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DUSK S 2322 VERA WATER POWER 900K WATER TANK DUSK LN S 2322 , ~ C,~ l1•~ f DATE FINALED ENGINEER' S REVIEW SHEET _ CHECK WHEN LOGGED IN FINAL . BLDG. PERMIT # -or -FILE# B95044-9; Related File P-1724 TRACT E) Date to Review 3-20-95 Time 10:00 # PRE-CONSTRUCTION Date to AA & DR Time Date Received 2-23-95 Project Name VERA WATER POWER 900,000 WATER TK No. Lots No.Acres Section - Township - Range SITE ADDRESS DUSK LN S 2322/N 32ND/E ST'EEN PARCEL # 25544-9045 Applicant's Name MIKE POWELL-BOVAY Phone # 838-4111 Address Work # Date Conditions mailed Contact person Phone # FLOOD ZONE V NO W S SCHOOL Engineer / Surveyor's / Architect's Name Planning Contact Person Phone # 456-2205 , Date Submitted Description Initials _ 4 AGREEMENT TO PAY FEES OR PRIORITY FEE COMPLET D& COPY TO ACCOUNTING . t C FINAL PLAT FEES COMPLETED & COPY TO ACCOUNTING I NOTICE TO PUBLIC # 1 3 4 6 COMPLETED - OR NEEDS TO BE SIGNED DESIGN DEVIATION SUBMITTED ALTERATION TO PLAT - BLOCKS & LOTS BOND RELEASED -ROAD & DRAINAGE IMPROVEMENTS HEARING EXAM APPROVED DENIED- APPEALED BBC / PROJECT APPROVED DENLED ~/3 ~9v~ .o i • ~ 12-,o < .e A) c sbo NSP Le'('f P i Y 31 s r'IANs £ c4 lc- s we TQ J)eQ..) Fi~A,Jz Z,z k~~0"e_A,_J . _S ~1v ~ ~S c c~,~.> - dt--t- . ~ • ~ . k\p\t\review. for PROJECT NUMBER= 9500085~ APPLICATION DA(`1= 02/24/95 PAGE= 01 THIS IS NUfI' A F;ErcMIT PENALTIES WILL BE ASSESSED FOR COMMENCING WORK WITHOUT A PERMIT SITE STREET= 2322 S DUSK LN PARCEL#= 45254.9045 ADDRESS= VERADALE WA 99037 PERMIT USE= 900,000 GAL STANDPIPE PLAT#= 005490 PLAT NAME= MORNINGSIDE PUD PHASE I BLOCK= LOT= ZONE= SR 1 DIST#= F AREA= 00000000 F/A= A WIDTH= DEPTH= R/W= 35 # OF BLDGS= 1 # DWELLINGS= WATER DIST = VERA OWNER= VERA WATER & POWER PHONE= 509 924 3800 STREET= PO BOX 630 ADDRESS= VER.ADALE WA 99037 CONTACT NAME= MIKE POWELL - BOVAY NORTHWEST PHONE NUMBER= 509 838 4111 BUILDING SETBACKS: E'RONT= 0 LEFT= 0 RIGHT= 0 REAR= 0 REVIEW INFORMATION DEPARTMENT REVIEW REQUIREMENT BUILDING REVIEW COORDINATOR - J SHATTO COMMENTS: ~ ~ •r ~ AlrAcgeW F BUILDING PLAN REVIEW REQUIRED C, COMMENTS : PG'C4„R, Lbi . ~ e(~~ owg 1.~►~1 ~ AV ir~•~~l11~ ~ j~1 d'I~S am ~G lomme ENGINEER SITE DRAINAGE TO BE REVIEWED iCct~T~ COMMENT S : HEALTHDIST NEW OR ADDITIONAL WASTE WATER COMMENTS: Cd eZ.r . P.LpAiNING ~ SITE PLAN REVIEW REQUIRED - . . / COMMENTS : SCAPCA EMISSIONS TO THE AIR JZ/~, COMMEIJTS : . FIRE DISTR FIRE FLOW TO BE REVIEWED ~ L • l ~ ~ " ~ ~ ~n PROJECT NUMBER= 95000855 APPLICATIOlq ~ DATE= 02/24/95 PAGE= 02 COMMENTS: BUILDING PERMIT CONTRACTOR= UNKNOWN PHONE= STREET= UNKNOWN ADDRESS= UNKNOWN WA UNKNOWN NEW= X REMODEL= . ADDITION= CHANGE OF USE= DWELL UNITS= OCCUP. LD= BLDG HGT= STORIES= BLDG W X D= X SQ FT= SPRINKI,ER= N REQ PARKING= #HANDICAP= CRITICAL MAT= N DESCRIPTION GROUP TYPE SQ FT . VALUATION STANDPIPE M-2 VN 447264.00 - ; . ITEM DESCRIPTION QUANTITY FEE AMOUNT . ~ ~ ~ . , ` - ' ' COMMERCIAL VALUATION Y 1857.50 PLAN REVIEW E'EE . Y_, 1207 . 38 , STATE SURCHARGE Y4.50 ENGINEERS REVIEW Y 50.00 COMMERCIAL SURCHARGE Y 551.68 _ . , ,ZOCD-PERMIT REVIEW; 119 Y ~22.00 ' . . ' . • ~ .'`'S .7 i 4' ? . . : `i'. ~ •~4 " ,P - • . . PAYMEN'TSI:MMARY`''*~r**~***~*.y***~********~***** ' • 'a ~ ~i,.'nf: ;4:?1 •f+ ' t'fM . , . ......,i-•.' ~j. r J `1", • L . , PAYMENT DATE RECEIPT# y. . PAYMENT . AMOUNT , . . . , j 1 . , , ' . , . 0 2 / 2 2 / 9 5 r . 0 0 0 012 0 9 ~;~:•2q7 9.,. 3 8' , . , . . r . • _ , • . . . - ' . . : •f 1 • ' --'-L--------- 9 : 3 8 't . ' ' ' TOTAL' DU E_ ' 2.41~3 .,6-8 TOTAL,. PA'I D-u 2 7 ` PERMIT TYPE FEE AMOUNT AMOUNT "PAID AMOUNT OWING • . . . , BUILDING PERMIT ' ' 3 6 93 . 0 6 j'1~27 9 . 38`' `-°-2 413 . 6'8 3693 . 06 , F ,127,9. 38 . 2413 . 68 , . . . . . . , T.: . ' . . . • . ' i' . . :i PROCESSED BY : JUY,IE SHATTO PRINTED BY: JULIE SHATTO- _ . _ _ _ . , ' • . . . THANK YOU ' . - , ~•eyj j . i1, ' • , . , . 1 , • ' , a ` • i , . - .S s . . ' , .n-'.~:1~;:'r:.j ~ iC.~~,.vo"'•„► 4.'r \y;'~ . • . . , , , , ' ' • ' . . > t',. . . . , • , . " tik .i , r ~ e` - S P O K A.N~ o C O U N T Y OFFTCE OF TNE COUNTY ENGINEER • A DNISION OF THE PUBLIC WORKS DEPARTMENT Ronald C. Hormann, P.E., County Engineer Dennis M. Scott, P.E., I?irector March 20; 1995 Vera Water & Power Standpipe South 2322 Dusk Lane Permit No. B95044 Pre-Construction Conference Comments 1. Integrate design of standpipe overflow system with all elements of subdivision runoff system. Plan sheets from the subdivision project are included with this comment sheet. 2. Submit calculations showing that the volume of the current pond is adequate to contain the overflow, based on the conditions outlined in Spokane County's "Water Tank Overflow Requirements. " 3. Submit calculations showing that the 10" PVC overflow pipe will be adequate to convey the overflow to the pond. 4. Fulfill all other requirements listed on the handout. 5. Submit soils information demonstrating that the vault drywell will perform as specified. 6. Submit copies of all downstream overflow easements. 1026 W. Broadway t1ve. • Spokane, WA 99260-0170 •(509) 456-3600 FAX: (509) 324-3478 TDD: (509) 324-3166 Pu 7 ~^Fl~ ~I ~~_L 1/ c L~J ~ REPORT OF 3/20/95 NR.,N:-,APPLICATION CONFE12ENCE Nn' R 2 ~ 2322 S Ihisk Lane - 900,000 Gkuifon Stand Pipe 5~~~~~~~ ~~U.WY EpGiNEEFI I NAME I ADnRFSS ~ CTTY ~ STATE ~ ZCP ( P[iONE ~ coN'r'wCr OWNER ~ Vere Wetcr & Power ~ PO Aox 630 I Vetgdole ~ WA ~ 99037 ~ 924•3800 ~ CONTRACTOR ~Conan Constr 12400 N Vlribur#38 ~ Spokene I WA ~ 99206 I ~ CONCRACTOR ~Morse Constr 15500 S lat Avcnuo ~ Evcmtt ~ WA I 98203 ARCFITCf?CC I Bavay NW 1808 E Sprague Avcnue ~ Spokane I WA ~ 99202 I 638-4111 I Mitc Pm.cU STATE ENVIkONMENTAL POLiCY ACT (SEPA) The proposal may require a review for conformance to the State Environmental Policy Act; however, in accordance with WAC 197-11-926, the applicant being a governmental agency is considered the lead agency. PRO.TECT OVERVIFW Construct 900,000 gallon stand pipe for water distribution and storage. Stand pipe will be 104' tall and 40" in diamctcr. 10 x 14 control house. SUMMARY OF PROPOSED occu- IAND U98 PANT CONST FQtB PARCEL ZONB ACI'IONs TYPB BUILDWG U98 SQ.[tI'. GROUP TYPB FLOW WAT6R Pl1RVEYOR / PHONB 45251.9043 1 SR-I I7.S-6042 I New ITank I M4 I IIIN I 1000 IVcn Water dt Power (924-5600) I I I IPmp Houm I B-. I VN I i DISCUSSION TOPICS (clarifications, additions, and corrections to written comments) ZONING (456-3675) CONTACT: LORNE LAKSHAS. * Written comments were prepareci & a copy given to the applicant. * After discussion, Zoning signecl off their portion of the building perniit. ENGINEERING & ROADS (456-3600) CONTACT: PAUL LENNEMANN * Written comments were preparecl & a copy given to the applicant. HEALTH DISTRICT (324-1560) CONTACT DARYL WAY * Health is ready to release permit. FTRE DISTRICT NO. 1(928-2462) CONTACT: KEVIN NIILLER * Neecl 30' inside turning radius up into struchire. DIYISION OF BUILDINGS (456-3675) CONTACT: KEN JEFFREY. * Written comments were preparaci & a copy given to the applicant. * For information on tlie Americans with Disabilities Act, call 1-800-435-7232. * Effective 4/1/94 all commercial projects shall demonstrate compliance with the Non-Residential Energy Cocle. SEE REVERSE FOR PERMIT RELEASE REQUIREMENTS , ~ PERMIT RELEASE REQUIREIIMENTS Please submit seven (7) sets of revised site, drainnge, arui landscape plaru' jblus thiee,t(3J complete sets of construction drawings to the Department of Buildings for acla+owledgemerit and distribution to all the appropriate agencies. In order for all agencies to expeditiously process your project, it is important that submittals include all necessary drawings and documents to insure that review of your project is completed in the least aunount of titne. Docurnents should include: building tuldress anul legal description of property. - Spokane County's Project Review Coordinator will be Julie Shatto at the Div. of Buildings (456-3675). LANNING ENG[NEERS HEALTH ~ PIRE HUILDINCS ~ . . . . -:..:!P ' ~ ~ .ti..~ . . . k ' i. ~.y ~ : ~i : v •r:. . r..:::::•::::•::: •.•T:~ ~'i:~ ~ ~ {_r ~ i•:' . r... •S:S: tir::::tiv.~}: v . i •~i~~~~• :~r:•'r'~::• ' 'r~ ~i:•:ti~S}::<"v'r . • . . . • . . ' ...:1:.::::•... • • f..Vl1.~.Y: J . . 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L ..f :j,{:;::;:•,: ~ ::'1.:::: ~:•)Sv.. ~v ~ :v ti f~! ::t. }r ;y.,{.; .r.~; :%:j :,'v,.y .f:.}•:.};. . :.t n..... ~A~j~] :v: v v • v: :::v ~ ~ ~ :rti}' . . fr ~ i'~fl' r • v.: ~x . ~ . iir i% :r ..y.yv: $ ..~~.~~~~'.T.Li~.R~~~~:ti?K4.~~~4~Yf{'!..'.~aL.'.ti':.LU.{:•:•.:1.......1.\r.\..ti...;..•.• . .........5~...{ .~~~{{'.ti......~r'.~'.:~ .........•.........'.{Y~1'15{V:l~{.1..J..~J~•.1.... .~L~S~~{ti.ti,..~fll:`.•:r':•.~~`ti{•.1.~lJ. . 3 1 JISpecial NREC Plan Review Approved Plan & Calculations X 4 1 lEasements (downstream overflow) X 5 1 1 Soil info (Vault Drywell) X 6 1 lSpecial Inspection forms X • : . . . . . . , . N.v.~. r.x.~.r. .r:: i•:: ~.r- r:: .:r•:r .rr: r~• . .rr r . . . . . . . . .2 . ~:{.\{{~7S<~2.: +~{•:•::+•'r.: ~ r .{r{r Yl+.:'+ . f .-0f M:{r i ,f ; 4 ~......n ..ti .4.::?;i.::<{:}y} <:t,~•.vr.. it~. ~:,k. . . l . ~ . . . ~ . • ~lM1 . . ~ ~ • L . . . . . . M1... : ~:r......... C• ..~•NY i.hY .K.\ .~Ny• ~ • . • . • . : . ; , . . { ,~:qt~. ~ ti•~ ~.ti:•:::.:•::: r<2 ~'~:•f: t~x?Sc•: ..,xk.• ':#•:.:L : rr..:,. .1•.. • :.LL ~ t ~ • 1.4i }.V:.\:•: ii: f . } r.~ ~ ~ r::: . r.. r rrr:.::. ~~i::::~~r :~r:: ~ r:: r. • r: r: : r. k•.ti~~~:•>.,• :::}:r.... f;?:•:::::::: . '~i: . W_ " ..:.:;::rr:~ .x--- . . . 7 1 IStructural drawings w/wet stamp X r) . , ~ ~ ~ig~ure of Coordinator Signature of Plan Reviewer Project No: V~ Spokane County Water Tank Overflow Requirements Provision for having a overflow system for the water tank, downstream of the tank site, needs to be addressed. Two general conditions are generally encountered: 1) an established conveyance route is to be provided; or 2) a storage pond is to be constructed. The criteria for both conditions are listed below. 1.0 Overfow Coaveyance 3ystem • A conveyance route is to be provided which extends from the overf low tank to a receiving water or regional storm facility. The regional facility must have adequate capacity to handle the overflow waters both volume and peak flowrate. A receiving water can be a river, lake or other body of water of significant size. • The conveyance system is to have suff icient capacity to convey the maximum flowrate anticipated in the event the tank overf lowed. Open ditches are to have sufficient capacity to not overtop or erode. • The maximum f lowrate anticipated is to be equal to the pumping capacity, under design head, of the pump(s) servinq the water tank. Backup pumps in the water system are not to be included in determining the design flowrate. • Provide plans for conveyance facilities are to be constructed and incorporate them into the road and storm plans. • If a portion of the conveyance system is located off-site, then easements will need to be acquired. If a portion of the conveyance system is located in road right-of-ways, then a license agreement will usually need to be obtained for this use of the County right-of-way. • Provide supporting documents which are to include, as a minimum: an exhibit showing the conveyance route from the tank to 1--he receiving water/reqional facility, exhibit of easement location (s) , and legal descriptions and title reports for each of the proposed easements. 2.0 StoraQe Pond Svstem • The storage pond is to be sized to contain the overflow from the tank, at the water pump(s) capacity, for a duration of 8 hours. (Volume, V= pump capacity x 8 hrs.) Storm drainage ponds can be used as a tank overf low storage pond provided there is at least 0.5 ft. of freeboard in the pond when the design volume, V is contained. • Water 17 a& Overf lc Reauirements of Spokane Countv _ page 2 • If _ess than 8 hours of storage is provid than an emergency, re.:onse plan, prepared in coordinat..-n ;4 _th the water pu:: -syor, is proposed, reviewed and appi.-- .---ed. • Th =.flaximum inside slope of the pond is depths up to 3~ For depths over 3 ft. the pond to iave a maximum ir. _de slope of 2.5:1. Facilities with Ade --slopes steeper th _ 5:1 shall be fenced as approved by -{a C:unty Engineer. A_-_ storage facilities shall be planted Lype of grass ap-:oved by the County Engineer. • If :'he pond is located outside of a Hyd~= :ioq=-- Group A soil (p~=: SCS classif ication) , then it must : denrnstrated that th` soil can inf iltrate the water by pr.- a.dina infiltration tes _s of the pond site. In either case, the design volume cc- :uted, the pond is to completely drain 72 hours. If the soil types are pre-approved by the ::unt r ior drywells, th-, drywells can be used as an outflow zavic-a to drain the por_ . • Pr :-"de a conveyance system, from the t.t :iK ~3 the pond, in acc :rdance with the criteria listed in S-.::r ior. 1.0. • Prc _3e plans of the proposed overf low :.:---.3tem ; including an ovri --a11 layout, a grading plan for the :;nd ~nd associated de-r_.=1s. Incorporate into the road and •-:)rm -)lan set. • I f : portion of the overf low system is 1'ated of f s ite, then ea=-:nents will need to be acquired. • Prc- _de supporting documents which arE eo _nclude, as a mir: _num: an exhibit showing the SCS soil '.°jpe --:ze pond is to be '.ocated on, exhibit of easement loc'.~ :1on', s), and legal des,_ ~;ptions and title reports for ea.--•. of the proposed eas =-ments. If infiltration testing is : ided, then repor ts ana :ast results are to be provided. ..E-. - ~ ~~z ~-~-1. ° 'sr „ - VERA WATER & POWER 9009000 GALLON STANDPIPE EMERGENCY RESPONSE PLAN INTRODUCTION: The purpose of this section is to describe the Vera Water and Power emergency response plan. The emergency response plan describes the procedures that will take effect in the event of an overflow of the 900,000 gallon stand pipe. The emergency response plan has two main components: 1) Operating Controls (electrical and mechanical) to prevent an overflow from occurring. 2) Actions that will be taken, by Vera Water and Power personnel, in the event of an overflow. Operatine Controls: The operating controls are those electrical and mechanical devices that will be installed and used to monitor standpipe water level and transmit a signal to shut off the pumps and/or close the standpipe inflow valve priar to standpipe overflow. The standpipe water level will be measured with pressure transmitters in the valve vault. The redundant pressure transmitters sense pressure differentials and determine the water level in the standpipe. The pressure transmitters detect the water level and input a signal to the Vera SCADA (Supervisory, Control and Data Acquisition) RTU (Remote Terminal Unit) in the valve vault building. The booster pumps are started/stopped based upon programmed signals received at the pump station RTU via the SCADA system. The redundant float activated switches installed in the standpipe at the high water operating level closes the standpipe input butterfly valve. Prior to standpipe over flow, this level is also inputted to the SCADA system to alert Vera Water and Power operations personnel. Following are the overflow prevention measures taken at the standpipe: l. Redundant standpipe pressure transmitters located in the standpipe valve vault. 2. The SCADA system is programmed such that both level signals are sensible . (within a defined tolerance) or pumps are turned off. y. . 1 ' t ~ c - _ 3. During a period of loss of SCA.DA system transmission to either standpipe RTU or booster pump station, the RTU defaults to pump's OFF. 4. Redundant float switches sensing water level greater than high operating water level, but less than overflow, close input pipe butterfly valve and send overflow level alarm to SCADA system. 5. The loss of power at standpipe closes the input pipe butterfly valve. In addition, the valve actuator/operator is spring loaded fail safe to close. Vera Water and Power EmerQencv ResDonse: The SCADA system sends a signal to the main operation center computer where the entire Vera water and Power water system is monitored. When the pumps that control the water input into the standpipe shutoff, the computer monitor at the operations center receives a signal via the SCADA that sets off an alarm. The alarm alerts the operation personnel to the fact that the standpipe is full and the pumps are operating as designed. If the pumps do not shut off and the pumps continue to fill the standpipe, a second alarm is set off at the operation center. At this point Vera Water and Power operation personnel manually shut the pump off at the operation center. Vera water and power has operations personnel on call to handle emergencies 24 hours a day. The on call operations personnel can be contacted by pagers and/or phone when . there is an emergency. If an emergency occurs these personnel have the capabilities to shut the pumps off at the main offices of Vera Water and Power or to shut the pumps off at the pumping station. During hours other than the standard business hours, the phones switch over to the emergency number. The emergency phone number is monitored by personnel that contact the operations personnel in case of an emergency. N:11060\571M108 ~I a ~ - C S P O K A,NIE C O U N 7' Y OFFICE OF THE COUNTY ENGINEER • A DNISION OF THIE PUBLIC WORKS DEPARTMENT Ronald C. Hormann, P.E., County Engineer Dennis M. Scott, P.E., Director r; . March 20, 1995 Vera Water & Power Standpipe South 2322 Dusk Lane Permit No. B95044 Pre-Construction Conference Comments , 1. Integrate design of standpipe overflow system with all elements of subdivision runoff system. Plan sheets from the subdivision project are included with this comment sheet. 2. Submit calculations showing that the volume of the current pond is adequate to contain the overflow, based on the conditions outlined in Spokane County's "Water Tank Overflow Requirements. " 3. Submit calculations showing that the 10" PVC overflow pipe will be adequate to convey the overflow to the pond. 4. Fulfill all other requirements listed on the handout. 5. Submit soils information demonstrating that the vault drywell will perform as specified. 6. Submit copies of all downstream overflow easements. 0 1026 W. Broadway Ave. • Spokane, WA 99260-0170 •(509) 456-3600 FAX: (509) 324-3478 TDD: (509) 324-3166 1 VERA WATER AND POWER NE1N WATER SUPPLY STANDPIPE • 5 Calculate runoff from drainage basin. Volume of runoff for the first 1/2 inch of precipitation from ` impervious areas is calculated to determine infiltration volumes required. This is in accordance with Spokane County stormwater guidelines. Peak runoff for the 10 year and 100 year design storms are calculated for the entire area of each drainage basin. The 10 year design storm is used to size on-site drainage structures. DRAINAGE BASIN Step 1: Calculate total area and combined "C" value. Area (Lcj uC" Value Impervious Area A j:= 0.11 C I:= 0.9 Pervious Area A p:= 0.22 C p0.25 Total Area Area:=Ai -t- Ap C ._AI•CI+AP'CP ~ Area Area Area = 0.33 Acres , C c = 0.47 G, l'A:!' Step 2: Calculate volume of runoff ( first 1/2 inch of rain). Vol I:= A I•43560• 0-5 12 y 'y ~J • Vol 1 = 200 CF 2543 7 Step 3 Calculate Swale Area Required Depth:= 6 viches ~ ~f0lV ~ AL - swale Vol Area ~Depth' Area swale - 399 sf ~-ExP~AES trls, ~ 12 ~ r Step 4 Calculate peak rate of runoff for 10 and 100 year design storm using rational method (Q= CiA). Note: time of concentration calculations are separate. Tc = 5 minutes i 10 3.2 1100 5.1 ~ ~ Q 10 C c'1 10'Area Q 100 C c'1 100'Area Q 10 - 0.49 cfs Q 100 - 0.79 cfs VERA.MCD 1 1/24/95 ~pOKa F ~r~N TY FEB 2 21995 orv e - i,oirvG ~ BOVAY ?EI~GIf~lEERINC • ARCHITECTURE • ENVIRO~l~~E~l7AL SERVICES ' - - . . - ' - ' ' ' ~ Q~~,ro~a»e • C~i'r!!!e • O~rei~ertaii • '~ri-E'ilie.r • `~?'vrllau~ ~ 'O~ ' . ~ - _ ~ ~ . . ~ . . . - ' - BOVAY NORTHWEST INC. • " ' . , • _ ' ~ b ~ A SUBSIDIARY OF DAMES Bt MOORE , A _ ~ - ~ ~ ; ~ ' ~ ~ • ~ ` . ` . • 808 East Sprague Avenue - ~ ~ • ~ ~ ~ ~ ~ Spokane, Washington 99202-2189 Y A BUBSIp1ARV OF , i Y. OAML~9"B. ,.,~ooRE ~ - . . , . ~ • _ ~ . . (509) 838-4111 Fax: (509) 747-8537 , , ~ . . . . . . - - '.RECEIVED . . . . • ' _ f : . ~ . SPOKANE COIUNTY March 31, 1995 _ • , . _ _ r ~ ~ ° ~ , • , ~ / Mr. Dean Franz ILpING, , . ~ Spokane County Engineers Office y , . , . - ~ ~Y~ - ~ ' ~ 1026 W. Broadway•Ave . . r - ~ f ` f ~ Spokane, WA. 99260-0170 , .,^f . ~ . - . ~ ~ ~ . ' . • ~ . • . ) ' ~ RE: ~ Pre-Construction Comments for '900;000- . Gallon Stand ~i e~ - .2322 - S. Dusk~ Lane. ' Bovay Pro'ecpNo. 1060-571 .~'~~r ' . ~ ~ . ' ~ ~ . r . -.:Dear ~Mr: Franz: ~ ~ . . ~ , ~ _ . ~ , . , - - ~ Y ~ . ~ ' ~ ' _ . • 1 ^ • N ' • • ~ _ \ , , ' - ' , •I~ ♦ . ~ ✓ r ~ ~\L ~ • ~ rl ~ ~ ~ ~ , ~ \ ~ - . . ~r This letter,addresses the written comments prepared . for the referenced project by Spokane , ~ . _ . . . _ . . County Engineering and Roads Department and given to Bovay--Northwest at: the pre-_ . construction coriference on March 20, 1995. - - , ~ . f : r - \ • ,i . : , ~ . ~ ' ~ -r, _ - . , .J . . 1. Integrate design of standpipe oveIl-flow,,system with all elements of the subd.ivision. - . ~ runoff sy.stem:) Plan sheets from *the subd.ivision project are included with this ' `comment ~ sheet.. , ' . . ' ' , - ~ ' . . , . - ' • . ~ ~ , . ~ ' . . . ~ ' f • C - ' . . . ~ r , . ' f - ~ - i . , ~ . ' - ` , The attached revised site plan (Plan sheet 9-C-1) -and details (Plan sheet 9-C-3) . show the new"location and profile for .the 10-inch PVC drain line and the 10- inch ductile iron overflow line. The above-mentioned lines and drywell have been coordinated with the final location of,Pond No. 8 of the Morningside Phase I, addition. ' • ~ • . • ; ~ 1 - r ~ ~ - _ ~ _r . • ' : • ~ . ~ , ' ~ i. _ ' • • ' ' ~ . ' • ~ . ) ~ / i . 2. . Submit calculations showing that the volume of .the pond is- adequate to contain ~ the*'overflow based on the cond.itions outli.ned in the Spokane County's."Water, o - .-Ta.nk Overflow -Requireinents:" , _ . ~ . . ~ _ . . ~ . . . r . , . _ • ~ ~ ~ ~ . . Morningside P:U.D. Phase Pond No. 8 does not have -the volume to. contain the: pump capacity (800 gpm) 'for a period of eight hours: Therefore, Vera.~ . Water, Power devised an emergency response plan for the 900,000 gallon . standpipe.. ~.Multiple copies of the ' "Vera -Water & Power 900,000 Gallon Standpipe Emergency Response Plan" were submitted to tlie ~Spokane County:" . , . - . Building Department personnel on. February. 22, 1995. 'The~Plan.outlines the - ~ , redundant deyices (level transmitter,s,-float switc}ies, .etc..) to be. ~installed,in~the standpipe and/or valve vault which will constantly update the control- center as~ ' . - , . . ,r~ . . ~ . . ~ - ~ . : - ~ ~ ' ~ T~ ~ ~ ' ~ I . . , . , ~ f , , 1 . ' , ~ , ~ - ' / ' , . . . . ~ , • - _ . - % 1 ` . . _ ,r , . . • ` / 1` ~ . ~ . . ~ • • - _ / ' ~ \ _ ' ' ~ , r ~ ` • ~ • . . ~ " - • ~ J Mr. Dean Franz - -2-' March 31. 1995 , . - . _ . - - • - ~ : to the status of the -pumps . The -control center will then take the appropriate . " - . actions to insure proper` standpipe water level at all times. The plan should be ava.ilable for your review at the' permit center central 'file. for this project if it-\ . , . . . . ~ . -,has not 'already ~been 'disbursed to your office. 3. Submit calculations showing that the 10" PVC overflow pipe will be adequate to , convey the-overflow to the pond. , ' - ~ ~ ~ ' - - 1~~ • , ` . ' , , The'standpipe.and, site drainage system consists of two' 10-inch pipes: . - ~ ' ; . _ ~ ~ ~ ' . . - . • . . . . . ~ ` • ' ~r , : . ' t . ~ , ~ ' ; ' . , A. ~ Overflow/drain from the standpipe to the area retention pond: t"~ ` ; ' - ` \ . ' S _ ' ~ ` r ~ - / - , a ~r.- From an • ~nlet that collects site drainage to the area retent~on po.nd. . . . ~ . ' , . . ~ . ' . ~ ~ . . ; , ANALYSIS : : . _ . ~ • ~ - . ' ~ ~ < . . - . . . . ' . . . . ~ % ~ . - ' . ~ ~ ~ ` r - _ ' • _ ~ - ~ ~ • , . Attached is an analysis of the capacity of both drains (Attachment A). - The-analysis results' are'summarized below• J'.~~ _ ~ i• . A.- ' Overflow/drain This pipe wa's~ analyzed for both open channel and full pipe ~ flow. The operi-channel flow analysis indicates the system probably would not flow full except where the, Pond-' water surface elevation is~above the'outlet. pipe 'invert elevation, but flow conditions could be, close to full pipe ,flow . , See Open Chan,nel-'Uniform Flow analysis attachment A. ~ . _ . . / ~ . ~ t ` ( ~ ~ / ~ c ' - S ,t • ' Normal tank drainage is controlled by a valve, and -the" drainage flow~ rate can , . ~ be.limited. -,The worst condition is if a pump .fails to shut down at full tank,' and water is overflowed at the pump rate. Under full pipe flow condition, the calculated water surface elevation, in the. drain would 235., feet_be~low ~the tank overflow weir. J i - f ` . 1 • ~ 'ti - ' ~ . , ; - . This analysis indicates: that the ,10-inch-- diameter drain is` more than adequate ~ ~ for the expected flow -conditions. See Full Pipe Flow analysis atfachment A. • ~ . . ~ - ~ . , i. , . . _ . _ ! . ' , \ J . ' • , _ti / ~ ' ' ~ ~ 1 ` , ' + ' ~ ' • B. Site Drain: . This, drain -was analyses" for full pipe : flow*rconditions when the V Pond water surface was at maximum design lev_el and the inlet water surface , _ -3-- ~ ; - _ was at the top of the inlet swale. _ , . ~ 1 ; - • _ . . ~ • ~ , . - . ~ - , ~ . - . , - - ,1~ . . • - r - . 1 1 i - ~ . ~ " Y . - - : . , • ~ ~ ~ ; . -.The 10-inch; 'diameter drain is ~more than adequate to ~convey the ~siter runoff; - from ~the 100 year storm although -the analysis. -is for only' ~ the 10 ~ year storm. . , • , . " i ~1 . r- ~ . . . ` . : ~ - ' . . ~ - ` - • l~~ . ` • . . • ~ . ~ • t . , • • ~ . " i • ' , / . , ` ~ _ ~ •l • . . . . , - . . - _ . . . . • r ; : - ~ ~ f ~i' r ' ~ . ~ ` ~ , , . ~ ; , _ : , , ~ \ ` ; . , ` . • , _ ` . . . - ~ . . ~ _ • _ _ - - ' • ` • . ; _ . • . ~ , . . , . , ~ • , , ~ J ' . i . . ~ , ' ~ . ~ - . • , 7 ~ ~ . ~ , ~ . . l. . ' - Mr. Dean Franz -3- - March 31. 1995 . - , ~ , . - - - ~ ~ ; . . . . , - . . , See analysis 2) included under the attached Full Pipe Analysis. r- . 4. Fulf'ill all--other requirements listed on the handout: - ~ ~ ~ ` ; ~ r . ~ i , _ , - ' ' • ' ' The actions taken on prior and subsequent comments, fulfill the overflow ~ . - - - . , - , - requirements.' f , ~ ~ ~ , . ' ` 1 , . : t r' - ' " , , • _ . , ' - ; - 5. Submit soil information demonstrating that the drywell will perform as specified. , \ j ; _ - • , , \ _ ( ~ ; l. The puipose of the drywell is to act as, a temporary` sump, for, the yalve vault. 1'here is the potential for a small amount of residual water to be left ~in the lines ~ - ~ , - . . . . 'after the'vciater.,-to th"e standpipe is 'shut-down. ; During maintenance' of the valves - and/or piping in the valve vault this water may be drained on ~to . the floor -of the valve vault. The -floor drain and the drywell provide an exit for the water from ~the.: valve vault; 'so 'the Vera Water Power. personnel performing the maintenance will not have to stand in water while performing their perspective duties. . .It,~.is antic'ipated that the residual water left in the lines will be 1`ess than five gallons:. f j . - ' \ . • ' r , ~ , .1 ~ ' ' l . . , • , ~ • , ' ~ . ~ 6. ~rSubmit ~ copies ~of aIl the downstream ovei-floiw easements. ~ ~ ' • , ~ • - ~ . . • • ~ • - • ~ , , ; ' ~ . . , . _ • ~ , ' _ ' _ . The attached overflow easement (Attachment - B) _ was ` granted . by •,the Morningside Home' Owners Association to Vera ,Water & Power to use Pond ~ " . No. 8 -as -a standpipe overflow, facility: - ' , - . . / ' ' ~ . ` . - : , • ; j, ; / ' / r~,, _ ~'Additional easements downstream were norobtained, because* ~no ~overflow ~water is anticipated to leave 'Pond No. 8. .'The attached infiltration calculation for'Pond No. 8(Attachment C) show the outflow from the pond '__ia infiltration: J ~is approximately 855 gpm.',1 Duri ng an-overflow event approxirr~ately. 800-gpm' would flow into- the pond,. ~ - ' . ~ . . , . _ ~ . . • ` . r . . ~ ; _ . ~ r . . _ . . The high water level in the -standpipe is, approximately elevation 2473. -The . standpipe', overflow is approximately; elevation 2475. When, the water level , - reaches elevation 2473 the. redundant pressure .transmitters send a signal to the - , ~ pumphouse to shut off the pumps,~ then4hey send a signal to the=main control center at the offices of Vera .Water & Power as to the status of the pumps The attached calculation (Attachment D) shows there,is-,approximately„1-8;800 , gallons~of extra (storage'.between- the~high water elevation and* overflow.. ~ elevatian. At the 800 gpm 'fill rate, there is approximately~ 23 minutes from the .i' ~ time Vera Water & Power' receives the first sign.al that the. high water `mark has been reached until the -water reaches the oyerflow level:_ " ' ~ f~~~ 1 . _ . . ; , . ; .r . ~ . . - ~ . ~ ` . . . , . _ ~ . . . ~ ~ ' _ . . • , ' `I ` ,r ' . . ~ ~ . • . ' ~ 1 _ . • ~ - . , . , . _ . \ • , . , ' ! 1 ' ' • . • _ , . t . • ~ . - - _ _ , ` ' . . , ~ . ~ ~ March 31. 1995 - , • ~ . ~ . , ~ ~ ' ' . . , ~ _ ~ ` • . -4_ . ~ , ~ - . ^ , • . ~ . . . , be redundant . . . D~n Franz ' , • on there ~'~~1 I d Signal, d - , Nir. . . ~ h elev a~ a- secon w ater . ~ . e establish~ hlg 24?3 .5) that wl~ Send hex Six e~- is . a potential . . ; " e th o~Tnate.~ e l e a t i o the n co~~ t a t t 1~~~ ~ a l l o n s inqheS ab~ a pr °i ~enter . . s C p , ~ c i Y n a t el y M. fi~ at switche . flo ~ t~e p u P S and t~ no~if y s p o i n t t h er~ is aPPro A t. the go~ ~ _ ed• - overflo`~ , , reach n to shutoff t to occu~' At un~l bou ~Q,~r elevation ~ nd~ sign~. _ . , ovexf lQ'N capacity un~ '~e ~ 'n' ~e SeC . . ~ . . , • - . ' _ : ; ~ , . . , , . o~ storagea~at~ly 1 -utes - 1, h~ the , . . :xate~ thexe appro- S stem and • ; ~ ! ~ - on theu y the~ , . Qccurs. hour-m°~tor center via ~ ~ _ . . _ . - n~ns a 24 _ m the control` t Q~ devices _ shu . ~ . povver m~ umps o Vera water & o~ - any of their p ; and the P _ t o f the.~edundanr p om u y , ss to tre , . ca ability to . shu In the , ewent that ) f ai~ simultaneusl . . . p S Stem. oat Switches , Sen~~Ve, with acCe ~have and ~ the ~ . - . , t~leme~Y y ~.tters fl & power xepre ~ be on-site and. ~ . , . . ~ . . . J • . ~ CPreSSUre, tra~ ff ' a vera water'_ _ the,-Prp , ~can ~ hut o , Shuto~ . , S o dOeS n d the, ablllt ~ ~ . ~ . - ~ . . . • ~t ean - yt tes•~ . . . ~ 1.5 ~~'u . , ' ~ ~ 83g-4111~ ~ . ~ M,~• ~ _ . _ ut , 9) pu~'ph shOUS . o~ vv ithi;n at (50 p ~ purc, l ase. call me ~'rer ~l.ueS~ons' p e au haye any . Sincerely ~ A If y o 'j ~ ` , • > ~ ' ' ~ _ . • f • ~ ~ y . 1 ~ ' • , , _ • ' ti ' ' . t ~ , ' • t ^ ' _ . ' ~w ~ ~ . ' t . ~ • ~ ~ ~ • ~ 1 powel~ , ~ . ` . ~ r ' • - + 1vlichae1 - ; ~ . } , t . ~ ' ` ' . . , r . ~y,• ~ _ , "j ~ . _ . - i. ~ . . . . . . ~ ~ ~ - . , . . • ~ . - , ~ ~ : ~ ; t , ~ , • ~ - - ~ • . - . ~ . . . , . . \ . . . :Attachments ',Wer ater ~ po , . ~ . . : ~ v in ~'ells, ~1era ~ o~hweSt ~c: Ke ~ Bovay N. t . { . . Larry B1ggs ? , ~ - ~ . ~ ~ ~ / • ~ • : _ ~ r ' ~ ~ - . . , ~ , > ~ 1 , , , . , _ . , • . , , _ ~ ~ . , ' ~ , - . r, , ~ . , ~ ~ • ~ ' , _ t. , ~1 ~ . - • ~`.ti . - ~ - . l ~ • . ~ . . . / i . ' , , . l ' . , , ~ . ` ~ ` f . ~ ^ ~ ~ • ti . ' ` , . . ` ~ j ✓ . , . . ~ - ~ • . . . Y t ~ , ! - _ ~ ~ ~r~, ` t r ` f ~ . ~ ' '1 ' - ' , ~ y Y', i ' "7 ' ~ ~ . " . . , ! ` - ` ~ , , . . . ~ ` . • ` , ~ - ` : ; ,t ~ • _ . J r t + ~ ' j • ` ~ / `t , . i . - . ~ 7 _ . , , _ _ ~ ~1 , ~ ~ „4 ~ t~ . ~ : L • + , . . • . - . • . ~ ' ! - ~ ~ . r . t~. ~ ` . - . ~ ~ ^ , ! . .C n ' L . • _ t. . - ' 1 ` , • r~ , . ~ff ~ • ~ ' ~ r • . ~ , ' ` . ~ ` ~ ~ , ! 1 • ~ - ~ . , + ~ ~ , ' ` ~ ~ ~ ' , ' ' 1 ` - _ N :C]06U\571\L\1d2,- . ' ' - ' ; . ~l ~ ' • . • ~ ~ ' ~ . ~ ' , ~ ' ' ~ _ v~ . . , . - - ~ - . . : , l • r • = ' , . . ' . } - ' ~ ~ . , - . . - 1 \ _ . - • . • . , - ' • ' • , • i _ , • . ' _ ~ , . • . r ~ . . . ' z . ~ , f ~ . ' , • • ' ' ~ , . _ . t - ,r J , ~ , _ • ' _ _ - • r • C. . % . . - r ~ ~ • . } + • • - = ~ . - . , . ' , ATTACHMENT A Overflow and Site Prainage Pipe Capacity Analysis • y Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Uniform flow Worksheet Name: Vera Standpipe Comment: 12" drain analysis: open channel flow Solve For Actual Depth Given Input Data: Diameter.......... 0.83 ft Slope 0.0070 ft/ft Manning's n....... 0.013 Discharge......... 1.80 cfs Computed Results: Depth 0.67 ft Velocity.......... 3.82 fps Flow Area......... 0.47 sf Critical Depth.... 0.60 ft Critical Slope.... 0.0090 ft/ft Percent Full...... 81.29 t Full Capacity..... 1.81 cfs QMAX C.94D........ 1.95 cfs Froude Number..... 0.79 (flow is Subcritical) ~o R. 0~-WASy,~~ CO r,2 : , ~O 10139 ~L .~i ~~ss FGJSTEP~ . AL ~ 3/~ll95- EXPIRES -5730 Open Channel Flow Module, Version 3.12 (c) 1990 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 VERA WATER AND POWER 900,600 Gi4L•. STAND PIPE DRAINAGE S STEM CAPACIT ANAL SIS Bovay Northwest, Inc. By: H. R. Gordon, P.E. SCOPE: Analy e the diameter of the following two drainage systems: (assume full pipe flow and the pond is at design water surface elev.) 1) Stand Pipe Drain 2) Site drain 1) STANDPIPE DRAIN: + A) Characteristics Flow, Q: = 800 gpm, 1.8 cfs, pump capacity Diameter, D; = 10 inch nominal Length, L; = 620 ft. to top of overlow Elevations; A) Inlet; = 2576.5 Top of stand pipe overtlow B) Outlet; = 2341.0 Max. water surface at Pond Total head, H: = 235.5 ft. Vel., V, (Q/(3.14*D ^ 2/4) = 3.27 fps. Vel. Head, h, V" 2/(2*g) = 0.17 ft. N Reynolds No. (V*D*p/u) = 221,003 p, density: = 1.94 slug/ft. ^ 3 u, Viscosity: = 2.4E-05 Ib-sec/ft. ^ 2 Surface Roughness, e,; = 0.0120 e/d = 0.0012 f, friction factor,: = 0.02 for e/d =.0012 & N= 221,003 B) Required Head above Pond design water surface, H: Trial pipe length, TPL: = 150 ft. H= 0.5*h +(f*L/D)*h + 1.0*h = 0.8 ft. 0.5* h= entrance loss, 1.0*h = exit loss h = vel. head, ft. , Pond water suface elev, PWS: = 2,341.0 ft. (Design) Water surface elev. @ max. overflow rate: = 2,341.8 ft. (2,341.0 + 6.7) Actual pipe length to develop head loss: = 150 ft., O.K. = Trial Pipe Leng. C) Maximum drain capacity: H=(0.5 + f*L/D +1)*V ^ 2/(2/g) pR. G ~vya~, Available Head: Overflow - pond water surface el. R v o~ 235.5 = (1:5 + .02*500/(10/12)) *V ^ 2/(2*g) ~ 'a G V^ 2 = 925.9 ft^ 2/sec ^ 2 APR/ 3 9 V = 30.4 fps , Q = 16.6 cfs O.K.: > 1.8 cfs pump capacity R i C~, ~ - . . . . . • ~crsTEa~° ~~A~ yNG CONCLUSION: 10" stand pipe drain is adequately sized. , EXPlRES : c:\1060-568\DRN_EL.WQ2 PAGE 1 31-Mar-95 • ' . VERA WATER AND POWER 900,0o0 GAL' STAND PIPE DRAINAGE S STEM CAPACIT ANAL SIS Bovay Northwest, Inc. By: H. R. Gordon, P.E. SCOPE: Analy e the diameter of the following two drainage systems: (assume full pipe flow and the pond is at design water surface elev.) 1) Stand Pipe Drain 2) Site drain 2) SITE DRAIN Flow: = 0.5 cfs; 10 yr. storm Diameter: = 10 in. Length: = 226 ft. Elevations: A) Inlet: = 2346.5 Top of inlet swale B) Outlet: = 2341.0 Pond design max. water surface Available Head: = 5.5 ft. Maximum drain capacity: H=(1.5 + f*L/D +1)*(V ^ 2/(2/g)) Try f = 0.02 0.02 V^ 2 = 2*g*H/((1.5 + f*L/D + 1) V^ 2 = 2*32.2*5.5/(1.5 + 0.02*226/(10/12) + 1.0) V^2 = 39.7 ft^2/sec^2 V = 6.3 fps Q = 3.4 cfs O.K.: greater than 0.5 cfs design flow N Reynolds No. (V*D*p/u) = 425,265 p, density: = 1.94 slug/ft. ^ 3 u, Viscosity: = 2.4E-05 Ib-sec/ft. ^ 2 Surface Roughness, e,; = 0.012 e/d = 0.0012 f, friction factor,: = 0.02 for e/d =.0012 & N= 425,265 O.K., as assumed . CONCLUSION: 10" site drain is adequately sized. ~ R. ~ (3Q OF W.QS;y~ ► e y O,~ 10139 J,. ~s . S~oP61AL EXPIRES.5 %3 c:\1060-568\DRN EL.WQ2 PAGE 2 31-Mar-95 . . , , . , ► ~ Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Uniform flow Worksheet Name: Vera Standpipe Comment: 12" drain analysis: open channel flow Solve For Actual Depth Given Input Data: Diameter.......... 1.00 ft Slope 0.0030 ft/ft Manning's n....... 0.013 Discharge......... 1.80 cfs Computed Results: Depth 0.76 ft Velocity.......... 2.82 fps Flow Area......... 0.64 sf Critical Depth.... 0.57 ft Critical Slope.... 0.0066 ft/ft Percent Full...... 75.75 Full Capacity..... 1.95 cfs QMAX @.94D........ 2.10 cfs Froude Number..... 0.58 (flow is Subcritical) .~O R• ~~,~~t,,~ 0F WASy,~,~~ ~ y r : 0 • ~ ~ 10139 9FGtSSEF~~ . ss~oNAI-'e:~ , F EXPIRES Open Channel Flow Module, Version 3.12 (c) 1990 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 C - . ATTACHMENT B Overflow Easement 1 ~ ~ , ' a { 1 1 ovERFzow AGRFF~N*r aNn EAsEMFANT KNOW ALL MEN BY THF,SE PBESENT, for mutual consideration this agreement and conveyance of easements is made and entered into by and between Vera Irrigation District No. 15 (Vera), a statutory irrigation district of the State of Weshington and the Morningside Homeowners Association (the Association) and Dahm Development, Inc. (Dahm), a Weshington Corporation. BECI'rALS: A. VVHEREAS, the Morningside Homeowners Association is the owner of certain real property legally described as follows: Zract 'A" of Morningnde Pbese L a Planned Unit Development, as per plat thereof recarded in Vohmae 22 of PlatB, Pagea 88 and 89; SituaLe in the County of Spakane, State of Washington. B. WHEREAS, Tract "A" is desired to be used for the conveyance and disposal of storm water and natural drainage. C. WHEREAS, Dahm is charged with the responsibility of constructing a drainage pond on this tract. D. WHEREAS, Vera is the owner of an adjacent tract (Tract "E") where a water storage reservoir will be constructed. NOW, Therefore, the p$rties oavenant, oonvey and agree as follows: 1. Dahm will canstruct and install a drainage pond as required by Spokane County for the purposes of storm and natural drainage and for the purpose of collecting storm water overflow, if any, from the Morningside subdivision. 2. Morningside Homeowners Association egrees to maintain and operate the drainage facility as required to meet the requirements of the Spokane County drainage plan and related regulations as they pertain to the Morningside subdivision, Vera shall pay all maintenance, repair and replacement of the retainiiig wall and fence. - 3. Vera agrees to reimburse Dahm for the additional costs required to enlarge the drainage pond to accommodate the overflow requirements of the Vera water tank. Before construction has begun, Vera agrees to pay for the retaining wall, the installation and cost of bentonite in the berm, the fence around the pond and all other cost increases attributable to Vera's use of the pond, as well ss engineering and surveying for design and construction of the extra items needed due to Vera's use of the pond. ` 4. Morningside Homeowners Association, in consideration of mutual benefits, hereby grants and conveys the following easement to Vera Irrigation District No. 15; ` • U • An easement over, under and across the above named real property for the purpose of conveying and disposing of overflow water from the reservoir to be built on the adjacent property, including the right to construct, maintain and operate thereon such lines, drains, pools and easements for the purpose hereof, and including, but without li.mitation, the right of clearing brush and timber, and the right to entry upon said land and to erect, operate and permanently maintain thereon the usual fixtures and equipment required therefor; provided nevertheless, that nothing contained herein shall diminish the duty of the Association to maintain the storm water drainage facility. b. If the Association fails to maintain and operate the drainage facility in good working order, Vera may give written notice of such failure to the Association and if not corrected within the period of time indicated in said notice, Vera shall have the right to correct said mauitenance failure at the expense of the Association. 6. The easements granted herein shall run with the land. The beneCits, provisions and obligations of this agreement shall be binding upon and inure to the benefit of the successors and assigns of the parties to this agreement. " This agreement may not be modified except through a prior written amendment executed with the same formalities as the present agreement. 8. Vera agrees to indemnify and hold harmless Dahm and Morningside Homeowners Association from any and all damages, including legal fees, they may incur as a result of any tank leakage/overflow on Tract "A", any lot in Morningside or any adjoining (downstream) or affected property. IN WTINESS ~ MRE F, the undersigned have set their hands and seals this ~I day of f Y\ f~ ;Z L, f` 1 11995. VERA GATION DLSTRIG'r NO. 15 . ~ - By its: General Manager D DEVELOPMENr, INC. dFL'zZ.4&- By its: President MO IDE H VV'NERS ASSpG7A7ION . + By its: J • ~ ~ • t ~ ~ Y STATE OF WASHINGTON ) ) ss. County of Spokane ) On this day personally appeared before me RICSARD T. DAHK to me known to be the President of DAHd DEVFLOPMEN'r, INC., the corporation that executed the foregoing instrument, and - acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he alone wes authorized to execute the said _ instr.,ument~ . _ ' ` ~,~•,r,, er my hand and officisl seal thi.s ~ 4yofMarch,1995. TAgk 'r~%~~ - • ~ - ~ pUg ~,IG otary Public in and for the State of ; J'-,' •sFp g• O: Washington, residing in •N My Commission Expires: 0F .WA SO~~ « r STA, 8T`WASHINGTON ) ) ss. COUNTY OF SPOKANE ) I certify that I know or have satisfactory evidence that $ICI3ARD T. DAffiM is the person who appeared before me, and said person acknowledged that he signed this instrument, on oath stated that he was authorized to execute the instrument and acknowledged it as the authorized agent of Morningside Homeowners Association as the free and voluntary act of such association for the uses and purposes mentioned in this instrument. `,1~ ..;•,.oj ~'.1&V. ~te~i. C : =,9I995. ~ ~'.e c ~ ~ C/- ~ ~0 TARy ,e - = No ~ublic in anddfor the State of , ~ r p~6 L IC : ; ~"J , residing at ~ ~.r'••.sF~, ~ My Appointment Expires: ~'~C• T, p1:19~ . .`O`~. ~ ( S'~'~1~ ) Ss. COUN'PY OF I certify that I know or have satisfactory evidence that 1~c.'-v~.h-1.0t LQA the person who appeared before ffie, and said person - acknowledged that 4- signed this instrument, on oath stated that -Y~C~ authorized to e ecute the instrument and acknowledged it as the 6eP? r' rn't /j"lali&~ of e.~0 L~p ~-t ~f %kle~ ~d volunta,ry act of such party for the uses and purposes mentioned *4` instrument. Dated: lic in and for the State of No l~' . ~ , es iding at My Appointment Expireg: N/JERP.Y/REAL/LIAtlX/XSOYB'RPLO.VBR/ 3128196 ?a i- . . , Attachment C Pond No. 8 Uutflow Due ta Infiltration i • , • w ~ CUENT W~6DESCRIPTION O J T"T IO~J ~t?~. ~ro • , a~ o.n DESIGNED BY DATE 3' Zg' 1~ ~OV A Y FILE NO. IO ~00 - S ~ ~ REVIEWED BY QATE Y SHEET ~ OF ~ - - f~~-- oo4f lo~ e-"' o~ 7-~~_ ~ - - - - . - - - - . . - P . - - - - - . . - - _ - . . . _ . - - usrz~~ oc,.~~ to~~ ~,Q~-~_ ~ ~t~r~..t~q•, - _ . - - - - - - - - . _ - - ~ - - - - - - ._54c,vl%v _C-r~~~o~. uw~P~-~o~4s--_-V sAS~-~ __b~ . _ . ~c..c- t ~ ~ a~'✓' ~ ` h • _ _ W~• ~ +o~r' ~ -+1 l . _ ~ ~ s 7tN,h,S-Q.. - ~d~tX~-~-ti~ S ~ ► ~2cY ~ - ac.c a~.p tko - - _ _ . . . - - - ~ - - - - ` ~ ~ - -M,aL . Cu.' G c~l~ ~-~u..N •I S . a-~ - - Ll tov\ • _ . . . . _ " - - " . r . . - - ' . . . . ~ - - • - - . - _ . . - - " ~ - - - - . . ~ _~_~~~-Z~~+~w•~~ T~4~.,..__o-F_~ .~.'333--_-i~ - - - - ~ - ~ Z . ; ~ f _ - ~ . - . - - - ~ Z------ - - ~ . - • . R_~ ~ _ _A~ ~foX~,-\ A~=_~ _ . ~ . ~ ~'~o~; : Go._ _ s =~:~.:ti,wa ~ ~--Gu;~1►~ s_ A.^. . . ~ ~ ~ . V%O% . _r • ~ : , , , - • ~ ! _ , ~ _ . , ` , ~ i - - ~-zo; ~ ' ---Q' . = _ ! 3~• ~ ~+_~.~_S.__ ~ ~ ~ - ; ~ , ~ ' , ~ . ' r ~ - . r v ' ' ' ' ~ ~ ~ ' ' • ~ ' ' ~ . , _ - ~ ~ ` { , r ; ~ ' , ~ L ! ' ~s►~,-- . ' ' t , . _ -Z.l J1O GT$ ~^SSS~ ~m_!` , , ' ~ , , i ~ , , • • . ~ ; ' ~ i ; ' , , ; ' ' ~ • , ~ ~ , 1 ' ` ! ~ , ' • I I ~ ! ' ' ~ ~ ~ ' ' ' ~ , ' I YV~~.~l~__~_ ~ ~ . ~ r ~ • b . , , • . ATTACHVIENT D Standpipe Volume from High Water Elevation to Overflow Elevation ~ ~ • 1 ~ 1 CUENT V.a-./`c, W e..~~ 4 ~O'ti.}'Q'✓ DESCRIPTION' ' + ►'~~L ~ Dt~~1 DESIGNED BY ~;6 l OweA . 2~~ C1 - O O V A Y DATE v FILE NO. REVIEWED BY DATE ' Y SHEET 1 OF z-- y S~~ vv,.JL- ~ w~~ _ w►ov' Ov-~~to~ . - = - ~ - - - - - - - - ~ ~ ~ c, - - ~ - • - - - . . _ _ - - - - . . . - LJ. _ _ ~ lo.nv~a.c~--Ot~'T ~dt,J cVi.~1c.,~~~, _Z4' ~ S_ • ; ~ ' = - ~'"q,~`--~ - - . - - : . . . - - - - . _ . . . . - - - - - . - - - - = - V'o . - - ~ . ~ ~=---~r . : . - . . - - Z.0 , - - - Z- - - - - - _ - - ~ Ind.~~k~ - - - - - - - . . - = Y---- Ak- --l41(o Zo. =--=1ZS'~::`__4--5~~-}-•--- . - C4 z._ - - _ - Z s 13 , ~ . , , , , , i , • , ~ , , . ' ' ~ ' ~ ' ; , . ~ ' ' ~ ~ ~ , ~ ! ~ ' ~ ~ ~ ' , . 1 • i ;e ~ ~ ! ' I ' ; ' ~ ' ~ . _ ° --,o. _ i i . ~ ~ , , ~ , , i ( ' ~ ' ~ ~ ~ ~ • ~ i ~ ' , I + ' ~ ~ r` ~ ~ ~ ~ • , : ~ ~ ~ ~ , , , , ~ , ~ ` ~ ~ • ~ ~ ~ ~ , . ; . , . - - ~ ~ ' . , • , • CUENT DESCRIPTION i V►'~- Oel~'~A~JJ DESIGNED BY B O V A DATE 3~ ~ FILE NO. REVIEWED BY DATE Y SHEET Z OF . - - - Y ~ - s ~o u ~~~.o;,,~ . E-4-~-~-- w~-1~~_ ~I~- -D_ o~ P~ ~ Vv\c--A- - - . - - - - - . - - - - - . c~ ~ ~.I .~..~~-~-t _ _ ~ -Z - - • - ~ ~ - . • - - - a 10 : - - - - - - - - . - ~ - ~ = . _ _ . _ - • ~ r ^ _ ~ - - - zo~ ~ - 1. S v - . Y ~ DIV►'~~ A h - - ' S(o . :5rl:~~-.-- _ _ . _ . . . _ _V~.- = l?s~ • co~> - .G ~ . ~ I ~ _ ^_-~i---~~~ __~v _ : - = - _ ~ 1~4 -101: ~ . 5- a.a. ~i~~=_ ~ 1.~a ' ~ v '_"'a._.~ ~ ~ A ~ ~ J - ' • ' - - . - ~ ' . ~ + , t ' ~ i .~n ~ _ _ - - - ° - - - _ - - . ~ : _ - - - - ~ • • _ ~ ~ ~ ___=:i. _ ~ , - • - ~ . • I , ~ ~ „ ' , ~ ~ ~ ' ~ T_,' _ ~ ~ ~ ~ ~ ' : t • ' I ~ , • t ~ , ~ • i ~ ~ ~ . " ; ~ - - - • - , , , ~ Fil,ed far tiecQrd at aequaet of c JM HLan Revorded Itetura to t 9 4 1 r.2802 3;; f 1LE 0 ~RE4uEs7 --NaHZ ~~tine, CarrolY 6 Iverean. p~g ' . ADDFtESS _$~j2929 Spr~Lqqe , OU GZTY, BTATE, ZIP gpokart0, WA 12LI6 wi~uar, ~ • '~:',u:• n-9432 euL~~ea t~1) 17.r3 SPOKAME, couKrt. wasl'_ . • 6TA1UTORy HAitRA2iTY AEED YOI. 1685pw 7263 J Tha Grantor(a), DAHM DEVELOPMENTl INC., a Washington CarpcrAtion, in and fvr consideratifon of Ten Dollars ($10.04) and ather valuable cvneideration in : harid pa.id, conveye and warrante to VERA IRRIGATYON pISTRICT N0. 15,r the . fallawing cieacribed xeal eetate, aituated in the County of SPokane, Stqte of Waohinqton: 7'ract "E" of MORNxNGSZAE PHASE 1, a Planned Unit DeveI,opment, se per pl.at thereof recorded in volume 22 of Plats, pegee'@8 and 89; Situate in the County of Spokane, 5tate of Waehington. SUBJEGT To eaaemanca and reetxict3one cainmon to the area; Liability to future ehargea by Spoknne County for Storm Water eervica; 11ny unpaid agaeaaments er charges, aad liability to future aesessmente by vera Irri.gation Diatrict Ne. 15; Mattexs aet farth by sur'rey recarded Hay 12, 1987 under Rerording No. 8705120273 in Survey Bdok 39, page ll; Ayr9ement between Dahm Devalopmant, Inc. and 3pokane CounLy Parks, Recreatian 5 Fair AePt, recorded AugvaC 3, 1994 undez Recording tlo. 9409030458; Declaration of Covenants, Canditiona and Reatrictione intpoaed hy instrument recozded on Ockober 31, 1994 undeX Recording No. 9420310022; Netice to -Che Public recorded on october 31, 1994 under Recording No. 9410310023; DeclarAtfon of - Covenant 3.mPosed by inetixument reavrded oq October 31, 1994 under RecQzding No. 9410310513; Agxeement betwaen bdhm DevA].oFment, xnc. ' and Vere Irrigat.Lon District No. 15 racarded SePteu►beX 91 1994 . under Recozdinq No. 9409090304; Declaration ot Covenants impoaed by . inetru.ment recorded dn Novecnbar 15, 1994 vnder Itecording No. : 9411150027. Dated pecember 15 , 1994 0O~a019843 ! rxcise Tax Pa' DAf3 ~ tIELQPMEtJ'.~, INC. S 18 Pd. o Coe~ t~t r / • Ay R cllard T. Aetiilt, President ' 9TATE 0f WRSt1xNGTON ) ) ea. . C6unty af SpakAna On thie _„2'Z11( ddy of December, 3994, before me, tha undersigned, 4 NoCsry Pub].ic iri and for the Sta,Ce af Waehiatgton, dul'y commf.aeioned and swvrn, paraonniZy eppeared Richetd T. Dahm, to ma known Co ba the Preaident of Dnhm . DavelvPment, Inc., tihat axacuted tha faregoing i.nstrumQnt, and acknowledged the naid inetzumant to ba the frae and vvluntnry act aad deed of aaid corparation, for the usos and purpQeea c:herein montioned, nnd on onth atatiad cliAt he is authQrized td execuke tha said instrument.:~ . ~ ~ ~ . ' GIVEN-;undei my hand and off3,cia1 ~seal the day and year laat ab4v wzitten, 7 Pt~CEIVED ~ ~ f j: • ~ , SPOKANE CQJNTY 1il N~~~ 6 ~Ca~~' ~~lJ(/ +~1~~~ / ,`~-~('•.l~{ ~E~ 2 2199~ Pnur, A. 9AsTir,E , . • 'r' ; ; . : NUTIIRY Pt1?JLTC xN AND FpR THE $TAZ'E OF WASII ~v..>'• ; r..t,,:~~,~~<<3 Ir~~3'PON, RESIDING AT SPOKANE DIVIS 6UILDING ~ _ - _ _ - ; MY ~1.PPOINfiM~EtIT EXPIRES i Y~ 7 ' t. . • . • eEF, GOS tdOS~Elf i I ~3 31I _LSdfl . ~ ~ • ~ . ' ' •~~~b~;291 a~c~ ;•rr.o ~ ~1 . . IJR :tECoRoED ZST "'ENOMENT RE4Urs< CJW~~uTRU . . Tg gtiC 20 pECW.R.ATLQJ1 wiLLl: rl aUDl1UA SPOKJ►Nt. CCUti1'f, WA51{. OP . • CbVENATITS • CONDI'I'YONS AND ~,tESTRICTI ONS ~ ~s 8 5 (►'1 1+ . L UF ' etL~s 3 )40nJL1NGs1Qg (Phaae I) TfiTS DSCLAftATION is meda on the date hezainsftar sat forth by DAHM DSVLLbPMENfi, INC., a Waehinglon Corporation ("Declare►nt" who ie the dwner of aertai,n land aituated in the Stata of WaBhingten, County of Spokane, known as Marning$ide, the inftial Phase of which ie known as Phase I, which .ie more Pazticulsrly deacribed on Exhibl.L "AN attached hereto and incorgorak.ed herQin. THIS 1ST AMENOMENT amends the Declaration of Govenants, Canditions and Restrictiona vf Morningeide, recorded October 3Ist, 3994 under recording 09410310022, volume 1666, which reads a8 fol.lowo s - Sectiran 5; Lot shell mean and refer to arty plot of land ahown upon any recorded subdivieion map of the PropeXties. • is hereby amended to reati ns tollawe: S_ esg-t ion 5. Lot shall mean and refer to any plot of lnnd ehown upon any recorded eubdivisian map of the Propertiee, apecificall,y excludEng therefrom any propertiea desar.ibed in section 4 of the abav@ referenced Deelarati.on, including but not . limited Go Tract2 "A", •'a", »C«, AND "E" ; deecribed there.in, unle~ia any of said property • desGribeci in said Secti4n A ehall ever becvme used f,Qr residentisl purpogQa, di~ for purpoaee other than thoae deacribed 3n Section 4 or uses apecitically xelated thereto. Tn the event any said propertiee are eubsequantly • Used for re$iciantial or other purpaeee, Lhey ehall fmmediakelY becvme aubjact to the I?ec3eration sa any other Lot in the aubdivi.sion. . It ia anticipated that Track E will be puzchased by Vera Irrigation Dis,trl,Ct No. 15 i for a w4Cer gtoraga tnn?c 2ocakicn, nnd Bo ldng as Tzect L•' le held by Vara Tr'rigatien Dintzict No. 15, itie euacaesvra atid aeei4ne, fox auch a use, Tract S ahall not be subject to tiheee , covenanta, condition$ and reetictiacls. ' ; IN WITNESS WHERZOr the undozsignpd, being the Declarant herein, have hereunto eet f.ts hand and eea2 tihis o7 day of DeCembQrr, 1994. ' U11HM DEVELOPMENT, ZNC. ~ . BY• • RiCJIARD T. DAEiM, It's Preeident . . : 3h2z r, o'G 609 t~10' ?~3(1 I`8 -1-lOZlZ1t~J 3h1I 1SNS c t~ ti Sb6 Z-~ t-hJrJr b0~~0'd ~ ru -d It11Ul .a • • ~ ' • 1 . . . ' , ~ , _ • . . ' . . ♦ • ' . . . , ' ~ q. . ~ v • ' ' . ' • ' ; • . 9TATL OF WASHINGT4N ) vot.1G85pncE 722 County of Spokane ~ On this s7 day of Oecember, 1994, before ute, fihe under$igned, a Notary pubiic in and for the Stata of Washington, du3y cammiseioneci and eworn, persAnally appeQred Richard T. Dahtn, to me known to be the Preeident ot Dahm DeveZopment, Irsc., that executied the faregoing instrume»t, and acknowledged the eaid instrume,it to be the free and voluntary act and deed of aaid corporation, for tha uaea and purpoeea therein mentioned, and on oath stated that he is authorized to execUtg tiha eaid in8trumant. GTVLN Under my hand And official aeal the day end year laot $bove written. r' . / ~ . • : : ( ~e -•"a:y~~• ~ r/. r / Cc*L. u-L/ . : y' ,,U f ~ N ' : ' %~dlJ.~. •+Y '.%~"•4/S ~'%r;C`' ~ . v.~~r ~L- Notaxy Public Yn and For The 5tate ~'~G' of Washington, Reeiding t Spokane k~' i~ G+~o`~'% l(;1, ;:I, MY APPQintment Expires t . C<~/~ ; . ~ , ~ , , • . • . t7o/b0 'ri Sb2Z 87-6 5OS NOSd30I'~ -170N8H3 3N I 1Sdfi Zt7:2T S66t-QZ-Ndf . ~ ~ y s l). O it A N' I7= ~ . ~ . C O [._.1 N "I° y OFFICE OF TIIE COUN'IY CNCINEER • A UIVISIQN Ol= TI IG I't1131.IC WORKS DEI'ARITIENT Ronald C. Ilormann, 1'.L., County Cngitieer Caentiis M. Scolt, I'.C., Iairector AGRCEMCNT TO PAY rErS ENCINEER'S ACRCEMrN'T NUMI3ER 4~ ~ Tltis agreement taetween Srokatie Ccaunty and Y~-,~• (name ot pcrson ) wliose interest in Ihe project is C~~ ' IN.,A (i.e. owner, agcni, eic.) -i is enterecl into this day of 19 9 TI►is agreetnent is aprlicahle to the project knQwn as: 9 1L t litojcc re sFul7Ycnan►c& fi c n mffcT Ttiat the inclivictuals ancl partics namecf herein as having ati interest in the above cicscribecJ rrorerty or project agrce to the following: l. Reimburse Spokane County for project review anci iiisreclion fees as sreciGecl in Charter 9.14 of tlie Sliokane County Cocle. The fees will b:, basecf on actual salary eosts incurreci hy Srokane Counly for project reviews ancl / ur insliections plus a ten percent aclministrative eliarge, ancl will lie biltecl rnontlily as acertieci. Any final Uilliiig amounts, to incluclc any late fecs or any otlier cxpcnscs incurrecl in tlle collection of an overcitie aecount must be paicl rrioc to tlie Couilty's acceptance of the project for filing. 2. The unclersibnecl agrces t1iat tliese fees are cfue and rayable uron reccipt of the billing as srecifieci above. 3. Arly invoiees not paic1 witliin 30 clays of tlie invoiee clate will be suhjeetecl to a late Fee citarge of l% pcr month (12°/a per year) on tlie unpaic1 halance of Ille account ancl aiiy acerued late fee cliarges. In aclclition, if any outstaticlinb balanee on tlie account for tliis project is not paid witliin 30 clays of tlic invoice ciate, tlo fiirther reviews oF tlie project clueiiineiits will be conclucleci until the entire account balanee is paicl. Any balance oii tlie accoutit far tliis project not paicl witllin 65 clays of tlle invoice clate may result in tegal actian or tlie initation of otltcr collec(ion pruccclures, iiiclucling rcferral to a collection agcncy. 17)e Sponsor will be liable fur any ancl all exlicnses iiiciirrccl by tlie County for the collectiati of overclue accounts. 4. The montlily billing sliotilcJ be scnt to the attention of: . NAME: ADDIZCSS: 1Z co 3 p CIT'Y, STATE: Q t_-'T%..JN tJp-,~-` RECEIVED jPOKANE COJNTY Z1P CODE: 9 a 'r-~7 ~ ~ ~-EB 2 1995 PI 1 ON E-- # : 9 4 -~k ILDlNG . y . I unclerstancl tliat failure tc~ ray thesc fees may resuit in clciay ii~ con~~~leiion or approv<< a' the project or otlier rossible sanctions. /J~j If this fee t-kgrcenient is coiiipletccl by someone other tlian tlie Sponsor (i.e., tlte project owner or a principal in the: firm sponsoring Ilie project), suclt as the Etigineer clesl6nljlg tlie rrc~ject, then writlen autliorization from the Sponsc7r speeifieully ntitlioriziiig llic A6ciit lo exectite this ree Abreenieiit is ltlacliecl to tliis Fee A6rce~»ent. SICNATiJItF , (1'RIN"I~ NAMr) ItETl.1RN YELLOW Cnt'Y 'I'O SI''(.)KANE COUN'!'Y LNGINELRS k\I)V1agrccmcn fcc 8/20/93 . 7, W. 1026 13roachvay Ave. Spakane, WA 99260-01711 (511~.)~4~56~i~GQO-'~~f AX'~(50'9j '9~56-4715 N'OTICE Ofcl r-ANSMfTf-l"Al-i i3US[NESS NAMC: ~ I'nRCCL NO./LEGnL U E(~A nr~SC[iIr~TIorr: PnOI'OSCD USE: GQocno C ~ ~ -c:~-mm P ► p E- ~o 4/~5- CONTACT: PHONE: Iv1 L I< P~:- Pn vi E, Ll_. REASON FOR TRANSMZ'z"rAZ, PREAPPLICATION COIdFERENCE PRECONS'iRUCTION CONFERENCE . OTHER: ~ DATE: TIME: . ~ F Y.--L DOCLTiVzEKTS C]RCYJLATEn DISTRtBUTED T0: ~ RECD DESCR[PTION BU(I.DINGS PLANNING F.AIG[NEER,S NEALTN SCAPCA FQtE DIS'C /j OTKER: ~ ISite Plan (new) Q'ev se X I I~ ICritical Materials List _ ~ ~~,~~,i ~~~~~~a~ . . . ( Parking Plan. ~s • . iSignage Plan IL.ishting Platl P s ' Drainagc Plan w•~• ~(<v`l' • • A`\4ibC'pGv , atz<•<~-=: cMf,d.~ 3d~lr . . , lDrainagc Calculations , - - a ~ . w>~. ~>~~,~ti»s~,,r:s;.'+~.~~~~i~~~~~ '.,.r.~+i~~~.. ~ >4^+,~ ~..b Z~> ~ ♦ ~ • . ~r. • ~f ~Qj~ifw~ { (Agreemcnt to Pay Fccs ~ lIcrigation P[an L ! ~6 I Landscape Plan I ~ I( Procnissory Lettec 3~3~~ s~ (La.ndsca!'e Cost Estimatc~~~ ~ ~ ~ • •~.~A~~~~~~(~~'~~~~~~~~~~~ ITcaffic Circulation Plan ~ I I 1. IN~~~~ IConstcuction Drawings ,,~m o- r- ~ IFloor Plan L-e -a.prs 1 I 1 x I I I I . I r r-,,,,, q, eI Thc nfiovc i(cros havc bcctr rccci vcd: 03 1995 . RC IC COOfC~I(1AlOf: ~tC qOf ~pu-t ~SPOKAWE vW DU~iTY EN61 iV L o ~~~E ~:OUC.~ ~JI U PR0,1ECI o~~_ . c~~~,~~:<<c~~ SUBMII°TAL # RETUi~~~~ ~~+*,a I 14iN Li4'C'AINEER " ' • . - •~~1 • i•,~r~~,r•,~, r~.'i` . . ~ - , . , . . . . ~ - - ~ . . . . . . . . . • . . . . : :PRE-AT'I?~:ICAr,rON:::::::~::~:~:::,~~~~-~;:=~ : . ~R~_C~ONSTRUC:TION - - . . . ~ _D_____♦ ~ _ . ~ . .DA"TL;. -.~IME ~ ~ . . . - . . - . . . . _ . . . . . . . . . . . ~ . 'F,.. . - . . . : . . , . . . . . . . B~CJDIN ~ . . . F?~A►~TIN:Cr-::>:.::.: . EERS-~ ~:ENCxZ1~I ~Ar.;TH: . . . . . . - . . , ~ . . - . . . - - . . . . ~ : . . . . . . . . . `G . . . . . r . . . CI FIR I T:..~ E D S T , . • r.. "J,~ ~ . . . . . _ ~ • 'S:: . ' ' . :h. a . _ ~ a~ . . . . . . . ' " y. : • . . . . . ..:i::. . . . . . . . L ADDRESS: . ~ , - O VJN E R:J_o~ PHONE : ADDRESS: ~ BUSINESS NAME: ~ . ~ . , CONTACT. V6 2 PHONE. ~ ti~, ADDRESS: , LEGAL DESCRIPTION: PA.RCEL NUMBER: DETAILED PROJECT DESCRrPTION: . e-. L J_ - ~ lo~_ ~---L C,44j, ALUE . . . . r>.r -.:~:.:::::~F: . . . . . . . . : . - . ~ . ~ .v . . . . . . _ .:>:>:.:~::.r: . . . r..---:........ . ::v::~~:.:_.:::. -.r..:::.•:•:::; :s+~. ._»fy . . . - • ; y . . .r..........:.: •..4............... ::::::::::s••~~:: _ _ , . . 3:.f~::::::5>:y . . . . .1.; : :::•x::::::::::.....:• - COMMENTS . . t.. ~ . ~ . . o-.: . . . ; . . ~ .....iX i>`.:: ~ ' . ti f 5}itti ~•.tit..... ' ' ' - ' {ti . . . . . . . ~ , ~v :y: } i: . . : Y.. . x:. . . . ASl. ..~i ! i .~l'4 i.. .:•l f•: fe° - k~ . •"s: •:?~i?. : {-:.G ~ . . . . . . . . . ...._~~~f: • ' i~r:. - . , . : . • - - - • . ~ :.ti.J;.....}.~ _ ~r~~ •{i. ' . . . . . . . . ....ti:.......:::: . . . . . . - . . . ( . . . . . . _ . . _ . . . . . . . _^f•iY: ~ti~ . ..,-..,t; . • }i:. - _ . . ~~~.~I... ..~?.f1..~r.:......;....:......:. . . . :IL. ii~~M1}fTS~.l.~:.:Y%S~::tit. 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SERVICES C4whmle - Cl~ec~rtlle • (:dremsrlvlr • 'Cri-611ies • 'Zvr/hrad - .O - , , v • , . , BOVAY NORTHWEST INC. " A ' • • ' A SUHSIUlAC2Y OF DA~1ES BL MOORE 808 East Sprague Avenue i NORTHWEST Spokane, Washington 99202-2189 y A cuy`Q1A0_ ' - , (509) 838-4111 OAMFS !L MC7QRr ' , . _ . Fax: (509) 747-8537 r . ~ - - March 31, 1995 . Mr. Dean Franz Spokane County Engineers Office 1026 W. Broadway Ave: , . , . Spokane, WA. 99260-0170 RE: _ Pre-Construction Comments for 900000 ' , . Gallon Standpipe - 2322 S. Dusk- Lane. _ _ Bovay Project No. 1060-571 - - ' y - - - Dear Mr. Fxanz: , . _ This letter addresses the written comments prepared for the referenced project by'Spokane County Engineering and Roads Department and given_ to Bovay Northwest at'the pre- < ' construction conference on March 20, 1995. - , ' . , . 1. Integrate design of standpipe overflow~ system with all elements of the subdivision runoff system., Plan sheets from the subdivision project are included with this . comment sheet. - - - ~ , - - - , The attached revised site plan (Plan sheet 9-C-1) and details (Plan sheet 9-C-3) , ' show the new location arid profile for the 10-inch PVC drain line and the 10- - inch ductile iron overflow line. The, above-mentioned lines and drywell have been coordinated with the final location of,Pond No. 8 of the Morningside ' r • Phase I. addition., ' . , ; , - 2. Submit calculations showing that the volume of the pond is adequate to contain the overflow based on the condition.s outlined in the Spokane County's "Water , Tank Overflow - Requirements. " Morningside P:U.D. Phase I, Pond No. 8 does not have the volume to contain , . the pump capacity (800 gpm) for a period of eight hours. Therefore, Vera ; Water & Power devised an emergency response plan for the 900,000 gallon - standpipe. Multiple copies of the "Vera Water & Power 900,000 Gallon Standpipe Emergency Response Plan" were submitted to the Spokane County Building Department personnel on February 22, 1_995. The Plan outlines the . redundant devices (level transmitters, float switches, etc..) to be instal_led in the standpipe and/or valve vault which will constantly update the control, center as , , - , . , , , ~ . Mr. Dean Franz , -2-' March 31. 1995 to the status of the-pumps. The control center will then take the appropriate . actions to insure proper'standpipe water level at all times. The plan should be available _for your review at the'permit center central file for this project if it . has not 'already been disbursed to your office. . 3. Submit calculations showing that the 10" PVC overflow pipe will be adequate to convey the overflow to the pond. - _ ' . . _ . . The standpipe and site drainage system consists of two 10-inch pipes: A. Overflow/drai n from the standpipe to the area r,etention pond : . B. From an inlet that col'lects site drainage to the area retention pond. , • , . _ , _ - , ANALYSIS: ,-Attached is an analysis of the capacity of both drains(Attachment A). The analysis results are summarized below: . - , - , ' A. Overflow/drain ; This pipe was analyzed for both open channel and full pipe flow. The open channel flow analysis indicates the system probably would not flow full except where the Pond,water surface elevation is above theoutlet pipe'invert elevation, but flow conditions could be c.lose to full pipe flow. See Open Channel- Uniform Flow analysis attachment A: . Normal tank drainage is controlled by a valve, and the drainage flow rate can . be limited. ' The, worst condition is 'if a pump fails to shut down at fulltank,', -and water is overflowed at the pump rate. Under full pipe flow condition, the calculated water surface elevation in the drain would 235 feet below the tank overflow weir. . This analysis indicates that the 10-inch diameter drain is more than adequate for the expected flow conditions. See Full Pipe Flow analysis attachment A. , B. Site Drain: This,drain was analyses for full pipe flow ;conditions when the , Pond water surface was at maximum design ]evel and the inlet water surface was at the top of the inlet swale. , . ~ . -___The 10-inch diameter drai.n.-is more than adequate to convey the site runoff - from the 100 year storm although the analysis is for only the 10 year storm. . ~ . . , _ - . - , - . . ; . - - . , . Mr. Dean Franz -3- - , March 31, 1995 . , - . See analysis 2) included unde'r the attached Full Pipe Analysis. 4. Fulf'ill all other requirements listed on the handout: • r The, actions taken on prior and subsequent comments fulfill the overflow requirements. ' . . ' 5. ~ Submit soil information demonstrati.ng that the drywell will perform as specified. The purpose of the drywell is to act as a temporary sump for the valve vault. . ~ There is the potential for a small amount of residual water to be .left in the lines ' after the water to the standpipe is shut down. , During maintenance' of the , valves and/or piping in the__valve vault this water may be drained on to the ` floor of the valve vault. The-floor drain and the drywell provide an exit for the water from the _valve vault, so the Vera Water & Power personnel performing the maintenance will not have to stand in water while performing their perspective dudes. It is anticipated that the residua,l water lef.t in the lines will be less than five gallons. - . ' 6. Submit copies of all the do'wnstream overflow easements. . The attached overflow easement (Attachment B) was . granted by -the Morningside Home Owners Association to Vera Water & Power to use Pond No. 8 as a standpipe overflow facility: ' Additional easements downstream were not 'obtained, because no overflow ;water is anticipated to leave Pond No. 8. The attached infiltration calculation - for'Pond No. 8(Attachment C) show the outflow from the pond v,ia infiltration is approximately 855 gpm. During an overflow event approximately 800 -gpm ' ~ would flow into the pond. , The high water level in the standpipe is, approximately elevation 2473. The standpipe, overflow is approximately elevation 2475. When the water level , reaches elevation 2473 the redundant pressure transmitters send a signal to the pumphouse to shut off the pumps, then 'they send a signa] to the mai n control center at the offices of Vera Water & Power as to the status of the pumps. : The'attached calculation (Attachment D) shows there is- approximately 18,800 gallons of extra storage between the- high water elevation and overflow : elevation. At the 800 gpm fil_l rate, there is approximately 23 minutes from the ' , . time Vera Water & Power receives the first signal that the hi_gh water mark has , been reached until the water reaches the overflo.w level. ° , . - _ , • - . , - . . , Mr. Dean Franz . ' - -4- , March 31, 1995 ; Six inches above the established high water e.levation there -will be redundant ' :float switches ( approximate' elevation 2473.5).that wil.l send a- second signal . to shutofF the pumps and notify the control center, that there- is a potential - overflow about to occur. At this point - there, is approximately 14,100 gal_lons , of storage- capacity until the overflow elevation is reached. '.-At the 800 gpm. fill , . , rate there is approximately 17 minutes from the second signal until an overflow . - occurs : , . Vera Water & Power maintains a 24 hour-monitor on their system and has the capability to -shut off any of their pumps from the control` center via their telemetry system. In the event that all of the redundant pump shut off devices , - (pressure transmitters and float switehes) fail simultaneously, and the pump , . does not sh ut off, ` a Vera Water & Power representatiye, with access to the pumphouse and_ the ability to shutoff the pump, can be on-site and have the pump shut off withi.n 15 minutes. ' - , , , If you have any further questions, please call me at (509) 838-4111. ~ - ; , . , . . , , _ . . . , - Sincerely, . , . , Michael-K. Powell _ . . Attachments cc:. Kevin Wells,'Vera Water & Power . Larry Biggs, Bovay Northwest , - . , ~ , ~ • _ , , ' ' - , ' • " _ . . 1 ^ N:\106015711L\142 . ' . ' . ' . . , , , _ • ' , , . T ATTACHMENT A Overflow and Site Drainage Fipe Capacity Analysis ^ ~ . Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Uniform flow Worksheet Name: Vera Standpipe ~-~~.a -C,~ ~ Comment :(I2J'-~drain analysis : open channel flow Solve For Actual Depth Given Input Data: Diameter.......... 0.83 ft Slope 0.0070 ft/ft Manning's n....... 0.013 Discharge......... 1.80 cfs Computed Results: Depth 0.67 ft Velocity.......... 3.82 fps Flow Area......... 0.47 sf Critical Depth.... 0.60 ft Critical Slope.... 0.0090 ft/ft Percent Full...... 81.29 t Full Capacity..... 1.81 cfs QMAX C.94D........ 1.95 cfs Froude Number..... 0.79 (flow is Subcritical) ~,'~.l"a..t'•~.lr ~ wAs y''~, ~ ~ y r~ z •m ; 6 ~O 10139 ss FGISTEP~ . ip~vA~ ~ 195- EXPIRES Open Channel Flow Module, Version 3.12 (c) 1990 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 ~ • • 6 VERA WATER AND POWER 900,000 GAL. STAND PIPE . DRAINAGE S STEM CAPACIT ANAL SIS Bovay Northwest, inc. By: H. R. Gordon, P.E. SCOPE: Analy e the diameter of the following two drainage systems: (assume full pipe flow and the pond is at design water surtace elev.) 1) Stand Pipe Drain 2) Site drain 1) STANDPIPE DRAIN: A) Characteristics Flow, Q: = 800 gpm, 1.8 cfs, pump capacity Diameter, D; = 10 inch nominal Length,L; = 620 ft. to top of overlow Elevations; A) Inlet; = 2576.5 Top of stand pipe overtlow B) Outlet; = 2341.0 Max. water surface at Pond Total head, H: = 235.5 ft. Vel., V, (Q/(3.14*D ^ 2/4) = 3.27 fps. Vel. Head, h, V^ 2/(2*g) = 0.17 ft. N Reynolds No. (V*D*p/u) = 221,003 p, density: = 1.94 slug/ft. ^ 3 u, Viscosity: = 2.4E-05 Ib-sec/ft. ^ 2 Surface Roughness, e,; = 0.0120 e/d = 0.0012 f, friction factor,: = 0.02 for e/d =.0012 & N= 221,003 B) Required Head above Pond design water surface, H: Trial pipe length, TPL: = 150 ft. H= 0.5*h +(f*L/D)*h + 1.0*h = . 0.8 ft. 0.5* h= entrance loss, 1.0*h = exit loss h = vel. head, ft. . Pond water suface elev, PWS: = 2,341.0 ft. (Design) Water surface elev. @ max. overflow rate: = 2,341.8 ft. (2,341.0 + 6.7) Actual pipe length to develop head loss: = 150 ft., O.K. = Trial Pipe Leng. C) Maximum drain capacity: H=(0.5 + f*L/D +1)*V ^ 2/(2/g) O R Q G> > Available Head: Overflow - Pond water surface el. = 235.5 ~ oF w 235.5 = 0.5 + .02*500/(10/12))*V ^ 2/(2*g) ~ y V^ 2 = 925.9 ft^ 2/sec ^ 2 ; V = 30.4 fps Q = 16.6 cfs O.K.: >1.8 cfs pump capacity O s ~GISTEP~~ G,\`.s CONCLUSION: 10" stand pipe drain is adequately sized. AL g~~~9►~ • EXPI4ES ; c:\1060-568\DRN EL.WQ2 PAGE 1 31-Mar-95 I , VERA WATER AND POWER 900,000 GAL. STAND PIPE DRAINAGE S STEM CAPACIT ANAL SIS Bovay Northwest, Inc. By: H. R. Gordon, P.E. SCOPE: Analy e the diameter of the following two drainage systems: (assume full pipe flow and the pond is at design water surface elev.) 1) Stand Pipe Drain 2) Site drain 2) SITE DRAIN Flow: = 0.5 cfs; 10 yr. storm Diameter: = 10 in. Length: = 226 ft. Elevations: A) Inlet: = 2346.5 Top of inlet swale B) Outlet: = 2341.0 Pond design max. water surface Available Head: = 5.5 ft. Maximum drain capacity: H=(1.5 + f*L/D +1) *(V ^ 2/(2/g)) Try f = 0.02 0.02 V^ 2 = 2*g*H/((1.5 + f*L/D + 1) V^ 2 = 2*32.2*5.5/(1.5 + 0.02*226/(10/12) + 1.0) V^2 = 39.7 ft^ 2/sec^ 2 V = 6.3 fps Q = 3.4 cfs O.K.: greater than 0.5 cfs design flow N Reynolds No. (V*D*p/u) = 425,265 p, density: = 1.94 slug/ft. ^ 3 u, Viscosity: = 2.4E-05 Ib-sec/ft. ^ 2 Surface Roughness, e,; = 0.012 e/d = 0.0012 f, friction factor,: = 0.02 for e/d =.0012 & N= 425,265 O.K., as assumed , CONCLUSION: 10" site drain Is adequately sized. p R. (3Q oF w.asN~'~~ ~ O~ 10139 s ' ~ s `GJS Ttp v ' ~61AL EXFIRES~ 9,51 c:\1060-568\DRN EL.WQ2 PAGE 2 31-Mar-95 ri tf M r Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Unif orm f low Worksheet Name: Vera Standpipe Comment: 12" drain analysis: open channel flow Solve For Actual Depth Given Input Data: Diameter.......... 1.00 ft Slope 0.0030 ft/ft Manning's n....... 0.013 Discharge......... 1.80 cfs Computed Results: Depth 0.76 ft Velocity.......... 2.82 fps Flow Area......... 0.64 sf Critical Depth.... 0.57 ft Critical Slope.... 0.0066 ft/ft Percent Full...... 75.75 k Full Capacity..... 1.95 cfs QMAX @.94D........ 2.10 cfs Froude Number..... 0.58 (flow is Subcritical) ~GOr~ oF w,as,y,,y, 4 ~V CO ~ . i ' t ~ p 10139 ~~C`ss FGlSTE /pvAL~ EXPIRES Open Channel Flow Module, Version 3.12 (c) 1990 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 _ - ATTACHMENT B Uverflow Easement o a o ERF w AG ~ ~ Arrn BAsEMENr KNOW ALL MEN BY TSFSE PBF.SENT, for mutual consideration this agreement and conveyance of easements is made and entered into bq and between Vera Irrigation District No. 15 (Vera), a statutory irrigation district of the State of Washington and the Morningside Homeowners Association (the Assoriation) and Dahm Development, Inc. (Dahm), a Washington Corporation. RECITAI.S: A. WHEREAS, the Morningside Homeowners Association is the owner of certain real property legally described as follows: Tract "A" of Mornin,gside Phase I, a Planned Unit Development, as per plat thereof recarded in Volume 22 of Plata, Pages 88 end 89; Situate in the County of Spokane, State of Washington. B. WHEREAS, Tract "A" is desired to be used for the conveyance and disposal of storm water and natural drauiage. C. WHER.EAS, Dahm is charged with the responsibility of constructing a drainage pond on this tract. D. WMftEAS, Vera is the owner of an adjacent tract (Tract "E") where a water storage reservoir will be constructed. NOW, Therefore, the parties oavenant, convey and agcee as foIlows: 1. Dahm will ccnstruct and install a drainage pond es required by Spokane County for the purposes of storm and natural drainage and for the purpose of collecting atorm water overflow, if any, from the Morningside subdivision. 2. Morningside Homeowners Association agrees to maintsin and operate the drainege facility as required to meet the requirements of the Spokane County drainage plan and related regRilation,s as they pertain to the Morningside subdivision. Vera shall pay all maintenance, repair and replacement of the retaining wall and fence. 3. Vera agrees to reimburse Dahm for the additional costs required to enlarge the drainage pond to accommodate the overflow requirements of the Vera water tank. Before construction hes begun, Vera agrees to pay for the retaining wall, the installation and cost of bentonite in the berm, the fence around the pond and all other cost increases attributable to Vera's use of the pond, as well as engineering and surveying for design and construction of the extra items needed due to Vera's use of the pond. ' 4. Morningside Homeowners Association, in consideration of mutual benefits, hereby grants and conveya the following easement to Vera Irrigation District No. 15; ~ An easement over, under and across the above named real property for the purpose of conveying and disposing of overflow water from the reservoir to be built on the adjacent property, including the right to construct, maintain and operate thereon such lines, drains, pools and easements for the purpose hereof, and including, but without limitation, the right of clearing brush and timber, and the right to entry upon said land and to erect, operate and permenently maintain thereon the usual fixtures and equipment required therefor; provided nevertheless, that nothing contained herein shall dirninish the duty of the Association to maintain the storm water drainage facility. 6. If the Association fails to maintain and operate the drainage facility in good working order, Vera may give written notice of such failure to the Association and if not corrected within the period of time indicated in said notice, Vera shall have the right to correct said maintenance failure at the expense of the .Association. 6. The easements granted herein shall run with the land. The benefits, provisions and obligations of this agreement shall be binding upon and inure to the benefit of the successors and assigns of the parties to this agreement. This agreement may not be modified except through a prior written amendment executed with the same formalities as the present agreement. 8. Vera agrees to indemnify and hold harmless Dahm and Morningside Homeowners Association from any and all damages, including legal fees, they may incur as a result of any tank leakage/overflow on Tract "A", any lot in Morningside or any adjoining (downstream) or affected property. , •,~.i IN wITNES31 ERE F, the undersigned have set theu hands and seals this ~y day of l)~ f~ V` 1 11995. VFRA GATION DISTRIGT NO. 15 . By its: General Maneger D DEVELOPMENT,INC. ~ . By its: President MO IDE Z IH VVNTR.S ASSpCIATION ~ By its: . ~ Y STATE OF WASHINGTON ) ) ss. County of Spokane ) On this day personally appeared before me RICHARD T. DAHM, to me known to be the President of DAEIM DE;VF.IAPN[EN'r, ING., the corporation that executed the foregoing instrument, and acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he alone was authorized to execute the sa.id instruiientl~ F~I~"~der my hand and of~icial seal thi.s ~'~Tay of March, 1995. *0 TA R y ~"v. . . . pUBLIG - otary Public in and forlhe State of : J'.,. •.,sFp ~g. 0. Washington, residing in -e' • /~c~ E►D~;T 01: a pAZj N j y C p m m i c.c i o n E x p i t e s: c[ cel- ; ~ WA 5~%%~ STA~` WASHINGTON ) ) ss. . COUNTY OF SPOR;ANE ) I certify that I know or have satisfactory evidence that RICH1LRD T. DA,ffiM is the person who appeared before me, and said person acknowledged that he signed this instrument, on oath stated that he was authorized to execute the instrument and acknowledged it as the authorized agent of Morningside Homeowners Association es the free and voluntaiy act of such as.sociation for the uses and purposes mentioned in this instrument. ',l ,'°i" ~~..:s:1Y995. ~ ;~!•Ua,'~ ~'.o~ % f , ~ ~ ~AoTARy No ~ublic in and6for the State of ~ n "1/ B L IC residing at ~ ; 4 ~ ;~.~'••.sF~, ~Z~~~ My Appointment Expires: '.,~1'~e• ' T 01:19~,. . iaVI ) ss. COUNTY OF I certify that I know or have satisfactory evidence that 1~e,v`L-h- G(J-2 telo the person who appeared before me, and said person acknowledged that 2(C signed this instrument, on oath stated that c.eauthorized to e ecute the instrument and acknowledged it as the 6e-1-7 e VR.f /)I2?2Q -1 of -k 11 '4 Y %kle-7 and voluntary act of auch party for the uses and purposes mentioned ''instrument. Dated:~~~~'~ . An No ublic in and for the State of . L , residing at ~ ~CZ~rt--~ My Appointment Expireb:~ , C N/JERP.Y/RBAL/LIAtlX/NSOVSRFLO.VgR/ 3128196 Attachment C Pond No. 8 Uutflow Due to Infiltration r , 1 ~ CUENT V"'('C*- w GDESCRIPTION I~n K) n O J Z'T l O-J ~ l?~_~ • i o~. t o.~1 O DESIGNED BY DATE O V A Y FILE NO. REVIEWED BY QATE Y SHEET ~ OF ' ~ T_-_-- : : - ~•~~--~~~-~lo~ c~,~ ~ A . - . . ~ . . _ - . . - ~ . Lk~___-{~_~~~-_ ^-as 5 V%,%.5-~-u ~ P d~- ~ JV1o~rti~ - - - . ~ c~- ` - . . r ~ . - C~ - - . . ca~ . ~d~t~~-~-~.~, t' l~~ S ~ ► ~.cY ~ _ a c. , C~•' G t~l~ ~--~c~..~ . _~1 S . ~~Sa-~ ' L-k 0^ - - - _ . _ - ~ _ - . . . _ _ _ . . . . - - - - ~ - • - . • - ~ - - - • - ~ - - - ~ --T~~►~.~~ __~r~-~. cof~~_ - - - - - - ~ ~ - - --Z:, ,4_ _.~rox~ ►~;q~- 100~~:-►~ ~ a=i~;~o~ ~_~~?.4~Z=~s~j- ~.~~:T-=__~ -----=-=.J- . - , - - ~ ~ ----i ' ~ ; ; . . ' ' ! , . ~ ' ~ _~~o~._KIK ~ ~o•-, s--~-~--w,~A ~~TG~,~I~_S ~ . . , , - - - , . ~ , . , , ~ - , . , - : ~o~ Ss~-~•4 ~~s ~ w, -~ro Lnn ; ~ Q • -~?J. w ~ lQ_G~.S _i'_ ~ ~ ' , S I 1 1 ~ ~~;',;i.• Ilt ~ 1~ ~ . _ 1 _ , ~ ~ , • ' ' ; _ ~ ~ ~ ~ . . ~ I ' ~ f i ! # ~ ~ ~ ~ ' ic, rv~a-►1~ . ' . ATTACHMENT D Standpipe Volume from High Water Elevation to Overflow Elevation .i ~ i ! CLIENT OESCRIPTION 'n,~ .1 ~ ~ B O V A Y DESIGNED BY DATE 9IS v FILE NO. REVIEWED BY DATE ' Y SHEET ~ OF z-- . vvlow^_ _wck~_ _ w.~-k.-----¢-~J~•~-LoA. _ -._---Z~.~'3~ ~r~su~. -~-~~•r.s~~~'-~ac~-~sa--~~~ - . . . - - . . - _ ~ ' _ - - - - - - - ~ ~ - - - - - - - - ~ _Z_ _a- , --A ~ ; - ~ l,o►~n~a.~. ov.sLr-t" ldt,J_ cV~.~c:,~~~, , S ~ '-~_l---- ~ fF ^ - ; --.-w ~.T-'_. _ _ _ ~ . ~ ~Vo1v»~-~ - - . _ _ . ~r-_ . . - - - - - - - - . . - - Z, - - - - - - . . - ~ - Z, ri--{-, - . L„aj - - - - - - - - . _ _ - ~ - - ~ - ~ - - - ~ ~ - - - - - - . - - - - - - . _ - ~ - _ . _ - - - _ A k. - - ~ - ~ - - - ~ - - - - - . . . - - - - _ • • _ _ - , 1 • ___•_•---y - - - - - - _ _ - - ~ • ~ , L - - - ' . ~ _ . ~ . .3 _ ►.41(0-_ ~ 1Z~~(~_._~~- ~ 13^.~Z~ ~ . , , , ' , i , • - ' ' I " . ; ' , C t~- T~~ _4s~ _ _ ~ - _ ~ - ; -i _ . - ~ , ~ , , ~ , ! ~ ~ , ~ ! ; ~ ~ j ; ' , ~ i . ~ , ~ ! ~ ~ , ~ ~ I ~ , i , , • I ~ . ~ i ~ 1 f ` ' ~ I • ~ j , ~ ; ~ ' , ~ k ~ ' ' ~ ~ ~ ~ ' ' I ~ i ~ ~ I ~ ' • ~ ` ~ 1 , ~ ' ~ i~E i;~ ~:i~ ; ~ r ~ ~ , • , ~ I ~ i ~ . ~ ~ ~ I , ~ ~ " ~ ~ ~ ~ ~ ' i ~ ~ t ~ ~ ~ ~ ~ , ~ 1 7 • ~ ~ ~ ~ ~ ~ I ~ ~ ~ ~ ' ~ , , ; , • 7- ~ ,~i~i~ EI ilkl°~' I ~ ~I~ El:~`~~ ~ ~ ~~`!'!~~~I II. I'~ ► , .~M~, G~;;. ,.I ~i~ ~;~I~i!+ ~~'E~' '~i i ~ ~ ' I I!.( i~' i~ ~ ~ i; ~ I ~ ~ t I 1 I i ; 1 ~ ~ ~ ~ ~ ( ~ i ' ~ ~ ; ' ~ ' ` ; ; I I ' ' • , ' I ; ~ i ~ , ! ~ ~ ~ ~ ! ~ ; ' ~ ~ ~ ~ ' . I r ~ ; ~ ' , ; , ~ ~ ~ ; . , t ~ ~ ( , , , ! I 1 ~ ~ i ~ I ~ ~ ~ • ~ j I CUENT DESCRIPTION ~ 1QI Jw.Q_ D~r~a~.JJ BOVA DESIGNED BY Y" ~iL~ ~o~-~• I DATE 0 FILE NO. REVIEWED BY DATE Y SHEET Z OF 21 - _ 5 ~ V w~II- . ~ ' "l . -Wc~~~._ ~MW' 1'~ ' ~ 1+~W'~ I O~_ _ . - . . . - - - ~ - - . - . ~.a,.LQ. _ - . . . . . . _ - ~ - . - aVAIr-~ 10~ .Z4-7~ " ~ zo' - - ~ - - - .t,T, Z, - • - r r1 _ _ vo- Va~u - - - - - = - V =:R k- - - - - r Zo~. ~►',,s - ~ 3_._ 14_I (c Z_S(o . (04 , ~ . - - - - - - . - _ _ o . - . . - -w. ~ - ; - : = ?s~ -----------Y-_`-- - - - , . - ~ _ . , r_ . a.i i-... . . - ; , , - . . . 4S1 c c s . . - - ~ _ ~ _ _T ----.-R 7 4 l o,. s - _ 5 y ' : 1 ~ ~ ~ • i ; ' ' i i ~i~ ~ ' ' , - I ' ' ~ ' ' • I • ~ ~ . ~ • ~ ' ' I . ' , . ' ~ - _ - ~ ~r ~ ' • ' ► ,L_._=e ~ ' ' f ~ 1 ~ ! ' ~ ' ~ ' ~ I ~ I , , : ~ ~ I ~ i • - , - ~ , - . . _ _ _..v. . _ e - - - - - - - - --1- - - - - - • _ . _ . _ . , . . r - . - ~ • - - - ~ , . ' ' r ~ i ~ ~ I ~ • ` ~ , ~ 1 ~ ~ I ' ~ ~ ~ ' ~ I ` ; ' ' • _ 7' i ' i I 1 , ~ , ~ , I ~ , ~ • ~ ~ ' 1 , ~ ~ ~ P 1 R ~ ~ I ~ . ~ 1 ! I f , ' ` I ~ ~ ~ ~ , I ~ ~ ' 1 ' ~ i ~ I I ~ ~I i • ' ~ ~ I • ' ~ ' 1 ~ t 1 I 1 1 ~ ~ - VER.A WATER & POWER 900,000 GALLON STANDPIPE EMERGENCY RESPONSE PLAN INTRODUCTION: The purpose of this section is to describe the Vera Water and Power emergency response plan. The emergency response plan describes the procedures that will take effect in the event of an overflow of the 900,000 gallon stand pipe. The emergency response plan has two main components : 1) Operating Controls (electrical and mechanical) to prevent an overflow from occurring. 2) Actions that will be taken, by Vera Water and Power personnel, in the event of an overflow. ODeratinia Controls: The operating controls are those electrical and mechanical devices that will be installed and used to monitor standpipe water level and transmit a signal to shut off the pumps and/or close the standpipe inflow valve priar to standpipe overflow. The standpipe water level will be measured with pressure transmitters in the valve vault. The redundant pressure transmitters sense pressure differentials and determine the water level in the standpipe. The pressure transmitters detect the water level and input a signal to the Vera SCADA (Supervisory, Control and Data Acquisition) RTU (Remote Terminal Unit) in the valve vault building. The booster pumps are startedlstopped based upon programmed signals received at the pump station RTU via the SCADA system. The redundant float activated switches installed in the standpipe at the high water operating level closes the standpipe input butterfly valve. Prior to standpipe over flow, this level is also inputted to the SCADA system to alert Vera Water and Power operations personnel. _ Following are the overflow prevention measures taken at the standpipe: l. Redundant standpipe pressure transmitters located in the standpipe valve vault. 2. The SCADA system is programmed such that both level signals are sensible . (within a defined tolerance) or pumps are turned off. _ 3. During a period of loss of SCADA system transmission to either standpipe RTU or booster pump station, the RTU defaults to pump's OFF. 4. Redundant float switches sensing water level greater than high operating water level, but less than overflow, close input pipe butterfly valve and send overflow level alarm to SCADA system. 5. The loss of power at standpipe closes the input pipe butterfly valve. In addition, the valve actuator/operator is spring loaded fail safe to close. Vera Water and Power Emergencv Resnonse: ~t The SCADA system sends a signal to the main operation center computer where the entire Vera water and Power water system is monitored. When the pumps that control the water input into the standpipe shutoff, the computer monitor at the operations center receives a signal via the SCADA that sets off an alarm. The alarm alerts the operation personnel to the fact that the standpipe is full and the pumps are operating as designed. If the pumps do not shut off and the pumps continue to fill the standpipe, a second alarm is set off at the operation center. At this point Vera Water and Power operation personnel manually shut the pump off at the operation center. Vera water and power has operations personnel on call to handle emergencies 24 hours a day. The on call operations personnel can be contacted by pagers and/or phone when there is an emergency. If an emergency occurs these personnel have the capabilities to shut the pumps off at the main offices of Vera Water and Power or to shut the pumps off at the pumping station. During hours other than the standard business hours, the phones switch over to the emergency number. The emergency phone number is monitored by personnel that contact the operations personnel in case of an emergency. N:\1060\571\M\108 VERA WATER AMD POWER NEW WATER SUPPLY STANDPIPE , Calculate runoff from drainage basin. Volume of runoff for the first 1/2 inch.of precipitation from ` impervious areas is calculated to determine infiltration volumes required. This is in accordance with Spokane County stormwater guidelines. Peak runoff for the 10 year and 100 year design storms are calculated for the entire area of each drainage basin. The 10 year design storm is used to size on-site drainage structures. DRAINAGE BASIN Step 1: Calculate total area and combined "C" value. Area (Lc) "C" Value Impervious Area A J:= 0.11 C I:= 0.9 Pervious Area A p:= 0.22 C p:= 0.25 Area:=AltAp AI•CI+AP'CP Total Area ~ ~ Area Arex Area = 0.33 Acres , C c - 0.47 ^~a, Step 2: Calculate volume of runoff ( first 1/2 inch of rain). Vol I : = A I-43560• 0-5 12 Val I = 200 CF 2543i 4..: Step 3 Calculate Swale Area Required Depth 6 iriches f ~f4NAL - / I o?~ ~ S Area Vol swale ~Depth' Area swale - 399 sf ~ ExPtAEs ~rjs, ~ 12 s Step 4 Calculate peak rate of runoff for 10 and 100 year design storm using rational method (Q= CiA). Note: time of concentration calculations are separate. Tc = 5 minutes 1100 5.1 ~ 10 •=3.2 i ~u Q 10 C c'1 10'A1ea Q 100 C c'1 100'Area Q 10 -0.49 cfs Q 100 -0.79 cfs VERA. MCD 1 1/24/95 RECEIVED SPOKANE COUNTY FEB 2 21995 p~ UILDING ~ . 1~ , , • • : ~ ~1' ~r• ` ' f ^ ~ ~ ~ y~•4• ' /,,I',~l" S~ ~rP ~ ' . ' ~ ~ a ~y_~ k' ; r'~ 1 ~ j ~ tr.~ k~ifl~~~ ~ I ~ ~ ~5. ~ ~ ',O~ ~r~► ,p,~o~,'~'" . l , , . 4 ~ ~ ~ ° . I . 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