5 . i F I ~ r ~ (4•4 ~ro , " ~t Au 0.,ZAvk,, pl wr !i1 I , ro iNLAND PACIFIc ENGINEERING, INC. ,~uary 1996 W.O. Nv. 93143 Spokane County Public Wnrks W. I026 Broadway Spokane, WA 99260 Attn: 'B~'~~~?~&E. County Engirneer Tte: Sheliey Lake - PE-1950-94 RotcCYiford Drive, I3esign Deoiatian E3i1L ~ Per yaur phvne canversation tvday we were piease to hear that you feIt that a rolling terrain classificativn ~~r.. t Shelley Lake w+as in fact a vaIid determination. 'I'herefore, based upon the acceptance of the rolIing r~ terraisa classificatiDn we would dike to suhmiC to you a design deViatian foa' two curves aFong the proposed ~ Ratchford i3riVe alignrnent. As noted in the de,sign deviativn form, these two curves 1ie between Sta. 16+96.02 to 22+81,98 and between Sta. 34+98.53 and 39+18,07. As yvu are aware the proposed elassificatian far Rotchfnrd Drive is to bc ColPectttr Arterial. Hased upan the design requirements as found withF,n the 1981 SCRS, the grQposed design deviativn is to reduce the minimum harizantal curve radius from 410-feet to 350-£eec. Althvugh, not being submitted under the neva 1995 SCRS, the new roatl standards allaw a minianum radius af 35(}-feet for a Collectvr Arterial. Inn confbrmance tivith }avth the 1981 and 1995 SCRS, these minimum radius curves are expecfiei to be in fu11 super elavation with a side slQpe {e.,,} not to exceexi 0.04'Ift. Per aua grevious subanittal regarding the ratling classificatian we providecl the propvsed raadway plan and profiIes for Rotchfard Driva, we waurd recommend that you reuiew these documents fcrr alignment infarmativn. Additionally, I have included variaus excen-pts from rhe 1990 American Associatian of State Highway and Transportation C)fficials, green bavk which wilt allow this reductian an radius from 410-fe.ct to 350-feet. Shauld during yaur review yvu haVe any questivris pleme feel free to ca1t. As was statei in aur meeting on Friday (1J5196), at fihis tQme we are reatly to submix the streeC and storm drainage plans far review, therefare, yaur attentivn to this matter is greatly apprecrated. Ttlanlc yau. Sincerely, Tnlan Pacific E ineering Co., Inc. , VED , Todd R. Whipgle, P.E. ~ T'RWltw enclosures ~ SPOMNE L`UU!qTY EPJGINEER ' cc: L.andmark Builders, Huster Heitman file 703 West 7th • Surte 200 2020 Lakewaod E7rrve • 5uite 205 Spokane, WA 99204 Caeur d'Alene, ID 83834 509-458-6840 • FAx 549-458-5844 208-765-7784 • FA7(. 208-769-7277 ~ ~ ` , '~.r aa ~ ~ . ~ , ~ . ' ° f~ . ~ ~ ~ . ~ 3.01 Urtrara]Suburban Street Design Requfrements ~ A HT E R I A I. S ~ Raadway Glassificati❑n M Local ~ Colleceor ~ Secondary ~ Maior ADT ~ V~riable ~ 500-5,000 ~ 1500-40,000 ~ 1500-4[],000 ~ 1 k`kat 30 4{] 45 45 ~ Design Speed (m. p.h. ) Rolli.ng 25 30 35 35 Mountai.nous 20 30 30 30 ~ Minimum Flat 41(~ 955- ~ 955, 3iarizonCal 2 R81.ling e.j [J • ~aZ~ 560 560 , ~ Curvature (feet) Mountainaua 154 41(] 410 3 13esfrable Maximum 8.0 8.0 $.0 8.0 Grade (iC ) Desirahle Minimum 0.8 0.8 0.8 0.8 . 1,2,3 1,2,3 1,2,3 1:2,3 , ~ Rnadway Cross Section No. Flat 200 275 315 315 ` Stapping Sfght Distance ltolling Y60 200 240 240 ' ~ (£eet) MounCainotxe 120 200 200 200 ~ Within the abaae garameters, geometric design requirements shall be determined for specific roads based ❑n W.S.D.H. Deefign Manraal and the Washington State Urhara Design Standards for Nera Construction. I ~ NOTES; 1. The design speed is the eontral3,ing criteria. ~J 2. Values shawrz fmr harizaneal curvature sssume no superelevation. 3. May be steeper frar short distances where germitted by County Engineer 2X). 4. Itoadway width may vary with grojeeted trafffc ►rolumes. ~ ~ ~ Dats: 8113187 -12- ~ , 1 t~ M ~ [[[l~ , ~ J ~ ~ ~ b ~ . , . s Minimum Tvve Urhan Arterial Rural Arteriat Design Elements Cla~fflcaUon Principal (Controlled Pdndpal Minar CvAector Minor vr Major Collector ►4cces.s) Nracontrofled) Canstructian Curb Shaulder A4f Al! REI Shoulder' ADY All A!I All ~ Alf All ~ Below 400 ~ 4DQ~2000 ~ Uvar 2000 Dasign Flat 55 55 40 40 AD 5o 50 55 Speed (mph) Ralling 50 5[I 40 35 35 40 40 5{? Mvuntadnous 40 40 , 35 30 30 30 . 3(} 40 Horizontal CUrv$ Fsat 1190 1190 575 Sp0 765 785 960 Radivsa {ft) Ro1ling 955 955 544 350 35O 470 470 785 Mountainous 500 5oo 350 230 255 255 470 Supereleva6on (9~) Mamum ~ 4 ~ 4 ~ 4 ~ 4 4 ~ $ ~ a ~ g Grade Mwdmurn 6 fi 6 8 8 8 6 6 F Minimurrr 0.5 0.5 0.5 0.5 4,5 0.5 a.s D.s 5topping Sfght Flat 450 450 275 275 275 400 400 450 ' Distance (ft) aalling 400 400 275 225 225 275 275 400 Mountainnus 275 275 225 200 ZOa 200 200 275 fitersection S~ht 06-tance(f4] ~ AASHTD Chaut r UC `Sl9ht Disbnce" pages 739-766 Cres# VBrfical Fla# ISD I5O BO 6o 60 110 110 150 Gurves'.a,r (Fg Roliing 110 110 BD 40 4[} 60 60 110 Mauntainous 80 BO 40 30 30 30 30 60 5ag Vert{csl Flat 100 100 80 60 80 90 90 100 Curaes",' (IC) Ralling 90 SD 60 50 50 60 B[] 90 Mountainous 60 BD 50 40 40 40 40 60 See next page far fvotnotes. TABLE 3.01 ARTERlAL STREET DESIGIV ELEIIAENTS Spvkane Couraty Startdards Page ~ 3 January 'I 395 . 1 _ ' _ . . . RECEIPT Dmte 19~ ~ 2164 ReceiVed Frvm ~J~ ajP.'JP' I YW&LkA ~ Addc ess rkLwi~...~ ~ O / - 1 0 0 Dollars $ 20- 00 Fr ~ a V I Q4 ' tC t ACC4 HOiN PAIO Awr vF AccouNr ''sH ~ nMr rAIo crtEcK 1 MONEY BARUECE 4R ER r~ "Y-46 $If BQ8 i ' , _ . . ~ , . • ~ . ~1,Y . _°r.., T . • - . , - , - - INLAND PAClFiG EHGINEERING.G[3:,.ENC;.. 0'8 4 $ . 7Q7 w rrw AvE. SUIT~~200' . • 1NrA5HINGTOWTRlJST.BANK - - ' SPO3CANE: WA 99204• , ' ' . . - _ • _ sRaKANe' wnMsa-a1sa~ 28-&+251 - - - ~ ~ . ' • ' • . • - - 'F-'.. , ~ , • . , - ` _ _ . , •~:lt • n~• 4~..'z.F,~~. _ a ~sl' , ` ' _ • ' I "'f ' ~ + ` ' I `,ili:`. % _ e./-~ ,`I _ . , . • . " ' ' rv-~l ' • - ,•,~.r'. ".di'.{/„Y ' ' - .'r~ ~ . , []ATE fJGAETRpL;N❑ ' • _ kMQUNT, - ' ~ ,r7 ~ y~~ ~ ' - , '~ti.. . -r. - _ 1*~%:.:',2'/g5N. ~10848. ' . 30 []0 , .-i: _ ' J.~ . - .r,. . .rf.,-_;.' :C.~'Y: 1 , r- . - - - - . i , \ e.), i/~ ~ ~ ' f ~ . f~h~~ i ~1~. ~ % . _ , ,.S L ,..~f.~r.... - _ J~FV~...~1°._ ,...t:J ;'r,-:'.•.'",-...i: _~i~.,_ ~x~i ~y.'.-:yr.• - ~ . . ' . . _ r.Y y•'r.ti.J..~,~(..d'~'~,k~CL:E `I'~IIViI'Iql.~'l~`1`[~~~`. 'WI.FL.'~."1'9flw~iF#~#{L, rfCi-::49.` ;~s.~. ~~1. •~,.r`~ ~~r , - , ! . . , ' * . _.P14f:, _ '.~,r~ y _ . ~ ~}4 R'. Ler';r. ~ irS. ' ' hirrri'i,S, `r. ^Yil/`.,. 1. :kr `•7- . - • ' ' ~a.e i~' 1. \r •j~~ ~E~ • . . • ;f••M:,; it't•p_.'S~^' ' ~'r~.~^f:'jij.''_.~~y~: p~i~•,.1.~~~~_`~.~~ _r, ~ , • . TMIrt . aFtoF a~.,:= ~~?~#~Ai~l~ --GCJ~lI~~'"r';~ ~~iG:i.l~~~~?5:.. tirc- ~i.;•.;~.:'~,.4.~ . " .lN1:ANQ-RACIFICE3+1GENEERIfdG C{} , iNc. _ ..i•`= _r•`e.. ~r• - - - -a • i' ,'-1n : { ;t~--y_~~,z~' *,'.~;;~"ei::a~ ~ :~'i"" ~:e i: - • ';i;.wCaENFFIAL AL`CDUWT - ' - - %,t-, ti '•a', ~ . • .t ~='t'r'':,•, . :•~-I - ui-~ - ' _r-13:-•- ~ - - •?~•'r.',;- i.•R=r;il.:`~:•F~_' a~•ci. `~~'"i•~'f~`'-,t~t . - ° . ' . - ~i•`.~e( 'F.i r. ~ .t_' . ..:,t\ G•~ ~`'i. i , ;i•t~• AY r ~ _ .y i~~;•, f14 4• ,'-d:.~•;L~ -5~ ..i - , ~ "'ti` ril,- 'i• /hr `rr,-~k°.~:~~'..~~ir'^`i~' Y'~: ~Y.',;i.i '',~~1,,'~,'ft?' r:,^y= . , _ ' '_t_ ..,v .af;s~ •'tz•• `~~3•Z. r~ . ~L,~.s~,.~,.rif.:~~~ ` y ;;{.::,.-:r;;'' J_. °.a.;-YP-=. ~ ~ n•`:' - - - - _ ' r! :6 , ~'.<.~7'[.'Y •f,`;' _ ~ ~ i. ~ •ti:.~~;'^,~ = r~t: i.~-"' "j- }~,m~,~•.-' r''.-.~° - ,.•;rAi1THDRtYE[153CdJA i084 TUPtE ' ~6`.a'~a'u~ F.y?~ . E~ C~ oB°: 0:9=.~~~4..1''.4~3 • • "s . ,:,•LL . . ~ . . ~ •~-.,•t•,-,•. • r, , ,~;~;,:T y < , , , - ~ ~ ` ~ ~ ~ h + r ~ • ~ POLA~ ~ ~f H~~~~~~~ and ~ STREETS I ~ ~ 1990 ~ ~ 1911 " ~ . A,merican Association of State Highway and'I~ansportation Officials _ Suite 225, 444 North Gapiiol Street, N.W. Washingtun, U.C. 24001 ~ (202) 624-5800 OCopyright, 1990, by Arnerican Associatian of 5tate Highway and Transgortatian Officials. All rights reserved. This bvok, ❑r parts thereof, rrtay not be reproduced in any . farm without written permissian of the pubIisher. Printed in the United States vF America. ISSN 1-56051-00I-3 ~ a Dal.~rg rt C«►i 1rrJ1.► rc►lc1 C►alGr-rrr 67 I by traffic control dcvic:c5 ra[licr tlidiFl by the phytiiLGil characccri"[ics oE the ~ street During pcriads of low-to-moderatc volun7e, speeds are govcrned hy sueh faetors as speed IimEts, midblack Friction5, and intersectional frictions. When arterial street improuements are bcing planned, the design speed should be considered wEth factors such as speed limits, physicai and economic ' constraints, and the 1ikely ruraning speeds that can be attained during vffpcak haur4, which would influence chc sclection of thc spced rJessgn , HorizonCal alinemens generally is sna[ the governing factor in restricting speeds on arterial streets. PropQSed impravements generalky are pat[erned to ~ the existing street sysdem, and minar harizontal alenemenC changes are com- ~ monly made at i n tersect ions. The effect of these ali nement changes i s usualEy ~ minor because operation through [hc tntc:rsection is rcguliiced by the type of [rafftc cvn4r[als needed fio handle the volume of cross and curnrng traffie. , Superelevativn may be prouided at curves on arterial streets but in a differen¢ ' manner or degree than an the open highway. The wide pawemenc areas, prax- " imity of adjacent deuelopment, contro l of cross slape and prvfiic for drainage, and the frequency of crass streets and entrances all cvmbine to result in pave- i ments vvith 1ow superelevatian. Likewise, the width of lanes, offset t6 curbs, prvximity of poles and trees to che traVeled vvay, presence of pedestrians within the right-af-way, and nearness of business or residential buildings, sin- g1y and in eambFnation, vften nulIify speeti characCeristics of a highway wiCh gvod alinement and flat grofiles. Yet, govd alinemenc and flat profiLes should always be strived fvr in the design of arterial streets, because safety and aper- ~ ating characCerpsCicS are improVed, particularly during offpeak periods. ~ Tapography can materially affect the choice of design speed vn arterial streets. Many of vur c'rties were deuelvped alvng• watercourses and include areas varying from gently ralling tv mountainvus terrain. The streecs origi- nally were canstructed with minar grading tfl fit the tapvgraphy. Because clne arterial street usuaily is developed tcr fit an existing street, kaoth through busi- ness and residential areas, it generally fvllaws a varrying vertical alinement. Once the design speed is determined, the proper sight distance shvuid be assured at all crests. Prafile canditions with lang, continuous grades shvuld aiso be designed with prvper cansiderahon of speeds of operativn ❑f mass transit and cammerciai vehicles. Extra lanes on the upgrades may be needed so that this portion of the raute can match vther portians in capacity and , enabPe vehicles that can prvceed at reasonabie speed tra pass slower rnouing Ve]711Cle5. ,rtt~eroila. s-re.t s shau,ld be, desi~nwd a d cvntre ! ~te~ri~~s r~gul~te-~cf, r~r~cre i n tM rVr~~g3U are aa pl~ic»at~~e f~r lc~acal aFild 1.31.111ec►I ar i~~e~s thrau~7h ce WFIR ~t~FIe a1r te ~al 44 owd~- buS-In~srs al ~ ~ ~i , + , _ - - - - . . _ . _ . . _ _ - - s~ - - u -v _ . ..se~ s a'~P.1►Y ~e ~igh-t~yp~ a~er•iaI"M -tt17 vutlFIng subUTrba~n_~r~as, For l~h~ arterial streets thrQUgh the crawded business areas, cvordina[ed signal cvn- tro1 through successive intersectians generally is necessary to permat even the lawer speeds. Many cities have substantial tengths of streets cflntrolIed so as to operate at running speeds of 15 to 25 mph. At the other extre,me, in subur- ban areas it is commvn experience on preferFed streets to adapt svme form vf , speed zoning ar sQeed control to prevenC hazardvusly high speeds. Zn these areas Che infrequent pedestrian ar vccasional vehicle on a crvss street rnay be unduly expased to accident hazard caused by thrvugh drivers gradually gain- ing speed as the frequency vf urban restrictions are left behind vr by drivers retaining the speed of the apen rvad as they enter the citY. ~lt~h = ~hvu~ t~ra -fic sh~u~~c~ ex =drted tv ~'~e exte~t f~a~~ble, r~ay b~ eg,ua l~y ' '~,ort~~~~ t~ ~tab ~sh a c~eilic~g speed tr~ r~duc~ ~aza~rd ~n~ ser~~ ac~cal Gra~ ic. ~one~ c~ ~5 ta 35 ~1, ph ~r~ cv r,~am, increa~,i~g rn 5- ~ph i~cre e~t~ as th cru e -te ~Is oa~~t~wra~cd t~c~ t~~e edg~e v~rbEd e Q~er~t. A pQSted rnaximum sgeed, as a matter af practicability in deterFnination and enfarcement, is nvt the highest speed that might be used hy relatiuely few drivers Instead, it usually is abvut the 85-percentile speed value deterrnined by abservation of a sizable sample af vehicles. Such a varue is within the "pace" or 1 a-mph speed range used by m,vst drivers. Speed zones cannvi be made to aperate praperly if arbitrarily deterrnined or selected. They must be consistent with conditions along the street and subject to reasanable enforcement. With runninp ,pee& nf ?f] to 45 mph it fn11nw5 that pertinent design speeds tor arterial streets range frvm 30 to 60 mph, I7esign speed for a majar - urban arterial h2ghway depends largely on the frequency of at-grade intersec- tions and the amount of crass a nd t urning traffic b ut shnuId generally be 40 to 60 mph Far the less important urban arterials the design speeds are svme- what iower. AIl elements of an urban arterial highwray should be designed far safe operatian at a speed of st least 34 mph. The preceding pacagraphs describe the basis fQr, and variaus considera- tians that need to be exarrazned when 5electing adestgn speed. IC is evident from this discussion that there are meanlngful differences between the design crrteria applicable to lerw antt hrgh design speeds. gecause of these distinct differences, it is necessary to establish certain iimits. For appltcation in thts pub&ication, the maximum limit Far low or Iower design speed is 40 mph, and , the minimum limiT for higYr speed is 50 rrxph. The resul[ant intermettiate design speed range (approxirr»tcly 14 rnph) could haue conditzons approxi- mating eEther tl7vse of high or ]ow desrgn speed. Such conditions would gnv- ern in [he seEection of Ehe appropriate criderla The specific basis for selection in the anterriicdcate range is discus4ed in Chapters 11I thraugh Vi1. 140 AAi,5HT0-Geametric Design of Highways and Street.r placed on the station fram which the vertical sight distance is desired, and the +t" strip is pEvoted about this poznt until the upper edge is tangent to the pxofile. _ The distance between the initial station and the station ern the prafile inter- sected by the fi-in. line is the stopping sight distance. The distance 6etween 4` the initaal station and the statian on rhe grofile intersecred by the lower edge of the strip is the passing sight distance. ~A simple sight distance recard is shown in the lawer pact of Figure 111-3. Sight distances in taoth dire,ctions are indicated by arrvws and figures at each statian on the plan and prvfile sneet of the prvpased highvvay. To avoid the extra wark of ineasurin unusuall Pon si ht distances that ma c~ccasional~ fs ~ ~ g Y Y be found, a selected maximum value may be recorded. In the example shown, ~ a11 sight distances of more than 3,000 ft are recvrded as 3,000 + , and where thTs accurs for severat' consecutive stations, the intermediate values are vnnit- ted. Sight distances less than 1,000 ft may he scaled ig the nearest 50 ft and those greater than 1,0}(] ft to the nearest 104 ft. The availatrle sight distances along a propased highway alsfl may be shown by vther methads. Seueral 'X: States use a sight distance graph, platted in conjunction wtth the plan and s~j^ prtafile of the highway, as a means of demanstrating sight distances. 5ight distance recvrds €or two-lane highways may be used tv advantage tv sy tentatively deterrnine the marking of nv-passing zanes in accQrdance with cri- teria giuen in the MLITC❑ 111larking aF such zones is an operativnal rather _t than a design probiem. Na-passang zones thus established serae as a guide fvr _ markings when the highway is eamgleted; the zanes so determaned should be c1iLcked and adju5tcd bJ field mLaSUtcmcnts before a(_tua] inarking5 af-c plaeed. Sight distance records alsa are useful on two-lane highways far determin- ing the percentage of iength of highway an which sight distance as restricCed ta less than the passing minimum, which is impvrtant in edaluating capacity. With recvrded sight distanees, as in the lower part of Figure I1I-3, it is a sim- p1e process tv detertnirte the percentage of length of highway with a given sLght distance or grea[er. HCDRIZQNTAL ALIIVENIENT "I'hearetical Cvnsiaerations 'mr Ed l~~~_ b+IetMrfiaz r~ed t~ pr~vid~ ~~fie, ~►~nt~~uc~aus a~eTat~i~n a° a.~eeci lI~f y Ga r~ cc- t he :=~n ea f ce~r~d~ icar~. d r t f~at h d;~;~hw~y ar ee[. F~r ~e ~ 17'l]"~ ti~ 1`~ ~CDCI Ef~rcru t~he ~:se ~ ~ [~G:~I 7 i i9.' ~ ~VGCi~~~ ~[Jf7 ~rU`1]. i r = 30 mph V= 40 mph V= 50 mph V= SS mph V= 60 mph ~ L(tt) L(ft) L(ft) L(ft) L(R) a O. R 71vo Four 71vo Four 'Iwo Four T1vo Four TWo Four D (ft) e Lanes Lanes e Lanes Lanes e Lanes Lanes e Lanes Lanes e Lanes I.aaes Q°I 5' 22.418 NC 0 0 NC 0 0 NC 0 0 NC 0 0 NC 0 0 0°30' 11,459 NC 0 0 NC 0 0 NC 0 0 NC 0 0 NC 0 0 0°45' 7.639 NC 0 0 NC 0 0 NC 0 0 RC 160 160 RC 175 265 1°00' 5.730 NC 0 0 NC 0 0 RC 150 225 .021 160 160 .023 175 265 1°30' 3.820 NC 0 0 RC 125 190 .024 150 225 .026 160 160 .029 175 265 2°00' 2.865 RC 100 I50 .022 125 190 .027 150 225 .030 160 160 .033 175 265 2°30' 2.292 RC 100 150 025 125 190 .030 150 225 .033 160 160 .037 175 265 y 3°00' 1.910 .020 100 150 .027 125 190 .033 150 225 .036 160 160 .039 175 265 ~ 3°z0' 1.637 022 100 150 028 125 190 .035 150 ' 225 .038 160 160 .040 175 265 ~ 0°00' 1,432 024 100 150 .030 125 190 .037 150 225 .039 160 160 y 5°00' 1,146 026 100 150 033 125 190 .039 150 225 - Dmax = 3°45' Q~ 6°00' 955 .028 l00 150 .035 125 190 .040 150 225 Dmax = 4'45' 7°00, glg 030 100 I50 .037 125 190 C~ 8°00' 716 .031 100 150 .039 125 190 Dmax = 6°00' O 9°00' 637 .033 100 150 040 125 190 ct 10°00' 573 034 100 150 .040 125 190 ti 11°00' 521 .035 100 150 12°00' 477 .036 100 150 Dmax = 10°00' Cj 13°00' 441 .037 100 150 y 14°00' 409 038 100 150 oo' 16°00' 358 .039 100 150 ;3 18°00" 318 .040 100 150 ~ 19°00' 302 440 100 150 ~ oo' Dmax = 19°00' ~ e,n„S = 0~04 14 D= degree of curve AIC = normal crown section A R= radius of curve RC = remove adverse crown, superelevate at normal crown slope ~ s1. V = assumed design speed cn e = race of superelevation Note: L.engths rounded in muluples of 25 or 50 ft permit simpler calculations ~ L = minimum length of runoff (dces not include tangent runout) In recognitioa of safety considerations, use of e. = 0.04 should be limited to utban Conditions ~ C-ol able III 81 Values for design el'e'm'e'nts relateci o• esign sp'eed and horizontal curvature. . . "t '-i. . , i ):•,r• s , . c 3p imph , V= 40 mvh V= 50 mflh Y= 55 mph V= 60 mph V= 65 mDh V= 70 mph 226 AASHTO-C;eametric Design of Highway5 and Streets - 4 .:icross slopes, there is less difficulty in returning the edges of pavement to a narmal seetian and 300 ft tnay be decreased. p..,. 8. The "hroken-back" vx "flat-back" arrangement of curves (having a 2 short tangent between two curves in the same dire:ctivn) shauld be aVvided except where very unusual tvpvgraphical or righf-af-way con- = ditions dictate vtherwise. Except crn circumferential highways, mvst 3 drivers da nat expect succeeding curVes to be in the same directivn, ~ ~ the PrePonderant conditivn of succeed'ing curves in apPasite directicrn r~v ~ deVelaping a subconsciaus habit in drivers for fvltaw'rng thern. Bro- ~ ken-back alinement is also not pleasing in appearance. Use of spiral transitions or a compaund curve alinetnent, wherein ihere is some degree vf cvntinuous supereleuaxian, is preferable for such conditions. The term br6ken-back usually is nQt applied when the cannectivr► tan- gent is af considerable length. EVen in this case the alinement will be ~ unpleasant in appearance when bach curVes are clearly aisible for same distance ahead. 9. Ta avaid the appearance of incansistent distortian the hori2onta1 alinement should be caardinated carefully with the prvfile design. General cvntrols far this coordination are discussed in the sectian ~"Cornbination af HorizQntal and Vertical Alinement." ~ ~ VERTICAL AGINEMENT Terrain -s. ~ ~ The tDpography of che land traversed has an influence an the alinement af raads and streets Topography dves affect horizontal alznement, but it is more . evident in the effect vn uertical alinecnent. Ta characterize Variations, enga- nee rs generally separate topeagraphy in ta three cI assifications according ta ter- rarn. : Level terrain is that condition where hTghway sight dzstances, as governed by bofh horizantal and vertical restricciQns, are ocneraliy iong or couid be = naade to bc so without canstruction difficulty or rnaaor exgense. h, n~ ~~rr~in ~s that con~lyti,~~n wi~ere th n~tur~1 a~n.1Ws c~nsi~t~e~~ly rase • Wib ~ ~ nc~ 1 belc~ 1-1171M , r ~ ~r~e a~ ~n~' where a~cc~asio -aI s[ -ep ' sl~ .e-• ~fFeom~ r~~~r~ct,i~n tnarm• 1 horiOontal a~rd UM7 3 ti_CKl rr,e t :2 Mountainous terrain is that condrtion whece lnngitutlinal and transuer5e changeti in thc elevzscion caf thc ground u+ikh rcspect eo thc roac# or titrcct arc i l:lc►rreirr.c 0/ 1Je.rrgn 227 abrup[ and where benching and sicie hFl1 cxcavatiarr are Frequently rcquired tcti obtain accepTable harizontal and Vertical alrnement. Terrain classifica[ion pertain to the generdl character of a specific rerute corridor. Rautes in valleys or passes or mauntainous areas that have all the characteristics of roads vr streets traVersing IeveI or ralIrng terrain should be classified as level ar rc,lling. ~e~,~-~a~l, rv Rin~.(g rain ~~5 ~~a t~e~ s ~ecpc~- r ~tiu•s LIa~~g tr~.cl~s to red «~c ee ~ h-[cawn c~rs ~'c'n : ec r~, a~nd mauntainous [errain aggravates the si[uation, resulting in some trucks aperat- ing at crawl speeds. Grades R+aads and streets shauld be designed to encvurage urtiform Qperation _ throughout. Use of a selected design speed as previousiy discussed is a mean5 tvwards xhis end by eorrelation af various gevrr►etric features of the road or street. Desrgn values have teen deterrnined and agreed upon fvr many high- way features, hut few conclusions have been reached on roadway grades bn q~' relatiQn ta design speed. Vehic1e-operating characteristics on grades are dis- eussed and relations of grad'es and their lengths to design speed are develvped in this sectian. 'AK' y4'` Vehicle-Uperatang Characteristics on Grades Passenger cars. The practiGes 4f passenger car operators with respect tv ~ grades vary greatly, but there is a general acceptance that neariy all passenger . cars can readily negotiate grades as steep as 4 to 5 percent wrthout apprecia- ble pass in speed below that normally rnaFntained on Ievel higfiways, excepc far cars with high weightlharsepower ratias, including same cQmpact and sub- ccampact cars. Scudies show that operation on a 3-percent upgrade, compared with that on the lerrel, has only a slight effeci on passenger ear speeds under uncongested - conditions. C3n steeper grades, the speeds decrease progressiuely with an increase an the ascending grade. C3n downgzades, passenger car speeds gener- a£ly are slightly higher than on level sections but local conditians govern. ~r nucks. The effect of grades on truck speeds is rnuch mvre pranounced than on speeds vf passenger cars. AWerage speed nf trucks on levet sectians of highway appraxirnaces the aVerage speed ❑f passenger cars. Trucks display up to about a 5 percent incPease in speed on downgrades and abvut a 7percent vr ~ nnore decrease in speed on upgrades as compared ta operation on the level. an ~ ~ 228 AASHTq--Geomelric Design of Highway.s and S1reet.s Elem ~ upgrades the maximUm speed that can be maintaaned by a truck is degendent primariiy vn the length and steepness of the grade and the weight]harsepower ; ratio, which is the gross vehicle weighC divided by the engine horsepower, ; Other ve'hicles that affect the average speed aver the entire length of ;grade are ~ the emtering speed, wznd resistance, and skill of the ogerator. The last two cause canly minvr variations in the average speed. Extensive stvdies of truck perfarmance hade been conducted to determine the separate antt carnbined effects of roadwap grade, tractive effori, and grvss vehicle weight (30, 31, 32. 33, 34, 60]. The effect of rate and length of grade on the speed of a typical heauy truck is shown in Figures I1I-27A and 11I-27B. From Figure I1I-27A it can be deter- rnined hvw far a truck, starting its climb frvm any speed up tQ 55 mph, travels up uarious grades or cvmbinatiarts of grades before a certain ar uniform speed is reacheti. Fvr instance, with an entering speed of 55 mph, the truck travePs 1,650 ft up a 6-percent grade hefore its speed is reduced to 25 rnph. If the , enteryng speed is 30 mph, the speed at the end of a1,[]00-ft-long climb is ~ about 16 mph. This is determined by sgarting on Zhe curve far a 6-gercent ~ ~ grade evrresponding to 30 mph, foa which the distance is 1,4043 ft, and pro- ~ ceeding alvng it to the poznt where the distat~ce is 1,000 ft mflre, c~r 2,44[~ ft, i fnr which the speed is abaut 16 mph. Figure I1I-27B shows perfvrmance when zhe truck approaches the grade at or below crawl speed. The truck is able ta , accelerate to a speed of 25 mph or mrare only an grades of less than 3.5 per- cent. These tvtal data serve as a Valuable guide for design in appraising the effect of trucks an traffic operation for a given set of profile conditivns. q Travel time (and, therefare, speed) of trucks vn grades is directly related ta ' che weightiharsepower ratao. It has been assumed that vehicdes of the same weightlhc+rsepvwer ratio have similar aperating characteristics. Hence, this rating as of eansiderable assistance in studying the perfvrmance of trucks. 1 Normally, [he we dghtfhorsepovaer ratio is expressed in terrris of grvss weight and net horsepower. It has been found [hat trucks with a welghtJharsepQwer ratio of abaut 30[} have acceptahle operating cFiaracceristics from the stand- point of che highway user. Such a weightlhorsepower ratio assures a mirnimum i speed of abau[ 25 5 mph vn a 3-percent upgrade. There is evidence that the autocnative industry would find a weightlhorsepawer ratica of this rnagnrtude acceptahle as a minirnurn goal in dhe design of eommercial Vehicles. There is ~ also evidence chat carrier aperatars are voluntarily recognizrng this rattv as the minimurn perfflrmance cantrol dn the loads placed vn Crueks of different power, the aVerall result beeng that weightlhvrsepvwer ratio of trucks gn htgh- Figur( ways has zmproved ir~ recent years. This is il9~zstrated 6y Figure I1I-28, which `~A compares such ratias as developed from information obtained in cvnaunctaon with nationwide brake gerfarmance studies condueted in 1949, 1955, 1963, = 1975, 1977 and 1985 The data show, for example, that Far a gross vehicle ~ , P r ~p~~ C .j ~ 434 AASHTO-Geometric Design of Highways and Streets Where a particular design feature varies depending on the area served, viz., residential, commercial, or industrial, different guide values are enumerated - for each condition. The designer should be apprised of local ordinances and " resolutions that affect certain design*features. ay Design 'IY-aftic Volumes Traffic volume is not usually a major criterion in determining the geomet- ric values to be used in designing residential streets. Traditionally, these streets are designed to a standard two-lane cross section but may be a four- lane cross section in certain urban areas, as governed by traffic volume, administrative policy, or other community considerations. For streets serving industrial or commercial areas, however, traffic vol- ume is a major factor. The DHV projected to some future design year should be the basis of design. It usually is difficult and costly to modify the geomet- s~? ric design of an existing street unless provision is made at the time of initial construction. Design traffic in these areas should be that estimated for at least 10 years, and preferably 20 years, from the date of completion of construction. r`~ esign Sp d~I Design speed is not a major factor for local streets. For consistency in design elements, design speeds ranging from 20 to 30 mph may be used, depending on available right-of-way, terrain, adjacent development, and other area controls. Im tfi ypioad s~ ree' g•~i~l Che clb'~et a~ed inte secGions l ly ~i~ ~i~t u _hicular pe - ~ s ~ ~ a ' ~ g ~ ~ . ~e , ~ . . , '~ttle sirnitficance. ~e ~igm speeds exceedin 3.0 mph in re i ential areas may requi~.re ]onger sigOTt i, ta~nc ~s anci inc~rTasecl cur•ve radii, wh ch wou1ld be-~c f ont.rary~~to th,e'~`b"asic~~ . . - - - - - ' - -nctionofa l ocal_; st,reet Sight Uistance Minimum stopping sight distance for local streets should range from 125 to 200 ft depending on the design speed (See Table III-1). Design for passing sight distance seldorn is applicable on local streets. ~ i ~ 467 ~ Chaprter VI C€)LLECTOR ROADS AND STREETS ~ ; iNTRODucTtON For purpQSes vf design, highways are classified by functian wEth enurnera- s ~ tian af des ign values for each functiona! type The Fol lowing guides aPplicafale to collector rvads and streets are presented vn a functional basis. Ti his chapter ~ will be subdavided into rura[ cvllectors and urban caliectors. A deFrnstion of the collector ean be develoged by referring to its upper and lvwer limits-the arterial and the lacal rvad or street. The collector is the road or sireet between these two lirnits. )r - Collectars also serde dual functions: colleccing traffic between lQCaI roads and arterial streets and proviciing access to abutting propert'res. Y The collector streets link neighborhovds ar areas of homvgeneous land use witln arterial streets. These streets serwe traffic rnvvements hetween arterial r~ and lacal streets and serve fihrough traffic within lvcai areas. Colleciar streets shrruid be plannec3 sa as nvt fiv disrupc the activities witihin the areas they serve. d In many cases tkaere may he na discernible difference between the collector and the lvcal access street wi[hih aneighkaoncood. The local access streec, - frvm a design ciassifieatian standpoint, is a local stceet that pravides direct ,r ar,cess to lvwer density residentiai lvts and is intended to serve the collectivn function far a group of access roads and ideally rot the immediate access needs af individuai residences. Hvwever, the collector street daes serVe the f , access- functivn fvr higher density residential development and for same neighborhood facilities. ~ The collector street is a pubiic highway, usually serving mvderate traffic valumes. Tv esCablish its own individuality, the design should reflect its spe- ~ cific status and should not be conceived or developed simply as acontEnuaus f . access--atrRpj., The collector road or street shvuld allaw access tv abutting properties cansistent with the 1eve1 of service desired. , The use of mQre liberal values af design dimensions than the minimums described herein is recammended rvhere economically feasible. In alI cases every effvrt should be made to get the best passible alinement, grade, sight distance, and prvper drainage tha[ are consistent wittt the terrain, present and grvposed develapment, and available funds. 4$0 AASH?'p-Geametric Design of Nighwrtys and S#r'eets a ensure that acc~~s points canfarm to the adagted standards farr safety, laca- tion, design, cvnstruction, and rnaintenance. K. ; y3 Q~ign "rl'$ffiC VOli1t11e,S Traffic volumes are a majvr criterion in determining the geornexric values to be used in designing urban collector streets. 5peciFically, the DH`J pro- ] ~ ected tv the (future) desi n ear should be the basis caF desi n. It usuall ~ Y g y is difficult and costly tv modify the gecrrnetric design af an existing cotlector street unless prQVision is made at the time vf initial corastruction. The design xraffic should be estirnated #'vr at 1east 10 years and preferahly 20 years firorn trle d3Ye Clf CS]t1SIFL1Ctifl17 Cl7I'tlp1et1@[7. ; r` ~ , DeSIgII SpC'ed a' Design speed is a factar in the design of cvllector streets. Far consistency in design elernents a minimnurn design speed vf 30 mph r,r higher should he used far urban cvllector streets, depending an available right-of-way, terrain, adjacent develapments and other area cantrvls. See T'able VI-I and Chap[er Ii, sectivn "Design Speed," for additional informatian. In the tygical street grid 1he clasely spaced intersectivns usually limit vehicular speeds and thus make the effect of design speed of lesser signifi- cance. Nevertheless, the longe,r sight distances and curve radii cvmmensurate with design speeds higher than the value indicated result in safer highways and should be used ta the extent practicable and feasible. Sight Distance Stvpping szght distance for urban collectvr streets should be in the range from 2(}4 [a 475 ft. I]esign For passing sight distance seltiom is applicable vn urban collectcrr streets See Tables V1-2A and VI-213. 5ee Chapter 111, section „Sight Distance.,, Crades Uradc:s aui ui ban Goilcc;tut aticcts should be as lc:vil JS ciy1I1SlSLl:611 witti llic surraunding terrain. A 0 30 percent grade is acceptable to facilitate tlrainage. Memarandum Date: January 8, 1996 To: File From: Ed Parr~4 Subject: P1750 - 5helley Ieake P.U.D. Tersraia Clasaificatban 1, In respvnse tD IPEC's letter ❑f 5 Januarry 95, r analyzed the existing terrain cantaurs al❑ng the CL prafile of Rfltchford Drive, and discussed the terrain classification along the route of this road with Bill Hemmings. This project is governed by the 1981 Spakane County Raad Standards. 2. Based on tY115 analysis, i't appears that the majority of ths raute should be classified as "flat" ; the area between stations 17+00 and 23+00 eould be classified as "rolling" This was the recommendati~in t❑ t~ie Caunty Engineer. ~ ~~W ~""16 3. 1 also discussed terrain classification in the area of the intersectian of 4th Avenue and Rotchford Drive with Bill Johns. Given the histary of discussions on thi,s project, a I]esign meviation Request fQr a horizantal curve less than that required far a Collector Arterial on flat terrain could be granted if zPEC were t❑ pxvpQSe an acceptable degree of superelevatian, as well as speed lima,t and warning signs as part ❑f their request. Ta date, IPEC has on],y requested that a reduced radius on the hflrizontal curve be allowed, withaut any mitigation measures A I ~iA ~ INLAND PACIFIC ENGINEERING, INC. A,ugusc 21, 1996 I.P.E. #931 43 Spokane Ccaunty Planning Department West 1026 groadway AVenue Spnkane, WA 99260 ATTN: dahn Pedetson RE: Shelley Lake P.U.D. (PE-1750) Adzninistrative Change to Conditian of Approval Tohri, This letter is a request fvr an adnunistrative change to the eonditions vf approval for Shelley Lake P.U.D.. More specifically divisian of eragineering & raads condition #40 calling for the intersection af 4th Avenue & Cot3klin Raad be aligned sv as to prowide for the pvtential aligmnent of 4th as a fvur-way intersectian. We wauld like to ask for a modificatiam of this cunditian to allow Fvrarth .Avenue to be an offset intersection as sharvn an the attached drawing. Aisv attached is the requized fee nf $562.00 to pracess this request. If you need any rnore information vr clarificativn, please feel firee to contact me. Sincerely, Inland Pacific Engineering Campany . : Todd R. Whipple, P.E. TRW;cf Enc. 93143Vpcdusop wpf 703 West 7[h • 5uite 200 2020 Lakewemd ❑rive + 5uite 305 5pakane, WA 99204 Coeur d'Alene, ID 83$34 • 504-458-6840 • fAX 569-458-6844 208-765-7784 • FA%. 208-769-7277 P ~ JAN-09-19% 17 :12 T NURND MC I F I C EI%Q P. 01 1 MC PNLA►ND PACIFIC ENGINEERIN'G, INC. ranuary 9, 1996 W. O. No. 93143 ~ . Po" F 7~ t Daw ro ~mm Spvkane Cvuniy Public Works COM7 G°` W. 1426 Brmdway Pharo r ~pokaller 99260 Fae # `FaxR 4 Attn: Fd Farry, P.E. Re: SheiTei* Lake - PE,1750-94 Rotchfnrd Drire, Design peviation Ed, Per yvur phone r,aI this aftrnoon, I azn of the undefstandinz that not alt af the shelley Lake plat bw been deter~ tO be classified as ralling ter.tain. Therefflre, I wouId Uke to modify my opening statement to $ill 7vhns iri a Petter to him yesterday Ca anfer that within acertain area vf the ShelIey Take plat the rallirig tenain classificatinn will a,pply. The speci~ic limits nf the terrain classifcation will be delineated vn a ntap to 1e placed in bvrh TPEC's and 5pvkane Cvuraty's files, this delirieativn wrll be agreed nn at amftting tv be held at a latter da[e. PIeaSC c3I1 Me to schedule a meeting to fuali.ze this issue. Sinmety, Inlani ac,ifie En 9 Co., Inc. Todd R. Whippte, F. E. TRW/tw enclasutes cc: Landmark-BniIders, Fusw Heitman file 707 Wast 7th •Suim 200 8020 faktwaad 0►ive • Sntcs 205 5POWrer, WA 992[}4 Ccxeut d'Alsne. ! Ll 836 4 a 5{39-458•6840 4 FJV[: 509-458-6844 2[SB•765-778+r • FAX• I08•769.7277 i~ I I r . _ INLAND--PACIF1C ENGINEERING, 1NC. - - - ~ July 17, I996 W.O. Nv. 93143 = - - - Spakane Cvunty Fublic Warks W. 1026 Broadway ~ Spokane, ~VA 93261 ~ Attn: Ed P , P.E. lte: Shelley Lake - PE-1750-94 - 4th AVenue and Gonklia Raad Dresign Deviatian - Cla~ificativa 17ear Eci: Enciased is the original of the plan shaw'ing the contours for 4th AVenue fvr both the super-elevated roadway and the crawn sectivn options. Per vur meeting Coday with Bob Bruggeman we decided that the super-elevated sectiQn as designed to a Z-percent super is the design of chaice as it will provide the greartest driver corn£art around this corner. Please add this sheet to the design deviation as xt is passed around for signature Fiease call with any questions at 45$-6844. ~ i SlI1CL'relyr t ~ lr~l ~fi Paci Er~ 'neering Co. Inc. t~~~ ~ Todd R. ippl*eE. TRW/tW eI1CloSure5 cc: Landmark Builders, Buster Heitman file nx ~ . JtIL SPO#-t;+t ~;~Fr• r ° ~F~• 703 West 7th • Suite 200 2024 Lakewvad Dride • SuitE 4.;J" I.~ e:~~NEER ~ 5pokane, WR 99204 Ccreur d'Alene, ID 83814 509-458-5$40 • FAX 504-458-6844 208-755-7784 - FA?t: 208-769-7277 ~ 1 t ~ ~ ''i 1 ~q ~ ' ~ . S p C3 EC A, N V-- DFUrsioN OF rFnac[NEErtrNc nNr) Ro,aDs ■ A DratsioN caF TwE Pustirc woRxs f]FPARrMEN7° WiIliam A}ohns, E,Acting Cpuntp Filgineer fJenczis M StQtt, P E, Director NQVeCTlb€:C 27, 1945 Todd Wfxapplc, P.E. [ PEC SUBJECT: F1750 - Shelley I.,aice P.U.D. i;radcng &Erosion Gontrol Plan ' lst Review Genelemen: A reView of Che road and drainage pEans far this prvject has been accvmplished. Areas af concern tv us are intticatecf Fn red on the a[tached prints. Please rnake the cvrrections and resubmit them [ra this flfice in order that the revaew pracess may proceed. When the Dlaris are resubmrtCect. niease mark all chanees crn the revised nrunt in eolar, in addittvn, please prcruide an information ctapy vf any utility plans fvr this projecC. !f yvu have any questions aRaout this review, please contact Ed Parry at 456-3600. Thank yvu. Very truly yvurs, RECEIVED Willtam A. 3ohns, P. E. MAR 0 1 M6 Spokane Caunty Engineer SPOG4NE CQUNTY ENGfIVEER E4dw a ~ ~ Pa r. , P E. R ~ Plans Review Engineer - NO',, ) 7 100~, encls: Plans (1 sec) Cvmmenis (2 pages) r-•-- ' • ' - • __..Y:~ Standard 1Ycs[es cc- prnject File reviewer {cornmsnrs vnly} 1026 Yd $raadway Ave • Spakane. WA 49260-0170 •(509) 456-3600 FA?f (509) 329-397$ TL7U (504) 324-3166 . : ~ ~ ~ 1 ~ ~~MMENTS 5f'QKANE COUTdT'Y I]IV15[OP+f C7F CiVGINEERfNC; & Rt}AD5 1026 WBRf?AQWAY, 5PQKANE WA 91260-0710 Pi-fONE (509)456-3600 FAA (504)324-347$ FtE'WIEW 1 REVTEWER: Ed Parrv FROJECT P1750 DATE• 27 NoVember 95 PRC)JECT NAME• -SI,e11cv Lake P.U.D. GradinLa & ESC Plan GENERA L .C Future submittals must be stamped, 5!g[7Ed aI]d CIaLe{E by a W35h1ng[Q1l Sia4e-l1C.eIZSed PrClfe5S1fJi1aI EIIg1 f1eeC 1M,. C]evclnper's signature is needed priQr ta Caunty Engineer's approval 3. Need Cv cvordinate with the State Fisl1 WildEife Dept. regarding reguoTements for an Hydraulic Prvject Applacacion, primr to County Engineer's apprvvaa. 4. Need to coordinate w+ith the Cvunty FlQodplain Administrator pritar to Coun[y Engineer's approua] i /1A11L1 1. Worizantal curve data was nat indicated on this plan 2. Tangent bearings Sc distances were not indicated on this subrnittai 3. The verticai curve lengths at a. 12 +(l0 b. 19+25 c. 23+f]t] d. 32+Qd} c. 35+60 dQ not provide adequate sight distance fvr the raad classificatian, [errain, and grades inrvolVed 4. The attached Stanclard Nvtes need to be incorporated inta the next submitcat 5. Straw bale barriers are usraally considered efFective on1y if a. The upstream area is less than acre per 100 LF af barrier; b. The length of the upstream area ts 100 €eet: and c. The slvpe oE the upstrearn area is 2 H:IV ~ ~ RFVIEw coMMEN•rs ~~ge 2 of z 27 Nowember 95 PROJECT # P1754 - Gcadine & EnSC nlan REVIEW # 1 6. Straw bale barriers tieed to be entrenclied at least 4 inches rnto the grouizd, aiid the soil upstream of che Yaafe needs to be cvrnpacted 7. Some means of keeping mud out of 4th Aaenue and Cankain Rd needs to be prnvided 8 Frosioll co«troC plari rieeds to address a. Liinits orr amoune of disturbed area b. .L1tTi115 C1i7 IeCBg1h of L][71e d15ii1Cbea afe35 Ca11 bC IeFi u115[ablll2ed c. Stabilixatiran of stockpile and spoii areas d. Maintenance requitements for erasion caritro] measures 9 Iuimits of disturbed area needs to be indicaced ara plan 10. L.arger areas typically need svrne sort of sedirnent trap or sedirrsent pond. If iieeded, calculatioiis need to be provided with the next subrrritta] 11. ESC plan needs ta prevent sedrv-nent-laden runvff frarn running onto [he parcels tv the wese of the westerly ptat baundary 12. Nvte 11 needs tfl be cvvrdinated with the grading plan. How ean the coiitours i►ldicated be constructed wittiout extending vutside the piaC bou«dary? 13. F'ermaraent slope easements fvr the Rotchfard Drive grading neetl tm be provided prior to Cvunty Eragineer's approva] of the grading pCan. Easements shauld exCend to at aeast the catcli point vF cuts vr fills needed for flrtished grading & paving of the Rotchfvrd IJrive alegnment 14 Proposed ccantouzs in the vicinity of 4th Auenue need to he coardinated with the extsting contours on 4th Avenue How can the 2036 (prvpasecf) contour ca[ch the 2025 (existing) contour? 15. Prop4sed catitvurs in general need to hit a catch pvint at Cha[ erevation on the existtng tapography How can 10' fills just end ai Che westerly plat limit? T11e WSDOE "Puget Sound Mai7ua1 ° arld the Co-op Ex[ensicrn are good sources of infvrrraativn about ESC measuces and duratiranlextent of dis[urbed areas ~ '4i H~ • • _ Standaxd P[an Notes fnr Llevelnper Ptan 5ubmittals ~`!'iZC Cnntrac[«r is requ9red to have a cnmpiete set of thc approved gradmg and erc~sion control pians on the job site whenever construc[don ts in progi-ess / Frtor to site eanStruetion, the Cnn[ractor ds responstble fnr locating undcrgrnund utilities Cali Y the underground utility ]ocatiori service at 456-$000 before you dig. 5tandard Erosion Contro! Nvtes These notes are to bc: incluc3ed in che pian set when erostosi control facilicie% are required and incorporated into the plans 1} An ErosionlSedisnentation Cantccr] (ESC) pPan is reyuired fUr this prvject Implementatson tai thc ESC plan, and eonstruction, maintenance, and upgrading of the E5C facili[ies are the eesponsjhtlity of the C7eveloper until all constructin;l is completed and accepted by Spokane Coun[y, nr untcl vegetatian is establtshed throughout the srte, an[i aceepted by Spokane County, whichever is later 2} Appraval of ihe ESC plan does na[ consti[uCe approval of any of thc prsapased road, storrn drainagr:, grading Qr utility design efements shown on the ESC plan. 3) The erosinnPsedimentaiton control measures showra are the minimum reyuirements for the anticipated site canditions. fihe Contractor shal] ir►spect and mainta,in tliese E5C rnc;asures daily, and sdiall maintain and upgrade these measures as necessary tD preaenC sediment-3aden wa[ee frc}m eicher tlowing of-F the site, or into newlexisting storm drainage faciliries. 5uch a5 cfrywelis, eulver[s. (ir gravel galleries 4} The ContractorlDeveioper is respansible far insta[ling Rock Construction ~.ntries at an}+ and al[ locatians used to enter ar exit the peoject sEte. ~ ~ P` . ~ i .a ~ ,5 P K ,k iv E e) u rv -r -Y IJIVY5IC7N OF ENGYviEERiNG aND RC3AQ5 • A I71VISIL7hf C3F TFfE I'UBLSC WORKS i]EPAItT:1+FENT William A. Jahns, P E, County £ngsneer Dennis M. Sccztt, P E, I3srector May 15 , 1997 Tlm 5chwab, P.E. iniand Pacific Engineering 707 West 7th Avenue, 5uite ?Oa 5pokane. WA 99204 SLJB,ECT: P1750 - Shelley Lake P.U.D. Plan Change #2: Cvnklin Road guild-out lst 5ubriittal Genrlernen: We have condurted a cursory owerview nf this submittal. We are unable eo accept rhis submittal for rev"sew at rhis tune for Chese reasons: • The plans and calculatians did not bear the svgned, dated stamp of a Washingu~n 5tate-licensed Pcofessional Engineer • The plans did not bear the Develaper'S appl'DVal SIgnai11Ce. • The road sactian does nat conform to that section shawn an the ap,proVed plans for this projecz. Thac sectaon indicatf.s rhac a sidewalk vvili be constructed on rhe west side of Canklin Road. Pfease cafl to discuss the loeatiaan af this sidewallc, pardeuiarFy a5 i[ crvsses the future a,lignment af the South Va11ey A,rterial. Existang arsd new R1°VV [imits shauld be shawn, as well as the drainage easexneni limics, as a rninimum. This is nvt int,ended as a any sort of a complete list of the items needing attencion in order to canform to the Couary Standards. P1ea.se ensure chaz future submittats have been coordinated with the CQUnry 5tandards as weXl as the detads from the apprvved ptan set. Ef you have any questivns about tiis reView, pTease eontact Ed Parry at 456-3640. Thank you Vep}r uvfy yours, WflTiafri A. ,6hns, P. E. SpOkarie COllL[iy+ Ei1g1S1eeF Wn1~, 6v,►L&evi 1(_. ~ k,-~ ~davard , Jr-., P.E. Plans Revie4v Ergineer eacls Plans set) cc. prffject file ret+iews"'.1989"y~lle. • Sgaleane, WA 94260-0170 1 (509) 456-3600 F'AX- (504) 324-3178 '1`DD (509) 324-3156 Develoger: Bus[cr Heitman, Landma.rk Builders. 8205 NnrFh Dtivision, Spakane, WA 99208 , I • to INLAND PACIFIC ENGINEERING, INC. May 9, 193? W.O. No. 93143 R~~El Spakane Gounty Public Wvrks Mg 1 3'1997 W. 1026 Broadway = Sgakane, WA 99260 PQ~%j CguNrf fNGtHEE i Attn: Dean Franz, P.E. Re: Shelley g,ake PUD -Plan Ctange and ReVised Drainage Calculations fvr West Side of Cvnklin Road I]ear Ed : The gurpase of this letter is to revise the T7rainage Technical Repart far the 5helley Lake PLTU P1at, dated with revisivns June 1996. The approv+ed plan is being revised an the vvest side of CanMin Rvad ta mirror exactly the east side of Cvnklin Rvad. Pr'evivusly, the canstructivn of khe west side of Cvrilclin Road was apprvved vvithout curbs and gutters, with sCormwater allovved tQ sheet flow vff the road. The cor►strucfiian of the east side of Conlclin Road vvas apprQVed with curbs and gutters, and stcarmwater was directui intv a swale parallel tv the cvad 1ay curb drops appraxirnately every 100 feet. This prapvsed p7an change would construct the west side of Cvnclin Road the same as the apprvved east side of Conlclin Road excepC for a sidewalk will anly be canstructed vn the east side of Conklin Rvad. Aten fvvt strip west of and adjacent to Conklin will be dedicated tv the Caunty and aiaother ten faot strip adjacent tv that wouid be set aside as a utility easement. The west side of Conklin Road wi11 mirrpr the east side of {Conklin Road except for the sidewalk. This pvrtivn of Conklin Rvad is Dn a tangent, widths frvm centerline and superelevation are the same, and Iocation of curb draps and swale sizes are identical. The location of the Type B drywell on tfie west side will be altered slightly tv avvid utilaties. In the Drainage Technical Repart, the east side of the road is labeled as basin "V" with pond "N" and the west side of the road is labeled as basin "VV". Attached are capies of applicable sectipns frvm the I]rainage Technical Report showing the calculations for basirr, "V" and that these are now alsa far basin "'W" . Flease calI if yau have any questivns regarding these changes to the drainage at Conklin Rvad. Sincerely, Mand Pacific Engineering, Tnc. Timothy A. Schwab, P.E. 'I'ASltas cc: Lar►dmark Builders, Buster Heitman 707 WeSt 7dh - Swte 2[[10 2020 Lakewaod C]rive • Suite 205 Spokane, WA 99204 Coeur d'Rlene, Iq 83814 509-458-6840 • FA?C 509-458-6844 208-765-7784 • FAx 268-759-7277 ~ • a r+ f r 4 ~ 1V l~ . ~ . • l ~ W ~ • I f Z03 Fi 13 . ~ f- • • ' ' 252 l4 . , . ~ia . ~ . . •a a• ~ ° ~ 1.,. Pra~ress ~ p ~~~i ~ o'~d•.. . . • Sch ' 2031? ~ . ~ • • . _ • o ~ t a ~ ' ~ • 2aZ9 ~ ' . • + e . . . . ° : . ■ . . . , . • . ; - _ . ■ • ~ • ■ '0~ aWEIY _Vf1L1.EY • . . • •q• •r~• ~ ~ 0 6^! ~ • o ° ' ~ JP Hfgt1 I . a i - • ,f ~ a ~.lo i. • `.SCh -In Jv 10 VCi1 adale ~ I ~ , . y . ~ . ~C ~ t'~• ~ti. ~ ~ ~I4~. 1'4 + • Y ~~J . ~ ~ ~ • a • • • • J ~__i y! L`~ y6 L.4 NF . •ri.•~ ' . ' ~,}G 41 t~►vE ~ _ r p. ~ ~ r . 'r ~ LI I • . . . : . ~ f ~~-~-c~ ~ a r ~ ~ . ~ ~ ~ ~ •e ~ ~ rv C ~ 4 6• o_ o V y o~ ~ ~ ~ P M_I LVVAU~CEE I: ' I~ST PAIUL rSr • ~c PAClFlG ~ • • ' ` ~ Vera: , ; ~ • ~ - ' . rr ~ r ■ i ` ,e, tFa77 I~r 1. 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ST ~AVL ANL1 •MfLWR[IKEE L :S , ,~JIri' ~ . '•l~ . : - , . • ,MVeradale. , • ~N~ . ~ -Y.".. ` , y[nB • ef ' I~ i 1, t*sa '~4i~ [a. " ~ • a ' • ~ ~ iLiG . ,,yy ~,d~y ~ } • ~ _ , G&1q ~ . ~ • ~ i r GmE ,P',mg . CkC , Mc.C°`?~- ~ ~ . A • '7~ ~ •~i 1 C ~'S f1 CL'1911 ~l~ V1 LH ,L PCA W~4 ^ v'~' • .""P ' • ~.~T.4~1C1ry~ • ri 1~y •1 s ~ i GRSEj k •.d9; •M. I 3 PfA , - . cr • i Z/V `a Cc~ Ht$ , We SITE x + we SZ E GmB o ! Hs9 BsB • _ UhB " PsA LBB _-8sFi ~ psA HvC • ~ ry~ FsA La8 + ~ ~~••~i ' • • ,j,rP - ~ . CnB f ~ • ~ y _ _ • r ~j~,~,`f~ Llh9 ~.3s~• - ~~kc. cOa 'r- , ~ . . • _ ~ yBg~ .o . ~ 1 . a~~d,•~ yd'k { , • ' ' ' ~ G8A ~ p TE313l9 v~• ''1~ ' - 11 r•.e1~GFR$ ~ $0S ~ , ' 4 4~~~ ~•~,1i '^.:y.'' .~,°s`_- ~ HIB ~B .+►9t8` • ~ ~ ' ~''-►L~~ Cv' n ' f - f. Mnn Rss r~ • • .41 1 %i . ~~y " • ti . \ ~ ae~ r r. ~i~•t~{ ~ ~ Bs13 iGgA HhA ~ ~rc~-ff a 9. ~ • r ° GR143 ~Cu@ t 3 A ` ~'t CEGENm: ` 4" Q. SuE 44A Ciariiscn yeavelly Ioam, O ta 6 paroent rEapae ~ ~ Gg$ Kiarrisnn 4ravellY Ioam, 5 to 24 Psroent slopes • ~ ~%r~-~'}~ t•~ Gm8 Liarrisan very qrevaEly IQem. O xo 8 percant slopes ' ~ : - , .f' ,Y Stc Spokane vrory rocky campiex. a to SO peecane slopes SuE 8pokane axtrama1y ror,ky complax. 20 to 70 peroent slopes ~u . " GmLi II ~•,i.. f W ;OURCE; SPD1(AA[E C011M11TY SL71t Sl1RVE1f MANti1AL 7ATE: .iANUAFiY 1994 ~ SCALE: '+iOTlE FtGIlRE 140: ,app.lECT NO.: 92-032 SO1LS MAR 6 SHELLEY LAKE PRELIMfNARY PUO PEAT ' ~ammCTq:i:iQCt[LtE!., -qi2.C. EWVIRdNMEAIT►4L IMRACT STATEMFNT Table No. 1- Pond and Basin Susmmary - : - - . ~ . _ ~ . - , , - ; - f,- - : ~ : - ~-7~~~ ; _ " ' " ~ Y= . ry~~ Zq~ ~'3~ ~.T.z rr:. ,.µr a•. ti~`_~;f,~, c1 1~'_a:i~'1~:N~~+?~~~~'~1-.~_~_._s~~~~i~.~~•''~:.,__.i~~;-.u_.4-,~~.~.:Yf, ~54a +.~';r~~as~ ~;,•~x 4 ; _RrX--. 3---~ - V ~ w.- - .aoN.aau+ - €5 ~ _ ~ • ~r~ f. • ;~,~'ani~;. ' ,-r _ • - a : E Area ` - L~~..,~'~.~~.a-::_~•:E x ~i~ p A ~ 99755 ~ 18170 ~ 0.2866 ~ 2.29 B ~ C A 42412 ~ 13145 ~ 0.3825 • ~ 0.974 c ~ D I 178405 ~ 30550 0.2784 ~ 4.096 . T3 I E,F ~ $6260 I 13595 0.2682 ~ 1.984 E _ I I_&;C?'~' I '487~ ` 9~1>:S4 ~_t134 ~ F ~ 7 I 5950 ~ 2335 ~ 0.4443 ~ 0.137 ~ E&F I i,J &~.U~ffs~3 ~ 68t338 I 0.4,I2i]r 109 ' G_l: V ~li I E1~2418 4007i 4,3 9!:1~8 : , I LO7;~&, ~:29~11~ ~53 71 6~2 2 32 y y 21~1.6, ~ ~~~,~5 ~V N Q-6-142-6- 1 O~~_94 I ~ x 28221 ~ 14567 ~ 0.5371 ~ 0.648 H,Ivt,43,Q,H f 3 M19-0' &g-Z 7~2D1Ti pC s ~ 20080 ~ 6714 k 0.4008 ~ 0.451 • ~ ~,;,~~1'~ ~..i~i. $8 Q}~-5 Rf `1~ ~ ln! 11,0532 457D5 fl.862k ~1~3'Sa 161 , ~ ~5 al~l',4~3~ ~~"1 ~ ~9 1~ ,k' T~rr~pA ~-feirinl~(L~~, I 291'3J ~•~~G Note, Basin A-Temp has 14593 sqft of graael @ 0=[).50 per SCSWM~'a =wnte;.Irnper ~nus,ar,.eanincludes,~cur8~gutter;YsidcwalIc;~n~d!►aspl~alt~pa~~ng<~ ~ ~ ~ I~ Inland Pacifrc Engineering Gompany D4 Shedley I4ke Plat I3rainrlge Report ~ Table No. 2 - Pand and 20$ Sasin Summary r 71 ' , ' •;~,•,r:s~ ` w °rt?Y= t r ~-Y a~.r.r; • : x;;c~~;;; „,_~'.ix ~ ~ . . . ' ' ~t-r; ;~1.~~~'f~ ~±#l~~~=~~,~1c..5"I~~~ 1 t 1 r ' b T.:~°~'~~s;•. . E •'P ~we;_~.«r-.~ .y.'-, _,v,~..ww*~~ 6..,y~ 'ai ~ s .a~3-,.x...~i..a.., v..w~r'y eH`lr-., . a~ . ,y~ s.-..m,qr-•;.~+ a f' •~p !Basin, ~ ~ ~~0~ Ya~ n~f.,~ ~ ~~~~:~~~r.,ea~ : 208~~►►~~a~~. uMOP"dK±~c "r~TT~egLL~r~ti~i~.~~ aP'r.o'yg~ J, ~'r.~_'~ ~4E~ ' ~`s.T%!;`wK..~ c:~ [T-~., w~~~ .'s c._ i-:. w.,~"~Pw~ • . . . . 'j, A A 757 1514 1905 1$ B G 54$ 1096 1285 lA ' c D 1273 2545 2933 1B ' D E,F 555 1139-0 0 1516 IB E&F I,7 8c ~lff,,~3p~~ F®R, 09 - 2'069! i cO : ITS ; 002 GZ ' 8~2~ 3:64~ 3.. `.~~7. L~ H IV 1 A I x 607 1214 1354 lA ~ H3`"")03Q7R ~ 5.ilY ~~..7 ~3~~ K S 280 550 560 lA UY2~ ~6'4i4 ~M W111 aN ~8 °7►~5 NO ~'e~np p Ternp A l Gi~B, 2:,~6 '-0 1 A _ ~ ~ p P ~'7~ ~ . O4 960' IA , Type A is a 5pokanc Standard DryweI! - Single Depth, Capaciry 0.3 cfs - Type S is a Spakane 5t.andard arywell - Dvuble Depth, Capacity 1.0 cfs = 5wale, see swa9e vofume sgreadsheet for vofume provided calculativn _ -,+'re ' • ' iq ~ ~ 54*Y,~ea~~~I vw ~ac~~~I~1~cfs~c`omhAned xwi th~50',~ Iun~~c~r.cam,~as~tovb a sln:of,L6~7r~T~e:total+~r~I q ~"Wt r-av' y=3 Y"'.' .>°a~s•`a'~'' l.' .i-4 , p-E?:~r8~~sis'~~;fl33j`~ef at l~~~fc~t~'~eP ~.'a~d~I,62~fon~f«demf~ ~ .,the v~lu~n~ prayici'jillFal'lnw fo~'a 50= ~ e eu i~ }i`'~tvtal ~~Iu'i`'ne v~ ~ , a Inlarud Pucif c Engineerang Company Ty6 Shelley Lake Plat Drairage Repore ~ , Sheiley Lake, PUD Runaff Coetfcient Ca[culativns Basin I Tvtaf I Imperul G" I Sum Ac ` A ~ 997551 181701 0.2866I 2.290 R 1061011 317161 0.37421 2.436 c 424121 131451 0.38251 0.974 D I 178405 1 305501 0.27841 4.096 E I 311651 65651 0.3480I 0.715 F I 550951 7030 0.24571 1.265 G 1 I 124281 40071 0.39181 0.285 G2 I 232711 43781 0.29111 0.534 ~ H I 281701 6888I 0.3334 p0.647 x; I I 273561 215501 0.7448I 0.628 J I 59501 23351 0.44431 0.137 K I I 01 EfZR 0.000 rAmhined with P m I 84801 ; 12863 0.2638 1.947 " A N ~ 21976: 14580 0.6476 0.504 D 1 333701 71 70;0.3'I 11 0.766 P F 490451 11438 0.32491 1.126 Q I 602121 186751 0.38261 1.382 R I 1074001 205761 0.29371 2.466 s I 200801 67141 0.40081 0.461 T ~ 10E70~ 101371 0.86251 0.245 vt ~nII I 16532 157051 0.86251 0.380 ~..__:ig:LAr-461~7 I`- h3l W. 648 Uff A I 538351 01 0.15[]01 1.236 off B I 175161 01 0.15001 0.402 p Temp I 29139I145s3! 0.3253I 0.669 Tota9s I 11949651 3370221 0.36151 27.433 . i r~~~ . m ' Shelley Lake, PUD Pond and Basin Sumrnary ~ Pand I Basins NTotati N Irnperu 1 C I 5urri Ae f A I A I 997551 181701 0.28661 2.290 B lc l 424121 131451 O.38251 0.974 ~ C D 1784051 30550 0.27841 4.095 k: p E, F ~ 862601 13595 0.26821 1.980 ~ 1I&Off B 1 44872 215501 0.51421 9.030 ' F 11 I 5950 23351 0.44431 0.137 E&F 11,J &off g I 6$338I 238851 0.41211 1.569 ~ G2 G2 1 232711 43781 0.29111 0.534 ~ . H hl 1 219761 145801 0.6476 0.504 ; I - iX N 26221 145671 0.5371 0.648 ~ J I H,M,O,Q,R I 313953 661721 0,30819 7.207 . K I s I 200801 67141 0.4008I 0.461 A Terra A temp I 291391 'C 4593 I(7.525E I- 0.669 CI qGl 1 124281 4607 0.39181 0.285 I L fl~, A~~436 ~ IU,1`. . ~ 46 98 43888 0.862+5 Dr," N I V~. v/ 1 16532 15705I 0.8625I 0.380 ~ A 1 2A, ra ~ i I i - II~ 1 ~ , P~ ~ . - - ~ Shelley Lake PUi7 IPEG Job No. 93343 Ti his forrn is based upara 5ection 5 of the Spokane County Guidelines far Stormwater Management Sv+rale Volumes for ' Conklin Road and 4th Avenue Date 06127196 Engineer TRW . Gonklin Raad [Riqht S~rale] & 4th Avenue Sta#ioninci FromlTo Slope Depth Bottorn 5ide Sectianal Volume Leve4 Volume Volurne Beginning Ending Widfh Slope Areallf Flat Paol Ltg On S[ape Used by {°Io? {ft} (it) i ? : 1) (cfift) fEL (ft) {ef} 51ope(cf] 4th Avenue 650.001 700.001 0.00 I 0,50 I15 00 I 3.00 I 8.25 412.5(]1 50.001 206.251 412.50 700I 750.001 0.00 I 0.50 I 1500 I 3.00 I 8.25 412.501 50,001 206,251 412.50 ►5o I 800.001 000 I 0.50 I1500 q 300 I 825 41250 50001 206.25I 412.50 aaava I 850.00 000 1 0.50 I15 00 1 3.00 I 8251 41250 50001 206.251 492.60 I I I Volume as Flat (cn I165000 I I I ludiurne on Slope [cf) I -I 825.001 I lVofume Praaided (cf) I I I1650.00 ~ 1.1~ 9~ _-1, k I I I I ~•I J ~ Y I 1.~-~ _I I I I Conklin 9-r Sl - 1 I ~ 9 I I ~ " y 4345.00 4445001 0.80 1 050 1.50 1 3.00 I 1 50I 150.00I 62.501 4e.88 1~a v~ 4445.001 4545.001 0.80 r 0.50 1.5~1 1 3.0~] I 1.5#~ 9 154.CDfl 1 52.a~3 q 45.88~ 5D.[)0 4545.Dt1 { 4645.001 [].$[1 f~ 5Q 1 1 5L] 1 300 1 1 501 150.001 62.50 46.$8 ~ 5~.a~ 4645.Df~ 1 ~4745.00 1 (~.80 0.50 1 1.50 1 3.D17 4 1.50~ I 154.001 62.50 46.881 1SD.Ol7 4745.00~1 4845.(101 ~Q.B0 1 0.50 1 1.50 1 300 1 1501 15t}.a01 62.50 46.881 150.00 ~ I I 1 9 I I I I ~ I I I I V~slume as Flat (ct~ 1 750001 1 ~ volume on slope (cO I I ~ 234381 I~ I IuQlume Provided [0 I I ~ 75000 I I ~~I { I I I I I I ! L~ I I . • If ; , ~ BOWSTRiNG METHC]Q FR~JECT 5he11ey Lake - PhaSe 1 PERK FLQW CALC~JLATiC7N OJECT Shelley Lake - Phase l ❑ETENT1flN F~AS1M DE51GN BASIN V reV ~ W ~~s~ BR51N. lA rey ~D~5ICNER: TRW ° ~'ot Area fl 3$ Acres g~yl R DATE (361~4f96 Imp Area 15705 5F C= [Y86 Time Increment (min) 5 CASE 1, ~ms of Cane. (min) 7.99 Out~lvw (cfs) 0.3 rY 20 ft Overland Flaw i7estgn Year Flow ia Area (acres) 038 Ct = 015 lmpervious Area (sq ft) 15705 . L = 20 ft. `C' Factor 08625 n= 0.40 '208' Volurne F'ztruided 654 S= 0A20 Area'" C 4 328 To= 169 mfi., by Equatiorr 3-2 of Guidelines Time Time inc. Intens QDeael llvf.fn Vol.Out Storage 600 ft Gutter tlowa ' (min) {sec} (inthr) (efs) (cu fi) (r.u ft) (cu R) _-_------_......r---- --_,~..r ZI = 500 Fnr 22 7.99 479 2.51 0 82 529 144 385 t== Z2 = 1 Type B= 1 0 n= 0.016 Ftalled = 3.5 5 300 3 18 144 419 80 329 S= 0.010 10 800 2 24 073 564 180 380 15 900 137 058 697 270 347 d= 4.142 ft, 24 1204 1.45 048 648 360 288 25 15a0 121 0.40 659 450 209 A R +Q Tc Tc total I Qc 30 1800 1.04 034 669 540 129 r~r=---- --=~~Y~- 35 2100 0,31 4 30 675 630 45 0.59 OA7 4.82 m-== 6 30 7.99 ^ 251 fif 0.82 40 2400 0.82 4.27 689 720 -31 45 2700 0.74 0.24 ' 694 890 -116 ❑peak for Case 1 = a 82 cTs 50 3000 0 68 022 705 900 -195 55 3304 6.64 0.21 726 990 -254 60 3600 0.61 0.20 752 1080 -328 CASE 2 65 3900 4 60 020 799 1170 -371 7{} 4200 0.58 0.19 829 12641 -431 Case 2 assumes a Time of Cvncentration less thaa 5 minufes so that the 75 4500 0.56 4.18 856 1350 -494 peak Tlow =.90{3 18}{Imp. Area} _ 1.03 ds 80 4840 053 017 862 144Q -578 85 51{]0 4.52 0 97 897 1530 -633 90 5400 450 0.16 912 1620 -708 5v, the Peak flow fvr lhe Basin is the greater of fhe two flaws, 95 5700 0.49 0•16 942 1710 -768 1 03 c€5 1130 60{30 0.48 016 970 1800 -830 208` DRA[NRGE FC1AlD CALCULf1T1C3N5 Required '208' Siorage Vo4ume = Impervieus Area x 5 in 112 inlft 654 cu ft 208' Starage Volume Pravided 654 cu ft DRYWELL REOIJIRENkEdJTS -1fl YEAR DESIGN 53C)RF Maximurn 5tvrage Ftsquired by Bowstring 385 cu ft Number and Type vf Rrywells Requ;red 1 5ingle 0 Dvuhle VMiAN(] PACfFIC EIdGINEERIIV.C'a . - ~ INLAND PACIFIc ENGINEERING, INC. ]une 28, 1996 W.O. No. 93143 Spakane Cvunty.Public Warks W. 1026 Broadway Spokane, WA 99260 J'UL 1:+yD An]n: ELi Parl'y, P.E. _,MEER Re. Shelley Lake - PE-1750-94 - 2nd Submittal L7ear Ed: Enclased please find our 2nd full suhmittal of the Shelley Lake P1ans aind Drainage Repvrt. These plans have heen reaised per your cvnznents receiwed ora May 10, 1996. Enclosed yvu wi11 find the following: 1. Two sefis of bond prints ineluding road, storm and ESC pl'ans, as requested one set has been marked tv refleet the changes. TI. Two copies of the revised drainage report, where applicable eifiher a revised note has been added or in the text of the dacurment the text appears Pughlighted. Ill Yvur ariginaI drainage report and plans. TV. New 1ot plan sheexs, privr ta this submittal we did nat include any as none were needed. V. Ftotchford I7rgVelCvnlclin Road super-elevatiQn worksheet. VI. 4th Avenue super-elevativn transition vvarksheet. VH. 4th Avenue Curh Qesign. A design deviation for the lvw grade situation either is attached vr tiail1 be suhmitted shortly to allow for grades Zess than 0.005' Ift. - VIII. Copy of the apgrvval fvr the "knuckles" as requested. These wiil alsv be part of the subject of a design deviation, this deviation is either atCached ar wxll be farwarded shortly. IX. ariganal letter from Jerry Peterson, P.E. regarding t.he retaining wall camments frarri yvur review cgmments. Y. Original Svil Classi~'rcation testing analysis perfcarmed by rerrr}++ Peterson, P. E. for the Ti]ed!G'ay 5eCtlilIbS ~.71'opClSed. XT. Copy of the rest of Rotchford llrive tv the sQUth, please be aware that this is not afina1 design and if any design deviafiions are required ttiey wgtl be applied for in the future. XYI. Twv cvpies of the sight distance easement exhihit, if these appear carrect vve will incvrparate into the final p1at, the areas shawn have been incazporated into tbe glans submitted. The design speeds used were 35 MPH an Rotchfard Ftoad aind 40 IVTPH vn bath 4th Avenue and Cvrilclin Road. 707 WeSY 7fh • SwYe 200 2620 Lakewaod Drrve •§uite 205 Spokane, WA 99204 Coeur d'Afene, IC7 83814 509-456-5840 • EAx 509-458-6844 208-765-7784 • FNt 208-769-7277 - ~I - ~ 0 4 .Or Spokane County aune 2$, 1996 page 2 The enclQSed plans have been prepared in accardance vvith the 1481 SCRS and the current Spokane Co. Guidelines fvr 5tormwater Managerr►ent. As with every subm±ttal our goal is for yau to review and approve these plans and dvcuments with this submittal. Any review cvmments should be directed back to this office to my attention. We have made every effvrt to accommvdate a11 of your cvmnents. Betaw is a brief descrigtian far those items which may ar may not have laeen specifically accommodated and an brief expPanativn as to tFie siruativn. I J -j- A LL GENERAL ±uindicated r I~ 3. Based upon a conr~ersativz~ that we had, t we did nat have to prvvide a design for the future 4-way intersectivn ' ately he offset and the future RO'VV only exists as a Tract X garcel. 7. Based upan discussivns with the fire district we have received specific approva1 for the "knucklesleye brows" and will send t.he mylars to the fire district prior to submifting ~'inal myiars to you far approval. A copy of the hand written apprvuai is attached. RmAD AND DRATNAGE PLANS Sheet 2: 1. At this time, the rvadway sectians haue been determined from the rnatrix faund in the 1995 SCRS. Eitkier atCached ta this tiacument or shortly follvwing, a design deviatron tv allaw this will be transmitted for appraval of this methvd. Included as part of this suhmittal is a lettcr from the geotechnical engineer evaluating the soil types. Sheet 3: 1. Based upan a conuersatian with Bab Bruggeman of the CQunty, Canklin and Rvtchford will be signed at 25 MPH, therefore no speed reductivn signs will he required. Sheet 11: 1. Enclased is a Petter From the Gevtechnical engineer dealing with thvse portions of this corrment which were nvt incarporated intv the plans. 5heet 12: 1. TVv private road entrance was provided ar delineated at this time as the entixe turnaround and terrapvrary raad connection are gravel and therefore wauld be difficult to maintain and delineate. Tf yau desire, we could install signs denoting private rvad, please adwise. ~ a 1 ~ ~ Spvkane County June 28, 1995 Page 3 CALCULATT[)N5 4. At this time no Offsite flvvvs are anticipated from any part gf this proposat, therefore, no mitigating aneasures have been included. VG'e feed that we have accdmmodated al1 comnents except those noted and therefore are requesting apgroval vf this project plaia set. ]3uring your revaew, we vyill gladly take the time to discuss any review sifiuations vvhich may arsse as we feel that tlus may faeilitate oVerall approVal rrauch mQre quickly. Please call with aray questivns ar camments. S'tncerely, Inla d Pa~if ineering Ga , ~nc. . Todd R. WVhipple, F. E. TR'VVltw enclasures cc: Landmark Builders, Buster Heitman fi1e 1 0 e r ` n • ' •`~"~"°"IVV A' f M , TYPE "B°" DRYVVELL - CURB ENLET TYPE 2 ~ W/ IYPE 2 METAL FRAME Sl"A 6+75, TCW2021.13 CURB INLET TYPE 2 ~ GRATE, STA 6+58.15 5TA 7+25, TC= 2021.49 ~ ~ 42.64' Rr t 4TH. aVENUE rrPE ryg' cuR$ &GurrER ~ e ~ fi' WfDE Sf[]EWALK ~ e I ~ ~ 41 ~ 14' MQE UTiLlT" 83.09' F115EMENT--Z~ '2.8' - - ~ w ~ PQND pL7 w~ I BD[1NDARY aF LEVEL° - . 83ias- ..1"~ 3: i FIAT BOTfOM AREA - 't' ¢ , - - - _ - - - - - - - 25° sUBAcK uNE ~ ~ ~ DRAfhfAGE ESMT . 9 I ' I B ' ~ PRDPERTY LINE I ! 15' ~ f i I 30' WIDC SEViIER ~ E?SE dENT I i ~ ~~'..c~~, s~ra~c~e, ~i~E,.................,...i.............. ~ .LINE , . 1 5'..0IJ.SE..5~3ACK.. . .Fi........................................i.............. .............I....... ~ ---T-~__ , i a• VAoE LMLiTY EAsEMENr ! $5•9'' I I ~ ~54 ~NE iD TYPE "R" R~3l~LED CURB e ~ ~ 0 EXPiRES 511`24 Li ~ SCALE: 1"=20, PONQ BOTTOM ELEV.=2019.73 BERM ELEV.-2021.33 J r N IIVLArND ~ LOT 4, B LO C K 7 PACIFIG ' S H ELLEY LAK E P. U. Q. ~ENGINEERING ' . 307 M1est 7th • 5uite 200 (509) 458-8844 ~ ~ DRTE. 6/25/196 %sPoke„e, wn 99204 FAX: (50) 458-68+4 ti I~a ~ ~ ~-CIJRB IAILE7 TYF'E 2 ~CURB INLET IYPE 2 ~ 10' wioE UTiLITt" 5TA 7+75, TC=2022.16 SfiA 8#25, TC-2022.66 ~EASEMENT 4TH. AVENUE -TYPE "e°' cuRB & cUrTER ; fi' WEDE SiaEWALK r•~ 133.25' ~ z -`----~---a------104.86'---- T--~.~~~~_Jf I " ~ BDUNDaRY flF LElIEL M ~ ~'(]ND ~ FLAT BQTfvM ARE4 t2 o W 104.88' ~'v 3 . u~ ------------------~cv 0 25' SEfBACIt LINE . ~ ~ 4 ~ I I b !2 p P I ~ I I ~ 15' ~ ~ ~ 30' '4yli7E SEWER _qEASEIsAEAJIT1 ~ ` I I 2o~ PROPERIY LI~VE .............1..... r~. s - - - - ~ ~ • r"~_`- ~ ' • ~ ~ j a wrr~~ U7"iL/7), r.-69J2, ~~erv~- ° r ' • . ~ 0 ~ . ~ TYPE ~ LLE ~'I'ANE ~ 1 . CURB ~ . IL3N,~►1. ~ El(P«E5 4/24 ~ n ` RViVD ~C]OI716JM ELGY.=L0I9.73 ~41A~G: 7" ~LO~ ` BER~, ELEV.=2021.33 ~ I NLAND ~ LOT 3, BLOC K 7 PACiFic S HELLEY LAK E P. U. D. ~ENGINEEAING ■L/ West 7{f1 i JYl4g ZiW (509) 4iJO-6840 C]A7E 6/25I95 ~ ~ spokans, wA 99204 FAac: (509) 45s-6844r ,1 ~ h ~ 3 le / ' -y- ~*N i T1'PE "8" DR'YIM1fELL ~ CUR6 INLEf TYPE 2 ~ CLJF~B i~fLET ~`fP~ ~ ~ W/ TYPE 2 ME`TAL F~2AME STA 6+75, TC=2021.1 3 & GRATE, STA 6+58.15 • 5TA 7-f25, TiC=2021.49 i 42.64* Rr 4TH. AVENUE r TYPE °Y" cuRB & GuTrER ~ I fi' WipE 510EWALK 10' w~oE uT~un° y. r ~ i I EnSEMENr__ ~ 2.8, 83A9' ._----------__~._1~_,.-- -----1- g~ ~ , POND "L" - ~ ~ i BOL9WDAF21' OF LE1+EL~ T . 83.16' FL+4"~ BQTTOM AREA - 88-' ------I-- ~ --L-'~`~~ ~ as• seTeACK'LiME [?FiAINAGE ESMT.~,! 0 PRC7PERTY LINE &6 ui ~ ~ ~ I ~ I_ 3(]' Wi{}T- SEINER ~ i ~ ~ EASE AE1V7 V I i I I f I 2Q;,GARl~GE, SETBACk, UNE...................... ~ ~.....15: ElOl15E SETBACIt LINE ....,........f............ . i o' NOE urIuTY EnsEMENr I I ~ 8591° ~ ~ , l,AN E p 25462~ TYPE "R" RDLLE[J • CUiiB ~ ~ ~jEXP4~ES 9/24 „ - , SCALE: 1"=24, POND BOTI'OM ELE'u'.=2019.73 ` BERM EL,EV. =202 4 .33 ~ I NLAN[3 ~ LOT 4, 8 LOC K 7 PacIFIC ~ S HELLEY LAKE P. U. D. ENGINEEI3ING ~ 707 west 7cn • sufte 200 {509} 4as-6840 ~ DATE; 6/25/96 spokane. wA 99204 FAx: (509) 458-6$44 ~ - ° ~ i i ~ 1 -CURB INLET TYPE 2 CURB INLET TYPE 2 10' WIDE UTILITY STA 7+75, TC=2022.16 STA 8+25, TC=2022.66 ~EASEMENT 4TH. AVENUE - nrPE "6" CURB & GUTTER ~ 6' WIDE SIDEWALK 133.25' I ~ ~ . . 104.86' - ~ z ~ ~w-- i POND p L~ BOUNDARY OF LEVEL o °Li ~ FIAT BOTTOM AREA ~ 104.86' 3 . - - • ' . . . - - - - - - - ~ N I 25' SETBACK UNE . . I I l ~ I I ~ o I `n ° I o ~ I ~ 15' ~ ( ~ 30' WIDE SEWER _q~EASEMENT ~ ~ . 20- PROPERTY LINE J • • ~~w,a~E 15' HOUSf K••~.. SET f - I S~.BAC CINE . BqCK L~ly - -T_o Wlp ~ UTIi/ry L,-69.3SfMfNT ~ O ~ • I ~ TYPE " LLED NE D CURB 5a(i4', c ~SjONA1.F11G~ : ~ EXPiRES 9/24 " POND BOTTOM ELEV.=2019.73 SCALE: 1"=20' ~ BERM ELEV.=2021.33 ~ I NLAND a LOT 3, B LO C K 7 PACIFIC S H E LLEY LAK E P. U. D. ~ ENGINEERING 707 west 7tn • sune 200 (gos) 458-6840 \ DATE: 6/25/96 J` Spokane, WA 99204 Fqx: (Spg) 458_68440, , ,i i ~ ~ I SLJPEREE,EVATIdN TRANSITIdN CALGWLATIONS W❑RKSEiEEEfi PRQJECT NAME: SHELLEY I..AKE P.U.D. TRANSITIONINiG TO FULL 5W'PER PERFQRMED'BY: MBZ 5TAT9QNING IIVCREMENT = 25 ft, DATE: 6l14196 UIST TO LEP DF GUTfER = 205 ft STREET NAME: RQTCHFORD DRfVE STREET NAME: ROTGHFCSRD [1RIVE STATI[7AN IAITERVAL: 33t78,6$ T[] 35+28.53 STATIDN INTERVAL: 38+68.27 TO 40*18.27 TRAN51TIC?N IN TRANSITIDN OU1f RfGHT CURB RIGWT GL1RB CL STA SLOPE CL ELE11. TQP {]F CURB ELEY. CL STA SLOPE CL'EL,EV. TOP [7F CURB ELEV. 3378.53 -0.42 2037.48 2037.50 386827 0.04 202488 2028.09 3403.53 -0.01 2037.63 2037.84 389327 0.03 2024 67 2025.68 3428.53 2037.65 2438,04 3918 27 0.02 202447 2025.27 345353 001 2037.54 2038.72 ' 394327 0.01 2024 27 2024.87 347853 0 02 2037.29 2438.07 ' 396827 0 202406 7024.45 3503 53 4 03 2036.90 2037.90 * 399327 -0 D1 202386 2024.05 3528 53 0.04 2036.38 2037.59 4018.27 -0 02 202366 2023:64 343497 O.O026 2037.64 2038.08 x }C x ]C ]t 3514 97 00342 2036.70 2037.79 ` DISTANCE TQ LIP OF GUTTER VARIES 18.5'-24.5" LEFT CURB LEFT CURB CL STA SLDPE CL EL.EV. TDP OF CUR6 EtEV. CL S7A SLOPE CL ELEV. TQP OF CURB IELEV. 3378 53 -0 (}2 203748 2037.46 3868.27 -D D4 2024 88 2024.45 3403.53 -D Q2 2037.63 2037.61 389327 -0 D3 202467 2024.45 3428 53 -D 02 203765 2037.63 3918.27 -0.02 202447 2024.45 3453 53 -0.02 2037 54 2037.62 3943.27 -0 U2 202417 2024.25 3478.53 -0.02 2037.29 2037.27 3968.27 -042 2024.06 2024.04 3503.53 -003 2036.90 2036.68 3993.27 -0 (l2 2023 86 2023.84 3528.53 -0 04 2036.38 2035.96 4098.27 -0.02 202366 2023.64 5'UPERELEVAfiION YRANSITIC]N CALCULATIt31V5 WORKSHEEET PR[3JECT NAME: SHELLEY IL►41(E P.U.D. TRANSITIONING TO'FULL SUPER PERFORMED BY: MBZ STATIqNING INCREMENT = 25 it. DATE: 6115l96 ❑15T TO LIP f3F GUl-TER = 18 5 ft. STREET NAME: FOIJFtTH A1JE. STATIC3N IN1'ERV 8+50 TC] 10+50 TRAIVSITIOsN iN LEFT GURB CL STA SLOPE CL ELEV TC]P aF CURB ELE'V. 850 -0.02 202303 2023.05 875 -0.015 2023.40 2023.51 900 -0.01 2023.74 2023.95 925 -0.(]05 202411 2024.41 950 0 2024.58 2024.97 975 0.005 2025.04 2025.52 1000 0.01 2025.90 2026.48 1025 0.015 2028.78 2027.46 1050 0.[}2 2027.74 2028.50 ~ ~ ~ c o 0 o o a cr o o ra v o 0 o e~ o c cs m v ~ o a o a c a~ u I' ~ II g ~ R ~ R ~ R R ~ c~ R R ~ ~ ~ R R 4 ~ ~ R G 4 ~ ~ R ~ R u 13 u~~~ EL N e ~ Q o ci o q er ~ a ~ q o ~ ~ ~ p ~ o q Q o p ~ o 0 0 o a u u u . n ~i a a o ~ o ? ~i o ~ a ~ ni a o Q a c~ c~ a c~ a o 0 0 o a c~ o ci C~l ~LL 0 ~~g 118 8 S~Q 8 8 S 8 8 8~ 8 8 8 8$ 8 8$~$ 8 8 8 ~ a ~ I~ ~ 2 ~ ~ ii 1 vv. uvr oa 15Vaa Av. Vx raan VvO 0c1 r.l.zr arVilril7G rtlL.L.LS ritiz aEF.ltt WJHV1 J~ ,w g• - _ s ; ~ PM WKME VALM FM l]EPARTMENT ; cc: ~t rnl~ E. 10319 SPRAGVF AVEM ~ SPOKANE, WAI 93206 , (509) 928-1700 ~ . (509) 927-2227 FAX • ~ ~ACSDAME COVM SEMgr . Ta: recoE. , QJkTg; (aNDIWXDURL) FA7C HO : (CoMPuutr} ~C~X: v NO. OF PAGEB ~ ' ( IbECLUI3ING ' C[)PER 8RZ$T ) - COnQSENTS: --M'~, 9M, ~ sg • ~ . ~ ~ u~ ~y~ 4 ~ , ~ wi.~vr. JG4aLR1+L' ne•W+s • aaw ua.a a ~.~i avrVai o+s •c+a. ay•v•_;~~vvv 0,11 L~iYie~f9J !1"4.:16'`IC ? ~ - cAA(, . . ~ ~ ~~TF_ ~ . ~ . ■ To. . . . 1Ni.AN13 R'ACIFEC EiiIC[NEEttN~'~'aC0. COl04N1A: 707 West Yth Ave_, Suite 200 q27 ` 2-?Z? Spokane, WA 99204 ~ r-Ac HuUeeft-- fieWphone - {509} 458-Mo maiA FA)C - 4584" R~~: "S ~ HClJY19ER GF OAGES; Jde Hl1M$ER tNG"t- CG4ER PAGE ~ wTu; , r r. % ~ t~ ~~i 4 C. 13G,~ ~'4`f.1.+~n, ► ~ ~ ~ r ~~C. ~ Vn~[.~ ►~.L11wC..~~ ILa.~' ~ ~ Cjc ~ cc ~ J~x ~ _ fP,. , ~ FAiL TRANSMISSIt)N , V;'r ~y, o~ V J~c . ul ~-n~s .~ua pc r tcc ~ brucvUrD resiL.ci r1nt, uc+ti ; ~ • ac-~ I{~lLM~f7 ~IFiC Qc ~,r • P.02 INTERSECTION NC), .6 . . ~ 6 ~ - . . . . ~ _ . . . . r a ~ ~ ~ . ~ . ~ ~ 47 ~ mow INTERSECTIOlV NO. 10 10 ~ s , . Y~ O. k ~ _.r....r~. . o.w .r.... ~ W-)Mlsl~t _[XAhtA PACIFiC:YEhIG~ p.03 ~ r INTfr~~EC11'V N 1 ! F/ • 5 • ' r . . • ' ~~=2t~' ~ ~ • ~ ~ , s • W . ~ ~ ~ r ~ ~ HOMEaCEAD LAN E . ~ ~ ~ If■TEt•~~C-nV11 IfO. 9 9 ~ ` ~ w ~I r J' ~ i ~ ,lune 20, 19s6 I'rVLAND PACI'FIC EN,GINEIERING, INC. Spokane County Engineers Engineering 'DeVelapment ServiGes 1026 West grvadway Adenue Spokane, Washington 99260-0170 Attn: Ed Parry, P.E. Re: Results of 5oil Classificatidrr Testing Shelley Lake De►►eI~pment IPE Project No. #94143 Enclvsed please find the results vf sails classification testing by ❑ur subcontractflr, Giffard Consultants, Inc. on fVe soii samples ❑btainer! from the abvue referenced residential development. Sgil 5ample #1 was obtained frvm Lane F, Sta. 24+00, at 15' !eft of approximate centerline, at 05 belvw proposed subgrade elevation. Svil Sample #2 was Qbtained frvm Rvtchford Drive, 5ta. 30+60, at 5' right of the approximafe center[ine, at 1 5' belvw proposed subgrade elevation. Svil Sample #3 was obtained frDm Lane D, Sta.12+80, 15' right +of approximate centerline, at proposed subgrade eievatian. Scail Sample #4 was obtained from Hamestead Lane, Sta.1 D+00, at approximate centerline, at appraximate proposed subgrade. 5vif Sample #5 was ❑btained from 7imberline Lane, Sta.11 +35, at 15' right af ap,proximate centerlirae, at apprvxima#e proposed subgrade elevation. All soif samples were vbtained by members of vur staff. We observed soils exposed in vpen utility trenches adjacent tv the sample locatEOns, and the samples a,ppeared tv be representative of the soil conditdons vbserved to depths at least 5 feet belvw apprvximate proposed subgrade elevaf+ons. We certify herein that the samples tested were abtained from the locations stated ahave, and that hased an the data enclvsed, the USCS soil classificatians vf GP-GIVI, GW-GM, {GW-GM, GP-GC and GM are correct for the samples tested, respectGVely. Please do not hesitate to cafl if yvu have any questions regardirag this letter or o#her aspects of the project. 5incerely, E ve,•. Pe IIVLAND P►4CIF1C NG ` Nt-9 s , J@i' ~Ete ~'~1, f. E. ~Q ~ a V931a3Esa~ltest wpf Pro ct En ineer sjONA 9 enC. figures 1-5 IExPiRES 11J 27l 9-i ~ 707 West 7th • 5urte 2DO 2020 Lakewool prrve ■ SuiSe 205 Spokane, WA 93204 Caeur d'Alene, !D 53814 509-458-6840 + FAx 509458-6844 208-765-7784 • FA][ 208-769-7277 ~ ~ , Drawn E3y Drwg. Date Cllcckt;d [3y 14 ~~.'.'~7 Fic9d Rcp. ~ SI EYE AHALYSti S I HYtiROk4£TER AHdLYSI S ~ 512& OF [1PE1f1HG IN INCHE5 ~ NllMBfR OF 1A€SH PER INCH U 3 SSAN9AH0 I GRAIM Sldf IH !AM ia q 4 P b ~ i~~ i 4 q La Ci 4 0 O o 0 o a ~ o e d O 4 I 09 r - : T- -r-~--~'_ 6 ~ q o , T' ~ ~.-~f l_"._ ~ d ~~r---~~ _ ~ f--• ~ - ~ f-~~-.~ ' E__.•-- ~T~•_ - -E• ' - - -i-~ i t_W _ -'~T' ~ - l.~., ~ _T_ I 0 ~ a _ ~ o ; - - r ~ ti , ! . -•-i-------1~..6~i--L_ ..s. - r - -y i ~ ~_~_.~.~~-~~__°__~~_r;. _ ' I .~-i 90 ~t~ ~1~~~.~.~° .~-~-_i._~~ T ----v~9 k _°I 1 - - l~i ~ ' _ v9 4 30 ca ~i- -1-' ~ ] 'i ~ ~ • - ~ _ ~ l ~ w_. . _ I 1 , , ' " su ~ _ I _ ' ~e._i_..~...- F a. - - ~ ° - ' • ' _ 9 . _ ~ t--~ ' ^ ~ ! .r~ _4 1 1~' - ~ 1 - s- 1 i-~ 3 ~m~ I . ~ _ ' . _ _ ~ ~ ~ -i-- ~ cn y~ ~ ~ Y _ ._l~ ~ ~ ___a.._ - - - I - -1~' cr ~~'.~,-__~_r.~- - C_ "_~J~ LLJ $ 0 ~ ' ' ----I'~-° ".S__-I~i ~ _ ~_-f I- ~ , 4~. ~ i ' i`. ~ t o -J I -i- ; - - - - - - - °E_ ---G--° , 1 _ I-a~--~ . ~ . . - - c' ° •_Y . _ - - r-» T~- - ~•-3 - - ~ •i ~~l~i_~-+ ~ - ~ 1_ _ _ ~ ~ 40 i_ i - __i_. _____1- 9 i 3 • } ._1 • • -~r 4.! E-.: +_"_e...'""._... c~ 5 , -~l~_~__-.~ 1._f _ ~----•..;.Y_.._~ ,..~r--•i_..._. -F--- _•_y--- m. i 4 ~ - F - ~ _ + ~ - + •_--f - - ~__~-i ~ - ---^{---#-~i ~ f_ ~ - ~--fV-'~-!•-i-~ i _..~..w. 90 ~ ~ .~I • ~ ~ _ . . . _~_rrt.. ~ , , r_ E~-_ - ~ - o ~ ~ _ L ~ ~ p O tv W a [r ~O n ar ~n r5 ~ ev ~ Qa e~a n rv ~ io v n rv ~ ~ 0 8 9 P ri O o 0 o O ry ° GftAlN 51TE {N MItL1MEiER5 o 0 ~ CUBBLfS ~ cuAas[ I viN[ 1 coAxse I mzoium k rIWE ~ FIUES ~ ~ CHI~YEL I SAHO ~ s►NPLe OEeaw•rr U 5 C ~ GLA551FICAiIUN HA r L L I PL ri Hp I N G' Shelley Lake Development Lana F 0,5'below GP-GM Slightly sslty, sandy GRAVEL 2.5 Veradale, Washington srAza+vv S.G. 151LT GRAIH SIZE CLASSaFICATEOH -r~ ~ ,]une 1996 E-1716-01 ~ ~ G[FFL7'Fii] CDNSUL7'AN7$, 1NC. GeQ4ect►nical Enginasrs ~ ~ Drawn 8y ~5~ Qrwg. Da te__(~_jj`Cf(p Checked By",e'J1 r F ie 1d Rep, . ~ 51 EYE AHALYS! S I HY aRdME`f ER AHALYS! S ~ &liE OF OPfNIHf 6r+ INLHES I NUMBER OP MESH PF9 IdICH E➢ 'S SiAN04RO ~ G R A BN S12E IH MA1 ~v m 4 ~ C G ~ G O - \ t 4 p 4 4 a ~ p ,p S} 0 4 i~ O • ° ~ ~ ~ ~ I _ ~ i oo 0 . . i ff T i~~~'••E-. ~ - • - - ~ ~ r_ ~ . - ---a - ' ~ - • . _ - - : ~ _ - - - • 1 0 9 0 ~ ~ i _ - ~ . A + 3~ . : ~ s• ~ ~~y j.~i.~ _ - ~ » _ • ~ _}'.~~j r.~ 1 ":'~-i- ~ P 20 _ --~~T ! r'" ~ - ~ ' T-- ~ ~ -i_~_I`•-=.•_ •L-._•° _I 1 .p__'_ _i._,. " w.._ ~ J - -~~T~'". ~ • - - - . { -1_i - _r _ _..1 • •--_---_i~ __~.r _ R ` , . - ; - _ ^ 3 U 2 0 ~.w ~ --L-~ p ~ - - ~ f -F ~ ' - - _.W Lii so TF-~---f~----j- fi---~--- __.._..._..__i_...,.~1,~~-----~•--_ - ~ ~ ~ i-- ~ i~-~-~-. . , ; ~ i ~_.T__`.a~ ~ ' l~_v -+--_r~.! . •~s ! • ; ,--L~ - - - • o i ~ _ _ _ a- ~ - _ • i.. . W.... aQ _f ~ _ - - i ~ -~-f T!-~ _ < <I - ' i.___. ~--r---~~ ~'_5 ; . _ , - - ~ - ; . . k . _ ~ ~ ~ ~ ? . s °C ~ o ~ ~ 59 _ a_~ _ ~-J i e_.~._i~_.~? a ~ . ~F---'- ' -r--'--- CK C-2 ~ 6 0 _ i^" "~f~ ;-~F__..s_ ~l-~..~ _ « ~ e •~I I i I 3~ T' ~ 1 E d ~ ' tl ~ - LaJ ! ~ ~ } ^ 1 i~ 1~" E ' _ _ . . C? w ----•---1 ~ i---i -~---~~..l~__ -i, ~~~.l._~---µ-____--°-___ 70 i,~,a ~ t_ . ~i ri...~ rt~~ ,_1_..A..~__ ' F f~ ~ a ~~:.v.~ i__~ ~ L._--.~.. ~ ~ . L__..r._ ~ ~t-~_ ~ ,-•j-_-1--, • _ aa s o ~ i"}_ ~ ~ .rl-' ~--_~~.l..i .i-~ • ' ~ '4 Y I 1 i ~ 130 , ~7I--~ r---~--° ~ ~ - i--•- - __..r_~. - - ~ - - - - ~ - - ~ o - - ~ _ ~ ~ _ {i ~ ;_~-___,r • ryr ~-l~'.1~~~.Li~__~~~. ~ ~ _ _ ~ ~ ~ ~ l n .r ~ in v ~-r ov ~ y ° ~ o r~ o o ~ - CRAIH SIPE IN M1LLIbfETERS ' ~ • ~ C0861E5 ~ caARse ~ vir+e I C{176FSE d ME oiu~ I FInE ~ FiHES ~ CRd~Y[L I SkHO , 1 ~111 LE pfPiN•Kf U.5.C. CLA551FICAiidN ~I HAT LL PL PI No. ~ w c ti Shelley Lake Development Rvtch- 1,5'belvw GW-(M Slightly silty, sandy GRAVEL 1.4 Versdele, Washingtan _ fvrd Qr S.G. .T1 5TA34+6( GRAIF! S$ZE CLaS$IFICArION ~-4 5'RT June 1996 E-971b-D1 ~J ~ GfFF4AD CONSULTANTS, ENC. Geoteehrricaf Engineers Drawn By ~ I3rwg. Date .0'19'q69 Checkcd flyField Rep, " 5A EYE AHALYSi S I FR1IDROMETER ANALY51 S $11 f Qf {7P(191NIH INCHES ~ H11Mp£R OF k1E$li PfR NHCH l1 5$iAHOdRA . CRAIN SitF IN kM o °~a Pe c+ o a ° ' F n u ~ m ~ N a m c' '3 ° o 0 o cs c 0 i fl R ~ ~{-T- ~ t ~ ~ i i ~ - I~~~I--- ~ -T1 - -'r------- S -~.i ~ - _ - $ rwl ~ ; i ~ k..~~'"_~-__• ..°E ~ i _1_ ~ . _I ~ '-•-•I -_°._r--- -~'---~~.W.m . _i j ~ ~ -I- - _i' I _ • -r~_-~ r...- ~ ~.~~~_7-'-~~°•___.._._ ;_~.i. i - i--•- i a : . F ! I _-1~ E-••L~_ ~~Y ,a-_ ~ ~ ._._....___j _ _ T _~Y.~..~ ~ I h i i•-' -~i - E^~ ~ 20 a a ~ - -._.l~_~~ - _ I-- i ~ _ _ _ . ` . ; . • _ _ - i- -i° -J- ° _I~~_. _ _ _ 1-- -~•--f - ; I-9 i i. , 3 .v.~.___ i _ Y ^ ~ _ ~____1_ ~ t ~ ~r~--~- - _ . .i:=. _ - ~ ~ - - , ~ , _ _ d0 39 l.R~-.~ . I° - _ • ~T1--~--~-- . - °r' ~ ~ -~~_L~~_.' _ ~ ' _ - i i ~ L:_•_._. _r_~ ~i..._.^ ~ °'"f--- .e ~ 3r b Q j---~--}=- 40 ;..~L__...~._- ~ .-q ~ ~-t.-Ti-- ~ ; - - ~ ~ _ ~ ; - _ ' - • F m ~ ----I- =f~" ~ _ [ ' P ~ : ' ~ cc cc __f w 50 I - F i : ~ i ~ k, ~ I~_ .~.1 ' . ~ E 50 y °y- i ~~-1-.~"• ~ _ ~ i _ l ; - • - ° 1 - - ° ~ + ~ ..r~ ~ _.~_~___~._~._...~1~ _ : ' i ..-E--E L.1 8 ~ ~~T- • - r_ " ~~-i_ } ~ - ~ i i ~ _-_~.._.w._..~.~i..~_,._.t- 60 r LLJ ~ i~ _ .,TY.~ t r ~ ~__~..__d•-.. -d._.._._._~_;---- u -7 - t-- ~ - --.Y-•...... ~ ! - • I- r--• -1--••~ • - W w r_._~~~-~-~-•-~--- cL So _-4 ui _I__,__ _ - ; ' --°-s _ . _.}--i--• •---•I------ : I• : - -°°9 a -----~-r-- - _ Y} ~_-1_____ __.~_E~~=j--i•-k---! e~u 70 __--°-._l.~ - ~ - i--- - ~ ~ - } ' _ ' ------6 ' ~ - A. . • ~ , j ' - - ~ - 10 _ } ~r~ _.1._. ~L. - - ~~j rf - - - ~ ° . ~~-r~ __.v_ _ _ 4 E_~ i_j~ ~ E_• ~ •-w_ _ _m _ _ - - -~-1- Y tl _ - ; ~ ~ i ~ I ' •i- • - - 0 I ~ - -I--• , 11:LL Ll 100 b 4 m n - ' O 4 p o 0 0 ~ ~ ~ - GRaIN sir€ IN MILLIk4EfER5 1 CDBBLES ~ CD~RSE ~ F9HE J CDl~RSf I MCCII]M j FiNE ~ FIHES I F GRAYfL I Skdlp _ SAHPLE I p¢pTH-f1 u S C I CLA55kFIGATION LL I PL Pi 'o I* c n 5he11ey Lake DeVelvpmant Lane D Rpprox,SG GW-GM 51'sghtly silty, sandy GRAVEL 2,5 Veradale, Ylashingtfln 5Tai2+so 151RT GRAIH S12E CtASS1F6CATIOH T~ ~ June 1946 E-1716-03 C7 ~ GIFFf7RD CONSULTANTS, [NC. Geotechnical Engineers f i f]rarrn 8y 15VV` ❑rwg. [Jate ({r -[!'~~A Ghecked i3y-X(ff Field €iep,~Y ~ si EvE ANaLYsi s I HYDRAh4ETER ANALYSI S i SIdF 9F OPCHINf IN INCHES ~ HIIM6EN OF MESX PER I N C H ll 5 Si►N[3AA0 ~ G R A I N SIIE IH FAFI ~ - i . • - o o ~ ~ ~ o a a ~ ~ r~'.. ° ~ o o r .a c a ~ - ~ ~ - . . - a ~ ~ w g ~ [ 9 -""i--~ ~J 100 ~ Y'_ I'~~i + _ i_ _ ~ 1 i •-1----.-{--~-~!~tl~ ' ! - -r.~..~i ! ' - j __~._~__l. ~ .___L-~ J..~.._'.~} ~ , J 0 \ , ~ • ~ ' ' TiE-1-1 ~ 2 0 i. ~ ` `i_~- - ~ ~ ~ ~~r f. ~ _ - .;•j-1-~ ' T'~ ----•_I _ ~ _ i r +-•t-- ' } ---~aQ 10 f ' ~ ~ ~ j o i ~ i ~ IT-_ L;~ '-•r-r~ - s z i ___~_,c____~--_+~i~i r.T._'! I ~_~..___._-k- •-...~i i-w.~_..~_ + E".- ~ _ _ ` ...t _....T,_ ~ r~ -t° 1l 1 ` C-3 ~ i_.- 40 ~ o T~--, ~ r i_...__1~ ~ ' ° - ~ ~ ~ • - . ~ 1-~- Y i -1-~--r ~ ~ . ~ i~ ` i• . • • - e__-__ -t-- ~ _ ~t - r.__~ _ , . • ~ ~ ot ~ r -k--- - ~ 5~ ' ° - - _ I---..-, J~ .~i-~_._ `ac ~ ~T = JI-.__:j ^i ~ ~ ~y~ i -__'s - .T_~~ I ' _ ~ - p ~ ...v.~ _ _E.~ ~ - . ; ~ -~-_~__,~_;.r-'• i i- v ~ Yv ~ ~^j-----1 - 1-o___f..~~- - ; f i iY ~ T' i~ ~ ! • ' . ~ ~ . ~ 6 ~ ~ W Y aQ ---LLJ ~ i E--+ • [c o. ~ i r ~ o _»-F-•_._,~:._ , - w h i ~ - - A ~ 6 ~ ~ o- ,-T-;- t-- - jo~ s ~ - ,-x _ ~ S U T 0 ~p r ~ _ . __-f.__. ~ _ 'S--F i ` . go ~i~~- _ _ ~ - ~ ~ . • ~ ~ _ ~ _ _ ~ ~ a - F o 00 g GftAIH 5S2E lH AtiLLiMETERS CUBSLES ~ c'P''RSt I f Ir+e f coAese I MFOiuM I ftHf ~ FINES I ~ f,AAY€ L I SAHP , . SAN~LE I 0 EP1N-FT ~ U S C CLASSlFIGAIIQN ~ xUt r x L L pL I f~ 5helley Lake 6evalapment Vereda1~-. 'rlashingtnrn Home- Apprsax.SG GF'-GC Clayey* sandy GRAVEL 1,4 29 17 12 Steari Ln, GRAIH 512E CLAS51F1CA7I0H ~-j ;rA10+100 ~ June 1996 E1716-(]1 # GIFFQFtp COldSULTANTS. INC. Geotechnical Engineers J ~ ~ drawn $y e;;r~ _ Drwg. Date (o Checked QY A'~f Fae1d Rep. ~ SIEYE AHALYSIS I HYOftDMETER AHALYSIS ~ SPdf OF 6PENIHC IH INL~IFS I NUM6ER Q( MCSH PER IHCN l1 S 51'ANQAFO ~ CR.IIN 512f IN kM n ~ ~ ° ~ f° ~ ~ + a ~T o o n o o v o o c v i on o .,_..•_---"°--.~p 'f- - ~w~- ~ - - " _ ~ _ _-E - - , _ _ - t ' i ~ ~ - • t - ~ ~ ~ ~ ....r r•--.~~ • I_ ~ - . i -'r i 1 0 9 ~ 1..._.~ - - - ,_W-~..~,_ r~ _ L{-- _ ~ -f _ r _ ' J T ---i ` r_~ ~ } ~ I° I L._ ~ ~ iµ- Y Y" 70 i a__...~o ~~_-L~-~• _ _ _._.1~ ~ a -1 "i } 80 ~ - - {--~d" ~ ~ I 1 ~ ~ ~ ~ i ! : • l - r' e i° ~'~rtT ~ a t~' •,-i ~°~--i-_--•_~~_.__.._.._i ~ ~ }0 4 n ~ ~ Y ~ , : . ' ~ ~`f`_"• ; . , ~ T _j - 1_ ~ _ _ F _ l ~f.._~; _ . ~r__~._.._.~--- ~ ~ _ . . ea m ~ ~ Lyy cr -F----- ±T • ._.._i-__. 1'_ c ~ e,~,_ 3_ i ° _ _ _t °-__---_E~~_~ i ! i _ ~i - _ ~ 60 60 I.e T1 ~ r ` Y~~ Y i _I ~ly -'~-t- - Y--1• I-- T ~ 1 i I~' p --fi--J~-------~-- ~ ' i i T_`_- ' -9----~ 9_ . • 9 ~ cc ~ - T~~_1--~--~--h-- ~ , , ~ ~ ~ • _ ac LLJ 4 - _ 1 ~ ; 't° ~ '-j- i ~ ; ' Zq w ~ ] Q _ ~I =T~'~r ~ ~ E__•-.•-' _ ~ - j--- - ~•~p-j- ~ , _i.~__._.~__W._. CL- } r _ t.... V-~-- ~ -i° "`_'~'---v_._ ~ - ~ - s. ~ - - • • • ' _ . _ , ; • , r f_'" ~ - •~•_..e_ ; ~ • - - - - - 1 -s- • ~ ~ ~•-f- , __t__1 _ _ _ - j--~ - - ~~i-.~R ~ ~ ~-i F_ ~ • _ W_ I ~ ~ _ ~ = ~ . ~ ~ . __i--- :--iP - ' ~ Q .._F_------- __l~._ __v... .r~ ' - i ~ . i ~ c-__~-~-- -p ~ - r~ ~ ~ ~i~f•-T, ~ ~ ~=~TLI r ~.Y - . - _!.1 ~ 'c ~ ~.i F. i a o O rt~ n - . p O 4 ~ a ~ o ~ ~ ~ - GRAfH 517E IN kkIiLIMEFERS ~ COSBLES ~ co+~ast I eirrt I eoARSE i meaivm 4 eIxE ' FiraEs ~ I C,RAVEL I SAHO SeMVLe I oEPrx - f r I V S.C ~ CLASSIFICATtON L L rt PI Ha Shelley Lake Devalapment Veradale, 1~sshing~vn Timter- Rpprox 5G C~f Si~.ty sandy GR11VEL 2.0 25 23 3 Lir,e -T] Lane GRAIN S12E CLASSIFICATIDH ~ S7A11+35 June, 1996 E-1716-[]1 • t5'R`f ~ GEFFQR❑ CC1NSllLTAP~lTS, INC. Geoteehnical Engineers q ~r _ INLAND PACIFIC ENGINEERING, IN'C. June 19, 1996 Spokane Gvunty Engineers 10261illlest Brvadway Avenue Spvkane, VVashington 99260-4170 Attn: Edward J. Parry .Jr., P.E. Re: SFae'l1'ey Lake PUO, IPE Praject No. 93143 Second ReView Coranments SheQt 11, Retaining Wall Dear Ed: 1Ne are respvnding to yaur reyiew coimments an the propvsed Keystone retaining walls at the above referenced praject. A soiPs report was not deemed to be necessary ta suppart design of a Keystone gravity retaining structure an the subject site. A s❑iis nnvestigativn and repor# may have been appropriate if saiE conditions on the prvject site had been unknawn, but typica[ properties of the Garrison gradels can be consen►ati►rely estimaked by a Ivcal soils eragineer with experience in these soils. A cohesion value of zero pvunds per square foat, angle of internal friction (phi) of 32 degrees, and a moist unit weeght of 125 pvunds per cubic fvvt were input intv the Keywafl design program, and suitabCe factors of safety against sliding, overturning and bearing capacity failure were obtained. _ The geotechnical review provided with the March 21, 1996 letter was a revisw of the plan 5heets pertaining to retaining walIs, not an abbre►riated sails report. Pertfnent elements of that review haue been added to appropriate places ❑n the pfans. The iack of a date on a professiQnal stamp in no way invalidates any of the iroformatian contained in a letter signed by a licensed professianal engineer in govd standing in the 5tate of Washingtvn. The Keystone byline informata❑n is generic in nature, and daes nvt take precedence over a site specific edalua#iora conducted under the supervision of a licensed prafessEanal wh❑ is designing the wall. 707 West 7th . 5ulte 2DO 202€} Lakewood Dnve ■ 5uite ZOS Spokane, WA 99204 Coeur d'Alene, ID 83814 509-458-6840 • FAx 509-458-5844 208-765-7784 + F,Ax 208-769-7277 - . . - ~ We trust that the informatian supplied herein is sufFicierat to answer yvur questians. If yvu shvuld have any questions regarding this letter vr other aspects vf the prvject, please do nat hesitafe to call. Best Regards, INLAIVD PAGIFF rEERING,INC. ~ Je4PetersQn, P.E. JEP:ell ` enc. a t93141p9frytet.wPf . a,Y a i • - . • ~ 4 • ~ RE■ J.1.J ► ■ COMIENTV ~ sgoKArrE cOuN-rY DrVISION QF ENGZNEERING & RQA7S 1426 W HROADWAY, SPC)KANE WA 99264-0710 PHC3NE (509)456-3600 FAX (509)324-3478 REVIEW 2 REVIEWER: Ed Parrv . PROJECT P1750 T7ATE: 9 ilWiad 96 PRDTECT NAME: 5hellev Lake F.U.D. L)ue to the extent of recurring iterrrs, these comments are generaL in nature, and reflect a cursQry reuiew of this suhrnittal. Please ensure xhat the plans arrd calcu[ations eonfarm to tite appdicahle starzdards, and goad engineerrng practice 2nd Review; -E NEneed to be signed b}+ the Develvper privr to approval by the County . 1~a'r~ ar t eer~tire ler~gth crf Rotchfvrd DriGe (per canditions vf the design deviatior~ - see Cvunty `~ngineer's s letter dated 22 Jan 96) were not received with tMis submittal 3. Engineer's Conditivn #140 requires that the 4th Avenue intersectivn at Conklin he designed as 4-w x intersectivn. w dves th' rv dalignmenc fulfill this Gvnditiva~? Pl~e call to discuss. ~d ~ f0wr ie . CL eleVations at road intersectivns need to be cavrdinated between the various plan sheets ,/Street names in the station equatians need to be coordinated with the street nannes shawn vn the pians. ~ 5treet names need to be co4rdinated with t.he names shown on the pIat tkprg I OThe plans wi11 need fihe appraval af the F'ire Bistrict prior to approvai by the County (5,e,rmj ~eiat pands needs to set tc~ at l~t 0,2' abave the Ie~west '~IC at the pond. . SiFEnished grade ~ntvurs need to he shown for al1 d~rrage swales lb &VW& R[]AI) & L1RAINAGE PLANS ~ ,P p4- Sheet 2 ~ 1.Provide "R" Value tests fvr all soil group types to verify pavement sections. Other methvds vf pavement sectzon design may be acceptable to the Cvunty Engineear, upan submit#a1 of a Design ~ I]evration Request 0.0( i~ I, r _ REvZEW C4]nvIlVTENTS Page 2 0f S _ S May 9C F'R(]JECT # P175~i - REVIIEVW # 2 2. The width indicated for Conkiin Rd. (40') dpes not meet the 44' wfdth required in Engin~er's Cvnditian #25. The sectivn for Gvnklin Raad should also indicate the 2-way left turn lane nQted in that cflnditivn. ~ ~ ~b fto-~, ~ ~ 3, here a pedestrian pathway is provided as part of the rvadrvay width, the sectian typicall,~+ h~n fset crawn sQ that vehicles dv not straddle the crvwn 4. Rvad sectians need tv indicate exist3ng RIW, gropcssed RIW, futare acquisitivn area, d existing paving, as appropriate Sheet 4 76 ►r,,_„ - s~ Prv i leaking si sbr tt~s r u d s eds as per the design deviation conditipns. /Contact the Count}+ Traffic Engineer to determine taper requirernents to transition fram 40' width south vf 4 A ~nuf t ~D4~idt~h nor fs4thAve ue ~ ~ +~'`'~~A- - ~ Provide the superelevation inftrrmativn for the curves alvng Rotchford Drive. i'+~. ~ dt•e''~' • ~ ~ ~dr ` ~ ~l~' ~4i. prvVide adequate sight distance ft~r the grad~, teR'ain, ar~d ~ wertical curae at P'VI 43+00 dms nIII road classr~icativn ~ ~Aheemsiime'e~to prvv2Q8 treatment fvr the neu+ paving, as a minimum. The drywel} in the curbiine at Conklin 40#49 RT dves not aGcvrnplish this. Sheet 5: M&~ 1. The design needs tv provide 208 treatment for the new pauing, as aminimum. The drywell in the curbline at 4th Avenue 6+75 RT does not ac~omplish this. ,,zCurb grade sheets for 4th. Ave. vvidening were not received vaith this submittal. ~ t te--- ~ 3. T'he pavement transsitioru on 4th AVenue needs w prnvide atager length vf at ieast 10:1 (10[3' rninimum} . 4. C e below tkle cvunty minirnumr vf (}.5 %'e; the Cvunt}i Engineer°s appraval of needed privr ta pia~n apprvval. _~~is Trsin De~ t io~~~ ~ ~ i ~ . ~ ~~W C[?1ViIMENTS Page 3 af 5 8 May 96 PRO.IECT# P1759. REVIEW # 2 ,,,The hQrizontal Gur►re CL (258') does Aot meet the 81 SCRS minimum radius for a Collectar Arterial on fllat terrain (715') . 5hee€ b: 1Vo Cvmments at this tirne Sheet 7: ~ ~ I 1. "'he "knuckle" in~rsectivns wilI n~d the Caunty Engine&'s prv~ a1 c~f esign Deviati~rruest. Written approval frarn the Fire I7istrict should be included as part vf rhe jus ' nn. V~ CL bearing & distanee need xcr be shawra fvr the leg vf the "°T" turnaround at the noraherly terminus of Homestead Lane ' Sheet 8: N1a Cvmmenes at this time Sheet 9: No Camments at this tirne Sheet 10: No Comments at this time ~ Sheet 11: 1. Retaining vva~l:~-►~ a. Need to include the necessary soils infvrrnation, ~a[cs etc., to shaw that t~tre wall is design e~E p$operly. Far example: (1) TCB0 report #4599 (cantained in the Keystvne manufacturer's bvak) indirates that a soils report must be submitted. The snils report needs to cvnfarm to Sectican 2905 of the 91 L7BC (which is now Seetivn 1804 of the 94 LIBC). The "geotechnicai review" pravided in yvur 21 rnarch 96 letter does not appear to adcress the required items. In additivn, chere are eternents of the geatechniral reuiew (relvcation of the heel drair► to the subgrade elevatFVn of che crushed rock bearing course, 2' vvidth af backdrain up the height of the wall, geogrid reinfvrcennent, etc.,} which are not indicated vn the wall OZIAI detaii, The P. E. stamp vn the gevt.echnical review does not hear the date of signature. ~~f jw~, (2) Tfie Keyst.one Buyline informativn (cvntained in the Keystone manufacturer's bocrk)~ A *4al-- indicates that geogrid is needed for wa11s with sivping backfiills ,,¢3/ Need ta indica,te Oere tt~e foundation drains will ~laylight, and ,~rovide sc~~ee svrt vf vermin ~ prvtectivn V~ ~ - - e. ~`he ~ ining wall locatavn needs to be -aordinat~~ with_the-grading plan. Ofnished grade contours . af ttte wall need to be shown as part af either the raad plans ar the wall detail; gradi ~ .ement y e neede~d ~ l~-~°~' e e d t a i n d i e a t e s t a r t l end stations far the wall cvnstnactian ~ Landscaping needs to drain to the street (2% dnin.) _ _ - w REVIEW Ci7MNMN'I`S Page 4 vf 5 8 May 96 pRf7..YEECT # I"175i1M REVEEW # 2 ~t~ cut-off swaie is typically proVided at the top of the wa11 2. The floot elevatiDn at Pond H(2020.87) neetis to be cvQtdinated wi the grading plan (20 and wiah the cucb elevatians far Rotchfard DriVe. Fin~r~e to~rs ne e s o ~ ~ ls [h neck in Fvnd G wide envugh to construct and maintain pcogerty? J~ . eet 12: 1 The prtvate road entry antv the Rotchford I]riue temporary cul-de-sac nesds to be canstructed as a driveway entry, to delineate the public roads from the private rvads ~he temporary easement shvi~id '~e cvnfigur d s arafe easemenrs ~'vr tlhe pub1 ic t ~ ~ ~ ~ ~ ~ e ~ /A cancrete or ACP pad (typically 6' x 6') should be prvvided at the inlet roihe pipe at the ternporary drainage pand. Considerativn s uld be giVen to alsa providing a sumg to trap out sediment prior to dischatge into the pc~ ~ _6IT /ftk GRADINCz R[]SIQN CONTROL, PLANS 1. As was mentivned in the preuious camrnents for these pians (November 1995), the straw bales are nat likely to be effective as prvpvsed, due to excessive uphill areas, lorng surface lengths, and steep slapes. Snme additional infarmatian about the use af straw bales in included for your infvrrnatian 2. Haw tivi1i rhe tvpscai I stockpiles be stab ilizedlprvtected ftom ervsion'~ p4`' 3. ►4re there any limits vn the amcaunt af disturbed area, and haw Ivng the disturbed areas r„an remaan open before same sart of stabilixang means zs rnandatory? 4. Yvur transmittal letter (29 Feb 1996) indicates that nv calculations were provided for thc sumplsediment trap at the NW corner vf the site. 'Phe grading plan indicates that an existing is being utiiia.ed £or this purgase, wifih same grading to expand the natural sump area. ealculativtzs are stiPl needed to show that the prQposed sump is praperiy sized. CALCULATZaNS 1. The basin limits shvwn on the basin map need to be cvordinated with the grading p1an, as wei1 as with the locativn vf the varivus catch basins ~ , i , ~ ~ ` ~~a•~x.~~~._, . .s.--• - , - : - ~ - - - - - ' . _ ~ ~ r . S k' C3 F-- A N E 4'- tJ 'Ci N T Y DIGI5I[3N [7F ENGINEERf3+1G ANi7 iiOADS ■ fi L)tVISIC]iY OF THE 3'CdSLlC Wt7AFCS l7EPARTMEN'C William A. Jahns, FE.. Cownty Engitneer T3ennis M. Seatt, P.E., LYirectar May 8, 1996 Tvdd Whipple, P, E. IPEC 8uster Heitman Landma.rk Builders 8205 h[orth ❑ivision Sgoka,ne, WA 99208 SUSJEGT: P1750 - Shellery Lake P.U.A. 2nd Review Gentlemen: Due tv the numher and extent vf recurring items, a cursory reuiew of the road, drainage, grading, and ervsian contrvl plans, and the draina~e caiculatiQns far this project has heen accomplished. Areas of cvncern t.o us are indicated an the attached list. Please make the necessary +r.orrectivns and resubr►ait thern to this office in vrder that the rewiew grocess may prviceed. _ _the l~a ans Please ensure that a11 rhe plans and calculativeys are submitted as vne cvmplete submittal. If you have any questivns abaut this review, please contact Ed Parry at 456-3600. Thank you. Very truly yvurs, William A. Tahns, P. E. Sgokane County Engineer ~ 41r;., Edwar 1. F. E. PIars Review Engineer encls: P1ans (I sec: roadsldrainage, 1 set: gradsnglercasion cvntrvl) ^ I3rainage Calculaaoas Camments (5 pages) CC: pLC!]e6L file reviewer (ccmmertts only) iazs w eroaaway aye. • spokme, wA 99260-0170 1 t5093 456-3600 FAx: (509) 32a-aa78 MD- (509) 324,3166 ~'i ` i REVIEW CONIlAENTS Page 5 of 5 8 May 96 PROJECT # PlUQ_ xEVEEw # z 2. Offsite topography needs to extend far enough to define the basin limits 3. Offsite basins need to be accounted for in the design. How are the flows from the offsite basin south of basin A managed? 4. Pre-deve(oped and post development flows for the basins dischazging off the site need to be analyzed to determine what, if any, mitigating measures may be needed to manage flows 5. Provide calculations for the pipe to temp pond A. 6. Pipe from CB1 to CB 2 does not appear to be adequately sized for the flows into the pipe; Please check & resolve. Please recheck other pipes to ensure that they are adequately sized - a pipe network analysis is typically done when a pipe system is intended. 7. Verify the width of ponding in the street at the locations where a sump condition exists. 208 LOT PLANS l. Lot Plans were not received with this submittal. EASRMENTS 1. Sight distance easements will be needed I I I I 9 S Y' Cl I< A I-1 IR C) L7 IV TIV' 17EPARTMENT CF BU1L171NG AND PLAAiN21aiG ' A Z7IVISIDm OF THE PLJBL9C V1{°TORIfS vEPAA'PMEiVT ~ ]AMES L MiANS4N. C.B U, DIRECTDSL F]EIE1NI5 M. Sc47TT, i'.E., DmECToR ~ebTuary 6s 1997 RObErt He1tma1'Y $205 N. Divisian Spokarie VaA 39209 RE: 5helley X..afce Dear Rabert: The adcUessing plan for Shelley Lake has been revised. This reuisivn was necessary given the fmal road names identiIed on the plat. A copy of this revision shouqd be recorded rvith fihe County Auditor. A revised capy should alsn be provided to ycrur Title Campany. Copies ofthis revisivn will be circulated ta the appropriate agencies. Shcauid you hawe any questivns, please feel free ta cvntact this office between the hgurs of 8:40 and 4:00 p.m., weekdays. Sineere:ly, ~ ~f ~ ~e ey E. orry Senivr Buiiding Technician .TEF:tab c: Assessor's 4ice Fire Distnct No. 1 iJtitities peparkrnent U.S. Fost OfficelAddress Section 911 AdrninistrativnlHeidi Works ~ri~~uv(Pr~ ~gr-rnl-,n4W Vera VVater I]isCrict U. S. West CQmmuni cations 1026 WESr BxoaDwnY AvEvuE • SPOxa.NE. WasHiNcrvta 99260 SuILpuvG PHONE (509) 455-3675 • FAx (509) 956-4703 P[.ANNINc PHoNE (509) 456-2245 • FAx (509) 456-2243 TUI3 (509} 324-3166 i ~ - • I . " ~ 8,254 S.F. ~ r'~` ~ ~ ~ ~J ~ ~ ~ ~ ' ~i .v~ jC~'a ~,C,`1S- ~C ~ 06` 0t ' 31 " r~ ~ • ~ 0 1'32'43" 2 ~a ~ • f QQ'41'46' I"P ~ 8,537 S.F. RO~~~•1~~ ' A 00' 3$' a 2" ~ 0zo ~ ~ A 40'35' 1 1" I ~'~t? ~ ~ • ~ ~ It 24'25'59" , 3 I . ~ ~ . • . r~ SEE ~ ~~~~ia■ . MA i ~ r 200' SEfeACK FRaM ' ' r f]RDIIJARY HlCH WATER LINE b~ ' Se 1 vQ f 7~.~ 2 o- .00•~ 1 2 SEiELLEY L►4KE LA~E 10' UTILITY '~~4 _ E~Ehi€MT ~ • _ ~ ~V~r ~ ~ ~om q a 4ci . - VL y~, ' • r~~ C~~' ~ ~s7* 04• 110 C9 13 ~~y~ "7~ ! ~~a' .,pd• '~Y ry $.316 sF ~ S~'E ~ ~ ~ ' ~ ~ 4.F. ~a r ♦ r~,~~, ~ rS ~v . ~ 1 .3 0' ~ CK 3 o, 00oo"~ ,`4~'4 . Cbo l • ~ p ~ ~ ~ ~J 10 e ~ ID Es~rr. 44'J1n097Pj 7,623 5 F ~ ~ ~0 Irv U N P LATTED 770 ~0i e►~ 9 a lV.~: ~ r,,~ 5~, ~ : ~`I► I - 6l 3 / TEMPORm4F?Y T[JRNARdUND - f AND ❑RAINAGE ESMT. PER I aU61T0R'S poC. #4v[ov4i74 I P)I~ 9/0 o ~ ~Q a I ~ ~ ~ - ~ -91.72' i ~ 5$5 T 7"24"E , ~r . I n . ` tji6 aCOR tiNER 8~5 E.-.o~. t ~oM ~r'o Sa. ~ 3a 1 25 ~ N772g~2~' E . 3 ~ i 94•00' icsou1K t- ~ ~ fD E CONKU RO l 1 - _ p0• _ o AvENV„ (cL) O ; o 9 4' ~ ° ~ Ng ~ S•s,OTP~ ~S . 134 13'-~ .r°-, . .~q,~~7'W . g4.72' ~ Cg~ .t (T c3( 0 f 11 0/ OTqL) R~qLiGN ~ ~ ~~v-~ v/ .e~? EMqF~NT 40 ~ h O ! 1 34.956 DQ~. . 3C SZT ,o. ~ ~ . - ~ ,,v 10' UTII.IIY r ~~MEN ~t5 : i ~ ~ / ~p,~cEME►~T ' ♦ / '}O•'0~~ 4 • ` / - ~ N S-T gqCK ~ ViA E~. 2Q0' H1GN `C~ ~ s / N c.7! • ~ .!:•'~1 ~ N AC~ v h EASEME Ss ol lZ F aN MM ~C~ 8'25 S.F • 4~0'~~C~~. ` k , ~ .~`o ~i' y~P ~4 P 4~~ ' 5,37' E5'40' 8,597 S•F' It~ Q O • a~~ - - c~6 '~4 45,,~ _ ~ ~,~`9 <L . ''S`° °bj' ~3~~ 4~. SEE ,HE ""m... , aa`~es.~ i u' . . ~ ~ INLAND PACIFIC EINGTNEERING COMPANY 707 W. lth Ar+en,ue, 5uite 200 Sp6kane, WA 99204 {509}458-6840 Fax• (549)458-6844 TO: C,0LJtf+3TY DATE: I.F.E. PRO.TECT 4q=-AI 4 3 - ATTENTION: ED PRO]EC'I' NAME: 4%C.AeC.G DeSCriptI0n Xervx Prints 0 Copy of Letter ~ 0 ariginal Drawing Cantract L7ocuments ~ 0 Work Authvrizatican ~ Report ~ Nn. Copies Description ~ ej'7'rC'6F0Zf3 Mt op, ~ YFI rzT_ Gm P-ve ►~'Cm ~7-4av) cA l..c~ S ~ Purpose l ►!I infarmation ~ Review & Comrnents Per Your Request = Writt,en Approval 0 Signature & Return ~emarkS QRjLV-- 'S'EW~7- eawuLeEp_ 4..F ~ ~~.Y GVF-STj-Qt!4S ClR G~JL4~~~~ FLSASZ- ~T tiF LLOA) _ ~ •t~~,.,~ ~r ~ RECEIVP-IJ - , _ SAgned: ~ - SMi[AIiE ODUWTY ENGtRW!- i ~r• - - . . . . :~,~-~;3r~^. . . • , .y~~.--...,...-'~~:t~•~- • ~ - 'a • •~Y ~~w Y r • • . ' ~ f - ~ - d _ . a i • • • k. : ~ ~.y,.~' . aa ` yy .~~i~ s 9~~ g 1.,~ • t .a +~.v . .l a `~~3 `~ti' ~ ~ ' k, 'i~.` iw`• 'i'~'.: i s s~-~ - s~s.~ ~ t ~-.z ~~►'~e''-- ~'ti 1`,~ { , a;~'; 9.fs 4~• q c~ R ~K ~ k~y • f~ i s~` ~ l~~ 3t 9ti~•i@ g:'y{ .4-~fV i. ~ x ~s t~ 6 . ~ • r.L~„,• j qTL w~a.$ ~`'-~.~,"d+.W ~1 ~t..~~ M' ~'i~,~ • S ,J ~ e l±s pc ~ P„ f FR i . o ' ' ';'~'~J„~ ~ ~ t.~. '1 r S~ ; ~ ~ ; ! ~ ~~.^~~M. i 9 . ► ~ r. iF €:15 ~ 1. „ r ~'~+-r L= e 1 . L L `~~'e 1 •2• a~~# ..~.a~ F . r r • ~ }06 ~ & . `'SA` fi r~~,~'_"~'~~: ~,•~r.i~::1' 4• ~ 2 ~ . e f ~ V& 0-0 ~ C~ ~Z.~p~ ~ ~•tT = 4' t, °.~c - ~ = 2-7 ~ ~s pr;,- Co e'-7~~.) - ~ ~ L ° 4-Cr 4 2.. 19 q, -1-~ 4b-o + 3•55 A = 7Z cl -j'. 2-4 Inland MEMO ❑ PRaJECT P a c i fic CALc. p JaB No sHEEr oF ~ Eng'r neerr ng - MEETiNG El ar DATE w est 707 71h, suite 200 5po kane, wa5ninycon 99204 pTHER CJ CHK'D 8Y DATE 4 509 458-&840 Fax No. 509 459~"i844 ' - , :a . ~ A I~ S P O K A N E C O U N T Y DEPARTMEM OF BUICD[NC wND PLANNWC • A DNtStOiJ OF THE PUBLlC WORKS DEPARlMENT fAMES L. MANSON, C.B O, D[RECTOR DENNIS M SGOTi', P E., DIRECtOR September 1,'1995 D O E Office of the Attorney General Attn: Doug Pineo Ecology Division, PV-11 4601 N. Monroe, #202 Olympia, WA 98504 Spokane, WA 99205 RE: SMA-192-95 Pursuant to the Shoreline Management Act, I am forwarding to each office che following documents regarding the approval of a Substantial Development Pernut for construction of a walking and "exercise station" trail around Shelley Lake recently acted upon by Spokane County. l. Pernut 2. Board of Counry Commissioners Resolution 3. Application, related maps and information 4. Aff vit of Posting 5 . idavit of Publication 6. gal and Posting Notice 7 SEPA documents, if any . Pl ing Analysis 4OM ~ AS G. OS R, AICP P RECF~V ED Senior Planne: c: N& H In f estme s, c/o Agent: Richard L. Mason MAR 01 Enclosures SppKANE COUWY ENGINEEA SE.P - R 19~5 HDlSN{A DOETRANS LE'LM Z~S9T90DADH'AY AVENUE • SPOKANE, WASH(NCTON 99260 Bu[tDtNC Pt-toNE: (509) 456-3575 • Fnx (509) 456-4703 PLANNING PHONE: (509) 456-2205 • Fnx• (509) 456-2243 ~ ~ s y . ~ i tAm S E' ~ I~ A N c N'I' Y DJEPAFtTivtENT OF BU[LDENG AIJp PLArillVdNG • A diViSt[]N QF THE P~[76LiC WORKS 17Ed'ARTMENT ]RhdES L. MANSC]N. C 8 Q, DFFiECToR DENNi5 M SCOTT, t' E. D[RECTOR SHOTtELIlNE MANAGENMNT ACT {7F 1971 SPOkCANE CQUNd'Y 5HOREL£NE PRQGRAM STJ$STAN"['IIAX. DEVF-LOPMENT FERMTT t FOR L[JCAL GOVER,NNIENTAL, USE nNLY Application Nfl . Admunlstenng figency SMA-192-95 Sk'C}KANE C+DLJNTY Date Receiued: ApProveei: .Tune 9, 1995 Resvlution No. 95-0987 Type of Action(s): Detued: Substantaal aeWelopment Pet7nit hflA Pursuant to Chapter 90.58 RCW, apertnit as hereby granted to: N & H Investmen[s tv undertake €he foUowing develapment: Cvnstruct a walking and "exercise statian" trail around the circurrference of the lalce, including sma]lT favt bridges where needed. The pathway, exercise statians, descnptive narrative about some of the geolagic and natural features present at the site, landscaping and pQSSibIy a well with an outfall to the laice bn order ta mainKain water leael during drrier periods of the year is alsa anticipated. Also incfuded in thus permit is develnpment of streecs, storrn water management areas and specufative single farWiy dvuelZings and normally agpurtenant residential features, including fencing. Ali of these narc-rrad features are to be greater than SQ feet frvm the cJrciinary High Water Mark. Qn the foliowing property: Generally vvtthin 200 feet of the Ordinary High Water Mark of Shelley Lake Ttie site is wiekun 5helley Lake andlar its assacaated wetlands. A. MA5'I'ER PRC3GR.A.N[ PRC3VISInNS: Refer tQ Pianning Anaiysis, Sectians N. V, VT arad Vrl The prvject will not be withln a Shoreline of Statewide Signaficance (RCW 90.5$.030). T'he project wili be located wattun the Ruraf Designation. [f acondi[zona1 use or vafiance, aPso identafy the pvrvari of the master pragram whach prouades that che grapflsed use may be a cvnditianal use, or that pvrtion of rhe master pragran being vaa-ied: A26 VIIFS'[' $AOAOWAY AVENU£ • 5PG73CANE. WASH[NGTOE•P 49250 Bu[LD[NG P!-ioNE:- (544) 456-3575 • FAx (509) 456-4703 ~ ['L.nrrrvrNG PxoNE (509) 455-2205 • FAx (509) 456-2243 I' ~ i~ ~ ~ , , File No. SMA-192-95 SHORELINES MANAGEMENT ACT PERMIT Pagc 2 B. PORTIONS OF MASTER PROGRAM FOR WHICH VARIANCE IS REQUESTED: Not applicable. C. CONDITIONAL USE: Not applicable. D. COIVDTI'IONS OF APPROVAL Development pursuanc ro this permit shall be undertaken pursuant to the following terms and conditions: I. The applicant shall obtain any necessary Hydraulics Project Pernlit from the Washington State Department of Fish and Wildlife. I1. The applicant shail obtain any necessary Water Quallity Standards Modificauon Pernut from the Washington State Department of Ecology. III. If historical or archaeological artifacts are discovered during conswction, the applicant, heirs, assigns, agents or contractors thereof shall immediately stop construction and notify the City/County Historic Preservation Office and the Washington State Office of Archaeology and Historic Preservation. rv. A F1ood-Plain Development permit must be applied for and issued by the Spokane County Engineer's Office. V. The [rail location shall be guided by the most recently submitted supporting documents. This guidance is in the form of a performance standard for trail locaaon for various sections of the lake, as identified on the recenily submitted maps, dated July 31, 1995. Prior to trail construction actually beguuung, the applicant shall stake the center line of the trail with markers identified at a minimum of 100 feet and a maximum of 200 feet apart. The marking shall be closer where the trail craverses difficult terrain or is negotiating a horizontal curve. The Shorelines staff of the Building & Planning Division shall inspect . the trail center line before construction takes place. The Eastern Regional Department of Ecology staff may be involved in that field inspection. This (staking) may be waived if a civil engineer or surveyor licensed in che State of Wastungton will certify with hislher seal that the trail shall be located as per the drawings dated July 31, 1995. HDlSMA•192-95 PERMTI' ~ • . File No. SMA-192-95 SHORELLNES MANAGEMENT ACT PERMIT Page 3 VI. The Building Section of Lhe Building & Planning Division shall review Lhe construction detail and plans of foot bndges prior to commencement of construction. - VII. Prior co commencement of construction, Lhe applicant shall submit to the Shoreline staff of the Building & Planning Division a landscaping plan which shall address the vegetation and revegetation of the shoreline area, including a reasonably detailed description of the frequency (number) and types of vegetation to be establisheci, with a focus on plants that are native or indigenous to this area and would be hearty enough to survive the dry, hot climate and Lhe gravely, stony soils prevalent in the area with little or no u-rigation. Particulas' attention shail be given to the scarified areas wtuch w,ll be disturbed dunr,g crwl construction. The landscaping plan shall specify an 80% survival race for over a 4-year penod oF time. A major element of the landscaping plan shall be the control and elimination of the noxious weeds presently dorrunaung the shoreline envuonment. VIII. The plans for the area shall include no intrusion of private fences into the 50 foot setback (from the OHWM); although, properry lines may occastonally extend into the 50 foot setback. If property lines extend into that setback, the covenants shall clearly specify that the native vegetation of the 50 foot setback shall be maintained and that domestic grasses and domestic ornamental shrubbery are not to be planted within that area. If the crail area intrudes into any of the lots, easements shall be granted for the trail for that specific lot and shall be recorded in the proper Spokane County recording location. The shorelines staff of the Building and Planning Division shall review and approve covenants related to the shoreline area for compliance prior to construction. This may be waived if suitable safeguards exist. IX. This 5ubstantial Development Pernut covers "speculation" houses to be occasionally constructed on the lots surrounding the lake. These houses shall not exceed 35 feet in height above average grade level. These dwelling units shall also not intrude tnto the 50 foot area, including overhanging balconies, decks and any roof overhangs in excesstve of 2 feet from the face of the building. Fences associated with each lot shall not intrude into the 50 foot setback area. This pernut is granted pursuant to the Shoreline Management Act of 1971 and nothing in this permit shall excuse the applicant from compliance with any other federal, state or local statutes, ordinances or regulations applicable to tlus project, but not inconsistent with the Shoreline Management Act (Chapter 90.58 RCW). This pemut may be rescinded pursuant to RCW 90.58.140(8) in the event the pernuttee fails to comply with the terms or conditions hereof. HD(SMA-192-95 PERMIT File No SMA-192-95 SHORELIN6S MANAGEMENT ACT PERMIT Page 4 CONSTRUCTION PURSUANT TO THIS PERMIT WILL NOT BEGIN OR [S NOT AUTHORIZED UNTIL THIRTY (30) DAYS FROM THE DATE OF FIILING AS DEFINED IN RCW 90.58.140(6) AND WAC 173-14-090, OR UNTIL Ai.L REVIEW PROCEEDIlNGS INTTIATED WITHIN (30) THIItTY DAYS FROM THE DATE OF SUCH EILING FiAVE TERMINATED, EXCEPT AS PROVIDED 1N RCW 90.58.140(5)(a)(b)(c). . UPON DI2ECTION OF'CHE BOARD OF SPOKANE COUNTY COMMISSIONERS (Date) Thomas G. Mosher, A1CPT Senior Planner II. FOR DEPARTMENT OF ECOLOGY USE; ONLY IN REGARD TO A CONDITIONAL USE OR VARIANCE PERMIT (Date received by the Department) Approved Denied This permit is by the Depaitment pursuant to Chapter 90.58 RCW. Development shall be undertaken pursuant to the following additional terms and conditions. Date Department Authorization HD/SMA-192-95 PERMTT _ ~ . •..i.~ JV../ ' . , ~ • I • I I ' S P U K A N E C ~C~ 1J N T Y DIVLSIUN OF ENGINfFR1NG AND ROADS • A DLV[StOtv OF TH~ pUBLIC WORY.S DEPwxTMEN1 Williain A. johns, P E.. County Engineet U~nnjo- M. S,:ott, P E. D'uector f February 28, 1996 ~ "I'odd Whipple, P.E. ~ iPEC ~ ~ YIA FAX i ; 5UBJECT: P1750 - SheUey Lake P.U.D. Road Piaas ~ Review for Retease of Sewer Pecmit ' ; Gentlemen: ~ : We have conducted a cutsory review of the road plans for this projFcc, in order to assist you ;R obtaining ihe release of a permit for the sewer line constructian. We would like to note the following concerns: , 1. Vertical curve lengtti: ; The vertical curve at Rotchford Drive station 32+00 does ncst appear to provide adequate stopping sight distance for che grades, terrain, and road classificition involved. The Design Deviation approved by the County Engineer on 18 Jan 96 note,; thac the Rotchford Drive alignment, outside the statians of the horizontal curves becween stalions 16+98 co 22+82, and stations 34+98 to 39+87, is to be designed to the standards for alCollector Arterial in "flat" terrain. i 2. Grading and Erosion Control Plan: ~ , The Conditions of Approval for this plat (Engineer's Co ition /#36) requires that a Grading aitd Erosion Controi plan be in place prior to any disruptiot of che soil on the site. This ptan was submitted on 13 Nov 95, and returned with camments t IPEC on 27 Nov 95. Uur records indicate that this plan has not yet been resubmitted, nor ap$roved. I i I 1026 W. Broadway Ave. • Spokanc, WA 99260A170 • (509) 456-3600 FAX (509) 320-A78 TDD• (509) 324-3166 ~ . I I Todd WhiQple, P.E_ ; P1750 - Shelley Lake P.U.D. Road Plans ~ Review for Retease of Sewer Permit ~ February 28, 1996 Page 2 of 2 ~ I 1 have discussed these items with tt►e County Engineer; he has determined that these concerns need eo be resolved prior to che release of the sewer cvr~struction permic. 1f you have any questions abouc this review, please contact Ed Parry at 456-A0U. Thank you. , Very truly yours, ~ 1 Willtam A. lohsu, P. E. ~ Spokane County Engineer ' ~ Edward J. P .~Jr., P.E. ; Plans Review Engineer ~ Cc: Spokanc Cuuncy Public Wurks: Deucus Scoct, P E. Spokane Couaty Engineer: SsSl luhns. P.E. , Spokaru Counry Utiltlics: Bruce Rawls, P.E. 9i11 Hemmings. P.E. ~ project file iCVICWCt I Projecc Spotssar: Buseer Heiulian ou Landmark BwJdero (via fax) ( I ~ I ~ f I ( i ~ ~ I ~ ~ I ` TOTAL P.03 . ~ ~ . - . , ' 4 J ~ f. ~ . j L - r , ,y, . ~ ~~CKLIST 0QA-&.V anu T ~ PRQIECT # RE'+ITEW # Z- REUIEWER ~ DATE: get Mao PRoJEcT: (A~ ~ ~ PR[]]EC'I` SPONSOR: A N - TEL # PRO]ECT ENGINEER: TEL # (Road d`r. T7rainage PlastS) T'RO7ECT SURVEYCIR: TEL # (Ptai) ADMIM5TRATWE REQUIRENIENTS re. ~v 0 h1A ~ 1. 'Ihe $100.00 fee and Agreemeu[ ta Pay Fees for plat reuiew have been accepted by Spokane Caunty for this submittal. , Ves Eg~~~~ ww ~2. The Reaiew F~ .4ccvunt is current (uo in~•oices vver 30 days outstanding). r~ ~ r.~ 13 NI,, El 3. I haue noted' the plans in, plaas vut dates on the pinic sheet in the file. va El N. ❑ H,A la~-q. If this is a m.obile home park project, plans were routed ffimugh Planning? r.s 0'rio F] rvrA 11 5 The file conr.ains a Spokane Cnunty Eugineers 5ectican mag, Assessors's map and aerial pho[o. 1. E] lo 0 N~~ G. Fietd review made. If yes„ complete attacfaed fonn "Fielrf Review Repar[". PLAN REVTEW REQi]IRE MEIV'TS ra 0 rO E] wA E]' 1. 2 copies o€ the plains and a bvund dralnage report were subrnitted. v~ HIA 0 2. '~e glans are an 24" x 36" stieets. ~r~ E`a~ ~ nriA ❑ 3. The plans and calculations are scamged. P1ans musc be marked "1Preliminary" or "Not for Constructiou" if they are not the final approVed p[ans. FicW plans iuust be signed aad dated by the responsible Wasbingtou Srate Professianal Engineer. Y. N. 0 HIA D-- -4- The develpper Las signed and apgroved the Final Submittal of the road and drainage plans. V. ~ HIa ~ S. T1ze Sfantiard Plan IVotes haae been included on the plans. Y. Bn ~ nrn 0 fi. The project is lracated in the Aquifea Sensitive Area. Y. ❑ No 0 rrIA 0 7. List arxy design deviation reque5ts and ttieir status: ~ Yes 2"M"O N/A Lsrcate the Findings and C3rder fvr ¢fie project and list any tinusual conditions: - ves QrNo C3 NEA E] 9. Street na-mes are con,sistent wiCli P1at. FLt]ClD Zf71YES Z V. " IJ wR ❑ 1. Does the entire plat 1ie outside af designated 140-year Flood P1ain Area? r~ ~m IJ xrA El 2 I7aes the entire p1aC lie autsiae af 2one "B" of the desi$xiated Flood Piain Area7 yes 0No El NiA❑ 3. IS the maac. &treet ponding in aiiy part of a Zclne "°B" less rhaua 1'? rn'Q,~ El wn El 4 Does the plat canrain ap ro,~riate Ia~,age lymiting the Zowernost opeming in a structure 1vc,ated in a Zone "8" to nvt less t1~an 1' a~orae the lowesC road eleVa[ion? v.0 r.OwA0 5 Is the entire pzQject 1Dcated autsicie of an iden[ified Flood Plain Area"? r4U 0 No El NrA El 6. ls the entire project lacated outside af an idenCified SCortnwater Manageateent Problern Area? cklistv4 Ollan95 3- . I ~I ~ s RDAD PLANS 1. List axiy rvads iliat niust be designed and co«structed asi the prnject NAME RC],A~,D~NAI1tE tfRfll~i6NAML I RCIAANaG I 1iOAD NrVuif' ~ KpA1.7 NAME " dtOAD Ci_AS5 ~ N D - I Cr~~ (--,G'va Cc? f [!c.`f~72 I ~ "['Rr1FFIC ENI]EA (1) ~ I I ~ I TERR,,1N ~ I ~ I I I - PAVF, U WIkJ'I'fi RIW WII7TIi I ` I I ~ I - PC1S'IED SFEED Uf:SIGM SFECD : MINDAUM GRADE I l I ~ I ~ MAXUVIUM GRADE STGPPUYG SIGHT DI5I`AIYCE MINIMUM E~ORZ CURyF TYg~~~~~RB REQuMED MiN ASFIIALT SEC1'ION MTN G92AVCL SECTION ~ ~ I I 1 I ~ I ~ ~ I I I (I)'rRAr•E-[c eND,Cx: Major t1,cteria1 7; 5ecqndary Arcerial b; Collectar Arterial 5; LocaB AccesslResidential 5; Private 4. ra El Ho 1:1 n,~g 2. Placuung condi[ions require suhinission aF a landscape plan. (NCYTE: Usually assvciaied with FU17's). Ya ~ Ka 0 NIn ❑ 3, 1 tiaae cliecked the laijdscape plaia agaiiist tlie raad aizd storrn drarnage design aiid kkhere are the fallUwiug c6nflicts: vp ~ N. 0 N„►4. The followiug roar] pluis liave a hearitig on tEie desigia of roads for cius project aud acppy is iii R1ie tile: vq ONoON,A❑ 5. Vertica7 cun+es rneet stapping sigtn riistance requirements. vv 0 N. El NIn 0 C6a ~1n "R" Value TeSt is required fQr ~'his prQject. ~ , ~ rua ~ Fvr eacti soil group an "R" Va9ue Tesfi has been subnaitted for each sail group for this project. rd 13 N. El rrrn, 0 7 Is the betich mark sliawn on the plans? v. El N. 13 x,A 0 7a he pa►+eineiit secriozi is adequate foc tlie "R" V31ue TeSt and reqUired Ci'affiC index res 1:1 N* E3 xi 8. )Are stationing equations shvwii'? El N. O,a~n EJ 9. ds statioiiiiig correct (soutky ta viarttm, west to east, readitig left to righ[ oii [!ie plaui}? v.Erb❑Nrn E1 10 Are existitig utilities sliowii Qai tiie peaiu {or an inforniakifln capy of the utility p6aiis submitted}'? v-L]N-ONiA❑ 11 Are propoSed u[ilitie5 Sliqwia oii the p1au& (Ur aii iiifUmid[iou a:opy of the utility p1ans subniitted)? res El m ❑ NIn El 12. T1re project plaii iwiie iaiatcfies die plat zmraie. cktistv4 Ollau93 2 a ~ ~ , A • d's 13 1 STREE'1 ~'T~1EN1NGIIlN``E~*.SEC TT{~I11' V~'IT~-I EXISTIhiG CQ[TNT'' F~OAI] v~ Q rre ~N~A 0 13 Are curb design Slieets provided for wideniiig ❑f existiiig streeCS? res 0 r~O E3 NoA 0 13b. Uoes tlie Gurb de5ign coiiFQnra ta 5pokane Councy 5taiidards of seccion cross slope (Between 2 9'o and 4 5 9'0)? NlE''0 No 0 N' ai Is dhere a street crass Section stsc+wn for widerung existing screets`i r" 1:1 No EIn,,a 0 13d. I7oes die grc7posed riew wtdtfi match ciie widtfi reyuired in the Findings attd Order? ti°- N- 0 nIn E] 13e. The cross-section siiows° Extstiiag RIW, PrQposed RIW, and atiy requirer9 Future Setasicfe. vt- EJr+~ ONrA0 13f 100' {nzitz.) gauemeiit tapea into prajecC i5 Stiown v- ❑14 E) nIn p (I) There 'rs adequate RIVsr €ar ttie taper Co extentl frarai the new pa►+ing widtll to exisiing pauement. res Ej ro ❑ r.,A 0 (2) There is inadequate RIW for the taper to exGend frnzii the iiew paving wiclt7i ta existing paVemetst; taper xtends frvm existing paving to R11~+. r~ ❑ n~ ~ H~n T3g. ngeh c~f pae~enmenC fia,~er out mf praject m~ts. WS'-60 fnr design speeds 5 40 niph, WS far design speetls ~ 45 mpti, or feet iias 6een approved tay Spakane County Traffic Engineer. v~ ❑ N. ❑ n,A❑ 1321. Traasitian from end of curb to existting paving is 5lipwn (curb shauld nose down in 12")- veSOxo Orv,n D 13i. A 4"-wide, white paiutW fogline at 12" £t'om the edge oF paVitig is indicatecl (tapers or taligents). r. El~q 0~u. ❑ D ,qre the curb grades, for any required curbs, a6aVe die county niiiumuna of 0.8 V. 0 Ns ❑ nrrA E] 13k. The curb cype meet Spokane Caujxty Staiidare4s. v-s ~~o 0 tvrn Q 14. NE, V4' STREE'1'S _ v.EJNQ DnIn D 14a. Daes the proposed alignment nieet Spokane Coutaty Siandards? ti=ss E] NOEINr,a E] (1) Centerline sfopes are within 5pokane Cvuuty 5taildards. v~ 0 No H„ 0 (2) Verticai curve lengths are adequate for intersectifliis and stopping sigh[ distance vEa ❑NuEl rarA L] (3) Horir.4ntal currre cadius meet SpUkatie C+aunty staridards. Y. pNoEl N,n 1:1 14b. The plaiis sliow the typicaq cross section for streets. t•~, ❑ N. Nia [71 14c, Ilaes the proposed street wicJclz njatch the Fiiidings aiid (Jrder? Yes EINOE] NrA 0 14d. Tfie typical roac9 crass-section shows- Existing R.IW, Prop4sed RIW, and any applicable Future Setasrde. r~ 0Na ❑ H,n ❑ 14e The typieal road seceipia an the plails siiornjs the cross slope aiid it is tivithin the 25vo to 4, 5% standard Va El No❑ n/n 0 (1) Tfae Cross 51vpe as evrrect wben cliecked Qn the profile drawings v- Cj rreC] N,A C] 14f. Curb type: Is shown and is the propose type for the road ctassificatian. - vm E3No ~N,a 0 (1) Meets 5pokane County Road 5taiidards for curbs wi[tiin the public rigtit-of-way. res 13 rra ~ ruw ~ (2) C4tisistetat with the curb type in the general area. , V. El NQ E] NIn El 14g. Are the curb grades above the coutity miniinwn of 0, ra Q N. 0 rrin 0 15. Lacaeio2is where wacer is intetided tra flow tllrouglr ari iidet or curb cut are at the low poiaic En Vertical curve eklsslv4 411an45 3 ~ , . ves❑~. 11ne,~❑ E6 S1GIZiAGE FL,HLPd ►le4 ~ N„ ❑ n,n 0 16a. Stop 5igiis are sl~owii for a21 streets whicii intersect aiY arteesal (Check witll Cnutzty Traffic Engilteez if tliere is a question) ,•es ❑N. Q Ntn 0 15b. Streec iiaiiie stgcis are sliawn at all iiitersecaiiig streets. +r,s ❑ Ho 0 NIn 0 1 Gc. Is there a need for barriers at the end of d2ad end streets9 veadN. 0 NrnE] 16d fs chere a need for other speclal signing? (CIseck witlt ttie Couiicy Traffic Eiigineer). V. 0 mp 0 h~AF-) 17. Has die Fire District appraved a!l propQSed privace road turiiarouiids chat are substandard accnrdiug; to aur SpOlcasie Courity Raad Standards? rrs ❑ N. E3 K,n 0 18. C[]Ftl3 RETURNS xt, D N. 0 N,A El 18a. Are BCR, MCR, $ild ECR SQaL10llSIeIetr2lY1o175 0j7 Cl1Lb CeCI.lIILS 5lli3tiVI1 lII CLle p1i3I1 V1eW? ves E3No O' Non ❑ 18b. Are tfie curb recurii eleuatiatis correct? Vd ON5 ONu O 18c. Is tiiere positive draioiage frvni tlie road intersec[ivn to the MCR? ra ONO0Nra O 18d. Curb refir.im radius meets ttie Spakane County 5candard minimum {to back af curb for rolledlwedge curhs, ca face for uertlcal curb face kypes}? ►•es 0 no ❑~~A L3 18e BCR, 1vICR, aiid ECR eieuattoris are set ta allow drairiaee from the cenBerline to cfie curbline'? Ya E'N.OWn O 1$f. BCR, MCR, and ECR elevatiaiLS at itytersectis~iis wsthouc stcsp sig» crsntrcal are set 5o that rlie superelevatioib between che intersectian and elie curb]iiie does rtot exceeel' (ref AASHTO) lf]% (flat terraiti), 8°lo (rolliDig terraiai), 6%a {e7tountainous terrain}. Yes Ll N. ~ NIA IJ 19 LULrDE-CUACc,~l. yes E3 N. ~ ~~A Cl 19a. 7"he cul-de-sae grades (tc3p of Gurb) rrieet cauizty cul-de-sac scandards (1 % man,) ~M C3 r,+A d 19b. '6`he cul-de-sac curla is shown in profile. 0 N. ❑ POa 0 19c. 'F`fje cul-de-sac radius I31eet 5pakane County Standards. v.. ❑Nb'0 N,A 0 19d. The eenter of cul-de-sac Stat9on is shvw+ti. Ve3 0 N~ 0 rQIn 0 20 TNT'ERSECTIONS a•. Ej N. 0 ai+A E71 20a. Itttersectioi3s roeet AASHT[? sight distance requsreinents, vp 0 na ❑rqrn ❑ 2017. ln[erSeCtion separatioil i5 greatee thaii [7r equal Eo 150' vsi iocal access streets an[l 300' of arterials •a. rd DHa 0rr+n d241c. Do tlre iditersectiQrjs meet ttie landine requirenietits7 va ❑ N. [D rr,A ❑20b. Wheelchaiz ranips are provided at intersectiolis witli sidewai[ss Yu0 xo0 xm ~ 20c. T7je in[ersection lzoriaQntal 5igtit disrance aDalysis skiows that sight tEiatigle eiicroactunent aii private property is 2' or less for coiitrolled ititersections, ,•a E] N. ❑ nrn ❑ 21 Is ihere a lieed for slope easeniextits? ektistv4 t7f1aiz95 4 ~ ~ ~ R • i•~ ❑ tio 0 nrA ~ [SRAINt1GE PLANS .es 0 El yIn 0 1 Has a plat inap been subniitted W[1lC]l St]OWS lpt CjSIile115iC7Y15, street widtlis, etc.? Y. p' V~ ❑Nan E1 2. F3Q►5IN MAP Ya El N. 0 n,n LD 2a NortEi arroRrr aiid scale is shawn 0 N'a Q NIn D 2h. 5uhbaiiis zre labe9ed atid cQrEelated witlt calculativeas. res 0 xa ❑ NIn O 2c. 171ras aiiiap witli Coiitour5 spnt e9evatioiLS SubtttptCed to prnperly detennine draiiiage hasins`? El No E3n,In p 2d. W1tere the rautes used io deteniiiiie tin3e af cooYceiitratioji skiowlx? V" ❑ aQ 0 „in D 2e. Were all existiiig drairiage courses sliowel;? 1 C3 E] LQ 11 NrAL3 2f Were all die praposed draiiiage courses sliowii? v"❑.b 0 NAED 3. Were HydrQlpgiC calcula[i¢ans sul7rniTted for eacli basin7 (Rational Fprmula rf area :s; 10 acres, 5CS TR-55 i f area > 10 acres). e•e, L) tiQ ❑ nIn ❑ 3a BasdEi includes affsi(e argd oii.5ite areas togetlier (use SO year aiia9ysis). 11 %_~o yes no, 0 NtA 0 3b. Basin is all oiisite (use 10 year starm). Yzs ❑NG 0 N/h Ruuoff off rate far basiix is canipared ta imperious road area ruiioff race Tlie larger rate cnaitr«Is ciesigii COATVEYANLEIL}ISPDSAL ves ❑:,,o Q rvn ❑ 4. Pipesl Culverts - if, yes, c[rniplete checklist sectian for culverts aiid pipe-systenas. vW 0 nb 0 NA❑ S Ditchies are identified in plaiis and details peovided. ►•C. 11 ni,► C3 b Are tliere aiay cniiflicts heeweeii the proposed c9raiiiagefields arid any ditc3ies on (he drainage plaii) ,•e_ 0 tia 0 n/n E] 7 Gut[er flnw degth vs Eess thati gutter hetgtit, ►•esovbONIn O Baekwater - Arialysis for aiiy pipe atidlnr ditC9ies was subtiiitted. Vez E3•q El NIti L) 9. headwater - Calculatioiis for culverts were subniitted far review, 1 u E).U El NIA 0 10. Cur'b droplcurb ii-dets are used in the coiiveyaiice. Plaim aiid calculation for flow capae'sty have beezr suhuistte[] ti-e's EI.Q 0 r.rn 11. F~iprap is required for erosian prc~tecCiaii aiid calculatiqtis liave bee~i suhtnitter~ f~ar re.+iew s•~ ~ wEn1AO 12. Seils type is "pre-approaed" (Garrisoii, etG.,) ffor drywelis with4ut pereolatioii tests. Y~ pN.E] rq+n 0 13 Draes the drain~ge repart ideiicify die SCS soil groups fear the prerject area aaid fpr tlie praposed raads co be built izi the project area? I ~ Q•9 ❑Nih E3 14. Tlie drairiage desigii maiiitaiiYS Slieet flaaa pattenis in natural watercourses. ►es [40 0 n,n ED 15. T1ie draiiiage desigii maiiicaiiis exsstitig sheet f1ow pauerrms witliout conceutrasiiig flows , D,a E) h,n E] 16. Tlie cfr-aiaiage coiicept is compatible wiili plaiuiiiig eotiiziiissiaii requiremezits. ,•c, Q.O 0 nIn 0 17. Tlie difftreiice between preseiit atad future flows is retaftied aii the site. ,.s o..❑;.,n 0 18. A decejitiaii basiii eoueept is proptrsed for stomlwacer cfispQSal. If, yes, use separaRe cliecklist foi CULYERTS AND PIPE SY5TEPVfS ~ q•f, 0 no Q H,A Tlte road culverts aee at the low poiuts of streaun flnw, V" El r.o El rr+n 0 2. 7'lse lieadwater was calculated for cul uert etitraiices aiid is uz3der 2 diamelers for culverrs uEider 1$" s:i diameeer aizd i S diameEers for culuerts greater tltan k 8". ves 13.-,. ❑ rrrn ll 3. Tliere is a Qiilfiinaum of 12" ❑f coVer far all culverES and storni sewer pipes Yes 0 na [3 HIn d 4 The designer lias elemonskrated dhat die progosed ipe 6s suitab9e Far co►•er less ttiait 2.5' (PVC), 1 5' (CNE P). 1'(RCP} (HLIPElADS) or the enganeer Eias pr[aviged trenct'i details for upgradeti pipe becidiiig for tliese areas ,0 El N. 0 ,vIAO 5, Tile f171TS1Iilllll] VeloG1Ty WStlilll illE I]]pe SySIen1 iS 4 feet per secoiicl at riesigll flow iii a backwater colid;tiolt (Noce: Tiie Coudity Eiigiiieer iiiay peniiit ]oaaer ae16ci[oes}. ie. C] n- C] nrn 0 b. Tiie backwater calculatioiis sEiow aiziiiumuin freeboard af 0.75 Feet for each t;atcii Faasin or maiilzole Yzs ❑N6 0 r,r,. ED 7 The iziiuiiiiuiat culuert and pipC slope is 0.5 % aud all pipes iiicet nr exceed this stand,ard .e4 0 N. 0 Mn Q 8 All aiigle points in the storen sewer system haae suitable acces4 sutti as a Zuanhole for clcaning I vs 0N.0nrn D 9. At 1oeatioiis vuliere two ciiffereiit pcpe sizes enter the sante mavifivle tlie D 8 diwiieter poi arts of eacli pipe ai e at die saiiie eaer+atioai. (Note: Exc;ept`s_o[i allowetl for dmp ntaidzoles]- ,~s [D nan 0 1(}. ls there aTiy dawtisiz'ritg vf pipes in a systems of pipes tEiat are 18" iiti dianteter atid siiialler Yoa El N. Q Ntn El 11. There is a eiflwcisiziiig ofi pipes iii [lie aninunt of 3" fl7C a 1t11111I]1L1113 i]f 100 fee[ 1[1 il p[Z]G' SyS[elll [Ela[ Ci}I1[illlls pipes thaC over l$" iii diwiieter. t;kPitisv4.0llan93 ~ 5 • v. 0No ~ N/A 12. A11 pip~.s ia the ipe system are 12' a.ud 8arger as per Sg~kane County Standards; ipe that is allowed far co~eetion ov Lnlets tQ catcli basi~ ar drywelis, if d~e letigdi does not exceed 44 L~and the ve[ocity is aC least 4 fps). vei ~ N- ~ rru ~ 13. All stQrm sewet' pipes are located a miaimum af S feet from a rear or side prraperty line and haae adequate easements far maintenance. rO El NO 0 Nia E] 14. dailets an the same Sl[spe are located s4 that the tnaximurry widili of spread for the guffer flow daes zidt exceed f' (from curb face for Type "A" ar "B", from bacCc of curb for Type "R"). res El rr- E3 NrA E] 15. T"he plans and profiles shaw all culvert pipe types, stations, af£sets, [engths, aiid inverts. ves Q r4. 0 K~AE3 16. Pipe materials rneet cnanty standards for systems that lie witliin county kQW. (Note: 'fhe cype of pipe Zn pnwate systems may be as specified by the design eregineer). .~a El N. E3 xn. E] 17 T'hc eulverts shown are properly sta¢ianed fram centerfnne statiouing. re, 0 N. 0 rrrn d 18. DQes the drainage systern configuration arroid conflicts ►vith underground utilities? r" Ll r-❑N/A Cl 19. Ts there a need for energy dissipatian on a,ny af the culvert outlets shovvn on the plans? res 1:1 rm 13 m,. El 20. Ts chere a need ior rap rap around the cu1vert autlet at any of the cul►rerts as progosed nn the drainage plans. rq El ro 0 ruti E] 21. The rip.rap that iS shawu for the drainage plans is adequate for the culverts wtiere erasien is aconcem and the enganeer has subrnitted acceprahle np rap design calculations. yes Q r,~- d~/A Cl 22. Pipe anchars are stiawn fox pipe grades greater t.han 15 ra ❑ rio ❑ aun 0 23. There are na instances where waeer is trapped against afill with na culaert stiown. r-a ❑ ro d xeA Ll 24. Profiles and cross sectiuns are showu on the plans for all proposed channeis and ditches. re, El rw ❑ NrA 0 25. Ditches with eroding velQCities have a prnper llning for erosian pratection, ves E]rw 0 NIp El 26. Water witI properly flotiv from an existing or proposed ditch an co the pavemenc as proposed on the draitiage glans. r~ 0 r,1- ❑ HIA ❑ 27. Wheee the ditch profile passes fram cut to fill the €law lias been properly disposed UiLETS Yi" El r40 d N/A El 1, The inlets shown are wiPWn the stream flow. Y. ❑ N. ❑mk Cl 2. liilets are shawn au the low side of a road or at the lovv point of avertical curve r-IIn-Elm,► El 3 Curb type meta1 inlets, if prvposed, are shown at sags and are praperly sized Y. 0 ro El N,R 11 3a. Perimeter r.alculation dQes not include the side af the grate against the curb face (al1 grate types). vu ❑ ro El wA El 3b. F'erimeter is divitled by 2 far calcuiations where no curb ogening (T!,pe 1 see standard URWG B-lfl) is prodided. ,ra E]roOw,►O 3c. Area = clear acza = 2 for Type 1gratesy rC3 El m 0 a~~AE3 4. There are no Tong vertical curves that produce flat caunter grades which Gould pose a grpbiern wich pouding water in traffic lanes. Y. ❑ N-El rrfn 0 5. Tl}e centerliile road statians, offsets, and inuert eledalians for all mlets are stiown in the plaui profile wiews. Y. E3 w ❑ m,►0 6. GCate LypC 15 ShC1Wl'1 OII the plaI1 aIId 15 aCCelpTc'ibte. (S[1f7kdI1e Ci51iIIfy Seandard inlecs or WSDt]T standard inlets R€JW, on private~raperty other rt~let ty,pe may be specified) ~ype 1: T7-2; Type 2: D-4 in pld 1981 stan ar ty~: I , sheet 10,type 2, sti~t B~1 ~fQr 1995 staudards . Y-s 0 rra 0 rrre Cl 7. Adeta'ri drawing raf the gratelcurb installatian is shvwn ou the lans and includes a minimum 1" depression and tra~itic~ns ~ per cvunty s~iddards fvr grates rhat are locate~withxn cDUnty R{]W, raE refereuced ta SCAS std. detail D-8 in 19$1 standard5 or sheet 8-18 in 1995 standards. res d NoEJ wA 11 8. A eurb cu¢ detaiZ is shpwn on the plan5 wiih the new ceunty baGk dr~p wvith transftians and a 1" depressioii f€rr ~curb cuts inside county R4V~, ar referenced tv SCRS std. detai[ af the 1995 standard drawings rp 1:3 N. 1:3 NiA 13 9. Thhe plans shaus acceptable curb cut details and grate details for installations wbLich !ie within private roacl easaments. For ,plans that are subject to 5pokane Ccaunty Reuiew. Y. ❑No❑ wA ❑ Zd. If iii1efs are in a gravel road or a dirt ditcli a 6' x C,' A.C. apron is shflwn around the inlet. Yn C] N- 0 wn E3 11. Catclx basin or special maniltofe details are sEicawii or astandard drawing is referenced. vm C3 ro d HIA d 12. Critiea! Eow pvints in the drainage system have been paavided with aVertlow easements. VVliere it is possible. 208 SWALE SYSTEMS ra E3 r4-E1 rvA 11 1 . T5 the swale [ocated aut5ide a fucure set asitie area? See Finding5 aud (3rder fDr wtaece setasides are required res 0 M EIruAE] 2. The swale brtittnm and sides liave sod csr gra55 turf speciE~etl. V. 11 r.❑ NrA O 3. 5wale side slo,pes da uot exceed a3:1 side slape. {A 2;1 side slope is allawed if swale deptli is less than 12" dee,p. Shcauld onIy be allqwed where constrained i]y obstacles) clsiiscv4.0llan95 6 ! - ~•"O.,, OWn O 4. [f depth of water from bottom to drywell rim is between 6 and 8 inches. soil mixture lias been specified whicli meeL5 Spokaiie County Guidelines. Ye. 0 n„ 0 wn 0 5. Drywell is: Located witlun 8 feet of the curb line, or a maintenance access route and easeiiient are provided. Yef 0M, ❑ n,n ❑ 6. Drywell stationing is staggered from the inlet by at least 4'. ,C• O.O 0 nIn O 7 Multiple drywells are located nuire than 30' (center-center) apart. N e}0 ,,,E]"A ❑ g. Soil type is appropriate for drywells (perc iate ? 72"/Iir), If not: ves 0 No 0 nIA 0 8a. Overflow from a swale at a low point will be directed away from buildivg pads by an identified easemenc over improved ground or an existing natural draiiiage channel covered by an easement vcs 0 No 0 n/n 0 9. Drywell location does not conflict witli underground utilities. N•0 0 No 0 N/n 0 10. Drywel I type is specified. ves 0 No E3 n,n 0 11. Drywell grate type is specified (Type 3-std. detail D-7 For 1981 standards or type 4, sheet B-15 of 1995 standards.) N•« E3 N. E3n/n E3 12. Drywell #rate elevation is: A miiumwn of 0.4" below tlhe normal flow line at tlhe curb inlet and is between 6" aud 8 above die swale 8oor elevation. v.s 0 No 0 Hu E1 13. Does the uote: "Wrap the drywell widi a filter fabric (Amoco 4545 or equivalent)" appear on the plans? 14. Swale tloor elevation is: N-ez E3w 0 NIn 0 14a. Specified. ves E3 no E3 wa IJ 14b. Between 6" and 8" below the drywell grate elevation. ve, 0 na 0 n/n [D 14c. At least 6" below the nornial gutrer flowline at die curb inlet for swale without a drywell. Ye. E3 N. 0 nIn E3 14d. At least 10" below the nornial gutter Flowline at the curb inlet for swale witli a drywell. 15. Swale Floor. ve, 0 No 0 rr/n E3 I Sa. Duuensions are showu. 1.s 0 N. 0 n/n 0 I Sb. Miiiiniuni area is sliowii. ve, E3no 0 wAE3 I Sc. The area matches or is larger dian che required area from the 208 calculation for impervious areas. 16. Easements for the 208: ve.. 0 No 0 nln 0 16a. Are shown on die drainage plaiu. v« C3 No 0 N/A 0 16b. Are shown on die subdivisiou plat and match the drainage plaus. Yes 0 No 0 r,IA E3 1 Gc. Are of adequate size to contain at least 6" freeboard above the max. water surface elevation for the design stonn. ra 0 No 0 n/A 0 16d. Are tied to the lot corners. v. no 0 nIA 0 17. The side of the swale that is tlie furdiest distance from the street should have a top of swale elevation that is higlier tlia❑ the Iiigliest water level of tlie swale. N•m 0 no E3 n/A 0 18. Tlie invert at dhe curb iiilet is at or above the max. water surface elevacio►i for die design storni or the max. water surface will not pond water more tlian 12" in residential streecs or G" in arterials. .,s 0 N. D.in 0 21. 208 SVVALES Nes On.0nIA 0 21 a. 208 swale tloor area, volwne requireuients sized properly to treat impervious surface areas. vu 0 No 0 n/A E3 21 b. 208 swale volunie provided ii► accordauce widi "Guidelines for Stonnwater Maiiagement". EASEMENTS Yes E3no 0 r„A E3 1. Adequate draiiiage easements are shown for mainteiiance of drainage ditches or pipe systems. v« C3 N. 0 r,/n E3 2. There are easements proposed ar existing for natural chaiuiels which cross the properry, and they are adeyuate to pass the 50 year stonn plus a 30Io added deptli of flow for a safety factor. N«On.Onrn O 3. A public drainage easement was provided where puhlic saeet drainaee was diverted outo private property. Ye. 0 N. 0 wA 0 4. The perpetual mainteiiauce of private systems lias properly been provided for. Yea0 N. 0 NIn0 5. The niaiuteiiance of draiiiage sysrems within Spokane County ROW lias been properly plovided for. 1« 0 N. 0 wn 0 G. A~propriate draiiiage language has beeu provided by the reviewiug eneiueer to the surveyor and/or eugineer w io is involved with tlje platuug work. vt. 0 N. 0 N/n El 7. Pre-existinb drainage easenients on this parcel are not affected by this plat )u Or.o C3r,/AO 8. OverFlow easements are provided from swales/ponds located in low points where it is possible. ck1istv4.0/1an95 7 ~ Ya0 no0 nu0 UNDERGROUND GRAVEL GALLERIES CHECKLIST v- 0 ,a D,vrn 0 I. 3 void ratio for bravel free space volume is used ,•es 0 No 0 n/A 0 2. Perc rate from field test is used to develop outFlow rate ves 0 No 0 n/n 0 3. 10-yr eveut volume is contaiued entirely unclerground ve, 0 N. 0 wA 0 4. 100-yr event volw»e is contained by a combiiiation of underground storage and above ground srorage up to 8" depth . v~.0 no 0 r,/n 0 5. 100-yr event volume is contained by a combiiutian of underground storabe and above ground storage exceeding 8" depth 1•« 0 N. 0 nIA 0 Sa. Soil mixture is specified for water depdi in pond exceeding 8" N'«0 rro0 NU0 6. Entire gallery is wrapped in filter fabric va 0 Ho 0 Hu 0 DETENTION POND Y.0 no On/A o 1. Releases to a dow►istreani chaiuiel or pipe syscem diat is capable of holding che proposed flows and does noc cause dowitistreani flooding. ves 0 No 0 Hrn Cl 2. Contains 50-yr develoPed. va 0N. 0 nrk 0 3. Releases at 50-yr pre-developed. vp 0 N. E3 NJA 0 4. Secondary overflow to pipe in control structure for 100-yr developed i•u 0 xa 0 wn 0 5. Emergency overflow weir for 100-yr developed. v« [3 N. 0 wn 0 6. Sump prior to outlet to control structure. vu 0 No 0 NIn Cl 7. 1' min. freeboard. 0 No OnIA 0 8. Grassed,sides/floor for publicly-maintaiiied pouds or dryland grasses specified. va 0 N. 0NIA D 9. Spriiikler system for publicly-maintaiued ponds or dryland grasses specified. v. 0 N. 0 nIA 0 10. Berni compaction and lift requirements specified. V. [3 N. 0 NIn E3 11. Is a 12' maintenance drive co the bottom of po►is needed? If so maximum grade is 6: t. 208 LOT PLANS CNECKGIST ve3 C:] No C] n,/n C3 1. Lot plans are required; submitted on Y.3 O N. ❑ NM 0 2. The 208 lot plaiis show: vO 0 N. 0 wn E3 2a. The lot number, block number, subdivision iuvne, date drawn, scale, and north anow. i u 0rro Or,ME3 2b. Dimeusions to lot coniers V. E3no 0 wn 0 2e. D rai nage easements Yu 0 no 0 n~A El 2d. Secback reyuirements na IA E3 2e. Swale Floor elevation ~ v« E)no 0 nIn D 2f. Swale floor dime«sions Y. 0 No 0 run El 2g. Rim elevation if drywells are presetu Y. 0 No E3 nrn 0 2h. Curb cut station, offset, invert and leugtli Ya 0 no E]nrAO 2i. Any drainage ditches Yu E] No ❑ N/A C] 2j. Shows deptli from the rop of the curb IJ0 r,o 0 wA 0 2k. An attached cross section of the swale or ditch Y. E) N. E3nrn 0 3. Lot pla►is have been stmitiped by a professional eugineer on all pages N-u 0 no E] nIA E3 4. Lot Plaiis are of sufficient scate to maximize che lo[ size to the 8 1/2" x I 1" paper size. (Drawings may be on plaii► wliite paper) , 0 J3 n/n 13 5. 208 lot pla►is were appmved ou ck1istv4.0/1an95 8 ~ El2O5IL}N & SEI7EWENTATd(7N CONTRC}L REQ[]TRE,MENTS ~'a 0 na 0 rrrA Q 1 1dencify die clearing aiid de'sturbed areas iii die plan. T1i'ss rncjudes cuts and fills a9ong slopes. Minimaze the anouiit of cleared area. v-OHU ON,a O 2. Proaide erosioii cantrol facibities wtlicfl slow water velocities -diroug@a the use of check danTS, debris ba5iiis, etc v~ ON.ONIA 0 3. Filtea runoff ftom exposed areas prior to riischarging into drainage ponds attd partrCUlarly prior to directing runaff iiito drywells. Filtering measures included in.stalling temporary silt traps, silt pcands, gravel cQne fiPiers, etc. In silt kraps and prsnds, ssxe setiiment storage volumes by determining the aniQUnt of silt materia, geneeated dver a6 month periad, using the F[axman Method. 1'he silt traps and pvnds are ta grovide a settiug zone, and are to be sized in accardance with the method outlined in Section 11-5.$.6 and I1-5.8,7 4f the WDOE 5tormwater Management Manual. xa 0 H. ❑ rqrn 0 4, Stabilize exgosed areas as soon as practical aFter grading work is complete, or when grading work wi11 temporarily cease for more dian _ .In wet winter montiis, temporary stabiIixation measures will be requured tliraugiiout the duratron vf canstruceion. Specify stabiIir.a¢icrn procedures, revegetatioti requiremeiits, mulclung, etc. Specify tlte maximum time diat cleared areas are to be exposed w"rthout protection or stahilizatiuv and tin1e of year. Y« ❑ Ho Or.,A ❑ S. Stabilize draivage cliaiinels Provide for cemparary and pernaarient erasion protectTOn iiieasures Y-ON~ 0 Nin ❑ b. Prvvide fflr perimeter trarners around exposed areas tiirougfi ttie use of sift fences, stravv bales, teinporary inteaceptor ditches, eic. Raute run4£f fr0a1 unexpQSed areas arotand expased areas wherever prac[ical. ve- 0 N4 0 wA 0 7, List routine maintenance prQCedures to be °rmp9etnented by the Coiiiractar throug'hout the duratioii of constructiQn Silt tra,ps, silt ponds, check dams, channel restoration, etc. All will require fairly constant maincenance, especialiy during and inuuediately foliawing a raiii storm event. Y. El 0 rriA 0 8 Reduce the amount af mud, dirt and racks transported onto puhlic rvadways by mvior vehicles ar r-untsff hy constructing a sta6ilization pad af rock spalls at endrances to construction site. v. 0 roo [Dwn Q 9, PCoVI(Ie 5pec131 pToWISlC1L!$ fCTP Ci)Ii.STTL[CCloEl 13I1deI' W@L $easL}Il COTIdlfipil5. QeFIIe the Seil.5CfI1 Yes El Na EJ NIA 0 10. Provide final restQi'atipti proGeduCeS. eo-. rp E] No O r,rA E] 11. Include in tt e plans the stanciard ESC noces prepared by 5pokane County. ekliuu4 Qllao45 9 • FIELD REVIEW REPORT va ON-OHrAO 1. Field inves[igation trip made on v« 0 r+o 0 N/A 0 2. Report completed and put into file op Y. 0 N. 0 ruA 0 3. Are there any existing utilities on the pro}ect site? (Overhead power, fire hydrants, etc.) If yes, describe. ve, 0No 0rv/n 0 4. Are the drainage basins on the ground the same as those that are presented in the drainage report? Ya 0►vo 0 N/A 0 5. Are there any drainage channels directed toward property? v« 0 No 0 w,► 0 6. Are there any draiaage channels direcdng water ihrough the property? va O N. ❑ N/A 0 7. Do County roads cut off drainage as per drainage calculadons? vd ON-❑ N!A o 8. If there are culverts under county roads, does the flow go away from or toward the project? Ya 0 No ❑ N/A O 9. What kind of ground cover exists? vp 0 N. 0 rvu 0 10. Describe any existing channel conditious: vu 0 N. ❑ N/A El 11. Describe channel cross section: Y. 0 No ❑ N/A 0 12. Existiug Curb Type: .a. cklisN4.0/7an95 10 C 1~ ~ N~ F` 1, l SPOKANE GQUNTY ENGVNEERS STQPPfNG 51GHT D15TANCE CALCIJLATIC]NS Date: 06-Dec-95 SAG UERTIGAL CURVE Fteaiew 1 Reveewer: Parry Project P1750 Project name. 5helley Lake P.U.D. TerraEn: x Flat (General land sYope 0°Io tca 8°Io) Raliing (Gerreral land sEope >8% to 15%) f Mountains (General land slope >15%) RC7AD T1fRE: IJrbanlSuburhan Semi-eurallRural Public PubIiG ' Lvcal Access Arterial x Collector 5ecorrdary Major Private ' Extensian to 8 ar fewer Iots Tract "X" Pnvate Road name: Rotchford arive PVI station: 12+50 Length of vertical curve pravided: 100 Design 5peed: 35 Min ;toppirtg Sight Dcstance: 275 Entering slope (G1, °Ia); -6.00 Exiting Slvpe (G2, °14): -2.85 G2-G1 l= A= 3.15 Gheck 5>L- L1 = 2S -({400+155}IA} Ll _ 117 46 Required minimum cun+e length: 117.46 Check S<L: Cunre provided is Toa shart L2 = A(S**2)1(400+3. 5S) L2 = 174839 vxun2 l1Aug43 i SPC]KANE COUNTY ENGINEERS STQF'PING SIGMT Q15TANCE CALGLJLcATIONS Date: 06-Dec-95 SAG VERTICAL CURVE Reuiew # 1 Reaiewer Parry Frojec# F"1750 Praject name: 5he1ley Lake P.U.D. Terrain x FEat (General land slope 0% #0 8°Io) Ralling (General land slope ,8°1o to 15%) f Mountains (C;eneral land slope y15°Io) 'RDAp `fil'PE: Llrhanl5uburban Semi-curallRural Public Pubfic Lacal Ar.cess Arterial x Gnllector Secondary NEajor Private ' Extension to 8 ar fewer 1vts Tract '}C„ Private Road name: Rotchford Drive PVI station. 12+50 Length of vertical curve provided: 100 Design Speed 35 Min Stepping Sight Distance: 250 Entering skvpe (G1', °Ia) -6.00 Exiting Slvpe (+G2' -2.85 G2-G1 m= A= 3.15 Gheck S,L; L1 = ZS -((400+3.5S)fA) L1 = 95.23$1 Required miraimum cunre iength: 95.2381 Check S<L. Curve provided is Adequate L2 ° A(S**2)](400+3.55) L2 = 154 412 vswvl 11Aug93 ~ SPOKANE +COUNTY ENGINEERS 5TOPPIN+G 51GHT DISTANCE CALCUL.ATIDNS aate 06-Dec-95 SAG 11ERTICAL CIJRVE Review 1 Reviewer: Pamy Praject P1750 Project name: Shelley Lake P.U.D. Yerrain, x Flat {Genera9 Eand slope 0% to 8°Ia} Ralling (General lartd slape >8°Jo tv 15°Io) f Mountains (General land slope,15°Io) RQAa TYPE: UrbaniSuhurban Semi-rurallRural Public Rublic ' Local Access Artenal x Gollector 5econdary Major Private ' Extensivn to 8 vr fewer Ivts Tract "K" Pri►rate Rvad nsme: Ratchford Odve PUI statimn: 15f00 Length af vertical cunre pravided 100 Design 5peed: 35 Min Stvpping 5ight Distance: 250 Entermg slope (Gl, °Ia): -a 85 Exi#ing, Slope (G2, °Io). -1 fl0 G2-G1 l= A= 1 85 Check 5>L• L1 = 2S -((400+3 5S)IA) L1 = -183.19 note- use min curve length = 0 Required rninimum curve length. d Check S<L: Curve provided is Adequate L2 = p(5**2)I(400+3.55) L.2 = 90.6$63 vsuN2 11AugJ3 SPOKANE C9IJNTY ENG1NEERS STdPPiNG SICHT ❑ISTANCE CALCIJLATIDNS 'C1afe- (]6-Dec-95 SAG VERT4CAL GU'RVE Review # 1 Reviewer: Parry Project P1750 Project name: She'lley ILake P.U.D. Terrain° x Flat (General land slope 0% to 8°Io) Ralling (General larrd slope 38% ta 15°Io) f M❑untains (General land slope'15°Io) FtQAD Tl'PE: Urbanl5uburban Semi-rurallRural Public Public ' Lor-al Access Arterial x Callector Secondary Major private ' Extensian ta 8 or fewer lots Tract "X" Pnvate Raad rname: Rotchford Drive PV! station: 15+00 Length of vertical curve prvVided: 100 Oesign Speed: 35 Min. 5topping Sight Qistance• 275 Entering slope (G1, -2 85 Exiting 51ape (C2, °Io) -1.00 G2-G1I= A= 1.85 Check S>L: L1 = 2S -{(400+3.5S)1A} Ll _ -786.49 nate: use m i n curve lertgth = t}. Required minimum curve length: 0 Check S<L: Gurve provided is Ad'equate L2 = A{S*"'2}1(4(]Q+3 55) L2 = 102.683 wwrv2 l l,aug43 SPOKANE COIJNTY ENGINEERS 5T0'PP4NG 51GHT D1STANCE CALCLJLATI4]NS Date: 06-Dec-95 5AG 11ERTIGAL CIJRVE Review 1 Reviewer: Parry Project P1750 Prvject name: 5helley LaVice P.U.D. Terram: x Flat (CeneraE 1and saope 0°lo to 8°fo) Ro1Ang {General land slape >S% tfl 15%} f Mflun#ains ({General land slape >15°Io} ROA❑ TYPE' L1 rbanlS u burba n 5emi-ru rallRural Rukalic Public ' Lor.al Access Arterial x Cvllector 5econdary Major Private ' Extensian ta 8or fewer lots Tract "X" Private Road name Rvtchford Drive PVR statian: 19+25 Leng#h of vertical curve pravided: 310 Design Speed: 35 Min. 5topping 5ight Distance 275 En#ering slope (G1, °Io): -1 00 Exltlng Slope (G2, 4I[l~, 5.50 G2-G 1 A= 6.5 Claeck S>L: L'i = 2S -({400+3.55}IA) L1 = 340,385 Required minimurn curve length: 366.78 Check S<L- Curve provided is fioa shart L2 = A[5*`2]I(400+3.55) L2 = 360.78 .~uTva IrAug93 SPCJKANE COUfVTY ENGINEERS STOPPING SiGHT DISTANGE CALCtJLP+TlON'S Date 06-Dec-95 SAG VERT9CA~ CURVE Review 1 Reviewer: Parry Praject P1 TS0 Project name SheiCey Lake R.U.D. Terrain• x Flat (General land slvpe 0°la tv 8°Io) RoIling (General land slope ,S°lv ta 15'DIo) f Mountains (General 'land siope >15%) RoaD rYPE- urbanfSuburban 5emi-rurailRura1 Public F'ublic ' Local Access Arferial x Co1lector Seconciary Majvr Private " Extensian to 8 flr fewer lots Tract "X" Private Road name: RatchFard arive RVI stativn 19+25 Length of vertical curve provided: 310 Design Speed: 35 Min. 5topping Sight Djstance 250 Errtering slo,pe {G1, °!o}; -1 00 Exiting 51ape (G2, °Io): 550 G2-G1 l= A= 6.5 Gheck 5>L Li = 2S -{(400+3.55)IA} Ll = 303.846 Required minimum curue length- 318.621 Check S=L Cunre prouided is 70o short L2 - A(5**2)1{400+3 5S) L2 = 318.627 vcurN2 llrlug93 I~ I ! SPOKANE C[3lJNTY ENt;INEERS ST[]'PP6NG SIGHT D15TANGE CA'LCUL4T{ON5 Date: 06-flec-95 CRES7 VERTICAL CURVE Review 1 Reviewer Parry F'roject P1750 Project name: Shelley Lake P.U.O. Terrain: x Flat (GeneraG land siope 0°Ia to 8°Io) Rolling (General land slope >S°la tfl 15°Jo) f Mauntairas (General land slope,15°Io) ROAQ Tl'PE. UrbanlSuburban Semi-rura9lR+aral Puhlic PLIbIiC ' Lar.af Access Arterial x Callector 5ecandary Major Priva#e ' Extension tv 8 ar fewer Ivts Tract "X" Private Road name: RotchFord ❑riVe PVI station: 23+00 Length af vertical curve provided: 330 Design Speed: 35 Min. 5topping Sight Distance, 254 Entering slope (G1, 5.5[] Exiting Slc7pe (G2, -2 OD G2-G1 l= A= 7.5 C'neck S,L: L1=25-(13291A) L1 = 3228 Required minimum curve length: 352.109 Check SCL: Curve provided is Too short L2 = A{S**2}11329 L2 = 352709 vcwv2 11Aug93 I SPQKA'NE CQUNTY ENGINEERS STOPPING 51GHT DISTANCE CALCUL4TION5 Qate. 06-Dec-95 CREST VERTICAt CURV'E Review 1 Reviewer: Parry Project P1 75v Project name Shelley Lake P.U.D. Terrain; x Faat (General land slope 0% to 8°lo) Rolling (Generaf land slope >8°lo to 15%) f Mvuntains (Genera4 9arad slope ,15°Ia) RQAD TYPE Urbanf5uburban 5emi-rurallRural Publrc Public ' Lacal Access Arterial x Gollectvr 5econdary Majar Private " Extensian to 8 or fewer lots Tract "X" Private Road name- Rvtchfflrd flriae PVI station: 23+00 Length o# vertical curve prvvided: 330 Design Speed• 35 Min Stopping Sight Distance: 275 Entering slope (G1, °lA): 5.50 Exiting 51ape (G2, °Io), -2.00 G2-G1 l_ A= 7.5 Gheck 5>L- L1=2S-(13291A) L1 = 3728 Reyuired minimum cunre length: 426.778 Check 5<L Curv+e provided is Tov 5hort L2 = A(5'"'2)11329 L,2 = 426.778 vcun2 l IAug93 SPrJKANE GDIJNTY ENGINEERS STdPPING 51GHT IDISTANCE GA'LCLILATIQNS Date: 06-Clec-95 CREST VERTICAL GURVE Review 1 Fteviewer: Parry Praject P1750 Praject name: $he11ey Lake P.U.D. Terrain. x Flat (General land slope 0°Io tv 8°1fl) Rolling (General land slope >8% ta 15%) f Mountains (Genera9 land slope >15°r'a) aoAa rrPE: lJcbanfSuburban Semi-rurailRural Public Publie ' Lacal access Artedal x Gallector 5ecoridary Majar Frivate ' Extension ta 8 or fewer Eats Tract „X" Private Rvad name: Rotchford [3riae PVl stativn- 23+00 Length aF vertic.al curve prauided° 330 Design Speed: 35 Min Stflppmg 5ight Distance: 225 Entenng slope (Gl, °Io): 5.50 Exiting 5fvpe (G2, '010)° -2.00 G2-G 1 f = A= 7.5 Check S'L: Ll=2S-(13291A) L1 = 272.8 Required minimum eurve length 285.694 Check S<L: Curve pravided is Adequate L2 = A{S**2}11329 L2 = 285.694 vcurv2 i~~ug93 P I I SPOF{ANE CQUNTI' ENGINEERS STC]PPING SIGHT Q15TANCE +cALCfULATIQNS Date: 06-Dec-95 CREST VERTICAL CURVE Review # 1 Reviewer: Parry PraJect P1750 Praject name: Shelley LakeP.U.D. Terrain. x Flat (General land 5lope 0'0r''o to $°1a) Rolling (GeneraV land slope >8°Io to 15°lo) f Mountains (General land slape >15%) ~OAD TYPE llrbanlSu6urban Semi-rurallRural Public Public ' Loc.al pccess Arterial x Cvllectar 5econdary Majvr Private ' Extensian ta 8 vr fewer lats Tract "?C" Private RQad name: Rotehfarti Drive PVI station: 28+54 Length vf aertical curve provided 100 Design Speed: 35 Min Stapping 5ight Qistance: 275 Entenng siape (C1, -2.00 Exi#ing 51ope (G2, °1Q): -3 90 G2-G1 l= A= 1 3 Check 5>L L1-2S-(1329JA) L1 = -149.47 note use min curve length =0 Required minimum cun►e length- 0 Check S< Curve prvaided is Adequate L2 = A(5--2)I1329 L2 = 108.117 .cur02 IrAugB i i SPOKANE COIJNTI' ENGINEERS 5TC]PPING SIGn'T DISTANGE CALCULATEDNS Qate: 06-Dec-95 5AG VERTICAL CIJRVE Review 1 Reviewer. Parry Project P1 T5v Project name: Shell'ey Lake P.U.D. Terrain: x Flat {General land slope 4°IQ to 8°Io} Rolling {General larrd slaqe >8% to 15°Ia} f Mvuntains (General 9arad slope >15°!v) RdAD TYPE- llrhanlSuburban Semi-ruraYfRura! Pubfic PubEic ° ILQGs7j AGCeSS AI'tef1Sl x Go4kectvr Secondary Majvr Private ' Extension to 8 ar fewer lats ISJ11 Tfa\.L i.. Private Road, name: Ratchford Drive PVI stativn: 32+00 Length of vertical curve provaded- 260 ~Design 5peed 35 Min. 5topping 5ight Dastance. 275 Entedng sfvpe (G1, -3 90 Exiting SEope (G2, °Io): 1.52 G2-G1 l= A= 5.42 Check S3L: L'1 = 2S -((400+3.5S)Ia) L1 = 298616 Required minimum curve length. 300.835 Cheek 5<L: Curve provided is Too short L2 = A(S*"2)1(400+3.5S) L.2 = 300.835 vcun<2 llAug93 i i SPflKRNE COUNT1( ENGiNEERS 5TC]PPING SIGHT D15TANCE CRLCULATIC)N5 ❑ate. 06-Dec-95 SRG VERT#CAL GURVE Review 1 Reviewer- Parry Praject P9 750 Praject name: She4ley Lake P.U.D. Terrain: x Flat {Caeneral Cand slope 0°lo ta 8°Io} Rolling (General land slope >8% to 15°!v) f Mvuntains (General land slope > 15°Io) ROAD TYPE: UrbanlSuburban Semi-rurallRural Public Pulafic ' Loca9 Access Arkenai x Col@ectar Secondaryr Majar Private ' Extension to S mr fewer Iots Tract "X" Private Rvad name: Rotchford DriVe PVI stativn: 32+00 Length af vertical curve prvvided: 260 Design Speed- 35 Min. Stapping 5ight Distance 250 E[1tenng slope (G 1, °lo): -3.90 Exiting Slope (G2, °Io) 1 52 G2-G1 l= A= 5.42 Check S3L: Ll = 2S -{(400+3.55)IA} L1 = 264.76 Required minimum curve length: 265.686 Check SCL Curve provided is Tan shvrt L2 = A(S**2)1(400+3.55) L2 = 265.686 vruiv2 srnuS93 SPOKANE COUNTY ENGINEERS STQPP6NG 51{GF1fi pI5TA1VGE CALCIJLATIC3N5 C3ate 06-DeC-95 CREST VERTICAL CuRVE Review 9 Reviewer: Parry Project P1 750 Praject name. Shelley Lake P.U.D. Terrain: x Flat (General iand slope 0°la ta 8%) Rmlling (Genera6 aand slope >B% to 15%) f Mauntains (General land slope >15°/0) ROAD TYPE LJrbanfSuburban Semi-ruralIRura1 Public Public ' Lacal Access Arfeda1 x Cvllector 5ecvndary Major Private ' Extensivn to 8 or fewer Iots Tract ")C" Private Road narne Ratchford Drive PVI station 35+00 Length af vertical curve provided: 300 Design Speed: 35 Nlin. Stopping Sight Distance: 250 Entering skope (G1, °Io)' 1.52 Exiting Slope (G2, °lo): -5.00 G2-Gll= A= 652 Check S,L: L1=2S-{'I 3291A} L1 = 296.166 Required minimum curve length: 306.622 Check ScL: Curve pravided is Taa shart L2 = A(S**2)f1325 L2 = 306.622 vcwVZ 1iAug93 SPOKAN'E COUNTY ENGINEERS STC]PPING 51GHT DISFANCE CALCU'LATIl7~S Date: 06-Dec-95 CREST VERTlGAL CL1fdVE Review 1 Reviewer: Parry Prvject P1750 Praject name: 5helley Lake P.U.D. Terrain: x Fiat (General land slope 0°Io to 8°Io) RoIIEng (General land slape'841o t0 15°lfl) f Mountains (General land slvpe >15°/v) RQAD TYPE: Urbanl5uhurqan Semi-ruraHlRural Public Pubiic ' Lmcal Access prterial x Coliectvr 5econdar3r Major Private ' Extension tv 8 or fewer lots Tract "X" Private Road name: RotcPaford Drive PVf stativn: 35+00 Length vf vertica1 cunre pravided 300 Design Speed: 35 Min. 5tgpping Sight Dis4ance: 275 Entenng sfope (Gl, °Io): 1.52 Exiting 51ope (G2, °Io): -500 G2-G1 l= A= 6.52 Check S>L: L1=2S-(13291A) L1 = 346.166 Required minimum cunre lerrg#h: 371.012 Check 5<L ClJNe pfOVIdEd 15 Toa short L2 = A(5**2)11329 L2 = 371,012 vcwv2 i/,a„g93 1~ ~ 1 ~ ~ 1 ~ _ s~pean~ irwwwe t.M~ LmPLA Puiln iram. • FM F~d W dryaYrn8r1 R'~~ ~.w p~..a r+.a. e. u nsi r lqin ea.e.r..~r. r-w m wmn~. as ~r ~ m m v in ~r ror w.r S.acA9rJ . m Tla m ~ ~u 90 m ~R zl ]J m lV~o RNic y~aw,yM Isalrim :mnri!lral ~ C~4rw YFWi~ PYfe iYr. ~ (r~l Aw~ Cwvf Ae~nYr NA~~ ~lilusLlp~ iffit~dit~ MIUCV iAULi~ffi Wf~A E¢nbv4sbn i.kt]C vr~ ~M[tN 31 'ta q '8.~ A "~1 6J '~l '~1 en.m.ve.~.,.m. .crrrm zs r+s as a ae n vs m as m im ~a vs r.~v m m an sa mo aa ~oo m yw ~n a~o ~ aa +x ~o you e . e~.~ n o r.,« aa rfla x 'win.~~"`w.r~~ro• +na...a. imenwcn. cr.~si~in. ai rn..r.a~e..w+sw vamea am ~n.~a.v..~*~a ~ .a cr~+prriw ~a..~ a.msr.+e + W saroascaw.~. m Mr ie.~er ~ ~..~nm+•o a~ o~t r .ac m ra.w+•M+~++w•.~• ~r~.rw..rrm K6.W r~Wa.rFr~~~~rl.er..wm~rypivralfi. [wel }l !ii ll.n 4:a•3`.,ry+Al u. ~m Cwa56. arwxs~wx irw~e w~rtwesrL~wsmB lA~~row~~zw~¢rwM1nMinrcwn~ 4]-.0^4}E9•3 ss7 'gylpg314q l]. ac~ A2 6a LUw.. sx ^,w~awp ea'{au5iineW~ewnr~mxsuwrem~[rw~n~w ~~ini c~v.~o'n~~p~.'r~rrnt.e.wam,~ .x.~m ~ 5PC}KANE CQUMT"( ENGINEERS STOPPING 51GHT DISTANCE CALCULfITlONS Daie: 28-Fel-96 SAG IAERTIGAL CURVE Review#' 'I Revieuver Parry Project # P1750 Frvject name. 5he1ley Lake P.U.D. Terram x F4at (General land slope []96 to S%) RallEng {General 9and sEope'8°!o to 15%} f Mountains (General land slope >1595) ROAD TYPE UrbanlSuburban 5emtirurallRural Public Puhlic ' Lacal Access LrscalAccess Rrtenal AL1Ts1 00 R COII@CfOr 100>ApT>400 SEGOIlCfaf}I Major County Hrterial ADTC4QQ Private 400<ADT<750 ' EctensEOn ta 8 or fewer lots ADT>750 Tract W' Pmrate Extension ta 8 nr fewer lats Tract "X" Rvad name- Rotchfvrd C]rive PVI station 32+00 Length of vertical curve prruided. Resign 5peed 40 Mirr 5tvpping Sight pisiance 275 Entenng slope [GI, 96j: -3 90 Exiting 51ape (G2, 1 45 G2-G1 p= A= 535 Check 5>L L1 = 25 -f (400+3 5S)IfIJ L1 = 295 327 Required minimum c+urve length 296.95 Gheck S< CurVe proVided is T rk iJS► 00 L2 = A(S"2)1(400+3 55) L2 = 29695 vcm,-Z 1fAa~3 SP(7KANE CC}l1NTY ENGINEERS STOPPING 51GHY C]ISTANCE GALCULATIONS Data 28-Feb-96 5AG VER7ICAL CURVE Rewew # 1 Reviewer Parry Project # P1756 Project name Shelley Lake P.U.D. Terrain x Flat (General land slape 09u to 8%) Rvlling (General land slvpe >8°fo to 15%) f Mountains (General land slope >15°fa) ROAD TYPE lJrbanISuburban 5emi-rurallRural Pubhc Pubhc ' Local Acvess Local Access Artenal ADTc100 ' Collector 3007ADT>400 5ecvndary Major County Artenal ADT<4i70 Prnate 404.cApT<750 x Esctension to 8 ar fewer Iflts AD7y750 Tract "X„ Private Exkensian ta 8 rr fewer lots Fraci "X" Road name Lane "D" PVI station 10+33 Length of vertical curve promded 150 Design Speed 20 Min. 5topping Sight L1istance• 720 Entenng slape (G1, -2 00 Exdmg 51op2 (G2, 120 G2-G1l= A= 32 Check S>L L1 = 25 -((400+3 55)!A) L1 = -16 25 note use min curve length = C] Required minimum cunre length 0 Check S< Curve proVided is Adequate L2 = A(5"2)I(400+3 55) L2 = 561951 vcw-✓: Ilk%93 SPpKANE COUNTY ENGiNEERS 5TC7PPING SIGHT DISTANCE CALCULATI0N5 Qate 28-'FeFr96 SAG VERTICFIL CURVE Revleuv#: 1 Reviewer Parry Project # P9750 Project name 5hefley Lake P.U.Q. Terrain x Flat (Ceneral land slope 0% to 8%) Rolling (General land stope >S% Ro 15%) f Mauntams [Genera1 land slope 71'S96} ROAD TYPE UrbarUSuburban 5emi-ruraVFtural F'ubhc Public ' Lr3ca3 Rccess Lacal Access Arterial AC1T<1 00 ' Collecfor 1 Q(>ROTs400 5ecandary Majar Caunty Artenal A[)T<400 Rnaate 400sAL7Ta750 x Extension ta $ nr fewer lats ADT>750 Tract "X" Pnvate Extension to 8 or fewer lots YFact "x.. Rvad name Lsne "0" F'VI statton 9 3+5i7 Length of vertical curve prosnded 10O Design Speed 20 Min Stopping 5ight Qistanca 120 Entenng slope (G1, 219 Exitmg Slepe (G2, 4 70 G2-G1J= A= 251 Chee'k S>L L1 = 25 -{(400+3 58)/A} L9 = -85 693 note use mm curve length = 0 Required minimum curve length 0 Check S;L Curue pravided is Adequate L2 = A(S"2)1{400+3 5S} L2 = 44078 vnw2vwvg93 SPDKANE COUNTI' ENGINEERS STOPPING SIGHT DtSFANCE CALCULATIDNS Date, 28-Felr96 CRES7 VERTICA,L CLJRVE Reaiew 1 Rewewer Parry Project P1750 Project name 5helley Lake P.U.D. Terratn x Flat (General land sfope O% to 8%) Rolling (General land stope s896 ta 15%) f Mounkains {Generaf land slape >1546} ROAD TYPE Urbanl5uburban Semre'uraU`Rura9 Public Pubiic ' Local Acceas Lccal Access Arterial ADT<10(] ' Crallecivr 900'ADT>400 Secondary Major County Artenal ADTC4fl0 Pnvate 400<ADTa750 x Extensson to 8 or fewer Rots ADT,750 Tract "X" Pmvste Extensivn to 8 or fevver Iots Tract "X" RoarJ nsme Lane "b" PVI station 17+12 92 Length af vertical curve pravided 50 ❑esign Speed' 20 Mm Stnpping Sight Distance 120 Entenng sfope (G1, 2 00 ExrUng 51ope (C,2, 96) -2 m[] G2-G1 J= A- 4 Check 5>L L9 =2S-(1329IA) L1 = -92 25 nate use mino curve length = D Required minimum eurve length 0 Check S<L Curue provided is Adequate L2 = A(S"2)19329 L2 = 433409 vrwft- v.vk&93 i~ ~ SPDItA1VE C[3UNTY ENGINEERS STOPPING &IGHT DISTANCE CALCULATIONS Date 28-Feb-96 CREST VERTICAL CURVE Rewew # 1 Revnewer. Parry Praject # P1750 Project name 5he11ey L.ake R.U.O. Terrain x iFfat (General tand slope fl°r5 ta 8%) Rolling (GeneraY aand slope ta 15%) f Maurrtains [General land slope > 15%] R[]AD 7YPE. UrhanlSuburban 5emi-rurallRural Public Pubfi€ ' Local flecess Loa} Rccess Artenal ADT<1 [70 ' Colleetor 100>Rf77>400 sscandary MaJflr County Artertal ADTa400 Rnvsie 4(10aADTC750 x Extensian to 8 Qr fewer lots A'pT>750 Tract "}C' Pnvate Extension tv 8 ar fewer Iots Tract °X' Raad name Lane"D" PV! station. 15+00 Length oi vertieal curve pravided: 100 Design 5peed 20 Min. Stopping 5ig?et ❑istance: 120 Entenng slope {G 1, 470 E)ating Slope (G2, 96) 2 00 C2-G1 J= A= 27 Gheck 5,L L1 =2S-(13291A) L1 = -252 22 nrste use min curv$ length = 0, Required mirnmum cunve length 0 Check 5cL Curve pravided is Adequate L2 = A(S"2)11329 L2 = 292551 vtuxtd_ VAUg93 i , SPC]KANE COUNTY ENGtNEERS 5TC7PPING 51CHT C7f5TAhIGE CALCLILATI❑N5 Date 28-Feb-96 SAG VER7ICAL CURVE Review#' 1 Rewewer' Parry Project P1750 Project name: SheAey Lake IP.II.0, Terrain x Flat (Genera4 land slope 0% to 8%) f Rtalling (General land slope >8°!o to 159b) Mountams (Geneeal land slope >95%) R(]AC) `fYPE UrbaNSuburban Semi-rurallRural Pubhc Pubhc ' Eacal Access Lvcal Rccess Arterial Af3T<1470 ` CtslleCtor 100aAC3Ta400 Secondary Major County Arkerial ,ADTy4QD Pndate 400<AiDTc750 x Extension to B or fewres fots ADTy750 Tr3ct ,.X' Prvate Extensian to S or fewer lats Tract "X" Road name Lane "D" PVI station 18+13 Length af vertieal curve proVaded. 50 Oesign Spaed ZO Min. 5ivpping Sight Distance 120 Entenng slope {G1, -2 00 Exding 5lope {G2, 9t,} 9 9$ G2-G1 l= A= 398 Check SaL Li = 2S -((400+3 55)IA) Li = 339698 Required mEnimum curVe length 33.9698 Check S< Curve provided is Adequate L2 - A(5"2)1(400+3 55) L2 = 698927 Vnuv2 vnU9Y3 SPDKANE CDUNTY ENGIIVEERS STORPfNG SIGHT E315TANCE CALCULATIONS aate 28-Feb-36 SAG IAERTICAL GURVE Re,,qew W 1 Rernewer Parry Pro}ect # P1750 F'rvject name 3helley Lake P.U.D. Terrain. x Flat {General land slope 096 ta 8%} Rafhng (General land slrspe >8% tm 1596) i Mauntains (General land slape > 15%) ROAD TYPE LJrbanlSubur6an 5emi-rurallRural Puhlic F'ublic ° Local ,Access Local A,ccess P,rtenaf ADTC1 Da ' Caifectar 1(]0aADT',400 5ecendary Majar County Artecial AOT<4UL1 F'rivafe 400<AQT<750 x Ez[ensian to 8 or fewer lats ADT9750 Tract "X° Private FattensiQn ta 8 vr ferruee lots TraEt "X' Road name Homestead Lane PVI station 17+50 Length of Vertical curve proVided 50 ❑esign Speed 20 AAin 5topping Sight Distance 120 Entenng slvpe (GI, -1 40 Exfting 51vpa (G21 2 00 G2-G1 l= A= 34 Check 5>L L1 = 25 4{400+3 55}IAJ . L1 = -1 1765 rsote use min csarve length = Q Fdequired mirnmum curue lengkh 4 Check 5< Cunee prowded is Adequate L2 = A(S"2)I(4(10+3 55} L2 = 597073 Vmm.vwVa i SPDftANE CDUNTY ENGIEdEERS STOPPING SIGFi7 pISTAryGE GALCULATIONS Date 28-Feb-96 CREST VER3ICAL CURVE Re"ewt # 1 Reviewer Parry Project # P1750 Project name Sheltey Lake P.U.R. Terrain x Flat (C3eneral land slope 096 to B%) Rolhng (Ggneral land slope >8% to 15%) f Mountains (General land slope > 15%) RaAO rrPE Urbanl5uburbars Semi-rurallRural Public Public ' Locaf Access Local Access ArterEal AOT<100 ' CQIlector 100>ACtT>400 5econdary Majar County Artenal AOTt40i] Priaate 400rADT~750 x E)Rensivn t4 8 ar fewer lotss ADT>750 Tract "X' Private Extension ta $ ar fewer lats TI"dCt "pi" Road name Hnmestead Lane F'VI staiion 18+1 G 97 Length af Vertical curve provEded 50 Design 5peed. 20 Min Stvpping Sight Qistanee 120 Entenng slape {G1, 200 E)ating SIQpe (132, -2 00 G2-G1I= A= 4 Cneck S>L L1=25-(l 3291A) L1 = -92 25 note use min curve length =0 Required mmtmum eurrre length 0 Check 5<L Curve prvu3dea is Adequate L2 = A{S"2}11329 L2 = 433409 %WW41ZvnU0 i I SPOKANE COUNTY ENGiNEERS 5TC]PPIAIG SIGHT C12STANCE CALCLILATIC]IV5 Qate 28-Feb-96 CREST VERTICAL CURVE Rewew # 1 Rewewer Parry Project P1790 Rroject name Sheiley Lake P.U'.D. Terrain x Flat {General land sloPe 0°r6 ta 8%} Rofling (General land slo,pe ta 15%) f M4untains (General fand slape >15%) ROAD TYPE lJrbanlSuhur6an Semi-rurallRural Puhhc Public ' Local Access Local Access Arterial A[3T<3 DO ' Callector 1 00aA[33a400 5econdary Majar County Rrterial ADTc40a F'rivate 400zAaTe750 x Extensian fo 9 ar fewer Icats 14DT,750 Tract"X" Pnvats Extensian to 8 er fewer lcrts Tract "X" Rpad name Homestead Lane PVI stafivn 1$+59 Lertgth oF uertical cunve provided 50 design Speed 20 Min 5toppmg Sight Qistance 120 Entermg slope [G1, -2.00 E)ating Slape {G2, 96} 39 G2-G1J= A= 439 Checic S>L L1=25-[13291A] L1 = -62 733 noie use min curve length =[3 RequireeS minimum eurve lersgth: U Check 5CL Cunve pravided is Adequate LZ = A(S"2)11329 L2 = 475666 Vc-vzslw~" 1 February 2$, 1996 Todd Whipple, P.E. IPEC NIA FAX SvB]ECT: P1750 - Sheuey Lake P.U.A. Road Plans Review far Release vf Se►ver Fermit Gentlemen: We have conducted a cursory revievv Qf the road plans fvr this prcrject, in vrder to assist yvu in obtaining the release of a permit for the sewer line constructicrn. We would like to note the follawing concerns: l. Vertical curve length: The vertical curve at RotCtafard Drive station 32+00 daes not appear to pravide adequate stopping sight distance for the grades, terrain, and raad classificativn invcrlued. The Design Deviativn apprvved by the Gounty Engineer an 18 .Tan 96 notes that the Rotchford Drive alignrrient, vuts ide the stativns vf the hvrizgntal cueues between stations 16+98 to 22 -#-82, and statigns 34+98 to 39+87, is to be des9gned to the standards fnr a Gollecter Arterial in "flac" terrain. 2. Grading and Erosion Cvntrvl Plan: 'Y`he Conditians of Apprvval far this plat (Engineer's Candition #36) requires that a Grading and Ervsivn Cflntrol plan be in ptace privr to any disruptivn vf the saii vn the site. This p1an was submitCeti pn 13 NoV 95, and returned with comments to IPEC an 27 Nvv 95. Our recvrds indicate that this plan has not yet been resubmitted, nvr apprQVed. il li ~Q~ST FOR DESIGN D~~ON $30.00 _ I?ATE DECEhBER 21, 1995 ROAU NA1NE R(]TCEIFORD DRM° GRP/RID # RIA NAMF, OF PLA'Z' SHELLEY LA~ „Plat.#• PE-1750-94 AI7DRE5S OF BLDG 1VAMIE OF BL,I3G PAU.TECI" 8iDG# H9 ----s, • 24 T 25H R' 44E',W,- FET]ERALISTATE PROJECT # FRO]EGT LBITIS SOUfiH OF 4"L'H AVENUE F~STIINC'r CQIVI7ITI+DNS: PR[]P{3SED R"Rfl VEMENT5: AC]AD WIDTH 40' F. C. TO F. C ROAD SiJRFACE ACF CLi` 5 AVG. DAILY TRAFFIC 400+ADT (DHV (40-150t) ' Current Traffc Couat DeOgn Year TrafEe Count PRO7ECT DESGRI'dIC]N PMIKruARY DESIGN OF RC3TCHIORD DRILVE/CDMI.IH ltOAD FAQM 4TH AVENUE VICMTY SODTH TD T"fS IENTC1 E%ISTING RDTCHFOltD DHIVE AT FLAT S(]QNI3AItY. PROPUSF.A DESIGN DEVZA'~ON Tt] REDUCE TSE MINIMUM DESIGN CURVES @, STA I6+96.02 TO 22+81.98 . APD 5TA 34+9$,.53' '1O 39+18.07" FROM° 410RADIUS Td 350 RADrUS, CUR1TE5• Wn.L BL m FUI,.,L SIJPER WITH PKAl" @O: Od► "°1Fr JU5'IMICAI'TON: SEE ATTACHED LETTER SL'►BNfi= HY T[}DI1 W'EIPFLE„ INLAND PACIFYC EHGTffEEMG, . IPG. DA'TE DECEMSER 21, 1995 AL}I]RESS 707 WES77TH AVMiUE* SQLTE 200„ SPQKANE, iiA . . ZI$ GflMDE 99204 PHfJIVE# (509) 458-6840 (FAA)" 458-6844 ADbUNISTRlTTVE yARIANCE FEE OF'_PO.% PAED Ta SPOKANE COUNTY 1026 vv BRoADwAY, SPoKANE wA 99260-0170 0NE (50 ~ FAX {509}324,3478 -REaUMT wILL Nar aE 0 CASWCELECK # RECEMI) BY DATE ~ ~ ~ ~ - ~ a ~w ~ ~ ~ ~ r INLAND PACcFIC ENGINEERING, IfVC. ]anuary s, 1396 W.O. No. 93143 Spokane County F'ublic Works W. 1026 Brvadway 5pokane, RVA 99260 Atm: Bi117ahns, P.E. Cvunty Engineer Re: Shelley Lake - pE-1750-94 Rotchford I)rive, Dcsign Deviation BiII: Per your ghone conversation today we were glease tv hear that you felt fhat a rvIl'rng terrain classification at Sheiley Lake was in fac# a valid deterrninatiQn. Therefore, based upan the acceptance nf the rvlling terrain ciassifcatian we wQUld like t4 subnnit to ycru a design deviation for two curves alang the prvpQSed Rotchford Dri►re alignment. As notei in the design deviativn forin, these two curves lie betweea 5ta. 16+96.42 ta 22+81.98 and betvyeen 5ta. 34+98.53 and 39+18.07. As you are aware the proposed ciasssificativn fnr Rotchford Drive is to be Collector Arteriafl. Based upon the design requirements as faund within the 1981 SCRS, the praposed design deviation is to reduce the minianum horizontal curve radius frozn 410-feet to 350-feet. Although, nvt being submitted under the new 1995 SCRS, the ne3v rvad standards allvw a rninimum radius af 350-feet fvr a Collector Arterial. In confvrmance with both the 1981 and 1995 SCRS, these minirnum radfus curves are expected to be in full super elerration with a side s1ape (e,.,1 not to exceed 0.04`Ift. Per aur previaus submittal regarding the rnlling cla.ssificatiQn we pravided the grapased raadway plan and profiles far Rotchford Drive, we would recanunend that yvu reWiew these docurrients for alignment infbrznation. Additionally, I have inciuded various excerpts frarn the 1990 American Associatian of State Highway and `Y'ransportativn Officials, greenbvQk which will a[low this reduction in radius from 410-Feet ta 350-feet. Should during yvur review you have any questaons please feel free to call. As was sfated in aur meeting an Friday (I15196), at this time we are ready to suhmit the street and storm draLnage pians for rerriew, therefQre, ya+ar attention to this matter is greatly appreciated. 'I71arik you. Sincerely, ' In1an Pacifc E ineering Ca., [nc. r • ' g[~~~Rj r) 1 Tvdd R. W3ippPe, P.E. ~ ..:etn ~ ~a ! ~~/tw 1 ~ ePICTaSuT@5 , tNGMEER cc: Landmark auilders, Suster Heitrnan , file 707 West r'th • Surte 2C10 2520 Lakewppd IJriwc • 5uite 205 Spokane, WA 99204 Cueur d'Ale++e, IL7 83874 509-458-6840 • FAJC 505-458-689+3 208-765-77&1 • FA}t, 208-769-7277 ~ . ~ 1 ~ 3.01 Urban/Suburban Street Design Requirements d?. : ~ A R T E R I A L S ~ ~ Roadwa Classification Local Y Co1lecCOr ~ Secondary ' Major ADT ~ Variable ~ 500-5,000 ~ 1500-40,000 ~ 1500-40,000 • 1 Flat 30 40 45 45 Design Speed (m.p.h.) Rolling 25 30 35 35 Mountainous 20 30 30 30 ~ Minimum Flat 41n955 955 Horizontal 2 Rolling ~~U410 560 560 ;j Curvature (feet) Mountainons 150 410 410 3 Desirable Maximum 8.0 8.0 8.0 8.0 Grade M Desirable Minimum 0.8 0.8 0.8 0.8 :4+ 1,2,3 1,2,3 1,2,3 1,2,3 Roadway Cross Section No. " Flat 200 275 315 315 - Stopping Sight Dietance Rolling 160 200 240 240 ' ~ (feet) Mountainous 120 200 200 200 ~ Within the above parameters, geometric design requirements shall be determined for specific roads based on ~ W.S.D.H. Design Manual and the Washington State Urban Design Standards for New Construction. ~ . ~ NOTES: 1. The deaign apeed is the controlling criteria. ~ Z. Values shown for horizontal curvature assume no superelevation. 3. May be steeper for short distances where permitted by County Engineer 2%), 4. Roadway width may vary with projected traffic volumes. Date: 8/13/87 • -12- ~r Hlinimum Tvpe ~ Urban Arterial Rural Arterial ~ ~~~~~nts ClasWflcation Principal {Contro!!ed F'rincipal . Mfnar Collector Minor ar Major Collector Acctss, (lJncantroiled) ~ Censtructlvn Curb Shoulder Alf AIN AIl Shoulder' IDT AII ~ All ~ All ►►ylll ►4l1 ~ Belnw 400 ~ 400-20[]0 Dver 20O(3 Uesign FCat 55 55 40 40 40 54 50 55 5peed (mph) Rolltrtg 50 50 40 35 35 40 40 5Q Mounfainous 40 40 35 30 30 30 30 40 Hatizontal Cunra Fdat 1990 1190 515 500 765 785 960 Radius2 {ft} Rolling 955 95s 500 350 35a 470 470 765 Mavntainous SDO 5i]o 360 230 255 255 470 5u,perefevatinn L%J Ma)dmum ~ 4 ~ 4 ~ 4 ~ 4 ~ 4 ~ g ~ ,g l 8 Grade a Ma)drnum 8 6 B 8 8 a 6 B M3nirnum 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 5topping Sight Fla# 450 454 275 275 275 400 400 450 ' Distance (ft) Rolling 400 404 275 225 225 275 275 400 Mnuntainvus 275 275 225 200 200 200 200 275 Intersectiore Sight aistarrceQ@ ~ AASHTa Chaeter iX'Sight Distance. "es 739-766 ' Crest VeMca'1 Flat 150 150 60 60 60 41(1 110 150 Gurves",' (K) RoliEng 110 110 60 40 40 60 fifl 110 Mauntalnous 60 60 40 30 30 30 30 60 Seo Verrtical Flst 400 100 64 60 60 90 90 100 +Curves",' N Rnlling 90 90 60 50 50 BQ 50 90 Mauntainous so 60 50 aa 40 40 40 60 See next paga for fovtnates. TABLE 3.01 ARTERIAL STFtEET DESIGN ELEMENT5 5pakane County Standards Page 13 January 1995 ~ ~ ~ RECEIPT Uate 1~~ ~ 2164 Received Frvm ec r1u 1 Add ress ~ f ~ ol~ Qavllars ~ 20- 0 01 Fr, ~ ACCp HpW PAIQ AMT t3F ACCD[lh4T CASH ARAf. MAii1 OfEC1F , U~ ~`E I I I Q~~R , r, 6 INLAND PACIFIC ENGrnrEERtNG.C0;,.INC. ' • ~ 10$ 4 g' 707 W TTF! AVE. S[11TE- 200 WA5}1EHGT{!A! TR1J$T.8&AIK SPOKAtVE: WA 99204. _ SapKaOIL wa 9Wr42121 . (509)'458=584D . . - • - • - • ~ - - ` - 17AT'E COAfTAQL Nf] Rlu0i1H7 ' • , ~~~y~t~?~ ~~~8~~ ti~=~._~ti ~ar. .a~*~x-~`H:IRTY- ~li~D N[~-/, ~.~~~7-.I~QL~,ARS*~--~ _ M.Tme- - • ' - - - - - - _ - . . . ~ . . _ ' , - QRQFFFOF- SPMz ANE COUNTW LNGTNELRS ' - ~ - - - - - dN1..ANa.PACCFlC ENciNEERE3aG CO , INC - , • , - _ . • i - _ . - - _ ~ ~ , ~ - ' ' _ ~~ERAL.Aecautir ~ • - - - - - -'r' - . ~ _ . ; _ ~ ' . ~ ' ' ; - , - • s. - - ' ' . _ _ . - , - • ~ - - ' ~ ~ . ' • _ - r : ' = , t~~~'~.~$.48,.~~'' ~:2'~: k~00~ri:9~~ ~(1q-~"~ 6•~ ~;~.3u.F =AuT+oR~ . " R ~ . 1 I ~ r~ Jf ~ - - rNLANa PACiFie ENGINEERING, INC. November 29, 1995 5oftwx4 W.O. Na. 93143 ~ ~r,~~a~•- ~ Spokane County Public Wurks ' R.ECEIVED ~ W. 1026 Braadwa}+ ~ ~ , Spakane, WA 99264 r ; SPOKARE COUFITY ENGfNEER ~ Attn: Bob Bruggeman, F.E. iZe: Shelley Take P'hase I - P'F,1750-94 Rvad Closure -Traffic Contral Plan far tbe Sewer Extensivrr - st Canaery Itvad and 4th Avenue. Bcib: Enclasetl is a prapvsed Road Clvsure -Traffic Gvntrvl plan for the tempnrary clasure of 4th Avenue at Garrnery Rvad. This cYasure is being requested in arder trr extenci the sewer being instailed vn Cannery Road into the Shelley L.alee Plat, Phase Z. At this time this clvsure is anfacipated tp be far approximately 3 to 4 days. Within thas time frame the scope af wark is expecteci to include cutting 4th Avenue, extending the sewer into the plat, bac~'iHing and campacting the pipe within t,he roadway, cancrette patching with 6-inches af PCC, broom ~inishing the surface and allowing fvr a cure period. Please re►riew this plan. If this plan meets with yvur appraval, please nvtify this vf~rce and Ed Parr}+ at Spokane County as he is cavrdinating revisians tv the constructivn perrnrit. Shvuld you have any comments vr rec}uire alay revisivns please contact rne directly. Shrruld during your review you have any further questivns zegarding this submittal or any additivnal features vn these plans please dv not hesitate tv call. Sincerely, TnIand acific En ineering Go. Tadd R. Whipple, P.E. TRWltw enclasures cc: Ed Parry, Spokane Cvunty file 7071+Vest 7th . 5uae 204 2420 Lakewood Drive • 5uite 205 Spakane, 4vA 99204 Coeur d'Aiene. ID 83814 509-458-6840 ■FA?t 501-458-6844 208-765-7784 • FAX- 208-764-7277 5 I t i I , • . , ^ . z ~ ~ ~ ' ~ y w ~ - a~~a~ . , , yv Y , . ~ L TRAFFIC CDNTROL PLAN FOR S HELLEY LA~E SEWER INS'I`ALLATIaN ~j 2 E4. WSDOT TYPE III BARRICAQES W/ " RDAD CLOSED R1 1-2 i \ ROAD sth AvE 4v, AvE, I~ ~ cL4sEO @ curam AT CLOSM AT AFi EAD cMNM Ro. CAwNMr Ro. • , , W20-3 W20-3 (MOD) w20-3 (MOa) ii _-v___--_________________-t_____----__s---~ _ s~cus nv~. _ __a- _ - - - - - - - - - - - - - - - - - - - - ------i~ ~r 4 2 ~ ~ I I t ~ I I 4 I ' I I -,_----_-,___-----z-___-_----y--_________-_______ -------------__J L_ 5P~7lG4AfE [,~1N}1' 1~C'sk7 ~ ~41AY f__--___- __4_.,d------ - - - - I I ~ - - Izi I ~ I~ ~ P I E ~ ~ ~ I 3 I ~ Q I I M I 4 ~ I j ~ 2 . ~,~a L---------------- ~-------T------ ~ -_----T----__j , r_____--- ___--_----__~zr~ ~~~G _-_-__-_-__M-_- + 7m waA ► Na 2 r - - i _ • . f S P C7 1°c- A Np- DEP,axTMErvr OF 8UiLnINc AND PtiAlvlviNG • A D[vlsie7N OE rHE r'[js[IC WaRY-s DF-PAR1'MF1vi' JAAYES L. MANSCJN. C B Q. DIREC'IbR QEIVIV[S M SCC]T"f. r' E. DIRECTC]T{ MEMORANDUM TQ: L7iuision of Engineering and Roads Di►aision crf Utilities ° Divisian of BuiPdings Spokane Counry Health District RIECE1VED Spokane Cvunty Parks, Recreation and Fair ~ E~ 0 5 1996 Fire Frotectian L7istrict Nv. 1 Vera Water and k'ower CeTitral Va11ey Schmoi Distt7ct FROM; Lvuis Webster, Planner II DATE: February 2, 1996 SUBJECT: Propvsed Final Plat of PE-175{]-94 SHELLE1' LAKE Enclvsed find copies of the aboVe referenced final plat. I'lease review and forward any cvnmnnents by February 15, 1996. rf you have any questivns yau may contact Lvuis VVebster at 456-2205. Thank you. 5am EilCli7511I'e c: inland Pacific Engineerang, 707 West 7th, Suite 200, Spokarae, WA 99204 ~s ~ , 102$ WEST BRCDftDWAY AVENUE • 5pC][CANE.'WASHiNGTf3N/992fi0 BL1IL17ING PE-1f3NE (509) 456-3575 • FAJC (501) 456-4703 PLAfaNING T'HCJNE (504} 456-2205 • FA%. (509) 456-2243 TDD (509) 324-3166 1 ' - ~ ' - s F ~ ~ . 4 m. ~ ~ t^ 4 j~ y ('c I I RPR-19°1595 08:01 INLRND PACIFIC ENG P•01 ` r~ INLAND PACIFIc ENGINEERING, INC. April 19, 1936 pat Fax Nr~t 7pl P"~` ~ W.O. No. 93143 ~ ~ Sgakane County ~blic Warks cco k~ W. 1026 Broadway P~ # l ~ Spvkane, WA 99260 Fax • ~ MFax 0 - , Attn. Bill H'emmings. P . Re: 5he11ey La1ce - rE-175d-~4 Plan Re~iew Dear Bi1l; Mark Kamrath nf our office cailed Ed Parry of yvur office yesrerday ta inquire as to the scatus of the Shelley Lake plan review. These pla,ns were submined ta the County on Febrruary 13, 1996. T'er his canversation With Mr. Parry, Ed indicated that sca far he bas nvY had adequate timg to review aur submittal and indicaced tkat if he cauld nvt get to the revievu ►vithin the neut two weeks that he might have svmevne e1se help h.im review the plans. As yau knvw, the 51nclley Take submiml, i5 a rarber large PUI3 plat of QVer $0-lats propased wi[h mainly private roads. However, there are significannt prublic road revisions wtueh will require County apgraval. A2 ihis pnaat, we recognize thac Ed is a vecy cvmpetent reviewer and an irrlportanL meTnher a#' your staft and would appreciate hirra reviewiMg this projecr. However, we carnnot sEand rhe [ime delays. Therefore, I would respectfully requcsr tha[ you either shift enough work off of Ed's desk [v anoiher staff member wtuch would allaw Ed to review this project or reassign Shelley Lake to another reviewer, this neecls to be ar-complished within the week. 5hould yvu have any questiors vr commenEs regarding this request please dn no[ hesitate to ' ca21 ai 458-6540. ~ ts Sinmely. 1 Facific gineerinpi Co., in' . Aft44:;U Wr 1.- CA-r►r.- I'vdd R. Whtipple, P.E. ~ ~ 0~ 4+~ ~`I+~► +G~ee t~ ~ TRWtiw enclvsures cc: Bill Iahns, County Engineer file 707'West 7th • 5ufte 200 2420 Lakervcmd [?rive • 5uste 205 5po'Fane. WA 99204 Coeuc d'Alene. fE] 8$814 S09436-66+1O r FA?(: 509-458-8&i4 208•765•7764 ■ FAc: 248-769-7277 1' ~1 ~ f d ~ I S P ~ A 1!T E ~ ~ iJ N T Y --b T]IVISTf?N OF ENCIIVEERkNC AND R4Ai3S r ADIVISICIN OF THE PLIBLIC WC7FtK5 DEPAR'FMENF Wi11Eam A. Johns, P.E., County Enguseer "f]ennis M 5cott, P E, L]ieector MEMVfVANDU1Y1 Date March 11, 1996 Ta: Ed Parry, P. E. FrQm, Water Resources~f j~ Subject. Sedirner~t contral plan fvr 5helly Lake 'llVe have several reservativns canr.ernmg the proposed use of stravv bale barriers as the sole me#had of sediment cvntrol for Shelly Lake. There are several #echnical references and artiGles that address where and when straw bales shauld be utilized. Fvr example, the Department of Ecvlvgy which has spent considerable amvunt of time researching their BMPs has reparted vn the conditions under which this practice applies in "The Technical Manual" of the Stvrmwater Managemerrt Manual for #he Puget Svund Basin. They report that #he canditivns straw bales should be used are: 9} Belaw disturbed areas suhject ta shee4 and rill ervsion. 2} Where the size of the drainage area is nv grea#er than 114 acre per 100 feet of barrier Rength; the maximu m skope length b+ehind the barri er Ms 100 feet; and the maximum siope gradient behind the barrier is 50°Ia 3) In minor swales or ditch lines where #he macimum contributing drarnage area is no greater than 2 acres 4) Where effectiveness is required #or Fess than 3 mvnths 5) Under nv circumstances shouid straw bale barriers he cvnstructed in live streams or in swaEes where there is the possibility of a washvut. The straw bale detail shawn vn the 5helly Lake plan indicates the straw baie ►raill be placed with the ►radre surFace facing up, vvhile the O.E. detail shows the wire surFace perpendicular tv #he flow. Placing th+e wire side perpendicular tv the frvw has a two fvld purpvse, 1, allows the water tv drain out of the bale vertically which slows the deterioration prvcess of the hay Ra,pid deterivration hnwever is , one of the maPn drawbacks of fhis BMP, hence the 3 month maxim+am durativra in the abave canditsons 2 the runaff cara nvt tunnel through the bale as easily and forces a filtering activn to occur. According tQ the above conditians it dves rt❑t appear that this BMP is well suited for the site and duratian that is beEng propased. Recent articles have rated the performance straw bales as Iow due #o poor installation and 1026 YN Broadway ,4ve. • 5pakane, WA 99260-0170 •(509) 456-360U FAX (509) 329-3478 TI3D (509) 324-3166 ~ ~ 'l ~ mairrtenance. Please refer to the attached article for further information Vlle strongly suggest the sole use of straw bales be recvnsidered Hoavever, If they are used, at a minimum they should be implemented under current mdustry accepted conditianslduration There are several alternative BMPs that can be considered for this site. For example; 1) Llsing a bulldozer to track the sl❑pss tv add roughness, we highly recommend hydroseeding over the tracks due tv the fact that it is far more cost effective ta prevent erasion than to cvntr❑I sediment, 2) P'lace twa doversion ditches, one along the top vf the slvpe. Another diversion ditch ira the same loca#ian as the straw bales. 6oth ditches would fhen flow mto sedimentation ,pand(s) tha# will release the runaff back to its natural path aftsr treatment. The ditches wvuld be sized to handle the twv year starm and the pond(s) would be sized with a settling volume of at deast 2 feet. Again, this is only one example of alternatives that appear to meet the canditivns o# #he site and the abJectives of an erosivn prevention and sedEmerat control plan If yflu would like to discuss further op#ions or if we can supply yau with any infarmativn, please fet us knvw. Encl. ~ . ~ . ~ • ~ a~ S QU N T Y DIVISIoN C]F ]ENGINEERINC ANL3 RC]AI75 • A I31V1SIC]N OF THE Pi1BI,IC WQRICS L?EPARTMENT William A. Jo3uss, P.E, Couniy Engineer i]ennis M. ScoEt, F' E. Dsrector May s, 1996 Toda wn ippie, P. E. IFEG Buster Heitman I andmark Builders 8205 Nvrth Division Spvkane, VVA 99208 PUBJECT: P1750 - Shelley Lake P.U.D. 2nd Review Gentlemen: 'I]ue tv the number and extent of recurring items, a cursvey revievv of the road, drainage, grading, and erosion cvntxvl plars, and the drainage calculations fnr this project has been accomplished. Area,s vf cancern tv us are indirated an the attached list. Please rnake the necessary carrectians and resubmit them to t'his office in order that the review process may prveee.d. When the lr~ ans are resubmitted, 12lease znark aIl changes ao the rev& '!z010t. Flease ersure that a1l the plans and calculatians are submitted as vne compIete submittal. If yvu haVe any questions abvut this review, piease contact Ed Parry at 456-3600. Thank yau. Very truly yvurs, Wilfliarn A. Jvhns, P. E. Spvkane +County Engineer ~ ~tr. Edw~ur T. ry, ,P.E. F1ans Review Engineer encls: P[ans (i se[: rvadsldrainage; 1 set: gradinglsrasion control) ~ Ilrainage Calculations Camments (5 pages) nG: pdoject fiee reNiewcr (cnrnnients oNY) 1026 W. Bmadway Ave. • Spakane, WA 49260-0170 •(504) 456-3600 Ft17f (509) 324-3478 T3JLl: (509) 324-3166 i ~ ~I i ~ ONEMENTS SPClKANE CflUIVTY DIVISIDN OF ENGINEERING & RvATlS 1026 W BRaADWAY, SPflKAriiE WA 99260-0710 FHONE (509)456-3600 FAX (509)324-3478 REVIEW 2 REVTEWER: Ed Farrv PROJECT PL750 DATE: 9 Mav 96 PROJEC`fi NAME: Shellev Lalce P. U. D. Due to she extent of recurfing iterru, these comme,nts are generad a,n nature, and reflect a cursory rrevievu of this subrnittal. P'dease ensure that the plan.r and calculertions conform to the rpplrcablc standurds, and gaod engrneering praetice 2nd Review: GENERAL 1. Plans will need to be signed by the Ueveiaper priar to approval hy the County 2. Plans fQr the entire length of Rotchfvrd T]rive (per canditions of the design deviativn - see Cvunty Engineer's letter dated 22 Jan 96) were nvt received with this subrnittal 3. Engineer's Cvndition #40 requires that the 4th Avenue intersectian at Canklin be designed as a 4-way intersection. Hvw dves this rvad alignment fu1fill this conditivn? Please call to discuss. 4. CL elevations at rpad intersections need to be covrdinated between the various plan sheets 5. Street narnes in the sta[ivn equations need to be coordinated w+ith the street names shown on the p1ans. 6. Street names neei to be covrdinated vvith the names shawn on the plat 7. The plans will need the approval af the Fire District prior to apprnval by the County 8. Bermlbanc elevatians at pands needs to set to at least 6.2' abvve the lawest TfC at the pQnd. 9. Finished grade cvntours need to be shawn fvr all drainage swales ROAD & DRAINAGE PLANS Sheet 2 i. Frvvide "R" Value cests for all svil grvup t,ypes to verify pavement sections. f]ther methvds of pavement sectivn design may be aceeptable to the Cvunty Engineer, upvn subm~ttal erf a❑esign Beviatiran Request ~ _ i I 0 \ REVIEW CONIlVIENTS Page 2 of 5 8 May 96 PROJECT # P1750 REVIEW # 2 2. The width indicated for Conklin Rd. (40') does not meet the 44' width required in Engineer's Condition #25. The section for Conklin Road should also indicate the 2-way left turn lane noted in that condition. 3. Where a pedestrian pathway is provided as part of the roadway width, the section typically has an offset crown so that vehicles do not straddle the crown 4. Road sections need to indicate existing R/W, proposed R/W, future acquisition area, and existing paving, as appropriate Sheet 3 1. Provide warning signs for the reduced speeds as per the design deviation conditions. 2. Contact the County Traffic Engineer to determine taper requirements to transition from 40' width south of 4th Avenue to 44' width north of 4th Avenue Provide the superelevation information for the curves along Rotchford Drive. Sheet 4: 1. The vertical curve at PVI 43+00 does not provide adequate sight distance for the grades, terrain, and road classification 2. The design needs to provide 208 treatment for the new paving, as a minimum. The drywell in the curbline at Conklin 40+49 RT does not accomplish this. Sheet 5: l. The design needs to provide 208 treatment for the new paving, as a minimum. The drywell in the curbline at 4th Avenue 6+75 RT does not accomplish this. 2. Curb grade sheets for 4th. Ave. widening were not received with this submittal. 3. The pavement transition on 4th Avenue needs to provide a taper length of at least 10:1 (100' minimum) ~ 4. Curb grades on 4th Ave. are below the county minimum of 0.5 the County Engineer's approval of a Design Deviation Request is needed prior to plan approval. i , , , ~ ~ ` . REVTEW CQMMTNTS Page 3 of 5 S Nfiay 96 PR4JECT # P175 R.EaIIEW # 2 5. The hmrizvntal curve CL (258') daes nat meet the 81 SCRS rninimum radius for aCallectvr Arterial on flat terrain (715' ) . Sheet f: No Camments at Chis tiane Sheet 7: 1. The "knuckle" int,ersectivns will need the County Engineer's apprvWal of a Design Deviativn Request. Written approval from the Fire I3istrict should be include1 as part of the justificativn. 2. CT. bearing 8c distance need to be shown far the leg of the "T" turnaround at the nvrtherly terminus of Hvmestead Lane Sheet 8: NCl CflI11f11ef1t5 a~ th15 tlll'1e ,,~hf'.Et 9: N0 CO111IT1elIts aC th1S t1[112 Sheet 10: Nv Comments at this time Sheet 11: 1. Retaining vaall: a. Need tv include the necessar'y svils infvrmativr+, calcs, etc., to snaw that the wall is design ed praperly. For example: (1) ZCBC) reporti #4539 (eontained in the Keystone manufacturer's book) indicafies that a soils repart must be submitteci. The soils repart needs to conform to Section 2905 of the 91 UBC (which is now Sectivn 1804 of the 94 UBC). The "geatechnical review" prvvided in yvur 21 mareh 96 letter does nvt appear to address the required i¢ems. Tn additivn, there are elements of the geatechnical review (relvcation of the heel drain ta the subgrade elevativn of the crushed rvck bearing course, 2' width of backdrain up the height of the w,all, geogrid reinforcement, etc.,) which are not indicated vn the wa11 detail. The P. E. starnp vn the gevtechnicat review does not bear the date of signature. (2) The Keystone Buyline infarrnativn (contained in the Keystone tnanufacturer's baok) indieates that geogrid is needead for walls with s1vping backfills b. Need to indicate where the foundativn drains wi11 daylight, and pravide spme sort of vermin prvtectian c. The retalning tivall location needs to be coord'inated with the grading plan. Finished grade contcrurs in the Vieinity of the wall need to be strorvn as part of either the rvad plans vr the wall detail; grad ing easements may be needed d. Need to indicate startlend stations far the wa11 canstructian e. Landscaping needs ra drain to tlle street (2 min.) ~ ~ i' REV1EW COMMENTS Page 4 vf 5 8 May 96 PROJECT # F 1750 REVTEVV #1 2 f. A cut-aff swale is typically provided at tIne tvp of the wall 2. The flvor eteVativn at Pvnd H(2420.$7) needs to be crrordinated with the grading plan (2052), and with the curb eievativns fvr Rotchford 1DxiVe. Finished grade contvurs need to be shvwn 3. Is the neck in Pond G wide envugh to canstruct and malntain prcaperly? Sheet 12: 1. The private road entry onto the Rotchford Drive temparary cul-de-sac needs to be constructed as a driveway entry, to delineate the public roads from the pcivate rvads 2. T"he temporat'y easement shnuld he configured as separate easements fvr the publ ic 3. A concrete ot ACP pad (t}+picaliy 6' x 6') shauld be provided at khe inlet to Che pipe at the temporary drainage pond. Cvnsid'erativn should be given to alsv proaiding a sump to tra,p out sediment prior to tlischarge into the pvnd GP[ADING ANl ERCISM_ COBTRf]L F'LANS 1. As was mentioned in rhe preuious cnmments fos t.hese plar+s (November 1995), the straw bales are not Iicely to be effective as propased, due to excessive uphill areas, long surEace lengths, and steep slopes. Same additivnal infvrmation ahout the use of straw bale-s in included fve your infQrrnativn 2. Haw will the tvpsosl stockpiles be stab idizedlprvtected frain erosivn°? 3. Are there any limits an the amaunt af disturbed area, and how long the disturbed areas can remain open hefore same sort of stabilizing means is tnandatory? 4. Yvur transmittal Ietter (29 Feb 1996) indicates that no calcul'ations were provided for the sumpIsediment trap at the IVVV carner of the site. The grading p1an indicates that an existing is being utilized for this purpose, with some grading to expand the naturaI sump area. Calculations are still needed to shvw that the propased sump is proper1y sized. -CAL.GUATTOM 1. The basin limits shvwn vn rhe basin map neel to be cvvrdinated with the grading pkan, as well as with the lacation of the Vardaus catch basins ~ L 1 ~ d t 1 ~ kEVIEW COMMENTS Page 5 vf 5 8 May 9G PROJECT # PI750 REVLEW # 2 2. Offsite topvgraphy r►eeds to extend far enaugh to define the basin limits 3. {Jffsit.e basins neei tv be accvunted for in the design. How are the flaws from the offsite basin south of baszn A managed? 4. Pre-deVeloped and post deveYvpment flvws fvr the basins discharging vff the site need to be analyzed to determine what, iff any, mitigating measures may he needed to manage flvws 5. Provide calculations for the pipe to temp prand A. Fipe frvm CBI tv CB 2 d'oes nvt appear to be adequately sized for the tlows int+a the pipe; 1'Yease check & resolve. Ple-ase recheck vther pipes tv ensure that they are adequately sized - a pipe network analysis is typicall'y done when a pipe system is intended. 7.Verify the vvidth of ponding in the street at the lvcatians where a surnp emndition exists, 20 LC}`l" F'LANS 1. Lot Flans were nvt receiued wi#.h this suhmiCtal. EASE1ViEM 1. Sight distance easements wiiII be needed I STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN II-5.8.2 BHP E3.15 Straw Bale Barrier Code: O Symbol: C=_-CZZZ= Definition A temporary sediment barrier consisting of a row of entrenched and anchored etraw bales. Purpose l. To intercept and detain emall amounta of sediment from diaturbed areas of limited extent to prevent sediment from leaving the site. 2. To decreaee the velocity of sheet flows and low-to-moderate level channel flows. Conditions Where Practice Aioolies • Below diaturbed areae aubject to sheet and rill erosion. . Where the size of the drainage area is no greater than 1J4 acre per 100 feet of barrier length; the maximum slope length behind the barrier is 100 feet; and the maximum alope gradient behind the barrier is 50 percent (2:1). . In minor swalea or ditch lines where the maximum contributing drainage area is no qreater than 2 acres. . Where effectiveneas is required for less than 3 months. ' • Under no circumatances ehould straw bale barriers be conatructed in live streama or in awales where there is the poseibility of a waehout. Advantaaes ' . When prcperly used, atraw bale barriera are an inexpensive method of aediment control. DisadvantaaealProbleme • Straw bale barriers are easy to misuae and can become contributora to a eediment problem inetead of a solution. . It is difficult tc tell if bales are securely seated and snug against each other. Plannina Considerations Based on observations made Zocally and in Virginia, Pennsylvania, 1Ysryland, and other parts of the nation, straw bale barriers have not been as effective as many asers had hoped they would be. There are three major reasons for such ineffectiveness. i. Improper use of straw baZe harriers has been a major problem. Straw baZe barriers have been used in streams and drainageways where high water velocities and volumes have destroyed or impaired their effectiveness. 2. Improper pZacement and instalZation of Lhe barriers, such as stakinq the bales directly to the ground s+ith no soil seal or entrenchment, has a1.Iowed undercutting and end fZow. This has resulted in additions to, rather than removal of, sediment from runoff waters. I1-5-79 FEBRUARY, 1992 ~ . ► i I ~ . sTOwKWATER M,rrAcKMENr rANUAL FOR THE pUGET SvUND sr,szN nRAFr 3. Znadequste mar.ntenance Iowers the effectivenesa af these barrs.Qrs. For estample, Lrapping @ffYCi@nG'1.@s af careful2y instalIed straw bale barriers an ane project in Virgiriia dropped from 57 percent to 16 percent i-n vne mvnth due to 3ack af mairitenance. There are se.riavs guestians aFivut the continued erse caf straw bale barr,iers as they are presently snstalled and inaintaa.rsed. Averagi.ng apprvximately $4.00 per 1z.near foat, the thouasnds af straw bale barriers trsed annu831y represent suffictent expense that apt*mum installation prvicedures shov3d be emphasized. If such prncedures are cerefully follatis►ed, straw bale baxz•zers can be quite ef#'ective. Therefore, aent-ir2ued des,ignation of straw bale laarriers as a 8MP i,+il1 ,be ccuats,ngent vpon signsficant improvement in the installaticn and maintenance proceduras apg2ied to ther.s use. Desian Criteria • A formal design is avt required. ■ SYseet Flow Annlicatians l. Bales Bhall be placed in a single row. Iengthwise ❑n the carstaur, with ertd$ vf ad}acent bales tiatatlv abutting arae anothes. 2. A11 bale$ sha1l be either wire-bound ar string-tied_ 5traw baies shall be installed so that bindings are vriented around the sidQS rather tttan aiong the trrps and bottams af the bales in vrder Ca prenent deterior-atien of the bindinge (Figure 11r5.19). 3. The baxrier ahali be entrenched and backfilled. A trersch shall be excavated the width of a bale and the lenc;th of the proposed barrier to a minimum depth Af 4 inches. The trench must be deep enough to reutcave ail grass and other material which might allvw underflQw. After the bales a.re staked and chiaked (filled by wedging), the exca,vated soil sha11 he backfiZledl against the barzier. Sackfil3 sail shall confcrm te the gsvund level on the downhili eide and shall be built ug ta 4 inches againat the uphill side vf the barrier {Figure I1-5,13). 4. Each bale shaZl be securely anchored by at least 2stake$ ar re-bars driven thrrough the ba1e. The first stake iaa eaeh bale shall be driven toward trie previously laid bale to £+arce the bales together. Stakes vr re-bars shall be driven deep er►ough irata the grrund to securely anchar the baies. Stakes should aqt extend abave the ba1eB but instead should be drinen i,rt fPuah with the top vf the bale for safety reaaons. 5. The qaps between the bales shall be chinked (filled by wedging) with straw to prrevent water fr4m escaping between the ba.lea. Lovse straw scattered ov$r the area imnediately uphill frvm a atraw bale barrier tends tv increase barrier efficiency. Wedging must he done carefully in arder not tc segazate the bales. 5. TnspectiQn shall kre frequent and repair vr replacernent sha11 be made prvmgtly as needsd. 7. straw bale barriers shall be remaved when they have servec} their usefulnesQ, but nat befvxe the upsloge areas have beer► permanently stabilized. ■ Channel Flow ADnlicatians l. Sales sha11 be placed in a sirsgle row, lengthw.ise, oriented pernendicular to the contour, with enda of adjaeent bales tightly abutting vne anot,her. 32-5-50 FEBFtUAR1C, 1092 ~ ( ! , ms STORZfWPITEFt MAPTFiGEMENT MANUAL FOR THE P17GET SUUN'@ B#.aIN Ftgure 11-5.19 Crvss-5ectian of a Praper3y Inatalled 5traw Sale Sarrier 5taked and Estrenched SLrsx Baie &inding Wire or 7wine y~Cvmpacted Sail Lo p Prerent Piping ~ f ~ 4 4 5ediment Laelen Filtered Runoff ~ S Runnff i -i 1 2, The remaining steps fcar installing a straw bale barrier far sheet flow applicationa apply here, with the fallQwing addition. 3. The barrier ahall ba extQnded ta such a length that the bottomg of the end ' bales are higher in elevation than the tap of the lawest middle bale (Figare II-5.20) ta aseure that sediment-laderr runvff will flow eitkner thraugh ar over the barrier but not around it. Maintenance • 5traw bale baxriers shal1 be inspected zmmediately after each rurscsff-prvducing rainfail assd at leaat daily during prolonged rai,nfall. • Clvse attentian shall be gsaid to the repair of damaged bales, end runs, and undercutting beneath bales. • ivecesoary regairs to barriera ar repia,cement of bales ahall be accomplashed pramptly. • 5ediment depoQitB should be remvver3 after eac3a runoff-prvducing raiafall. They must be removed when the level of deposition reachea appraxianately vne-tralf the height of the barrier. + Aray eedfinent deposits remai ning in place after the straw bale barrier is nv Lvnger requirec3 shall be dressed to confvrm to the exiaging grade, pregared arad seeded. Al1 temporary and permanent erasxon and sedi.saerat contrvl practices ehall be maintaiaed and repaired as needed to assure caatinued perfarstance of their intended functivn. A],l mainteaance and regair sha11 be cvnducted in accardance with an approved manuai. • A1l tsmpvrary eresion and sediment control measures shall be reznoved within 3[] days after final site stabilizativn is achieved or after the tempvra.ry BMPs aze rtv langer needed. Trapped sediment shall be remaved ar atabLliaed an site. Disturbed seil areas resulting from removal shall be perrnanently 9tabilized. II-5-$1 FEHRUARY, 1992 F ~ e ~ ~ ~ w' , • STORMWATER MANAGENENT MANLTAL FOR THE P[FCET SBUHD BASIH Figure I1-5.20 Praper Instal lativrs af a 5traw Bale 8arrier =xcavate the trench. 2. Place and stake str-aw bales. ~ ~ f. ~ • ~ F1 ow w9 dt~e 4 ~ ~ . v • i~`~=~`,`~-~,. ~ ! E [~~"'~'rJr~.w~Y ~ • zz' i.~ Is~. ~ ~ ~ ~ • ' ' ' ! ~ ~ ~ ; _ ~a _ • . I ~ r ~ • ~ OiC~~ . 3. Wedge Zoose 5traw between 4. Backtill and campact the 6ales. -excavated soi1. CONSTRUCT ION OF A'STRAW SRLE BARR IER ~ A - ~ B ' • , ~ ~ 1- Q Paints R shauld be higher than point 3 PROPER PLACEMEiYT f]F 5TRA1J BALE BARRIER IN DRAIlVAGE WAY 11-5-82 FEbRtI19RY. 1992 , . . s ~ ~I I, .w • Fie1d survey af cvn.strucdiort prctctices shrjwg fleedlill be~rror mai►rrenance Construction Practlces: The Goad, #he 13ad, and the Ugly ~ t ' By: Raberk G. Paterson, A,ssistsant Yrngessor, Uni►+erslky of Texas ; ~ 0 verthe last two decades, ttumerous ficld aitd Krod, aaerage, fair, and ponr) based nn their typical ~ iaboratory saudies haVe tesced thn besl Pieldexpericnces.Second,theadministratarswere aiso ~ techniyues for greventing erasion and tralt- 44kecl to comment on Cheir percepLt4n of the main r ping suspended sediment at constructivn sites. 'Rtc 11Eiuse(s) e+f failures foa each cansttttcLian practice. U.S. EPA has zncorimrated enany of thsse findings inta I'r'ssihPsxeasons for faiiures iocPuded that tlae praccice its guidance documents fvr tha NPQES stornrwatcr whs instalfed pvorly, did not wark, or was pnorly and nonpoint source control programs.1-' However, M;ii~~ned, : dety few of the studies haVe assessed hnw welf these ' pians ~ actuaIly impiernented at crsnstt'ucCion sites. ~ i~ld in►+est~gatic~n paa~+ided ar~ ~ndepe~dent =innessment of E5C impIementativn for mnre ttoan Anecdotal evidence suggesLs that poas instal lafion 1.4M cqnstcvcuon gractices evaluated in a Cflia1 of 129 and maintenance af consrruction prac6ces is endemic E!~%C pIans within nineNortEa CaroIina in manp state and ]ocal erasiQn and sediment contrvi .liirisdictions. The nine jurisdictions ~C) p~~~.i.z1.< Deta3ied inFormaEion, howcver. wcre se2eGted to adequately represent 7he w~rst per~orme~5, by a ~ large margin, were bnssh isIacking anthasgecificprabTetnsencvunteredduring , srnstrrucuon sites in each oF IVorth impler~entation?~' Systematic analysis of ESC pra- ~'-,rolina'stl~reephysiographicrcgians ~~mers_and str~w baies. .~r,~~mmarr,mms~~'~s~rF~r,•~ gram implemenLativn is raeeded to adwanee thgse prac- (rnvuntain, pied3mflnt and coastal ; dces. Designers need to know wfuch CflRStTUCtIi?n Main) and acrnss thcee different leveYs vf pragram practices are most problematic and know ho►v tu iim't arlministration (i.e., rnunicipaI, county and state ad= perfotmance failures through beiterdesign and inspec- assinistered programs). tion' Project sites were randomly selected froin a list of Sedimeni contavl inspeetQrs can a1sQ benefit frntn aelave construction pmjeccs within cach jurisdiction ' thiskindofinFnrmatinn.Forexample,marzyinspectOrs ; ur,ing a random assignment psaceduae. T'he seiectign leam jab slsills [hmugh an apprenticesinp prmess f, Jrrrcedure prowided afairly e►+en mix of devclopment which unfvrtvna[ely relegates much le3rning to tnai types: St percen[ of the canstrtiction projects were , and errar despite the best efforts rrEsenivr E5C profes- I cxidenua1 and 44 percene were non-resideatial. 'Phe sionals [o help them "learn the ropes " In other cases, tiiiiality of E5C implementa[iQn was evaluated in tenns prablems are encountered an such a piecerneal basis ~ zil (a) whether the gractices had been adequately in- , that trends cannoc be easily discerned. Malted and (b) if chey wedc adequately maintained. nis arficIs sheds light on irnplementation presb- gtud~esvlts ]ems that persist amvng many commonly ,~rescnbed i Y' ccsnsfiacuonpracvicesbaxedonaeomprehensideevalu- ~ Expert Opfnian an BMF Perfonnance atian of ATorth Camlina's F-SC Prvgrar► undertaken in R Few N+srth Garolina E5C administrators were sat- 1990. Prohlems with canstruc[ian pracisces were iden- ~ ti~ed through bvtli expert opinion surv~ys ~.nd an w islied with the typical ieid perFarmance af most e~rn- i.rtrucrion pracfices; anly 3 out flf [he 1 l constructian investigaCion of over 1,0W prescnbed canscructinn !practices were considered tn be giwd or excellent practices in tFAe field. Expert npinians were abtained i(Figure 7). Sediment basins, seditnent traps, and riprap tkyraugh amaii suir►+ey of 44 North Carvlina E5C f stabsiized channels received che highest percentage of adminisaratn,rs using ttae TotalSurvey I]esign methud. 1 favpra6ie ratings. The warst perfvrrners, by a Iarge - Responses were rereived fram 77 perceni of the taial ! margin, were b~sh basriers and sn-awbales Only twc~ Populatian. ~ out of 34 actsninisu-ators rated t3+pical field pert'or- Expert opinion was soughc on two key implemen- s rrrance as "good" and nonerrieweai rypica] hrush barrled - tation issues. FirsC, adttunistratQrs were asked eo rate a pe7formance as satisfactnry. Evaluations a15❑ tended list nf commonly used consuucuvn practices on aI CU be flegatiwe Dn pre-falatiCated 5ilt fenCe aRd Fi[CC subjective five-pviat effectiveness sca9e (excellent. i stnp perfprmanee. [7pinion was more waried on the • °Y ~y~,~; , , ~ . s~ ~ i, , 1 • Jh~,!'- i4'~. ~.':Z.~ .fr7j. a. _ Figure 1: Administrators' performance ratings-percerrt Indtcating' 108001 g4 - q ,,;a~ +basin . 73 72 t ~ ermel' I F " C 60_ . ~~r:•,t ~ j] '`Slope drain - V , . 45 qq .-`N "~Sllt'fBhCe~,`{r;«-. . - a 40 _ 39 35 , . - , . , ~ 2s wlftlie~ ' ~ ~N 'Pre;fab silUence 20j ~ v ` . , , • 8 ~ Straw"bale o ~ Brush'baRier O . r . . . r d • . . h e adequacy of vegetatively stabilized channels, slope of failures for sediment basins, sediment traps, and drains, constructed silt fence, and storm drain inlet storm drain inlet protection measures. . protection (SDIP) measures. Again,themosttechnicallyquestionableconswc- A majority of the experts attributed conswction tion practices were thought to be brush barriecs and practice failure to poor installation (Table 1). Most straw bales. Table 2 summatizes typical comments administrators identified poor installation as the pri- from administrators from the open response option on mary cause of faiiure for filter strips, pre-fabricated silt the survey. fence, constructed silt fence, slope drains, vegetatively stabilized channels, and riprap lined ehannel. In many Field Survey Performance Ratings cases, however, poor maintenance ran a close second The f+eld survey corroborated much-ofthe eapert as the primary cause of likely failure. Most administra- opinion. For example, it appears that few plan review- tors identified poor maintenance as the principal cause ers are allowing the use of questionable practices. For Table 1: Main reason for construction practice failure as identifled by North-Caroliria`~::;- administrators (reported fn perceMage response), N= 22-29 ' . .s ..i ; i •P,iY , ~ . . ~:..~:~:.h s.,i : Technicaliy Poor ' ~lwr. Eroslon and sedfinerrt deficfent installation mairrtenance control measure M i%) , . Brush barrlers • 58 29 • . ' 1'3"`== • , Straw bales , ~ , , ,:'-64 . .20 • . _is :r, t'' - . *Fllter strlp -23 . 41 36`c~ . . Pre-fabricated stlt fence '"•'~23 ~ 54 23 Sllt fence , 7 57 4 36 , . , • :;:,z :;%t. . • Sediment .trap , s . , ' 0 38 • •62 . , - Sedimentfiasin . 11 29 60' • . Inlet protecUon = • • - • 16 40 44 Slope draln, . , . • . , ' 0 76 24 . . . Vegetated c:.ha, nn. , el 27 57 15 Rlprap channel 15 74 11 , 96 Watershed • . - . . . . 1994 i , ~ ~ i ~ • example, anly twa of thc I2$ sedirnent control glans pads aEe widely recognized as an irnportanC part oF evaluated prescribed the use af sttaw bale Qr brush erosion co ntroi pIans, alrnost half eaf the plans failed tu barri ers. Like wise,Pre-fabeicate dsiitFence,filterstnps, require them (and vf those installed, . and siope drains were used spanngiy. almost a third neederl maintenance). F°erhaps the mtsse iateresting f nding was che num- Second, the ield survey revealed that More than 40 percent of fzernfeonstruciian practsces that were never installed silt fence has generally replaced canstructed silt fertce applica- e►+en thaugh they were shown on the plan. Mare than earthen dikes as thediWersion measvre tions were poorly in5#alled and a quarter of the two rnost commnnly psescnbed con- of chaiee at rnesst canswctinrt sites. two-ttlirds required maintenanCe structrgn practices (storm drain infet proteetian and 'The widespreati uss of sil[ fence per- to perfot°m properly. eonstructed silt fence) were never instalieet and nearly haPs shnuld be re-evaIuated in light of half of aEl prescnhed ve[ocity dissipators were not in chear dismal perfQrmance in the field, " place. comparetE to surpristngiy strong gerformance gf dikes. T'he twm most faaQrcd practiees, SDIP and con- stn►cted sile fences, were frequen~ly installed in a poor The gavd, the ~ad, a~d the ug[p manner. Among those 5DIP measvres actuail}+ in- Wha[ Pessons carn be drawn frcam 1hc above analy- staIled, abou[ a thud were root properly constructed sis? Well the goQd naws, at least in North Carolina, is (construcuon lacked eequired znaterials Eike remforc- that plan reviewers and inspectors are reduGing field ' ing wire and adequate coverage oF the base wieh perFotmance problems by minimazing the use of coa- Citraucrn material); 24 gereent wcre nat praperly an- scrucuon practices withachromc tustory Qfpovrimp9s- chored {pnmanly silt fence designs}; and nearly half inentation (i.e., the lorv use af stra►v bales, brush needed additionai maintenance if Ehey werc to perfarm ~~ers. pre-Cabricated siit fenc e, and f-i ltersui ps).'i'he ; properly (Prohlems included tom filter fahnc, damage bad news is that the s(udy has corroborated prior from vehicular impacc and sediment build-tip). Be- anecdotal e►+idence tha[ iraadequate field imp[ementa- eause csf those failures, evalua[ors nated assihle sedi- tion remains a widespread o4stacle to effective sedi- ment entenng into cltaiRage systems in approxamately ment poiluiian c¢rntrol. 'Ihe ►vorst news is Ehat these ane out of eVery five starm drain inlct proteccion results came frqm an anvestigataon of a psograrm that contral measuees evaIuated, many con sider te be one af the stro ngest ESC pro grams More than forty percent of eonstroeted silt fence applicatisans were pooriy installed and twa-thirds re- . quired maEntenance to perform peoperly. 'I7ie mcrst cemmon instaalation problsrns included failure te ase Table 2: Comments nn why constructlan pra[:tices fail , reinf+aecing wire (42 percent), failure [o anchgr filter fabeic (33 perceni), and failvre ta appropnately space Best posts ar irrstall thc fu1I length of required fencing (22 Management percent). The most ccsmmon maintenance problems Practice Commen#s were Failure to repair damaged fencing (whether knocked down by construction aehicles, hydraulie 5traw bafes and Rapid loss of fiiitratlon capacity due to degenora- aveeload, or silt huild-up) and damaged filter Fa6ric brush bamers tlvn and gaps aften left betvveen rneasure and (also pqssibly due to construction actsvities or nacural ground. deterioration). SL3EP and Fadure to inst„aIl afl parts of the measure (e.g., silt fence reinfQrcingwire), faifure tu anchurthe base, faiRure The firtaI calumn m Tahie 3 corroborates mwch of to caver entire deslgnated area w€th fence, and the anecdoeal eYidcnce that poor maintenance remains eonstnrctlan vehlcle5 back over devices. apersistent impediment to effectiNe ssdimen4 pvliu- ~~~~r stdp, Underslaeci fiftee area, sparse vegetation, and tion cnntral. With vnly thuee excepuons, rnore chan ane concentrated runpff aE entry. Qut of eVery foar construction praciices were cQnsid- Vegetative and tnade[{uate channel bed consVuction and at- ered do be functionaliy impaxred because of poormain= Nprop channels tempted vegetatiYe sta6iliPatlan In high velocity tenanGe. C}nce again, the two mos[ cvrnmonly used flow. c onstruc ci on pracuces wcre among the top f ve flffend- SZope drafns Faiiure to anchor drain ta s9ope, failure to make ers. And, wtule mast scdiment basins and traps were inlet water 1ight, failure ta anstall veiecity dlssi- installed carrectly, nearly one-haIf of the traps and pater at outlet, and fai]ure to lea►+e inlet clear of - vne-fvurth o€the bastns were reported tv faul because debris and sediment build up. af poor maintenance. Sedtme~ basiAs Failure ta rem4►re huitt up sediment, faifure ta Fsnally, the field survey examined several con- and traAs stabilize emhankrnents, spillway de;eriqration, siruetio n prac¢ices that were notevaluated in the expert Impraper levefling of embankments, failure to ~ ❑pininn sun+cys, anctuding anti-iraCkzng pads, ftlter anchvr raser pipe, failure tv insta4l trash raG1c, besms and dikes. For example, while anti-vaclung t Watershed • . - . . . o 97 I,,i ~ • . F . _ . Tabf@ 3: AfOrth - "~'~•~~'~a°:~.~; -a',: ' Carvllna1leid survey of #he peefamiance af construc#1onpra~El~s N[!. cQR4~i fuctIQn - , •r,.,~d~,"~„~~„~t~~e Percetrt •P$rce"t , i'.~,~;~'•~~irt'y';' . Eroslon and sedimerrt practices actuafly inst,alled ac[equateFy^ corrtrol measures required in plan Instal[sd •correctly malrttafned Stortn draln inlet-pratection '389 71 * 72 * 55 * ' ' - Sl[t fence 174 67 * 58 * 34 * SsdlmBnt trap 15 r 86 $6 58 * Yeg-Jearth chatiunel 147 77 ~98 • . . , 87f V@locity dis,slPaters 147 51 ~ 86 89 * ` _ Areti-trackfng pad 66 89 89 ; •67 ~ - Sedimerrt baln 43 84 94 75 ~ Fliter herrn 25 52 s 85 -54 * F-artl+ear dIke 25 92 iOD ~ = k" •.as~, ti : , . , •r - y~ '92'-. Rlprap channel 20 50 * go 4Check dam 20 $0 - 94 r - ?e• 63'-* Plpe slvpe drain g89 =Cy+t`~^~.~~, 400 o;~, ~s e•=•~(? FliteT 8t1°l '•'r,m'r'~~.~ 4,," ~'*~~~~~"'.3' p 4 rt* 100 W4,100 ~r 17H.. , l ~•R~"Y'a~ ~~~l~RN ~S~a"a~.i~.~'4: ' . aLFaW •+wlV `C *-r 100 5Q .,~.~~~r o(y : ~i Bfflsh t181►i8r 1 100 ~i~ ~ Prefab BfFt i~et![:B 1QOF rs..~i=.;1U0 „%~~s.4:_r,`y: i','r~,`1^ . 25% or rnore nf practfces rated inadequate far listed rxiterion :^t~=A~.`C~~ M I nadeq uaie nurnber vf cases far anah'sis u r . - a~:_ . r-;~• , in the natian. This suggests that E5C grcrgti^ams may simply one af deaelopers saving a huck. And, whils gerform eNen worsa in states Lhat rely solely vn voIun- svme installauon ,problems aue sureky due to this ma- ' tary complvance. . tive, a isck nf teaining itay also be respvnsi6le. In The study raised many mvre qUestions than it seueral instances, it was clear that the grading contrac- answered. For example, zc proaided little iiqsight re- tvr had incuFred sIl matertal snd labor insrallafion garding underlying causes of the in- Gqsts, bui the canstruciina crew lacked the groper =a0 stallation and maintenance faitur+es aaining to prvperly anehor the fence. Tn other in- 7he widespread use of silt noted. Cerrtainly one cauld take the stances, contraciars cottstructedthe silt fencing to plan fence peChapS 5h[7uld be easy route and blarne a31 impiemenca- specificataons,bucplaced thetn indncations where they re-evaluated in light af tion probIems can deveIopers and their servec9 tittle practica~ purpose. This prohlem c,ften their distllal performance ,grsding cnntcactcsrs srnee they are ar- pceurted when erosian contrvl plan.s contained wague in ihe fe9d. gvabFy responsible for ensuring tha[ field informatian, sueh as notes ihaE mercly specifY ~ cnnstruction practices out] ined in their °`Silt fence to be placed where aeoessary „ sediment contral ptans are installed Lzkewise, w,~~ many ~~~nmce ~~~~~~s are, carmctly HoweVeg, such an antagonistic apprnach theresultofnegIectfinrnanyaffierinstances,prablems ~ undoubtedly aver simplifies what rn many cases is resu]t from design pro6leans such as hydraulic over- Fikely to Ere a complax situatinn. Ioad or ioappropriate fence placemeat (e.g., where Consider, fvr exarngle, the silt fence installation vehiclas are likely to damage the devices aT leaye and maintenance prablems identified by the feid sur- inadequate ra[am fQr magotenamce). "1"he pomt of this vey. 'Fhe eynic might cvnclude thxt the, prohlem is dISCUSSionisnattoshiftbisme,butratieereoemphasizc 98 VVatershed - o . . ■ "i ~ '1 .1 • ' . that installaTissn and maintenanee prahiems often may 5. Malcalm, H R.,A.C• Beard, R.J. 8urby, E.J. Ftai- 6emorecompiex than r,hey anicially agpear. Implemen- ser, M.I. L.uger, and R.G. Paterson, 1990. EvaJu; tation problems may stem nat only fram a]ack ❑F atifln of ihe North Caroiina Erosian and Sedi'- commitment, but also from a iack of kno►vledge an mentControl g'rogsam, Raleigh, A1C: Land Qual- haw to comply (e.g., goor training, poor plans, and ity Seciion, Dovision of Land Resources, North sitc-specific consmaints). Carolina Dcparcment ❑f Envirvnment Hcalth Giaer► the cnticai importance of fieid implementa- and Natural Resaurces. tion of E5C programs and the apparent shortcornings 6. Llnited States, Environmental Protection Agency, that exist, much more attention shauld be foeused on Office of Water. 1993. Guidance Specifying impmving planimplementaraon. "I hetask fQrresearch- Management Measure.s For Svurces of Non- 8SS7f1d LI1Y11'1][il]lefital prOfCSSk[]Ik8l5alEICe 95[[]1deRi1fy point Poilution an Goastal Wa[ers, the grincipal causes of evnstructian practice failures ($40-8-92-002) lanuary. and tesi corrective design, tect►nical asststanca, and 7. LTnited 5tates, Envirvnmental Proteciion Agency, enforcement responses so that a better foundation for ~ffice of Watee. 1942. Storm Water Manage- effeC4ive peogxam imglementation can be undertaken. mant for Construction Actxvities, Deueln,ping Poilutian Preaentian Plans and Best Mxnage- . f.ditor's Note. One Qf our reviewers noted rhat m$ot F'ractices, (EPA 832-R-92-005) 5eptem- orher sTates {e.g., Muryland and I]elaware} 6er. huve descarered the great urEue of rrrrining program.s far conrraCrors Qnd ires,pectors wlaich leezd #o afornrul cenaftcaiion requiremerat. Retsrences 1. Banach, M. 1988. "Implemeniauon of Sedimeat and Erosian Concml Prograns in Conneciicut," in K. Stuart and J. Haraez (eds), Soz[ anti Water ManAgernent; Planrung for Site Deaeltapxttent, Proceeriings of a 5ympasium on Erosion and SedimentControl and StormwaterManagement, 54uthern New Englafld Cha,gter of ctie 5oi1 and Water ConservaIIion Socieip: Starrs, CT. 2. Dawscn,A.Q.1988."RcaleofVolunteerBaa,rdsin Envimnn►ental Regulation: PiTfalls and Prom- isex,,, in K. Stuart and J. Haracx (eds), Soil and Water Managemer►t: Planning for Site De►+eiop- ment, Proceedings of a Symposium on Edvsion and SedimentContrnl and StormwaterManage- meni, 5vuthem New England Lhapter of the Sail and Water Canservation Society' Scorrs, L I'. 3. Dvenges, ].M,, C.P. A11an, R.r.lantos, and C.A. F.iebler. 1990.Carrying Capaci¢yofF=ubIicWacer Supply Watershecls: tL T iterature Aeview of Impacts an Water QuaIity From Residentiai ❑evePvpment, I3artford, CT: CQnnecticvt I7e- partment ofEnvuonmental Ptatection. 4. L.emnnde, A.O. 1988. "Installation arod Mainte- nance of 5tQrmwater IVTanagement Basins,,, in K. Stuaat and J. Haracx (eds), Soil and Water Management. Planning for Site I)e►+elopment, Proceedings of a Sympnsiurn on Emsion and ' 5ediment Cmntrnl and StormwaterManagement, Snuthem New England Chapter of the Snil and Water Canservation 5oczety: 5torrs, C7'. watershed • . . . . 99 i~, , ~ , ~ A ' t ~ INLAND PACIFIC ENGINEERING, INC. June 13, 1996 ; - , W.O. Na. 93143 ' RECEIVED ~ " JUN 1 4 M6 Spakane County Public Works W. 1026 Broadway Spvkane, WA 99264 N SFQKANE C011N11f ENGlFIfER Attn: Fat Harper Re: Shelley Lake Fhase 1- AE-1754-94 Misc. Dear Pat: Enclosed please Find twv exhibits shvwing the affect that widening will have to the Bagues Frvperty. The first exhibit the 11 X 17 will put the future hack of walk within 1.5 feet caf the existing prvperty corner, which anay actually be an improvement based upon the tvpvgraphic sun+ey performed.. T'he secand exhibit shovas the same at the entrance tQ the rnflbile hame park. 1'lease nQte that at bath locatians the cutslfills will be minimal and can be accammodated within the existing rightaof-way. This infarmatian is being proVided to you to assist you in responding to our previous correspondence regarding the canstructed width ofCan➢clin Road. Please call with amy questions. Sincerely, Inl d Pacific ineerin~ Co. ~ ~ Tvdd R. VVtiipple, F.E. TRWftw enclQsures cc: file 747 West 7th . 5utte 200 2020 Lakewoad Qnve • Suite 265 5pokane, WA 59244 C[eur d'I1lene, IL183814 509-458-6840 • FAX 509-458-5844 308-765-7784 • FA7C 208-769-7237 - , I~ . " ' , . . r . . p, ~ _ . ~ , , ~ i~: r - . ; ~ ~ ~ x ~ . I ~ - ~ ~ ~ . } ♦ { ~ ~ ~ ~ ~ . ~ ~ X-3 ~ X XF ~ ~ - - ~ x ~ ~ ~ 1 • yy !S +5 . ~ F ' ~ . I . ~ a '4 . r ` . $ Y r Fe._,+, 4"~'+~~ i,~+~ .i C~~,3 ; 4"ir ery w ~ J ~M+ l..Jip ~B • j ~•r' Y ~ ~X~ a „ ~ . -„M 8~ • $,x~_ ~t ~ ' 1r~~ P ~ + ~ ±i~ir ~ ± ~t1"~,V ~ ~r~~7 S~a t~~`~ ~ ~ ~ ~ . f ~ ~ ~ ~ INLAND PACIFI+C E1~GfNEERINEi COMPANY 747 W 7tFi Avenue, 5uice 200 5pokane, WA 99204 (3{}9)458-+6840 Fax: (509)458-6844 Ta DATE: 57 I.P.E. PR[3JECT ATT'ENTION: PROJECT NAME. 1 DeSCTip$iOI7 El Xerox Prints Cvpy of Letter ~ EJ C)riginal Drawing Cantract Docurnents E] 0 Work Autharizativn 0 Report ~ No. Copies Descriplrorr . 1 ~ EIGA~ Purpase Tnformation El Review & Comments Per Yvur Request Written Appraval ~ Signature & Return Remark5 ~ ~ - . ~ 4 . ~ Signed:'~ cc: ~ R &Wmeff PMS , - w~'r ~l~~ _'xr~"e ~:~~1q"#~'s:"rr~pa'!E"I_ - ~r- r _ r, ~c ~ r~ r ° - _ , , . - - . . , - ` ~ ~ ' ' . f. ' ~ . ~ . e ~y , . . , ~ . . ~ , ~ ~ , E ~ • , . y Y ' . , . l ~ ~ ~ h " _ INLAIYD J'ACIFic CIVVINECRING, INC. March 5, 1196 OOP~~ VV.O. No, 93143 Spakane County F'ub[ic Wvrks W 1026 Broadway Spakane, WA 99260 Attn Ed Parry, f', E he: Stzeiley Lake - PE-1750-94 Transnnitfial oC Supec-Elevativn Calculations for the Curves at Rotchford Drive Beg. Stations at 22+51 and 33+78 Dear Ed Per aur meeting on F=ebrvary 13th, 1996 when I drapped crff the S91elley Lake street and starm rirainage plans for first submittal, you indicaced that y[au needed the super-elevation calculaciocis for the ahQVe referenced curves. EnclQSed for your reFerence and in arder tv keep thern rn a sirnple subrnittal package, we are for►h+arding the fvllawing: 1- '4VS[)C3T, Figure 640-15a, illustrating the slage and design speed dete,renination for runoff length. Based upan this chart the runoff length was deterrnined to be 100.00 feer. 2. A spreadsheet prlntout by sta[ion increment vf the tvp of curb elevativn right and 1eft for each curve noCed above. 3. A reduced capy vf the streeC sheets submitted for easy reference and review Should yvu have any cornments or ques[ions regarding this infvrmatian please feel free [a call a[ 458-fi840. Sincexely, [nla d Pacifac ineer-ing Ca. Inc. . Todd R. Whippie, P.E. TRWftva enclosures cc. Landmark Builders, Buster Heitman fi!e 707 l+Vest 7th • 5uise 260 2020 Lakewvod Orive • 5uite 205 5pakane. WA 99204 Caeur d'Alene. !D 83814 509-458-6840 • FAit 509-458-6844 208-765-7784 • FAx 208-769-7277 , ~ ~ ' ' ~ ~ ~ ~r~- , ~ ~ i , Gevinvrrrc Grvss 5acrran . , y ; L =6A5[L RUNOFF IN FEET FQR f}ES[CN SPEE[3. MPH flFe ~ [ `/,1 + r - ~ 251 10 1 3.~ ~ aa ~ so ~60 ~ zo s❑ 2 ~ 35 1 40 I 40 ~45 I 50 I 55 ~ 50 70 3 ~ 50 ~5 ~ 601 65 75 I 80 ~ 90 100 4 ~ TO •,75 8(] I 85 100 ~ 1 1 a~ 120 135 • ~ ~ 85 ~ [3 100 I 1(]5 ~ 12[? ~ 1 35 I 15D ~ 170 ~ ioo I 110 ~120 ~ 125 ~ ias ~1 r-o 180 ~2 ao 7 I120 I130 ~ 140 145 I 170 ~1-30 210 ~ 235 $ I 135~ 1451 160 '170 l 1135~215~240 ~270 9 ~ 150 ~ 1 r.5 ~ 180 t9o ~ 220 ~ 240 ~ 270 ~300 , i❑ I170 I18 a I 200 zio I 240 I 270 ~ 300 ~ 335 ~ . M[NIMUM LRI lOfl 1 100 1 125 I 125 1 150 1 175 ~ 200 ~ 24(} ~ • dased on one - 12' lane. For everp foot 6n excess ❑f 12' ,LR 1~f_ ■■~~f ned py the equat ian LR= La[ 1 4-0.04167 x) . ~ JK'~- ~Rf ~g~' 1 ~ ~ x= qumfler of feer ,n eKCesg of 12 meyona piro* poin* i ~ k ~ p1o }1/tThES} @CQ! of ptlVement erclu~.ng SflDYItleP. ~ • SUpdfillw61~on tpTe fY.l • R S R ! F= plumbCf a7 ]Z' IonGi. GCf~eh PokRlg a , 0.7Lk 0.7LR c r 4 ~ LR~ s v+ AoyL R` ~ ~ 6"1s `~e V{ 4 rv _ _ ~J a f ~ g a.7nK 4 n~ ~ x c~ L _ C Pivat poinf c L I R C Try3~ vi~QV 6] f ~ S a.~LFt 0-31- ~ c u ~o a, ~ Gra.n Cfpm i'~rEl cr~p~~r~'~ JQAe ~ul~ y~p -~~N I-6Sie of Pawemant pu~fyi~ p£ Curve_ _o 24m an7 plvof poinf ~ A B~ CrOen 1~.24N a~vot P~r~} 6ESZGFF A PIMOt P6fnt 6h CCnfipf LRe voinr I l~'6E Cf'GrA't~'G $eCf19s7 I^+ Fivp7 point L9 ~ Arown Cr~ Level f.ram sro~r ~~11 S 9 G 5 1 c R ^ L` 5~ 6.TL L~ ~ 6.3rL l I I - a p w - -iV,F Lp ~rs1$Q ; DESICH B! P f vot Pai nt vn Edge of Ppvemeni 4 ` ts ~~d~~ o~ ~4 c~,y'~►°"--` Outsids of Curve Crowned Sect6pn, ~ V 4 ~a fA r ~ ~ m c B t ~ 41~ 0.24 0.29H RivOT POinf EdQ@ of QavBileRf I{~~ldg O~' CuryB O~1d piv4T pv,nT ~ ror•v Cro.rv Crarn L CvC I CrDrn g 4 Cpe A q C k C _ ~v~per u n QFSICH B2 Plvafi Pflfn4 on Ed$e a# R9rer,~ent ucl [nside of Curve Crowrred 5xfifon. Supecelevotlan Transltlons fcr Highway Curves Flguro 640-i5a . Page 6411-62 Des!$n Manual March 1994 ~I , i~ ~ ~ s~~~~ELEVA-nON TRANSITIoN CALGULATIOrvS WoRKsHEEET PROJECT NAINE: SHELLEY LAFCE P.U.D. THANSITIONING T[3 FiJLE. SUPEH PERFDRMED BY: MBI STATIC3N1NG INCREMEhlT = 25 f# DATE: 3J1196 D1ST T4 LiP OF GlJTTiEA = 18.6 ft. STREET HAN1E: ROTCHFORU QRIVE STATlON INTERV►4, 22+51.88 TD 24+01.98 TRAN5ITI(3hi OUT RIGHT CURO CL STA 5LOPE GL ELEV. TQP OF CURB ELE1. 2251.08 -0:04 2065.33 2054.98 2276.98 -0.03 2055.96 2055.80 2301.98 -4.02 2056.45 2056.47 2328.88 -0.02 2068.80 2056.82 2361.08 -0,02 2057.00 2057.02 2376.98 -0.02 2057A7 2057.09 2401.98 -0,42 2057.04 2057.02 2278.09 -0.0296 2055.99 2055.83 * PLAT BC]UNDARY ' LEET GUaB CL S`PA SLOPE CL ELEV. T+OP OF CURB ELEV. 2261.98 0.04 2055.33 2056.46 2276.98 0.03 2055.96 2056.91 2301.98 0.02 2058.45 2051.21 2328.98 0.01 2058.80 2057.38 2361.98 0 2057.00 2051.39 2376.98 -0.01 2057,07 2057.28 24[]1.98 -0.02 2[)51.00 2057.02 2278.09 0.0296 2055.99 2056.93 * PLAT BOUNDARY ~ a~~ . y i` 1 ~ 0 ~ SUPERELEVATION TRANSITION C AC.CULATIONS WC]RKSHEEET - ~ ~ PROJEC"f NA11AE: SHELLEY LAKE P.U.O. TRANSITIDNING TC3 FUI.L SUPER PER~ORAAED BY. MBZ STATIONING IfVCRENVENT ~ 25 6#. QAx€: 311 J96 DIS7' TG LIP fJF GiJTTER = i8,5 Ft. STREET NAME: RGTGHFL,]RD DRlVE STREET NAlUIE: RUTCHFC3RD OFttVE STATIQN INTERV 33+7$~63 TO 35+2$.53 STATIQN dNTERV 38t68.27 TO 40+18.27 TRANSiTCON IN TRANS1TfQN OV7 RICaHT CLlRB RIC HT CllHB CL STA SLQPE GL ELEV TC7P OF'CURB EE.EV. CL STA SLC9pE CL EL.EV TOP OF GUAB EL 3378.53 -0.02 2037.48 2037,5] 3868.27 0.04 2024.88 2026.01 3403.53 -0.01 2037.63 2037.84 3893 27 0.03 202467 2025.62 3428.53 Q 2037.65 2038.04 391627 0.02 202446 202522 3463.53 0.01 2037.54 2038.1 2 3343,27 0.01 2024 25 2024.83 3478.53 0.02 2037,29 2038A5 3968.27 0 2024.04 2024.43 3503.53 0.03 2036,90 2037.85 3993 27 -0 01 2023 83 2024:04 3528.53 0.04 2036.38 2437.51 4016.27 -0.02 2023.62 20^c3.64 x x x x x x x x x x LEFT CUR8 LEFT CGR6 CL SfiA SLC7PE cL EzEv roP oF euRB ELEu. GL SYA 5iC?PE CL fZEY TOP OF CURB EL 3378.53 -0.172 2037,48 2037.50 386€3.27 -0,04 2024.8a 2024.53 3403,53 -0.02 2437.63 2037.66 3893.27 -0,03 202467 2024.51 3428.53 -0.02 2037.65 2037.67 3916.27 -0.E32 2024.46 2024.48 3453.53 -002 203754 2037S6 3943.27 -002 2024.25 2024.27 3476.53 -0.02 2037 29 2037.31 3968.27 -0.02 202404 2024.08 3503.53 -0.03 2036 90 2038.74 3993.27 -0.42 2023.83 2023.85 3528.53 -0.04 2036.3€3 2038.03 4018.27 -0.62 2023.62 2423.84 x x x x x x x x x x r ~d~ A ' r ~ ~ , k ~ ~ t . i i S P O K A N E C O U N T Y - -OFF7CE OF THE COUNTY EIVGWEER • A DIVIS[QN OF THfi PUBLIC WORKS DEPARTMENT Ronald C. Hormann, P.E., County Engineer Dennis M. Scott, P.E., Director MEMO TO: Board of Spokane County Commissioners FROM: Gary Kennaly, P.E., Planning and Traffic Engineer~ DATE: October 24, 1994 SUBJECT: Response to Shelley Lake public hearing comments FILE: PE 1750-94 / Shelley Lake PUD Thank-you for the opportunity to make additional written comments on the Shelley Lake Planned Unit Development proposal. After careful review of the Shelley Lake file, other approved subdivisions affecting this proposal, testimony taken at the public hearing both oral and written and sound engineering practices and principles, Spokane County Engineering is providing the Board of County Commissioners with this response letter and recommended amended conditions of approval, (hereto attached). Spokane County Engineering still recommends a public road connection between the proposed Shelley Lake PUD and Rotchford Acre Tracts. Without this assured future connection approxinately 141 proposed lots south of Shelley Lake would be provided access via only one route. Adequate circulation of people and vehicles as well as emergency service vehicles is our concern primary in the review of proposed subdivisions. Spokane County Road Standards under Section 1.02 states that The following principles should be used as guides in planning transportation systems." *"Adequate vehicular and pedestrian access should be provided to all parcels of land." *"Street patterns should be designed to eliminate out-of-the-way vehicular travel." *"Street patterns and names sbould be logical, consistent and understandable to satisfy the needs of emergency and delivery vehicles." 1026 W. Broadway Ave. • Spokane, WA 99260-0170 •(509) 456-3600 FAX (509) 324-3478 TDD. (509) 324-3166 i~ ~ , ~ r Pa$,E TW{] She1Tey Lake *"Traffic genecatvrs within the project shouTd be considerea and the street system designed appropriatety." *"Wben a subdivision has the patential to generate mare tha-n 200 trips per day, the subdivision street system should provide access out of the subdivisian in at least tvo Ioeations." With khese things aforementioned in rnind 5pokane County Engineering cantinues to recommend this pUblic raad cannection, Phasimg of the Ganstructican of this connection to public rvad standards by the developer v4+ifl ensure that am adequate transition frarn the new develvpment to the exi5f3ng development wviU accur aver tittne. In respanse to testimany relafiing to Cvnklin Road and the rnanufactured home paak vwned hy Mr. Bnuge, Spokane County Engineering has amended its evnditions of apprvVal to minimize the impacts to Mr. Bauge's aevelopment. The recommended rvadway cross-section for ConkTin Road naw provides for a cvntinuous twa-way left turn lane ft'om the realigned 4th Avenue intersectivn north to Sprague Avenue. This two-way left tura lane wi11 serve to protect tlae integrity af the traffic tua-ning mavements bath to and froua tt7e existing manufactured hame park. Any additianaZ raght vf way needed to provide this two-way left turn lane is to be deaicated fram the developez''s side of Canklin Road. T)ue to both timing and funding uncertainties pr-esently assvciated with tbe future Sauth VaIley Arterial extending througli the area, aIl reference to future Rvad Improvement Districts have been removed frflm the recommeDded ccaraditions of approval. The impacts of the future South Valle.y Arterial on bvth adjoining land uses and existing Spokane Caunty road crassings should be determined at the time an approved Sauth Va11ey Arterial project is under consaderativn. Spokaae C4unty Engitaeering wvuld he happY to prowide any further infarmation ar avcumentation at the Boards' reguest, thank-yvu for yvur cDnsideratian. Attachments: Revised County Engineea Conditions of Apprc+val i ~ a~ P OFFTCE OF rHE couNTY gNGrNEER SPOKANE COUNTY, WASHTNGTON Octuber 24, 1994 Tp: apokarae Courrty Planning Department (Current P],anning Adma.raistrator ) F'ROM: Spokane Couraty Enqineers I7epartment 5L1PJ: Subdiwision Conditions, Name Shelley_LaLe_PUQ Na.dmber PE 1750-94 re: Subd iV a.sa.ons The T-o-I].iDwing~;,Gonda.tir.ans of Approva7." fcrr the above referenced subdivasavan are sukama.tted t~.~ tFae Spokane Coijnty Board of Gounty Commzssiorters for a.nclusion in the "Finda.ngs and Order°", E 1 The Cot°!dit.Loflcl apprcival of t he p 1at is va, aen by tFaP County Engineer subject to dedicatic-n of rxqht-of-way and approVal of the road system as indicated ir~ the preliminaa-y plat of rc-cord. E 2 TF,at plans, profa.les and cross sectiiDns as desiqned tc= C~nunty standards showa.ng proposed street centerZa.ne and c+.erb grades be su{amittPd tr, the County EngaE.neer for approVal prxor tr, constructzon and/Lr tFre fa.ling of a fixnal plat; road p1ans to be prepared under the direction c,f a 1icensed Profes~ional Ciuil Erigzneer. E 3 Trrat drairiaqe p1ans and desiqr-s calculatiorts showing the aliqnment of draa.nage fac.ilities be SlAbmitted to the C~~iAnty Engineer ~-Dr approva1 prior to constr,_iction and/c,r tt7e fa,la.ng of the final plat. I]rainage plarrs to be prepared Ltnder the directic,n of a lxeensed Prrifessiona1 Civil Engi,neer. E4 That the requ].ations o-f the National FlpiP_fd Insraranee Proqram he observed since the proposed piat is assocaated with an area of special ~lcpod hazard. A development permit shal x t~e obtained from the County Engineer before corrstrLictic-n or r~evelopment begins on any parciperty aJ.l or aportxon of wr-iirfi is in aray area c-f specxal fl-,od hazard 4reference Spol.ane County Orda,nance 88--0521a A That tF,e foll-z-winsa staternent shall appear watha,n the . ded a. cator}r 1 an4uaqe of the pl at: - paqe 2 "Developmeni: within tl-i.is subdivision sl-tal l conform to the reqLtiremerits of the National Flood Insurance Proqram and Chapter 3.20 of the Spokane County Code. PLtrchasers of property in this slAbdivision are warned of possible floodinq or pondinq and the p-Dtential requirement to purchase Flood Insurance. This warninq shall be carried in each and every deed drawn to transfer ---)wnership of any and all property within this plat in the Area of SpECial Flood Hazard. " E 5 Construction within the proposed publ tc streets and easements shal l be performed under the direct supervision of a licensed engineer/surveyor, who shall fLtrnish the County Engineer with "As Esuilt" plans and a certificate in writing that all improvements were installed to the lines and qrades shown on the apprc-ved construction plans and that all ciis{:urbed m01-lUmeni:s have been rPplaced. E E IVo constrUctian worE•: is to be performed within the e•r•istinq or proposed Public Riqht-of-Way until a permit has been issiAed by the County Enqineer. All wor4:: is sLtbject to inspecti-Dn and approval by the County Enqineer. E 7 All constr-uction within the existinq or prc-posed PLtblir Right-of-Way is to be c-Dmpleteci pri-Dr to filinq the final plat or a bond in the am~ Dunt estimated by the Caunty Enqineer t-D cover the cost of ccnnstruction of improvements, cc-nstruction certification, "As Euilt" plans and monumPntinq the street cenL-er-lirie> <sl-iall be filed witl-i the County Friqineer. E 9 No direct access frc-m lots to 5tub Road connectiuns until sl_ich roads are constructed tO COlAnty Standards and established as County Roads. E1O Road ciesiqn, r_onstruction ai-id drLain~:.~ge ccintrcil fcir 1/2 Riqht- o-f -Ways and StLtb Rc-ad connECtions are the responsihi.l i•ty of the developer. Ei 1 That appropriate pr-Dvision be made that the fo11-Dwinq described propPrt:y be held in trIAst unt.il tl-ie cont.inuatic-n of the strPets be dedicated c-r deeded: A 1 ftn strip at the ends or edqes of all si:rects that terminate c-r border the . plat boundary. (Temp-Drary cI,tl de sacs- are required when streets terminate at the plal: bcoundaries. ) paye 3 E12 The applicant sl-~~--juld be advised that individl_ial driveway access permits are required prior to issiaance of a buildinq permit for driveway approaches to the COlAnty road system. E13 Dedication of 10 _feet of additional Riqht-of-Way alonq Fourth Avenue. E13 Dedication of tG_Eg~_le-ll __..~'~J feet from centerline of additi.onal Riqht of Way alcinq ConE_lin_Road. E13 Uesiqnation of a "Tract X" road 60 feet in width from ConE:.lin RiDad to the east prc-perty line for futi_tre Fourth Avenue ic reqlaired. Th•ie r.iqhi of way cieeci shal l be e:ecutccl by the applicant and heid in tr-ust by Spok:ane County until E.-.1_tch time as the right of way is reqLtired by thE Sp~~ikane C-Dunty Enqineer. E14 Astatement shall be p.laced in plat rJedication that nc. direct access be al lowed from 1ots 1:o the S,_~~_~th 'Jal ley Arterial,_Fc-urth_A_venue_and Rotchford Drive/ConFclin. L15 That a atatement he placed in tl-ie pla•l; ciedicatican providing for futL!re sl-Dpe easements as reqLiired by Spok•ane County alonq F~~~_~rth~ Aven~_~e Fr1;en<.~i~~ri. - E16 E:istinq C~Dunty roads (ad jacent to and) providinq direct ar_r.ess to the plat shall he paved and/or cLirbed to Sp,_,E:.ane CoLtnty standards. E17 That al l publi c r-Dacis within the plat be desiqned and constructed to Sp-.-jE;ane Couni:y si:andards. E1H SiciPwalE.:s are requi.red alonq the arterial(s) on C--Jn4-1in Aveni_te and Fourth Avenue. E19 The word "applicant" shall include the owner or clwners cof the property, his heirs, assiqns and successors. E23 The C-Di_inty rnqineer has desipnated Typic<al Roadway Sec1:.ion Number Two,_C21lector Arterial standard fc-r the imprc-vement of Rintchford Driv_e which is to be constructed withxn the propiDsed development. This wi 11 require the instal lation of -40 fi;. of asphalt. The c,:,nstrLtcL-i---,n cif curbinq and sidewalE.: i.s _a1 so requa.red. Phaseci constrLtctic-n of Rc-tchford- Dri ve f ' , pa4e 4 would be permitted from Fourth Avenue south with operation and maintenance as> a private roaci until such time as Roads "J" and "k:" is required as part of a final plat. Rotchford I)rive while servinq as a private roaci will still be built t-D public road standards. At such time as private roads "J" anci "K", as delineateci ori the preliminary plat of record, are constructed to serve 1ots in that particular phase af Lhe plat, the corinectian to eiistinq Rvtchford Urive will be 'required to be constructed as a public road with establishment of a public road firom Fourth Avenue suuth to the e:;istinq Rotchford Drive. E24 The County Enqineer has ciesiqnated Typical Roadway Section Number Tw2t_C2l lect2r Arterial standard for the improvement of C20L1 in R2ad Whi cn is aci.jacent i:o the pr~ ~posnd developrnent. This will require the addition of appro;imaL-ely 41 ft. of aspha1L- alony the frontaqe of the cievelopment beginni.ng._at_the_realigned_F~~~~~~rth7_Aven~_ie_and F:~tending_t~~_Sprag~_~e_A_venue. To minimize the impacts tu the existinc7 manufactured home parE:: Which ar_ces ses Con4rlin Road, thB YocZdWcZy CYoSS-52Ct1ofl 5hcZ11 provide foY a continuou5 tWo- wC7y left turn 1ane fi°om the realignecl 4th Avenue to Sprac7uE Avenue. Any additional riqht of way requirernents to meet this condition shall be dedicated by the applicant. This riqht of way requirement is only applicable to property under control of the applicant. The construction of curbinq and sidewalk is al yo reyuired. E24 The County Enqineer has desiqnateci Typical Roadway Section Number Tw2,_C21 l.gct2r ArQrial standard for the improvement of F22rth AZ2nLT which is adjacent to 2nd within 1;he proposed devPlopment. This wi 11 require the addii:ion of 2e 12 appro::imai:ely 4Q_fggt of aspha1 i: along the frontaye ofi the development. The constructi on of curbinq and sidewal k. is also required. E26 The proposed privste roaci (s) as shown on the preliminary plat servinq in excess of 20 lots with ext~n~i~_~n t~~_serv_e_8 ~~r less f~_~t~_~re l~~ts_~=~n_~r~_~p~rty_e~s1:_~~f_Sr~elley_LaE:e_and future publ.ic Right-of-Way tr-ac{: is approved by the County Enq.i.rieer. E27 That private road (s ) be :improved to SpoF•ane County standard for a private road Urban/Suburban PUD standard aervinq in e~,:cess ~~f 2C~ lc~ts. S~_~b jE~ct t~~ ~~~~pr~~val ~_~nder secti~ ~n~ 10.207 of the SpoF;ane CounL-y Fire Cnde. } 1 i ~ paqe S E30 Al l vested owners shal l siqn and record private road documents as prescribed by the SpoE•.ane County Engineer. 1"hese documents ahal l be reviewed and approved by the Spokane County Engineer prior to recordinq with the SpoE:ane County Auditor. Recordinq numbers shall be referenced in the dedicatory languaye of the p'lat. E31 1"hat the fol lowing statement be placed in the p1aL- dedicatian: WARNING: SpoE•ane County has no responsibili.ty t,--. build, improve, maintain or other wise service the private raads contained within or providinq service to the property r.1escribeci in th.is plai:. By acceptinq this plat or subseyuently by allowinq a buildxnc7 permit to be issued on property on a private road, Spok•ane County assumes no obliqation for said private road and the ownErs herEby acE:rnowledqe that the County has no obl.iqation of any k:ind or riature whatsoever to establish, eiamine, survey, construct, alter, repair, improve, maintain, provide drainaqe or snow rEmoval on a private road. This requirement is and shal l run with the land and shal l be binding upon the owner, thPir fielYS, SuCCE'SSoYS oY aSSlqf15 includinq tfiE obilqdtlof1 to participate in the maintenance of the private road as provided herein. E32 The proposed plat shal l be improved to the standards set fOYth lfl SF]oE•:cif1E Collflty BociYCj o'f CotTtlTl.'1551oners f2e5o1 utlofl Nbo. 80-1592, as amended, Wnicn establ.ishes requlations for roads, approaches, drainaqe and fiees a.n new constructzon. E33 The County Enqineer fias examined this developmerit proposal and has determined that the impact o•f this proposal upon the e;istiny County Road System warrarits the dedicatz.ori of additional Riqht of Way and the roadway improvements her-ein specifi.ed. E35 That the fo11owinq statement must be placed i n the plat dedi cation: "The private road as shown hereon is an easement Wnicn provides a means of inqress and eqress for those lots within the pl<at havinq frontaqe therPon and_ngt m~~,re tl-~an £3 1~ ~ts_aci,~ac~rit_•t~ ~_Sl~~t~l l~y_L~~E..e__t~ ~_th~_~~~,~;:_n~_~t witf~in_tf~is_plat_" E61 The County Arterial Road Plan identifies the 5g2th Valley , Arte.rial as a Princigal arterial. The e•r,istinq riqht-ofi-way width of 90 feet i.ss not consxstent; with that 5F1E'GJf1E?Cj in the Plan. In order to imp].Ement the Arterxal Road Plan, in _ adciition to the required riqht-of-way deciication, a si:rip of paUe 6 property 3l feet in width a1ong the S~ ~~_~tr~_Val ley_Arterial frontage shall be set aaide in reserve. This property may be acquired by Spok.ane County at the time twhen arterial improvements are made to the S~~~att~_Val ley_Arterial by payment of the fair marF:et value of said future acquisition area and iqnorinq the restri.ctions placed in said future acquisition area by the5e conditions7. E61 The County Arterial Road Plan identifies Fv~_~rth A_ven~ae as a 9211ecOr Arterial. The existing right of way width ofi Q feet is not consistent with that specifieci in the Plan. In order to implement the Arterial Road Plan, in addition to the required right of way dedicatiun, a strip of property 5 fee1: in width along the F22MAv_9929 fron{:aqe shal l be set asidP in reserve. Th.is property may he aCCau.i r ed by SpoE: ane County at the time CwhPn arterial improvements are made to F2MrQ_6ven2e by payment of the fair mark;ei: val+ae of said flltllY'E' aCqu1.s1.t1of1 aYf?c7 by tf1E.'se Conditions?. L-90 rne applicant should be advised 1;hat t;here may e:isL- uti lities either unclPrground or overhear_I affectinq the applicants property, includinq property to be dedicated or set aside for future acguisitir-~n. Spok.ane County will assume no fiinancial oGliqa{:ion fior ad.justments or relocation rec7ardina these util.ities. The appli.cant should cheGE:: Witn the applicable utilities and SpoF:ane County Enqineer to cleterminE whether the applicant or util.i•ty is reaponsible foY ad.)ustment oY Y2LoCcit.l.of1 CoStS cZflCi to ma4•:e aYYcZI"1qeff1-'f1t5 for any necpssary work. Special Conditions: The appli.cant has proposed a. 3 foot berm with a fence constructed on the top of the berm alonq the perimeter of the F'UD, si4ht ciistancE analysis, (vertical and horizontal), shall be done at the public and private ro~.zd intersections as well as F►rivate road and private road intersections to ensure tfiat safe siqhi: ciistance is not comprornised because o•f this construction. r►erms and fences may have to be ad.justed to comply wi th safP sighi: distance requirements. The applicant shall be responsible fior the connection of Rotchford Drive {:o• Roi;chforcf Drive currently terrninatinq at the riorth property boundary of Rotchford Acre Tracts. Vertica1 and hori:ontal sight cJistance based on ciesiAn speeci of that _roadway shall be complied with. To maE:e the connection, certain cons{:rucL-ion rnay be required within the public Yiaht of way of " Rotchford" Dr a.ve witha.n Rotchforcl Acre Trar.t;s, the appl-i Ccan{; - - page 7 shall be responsihle for any requirements relatinq to tFvis off- site construction of this roadway constrricticpn. A arada.rrq arwd erosion control plan shall be submitted for revxew and aPproval of the County Engineer prior to any soil disruptxon c-n the proposed site and shal l he made a part of any phase the final p1.at. Constr'uction of Conklin Road per the requiremerrts aforementioned shall be done in the first phase. 7`his e,anstruction is required trecau~~ of the er.isting cond~tion of Conklin Road and the pour 1eve].s of serVice at the zntersection of ~ourth Avenue and Sialla,van Road. Tn ronjunction wath the Conklin Road improvements the real igned Fourth Avenue shall also be e-Dnstructed. Any undergrvun+d wori.• for the placemerit iaf th,~ future sa.gnal at C~nk]. in Road and Sprag,_ie Aver~~~ shal l alsc- ve done i,n this first phase. Financiak responsibilsty for sxgnal.a.zation at Con~1in F2~ad and fiprague Aveniie srEai i be the rep-Dnsa.ba.l ity of the app1 a, cant . Consta°uctivn of the sxpnal shall occur whaen tFas.s a.rrtersertion meets warrants for siqnaiizatkon as outlined in tF,e Manual ofi l.Jnifvrm l"raffie ControX Devices. TF,e Coff1pT'£?faef153Ve Land Llse P'lan, more specifitally the Arterial Road Plan, an element of the Adopted Compreherasive Land Lise Plarr, designates the 5i,i_ith Valley Rrterial as a ContriDD.led Arces, Pra.ncipal Arterial. Tree present plan r~oes rto't show an intersPCtion of this faCility witFr Gorsklin Fioad. Based un this ap,proved plan, the applicant shall be responsible for the eonstructa.on of Fourtfr Avenue from Cnnklin RJaad east to Steen Road tn Spokane Gounty Road Standards. The appl.i cant shall eonstrtuct or provirfe aclequate surety for this improvement prior to the final pFaase of this proposed piat, provided tFris ctwrydition shall be null and vofd if the Arterial Road Pkarr a.s chanqed to reflect an at qrade crossinq of tt7e ao+_ith Valley Arterial and Cc,nklin Road. Wxthout this condition of approval SpoF;ane County Enga.neering would recommend denial of this p],at, since a pre-aasisting plan del i.neated nu at grade crossing of the S~.~uth Va11ey Arterial wsth Gonklin Road and the applicant was aware of this condi$ion privr to this publ fc hearinq. Adequate r-M'adway infra-structure would not he available for this plat without tfaas provision since the LeVel of Servi.ce fior the intersection of Fourth Avenue and 5u17,a.Van Road xs a.nadequate for this p1at at bl_ii ld OExt. G]ff -site ri4ht of way for this improvement shall be secured by Spokane County and the appTieant shall reimburse 5pokane County for a proportionate share of the cost of the right of way. . - i paqe 8 I TI-ie Faurth Aveno_te L- ;tension Road intersection with Conk:lin Road shall be aliqned so as to provide for the potential aliqnment of of Fourth Avenue as a fe--)ur way intersection. Spokane Coun{:y wi.ll ncit vacate the preserit Fourth AvenLie riqht of way to allow for this futiare connectirin. ~ I , ~ Spokane Ccaunty Engineering Dept. RECEIVED I3ec. 2$, 1994 W. 1026 Broadvvay Ave. D E C 2 9 1994 Spokane, Wa. 9926(]-0170 saaxANE cauNTY FNGINEEH At#n: Mr. Pat Harper Reference: Shettey L,ake Praject, ZE 1750-94IShelley Lalce PiJD 1. f.]ct. 24, 7994 Response ta Shelley L.ake puhlic hearing comments to Board of County Conunissianers frvm Gwy Kennaly (Engr). 2. flctaber 24, 1994 document to Spo. Caunty Planning Dept. fram 5po. Cvunty Engr. Dept. (Fat H.) - re - Subdivisrvn Cvr+ditians. Dear Nir. Ha,rper: On Ncavember 28, 1934, we spmke regarding the 5ubdivisivn canditions seferenced in item 2 ab+sve. I had garticular interest in the paragragh on page 8(dealing with a potential Future Four vvay intersectivn of Forurth Ave. and Cvnklin Rd.) vf this dsacument. L]uring vur conversatian, yvu indicated that the Fourth AVe.IConklin intersection wi11 rernain as s'hown vn the plan (Faurth cuirving southward from it's present lacativn) bu# were not sure vf the full meaning of Faragraph 8 and stated that you would inwestigate it and get back with rne. T have not yed heard fram yau. Please let me know the present status. Have there been any vther revisions to tfie road plan`? If a revised drawic►g has been required ta defnne the modifications to the project rvads, pTease send rne a capy of the reuised plan. Thartk you. d9-~4 Leonard Bouge S. 304 Gvraklin Road - office 'Weratlale, Wa. 93037 (509) 326-5300 cc: Tim Lawhe.ad, Spv. County Pl'anning Dept. Pau1 Bastine ~ ~ F ' . . - . ' ' ~ •f . ` ' - . , i