The URL can be used to link to this page

28059 PE-1751A Midilome 2nd Addition 1998, 10-23 Stormwater Drainage Report ` . . •T .~s%. airr'asti . , , , • , J _ - a . . - . : y ° ' _ - oT , ~r- STORMYY A1 t.R .V RAfNAL.TE REPLJR1 and Roadway Design MIDILOME EAST 2nd ADDITION actober 23; 1998 Prepared by-, ~ Simpson Engineers, inc. . North 909 Arganne [:Qad Spokane, Washington 99212 Thc design ianprouemeuts shown in €his set af pians conFarm #a the applicabie editions of the Spokane County standards for fi raad and sewer consCructian and Spokane Caurity guideiines for ~ starsnwater mariagenent. AlZ desagn deviatians hzVe been approved by the Spakane Coanty Engineer. Tapprave thcse ; pfans for construGtivn . TABLE dF CONTEN7'S ~ . 1. DTalT~~~~ SumR1ary ' H. *Typical Curb Inlet a.nd Driveway Cut Calculations {additional caFculatians with Basins} * Stormwater Drainage Calctilafions for Midilome East ?nd Additiorr: Basins A through M. 11I. Attachments: 'N w.~'~''~'~c., * S.G. S. soi1s rnap, and soil description C,A ~ * RQadW$`! SLITfaCIn~ DeSPiz? $.`31aht lii5ta3'ice i►s3r.~lj+ses and fViapS tor - V~rc~er I]riv~, 35t1~ t~~~enLie, ~id 36tii Aventze je28~7a G~ l S`C~~`.YAL ~ EXP 0A-t~ I OW-24>00 ~ ~ W Stormwater T)rainage Report- Nf'idilome Eas# 2nd Additian : - ~ DRAIVAGE SUNS4ARY i This praject is Iacated sauah af 32nd Avenue and east of Pines Road. The plat propvses 37 residential lvts totalirag aFPrvximately 17 acres. The developrnent is divided intv thirteen (13) basins; A through M. See Drainage Map for Midilome East 2nd Addition. Each taasin is compased of two subareas; 1}grass lawins and swales, and 2} impervious resvfs, daiVeways, and asphaifi paVed streets. Stvrmwater flaws vverland acrass roafs, grass lawns, and dnivevvays and into grass swales behind the street cua-bs. Storrnwater frarn asphalt streets flows along the curb gutEers and inta the grass swales t'hrraugh driveway curb cuts and curb opera%ngs located at low points in the curb prafiIe. As specified in the "Guideiines for Stormwater Management", page 5-4; WhEIe a 5I{?p1rig SWFiIe i9 Iess thari 1o0 feet lvng, and slopes 1°Io ❑r less, the swale may be considered flat. Driveways alang the rflad vvill obstruct the swales, creating a series of indavidual stivales that are gess than 100 feet long and less than 1 D°Ia, and 6 inches deep between the driveways. `Pherefvre, e.ach swale wili be cansidered as flat. Starnnwater wiII fi11 each swale tv a 5 inch degth a.nd then vVerIlow acrvss each driVeway untH the water reaches the final swa1e and drywefl(s). The grass swales were calcuiated to hvld the first 112" of rainffall runvff vver the asphait street areas. Figure 2, page 6-3, of the "Crraidelines for Stormwater Managernent", by 5pvicane Cvunty Engineers, was used for rainfal intensity and duration oceurring at a Y D-year storm firequency. The Rational and B4wstring Meth4ds vvere used to calcuiate the peak starmwater runvff for each basin, and the type and number of drywelis needed for each basin based on the stvrage capacity of the swaIe In accordance with "Sal Survey, Spokane County, Washington°, 1968, the sails at the site are categvrized a.s' Gm6, Garrisan very graveUy loam,... simiIar tn Ganisvn gravefly lvarn, except that the svrface layer is very gravelly. SxB, Springdale graveily sandy Ioam, deeg, simiiar to SpringdaIe graveIly loam, except that the depth tv gi'aVeI and cvarse sand is mvre than 36 inches. These types vf svfl are eonsidered acceptabie for drywell installativn per Section 44.1 raf "Cruidelines for Starmwater Management". ; Starmwater Drainage Report. Midilome East 2nd Addition CC]RB Z1+LET AND I]RIV'EWAY CUT CALCULATIDNS. 1} For eaeh basirY, calcutatians have been made far the curb inlet lvcated at a law point Each curb inlet lvcated at a lvw point is si2ed tv accept the flow vf stvrmwater from the cvntributing pavement subbasin. 2) In some cases, additional curb inlets are required vn ccantinuvus ,grades. For example, additivnal curb inlets wHi intercept the stormwater on continuous grades along VercPer J.3nVe, Runoff calculations have been made fflr the pavecnent area in these subbasins. - 3) T3riVeway cuts vn continuaus grades will intercept the stnrnnwater flow in each pavement subbasira prior to the curb inlet at the lavv pvint. A typical calculativn has been made for a driveway cut for the pavement in subhasin H4, since this subbasin has the largest paVement area of any subbasin in the plat, it will have the largest peak flaw vf any subbasini. A daiveway cut af 11.35 feet is required for this subbasin, but is less than the typical driveway cut of 24 feet. Since, the runofF will be Iess in aIl other pavernent subbasins, dnveway cuts for the other subbasins will be sufficiently vvide (24 ft.) to intercept the stormwater in the cvrresponding subbasins. Drivewav Onenina on Continuaus Crade, Example: Subbasin H4 a= 0 in. Flowline depression at opening y=(].0$ ft. Z7epth of flvw in nvrnial ,gti°kter iQ = 0 21 cfs Design discharge QafLa = 0.4185 Frarn Fig 16(a), page 6-39 "Spokane Caunty Guadelines for c]lolillY►LiL1riF 1'AGLLIKgW1L1V11419 L _ Q/(Qa/La) = 0.21j0.0185 = 11.35 ft. T3riveway Opening; 24 ft. widef 6 in, deep QTTC:AAY R4TIc7NAl. FflRMUf A HYf?RC3LQG'f QRA[AIAGE @ASIN ANALYSlS for 10 Y'EAR STORM EVEAIT pate: 9n3198 Proaeck Name: MidilQme East 2nd Addihvn Desigrs: kwm Proaect Numbes: 12838 rnsc Fe At venonaninU 2838-~ds Sge Locabore: N il2, S. 34, T25 PI., R;44 E W.M. 8asin iUams 111-14" Basin tiecnpfion. Vrginsa Road Raint af Corscenhmtinn° Orrveuway SIJSAREAS: lntensrtll-Ouraiton for 10-Yesr Storm Event pe.scnption Acres C A'C Time Time Inhervs[ty incrmnt lr€errnm Pavemerst 0.072 0.90 O.065 (min ) [sec•) (in.1hr) tA+1sa1 5.00 30000 3,18 5 300 3.1$ 10 600 2_24 15 900 1.77 2[] 1200 145 25 1500 121 30 1 800 1 04 Tatai Basin Area, acres = 0.4172 35 2100 ❑ 91 Compasge Runoff Coefficsgrst = 0900 40 2400 0 82 Com6iner! (Area * RunofF Coofficient) = 0,065 45 2700 0.74 50 3000 0.68 55 3300 O.64 fiU 3600 0.61 31ME flF C4iVCENTRAT1❑N Irrsinutesl. 65 3900 060 70 4ZL1a 0.58 rc (adedarrd Row) Tc (gutter Anw) 75 45M 056 8o 4800 4 53 Ct = 015 L2 = 155 ' 85 5100 0.52 Z1 = 36 90 5400 050 L9 (A) = 18 Z2 = 0.167 95 SI(IQ 0.49 N(A) a 0(]16 B= a 1(]0 6000 0 48 5(A) = 00278 n= 0.016 6 = 0.Cit84 Tc(R) = 0 21 d = 0.087 Lt (9) = 0 TC {gtR.) 169 N(B) = f} Tc{A+B} 0.21 5(B) = ❑ TC hata6 5 f7D Intensity = 318 PEAK D15CHARGE, 10 YE►4R STORM: 7c (e) = 00 Hawirg 5.52 _ Q= C"I" A= 0.24 C.F.S. Q(es#imated @ d) = 0 21 c f s. Time of Cancentratusn = 500 mmuies H4 I7EPTS-11 aF FLQ y - FEET .01 .ox .03 04 es .cs as .in 2 J .3 .4 .S s .f .a 9 La 1.0 1 4 ~ -77~ -Ft 4 ' i yry ~---L -J- j 441 - ~-l I--, , f I~-~~ ~ I I E~ l I ~ - I ~ 1 I T .z oa La ~ , , ~ ~ , , ~ i d • / .05 1 M1 °a ~ 03 .ox ; ~ TTi I I o e I I i I r~i~l~i~~ill I I i ~ I I.4 I ; r i a ( +n ) [315CHlaRGE PER FQOT OF a/~L~ .s LENG-rH QF CURB oPENiNG INLETS WHEN CNTEftCEPT1IVG .a I00°a OF 'Cil1TTER FLQw 4 0 (b) r'ARTIAL INTERCEPTION Qm Ra-rio FoR iNLETS vF LENGTH LESS THAiV La ~ ,~j + ! ~ ~ 00, l r~`~ ~ ~ ~ 4 $ 1 4 S 6 B fA L,La CAPACITY OF Ci]RB OPEN1[VG INLETS vhC CONTIfVU0U5 GRA[]E 6-39 FIGiJRE 16 -~,1~?IL DMTG '~AS~ I~L~'~1~4~3R~L ~v. ►~$~8 l P1 IA, G~ CAL C l] L RTE vN5 .TOTAL A PAv-r. ~ 'vre+~cler '~rive. ~~+~a ~p 3~t 3z,~'~ 9j7.38 f+,?- D P. v4 s S ►^u 6.Z11~ ~+tr-c 5 kaoo F`t:, = ~ pvv fi v ~-LS 'FT,' ~ 4.3Z66 acr,~ ~9 18 z-2-19 F-r.a `1 114 . cs,~ ~0~+~ S~D►r~~~ ~ a~Z$ ~'TZ~ ~ ~~5 ~'S 3 12 tw If T. b~ Zorr4s$ri=r\5 + t 51n3'ke B~rr~k ~rywe4~ ( v.3 c-~s 0 u$~ STOgAGS P~+~~►~~E~: 385 5 4 5 f r.~ ~ 3 5 -7 { ~ - 12-838 - K, t4 M ~~►~~~,►~G~. ~~~.Gv~.~.~4~~s - ak SwA4F- R~ou«~v AN AtL AB L E ~ ft . 3 ~ ~ T. ~ 1.18S F~3 ~ A~ ►~'l = r,~~~ ~~.z C~~`~ ~ ~aa ~-~s~ ~ A Ir530 f'T., IF`C. (600.98 Fr.t) lza Fl, o ►~,5 ~~g`} = 7.~ 77- ~-T •3 1•°i8 F`Ty~ ~ lao F1.3 ~ lk~ ~ FT•~ G~ F~3 FT., -619 5 FT ~ 5~$ .F -r r [ ~`'114LL o {M'E C7F•A`I~1, P.~G~ Cp+~-Cl~ Lf~'~ 1D6~ 5 ~ . _ . _ - - - - - - - - - - - _ _ - ~IW - - - - - - - - - - _ ~ lv`._ - - - - r ~ s • --I ~.5' - - - - ~ ~ ~ ~3 ~ •1F~r,~ - r-I''014 ~Conc.. ~ oSr Y'~ cur ]cs - - ~w~le, ~3 v~tvw+ ~~r.-ta,CJ"oLI`_1reoL. .k5f_...~.~ctilYGllP - l~' ~ _ _ti-~- - - - - - W i + - - - - _ - - rr,~~r - - - - ~ }~b•~~l`~.~`!~ ~ ~ i~~~3~5~~3.~04~ - l.~~i3 FT~ ~ ~.2.9OD . aJ! ~ r`~-- - - - ' ~ !10 ~ - - ~i Op Df Drivewr~~ ~rf~.r.~~~-11A~,.~d1 A1V,r ~ ~i ri ffW C}.iD l(a~ ~ r'~. j tT. • ~ ' ti = "3 1 ~ • a ~1 ~7 F _ - - - ~ °r-ma ~ ~ / ~r _ _ - - - - ~j - p?-~' ~ C, oA c. . e- ~~oFe ~ _ . r - - v ~C3•~s 1.~.~ _ . cra55 - sL.Ctsonw` ec-, G~ SW 0.~e, 1• - • - _ ~ - 4~ . ~ ~ o , ~...a ~ • - • • ' + . 4.z.~1 2~ ~r~ o.,eTb _ _ ~ - - - - - • - - - • - - ~ ~ ~ ~rPF1j' ' ~ • • - • • • • _ • - • - - - " 3.1 5 • - _ . . . p... 0.• . . - - - ^a' aETEnmON eAscN oESicN: RaTIONAL FoRnnuu HYDRC~~OGY & aOvsrniNc METrroo pRAINAG£ BASIN AJdALYS#S fcr 10 YERR STQRM EVENT oate_ al1 aw Prajett Name Midilasnis East 2nd Addftn Job No• 12838 Rrvlect LxaLvn N tl2, 534, T 25 M., R. 44 E WM Designer K. MCiNL1LKIiJ Dreinage Basin Nama °A'. ❑isk Rir A9'Ihav+strrng i]rainage 8asih Descripfion ansrte - F2ename, 128383ds `208' Panding Rrea Mame, swate Far gom#ir►san Parsding Area Lccatvn west suie afi 4'ereter Qrne Point ot Cvncenlratian f aw Pt., 31+00. Li. guBAREpyg TIME GF COAfCENTFtATi[3N lTcl. rrsinutes DiestriPbon Attes C A'C t3verlarsd Flow Channai Fla4v [Maenffus '268"Aress- _Sggnrien€A. L2 = 380 ' Asphatt PavemerH 0.242 090 0 S81 Gi m 015 Zt = 73 Roais 0.000 0.90 4 000 L1 [A) = a Z.2 _ 86 prweways o.t 1a 0.90 0103 N(A) - 04 B$ a Grass Lmm 0321 {1 i5 0048 S(A) = 001 n= 0.03 Fc (A) = 000 s= 0009 Othar Aresa; d = [~.31 ~ S~tnest8 L1IBi = C? Te (ch ) 4Z3 N(B) = 0 Te(A+g) = 0 00 5(8) = 0 Tc total S.Oa Tc [B] _ 0.0 fMartsity = 118 TQtal Basin Area, acres ~ 0.547 Cornpasrte Runaff Coet~'iderrt = 053 Com6inec! (Area ' Runot6 Coeffiaiertt) ~ 0 342 Q{estrnated @ d1 a 109 t.f.5. Tima af Cancentration a 5.00 rnintt6es 1208' bRA[MAGE PRRAMETERS '2178" PaverrsentArea - 9228 sy S!. REAK 1315CHAR0E, 10 YF1kR STQRAiI '2W Vaiume Pra+nded _ 548 cu. it at 6' depfh 5tarm 5tarage Fronded = 548 au ft. at 8' depd, Q= C' I" A a 1.09 C.F.5. BOWSTR[NG C4LCLlLATIt7N5 ~ e5 A ib ib 41 NLIMBER and TYPE of DRYWECLS PRUPC]5EQ TirRS rme Irdertsdy Cl dev. V in V out Storage lncrmnt Imamnk 1 5mg1a-Barrel (Spakane Courity Type A) (min.) [sec ) (inlhr) (cfs) {cu ft} (ev. ft.) {cu. ft} 0 Doubla8arrel {Spalrane Caunty Type B} fas0r (A'G'#3 (wdf.'} :o Lz ~r s'-iFs aTi OM a'l Outtlaw Provided. 03 0 s 0 iuu 3"% fm 41 sti AT ip 600 2.24 077 537 180 357 15 900 177 060 608 270 938 20 1200 1.45 0 50 645 360 285 25 15051 1 29 041 662 450 212 '248' TREATMENT VCitUME 30 18M 1 64 0 36 678 540 136 35 2700 ❑ 91 4] 31 665 630 55 Required G.PA_ ponding voCume 40 2400 0 82 4.28 709 720 -19 Impesrnous '208i Area n 1P2' = 385 au. ft. +35 2700 0.74 025 709 810 -101 Vviurrta prvvidod Sf 6' depth - 548 cu. R 50 3[]00 068 8.23 721 900 -179 C1K? ss 33oo 064 0.22 744 so -zas so asao 0.61 0_21 772 1080 -308 ss asDa 060 ozi sai 1170 •349 70 4260 058 0.20 853 1260 -407 75 ~ uss 0.19 881 1350 -469 STf]F3M STOFL4GE VOLLlME 80 48M 0.53 0.18 8$8 1440 -552 85 5100 52 018 924 153E1 -608 Mammum sWrago requzre.+ = 357 cu. ft 90 5400 050 017 940 1620 -6w valcrme pravided at 8' dePth = 548 cu R 95 5700 049 0.17 972 1710 •738 OK! 100 6000 O.48 0,16 1001 1800 -353 Slmpsm Englnwsp fnc. 9l19 Nardr Argsnne Rasd. 5paksne, WA 992f2 (5M 9264322 Stormwater Drainage Report II. STO.RiVIWATER DRAINAGE CALGLTLATIONS• ~ ' $asin A Curb (]oenina at Low Point, Sta. 31+00, left, Vercier Drive l urb Uet #I h= 8 in. =0.67 ft. Total height of apening H = 0,055 ft, Dep#h Of water a# entrani4 -Q=0.07 cfs Tota1 peak rate of flow Q = 3.087{ZL,}(M32 far HIh < y, 0.065l0 67 = 0 097 < 1 i.. = Q - (3.0s7)p312 = O.07 = (1087)(0 065)311 = 1.37 ft. Construct Gurb Upening, 3 ft. wide, 8 in. deep i RATIaNAAL FORMULPt HYDROLOGY i pRAINA[3E BR51N ANALY5IS far itl vE4R STORM'EVENT _ Dafe: 9f15f58 Praject IVame' Middvme Eas3 2'td Adddian IDevgn kvrm Psojsd Numher, 12838 i Drsk Fln. ai ~mwnanl Mi 2838-xts Sde Locatiarr: N 1 R, S 34, T. 25 N., R44 E. W{N. Basin Name. "A 6asin Description• Veraler prrve Point o€ Concen#rabon Sta. 39 +00, 1 S' LefE SUEAFiEAS. IntensiiY-E7umhorr for 10-vear Stvrm Event t7escnp#iioro Rcres C A'C Tme Time lrvtensdy Incrmrrt. Incrmn#. Ravement 0 425 0.90 0 023 {min } (sec.) (in mry tus*aa) 5.00 30[} 00 318 , 5 3(]fl 318 10 5G0 2.24 15 900 i T7 ZO 1200 1.45 25 150a 1 21 , 30 t $M 1.04 To#al '8asin Area, acres = 0025 35 2100 0.91 Compvsite Runcrff Coefficient = p.900 40 24041 0.82 Com6ined (Area' Runoff Coefficient) = 023 45 2700 0.74 50 3000 0.68 55 3300 0 64 60 3600 0.61 TIME flF COR1CEN7F3ATION (mEnutes) ~ ~ 060 70 42f10 058 7e (ovedand Rnw) Tc (gutterflow) 75 45W 056 80 4800 0 53 ct = 015 L2= 31 85 stao 052 zl = 3s 90 ~ 050 Ll (f1) = 18 Z2 = 0.167 95 57[3C} 049 N(A) = D.016 8= 4 100 6000 4.48 S(A) = ❑.0278 n = 0.015 5 = 001 Tc (A) - 021 d = 0065 L 1(B) = a Tc {gui•} 056 N(B) = 0 Te(A+B) 4.21 S(B) = Q Tc totaf 5.00 Intensity ~ 3.18 F'EAI[ DlSCHARGE, 10 YERR STORM: Tc (B) ~ G0 Hvlding 1.10 Q=C•I*A= 0.07 C.F.S. Q(esbmated @ d) _ 007 c f s rima af Cancentration = 500 minufes , A ~ • ~ l?- b 3 8 l fl l ~3 t~ ~ ~ F~ 5 T ° ~'~~P ► ~i ~ a t~l ~ ~ z ~ g ' ~i?tWMAG E CALCU LA71vr4s KwM `I 1F~ A k T,1 ~ . _ kKS A I. z 5 l i o, c r e. ~ Nle-r vr~ve : 63.19 Jc0 3-zt37-4cl - 26¢.50' 35~" AVe+nue-: ~ ~r 53.$6 }6 &}av r- 446.6~ ' , t~~.►~~s ` ~ Dt~~v~s ~ 4 ~ c~v+v _ ~~pDO 0,0~ l$ acr~ DFtvE z- hvl]se5 ~ Z.DDD dr,000 ~.pg 1$ Haus 1~ 4it30o + 20 119"L ki. {}A`713 c1eT'c rA~ ~r+►F~Rv~vu3 51,500 - ZOr`~R`~ ~ ~3+~i D~ ~t.a 0.~1~~~ c~C~~ a-) 012. 533 F~. 3 . - 1z ►~•jFr. ~ ows~rrr~nJ '7 Q~ -~Jr, 3 ~ l 5 t~ng4e Fo,rrel ~r~w~~~ ou* ~ ~ C 1~$~8 ~7C~AtN A~~ CthLCU ~ AT 4t~N 5 K-W m I ST vRAGE STQRAG S A~JA ILN3LE ! p 1v~ t 1►6M► ' z } 15~1 i ~ 3? 4i F't• (3.55 f T. 460 l.ti-Cts f~ a+ 1 l O 1r500 171 (62.} ~ ~.~U fA47'F ~ I - - ~ _ _~_4Y. _ . - - • ° ' - ` ~ ^ • ~ ~ ► ~ zz~ t si • ~ 5 v ~~z v ~rF) Iz,$o-! FTL 534 f3~ , I MtiQ#U[3MS l*FtST ti"° &,DDlrtvR Q83`8 DRNINP•GS CALCULP;TFvN5 _ _ - - - _ _ . . - - - - - _ . FLIw ~ - - ~ - $.5° ' ~ i.ar - Dr►ve.,wau~ _ - - ~ Jl1..tij+141.1,• _ . - ot3r - O.~l(a~ CY•~~X• r ~~r~~`,f~l~l ~ 'l. - a 1 • , • , ~ ~ I* - - - - - - - Q F _Y . ~ f T. - _ °`I Sw~►~~_~iop~ _ Gvnc.. ~prY4%O C ,lr )o . . ~VJC1~le- '5 ❑t~co~M C-'r4.551' S'cVtia4AoA 1l1K'e 0._ ~!iN 0.e- - ~ - f - . - _ _ _ ' ~.5 ~ ~ 1 5' • ° - - • - • - - . • • _ ~ ~~~~0.~~~4,~.7~ ~ ~ i~~l].5~}~3.G4~ 1.~~ Frt~ ~r~~~ , ~ _ - - - - - - - .°~1 o ` Ni .~9~o r~,~ v~, o`~ ~ ~ - - - - - . . , - - F=lw , - 0, e-m?-,nt__ - - - ~ ~ ~ - - - - - - lv - - - - ~,.5- ~ , L5 - . -Tag ~~t~.~iry.•rl~~yy„~1~~~. _ ~ 0.D 161 e- - • r • a c , . c a - , • c . . n. . ~ . , ! , _ , • a . LN°r'FT"/rT. ~ C 51DSwale. $o-ctar►,-.J C.,.r IQ - ' ~D`- - ~B J•'_ S e. C.t40r, 0.1 ~A+t- e- A C~ ~~lV A~'L J S A-.~9 - -8 ~ if`~_ ~ - ' - - - a.4b ~:❑n •''N.'..~' - - - - - - - _ _ - - - ~ 3. F ; ~ . _ - oETEnrnaN BA,sIti oesiGN. RarrarrA, FaRMuLA HYDROLOGr s13awsTaiNc METHaD QR,AINAGE BASIN ANAL'1SI5 for 10 YEAR 5TG]RIIA EVFNT Date. 9031s$ Ptajeet Nama Midi3ame East 2nd Additian .iri6 IVa.. 12838 Ptolect Locati6n° N 112, S 34, 725 IV . R 44 E W M Destgreer 'K. II4{CMUL.K[N Qrainage Bassn Narne' '•8" Disk Qir Ri 16owsfrtng Orainage €3asin Descrtpfron' Onsifa Fiferiart3e: 12=.x[a '2(38' Roriding Area Name. swale Fvr: Tamfinsare P'andirtg Area Lacabon: east side af Verder Qmre Pvint of Concarfttian: Low Pt,, 31+00. Rt. gUBAREAS T1NiE QF CC]NCENTRATfaN ('rC), minutes [38scriptton Hcres C A'G Overtarsd Fluw CRanne6 Flov lmcerwXW '208' j4rees. SeametrtEll. L.2 a 550 Rsphatt Pawament 0.294 090 4264 Ct m 0.15 Z1 a 73 Ronfs 0092 020 0.983 L'3 [A] = 0 72 ~ 86 privavrays fl.[192 0.90 0083 N[A] = 04 8= D Grass L.ama 0.774 015 0.116 S(A) - 0.01 n 4 0 43 rc (A) ~ 0.00 sa 0.012 d = °-355 L1(B) = p Tc (ch.) 5 39 N(B) = a zC(r+g) = 000 sO ~ a rC totaG 539 tc tsj = a a ~ntensdy d 3.11 Tatal Basin Rrea, acres = 1251 Composft RunalE Caeffttierit = 4.44 Combirted [Arr.a ' Runoff Cae3Cicisnf] = p.54fi 0 (estmate~ @d) = 1.7I3 c f s. Tima nf CancenirAcn = 5 39 mmutas i ' '208' pRWhlAGE PARAMETERS `2Q8' Pavemerit Area = 12792 s4+ ft PFAI( QISCHARC3E. 10 YEAR STO€tM '208' Volume Prrovtded = 992 cu. ft at fi depth q,~ I' A= T.7~ C.F.S. 5torm Storage Prirndv~ - ~2 cu. ft. ai 8 deSt'► sawsTTUnG cucuuAnoNs 1% 94 9~1 *0 ~ NllMBER and TYPE of DRYWELLS PRt]P05ED rme Time Irrtensrty 4 dev. V in V wut Starage Irxrmnt. Int[mnt. 1 Single-8atte! (5pakane Cw.srtfY TYFe A) {min.} {socJ (nJhr) {cis) [cu- ft-) (a- €S-1 fCU. ft1 0 Daub[a48arrel (Spakane County Type B) i01' (A'CV3) ~ f autP.'#2 .3' 371 1.1 V I31 3 OlltlibW ProYIdBd: 0.3 cf.S 5 3w 37 $ 17a om 9W 9w 10 600 2.24 122 868 180 658 15 9m 1.77 0.97 935 270 705 20 12[)0 145 0.39 1038 360 676 '~c5 1500 1.21 0A6 1063 450 813 `21W Tf2EATdWENT VOtUME Sfl 7aw 104 0.97 36F34 546 544 35 2100 0 91 0.50 1097 B341 467 Required G PA_ panding Nofum$: 40 2400 0.82 045 1123 724 403 lmpervtous'206' Area x tR' = 53"3 Csi. ft 45 2700 0.74 0.40 1135 810 325 dolume gmvided at S" depth = 992 cu. R. SQ 30Q0 0 68 037 1154 9tM1 254 aK! 55 33[30 0.64 435 1431 990 201 60 3600 p 61 0.33 1235 1050 155 65 39M 060 033 1373 1170 443 aa 4200 058 0.32 13ra 1260 104 - 75 4504 0.56 0.31 140$ 1350 59 STORM 5'faRAGE VOLIlME 80 4800 453 0.29 1420 1440 -20 $S 5100 052 0-28 1478 1530 -52 Ma)amum starage required = 705 cu. ft. gp gqpp 050 027 1503 1F20 -117 voltsme prowdesi at r deptli = 992 cu fk 95 5700 049 0.27 1553 1710 -157 OK7 100 6UUO 0.48 026 1600 18C70 -200, 51mpson F..r+gfneers, lna 90 FHorth Arggnne !?osd, SpoLrsne, WA 99212 (508) 926-1322 b:~n-e 5tarrnwater T]rainage Report II. STORMWATER DR.AINAGE CAI.CULATIOrTS: (eoaatinued) Basin B Gurb C]neniniz at L❑w Yoint, Sta. 31+44, right, RTercler Driwe Curb Tnlet 92 . - h= S in. = 0.67 ft. Tatal height af apening H=0, 122 ft, I7Ppth of watQr at entrance Q 0.41 cfs Total peak rate of flow Q _ 3.087(L)(x)312 for H/h < 1, 0. 122/0.67 _ 0. 18 < I L = Q (3.087)(H)3~ = 0.41 = (3 .087)(0 122)"2 _ 3.12 ft. Gonstruct Curb Qperung; 4 ft wide, 8 in. deep ~ i RATEf]AlAL FaRAAUL.A MYflROLOGY ~ DRAJNAGE 8A5IN AryALYSIS #or 10 YFr4R S7ORM EVENT ~ Qa#e:. 9r36198 Project Nama, Midilame East 2nd Pufdition (lemgn: ktnrrm ' Projecf Number: 12838 DiSit F3a' A3 Vra6onHR10412838x1s Sde Locabvn N 1l2, S. 34, T. 25 N,R 44 E. W.M 6asin IVame B. Basin Descnption Vercler Drive Point af Gancentratiorr: Sta 31+00, 18' Right , SUBAREAS Intensihr-Duratian far 9Qyear Storm Event ' Descnptian Acres C A`C Yime rime Intensrry Incrmnt. Incrmrit. Pavemeatt 0 444 090 0129 (min.) (sec ) (in.lhr) WN 500 300.L10 318 5 300 3.1$ 10 6Do a.za 15 900 177 - 20 1 Z0O 145 25 15f)0 1.27 30 1800 1.04 Tot-af Bssin Area, acres = 0.144 35 2100 0.91 Cornposite Runoff Coeff`ment = 0900 40 240D 0.82 Cvmhined (Area `Runoff Ccefficient) = 0.129 45 2700 074 50 3DDI) 0.613 55 33(10 064 - - 60 36M 0.61 TIME OF GONCEIdTf?ATIOIV iminutesi' 65 3900 060 70 4200 f}.58 Tc (avarlar+d ffow) Te (guffer ffraw) 75 45M 056 $0 48016 4 53 Ct = 015 [.2 = 188 85 5100 052 Z1 = 36 90 5400 (150 Ll (A) = 18 Z2= 0.167 ss 5700 049 N(A) = 0.01s B= 0 100 6000 048 5{A} = 00278 rr = 0.018 s = Qt}11€3 7c (A)= 021 d= 0.122 L1 (B) = 0 1'e (gut.) 2.04 N(B) _ Tc(Pt+B) • 0.2' S(B) = Q Tc tc3ia[ 5.00 frifersso = 3.18 PEAK DtSCHARC;E, 10 7E,F1R SFORM: Tc (B} = 0.0 Hnlding 6.70 0=C"1"A= fl.4i C.F.S. Q(estimated @ d) = 041 c.f s Time of Cancentratiorl= 5.0[] minutes 8 ✓ . t~~3!8 'DRAlKAGE CALCU LATI oN5 KW m ~ 'gAS I - N ~ *[oTfk L ° `3~r5`~~Ss`~ ~ ~1~~`~(s5'~ ~ 2$,~d.v 0.6614 !%cre ~ A - 35~~ ~ve+~+~~ : (vtoo to '4 f Sv = 380 Vdaollawv~ Tlrive : j1*111L to g-3t76.1t = l`1 &80' l19' l0y4? v a, 2-3 4 z o, c r e ~ . ~.t768~ a~cre 3 D^rN e-; ~ l, OOD _ 3000 fjrl- Z7r"4 e- ~ ~ ts~~~~v~aus z Io , 410+ 31oOa + v 'k 2. f7~u S+DPQIcap- E 4V7-fl ~/2. IH. ~ 43Ar TA3 ►~.1rT, ~ [y ~ ~7c?W St~^ t h~ 3 ~ W Xi S~ eJ - STQRAGg 5vaekles 670 f#3 ~ 43~ 42.0 ~ C 1~8~8 2"" POQDLTtioN i L3 R d4 l~l AG ~ CALCLI 1,. AT[ D 1v1 S Wm S V4 ~A51C+1 ~t'Av~[+t~~~ A~EA S"t oRAG~ v i ~ ~'t z' ~ ~ ~ • S v fT-3 P 3 L.3 [5ID)~t8~ " DC7 1TV•g ~Cj fT FC•`) ~ ~i. 3 4 4~ ~ ~l~i ~✓1~`~r~ _ ~,150 1"C-[ ~ (3~•3~ ~Tg) ~ q$ [1~9`~{zo')= ~15~❑ Ft• 3 ~►no ~~l-`1i~ ~~a~ ~ 5 ,~3t7 F~,~' ^~39 '~T• °L3 9 F ~ , c ( 50" ~ 1~~~ ~ x 1 y ~?4L3 ~ ~ z 41 f 1.3 ~ 1 ' 7 •.~~M/• _ _ . ,g . ~ a.~~'~,A~~ ~ . • - • - - - _ ~ - " ~ ~ ~ • r ic~"~C'~.;~'- r ~ . I Ao • - - - - - _ ° ' ~ Y~ _ _ ~ - ~ - ~ - - - - - , - - - - - _ 6-5 . __~__T_. - - - - - ~ - - _ _ - _ - - 70Q af I)riVe~Wa!5 ~ - o • ~ ~ d . - a - . ~ ~~7► . . _ {)0 ~ . . . • . , • ~,;;l~r',.9.. . ~ , ~_n . n • _ • "°i~ - ~ • ` ! ~ . + ~ • 4 • . • • - ~ ~ . .P ~ ~ G} ~~7y°~~[r - _•r_~__r... - °.a:..-~:_" _ 4 r IF-r• - - ' ~~n►aC~ $o~~Cny}v►F___--------__.._..__.. -Cvn~-"Curl~" - Sec-~tiowa..l__r''ore0 0~ ale~ i__ ~s_~~ ~ -1 ~ . , _ ~ 5~ ~ ~ ~I ~ ~ ~ °r~',_ 8_j_~ 1.3 4 r~~ ~r~/ - - a Z.~~' •L~FR~ ~ " I ~ 'ry'LIR,_~~_~_..~ 'O ~ ~ ~ ' - -w- a:Ga. ~___~_-T- - i r ~ ~ ~CA Q`Ckj _•~_-___..._..,.~_e_..._~____._. - - • - , Fr~- _ ---K----~--• - - _..u W ~ _ _ - - ` - - - - - - - - - v:s e. rr. - - - - {7 . _ . _ ~ µ ----r ~ " ~ ~1.5 ~ 1•S r . 5.2~' ~ - } ` ~ ~ . 5 ~ ~ ~oe pri~ewa~ ~ ~.~a°~• , 00 - - . ' ' . . . l • ' ~ ~.~'r.~' . a~ • _ e - ~wale, $ o+#srm _ . F a~, a s ~ ~ e w a~k 17- -~4 ~ ~ a~7~ f► • - ' •~---r_._ r~~__.e._~_ _ - ~ - • r ' i ~$J~~ti~~~?:~~7..~ L.d.'~J~~~ ~-~~~-I ~9~~4~`4~r'~e~ ~ ' " -~'•y- ' ~ _~.5 . 5& '~T - L • • ~'L . F'4 - y ~ a - ' ' _ ~ - - - - - _ ' ° ' ~f YV - ' ' _ - _ _ ° - I _ rp1_. • • • ~ , • - • - ~Cvg o~ D~r►v~Wuy - ~ . ` - - - a3 ~ D.v1~"~ r~•1FT. ~ F ~ ~ ~ ~ . - - --A. 1 _fl.~4~ . -••~~'il~~ p l ' " ' . ~T.l~F~C. ~~~,n►a~t _ ~~vnc. olpe- C b ~ , ~ - - Swale.3a~tarn - ~ ~ ~ra«- 5~~~~.vtna~ f~t►~'e4. _c~_ ..~~~v~le . ' - i~•---._ ~ _ S_Q_ . , - ~ b.'~~1.'L~~ ~ ~~~t~.5~~3.►P4~ l c ' ~ - - - ~ a.'~5 r l . v'} C7. "i i ~ ~ ~ . ' ~ • ~r~~ E~1 ' / • r- • . ~ _ . F-/w ~ 031 ~ O.o1~~ T- _ ~ . i a ~ 4 S " a • i ' ' a . + ' [ ~ n ~7 + ' i . ~ i+.r1.!i..~~,e ~ ~ ~ ~7 ~ /d~~,,`' \I./l~~ ~ ` ~ ~ ~ ,~ra, ~~l.i l~ • ~ ~ ' c❑lnc. - ~ Swule- Ba-t -t C)m~J L- - - ti- - m i- ~ Cross- 5e-c~-tianol Are0. _ _ - - ~ - - - - r ► 0.5) (A .Zq) -i A 3)'~' ~Q.S} ~ . ~ `I/C7 ~ - u - - y.a~ - - °z.0 v ~i , ' ~ • ~0~! 3 'i ; - ---------F~.~.. . o _._s ~ . _ _ - - - - . a` f DETENTiOJY BA551iY DE5IGN: RRT1qA#AI. FQRfNUtA HYDROL4GY 8 8{3WSTRlNG N[ETHQD DRAIIVRGE BASfh7 ANALY515 for 10 1IEAR STORA+1 61IENT Date. 8121m Project IVame: Midtfcme Easi 2nd Adcrrtian Jab hlv.: 1 Z$38 Pralect Locativn: N'dl2. S 34. T. 25 AR.. R. 44 F. W M Omrgner. K MCML1LKIN [7minaga Bastn Name' "C° flisk Dis A1 •#bowstrsng Orairrage Basart DescrspSscn. Qtsste , ilenama• 12838ids `208" Panding Rrea Nama: swale Far Tomlinson Pending Rrea Locaban• nartls sde o! 35th Avenua Paint af C:oncerstra4vn: L.P. 9+60, Lt - 5LIBAREAS TIHiE OF CQNGENTRATION (Tc), minutes I7a5cAOnn Picres C A`C Qverfand Flaw Channal Flaw &aaVvmgs '208' Arses -S-Wrrrent A; 12 _ 360 In1spFatt Paire[nent 4239 0.90 0.215 Ct= u5 Z1 = 7.3 Rcxifs 0000 094 O.L3€10 Ll {A) ° 0 Z2= 8.8 DfWOWays 4065 0.90 0.052 N(A) = 0.4 B= 0 Grass l_awm 9.354 015 0053 S(A) = 001 n= 0.03 TC {A} = 0.00 s = 0.018 tJdhar Rreas: d = 0.280 Srnerrt Lt (B) A 0 Te (ch.) 157 N(8) ~ Tc[AtB] = 000 s(a) = o rC totai s aa Tc (B) = 00 Irtensity= 3.1b Total gasin Area. acm = 0662 Camposite Runaff Caef~'iciant = 050 Cambfnei {flrea ' Runaft CoefMcierrt} ° 0.330 @(estimated @ d) ° 1.05 c.f s. Tims of CeneenVation ~ 5.00 minvtss '2Q8' 4€3AINAGE PARAMETERS '208' Ravement Area = 10420 s4 ft- PEAFC DISCtiARGE. 1D YSAR STQRM 1208' lfvfume Pravidad a 620 cu, ft. Sf B" dePth Storm SWage PrwMad = 620 cu !L at S' depih Q aC' I' A= 1.08 C.F.S. 8C1W5iRINCs CAlCl1LATIt7fVS 95 A & eti 91 ` fVUMBER and TYPE at [3RYWELC.S PR0PO5Ei] Tirrte Tima Irrtensityi Q dev. In V out Storage fncrmrrt. incrmnt a 5tng68arrei (SPQlcane CatrdYTYpe A) (msn.) fsec 3 Cn1NrY (cfs) {cu+ ft.} (w ft) {w. ft.} 1 [3au6la-8arre6 (&pokene CaumY TYpe B) (#so] (A'C-#g) {outf W>JG i C]ufflow Provided• Tc f.s+ a sII~ s~ im 4M 77T 10 600 2.24 0,74 sta 600 -81 15 900 1.77 [].58 5w 900 314 20 120D 145 0.48 624 12D0 IT76 25 1501) 121 0.40 840 1500 -8W '208' TREATMENT VpLUA+lE 3D 18w 1.(}4 0,34 fi5.G' 1800 -1147 35 2100 , 091 0130 682 2300 -1438 Requued G.PA. pnnding welume: A0 2400 0.82 027 678 2400 -1 l22 tmperv'seus'208' Ares xlrd' a 434 cu ft. 45 2700 0.74 024 6BS ZTD@ -2015 volume pfsvidsd at 5" depth= 620 cu. ft. 5U 3000 066 0.22 597 5000 •2303 OE(! 55 3300 064 4.21 719 33Q0 -2581 sa 3oa 061 0.20 746 36a -28s4 65 39f]a 060 020 793 390D -3407 70 4200 0 58 0.19 824 4200 3378 75 45DO 056 0.78 851 45()i1 -3649 ' SYqRM ST(7RAGE VaLl1ME bC) 4800 0,53 0.18 858 480D 3542 65 51 DO fl SP 0.17 a94 5100 -4206 HAaaamum stordge required = 122 tu. ft 90 5400 050 0.17 809 540() -4491 vvlume Pwded at depfh = 620 r:u. R 95 570i1 4.49 0.16 S3..9 5700 -4781 QK' 10f? BOQo 048 0.16 987 BQUQ -543j3 SlmAsm a9i►+eers, Prc. 9t731Yoah Ar9anna Road, Spultane, WA 89292 1Si191ST6-1327 ,~a ~ - Stormwater Drainage Report R. 5T(3RMWAT€R DR.AfNAGE GA[,.CULATICDNS• (continued) Basin C Curb Orierunu at Lovv Paint, Sta. 9+50, left, 35'bAvenue Curb Fnlet 93 (Existing) h= 8 in. = 0.67 ft Tatal height vf apening H= 0.103 ft. Dtpth Qf water at mrance Q = 0.38 cFs Total peak rate of flow Q= 3 087(L,)(H)32 for H,IFi < 1, 0.103J0.67 = 0.15 < 1 L = Q .(3.487)(H)"" = 0.38 -(3 087)(0.143)312 A 3.72 ft. Carastruct Curb Dpening; 4 ft. vvide, 8 in. deep i R4,TIC]IVAL FORMULA HYDROL4GY pRA1NACE BASIN A4Vf4LYS1S for 10 YEAR 5TC7RM EVENT Date 9116198 Pra}ect Name Midklome Eask 2nd RdMon Oesagn: kv+rm Fra~ed Number 12838 D;sk F3$. ,s°t rraaonanio+wza35iCts 5ite Location: N 1/2, S34, T25 N, R 44 E. W.Ni , Basin Name. Basin Description 35fh Rvenus Pvint af Concenfratiora: 5ta. 9+50, 18' LeR SLJBRREAS. fntensit5+-C]uratiorv for 10-year Storm Everrk Descnption Acres C A'C Tme Time Irstensity Incr►nnt. Incamnt Ravement 0.132 090 0.118 {m'sn ~ (sm.) {m.1hr} ~a3 -M 5.00 300.00 318 s 300 318 14 6IX} 2 24 15 900 1 77 20 1200 1.45 25 1 S[b 1 21 30 1$0o 1.L14 Totai Basin Area, acres = 0.132 35 2100 0.91 Composde 'fdurroff Cicierd = 0900 40 2400 0.82 Combined (Area' Runvff Caefficieni) = 0.118 45 Z700 o-74 50 ❑ 68 ~'i 3300 0 64 s0 36D0 0.61 79ME 0F CO1dCENTRATiQN (mirsutes) E5 3900 060 ' 70 42D] 058 Tc (gverland ifow) Tc (gcrtter ffaw) 75 4500 056 8(] 48[}0 053 Ctr 415 L2= 145 85 5100 (]52 Z1 ~ 35 9c) 5400 03{} LI {A} = 18 ZZ = 0167 95 5700 049 N(A) = 0016 8= a 100 6000 fl48 - - 5(A) _ 0.0278 n = 0.016 s = 0.Q25 Tc {A} = 0 21 d~ 0103 , ~ L1 (B) _ ❑ 7c (gut.) 121 N(B) = 0 Tc(A+8) ` 021 5(8} = ❑ Tc tofal 5.00 Irsterss[ty = 318 PE4K DISCHARGE, 10 YEAR SxORfi+l: Tc {B) = 04 Holding 5,17 , Q= C` I' A= 0.38 C.F.S. Q(estma#ed C d) = 038 c f.s. T[me of ConcenMQn = 500 msnutes ~ 7 'r ~ e , MtiDILOt'r1E SA5T 2"''° At>DCT(,)N l ~.7V-AINAGS CALCU'LATlvNS ~Cll+ll'~ _ p NCZEA z ~do ~~.7- otcre ~ Ne-r c-l#-r• T3+riVe. : - I5TY P"[e-hue. ~ ( 4-L~~ ~0~~ °13 0tCre- 'D+riYes +,d' VY'iv e- p` ~~4Fs z .5 z,oora -~i.l ~ loMo 0.1,06 Q~re. lk~use. X7-1018 + 4tid+DI7 + lof Dov ~ 7.61679 fk.L 0.51 '97 ae're- _ ~ Gt~►•~s ~ ~ 9 Da ~ ~6+ Wg 1 ~ ~2. ~ $19 1't1Z .z. ~.9 8 30 o,c~-e ~~vRAGE R~Q]]1~'ED : 2.v6~ S+or~3e_ = Oza a8 t ~t'), ~ ~~►a.~Fr. ~b~ ~~wstriv~~ - 5-1`l Sarre.l Drjwc~l 'S 19 5 - 9 0 -7 f+~ ~ - ~o 1283~ . M~u~1.oME EASS 2N~ A~UITtoN ~VRA~NAGE CA~c~~A1ioN5 _ gp~S1N PAVEMENT AREA u2o8" SWA~E STORAGE SToRAGE KE4wRsD AvRl1..A61rrc " ~1 O FT~" ~ Ft3 V2 (so)(ta'~ = 900 F~'' 38 'F1.3 (sc) (~.9~ Fzt) 99 Ft. o~ w D3 (50 ~ (,a') Z 900 F TZ 3a Fz.3 (5D )C ~.~8 F~?} ti 99 SIIOS \ lZ 7.24 f 1 3 r} ~1) ~ c1.q~ ~9 C4 ~T3 s N ~~1 Ft3 OS • C~q') C~~l L 1,47-7-~ ~ - - - - l~1~) = 1,~-4o F-cZ G o F-s 3 (55`~ (1 •98 Fc?~ ~ 1 oq gS 3 ~ p 17~ (~~3`~~«~ s Z,o34 f~ 1 ~85 ~T 3 (5~ ~(~.98 FzZ~ 11l FT3 ~ ~ • ID8 O fiZ O F'T3 ' FT~~ 12l0$1 ES? 504 f'!3 q01 FZ? ~ ~ ~S`~ z . . ~.r.L- ~ , , ~ ~~r h~~,-' - .r ~ l'AID►l..aMS SKST SVID AD'DLTi lvN ❑F~P►l~lAGE CP+L~UL.+F~Tt~t+l~ - - - - - - - - - - f W - - - - - - - - - - - - - - l3` - ~a.s~.r~.~.r~z- • ' - f ~ - = - - - - - ~o'-- Qr- k ve_vi a%3 . • ~ - ' 7' ~ i ~ ~ ~ O4 - O.C1~ln`I r~•~~T• r . 1.. 1 • ~ • ~ ` ~ ~ ~ • t r- ~ ' ~ - , y~s ~ - - . • - - _ • _0' 1 I Co F T. • ti ( F z - - y - ~ T.~~ ~ Sak~ S~°'~~- _ L' oV►c.. p C,kxlo - - - Sw~Ee ~ o~$ornn . ~eC-ts.o V\ ati_ 141're0. ~-,N a~~. - - - - - - ~ ~'.ra' - ~ ~t.~` ,r - - - - ~ - - (3.~4} - 0 ~Y $.29~ o.a l Wk~ - - - ' r •-r~,~~.- p ~ • • - ~~W f ` - • • - ~ E d. S ~Ytn ~tnt - I - - - - ~ - - - - - - l - - - - - - - - S . 5' - , 1. 5 ~ " TvP o~ Qrive~v~y • - 0.0 46_1 1' • r a ~ • ~ e , _ - - ' ti n• a~ ~ ~ ' ~ ~ ~ ~ • 3.~ n 'Q . + ~ ~~l.~1.:1..1.;i,~liiri n..~ ~ 31 ~7 ~ s~~ ►7~e`l~~ ~ tiu.~.~~ 0 ..1 )ra ~ .c:R FT•~~Ff, .0 ti5~? Co~nc. - - - - - - - - y wn1e 5dape Swale, ~o~~'~m~ C•~,~'+o ko~-- - - r-- - - - ^ttc, no,1 Arar~ r"r ~ 2ti,~ ----i - - ~ 4e-~ I`~•- - r,~, - t..13/ .a3) p.5) -~c lre~- ` ~ _ ~ ~ - - - - ~.❑1 _ , - - °.~b z_~]o ~'ti~ 3.5 5 F ti r a~•- . _ . - - - - - - _ ~ ~^~'e'~'~7i w'~rr , _ _ y~~'~'r s~~ , ~ . `r-,,-~ 2~r.~.;~'~,•. Y - QETENTM B{k.SW DE$IGN. Rf1T1dFlHL F'C]RMU1..A HYDROLQCiY & 6OW$TR1NG AlIETHOO - DRRITUtGE EiAS1N PJVALY5IS ior 49 YFr4R 5T❑RM'EVENT Date: St2n19 Rrojed Name: MitiiWme East 2nd Pddiban .kab No.: 12838 Rrssject 4ocatnn N 1/2. S. 34. T 25 N. R. 44 E. W.M. ~r. K. MCMUI.K!N [7ramage Basin VVama: °p° - Qisk Ou.: Ai:bswstring Qrmnaga Basin Descmptiarr Qnwta iFilerarrre: 12838sds '2{]8' F'nnding ,Area Narrts: stvale For Tamlirmn Psnding Area Latation• nmti side of 36Sh Atenua Po3n3 of CaRCerrtration. E.R. 1+73 $6, RL 51113AREAS T1t41E OF CONGEIYTRATIDN (1°0). msnsks Oescnption Acms C A'C ❑verland Flcyrs+ Cfiannel Flaw lrrinervrous '208'Arsew 29MMrer7fA. 1.2 s 42() T5Phai PMMffMM 0277 0.90 0-250 Lt = 0.15 z, = T~ Roofs 0230 0_90 o_zo~ (A) - a Z2= 8.6 Dnveyray~s Li.092 0.90 0.483 N(A) = D.4 8= F~ crass Law,, a.M 0.15 0.147 s(A) m a,o1 n = 003 Y6 (lel) a 0 QQ S= 0.01$ ggw Areas: d ~ [i.3T8 ~Cd~rrt B: L1 (6) = p Tc (ch ) 3.65 N{6} = p Tc(At6) - 0.00 5(B) _ 0 Tc totaf 5 QQ TMa1 Ba Area, arres 1582 Tc [B] ~ dA IrttQrtsity = 3,18 sin = Camposr6a Runoff CaefficienL fl 043 Cnmhirted (Area ' Ruroff Caefficjer►i) ~ Q.SB& Q(estimated d)= 2 18 eSs.. rime rd+Coriceatraton ~ 500 rrtmups `268' QRWPdRGE PARAMEfiERS '208` Paaernent Area = 12031 sq. ft PEAIi D15CHARt4E. 10 YFr4R STORM '20B' Vo[ume Provpdod = 907 ev. ft+ at fr depth Sbarm SEatage Provkied = 907 eu. ft at B' dePth 4=C' I" A a Z9 8 C.F.S. FC3W54RIAIG CALCLif~P+T'tONS -71 A A A & Oi ar 1dUAABER and 1'YPE of ORnh1ELLS PfFOf'(]SE] rme Tirm lnWnsRy Q dsv. V in VOLt 5taraga - • Inermr€t. fncrmrrt. f~ 5ingls-~ (Spni~arte ~riiy Type A) (Fnirr.) (set.) (inlhr) [cfs] (axi- It.) tt] (rxu.1t) 1 [}ot6ls-~ (&pakane Courity Typa B) 5~d8 3.°f~ QutRovv Provided' 1 cl.S. 5 ;9b 3.i 276 t3Ti LZD 677' 1[} B00 234 1.54 1079 6[74 479 15 9t10 1.77 1,27 1217 900 317 20 120U 1.45 1.00 1298 1200 98 ' 25 150d 1.27 0.83 1330 1500 -170 72W TREATMEIV4 Vf]Llfln[E 3D ,aw 104 0.71 1358 teoa -442 35 21 OD 0.91 0.62 1375 2100 -725 Requsrad GPJI pondim voduma: 40 2400 082 0s$ 1408 2400 -M !m-,. n'2WAieax 1 iY = 503 cu. tt 45 2706 074 0.51 1423 2700 -1277 tolume pmvdgd aE 6' depih = 907 cu. R 50 3000 0.68 o.aI 1448 3000 -a s5z Orc ss 3300 0.64 0.44 1494 330D -iaos so 36QQ 0.81 d.42 ySSQ 3600 -2= 65 3800 0.61) 041 tsaa 3900 .2252 70 4200 0.58 040 1712 4200 -2488 75 45M 0se 38 1769 4500 -2731 STORM SFORAGE VOLLIAAE so 48M 0.53 036 7 783 4800 30 t 7 95 5100 052 0.36 1$5$ 510p 3244 Malamuun shrage required ~ 577 ru. R. 90 5400 0-50 034 f 888 54451 -357 2 vaftrrte providsd at 8' depth ~ 907 cu_ IL 95 5700 049 0,34 1951 5700 -3749 0!(1 100 fi= 048 0.39 2010 ww 3980 Slmpsm Engkwer,% lnc. 09 N'anh Arumrn Rar4 Spc1rarje. WR 83212 (509) 925-1322 Ra...o Stonnwater Drainage Report II. STORMWAT'ER DRAINAGE CALCULATIONS: (continued) Basin D _ Curb Ooenins at Low Point, Sta. 1+78.86, right, 35" Avenue Curb Inlet #4 h= 8 in. = 0.67 ft. Total height of opening H= 0.096 ft, Depth of water at entrance Q= 0.20 cfs Total peak rate of flow Q= 3.087(L.)(H)37 for H/h < 1, 0.096/0.67 = 0.14 < 1 L = Q = (3.087)(H)32 = 0.20 = (3.087)(0.096)32 = 2.18 ft. Construct Curb Opening; 3 ft. wide,-8 in. deep Curb Ooenine on Continuous Gra.de, Sta. 28+73, right, Vercler Drive Curb Irilet #12 Sta. 28+23, right, Vercler Drive Curb Inlet #13 Sta. 28+73, right, Vercler Drive Curb Inlet #14 a= 2 in. = 0 17 ft. Flowline depression at opening y= 0.06 ft. Depth of flow in normal gutter Q= 0,06 cfs Design discharge Qa/La = 0.04 From Fig 16(a), page 6-39 "Spokane County Guidelines for Stormwater Management" L= Q/(Qa/La) = 0.06/0.04 = 1.50 ft. Construct Curb Opening; 3 ft, wide, 8 in. deep n. . RATIONAL FORMULA HYDROLOGY DRAINAGE BASIN ANALYSIS for 10 YEAR STORM EVENT Date: 9i16r98 Projed Name: Midilome East 2nd Addition Design: kwm Project Number: 12838 Disk File. A1 Va4onaf510112838.bs Site Location: N 12. S. 34, T. 25 N., R. 44 E. W.M. Basin Name: "D° Basin Descnption: 35th Avenue Poirrt of Concentration: Sta. 1+78.86, 18' RigM SUBAREAS: IMensRy-Dura6on for 1Qyear Storm Event DescripUon Acres C A'C Time Time IrTtensiry Incrmnt. Incrmnt. Pavement _ 0.069 0 90 0.062 (min.) (sec.) (inJhr) (a+-sm 5.00 300.00 3.18 5 300 3.18 10 600 224 15 900 1.77 20 1200 1.45 25 1500 1.21 30 1600 1.04 Total Basin Area, acres = 0.069 35 2100 0.91 Composite Runoff Coeffiaerrt = 0.900 40 2400 0.82 Combined (Area' Runoffi Coefficient) = 0.062 45 2700 0.74 ' 50 3000 0.68 55 3300 ~ 0.64 60 3600 0.61 TIME OF CONCENTRATION (minutes): 65 3900 0.60 70 4200 0.58 Tc (oveilandRow) Tc (gutterflow) 75 4500 0.56 80 4840 0.53 Ct 0.15 L2 = 90 85 5100 0.52 Z1 = 36 90 5400 0.50 L1(A) = 18 z2 = 0.167 ss sroo 0.49 N(A) = 0.016 B= 0 100 6000 0 48 S(A) = 0.0278 n = 0.016 s = 0.01 Tc (A) = 0 21 d= 0.096 L1(B) = 0 Tc (gut.) 1.24 N(B) = 0 Tc(A+B) : 0.21 S(B) = 0 Tc toral 5.00 Intertsity = 3.18 PEAK DISCHARGE, 10 YEAR STORM: ` Tc (B) = 0.0 Holding 3.21 , a=C•I•A= 0.20 C.F.S. Q (estimated @ d) = 0.20 c.f.s. Time of ConcenUaaon = 5.00 minutes o ~ . ~ E _ . ~ lix t ~F^xr~ r, ' u w.iw~ N~ ' - - -'g~~y . '~'~~~~i•~ p ~ - ~ ~ RATiaNAL FoRMutA HraRaLaGv ' DRAINw~E BAstN ANaLvsis for 10 rEaR sraRM ~ENr IC7ate. 9116W Projeet hlame: flAWAome East 7rstl Addibon Design. kwm Prajed Number 12838 ok&kR& AlVabonanIrn12s3sids Sde Locatinn• IV 912, S. 34, T 25 N., R. 44 E W.M. ' Basin Narne: "0" Basin Oescription, Vereler Drive --I Porst of Goncentrawn Sta 27+73, 18" right - Ste. 28+23, 18' nght ' Sta. 29+73. 18' ngM SU8ARE,AS Irtens:tv-Duration fvr 10-Year Storrn Errent ❑escriphasr Acres G A'C Time Tme Intensiry - Incrann4. Inczmnt. ~ Pavement 0021 090 0.019 (mm ) {see) {in.lhr) 500 30000 3.15 • 5 300 3.1 8 10 600 2.24 15 900 1.77 20 1200 1 45 • 25 1500 1.2i 30 18{i0 i .fl4 - i"otal8asin Area, acres ~ 0.021 35 2100 0.91 Compwrte Runafl CceffkNenf = 0.900 43 2408 0.82 Csmbined (Area ' Runoff Coeffmient) ~ 0.019 45 2700 0.74 50 3000 0 G8 55 3300 064 6a 3600 0.61 TfME OF COIVCENTE2AT1ON (rrunutes) 65 3900 4.60 70 4200 0.58 Tc (avertand ifaw) Te (gutter ffvw) 75 4500 0.56 80 4800 0.53 - Ct = 0.15 l,2 = 513 85 5100 0.52 Zl = 36 , 90 5400 om L1(A) = 18 72 = 0167 95 5700 0.49 N(A) = 0.01 6 B= fi 100 6DOO 048 S(A) _ 0 C278 n = 0.416 ° s 0.01 Tc (A) = 0.21 d y 006 L1 (8) = 0 Tc (gut-) 095 N{8} _ a Tc(A+B) ' 0.21 Sp = C] Tc tcdai S.00 irttemMy = 3.18 REAFi DLSCHARGE. 10 YEAR S70RM: Tc (B) ~ 0,0 Hcitling 1.78 Q'a rr *I*A= 0.0Bi C.F.S. q(esGirated @ d) ~ 006 c.i s. Time vf Cpncentation = 5.00 minutes pi~~.,'~r• ~ , _ ~~''~.0f r ~ ANN DEPTH 'OF' FI.OW - y - FEET .02 .03 .04 i .03 .06 A8 .10 Z .3 .S .6 .7 .8 .9 ~-dt.0 .01 ~ ~Tl---. • .I 1 1 s ' ~ ' ; i ~ • ~ ~ .a ~ . I ~ I±i ► I ~ ' 1 ~ ~ ~-r . s -r- --7 - - -t- T -4- - I - -L- t-~ +7 1 --i-- •„-t" .3 Ln to 14 I .oe _ I I ; i{~ I I I d~ti~ /i~ i ✓ I~ I ~ i(~ I i~~ .06 \ 05 s I I ~ ~ , I I I I I_ ~ I~ .0 .04 os ~ . I ~ l ~ I ~ I I ~ ~ i I I ~ l I t 1.0 (a) DISCHARGE PER FOOT OF 1•6 LENGTH OF CURB OPENtNG ~----t---~-'-+o ~ .s 1NLET5 WHEN INTERCEPTING 100 % OF GUTTER FLOW ~ •4 1 I I I I 1 °'6 I I I I~ I.a QC (b) PARTIAL INTERCEPTIQN ~ RATta FOR INLETS OF I~i LENGTH LESS THAN La Z I _L i - ~ .io 1.0 L/La CAPACITY OF CUR6 OPENING INLETS pN CONTINUOUS GRAOE 6-39 FIGURE 16 ~ ~ C~'~ r'~ ~ 17 i 5 c~ ~ . 0 . +0 7-S ac~~ ~1av~t. ~I~rcler ~ri~ae : ZGt6~.1~ ~o Z~t~~o z ~~_$ti 3CT~ A\1e~~~ ~5~ ~ 0 06'} + 5, ~ ~Z, ~ ~1 .l ck cre~ 'D\r i •ie: m_ 1, 0[7 io Z~.itJ [7c e- f ` ~D rj y-C5 'Q -Z t 'o0~ -Z 10(]0 0 .0 "T 59 AC1re- F-ov ~ z 5~11~ ~ ~ ~aDt7 J.~.,O~Z IMY~RV `c U 5 G fe-A 91112. z S,638 - ~~~~►~~E ~~aul~~~ : -Z 9 ►~1~fFs'- ; `39 . 'T /4k D ~ t -r t d N ~ z $ 3 19 ~'zpg9' SVJALE S'T a~FtS 9 . 5I D g A G:-Z RVA[l.ASt~C 63.s i') (1.1 s = -z-i 15.-1 C) (1.c~ b 31 O•`~~ f.T.,L)= 3,~z~. ~~r ~ l53 F~ ~ r°'. I F"~ ~ ~a3~a'~~1~~~ - ~ !~~7 3 f~~'~~I.'o~~ F~=~~ ~ tlt ~CT ~ L ~i.r 3 0 r C) i•~ t -r ~ ~ - ~~~1Z F~ Ti-~ cr13 f T~ IL -7 Z C"C3 - M1WU'aC`r1S SAST 2.mo P,`D'7v~ti7N TDRP~L~IAG~ ~~+~-CU1~A~1vc~5 . - ~ -a- - - - - - ~ _ . - w_____.- - - - - - F-IW - - - - - - - _ - ' - - - ~a5a.+nr►e.r.°'r------• - , - - - - - - . ~ - - - , ' - - - - 1 o ' - - - . _ _ _ _ _ _ _ . _ _ • - - - ~ ' - . - _ _ _ _ - - - - - ~ - - - - _ _ _ - a~r Dr►v ~w~_`~ _ _ - - . _ . Y c,c, I I Y ' _a. 1 ~ ~ ' ' ' r/l~ia~ 1 r 17 4 fy I i' . g o • Z . - ~ ~ ' I N or q~ ~ T. f FT. ` g C - - - - - ~w~le ~oT'tvvr+ - - c~• G r ~ _ • - ~p~ , p . ._Y~ _ ~ 1 i7.1r1A1 ..A-r~e~_._tr"T~~'~.LYV ot~e. - ~ - `I - - ~ l__ . 0•~~l`~.2.°! ~ Y~~p.S~ ~3,~41 ~ l • ~ S FY.~ _ a'! ~ 4.29~ ,^45 ~ ~ - 4 - - a.~1 - 1 l9 ~ ~1 ~ ~ '~T ~7`I~J - • - - f _D, t• rti..ti, . ~ ~r Fr _ . ° - - • - - - _ . = ° ~ .~i.~- _ -•T• • L ~ ~ A ~~iY►_~Y1~ - _ ~ ~ ' ~ /w _ I-- • - - • ---Y - _ - • _ _ • . ~ b~ _ • • ° _ - . ~s ' rw ~ r ~ 33.r'~' • - - - . _ - - 7aIF of flrivewa~-~-~._ _ ~ - ~ _ l • q-`., _ - ' lGi ~ F~. 1FT. , ~ '4 . , m _ t • Qd • , ~ _ .o i - 4' + a t ' a , I ~ • ~ • ~ + • . 11~11'~rfi~`r~1,.1iTi - - ~ : - - - ~ -i I ~ 7 4 ; - - ~'~`•.'~`J~'.~„`i' . ~ ILI °r~a! j~'._ - - - - ,0_~.~~!~ - ~ Cav~t. ~e .~.-5w wl e- $ at t orr, _ . - - - - - - - - ~-.wrrlo I-~=-~ k0`.._"rr~ ~ i:a.~J '4 ~ re~f -~r~~J~ ~ - -~z_ - - - ~ "~r- . , o."~► .,w - - - ~--.~r~'~r.____. p:''~.`._ _ - ..w._ - - - . . 3.55 - - - - _ _ I]E7EVi1QAP B1kS[P! DESIGN: RY4120NAL FORMUL4 FlYl7i4❑LC7GY & Bt]WSTRfNG FAETMpO DF{AINPIi`aH BASIN Ah1ALY51S for 14 YFF1R STORNf EYENT I C}afle 8/1&98 ProletE Name° Middone East 2nd Addition Jvb Na.. 12838 Prajod Lacatinn hl 1C2. 5 34, T. 25 N.. R. " E. VV.M Oesigner K. 11+ICMULK1AI _ Orainap Basrn fVame: "El Disk DiF.: A1:16xwrs-din9 Dre1na98 83sin DesG1ptian; orisft Fikmame. 12&8sds '20S" Par►ding eeuea IYarw ewaEe Fcr. Tartdinsan Pnnding Arn Lacatvn rtorth side eT 36th Avenue - , Poirrt ot Coruwytration E R 0+38, Lt 5UBAREAS T1ME QF CONCElVTRlS10N (Te), manutes Dascnphon Acres C• A'C Overtand F3awr C'hannel Flow ImnefwW T"' Arsaw nn~nt A: ~ ~ P~a#t Pavemettt 0.117 ~1.9G 0.106 ~ ~1.i S Z4 = T~ 3 _ Reofs 0.046 0.90 0.041 C7 (A) ° 0 Z2 ~ 8.8 odvowmY9 0.046 090 0.041 N(A) n 0.4 $ a p Gra.ss Lanm 0 793 4.15 0.4w S(A) = 0.01 n= 0.03 7c {R} A 000 5m 01009 d = 0.287 ~merrt B- Ll (s) = a rc (Ch.) 290 N(B) = a rc(a+8) = 0.00 S(B) = o TC toffii 5.00 Totai Sawn Area. asres g 0408 Tc (8) ~ 00 Infsnsify = 318 CamRmrte RunotlCoaHfeevd= 054 Combined (Acea ' Runs#[ Coefffciestt} a 0.218 Q(estma6ed C d) a 069 cl s. 71me of foncartrAan = 5.40 minutas "208' DRAINAGIE PARAN[ETERS '208' Pwvsment Rtea R 5112 sr}. ft. , PEA3C D15CHAF2QE. 10 YEAR 5T[7RM '208" Vvluma IPtmndei = 272 eu. ft+ at Er dspth - - 5torm Stotega F3rmvided - 272 cu. tt, aII 8' dep1h 4= C'!" A= C1.i68 C.F.S. BOWSTR3NG Cr4LC[lG.14T1C3NS aP~ ~ F* A- NLfMBER and TYP~ at DRYWEl.LS PiOPt7SED Time lime frt~ Q dev !1 in !7 au! Starage - - Ircrmrrt. Incrmnt 1 Single-8arrsl (SPokanaC,ourrtY TYPe A) {min } [sec ] (inlhr) (Cfs) [Cu. ft.) (Cu. ia+. ft.T 0 Dou4le-Wrref (5pnictiee Courtty T+yQe g) v.~ 3'~$ (AeC iy dT$ f~ d3uICa+rv Rrovidsd: 0.3 c?.s. 5 im 3-a u-0 279 90 1w TO &00 4.24 0.49 343 !BO 163 15 900 1 77 0.39 397 270 117 - 20 1200 1.45 0.32 412 360 52 25 15m 1.21 0.28 423 454 -27 '208' TREE4TMEHT VOLUi4SE 30 1800 1.04 0.23 431 540 -148 - 35 2100 0 91 020 437 630 493 Requued G PA poodtng valutre• 3(I 2400 0J82 0.18 447 720 -273 ImPww%ous '26$' Araa x 1/r = 213 Gu. !L 45 2700 074 0'16 452 810 358 vciume pmvWoda! f' depthe 272 cu. ft. 5D 3= 068 0.15 460 500 440 flK3 55 3300 064 014 475 990 -515 68 36DO 061 013 482 iOBO 588 65 3908 0.60 0 i3 524 1170 -w TO 4200 0.58 013 544 4280 -716 75 45D0 0.56 1J.12 562 1350 •388 STORM STORAGE VOLUNiE s0 4800 0.53 0.12 568 1440 -874 &5 5100 0.:2 0.1 T 530 1530 -940 &Eaxmum sWce" m4uwurl = 189 ar ft. 50 fi400 4 50 0.14 600 1820 -102fl vWsune ptmded at 8' dspth = 272 su. R. ~`i 5m 4.49 0.11 674 1710 -1090 ,pK! 100 6000 [}.48 010 639 18t1Q =1169 SFtr►Asw Envkmers, Im 9M 1Varoh Argmnne fPaaq; Spoketmk WA 99212 ~509J 9I6-1322 ,~+g . , ( ~ Stormwater Drainage Report II. STORMWATER DRAINAGE CALCiILATIONS: (continued) Basin E Curb Ooening at Low Point, Sta. 0+43, left, 36h Avenue Curb Inlet 95 h= 8 in. = 0.67 ft. Total height of opening H= 0.085 ft. Depth qf water at entrance Q= 0.15 cfs Total peak rate of flow Q= 3.08?(L)(I-)'n for H!h < 1, 0.085l0.67 = 0.13 < 1 L = Q = (3.087)(M3'I = 0.15 = (3.087)(0.085)312 = 1.96 ft. Constnuct Curb Opening; 3 ft. wide, 8 in. deep ' i I IRATIONAL FORMUl.A HYORDLQGY DRAff+FAGE BAStN ANAtYSIS For 70 YEAFt ST{]RfN El1ENT Date 9/1698 Prorec4 Name. Midilame East 2nd Ad0on Qesign: kwm Projed Nurnber 1283B Dtsk Fla A7 lranana141[A4308.x15 Site Locafton N 1R. S. 34, 7 25 K. R. 44 E. WM Bassn Name "E" $asin Descnpttvn 35th Avenue Point qf Goncerstrahmn 5ta 0+43, 18' Left , SIJBAREAS' InTensdV-Duration fvr 10-year Stvrm Everrt Qescnptron Acres C A'C Time Time fntensity Inc.rmni Incrmnt Pavement 0053 090 0047 {min y (sec•) {in-mr} iNi W _ S.iXi 30000 318 5 300 3.18 , 10 60(7 2.24 15 900 117 aa 1200 1 .45 , 25 1 sm 1 21 30 18(HO 1.04 Total 6asui Area, acres = 4053 35 2100 091 Cam{xosite RunofF Coe{fipen# = 0900 40 2400 0.$2 Comhiaaed (,Area ' Runaff Ccefficient) = 0047 45 2700 0.74 so 3000 0.68 55 3300 0.64 60 36}f} 0.61 TIME OF CC]NCENTRATI[]N (minutes) ' 65 3900 060 ' 70 4200 0.58 Tc (avedandifaw) Tc (guftertfow) 35 4500 0.56 80 48f10 053 Ct = 015 5 L.2 = 47 85 5100 0 52 Z9 = ~ 90 5400 050 L1(A) = 18 Z2= 0 3 67 95 5700 049 N(A) = 001s B= 0 100 6000 0A8 S{R} = 0.0278 n = DA16 s = 001 Tc (A)= 0 21 d= 0 G85 L1(6) _ ❑ Tc (gut•) 070 N(B) = f] Tc(A+B) - (].24 S(B) = 0 Tc total 500 lntenssty = 318 PEAiC D1SCFfARGE, TO YEAR STQRM: Tc (B)= 00 Naldirsg 1 67 Q-C*!•A= 0,15 C.F.S. Q(estimatecY @ d) = 015 c f s Time of CancerrtraGan = 5.00 minufes _ ~ .1 . . • ~ ' ' . . „ • ~r DzAoN/kGS CAM1.CULATtv+As ktWM $ASti~ ~~u iN FS A 'T or A L. 14-,7-00 -Fi.?- -,.(.`103+ ~cre ~0 C'f'►V'C. ~ .34t4 ~VE~l1E . Sv 5*o6.61' : -LSG.$i.r %~~IV41A r-uAD : ot l~ jo 3} 89.84 $43s,", it,vsNuE 7- t ~(t8l~ FAC'E'e- ~`v~:►V~s ~ ~ ~r►aes ~a 1►vvD ft,` w ~~pDv ~~x D-41~s r~Gre T-oQFs Il,(aa ~Y S,Do a -t kz,t~+ov 0.4563 acrr~ ~ LTaP~RY~o~~ ! AGr-ASS z-g,j6-i6 = 45, 5Z$ ~i.l- 1. C+Sj 6,crf . E 0I , (w1 c, l2. m . iE-r 351 + `Z. 17auL(,e $corre.l DwywLLlS S wale-s A- - - ..f ~t ~.'sr~~' b~ . - - -~.~UFti_r~'~yp, :sR, ~ ~ et~itq•~ . _ r . rr.s~ . ~ ~%~e~ _ . . . +a.''±'~,,_ ti. R;t~ , • , ~ - . Nllv~uvt^~F- SAs~ Z" NDti kT%lDN cALcUt-A~ IvNs 17> AS 1[til' 7-a$`~ SWALS 5'T~~ P~C E STOIZAG E ~~Q1]1R~~D ANJ Pal L 148 LE ~r, 3 ~ ~ , , z tav ► -w P~- ~ ~ i ~z~~.$4 ~~t8 ~ _ ~ p t 9 l f 1 lpi ► " t ~ J P ~3 at f~t ~ ~ - ~ _ ~~v _ ~t2.40 135 ~~~•98 t T.'~ lzl FT 1D f~. S F~~ , .v ~ M " ~'r''~.~ r~~'',:'~`~' ~~w +~C~ Rb~- . _ _ --~,y `~-,rit~,~ S~ `Z 83,8 . _ . - - - - - - - - - - - - - R 1w1 - _ - _ _ • _ ti~, - ~asa~.~v►~- . . - - ------~r_~-_----- - -y-- _ • •,~1'- _ - • - .'_J .~f . ~ 1.5F ~ . ~r ~ ~ ~'ao ~ n.o1G`~--rT•IFT. r= ` ~ ,y ~'~Y y • ~ . ♦ ' 1 - . [ T.-: n F T- `13 ~tiv - - - - -~arr~",[ SWa~e..~~~~e - D~o~~m~` y e ur~a Swale. 13 ottow+ - - - - - - - - - - ~ - _ a_ lq__ _ 4 ~ . _ a - - - _ _8.5` : J~ ~ ,r,y~ - - - - - - _ --~---z ~z1~a•~J~~.~.1~ ~ ~ -YiX0.5~~3.~4~ . _ ~ a~ ~•r9~ 3~G5 ~ - . _ _Y.~..~-~~ - v- - - - ~ - - - . ~ . t3 . ' ~ r ~'~f~r - ' -Q~~ ~ • ~ti.a . _ • . • _ _ - - - - - lv~ - _ i - - - - r ~ $.5~- - - , . . . - - - • ~aP p f ~~iV~Wa~ _ ~ . _ _ _ ~ 0.0 W7 F3.1 FT. ~ ~ ~ ' • • ' ° ti ■ ' r d ~ 1 ' l ~ ' ~ ' 4 • ^ . ~ _ .i~ i Irfl ~ . _ os'_ " _ ~f,~ ~ _ ' lg ~ ~ ~ •!It ° . 1 ~14'7 KF ` ' ~ • e-~ sto__ _ .~y - - - - ~,owe. pe Swal~ ~[s~t~ ~J Cr~.r'b Cr055 - Se(--tlvnaA Area ol'c Sw a4e- (0. °o ~.~5) (A,'~..q) i~ ~-l~c~ ~ `g 0.~~ z.. a0 ' . . _ ~~f~~:___ ~ ~ ~ _ . _ _ _ _ _ . . _ -"-3.55 r-t~ „ . _ - - • ~~'.xtas~~ 7. : v: .a.. o,'d;'. s' . . . - 't y• . _ z '1 •wma~_- ~M~ j1 •a^i.ti -~'`f.~T;~ ' - e - • r E: W ~ ~ • DETENTION BA&IAF OE51GN: RATKAtAf, FOFOAJLA FIYDROLOGY ~i BOWSTRII+iG l4[ETI-IOD DRAfNfRGE 8A5iN ANlILYSiS lor 10 YFAR STORM EVENT Date! 8118I88 Proled I+ame: dhAldt'foe»e Eat 2nd Addrban Jad IVa.: 12M Praject Locahrsn• Rl 32. S. 34. T 25 N,. R. 44 E. W.M. IDesionw. @C l4CHill.iCf1M1 f]rairMa Basin Nsm: "F" ' Bisk CNar.: R1:16mstring [Jrairrage BasLn E1esrrsKtian: onStta Filename: 12838xds "TW Randirtg Arae Nwne: swale For 7omfirsan P+mdirtg Area tcr.ahon: vvest sisfa vf Yrgirpa Road - Putnt ad Car4srrtrirtlan: E.R. D+38, LE. SUBd4RFJ#S 1'IME f7F CAHCEIVTRATtOM fc . mintfiss Descrirrbun Aeres C A'C Dvedand Fknv C?ssnnsi Florsr wwn~lxn 288'AMj& 12amedA: L2= 320 AspFuit Pwverrwrt 0268 0.90 0.241 Ct= 0.15 Z] a 7.3 Fto~ 0.278 4.80 0248 Lt[A] - 0 Z2 = 9.8 Drfveways 4114 0M 0.103 N(A) a 0.4 8 a 0 Grsm i,.am 1045 0.15 0.157 5{Ay = 407 n= 0.03 7c (4) n d OD s ~ 0.014 OuwAfeas: rJ = 51.391 ~meRt 8~ L1f8} = 0 Tc (ch ] z.72 N(8) ' 0 Tc(4+B) ° a.Da 5(B) = 0 Fc tota@ 5.04 TC(8)C 0.0 trtens'sty a 3.18 Foai Basin Ama, aaas a 1703 Cwnposft Rur+oEFC.aefficisnta 0.44 Can+6irM EArea' Rumlf Caeffkiarif) - 0.748 [3 4estirrm6ed (ID d) ° Z38 c.f.s, Tims of CarFCenftdan = 5A0 msnuws '2W I3RNNAGg FRfTAME7ERS .w '208' Paverrren! Area m 11678 sq. ft PEAK GlSCHAfiGE. 10 YEAIR 3TORM '2DB' Volume Frovided n 595 cu. R. at 8' depth . Stonn &tm" Rrovded a 596 eu. t1. at depM Q= C•I' A a 2.3$ C.F.S. Ba1N83'RiNG C.AtCiiiA110[Ju A A ob a$s ir- NUMBER end TYPE oT DRYVYELi.S PRQPaSED Tinm Tmm tr+wmky a dev. V ire V' aut 5mraoo - 3nermwil. tncrmrR. Q ainGW-Barrei LSPubna CouritY TYPe Rf _ (min) (fnJh,~ ~('C ) {Cu. IC.]~ [ i~.~1 a ~t5-i8} 2 drwble-~Bar~ (Spcrkane CaecntY TYpe B) 2'38 W* Ciutflow Provided: 2 C.f.s. o zm Of m AT 10 B00 224 1.68 1177 1200 -23 15 90d 117 122 1328 1800 -472 20 120g 1.45 1.09 1413 2400 -W 25 t'S00 1-21 Q.91 i45Z 3Dfl0 -15+18 -2DEr TFfEJ41'h+IEN'r li(3LUME 30 7800 1.04 0.78 1481 38W -2719 - 35 2100 0.91 0 88 15DO 4200 '2700 Reqtiued G.PJL pond'ng adurt►9: 40 2400 0.62 0.61 1536 48W -3'I84 tmpemoiz `208' Am x 1r" _ 487 au. R 45 2700 0.74 a.~ 1552 540a -3848 wolurm amvkfad at ir depan A 59; cu. fL sa 30ao a.es 0.51 isas saao .4421 aKI ss 33ao 0.e4 0.43 1830 SSW .asaas SO 36DD 0.89 0.48 168t] 7200 -5610 65 3OW asa 0.45 1797 78a4 .60M 70 4200 058 4.43 1 S#3B 8406 -ssn 7°5 4500 4.58 0.42 9829 9040 •7071 57'i7RM SYORAG€ VOLi1ME $t7 4800 0.53 D.dfJ 1"5 9600 -T&W 8d 5100 0.52 0.35 2025 iano -8175 NAaasimum storage re4sr'and g 357 cu. R so 5400 0.50 027 2059 1f380a .8741 vauM POWKW Si a' 60M° 585 w. iL 96 5700 0.49 0.37 2128 11400 41272 Ole 100 54100 0_48 4.38 2192 12€100 -98M Skwsw Erfl*mw% lrrc: 909 IYarrh Argmm Ruad: spokane6 vYA 99212 R50192194322 „A~.F - ~ r a^er . Y.._.. . -r~~ N~ ~ .ri s ~y, r ~ " . , %r `;r r'S,`a+~' ,r s 9:~.~ yx~s'Y"~~+,. .w-;~ ~ • fi - . , ; . _ ~ . Stormwater Drainage Report 111. ST[]RMWATER DRAiNAGE CAT.CULATIQNS: (continued) Sasin F" , Curb Onenine at Low Point, S#a. 0+43, raght, Vrirginia Road Curb Inle# #6 _ h= 8 in. = 0.67 ft. Tatal heig°tt Qf opening H={7. 108 ift. Depth c]f watcr at cntratGe Q_0 28 cfs "Tota1 peak rate vf flvw Q= 3.487(I.)4'H)32 far 11-1i'h < 1, 4.10810 57 = 0 16 < 1 L = Q = (3.087)(H)312 = 0 28 + (3.087)(0 10$)3' _ 2.56 ft. Construct Cwb Oper,ing, 3 ft. wide, 8 in. deep s : " , - ' - t . . _ _ . ° - ' - y; ' ' - • ; - f - ' . - . - ' _ • - ' RA7fONAL FORMULA HYD€dOLOGY ! DRAINAGE BASIN WNALYSfS for 10 YEAR 8T(]RAA EVENT Date: 9116/98 Praject dVame• MidifameEast 2nd Addrticcrro Design: 6m Projecf Number 1M8 otsc ~H& nrVabo,an11X128Wjds Sde Location N 1f2, S. 34, T25 N, R. 44 E. W M. Baean Name• "F" Basin Qescnptior►: lfirginia Raas! Pvint esf Goncentraban: Sta. %AX, 18- Right 0+43 5U$AREAS IrrtensitV-Duratian for 1[,-year Starm Event Descnptaon Acres C A'C . Time rme Intensrty Incrrnni. Ircrmrat Pavement 0.097 0.9I1 0087 {min } (sec•) {inJtv} Nn`sa] 5.00 30D.IX0 318 5 300 3.1$ 10 fi0l]I 2-24 15 900 1 T7 20 120} 1 45 25 i 5w 121 3~ 1800 7 04 Totai Basin Rrea, acres = 0.497 35 2100 093 Composite RureofF Coeft'iaent = 0900 40 2400 0.82 Grunbirted (Area ' RunvfTCaeffirsen#) = 0087 45 2700 $.74 . so 3000 ~ 0.68 55 3300 0.~'i4 60 3500 ❑.B9 1'1ME flF COIVCENTFtATION [minutes). 65 3900 (].60 70 4ZQ0 058 rc (ovadsnd Now) TC {gufter fifow) 75 4500 0.56 8Q 4800 D.5.3 CC = 0.15 L.2 = 147 85 5100 052 Zi = 36 90 5400 a.50 L7 {A} = 18 Z2 = 0.187 95 5701) 0.49 N(A) = 0,016 8= 0 100 6000 048 S(A) = [].0278 n = 0.016 s = 0.09 - Tc (R)= 021 d= 0.108 L1(6) = D TC {gttt,} 188 f+R{8} = 0 Tc({I+B} = 0 21 S(B) = a Tc tofai 5.00 Wensity - 3.18 P'EAFt QISCHARGF, 10 YEAR StOR4H: Tc (8) = dA Holdirsg 5 24 Q° G` I* A= 023 C.F.S. Q(eshrrsated @ d) = U 28 c.f s Trme of Concentabon = 5.00 minutes F , . , ; T'~''~-i,, . = r - . . .r~a•!:.C` . -g~-~=xd~.,,,"~ Y'~; . , .,s•"}tv. a . y a ' - , . 1 La~~ ~ASY 2"B f~aR L~r~~N 1~~38 ~ 'D?-kkNAGS CALCuLAz IONZ - -s Is z AT~~A IolAL . ~ 3t. aco~e A v T 6,s 410 f '~.L '35 Th NI s N !3 E 5,180 MavPL.AwN DR019 ~ R1va 5 z 3 'DriVe- ~ ck ~,~"r3U T7. ~ 3j000 0.afo189 0.CYt ~17t'%v@ 3 i oo0 0,0(089 OLcre- !O[]O t 3 ti3s3'0 1'~~'Q ~ n• p.~~~~ 0.CP~ ' IN` S-Cbr-FaGs n) "~n$ 5t'OrCk 9e. ~z. in F~. 1O} $avN s~r~y~~ 'Dau~lL ba,rrre-l Drjwe.lrl O.D J5 Du+) ~ ~ ~ ~ ,.'_;+~s~'~LL : ri _•~~''~~~'°~~a''"-.~.°'•rN`K'~',^"~_ i ~3`.- ~ , =:t`s~=`'~='~~. _ , , ~ . " , . - 3 i • I'L S 3$5 N1IV1LtaMS ~-Av~ -L"D ADA vTiv N 512619B DF-ANA G E c P~L C 4J LPTroNS k l N Pv SNt SN~ A R SA " ~ @3 A ~ ~ S'T o9 AG E S'T aR►'kCaa UIi? ED l4q P% ILW°+8ltF- G ~ ~ f D -~t ~ ' • ~ ~ . ~ - - 53 f~t~ F~3 -t (b~0•9 8 F~~~ ~ 13v F-T ~ ~ (10`) (Z-D') ~ I,~'o❑ tio❑ FO (15') (2- d) _ t,~o '~,45$ ~r~~' ~'a►l- - l1"Ivo i-t 7, -11 ~_t 3 (96) (1.3,. F_j~) = I2.[] f_[.3 CG 4- s D 2.v (60) 0.34 Fl.1) ~ $l F1.3 - t~ytS -L p rC~~ 4c~r jj3 3 I , l- -~~.:r..s;cF r~„ ..nY•.,,•~4:v.~.-~-sti,.,:,Gr,~e:k+n_ a:.ar•:..- ai ~(~y pyy ~ jv y ..`i~~.'._fi.]~ Y CJ~ -t "4 _.l'p`,' . ~rf~. rt'' ~ p `4 r ~ ii" , _ ~ •'~''~f'~Tj~~ l~~'pA , ' M~DILOME ~AST 2N~ A~OlT1oN M~3g DRa~NAGE CALCUI.ATloNS . _ ~ ~ ~ - {s: _ : - . • • - - . - - - . _ . . . R lW ~ - . Ap - - ~ _ ' - • - - F.•-,~ N Y~R~+ • r•~ ' 1 1 " ' " ' . G.ZS lo.ZS' _ ~ _ ~ _ I _ 5~ ~ . - - - - ' - Top-pf Tr~v~wan oo°~° , e . ' ~ ~ ~ 1=.1~ ~ . a . _ . . '~7~• • ' - . • ~74 . . . . . . V . ~ ~ . . . _.7111.h.I.~~a~,~~ . ~ - - Fr~ •G~ p ~ F~: ~ - . _ - - ~ SwwCe Bo~toY h ~Conc-~C~•.rb~-------- a~d S~dewalk . i - ~ - - - - - - _ 1O 'O, cross- Sect►ov%Al r\rea o'~ SWA1e ~..-L----1 . ~ ~ - , o . , ..(_i).~°:S }_L2.68 ~ -~~`-~~0.5'~ (Z~.G.B'_~ Z--~•34._~~z - 2.G6 ~ 2~Gg - - - Z - - - SF- 6?-- 1 ~ -r - 0. G l - o. G'L ~ - - - ~ • ~ F% 0~~ • ~ r~, p~ • - • - - - • i . _ - - ~ - ------------R-~w-~ I - - . _ ~ I - ~ ~.5 l:5 ~ _ ~ . _ _ ~ . ~ - - 5,25 6.5 ; ° _ _ : , , - • ' rZop of ~riveWay _ 2.00°l• . - . • t:l%~ _ - ~ - ~-i... . . . . i ~ . , . - '~h'` . , , . , ~ - • - - - - - ~ ~ - • - - Z27' ~ ~ Q ti '`G . eroh~. C urb 12' g' n~a S►aewalk ~ s.zs' 13 - Q ~2.ZS~'2:2s" - - 5~2~_ ~y '..~ti_~ ~ -~i)~o.5~~2.z5~--E-(°•S,(3 ~--}~z~~~'S,~~z :.5 ~ . 0-56_--- - ` ~ ~ ~ o, SG _ ...._.t.5 v~ Z ~ - ~ - - - ~ - :7: . : . • . . . . - ~ c;~~,isiu7 . s,~~?.~,a~~:r~:-.r..:;: ; • - . v • ~n.: ~,,~.x~. - r.u~=•.aiss,nr<:. ~ y aa..::...,. . > t ^ ` _ ~cYe`,'~~~ :'y~"~:'::~,ir,~~~~l,t ~,~9Lt'•'~ _ - ~,ic•.e+s a54... , -'"r'~d";sk.~":,1*~e#.~,°y6'~-.e~. J:~` ;•°~~34~k4 ~ :"x~ r ' s"'h . . • - ~~A~N~.G~ GALG~y ~f~rt~Dt~15 - ---f--- - ; _ _ . _ _ - - - - - - - F=jW - - - - - - - - - 4D ` ~ aol-- 0.ol6`1 cT•1FT ~ ~ ` • ~ ~ ~ ° ~ • . ; • a , ~ •r ' a . . c a • ' t ~ r~ t1 ~ - - • • - A.l~{p • ~'~,,./J` _ r ~'~Fl- ~,~~C.~" y~ ' ~T. jy p•~+~~~~ CvYnC-. C.ar1p - - Swwa~ ~ v~taw+ ~ ~ - _ _ ~ ~ = _ ~ . _ - - - - - - - - - - - - . _ i~(o .5~j~~.~4~ ~ ~ ~ _ _ v ~ - $.~9~ a_~.5 ~ ' - ~ - - - - 0.9 l . . - - lCp. - - ~ • ~'jW ar~~sre~.yj \ ~ • f~~Yll ~ 0.0 46"7 ~ _ ' I ' ri ~ " ~ . L ° a - _ " • . ~ . 1 . ~ ' G t ~ • 1 a, I I I. ~ i . ~ i! ~e 1 ~ I i i i - - ' C' FT ~r di ~ ` Y ~ e~~ ~ ~ r r ~ ~5 • y • ILI 1 - ---~°r-~,~~ 5t0'._ - - - .p ~ ~,oY►c. pp Swale.. $oT-t 0 n1~.J • _ 'ne... _ • _ .1 1..~:• - - ~ t...i ir3~ ~a~~.1lvY►0.~1f ►~i cN Cs~ _ _ . . _ - °~'~i ' +ti - ~ P_ ~ j ~ ~ .~.~..9 c~'~ l•~3~.~~~ '~i~~t7,5~~~.'~.9~ rt ~z~''~0.~~~1-"~~~'~ ~4.~~~$,o~~ ~'cT_ b.~$ I~ ~F~ \ , _ 3. ~ ~ ~ i • • • • - • - • ~y. 4 .e_ . _ . _ - . - . - • - . _ . DETENTION BASIN DESIGN: RATiONAL FdRMULA HYDROLOGY 8 BOWSTRItJG ME11iOD DRAINAGE BASIN ANALYSiS for 10 YEAR STORM EI/ENT DaEe: 8211'98 Projed Name: NUdilome Easi 2nd Addili~on Job No.: 12838 ProJed Lxation: N 12, S. 34, T. 25 N., R. 44 E. W.M. Designer. K MCMULKIN Orainage Basin Name: "G' Disk Dir.: A1:lbowstring Drainne Basin Descripbon: Qnsft FiWrame: 12838-ids '208' Pond'mg Area Name: swale For: Tomlinson Ponding Nea Location: south side of 351h Avenue Point o! Cancerttradon: LP. 9+50, Rt SUBAREAS TIME OP CONCENTRATiON (Tc), minutes DescriDtion Acres C A'C Overtand Flow Channel Flow -2Q8' A 290 Asphaft Pavertnertt02T3 0.90 0245 C~~tA: 0.15 Z1 = 7.3 Roots 0.069 0.90 0.062 L7 (A) = 0 Z2 = 8.6 Dtfveways 0.069 0.90 0 062 N(A) = 0.4 B= 0 Grass Larm 0.515 0.15 0.077 S(A) = 0.01 n= 0.03 Tc (A) = 0.00 s = 0.019 OtherAiees: d a 0.304 Seqment B: L1(B) a 0 Tc (ch.) 2.50 N(B) = 0 Tc(A+8) = 0.00 S(B) = 0 TC OoffiI 5.00 Total 8asin Area, asres = Tc (B) = 0.0 Intensity = 3.18 0.926 Composite Runoft Coefficierrt = 0.48 Combirred (Area ' Run(yif Coeffiaent) = 0.447 Q(estimated Qd)= 1.42 c.fs. Time ot Concen"don = 5.00 rtnnudes '208' DRAINAGE PARAMETERS '208' Pavertient Area = 11870 sq. R PEAK DlSCHARGE. 10 YEAR STORM 208' Vdume Provided = 713 eu. R at 6' depfh S6orM SEaage Provided = 713 cu. R ai 8' depth G= C' I' A= 1 A2 C.F.S. BOWSTRING CALCULATIONS ~ ~ ~ ~ ~ & #7- NUMBER arkd TYPE of DRYWELLS PROPOSED ' Time Time Intertsiry Q dev. V in V out Stcrage Inermnt Inumnt 0 Sirple-Bartel (SPokam Cu+MY TYPe A) (mm.) (sec.) (infirl (ds) (w. R) (cu. R) (cu. R) 1 Doub"arte! (Spolcana County Type B) M1'M (A•C'Xi) (ouff."i2) WS-m 5.db -w.Ob .~i8 1:42 57i ZM z OuMaw Provided: 1 e.ts. a :sab :fi8 tM $7i :sDb 27r 10 600 2.24 1.00 702 600 102 15 soo 1.77 0.79 792 soo -108 zo 1200 145 0.65 843 1200 -w 25 1500 121 0S4 866 1500 -634 '208' TREATMENT VOLUME 30 1800 104 0.48 883 1800 -817 35 2100 0.91 0.41 895 2100 -1206 Required G.PA pondinp vdume: 40 2400 0.82 0.37 918 2400 -1484 Impervious'208' Area z 1l2' = 495 cu. R 45 2700 0J4 0.33 926 2700 -1774 volume provided at 6' depth = 713 cu. R 50 3000 0.68 0.30 842 3000 -2058 pKI 55 3300 0.64 029 972 3300 -2328 60 3600 0.61 027 1008 3600 -2592 65 3900 0.60 027 1072 3900 -2828 70 4200 0.58 028 1114 4200 -3086 75 4500 0.58 0.25 1151 4500 3349 STORM STQRAGE VOLUME 80 4800 0.53 0.24 1160 4800 3840 85 5100 0.52 023 1208 5100 3892 Ma)dmum storape requirod a 271 eu. R 90 5400 0.50 022 1229 5400 -4171 vdume prwided at 8' deplfi = 713 a. R 95 5700 0.49 012 1270 5700 4430 pp 100 8000 0.48 021 1308 8000 -4692 S/mpsan EnQliww-% Ina 909 North Aiponno Rb" Spokanek WA 992f2 (5Q9) 926-1322 as. o ~'°~a-q^'~,~ 1 ~qk'~?~:'"".`L:- r.C.s. r- s:-~w ~sw•~u+r•r-vf-yas~m~ .-~s ,~s.:' -~.~k'"~ . ~ , . . • ..,,",'x~.9a. . . . . , , . , Starmwater Drainage Report II. STORMW'.ATER ;DRAiNAGE CALCLILATION5: (continued) Basin G , Curb [7Dening at Law Point, Sta. g+SU, righit, 35'h Avenue Curb U3let 97 is i i h= 8 in. =0.67 ft. Tatal height af ogening H= 0.094 ft. Depth of waCer at entraace Q~ 0.23 cfs Total peak rate af flow Q- 3 087[L](H}3'2 fbr HIh <1, O.09414,67 =0.14<1 L = Q= (3.087)(H)" = 0.23 =(3.087)(0 4}94)3i2 = 2 59 ft. ~ Gortstruct Curb Opening; Xft. wide, 8 in. deep • _ _ . ° . . RATIQN14L FC1RM1AU[ P1 HY17RaLOGY C]RAINPAGE BAS1N ANAALYSlS for 10 YEAR 5TO'FtM EIIENT Date: 9116I98 Pra~ect Name: Midilom Eas# 2nd Addition aesgrs: kwm Project Nwmher 1283$ omsc FtW ai Uabmani(Aiz~as 5i#e Locaiion• IN 1/2. S. 34. T. 25 N., R 44 E.W M. Salsm Nartte: "G" Bmn De.gcriptiorr' 35ih Avenue Point o6 Conoersh'alion 5ta. 9+5(], 18' Righf SiJBAREhS Intenssty-{7urabon Tar i0-year 5t4rm Event Qe=nption Aeres C A'C Time 'fime Irttensiry drtcrmrrt. Incrmrit ' Pavement 0.[]81 0.90 0.073 (mEn ) {sec.) (in.lhr) (4t'BM 500 30000 3.18 5 300 3.18 10 600 224 15 9m 1.77 20 1200 1.45 25 15(]tl 1.2Z 30 18[lO 144 T+atai 6asin Area, acres = 0.081 35 2100 0.97 Crsmposite Runaff Goeffiaerrt = 0.9(]0 40 2400 0.82 Camtuned ~Area' Ruriof[ Coeffiawd} = 0073 45 27IX0 (].74 , 50 3000 0.68 5.5 3300 0.64 sG 360C1 0.61 YfME {]F COIVCENTRATION (mmutes) 55 3900 [].BO 70 42{10 0.58 Tc (overfand itaw) Tc (garfter flow) 75 4500 0.56 80 4B0[7 0.53 Ct = Q 9 5 I.2 = 1[34 85 5100 0.52 Zg 36 90 5400 ❑.50 - LS (A) = 1$ Z2 = 0.167 95 5700 0.449 N(A) = 0.016 8= 0 1{7I] 6000 0.4$ 5(A) = 0.8278 n= 0.016 s = 0,0149 Tc (A)= 0.21 d = 0094 LI(8) = 0 7C (ga) 1 79 N(B) = D 7e(A+S) ' 0.21 S(B) = Q Tc tc#al 5.00 Infensdy = 3.18 PEAiL OiSG'HARGE. 10 YEA43 STORM: • Tc (B)= 0.0 HcWM 3.71 U=C •I"A= 0.23 C.F.S. Q (esfirnated @d) = 0.23 c.f a. Ttine af Goncentation = 5.00 nunutes a , . _ ~xs`~p~'~3~~ ,sd~ _ ,-.-:-~r;-~•=. . ~ ~ . , ;*"~'a+!~~.. ~.~,,:v~;~~ 1z83$ M1PU-oMS SAST 2" JN'~DITtoN 5 17-G19 g ~ __DgAINAGE GAL.CULATlvNs ►~WM ~AS 1t4 INFIEk 9312-0v ~im~rAL ~ TAV'C- ZD' ~~aTi1~ I~V Q~W'JL 'S~ 5$d~.~~ ~e ~ ~~i ~ ~j o~ ' ~ iro,iv►ia. '~oo~ : h ki8 ita 3-r 84.84 ~ ~'v~ `s A { ~ ^t~~1 3'] ~ Z[] ~ ~ ~ $r ~ r ti '~a~ ~a ~t ~ Q . Z~ l ~ s~C r ~ ~Rl'+f~~ ~ ~ ~~►V~~ ~,QU~ ~~"i t 7- L7~►Ve. Q~ Roa-~ ~~~•►~~~~~~s ~ 1~,.,~`~~ + 3,aov + 63, 51~- d~ ~-~'r'ts~~~. a~ev. cahs~de.re.a rtis ~ev~lv~,~.~] oa~sife area . ~ ~~1 ~ Z ~7'~ S T a r ~ ~ ~ i G TC l2 t . x ~r, ~ p~ „1C } 3 .r $oYrtt 17r~w~l~s ro~~ ';rt'3 tY > l.~rt4~rw¢ L• .,~,i~ ~r~ ^~.a w1~1 r. f r,. Z 4~~ a~•~'~~+.`R'41a. ~ , i++v_~ . ~ • ~ v€=A 11~1 A G~ C.1°~ L~. U'~ A~i ~ a N~ ~C~! t~*4 ' "zvs4 ]WA" $~sI tA '~►~v~t~~~a~ Szo9PAS (ZD+) `Z~ ' Os') ~ 1,146 ft. .89 t~$ _ Iz, ) 6.15 f-M _ M!8 ~Y ~Z I ~ylZ-060 -Z,Z$~n (15.100.99 F'i3) 31 0 W) ~ 5,160 a~s -3 R f 1 C::, 530 j .3 ° ~ ~~4a 1~S ~1 9 ~ts.~~ 1~1 ~ ~ 0 ~T~ - 6aZ ~i! ~""s~' i~~Fx.w.. , v~n ~y~. -=~v~,~^ W' R ` P~~ L~F¢} r~ ~'F, y srw: f~ .=~r 47 ~ ~ M1lD11.OMS SAST -Z"" kDD 1T tiDN - - - - - -~1~ 8 DRAINACse CALC1] LA"C t flN5 _ 4___. . Y _ - - - - ~ _ ,w _ - _ - _ _ _ - ~ ? - ~as3rC►L'~~If'1~w_._•..• • - _ ° - _ • - ~ - - - . . • - - • • • - ° - c _ _ - • ~Q`• - • • _ - • $.~r • , ~ I.~~ - - • • - . . . Y ' , . 4 001•~ O.D~I`a~I• C~.IFT ~f - VIk`!"1~1 ~ . - p • , • . 4 . v c 1 ' . ti - \Yy ~ • ~ i! , _ ~ ~ 1 / ~~~'m ~ ~ e. r`~'~~~~ • ~ - - AOIC-~ _ r._ --r - - Swale, $ott 0 m - - - ~ - - ` --_l~- _-__.►a---------•---------_- ~~~-.~ec#im.~~~. ~r_~~..~ 7 ~ ~ ~ ~ - ~l z J~'~•~~l`~.~"6~ ~ ~ Ji~~~3.5~~3.~~t~_.~--°l $ ~Yi _ ~0. 1~ ~ `~.2.9~ ~.G5 ~ _ _ ~ _ _ _ _ IaQI _ • - - p.9 t .e _ _ . 6 ,7- - - ~ - _ • - . - • ~ 1- --7J---_. - . - - ` - - - 10' - - - - - - ~ . 5 ~ - - - - ~ 1. - - - " ~ • ' J ~ . _ _ _ -~p~ af Uriv~wa~-•-~- _ - _ _ _ _ ~ - ~ i ~rA o, ~"Y1 o~ G'! Fi. f F -•---•-__..T.__~_ ~~~`~J• : ~ 1 ' ~ ~ d . , ~ • - ~ • - • . '~71,~ i . ~ ~ ~+i ~ ~ ~4. , - ~arma~ ~ IF~,__ - - - - - - ,Carnc. 5lope 5wule. Lv~'tr~w,~ Cu.r1o - ivL_..~_ - - k G-- - - ~ - 5'5i Cro5s - Se.cTs o,ak Area ~o" Sw a1e- i - . _ - - - • • - - co (0.5)~4.~.~i'] .9 3) __---~'C•'~~ ~__.~r I • _ _-._..e_ _ l~❑ 4eT ~j - ~.~0 J_ ~~~Fr-------~ _ . - - _=.3.55 - _ ' - . ~ . - , ' . ' .i:~'- «,rF _ E . - . . _ -,.-rr . . -.yi• • . . +f : ~.v..:rc rx.~_ , . ' , _ y 't , , ' . , r r - - . - . a s _ . - • ~ - DETENrION BASI+1 E]ES~',N: FA7IONAi, FOFtAAUlA FiYCJROLOGY & BOlYSTRING H[ET'FiOD , ORAINAGE 8A5JN MIRl.Y515 fw 10 VEAR STORM EVENT - 02ft: 8I18= Pmiect Natne• Mtdilan►a Fast 2rtd Rddtirarr ,106 No.. 128M Pmod 4.acahorr: N tfF. S. 34, T. 25 iH.. R 44 E. W M. DeAgrter K. NCMl1CJC4V B[aittW 8mn tkme: `ff" Oisk 01r.: Ri:lbonrsftM 0ratnage 8asan DasCnAticin: Ors+fe Filmam+a: 12836-,ds . '208 ' PandIng Area IfVarre: swa[rr For Tom13nsan Panding Ama LoCaHcn: , east side aE Vnpsnm Rcad Poirt of C.arwarttradon: E.R 0+38, Rt 5llBfIREAS TiluE OF CC7AfGEhiTRq'fiIOIV (T~c . rnfniabAs Dsscnobarr Acres C A'C C3verland Flow Chsnrd FFavr LnRwtrrolp '2Q,8` 4-M-49 a~ A L2 = 350 Aspha3t P'aHamans 0291 0.90 Q2&2 Ct - O.i'S Z1 = 73 Ro4la 0.324 0.90 Ul8J Ll (N m Q Z2 a 8.$ Orisvmays 0.069 0.94 0.062 WN 4 0.4 B= 4 Grass 4mEm 1.458 0.15 0219 &(A) = 0.01 n= 4.03 Tc (A} ° 0100 5 0 0.012 01herAr~es d ~ 0.418 Legfx?nt 8: L1 (9) = 0 Tc (eh,) 3.07 ' N(B) m a TctA*B3 = O.W S(B) = 0 Tc tow 5.00 TC (B) ~ 0•0 hftnsity = 3.18 rutEti Basin Area, aci = 2.140 campvAe Rurmf Caeificiwet ~ 0.39 Cvmbined Ossa ' Rurwff CbdWenty m 0.832 Q(esfinratsd 41 d) ° 2.65 cl.s. T'ime of ConcenaGan d 5.00 mitutes '2Q8" DRWAiAGE PARAARETERS '2Q6' Pmvsmartt Ares - 42676 sq. R . PFAKDISCFII1RGE, 10 YFJIft STORW '2t?B' Vc+lume F'rarnded - SM su. R at 8' dsM 5tarm Storaga ProvEded # &22 en. fL aY ir depth f~ ~ C' A~ 2.96 C.F.S. B3W57R1NG C46CULH7f0NS IG A 35 lw d~ NL1ufBER snd TYPE dORriNEf.LS PROP06EiA Time row mmrty a dev. v in votd sm~~ ftKrmnt incnnrrc. a ~ingk~-~ (s~ ~ Type A) {mur) 4sM1 fmim (ds) (CU-1L) [C+-Q (w. ii) 2 [7rrubiie-Barrei (Spakam coui* Type a'1 ` fA"C#~:3] ~ a~ ~ Ouglow pmvlded: 2 r..f.s, ~ :gD ~F$ 2"8e~ on oD 41M 10 fi00 224 9 J88 1308 120D 108 48 900 9.77 1.47 1475 1wo -ns 20 1200 1.45 1.21 1571 240D -M ' 25 1500 1.29 1.01 1813 3000 -1387 '2W TRFATMEldT !i~`iCl11uCE 30 f$w 1.04 0.8T 1638 38aL1 -1954 _ 35 21 OD 0.91 0.78 1661 4200 -2533 ReQwred GPA AoWIng vaturre: 40 2400 0.82 0.58 1707 4800 -3093 Irrtpemous'208' Rrea x1Pd` = 528 eu. R 45 2700 0,74 0.82 1725 SdOQ -38M vofume Frwided at i" depth _ 622 cu. R 50 3000 0.88 057 1755 mm -4245 pf(! 55 3300 064 4 53 1811 6640 -4789 Bt1 3600 0.84 0 51 1879 72W -W21 Sa 3900 0.60 0_50 1998 780[i -5802 70 420Q 4?.56 048 2078 5400 -6324 75 4500 0.58 0A7 2745 5000 46,58 5Tt3Rhof STQRIIGE Vt3l.UME 8+A 48t1O 0.53 0.44 2161 9&Q@ -743S 65 5100 062 4.43 225D f O20Q •7850 Maxmum s4orap reclcared ~ 463 ru. R. 90 5400 0.50 0A2 2289 f p8q0 .8511 Rrcdume pravxied wt doM~ 622 cu. R, 95 5700 0.49 0.45 2365 1140D -XGS (]iCC 100 8000 0.48 0 40 2437 12000 -a589 5wpson &44aa►x, fw- 909IYuilA Arparans RorX Spokwm WA 59212 (80) 926•1371' , ' ~'P 5 •1Fq~ Y. r ' . qr :'`~J...lI , ' , .F'N Y~,Y'~.'iAY~` c i _ .,i'i i • ;T: #~Ll• ~y'}RCIY16eq~,f,]!, Kl 1 \ ~ ~I Stormwater Drainage Report U. STORMWATER DRAINAGE CALCULATIONS: (continued) Basin H Curb Ooenine at Low Point, Sta. 0+43, right, Virginia Road Curb Inlet #8 h= 8 in. = 0.67 ft. Total height of opening H= 0,105 ft. Depth of watcr at entrance Q= 0.22 cfs Total peak rate of flow Q= 3.087(L)(H)312 for H/h < 1, 0.105/0.67 = 0.16 < 1 L = Q = (3.087)(H)32 = 0.22 = (3.087)(0.105)32 = 1.90 ft. Construct Curb Opening; 3 ft. wide, 8 in. deep Curb Onenins on Continuous Grade, Sta. 6+10, left, 36`h Avenue Curb Inlet #t15 a= 2 in. = 0.17 Flowline depression at opening y= 0.08 ft. Depth of flow in normal gutter Q= 0.11 cfs Design discharge Qa/La = 0.454 From Fig 16(a), page 6-39 "Spokane County Guidelines for Stormwater Management" L= Q/(Qa/L,a) = 0.11/0.054 = 2.04 ft. Construct Curb Opening; 3 ft. wide, 8 in. deep . i I , - s ~ . n .+x'• F ' ' f,. RATIC]NAL FORMUUA HYDRC]LC3GY f3RAlAl11GE BASIN ANALYS[5 for 10 YEAR 57ORM E1JENT Oafe• 9fi5M PraMt Name- Midilome East 7nd Asidjbon Design: kwrn Rrtject Number 12638 OmkFTIm nz szbmani0ka285"s 5de Laradoas: N 1rZ S. 34, S 25 N., R. 44 E W.M Bamn Alame: °H" €3astn Descnptian• Yrgmm Rnai Poirrt of CnnKxwrhztion: 5ta 0+43, 9 8' Right 5U6RREA5• Pntensi#v-Duratiorr for 10-year Stvr►ri Evern Desenptmn Acres G A'G Tme rime Irrtensity Incrmnt Ittcrmnt. Pavement 0.076 090 0.069 (rmmin.) {sec.} firrJhsj [A"'SM 5 00 300.00 3.18 5 30D 31$ 10 600 2.24 75 50a . 1.77 20 12DD 1.45 25 1500 1.21 30 1 800 1.f)4 Tcsta[ 6asin F1rea, acres = 0076 35 2100 0.91 Corrtpasite Rurtofi Coeffmk-rit = 0.900 40 2400 082 Combir~ed (Rrea ' Runoff Cneffir3errt) _ 4169 45 2700 0.74• - 50 :iQOO 0.68 . 55 3300 a Q.64 60 3£QO 0 61 TIME O!F CONCENTRATfON (minutes) 65 3900 0.60 70 4200 0 58 Tc (overfand Aow) Tc (guttar ilvw) 75 4500 0.56 so 4800 0.53 C! = 0.75 [..2 ~ 97 85 5700 052 z1 = as sa 5400 0.50 Li {A} = 18 Z2 = 0.167 95 5700 0.49 rrfAl = 0.016 8= a 100 6DOa 048 S(A) = 00278 n = 0016 s = o.oar7 TG (A) = 0.21 d _ ❑ 105 L1 [Q] ~ a Tc (girt•) 1 44 fV(8) = 0 Tr,(A+B) 0.21 S(B) = 0 Tc total 5.00 tattennsrky = 3.18 PF-AK D1SCHARGE, 40 YERR STORM: Tc tBy = 0.0 HokMg 3.4s p=c• l&A= 0.22 C.F.S. Q(estirrated @ d) = a.22 c f.s. Tim of Carcen4'abon = S.DBI minsrtes H .r",r'C•taP'^~¢~.6;«:...., . _ . n z ^ ' • ' y yyy~'I~ ll ,t.i. ~•i,~+:~+~,«w:livF7, i+iY,iTf6lY•R:.Rr..? .•1»s:rN/i a~, "wRVayN',vn'Le1F=•y`' y{ ~iS L ~ YC'\}^ ;J`•,-rRL~K~'l. . . . 1- r~i~~1.=~+.F1G'~ALJ.•~ti-`(ihwRw"n ~ ' `5 :r4EAyy~ ' RATIONAL FORMULA HYDROLOGY DRAINAGE BASIN ANALYSIS for 10 YEAR STORM EVENT Date: 9l16J98 Project Name: Midilome East 2nd Addrtion ' Design: kwm Projed Number: 12838 I oisk Fim a,l Uanwamrn12ase.,as Site Loption: N 1/2, S. 34, T. 25 N., R. 44 E. W.M. Basin Name: °H" Bas7n Description: 36th Avenue Pard of ConcentraUon: Sha. 6+10,1 S' left SUBAREAS: IMensity-Duration for 10-year Storm Event Oescription Aues C A'C Time Tme Intensity Incrmnt. Incrmnt. Pavement 0 037 0.90 0.033 (min.) (sec.) (in./hr) (trt *so) 5.00 300.00 3.18 . 5 300 3.18 10 600 2.24 ' 15 900 _ 1.77 20 1200 1.45 25 1500 1.21 30 1800 1.04 Total Basin Area, acres = 0.037 35 2100 0.91 Composite Runoff Caeffiaent = 0.900 qp Zqpp 0,82 Combined (Area' Rurtoff Coefficient) = 0.033 45 2700 0.74 50 3000 0.68 55 3300 0.64 60 3600 0 61 TIME OF CONCENTRATION (minutes): ' 65 3900 0.60 70 4200 0.58 Tc (ovedand flow) Tc (gutterflow) 75 4500 0.56 80 4800 0.53 Ct = 0.15 L2 = 90 85 5100 0.52 Z1 = 36 90 5400 0.50 L1(A) = 18 Z2 = 0.167 95 5700 0.49 N(A) = 0.016 B= 0 100 gppp 048 S(A) = 0.0278 n = 0.016 s = 0.0077 Tc (A) = 0.21 d = 0.08 L1(B) = 0 Tc (gut.) 1 60 N(B) = 0 Tc(A+B): 0.21 S(B) = D Tc total 5.00 IMertsity= 3.18 PEAK DISCHARGE, 10 YEAR STORM: Tc (8) = 0.0 Hold'mg 3.21 0=C•1'A= 0.11 C.F.S. Q(estimated Q d) = 0.11 c.f.s. Time af Concerttratwn = 5.00 minutes ~ H~ I I i•~ D EPT~1 OF° FLQW - y FEET ~ . 01 .ox'~. .as o+ M as a .co .3 .s .s .6 .r .e .9 La , . *77"'T" T -4-J_ f P ~ L ~ ~ ~ ! ro! I ~ ~ ~ Tr ~ I f ~ pp 1 ~ La .ia I-T Zv- 1- 1 I I ce 117 1 i 1 E 1 • ~ . o S ~ ~ i ' .04 .03 T, oz I I I ~ ~.o t aaDI5CHARGE PER FdOT OF LENG7M OF Ci]RH OpEHING ~---f---~-~ INLETS WFlEN 1NTERCEPTING !i70°Io [}F GLI"rTEiR FLOW (b) PARroaL INrERCEpTtOIV Gn RaTIO FOR fNLETS OF LEMGTH LESS THAN La i s ~ ~ ~ I~ I~..x , 0 ' r~- j --•-~--L- ~ ~--rt-~- oei a i R ~ ~ I I ~ I I 9 ~ !a _ i~a Sio .Va .Iu 4 S !.0 ~/L,a ~ CAPAG3TY OF CURe aPENinrG ,ru~ETs aN CONTPNUOUS GRAaE 6-39 FIGUFtE 16 f i r ' ` P : ` ~ - ' • ~ ' ' - • Mg38 , - M M_L v MS Sf4 5 T 'Zml) AlDDl'T IDN _ - - • - - - 5 t- L+6 CA~-Cu ~ikls - - ' l~wM ~ - - - - - - _ 1FAaI RJ (54~~~~5~} t (1?~~~ (5v'~ ~ 33,1l5 d,7'Z ~cre ~i~~iAL _ lk ~ - WnaAlAwr% Drive, 11 vt 2*5o $a 4-6, F i-e = 13,z~+G ~i~r.2 a.3~~4 ~►cr~ Z IN, l~v o F S s ~~{C-~' ac►re- 1►~,~ r~Rv a~ u 5 12,6$9 fi.~ ~ 0.7.913 a~re ~❑~r~S~~C~ rt~rea c.o~si'dered he5li3i6le. ~ctr►d' inr-1kae.a w5 rle-,qe.la?eA. orns~~e. o.r~o.. `/z. t'~~ ~ s5z f~.3 ~ tz . ~~v3 ~~riv► ~ ~ g ~4`~ ~~t• ~ 1 S►v%51e- Sarre.1 'D►r)well Js ou-0 - - x ~ i ~ • r 7~G 549 I ~l ^ J 1-2-S3 ~ ~ I~WM , a 2 v 8 5 v~ ~ $A~ tt~ ~'AV Em 5. tA-v ,-N F, e A S~vRAG~ . 5T ~t~AG ~ P'VAILk B LE ~ ~ = ~ ~.`~4~~~~'~'~ ~ ~9~ ~~a. 3~ ~~~~~~•9~ `'j lll a (g~~(~~') ~ ~,~~r~ F~~ ~ r.' ( v~ ~~~•~'3 ~ 3 t l 4 F~-~ ~ ~ 7w ~'F. ~ ~2.5~`~~►B`~ ~ 4,53~ ~T~ L'~~'i ~i-J L=~~`j~t•`~8 FT`~ l3~ 3 { l _ 3 °l2 rr T ~ 3 ~ ~ i ~,54 ~f ~ 1.~ $ ~T.~~j I 1 1 ~ ~-Tz )(►,gs Ao v VIr.' ~~t • z,-s t~ ~-r? 9-1 F~•~ -3,0 F~~ 17-5 ~ ~t5.'i~'~~1•`~S F~~'~ - ~1 ~-r." ~ "f''~ ~l•"~$ ~'r.i~ ~ ! 4 F~.~ f~-~ Tz9 r~.~ r ~ 7 ~A t7 Nr fG ~ IA 5~ ~ f'~► ~l'~ ~ YI l O N IMAkNAGS C-ALCQLA-~IONS . P IW - - - - _ _ - - . . _ 13' - ~~.s~m~,v►~ - - - - ~ - - ~ - - _ ~ ~ - _ . " lp~.- - - - - - - - - -J I $.5' - ~ I,~' _ - _ ~ . • ~~e Dy-:v . D~ ~ ~n~- - [l Ol~~- F~~ IFT• ~r' [ . . I • . ' a - . _ . . , ^ . , . , ~ ` a p • ~E'. . ° r. . i'_ . . t 1 ~ ~ • y _ . - ~.1~~ _ , ` , r-T.pA~~1~ 0,~ e. C vrc. C _Cra~~m_Sec~i~~~~ f?~~e0,__a~__ayvcx~ f---------__ . _~.~.t___ ; ~ ~t,~"- - _ - - ~r,rr; ~ -~z~~~•~J1~.2~] ~ ^~(p.S~,l~3.~O4} l.'~~ ' _ ^ 1 3.GS ~ ~ 1_G°~ • - - 0.`i1 ~ - - - .YY_ ..~~~Y ~ f7lS..°_Y41£Y1A~_ - - - - - ' _ _ Df ~t IV~W0.1~ - ° ; ~ _ . - 0.0 _ . t a a ' a t e - - . ,3 . ~ - ~ ~ ' • ~ . • f 5 . Ii+iiL'i~;_e~,r,.E,: ~;ir! ' ' • i n n~ I 2 7 ' ~ , ~ ' ~ • _ _ _ - D l ~ ~ 7 ~ ~ - t r .~,~`,~~.--7 r ~ - 1 :a F ~ 1 . ~ _'~f k- w ~Cro5s - S ec:t;ono,l ~re.A o' Sw at~ I - _ - - '2.'q~ ?z3.55- T4, _..8 ~ ~~c ~ ~ . ► ~~:~F~ ~ ' -••-•r•• ° - • • - • - - • • • ° • - • _ - _ _ AM? ~ C DETENTION B'S~ OESIGN. fXS~ FORMULA fl T L+SiO.~] 8[ BOWS[ 1°UNtr AAETHOO DRMNAGE 8ASIN ANRLYSIS fbr 10 YEAR STORM EVENT Date: 8118I98 Rr~t Naurva: NFiditGme EWt 2r►d Add'tiDrl .k6 Mo.: 12838 Prapd LocafKm: N 111, S. 34, T. 25 N.. R. 44 E. W.M. Gtesigner K. MCluIl1E.1QN E]rairrage 983in NWKL "`r Disk [3ir.: Al:tawstring Lhshmp Bau+ C1ascriPtion: QnsTfs Fs'Wmma' 1283$ada 'ZOS' Paridft Aiaa IVams: awrafe Far. Tom[imen Pord7re9 Area Locsbm, saulh smia+of 36th Aversue Point of Concentradon: 5tL 5+08 50. RL SUaARE,AS T]ME t7F COPJCEhITRA7'tOd {Tc), mirtubas C7escntriia+ Acres C A'C Ove'laM Fkw Channel Flow dmaMnpus -208'Areas: ~16= L2= 418 11sphalt P~vsrne~tt 0.3D4 0.97 0274 at= 0.15 Z1 = 7.3 Roais 0.000 0m 0.ODD C1 (A) ° 0 Z2 = 8.6 privervays 0.161 oJ9p 0.145 N(A) ° 0.4 S= Q Graw lawm 0291 0.15 0.444 5(A] " ❑ Qi n= 0.03 Tc (A] A 0.0D sz 0.0094 QderArea~: d = 0.351 ~m~rt B: L1 (13) ° Q Tc {ch ] 4.63 N(B) = a Tc(A+g) ° OAa sO = 0 rC total s oa Tc (a) = 0.0 kdortsdy = 3.18 FoW Basin Area. acrss p 0.756 Cormprsda Runoff Co&ftienf ~ 0.81 Cambined {Aaea ' Rumtf C.affcientl = 0.462 Q 4esfimated ~ d1 ° f.47 c.f.s. Time of Concentration a 5.00 miewtss '208' D!r'AINAGE PARf4Mt I'ER5 ~ '?08' Pmmmwd Area ~ 13248 sq. R PEAK Dt3CHARliE. 10 YEIIR 5YQRH1 '208' Volsuree Provided = 729 cv. tL af ir depVt SGorm Shvge ProvKied - 724 cu. ft at Er depth q=C' I' 14 s 1.47 C.F.S. $MSTRM CAl.CL[1.A1'KM a ik A Idf,]MHER srtd TYPE sf DRYWELLS PRDPOSF~ Time Tfine inlansY 0 drnr. !f ire IF uui aEarw h►crmrTL Iramr►t t 5ingle-Sarrei (5pokm CourdyTypa A) [min.) fA{dCs) icu. }ky ~!t? (pi- ft) 8 []wa~le-Bu~! (5pclcane Gwnt1► TYpa B) ° ~s 1~'a ~ Q►dflaw pr&Aded: 0.3 c.ts. a iifG ,t-% i-ri gm gj 6ur 44 Go0 224 1.03 777 180 547 15 900 1.77 0_82 81s 230 a49 20 1200 1.45 097 872 38'} 512 25 1900 1.21 0.56 8gs 45fl 448 '2W 1'FtEAi'AAENT VO.WME 30 1$00 1.{]4 0 4B 814 540 374 35 2100 8.91 0.42 926 830 296 Required GPA pondinp wodwrre: 40 2400 Qm 0.38 948 720 228 1mPer+i+aus `ZWArea x 1ira 552 cu. Tt 45 2700 0.74 0.34 958 810 14B vdwne Fmvkw at Er depfh' 729 cu R 50 30C1B 0.68 0.31 975 900 75 (Wll 55 33M 0.64 0.30 SIX#B 990 18 80 3600 0.81 028 1%3 1080 37 65 3900 0.6O 028 1109 1170 .61 70 42M 0.55 0.27 1153 12EU •107 75 45DQ Dm 0.28 a f a1 13..0 .159 570RH! STORAGE V'OEUkSE S[1 4803 0.53 0.24 1200 1440 -240 Es 5100 a.SZ' 0.24 1250 1530 •ew M1daK4r1un ~cxape re4u+red s 549 cu. R 90 5400 O' 023 1271 1820 -w vvhmne pr&rjded at 8' dept!'t ° 729 ct,t_ !i 95 sm 0.49 . 0.23 1313 1710 -197 OKI 100 Bt)QO 0.48 0.22 1353 'isw -447 sLrnpwr+ Enmn+wwl !M 9tl9lffarfhArganmRbe4 SpQkw1% WA 99212 fSM 926-13n e'~ } n'~, ~RR:R lr ' ~ x y.,!;'Y},,-.. q Y,~--- , „ Y'~"`~ . . . ^°Y 'e~~~a.,...j_ . ' _ . StiJT7I1WatCr DTa1118ge Repf]rL H. ST(]~~~~ ~~AG~ CALCULxtiATIQNs: (CC]Ilt]I7t1ed) BS81'!1 Z • Gurb Onening at Low Point, Sta. 5+{}6.28, right, 36`h Avenue Curb Inlet #9 h= 8 in. =0 67 ft. Total height af opening H = 4 48 ft. Depth of water at entrance - Q=0. 11 cfs Tatal peak rate Qf flow Q= 3.087(L.)(H)31'2 for Hih c 1, D 0810.67 =O.1? e 1 L = fl = (3.087)(H)3.. = D.1 1 = (3.487)(0.0$}3" = 1.58 ft. Constntct Cusb Opening; 3 ft. vvide, 8 in. deep RAnoNAr_ FvRMuLA ~DROLaGr DRAINAGE BAS1N AN,FhLYS6S for 10 YE41R S74FtM EIAEIVT [7ale: 9uI51s9 Prrjeck Name: RAidi[ame East 2nd Addftn De:agn: kwm Prqed N+smber. 1 2838 , rask Flm ni Uz=mniahy5ite Locabtn: N 1fz S. 34, T. 25 N. R 44 E.W.N1. Basin Name: °1" 8asin Oescriphvn 36tts Avenue FQmt af ConcertraGorr• 5la. 5-+06 28. 38' Right SUBAREAS: Infensrty-Durasian far 40G-ve'ar 5tcum Event Qescnp3rcm Acres C A'C Time Time Intensdy Incrmnt Irscrmnt. Paverrsent 0038 0.90 0.034 (min ) {sec } (in.lhr) t#rsot 500 30000 3.18 5 3Dp 3.18 10 600 224 15 900 177 24] 1200 1.45 25 1500 1.21 3[] 1800 1 04 Tctai 6asin Area, acres [].G38 35 2100 0.91 Ccamposite F urxrff C,oefficient y 0.900 40 2400 0.82 Corntuned (Area ' Ruriotf ioeffWwrt) = 0.0k34 45 2700 0.74 50 30DO {].66 55 3301 464 6d1 3600 0.61 T1ME OF CONCENl"RATIOIV (rrtnrutes): 65 3900 0.60 70 42DD 0 58 Ta (averfa►rd flow) Tc (gu[ter flow) 75 4515@ 0.56 80 4BOO Q.5:3 Ct = 0.15 L2 ~ 58 85 5100 0.52 Zi ~ 36 90 54170 050 t1 (A) = 18 Z2= 0.167 95 5700 0.49 N(A) = 0,016 g= o 100 6ow 0.48 s(a} = 0.0278 n= o.ai s S = o.oor7 Tc (A) _ ❑ 21 d = 0.08 L1(8) = 0 7C {gut.) 1.03 N(B) = 0 Tc(A+8) 0.21 S(8) = 0 Tc to4[ 5.00 lnte~= 318 PFJ4K DtSCHARGE, 70 YEAR S'FORIN: - Tc (B) 0.0 HsidirV 2.07 Q a C• I*II = 0.11 C.FS. a tesfimated @ ey = o a l e r.s. Tirroe rs4 Cancentraban = 5.00 mmutss , ~ ~ ;~.~Y~ =`~ic~~~^"`' evn.~•a:,;':ao^%~^i~ ~.5r`:•.+%r~:~i'~^'r>+~::.~p_ +I~s~sl4fi+~ , - ".l"~r `51L: :S Q` ~ ui: ~ "~@ :q~'F'FY•qPf~~!.. c~k e 3.M1~tT~~ -r. ~ ~si xi' a° . ~ ~ D?A11~t~~~ 3zt ot)o ft.-L oil$ ~d Z#5v r z 3 # (137: )(I9`) r P.l S6S a~cre 1000 T , ~ VI"V F-5 1ooo ''d '~?,~~~'D A.CIr@„ %1\3(o + z,oloQ + s~~o~o ~ e5,136 0.3+1S -3Z,~~d - is 1134. z v .S'a -1 1 act-~ ~~r~~~~. CUhSE~~~~~ ~e~1;~~~~~., ~~a ;~~►~,a~~ d~a~~~~~a ~+n~+'ke ~rreo►. ~Ta~rhC~,E ~~{R11~"4~ED : 4 -3 -39 ~ ~ rs`ht ~ ~ ~ z +vt4~ ~ 4~ D 2 ~r ~ ~ i r.~ ~ e. ~aLY^ r ~ t l~i ~ Vu ~ ~ ~ (0.3 C45 a u+) ~';wv.,~~ . 5~ i ~ ~5 ! ~ ~ . - - - - - - - ~ 1A1 M ~ ~ID'B u Sril~4~ $IV~I t+1 'QM F-M F-tl'f F- A 5-TvIFAGF- S~~LtA~.E A%1AfL.ASLE '-aw QA. -T J7 ~ 4$ ~ = 3,°I(~v F~? ~~~.,t'~~'►.aS i~ = AQ 3 ~ ~ ~ ~,58~ F~~ Z~ ~ ~~t•~ ~4~ ~i~~ a s. ~1-3 3 ~ C> f 3 ` 13 6 FT-'L 3~ v tT 3 xweM ~ ~ 'D 1LVMr= _ ~ASYI _ 7-t4D _ND'D lT_lC) N_.__ $-3 $ - 1 . p-'RI'►INAGF_ CALCu LATtiON$ : ~ ~ . _ - - - -s------ - ~1w - _ - - - . ~ . _ .t3' ~o.s~r~.~r~t_~-.__._ . . ~ ~ - - - - - _ _ _ . k-- ~.5~ • I.~~ - - _ ~ - . ~ -e - 0-i. ►~7~i~ewa►~.---- - - - - ~ ~ _ 1_'-_._ i , io~7 [3.Sal6'~•-~T.lFT. . 1 ~ . . . a 1 . ~ . ~ ` • Y ' r ~ • + 'f . o ~ 4 L • ' ~ . . ~ ' l 1,• -N nr ' FT. ~ p,l3~13 - - - - p._ _ ~ w l S r'[q ~ e...5 I e C an t . - P - ~C ur'~o - - - Swal~. ~v~`~ow+~ - - - ~ - - • ~ ~ _ '8. ~ _ --_7-_ ~~.~C6•~~1C~.z~] ~ ( z~(o.~~~-~,~~} ~ ~ 777_N_~_z, ' 4.z9`~ v.Cil . - - °'-/r6 ~ ' _ - - - ~ - _ _ - - - - - - . • ~ ~ - sc -ON~. ~rq - - 77'___. - ~ . _ l~' - - _ - J- A g.~`- - - - , ti.5` - ~ - - - -[oP o~ Dri~~,w~ - `-r - A- tf►~.tr►+y,~~j~~,,y~ y~~,,~ a ' ^ .v 67 00 o r~~i ~ , . P +e 1 ■ . L ' a - • ~ - ~y] r ' ~ 4 ~ ~ ' a 8 . ~ L • ~~~1, :I~r, ~ ' ~ ~ ~e~ • ~ ! p 1 ■ , '•V ~ S , y ' ` 3 ' . " ~ ~T•IF.T.--~ - - .~~v5°~~-- - ~ Can~, e Srope rs_ _ ~O'r'c orn~ _ _ _ _ - - - - , - - - • ` _ . ~ _ r 'o .-Gro g5 - ~ p_ (-_t~ o,r,Al o.~~~~.2~~ 5~j (1.R3) (J.a) L ~ o lPC7 _ ' ~ I . _ _ p~ - • ~ • • ° p, c~ v ~ - . . _ _ - - • ___._--_'~.'S5. rC-~Z o. N• --r r„~ ~F."' re ~ F~ s '"r - - - w • • ' _ f--v - • , _ QETENTiON BRSflJ flE5IG3+l. FdRTK3NAL F{]FtIIAAUG4 FEYQ[iQLCGY 8. Bt3WSTRlNG N1ETHOE1 DFL4fNACE BPSiN ATIA{.YSiu [or 10 YEAft STORM EIJEIJT 8118J98 Prnjed Marrte: h+lidilorre East 2nd 1lddihaM .lob hlo.: 92838 Pra{ecC Lorahon' iJ '@R, 5 34. T" ~'a M.. R 44 E_ W M. DeSigr►er. IK. MCMUEl4N Dremage 8astn Nams: "a" Disk Dr : A1:16mvstnn9 iQra[nage Basin DescvsPbon- [hssde - FWmsaa. 1 Z838-,ds '208' Pondlng Are-a IVame: swale for Tan[imon Farniing Rrea tocshon eas[ side of Varder Rd. Pwrrt of Cancerttradors: 5ta 26+Q0. ftt SClSRREAS T[ME OF CI7MCEMTE3A7iClM (Tc), minubas pesaptlon Rcaes C A'C [3verland Faw Channel Flow ~Dary.imig '2a8' Areas; SertrMf h: L.2 = 258 Asphatt RavemerrE 0.187 090 0.186 Ct= 0.15 Z1 ~ 7.3 Raofs 0.114 [d 96 0.103 t1 {A) = f] Y2 a 8.6 priveways aoas 090 a041 N(A) = 04 a a o ~mw Lawn o.ss7 ois 0.058, S(A) - 0.01 n = a im Tc (A) = 0.00 5 _ 00078 gjhe, nreas- a~ ~ o.~s ~e- L, (s) = a rc [ch.) 3.25 N(B) ° O TCUA*By = 0 00 S(B) = 0 Tc toffiI 5.00 Tc = 0.0 Intensrfy = 318 Toa1 Basin JUma, acres = 6.734 Camposrts Runoff Coefficient 4 0.50 Cambired (Am' Rurtoff Ccefticiertt3 ° O.370 0 {esbRra6ad @ d} ~ 1.18 c.fs. Tfrrre df Ccncentration ~ 5.O4 rmnertes `20$' []RAINAGE PARAMETERS '208' Pavernsrttllrea - 8136 sq, ft. , F+FAK C315CHA4iGE. 1a 1fEAR STORM '20$' Vvttune Prvnrided = 454 cu. ft at 6' depBt 5krre Staraga Pmvedsd = 454 ru. ft at 8' depth QcC' 9' A= 1.18 C.F.S. BOWSTsRIlJG CALC47LATit]NS A vz aks id EJiJMBER and TVPE aT ORYVtlE4_LS PR0PO.fiEO Tirne Time lamrmiV ❑ dev. V in lf aut Seorap friurnnt Inerresni t Sir►gla6arrel (Spokane CountSt 3YPB A) (mm.) {sec.) inlhr] (ds) {¢u. tt) {w. ft,} {r,U ti} fl Doubla-8arre! (SPa'lana Cotrffy TYPo B) ~ ,y [A'~ "n e73 Qu}Row Providsd: 03 c.is. a :3m J~Fi M 473 a JU 10 600 124 am 592 1SO 402 15 900 1.77 4.66 656 ZlQ 388 20 7200 1 45 0.54 899 36a 339 15 7500 121 0.45 717 458 2$7 '208'TFtEATFAE3dT Vt3LltME 30 1800 1.09 0.38 732 540 192 35 2100 0_91 [7.34 742 634 112 Rewretl G.PA. porrdlrtg volume: 40 2+100 0.82 030 359 720 39 Impennoug 2WArea x lfz' a 339 cu. R 45 2700 0 74 0.27 787 810 -43 tolume RmMed aT G depth ~ 454 cau. ft 50 3000 9.68 425 781 900 -119 ❑Kf 55 33OU 064 0-24 806 990 -184 eo 36oo 0.61 0.23 836 lnsn -244 65 ssao 060 o~ ~ 1170 •Zsl 70 4200 0.58 021 923 1260 -337 rs 4500 056 0.21 954 13sa -396 staRnn s:oRAGE vatunnE 80 46oo 053 ezo ssz 1440 -478 85 5100 0 52 4.19 1001 1530 -529 Mawmu[n stmge reGwred = 402 cu. lt 90 5440 050 0.19 1018 1620 4302 vWWurrre pmMei at 8' depth ~ 454 cu. ft 95 5700 0.48 0.18 1052 1110 4358 - OIS! 700 m00 0.48 Ot8 1484 18fJA -716 S1'tnpsorr Engltm-"A lrrc. go Norb+►1tgonm +Rc94 5pakwp% WA 99212 (30) .9Y&-i32T , ;Ln:.G,,~ t,• , T'. ~ :~.4 -,.^..r_R'S. .r.. y i~ • ie Yti. J4'4° ~ c,+'~ ~ ; r 'aLS a: . i "t$°°i'~''. ~ , . . .r,. ti ~ * StDI131WatCr DI'ainage RepQrt H. ~~~RMWA~ DRAINAGE CALCULATIONS. (CDntLL'111L''d) Ba3ill J Curb C]nenine at Low Peint, Sta. 26+00, right, Vercier 1]rive Curb Wet #10 h= 8 in. = 0.67ft. Total height of opening H= 0.117 f#. Depth pf watcr a[ entrance Q~ 0.34 cfs Tatal peak rate af flow Q= 3.087(i-)(H)32 for Hih < l, 0, 117J0.67 = D.18 < 1 L = Q = (3.087)"3"2 = 0.34 = (3.087)(0.117)32 = 2.75 ft. Construct Curb Opening, 3 ft. wide, 8 in. deep , . _ " '4" fZATfC]IdAL FORMULA HYDRflLOGY DRAIPPAGE 6A51N AJALYSlS far itF'fEAR STORM EVENT Date: 911sm Pmpct Narrte: VUtidibrne East 2mi Additior~ Desgn- kwm Presped Numter 12538 oisk Fit& a1•Vabormm002MAs Sde l.acatiran: N 1f2, S. 34, T25 N, ft. 44 E. WI.M. • 8asin hfame: J. Bas,in De.scnp#iQn: Vercler Dmfe PocrR of Conoentahm: 51a 26+00, 1 S' R'sgM SU9AREA5 rrrtensiit+-Ouratiorr fw 10-Yeae Sturrrr EvenC []escnpden Acres C A'C Tsme Time frriensdy Inc,rnnt fncrmn#. Pavement ❑ 11 S 090 0 1135 {min.} {sec } [inJhr) tM -a 5.00 30000 3.1$ 5 300 3.18 14 600 224 15 900 177 2{} 1200 1.45 25 f5w 1.21 30 78o0 1.04 Total Basan ,Area, act = 0.118 35 2100 4.91 Compwite RunaFf C.oeffiaent = 0900 40 2400 0.82 Cornbiroed {Are-a ' Runoff Coefficient} = 0.106 45 2700 0.74 50 30OD 0 68 55 3300 ~ 0 64 60 3600 061 TfME f7F CDNCENTRA'ffON {minutes}• 65 39M 0.60 7D 4200 0.58 Te {overfsnd flaw} Tc (gueter flaw) TS 4500 0.56 et) 4800 053 Ct = 0.15 L2= 107 85 5100 0.52 zi = 36 sa 5400 0.50 Ei (A) ~ 18 7-2 = 0.167 95 5700 0.49 N(A) = 0.016 g= ❑ 100 6000 0.48 S(A) = 0.0278 n= D.01 fi s = 0 f19 Tc (R) = 0.21 d ~ 0.977 L1(B) = Q Tc (gut.) 1 30 h1(8) _ 0 TcjA+By • 0.21 5(B) = U Tc tatsl S.QQ ' Irrtensaiy 198 PEAK BISCNA'Rt3'€, 14 YEAR STQRM: Tc (s) = 00 Holding 3.81 Qg C' I* A= 0.34 C,F.S. 0 (p s' @ d) = 0,34 c.f.s. irre ot' Concentafim ~ 5.00 mirsutes ~ , : ~ y7,~y iwY-.i^ ~ c . ►Z'~38 _M1Dll.oME _ _~AST ZKD A~D171oN S~Z6tqg DRAONAGE GALcuL.A7toNS . BAs~N " K" AR~P ?bTAL 2~SS'~~ZBI~~ z 1 S~l 85 f~.Z 0.3 ~Z4 acrn ~ QP~.~ , Z ~1erc~er Dr~ve :~2~i~(\~`~ ~ 4,8qG f~? 0.1\24 Acre 3 D~~ves @ I,OOO ft? : 31oob 0.0689 acre- De A goo~s Z 0 ft.Z ft.Z O.IIq3 acre A IMPERVIoUS ` B 9G 3~ovo o Z 5,196 ~ 6R~SS L lS,165- 5,~96 Z~0~5Sq f+? o.Z43I acre p~ Of~s~te o.reo, coha;~er~~ hegl~9~b~e , awl ihclw~e.A as "develope.d ohsi~e areo►. S TpgA~,E REQUtRED : 0.~ "20~" S-tora9e = ~4,89G f+~~ ~2 ~ Z04 12 I►+. ~fT. 6) BoWS+r%,r.9 Z ~(v5 ~t3 + \ S;h91e Barre.l Drywe41 ( 0.3 cfS cu*) STOjZA6E ~RoV~pED ~Wokk 25 , 74Z 24Z zi 3 > 1~5 ;~~._~y. •d ,,,s"~w7~-'E~~iA~C ~ • . ■ . . 1L '#tZ YY• ~id''~k~'' ~•~~i ~ •~uj'i~r~45 T ~ . - . . . M1DL~aM~ ~AST AD'C~IT[oN l~$~$ ~ - - - " ~o$ Lb 51►~AL~ 'Sla ltA65 57 oi~Afs ~ f'Nft1LPSt- S ~tiS`m fi; 1`1l f 3 ~ ~{y 8 S f~z~j 1 ~ I fr~ 3 ~1$~~~~~~ ~ ~r~•~ 14 ~i•~ ~~i~~~~.98 F~~} l'LI ,~.~_3 F 1.3 M1D11 o-Ms SAS7_ 2N' ,ADIDIT_1oN ~ - - ~ • - - _ w~._.___~__ _ ` . . _ _ _ ----~lw - - ti r y ^ ~ - - _ _ F~.S~if+t'1~.'h~l___._,._,•--_-~ • - • - ~ - _ •--.m..r_ _ _ • ,~~}t - - • - E~` ' • ~.SF - ~ - • - • - _ o~ , QriV ~W~x~ . - - • • . - ~ ~ ~ - I ~ • • _ r~a - • D.DICo~-•~~•iFT. _ - 7 ~ ! ~ . n i ` r ~ • 0 ~ ~ . • . g - ' - ~ ~ F ` . . ~ . • ~a J . r -o-ti~~-~- 13:~rr~~~1 r~c•d~r~ st~ ~ . _ _ - SA Q Q vx+ c.. C.ar1v _ Swale $Ottvrr► - ~ ~ ~~5~ ~ f'~t•~s"------• - - a.5 ~ ' 0~5 ~ ~.~G~ ~ ~ ,~TZ-------- s - ° ~ ~•2`~~ 3~Gs ~ - - - - - - L - - t - - . . . fi ~ - • C" / ---r'~fi~.----~ -a'~ - 1`•-'~---------------. . . _ - • - - - - ~ ~ . - - - ~ _ - - 1~ ~5.~~r~.,v~~_..~ - _ ~ - ~ . _ . - - - ' P - _ - l c~j _ - - ~ ,,5'_ _ - i.5' - - e,~~.~.~•:;ti.~,a ! - o.o ~ m W7 _ ~ . a . a i - , ~ - . ~r y . _ _ - • , ~ ~ ~ ~ - a - . - - ~ _ . . p. ' ' ' _ ~~~^r, ~~1 e 3 • ~ ~ ^flf ~°~+~g_ ~ ' C~ ~W - . , • ` / ~ ~ 77 ~ ----_.---~--w- NFT`/FT.__ _ -,~~~.~~`3-- - Carc, wal~ 51~~~ swale- Sott~~~ _crv55 - See-Ciana\ A`re¢. SW al~, i ~ ~ - - - - - - - - - ' .~.41 yco-E 1•I~~ V. 5)1 3) L d "g . _ p'~ • - b .~T, - 7. 00 . . ~ 0~ - 3.5 5 F'( • . . _ . R' r. - _ . _ . - • - • - - _ _ - - ....r . -_.,sFs.9..... ~ .:fF~:..S~°'fFsaEwr:+~' ' - • , - .r -74T . - RETWTON BASW DE51GN: RA7K7M1fAL'FOR14[IJLA HYDRC7LOGY S Bi]WSTRING METHOI3 DRAINAd'iE W11+1 MJALYSIS Tor 10 YEAR STORM EWfENT Da6a: 81'18/98 Pcoied Name. Midilnme Easf 2nd Adddon ,ksb No 12$38 Pralect L.ocaIIon: N 112, S. 34, T. 25 N., R. 44 E. W.M. Dougner K. MCIV9LLfefPl Orainap Basin IYamw: "K" peslc Dir, . At:Ubowstring Drsinag$ 8asin DescnPban Orste FilsRama° 1 2838As 126r Pww'tv Area Plame: svvale Feu: Taml'srrsarr ihsnding Area Lordtron: wesi sade ot Verder Rd Pvirit af Cancerftifton Sto. 2$+00, il. SUBARFIIS , •7TME (3F CONCE£VTRATICIN ffel, msnutes DesrnoW Pcres G R`C Overiand FTuw Citianne{ Flaw fmoerveous la8'Aiees: _SWmertfR- L2~ 1so Rsphalt Favamartt 0.112 090 a?at Lt ffi 0.15 Z1 = 73 Raafs 0.000 0.90 0.0DO L1(A) ° ' d Z2 a 8.8 Orrv$waYa 0D69 @ 54 6 062 N(A) = 0.4 8 mm 4 Grs$s Lawm 0243 0.15 0.036 5{A} = 001 n= 0.03 Tc (A) = 0-00 s g Qa1 G1tlrErAreas: d = {F.253 ~rnerr! 8: Li (8) = a Tc (ch ) 2.15 N(B) = 6 Tr.(R+B) = 000 5(6) = 0 Tc tatal 5.00 Tc (B) _ 0.0 IrRensrtY = 318 Tcta1 Basin Area, acres = 57.424 CompossEa Rus`uSff Coefficiant = 047 Comhirred (Area ' Runoff CaefCictsrrt) a 0.200 4{esiimatiDd Q d} ° 063 c.l.s. Time nf Gorteerfbehon = 5.00 mmuEes `208' DRWNRGE PAl7RMETERS ` '2S' Pavemerit Araa = 4896 sq. t4. PERIC DCSCHARCE. 1a YFAR 5'CORM -zW vfllums Provided m 242 r-, a. as s- aeagr+ S~tm 5tnsage Providod = 242 w. R af 8' d~th Q= C' t' A= a.63 C.F.S. sawsTRi14G cA.cUuAnONs fi A ea ie ~ NUMBER and'fiYP£ ad ORYWELLS PRQPOSED ° Tsme Tima lrfiarrrstY Q dev Y in V aut Struage Irmmrrt. tncmrrt T Sin9fe-13arrei €Spokane C.ountY TyPB A? [mm ] Nac.1 fnlfsr) (cig) {w fE.) iCu. ft) [cu. tt1 0 [7ouble4jarrell (spukane Crwntv TYPe 8} {#116£1} LA'C-931 foulf~ f+~5 ~ ,~~M s~$ 6t~i 1m,i 1 ouflaw Rrovided: 0.3 cf.s. 5 im :S-n ~s 1% 86 7w ip 600 2.24 4.45 314 t8O 134 15 900 177 0.35 354 270 84 20 1200 1.45 029 337 360 17 25 1500 1.21 024 387 450 -63 '2W iREPcTMEPIT VC3Ll,iME 30 1800 S.m4 029 395 540 -145 35 2100 021 0.18 400 E30 -230 Required G.Pl~ ponding vo[ume: 40 2400 0.82 6 t8 410 720 -310 IrnPetmaus'2U8' Area x al3' = 204 cu. tL 45 27[O o.Td a.15 414 81(1 -396 valume provideclat fi" depth = 242 cu R 50 3DDQ 0 65 0.94 421 9DO -478 OI(9 55 3300 [].Sd 013 435 991 -~'i5 W 3600 061 0.1 2 451 1080 -629 65 39Q6 0.60 012 479 1370 -695 7t] 4206 8.56 [].12 498 1260 -782 75 4500 0.56 011 514 135(] -WS STORM STOFiAGE V4]LLikIE 90 4800 053 0.11 599 1444 -921 $S 5100 052 0.10 540 t530 -M Mmnmum sbma9$ ►e4uired = Tfi5 cu R 80 5400 0.50 0 t0 549 1520 -1071 vvluma prmnded M depflr $ 242 tu tt 95 5700 049 0.10 566 1714 •1142 OKI 100 6000 O.+iB 010 'S85 1sw -1215 Sknpson Er4boerl, rna sM AADrd, argonne Rba4 Spok•rna +~A 99212 (50)926-1322 . ~~'.~'•L _ ' "~'!F ~~~'~'~~-~"."a►'~' , -,.5~-:x,t ~•.'f~d~x . .~~j Stormwater Dra.inage ltegart U. STORM"V4'ATER I3RAINAGE CAL,CULATIp1+GS: (continued) Basin K Curb Ovenine at Law Paint, Sta. 26+00, teft, Vercler Drive Curb Met #Y t h= Sirt. = 0 67 ft. Total height of opening H=0.455 ft. Depth of water at entrance Q=0.0'i cfs Tatal peak rate of fiow Q= 3087(L)(f~}~'~ for H!h < l, 0.065f0 67 =0.10 < 1 L = Q = (3.087)"32 _ 0.07 (1087)(0 065)312 = 1.37 ft. Construct Curb Openang; 3 ft. wicie, 9 in. deep Ra fTAilf}NAL FORMIJCA Hi'QRQLOGY ❑R1411VAGE BA51Hi AAIALYSi$ (or 10 YFAR STORM E"VEtiT Date: 9115/ss Pmject Name: Midilonie East 2nd Pddrbvn E]esign: fmm Projed Nurrtber. 12838 Disk Ftkr A+.VatiorMnM1283a.xis 5de Locativn` N 11Z 5 34, T. 25 h1, R. 44 E. VV M Basrn Name: °K'" Basin Desmptian Verder flnve ' Poirst vi Conoentration: Sfa. 26+00, 18' ieft SUSAREAS. Iritensiry-{]u,alian far 1ayear Stnsm Event Aires C A'G Fime Tme Irrterssfty IrtcrrrErit. Incrmnt. pavement 0.425 O.90 0.023 (tnm,) (sec,) {in.lhr} (f"M 5.[]0 300.00 3.18 5 300 3.18 10 6l0 2.24 15 9[0 1.77 20 t 20D 1 45 25 1500 9.21 30 1800 104 ToW Basin Area, acres = 0.025 35 2100 0 91 Cvmpasite Rurroff C,Qefkk4tt = 0 900 40 2400 082 C,ornbmad (Area ' RuroffCaeffiraerd)= 0.023 45 2700 ❑T4 50 3000 0.68 55 3300 " 0.64 60 3600 061 TihAE t7F COtiCENTRi4ilDM iminutesl: 65 3900 d.~ 70 4200 0.58 Tc (overlsnd ffow) ]'c {gut#er flo►v) 75 4500 0,56 so 4$Ot] 053 Ct = 0.15 L2 = 41 85 5100 0.52 L1 = 36 90 5400 5(} L1 (A) = 18 z2 a 0.167 95 5700 0.49 N(14) _ 0016 6= Q 100 6000 0 48 stAy = 0.0778 n = 0.016 s = 001 Tc (A) = 021 d = a.065 l.l (B) = ❑ Tc (guf•) ❑ 73 N4B1 = d ~o(A+B) 0.21 S(B) 0 Te totaf 500 fntensaty = 3.18 PE11K DISCH14RGE, 44 YFJAR STOFtM: Tc (8) ~ 0.0 F#owim 1.46 - Q=C • I • A = 0.07 C.F.S. 0 (estfrrated @ d) = 0.47 e.f s. Tme ot Conoentration = 5.00 m:nutes ~ y~;"'~""`.`~3~" , _ • - ' , - c~ID1Lvm~ SAsT ~WDITIoN Il ~ 3 ~~~~r~~ ? ~7~.AlNA~E C141~CULR~Clo~1$ Y,NN M l~a~~ ~ ~s cwlk►~ ~~~A . l4TAL 7 ~vYC) ~-133 o, c- r~ A DvLkvss z ~ VOµSP-5 @ ~ \4,,[?DO 0,303 0.ms^e House- 4c r e ~ GF~F►.~s 'z $1v+'000 atre_ n ~-om V► W Tlr~e- lvsk z►Te- -V1\av, v\v c]rA1tinm3,L ~oc►liii es o~rlt- ~otvkne-~ fasr ~ ,•sas •r - -wq - - ~,c- ~,r ~l! .a-.ry„ '+s~,,~- ~i~i.~au~~r. • f _t ~ ~ ~ ~ i+ f ~ , ~ . ~ r ~ - 10 ~ Q ~ - - _ ~y~ ..1~.'. '~~7 "m` ` q~ e' Ui A , 50' ¢7' L-24 L-,a 5 0 opts ~ a I L~ i ~ ~ry ~ . ~ f I I ~ 5 1J - ~ ~h ~ J X2 L-a33' e- . uilding 5ettaock M. 910 ~ CAL S : l - 1(]{~ ~ ~ ~ ~ LO 2 r~ co 25. A ~ ~ , 1 S c]' , ~ 17' ~ ~ LO co ~I 4 6 T ~ ~ O LU t' ,14~ ~ ~ , 9D' 1., ~ ~ -n So r ~y o• ~ll---~ w~ /Z, 79' 0 8p.0 17~ ~ ~ l ~ . ~ Buiidi Setba ~s 118' o I f r ~ ~ ~ ~ 'cv r ~ - t ~ ~t~ ~ ~ ~ ~ 1 y 0- 80. / t co $p t11 P~ ~ ~ ~ y ~ I Lo g Ln P !L.' ~0 0~ ~ j ~ • Y ~ 10 co ry8-- $I}CE PAT ~f-'•-L4 ~ ~~`a ?9i 80' ~ 8[3r 98~ O',/ . ky f ~ ~ . ~ u-, CY ~ 73' _ 80 8D' 84 ~i__ ~R_-.__ r ~ ~ - - _ _ B~silc#ing 5etback 25 25'~° ~ ~ 4P 5 ~ r r. r 6 I ~ in _d 5~,-:~.~'1' ;9~` I scS' ~/I f 1 sa' J I s€~' I aa' i so' NBa :5 3'1 ~ °w ~ I , ~ ~ i 1 ~ ~ . ~ r . ' _ . k' . , ' "y-' ' m . . ~ . . . ^ _ , _ _.I . RA7TOf 'VAL FQRMUlA FfYDRaLaGY ❑RAfPfAGE BASiN ANALYSIS for 50 YEAR STQRhA EVENT ❑a[e• 8r1719e Prcyect Name: Middnme East 2nd Addban Oesigrr: 9cwm Projed Ntrrrsber: 12M8 Dmk R& ni Vw=Mn1an12Ma.)dS Sde Loca#rQn AI 1C2, S. 34, T. 25 N, R_ 44 E. W.M Basin IVame. "L" 8awn [?escnpiirum Posf Developrrsen! Pasnt oF Concernrabon• Nane SfJBAREkS IntensdY-Durabon far 30-Year 5tcum Event pescnp4on Acres C A'C rirrse Time Interasity Encrmnt Irscrmnt. Cirass Lawn 1 506 15 0226 (min ) (sec.) {in Ihr} Nouse Roo#s 0.367 090 0.331 twm 5.94 35645 4 32 5 30(l 4 58 10 600 320 15 9DO 2.47 2f3 1200 1 98 25 1500 1.67 30 1 800 1.46 ToW E3asin Ama, acres = 1.873 35 2100 9.30 Corrlpc;srte Runoff CoeffiCietlt ~ 0.297 40 2401) 1.18 Combirted (Area " Runa(f Caeffscieed} = 0.556 45 2700 1.07 50 30Ot] 1.40 55 3300 0.92 60 3600 087 TIME iJF CONCENTRAiIOEd (rtrrrsutes) 65 3900 D.S'Z 70 4Z(7D 0.80 7c (c+verland ffow) Tc (guftr ffaw) 75 45OQ 077 80 4800 0.75 Ct = 0.15 L2 = 0 85 5100 {3.►~ Zl = 0 90 5400 010 L1 (A) = 120 I.2 = 0 95 570(] 0.69 N(A) = 0.5 a= a 100 ema o.s, S(A) = 00:3 n = ❑ 5= a T`c (A) = 5 94 d = 0 Lt(Q) = 0 Tc (gut•) (i•OD N(B) = 0 Tc(A+B) : 5.94 S(8) - 0 Tc tow 5.94 InUnsty = 4 32 REAIC DISGHRRGE, 10 YFAR 3TaRM: Tc (8) = 00 Hnldirg 0.00 Q=C•I•Aa 24a C.F.S. Q{estimated @ d} = 0.00 c.fi s. ll~inie crf Cormentraton = 5.94 mjnutes ua~o y,j'p y ~ ~ ~ . " r.~.. .a'?. ' d~.x~,e:.:.~ a ,a • , S-. . °*'_^-r ` ` _ f RATfiJNAL FGRMUEA F['(DROLOGY ,t BASIN flNHl YSiS fa^ So YEAFt STQRM EIlEMT 'M ElIENT Project Name: MKhkm East ?nd Rddtvn st 2nd Addrtion Project t+ffurs6er; 12838 T. 25 R. a4 f W.M S~#e Loc~on: ~1 afZ S. 34, T~i ~1., R. 44 E. W.M. *-Developrrtent Bssin Descrtpticsn: Past Develapment PvirrE of Concertabon- Nmm Dne Intenso-Ousat►on for 1t4ear Storm Event tensdY-Du►abon far 1 0-year 5torm Event C A'C Tirrse rrrse Iritsnsdy Trrte Ttme Iritensrty fncrmnt Incrmrst lncrmnt Incrmnt. 0.15 0.226 (min.) (sec ) {in./hr) {min } {sec } {in !hr} 7.90 0.331 (o+•sat wr*w 594 35645 4.32 9.8(} 588.29 3 25 S 300 4.58 5 300 4 58 10 600 3 20 10 600 3.20 15 9(R} Z47 95 900 2.47 20 12{b 198 ' 20 1200 1,98 25 15DO 167 25 15iQ 1.67 3(} 1800 146 30 4800 7.96 215 2100 130 35 2100 1 30 0.297 40 2400 1.18 40 2400 118 0.556 45 2700 1.07 1 45 2700 1.07 50 3[300 1 00 , a0 3100 100 55 3300 0.92 E 55 3300 092 60 3600 0.87 ~ 60 36D0 0.87 r S)• 65 3900 0.82 ~ 65 3900 0.82 ~ 70 4200 0.8(} ' 70 420a 0.60 ruaer Nowj 75 45M fl TJ 75 4500 017 80 48M 0.75 8t] 4800 ❑?5 Q 85 5100 0 72 85 5100 0.72 0 90 54[)0 4 7d 90 5400 070 - 0 95 5700 069 95 5700 41.69 Q 100 6000 067 tao 6000 0.67 0 0 0 ~ 000 y 5-9+ 5.s4 HARGE, 10 rEAR sTdRM: i: 4.32 PE,11# F5i5C1i11kZGE, ia YEAR STQRM: 000 Q=C'['ELz ZA0 C.F.S. =C*I*A= 4.964 C.F.S. n-f s, inutes +_rc~ai _ ' " . " ' . ' ..e w'.'L'S'r a "~q : fi. " _ r ' _ • - • _ - r _ ' _ " , • _ " ' . ` _ ' " ' ' ` T • ' • • - J , ' , R4T1C]NAL FORMEILA HY[7RL]LC]GY C1RAlAfAGE BR51[d AIVALYSIS for ia YEAR STORM EVENT Date. 8117198 Prolect Nsme' Midiltune East 2nd flddrhon [?esegn. kwm PRed Nusnher. 12835 ocik R& ,ai.v"0nn1W2&38A1S Sde Location' N 1a 5. 34, T2a N., R. 44 E. W.M Basin Name. L. Basin Descnphan- Post E?eveiapmern Rcunt af Cnnc,errtra#on: None SUBAREAS: Iritensrtv-D urdtton for 10-Ye"ar Storm Eweest Qescnphan Aaes C A"C Time rune Intenssty IncrmnC Incrrrint. Grass Lawn 1.506 0,15 0.226 {min } (sec) [mJhr) Hause Rcaofs 0367 0.9(} ❑ 33i [n'so) 5.94 356.45 3 00 a 300 318 10 6DO 2_24 15 900 177 20 1 2Dd 1.4a 25 95f1Q 1.21 30 1800 1.44 7at'al Basin fVea, acres = 1 873 35 2100 0.91 Comprste Rurtuff Caefiaent = 0.297 40 2400 0.82 Conbirsed (Area ' Runvfi Cesefftaern) = ❑.556 4:5 2700 0.74 50 3000 (1.fi8 55 3300 0 64 60 3600 061 TiME flF Ct3NCEAlTRAT3Old frrsinutes): 55 3900 0.60 70 42DO 058 7'c (oveafend Row) Tc (gertter tlnw) 75 4500 056 80 48M 053 C! = 015 L2 = d 85 5100 0.52 Zl = 0 9[) 5400 0.50 LS [R] = 12(] Z2= a 95 SIQQ 0.49 N(A) _ 0.5 B= 0 100 6000 0.48 S(A) = 0.077 n = 0 s= 0 Tc (A) = 5.94 d = 0 L1 (B) = 0 Tc (gut ) 0•DO AI(8) = 0 Te(Pl+B) 5.94 s{B} = 0 Te t€rai 5.94 Irrtensity = 3.00 PEAI{ D18CMARGE. 'ta YEAR 9YORM: Tc (8) = 0.0 Hoidirog 8 00 Q=C* I* A= 1.87 C.F.S. ❑ (estirrated @d) = 0.00 c.fs. Tirrae of Concentraflnn = 5.94 rrsineAes i . LPQStI _ ;..:~t~..~ "ArrErw'~ pc~ ,r'wr.7+ u• r er xr«.:~v-•- ~ r ~ d7'~~°' Sf.1"..e ~ .np.!• i - . l R4T9CiNAL FORi4iUEA HYQRflLOGY DRA1NAGE BWSfN ANALY5l5 for 10 YF-AR STQRM ElAEN7 - date: 811 TI38 Projed Name: Midifome East 2nd RcidrLcn @esign kwm Pra3ed Nurn6er; 12838 OM ~l Vzoonanarnia.~.xis Site Lacatinn: N i'IZ S. 34, T. 25 N., R 44 E. W.M Basan Niarne: "L" Bas:n Descnpbvro: Pre Develvpment - - Patrrt aF Can~on: Mcane SCJ6AfiEAS' IntensdY-Durabon fQr 1(]-year Stvrm Eaent Descriptton flcres G A'G rme Tm$ Irrterisity Incrmrvi Incsmrtt Grass Field 6069 25 1517 (min ) {sec } (in !hr) WWI 980 56829 2.28 5 300 318 10 600 2 24 15 900 i T7 20 1200 1 45 25 1500 127 30 1800 104 To4ai Basarr Area> acres = 6.069 35 2100 0.91 Cnmpas[te Run4ff CoeTmient = 0.25D 40 2400 0.82 Cambined (11rm" Ftunoff Goeffcserrt) = 1 517 45 2700 0.74 50 3004 ❑ 6B 55 3300 0.64 63 36IX] 0,61 TiME OF CONCENTRRT10N (minutes)' 65 39D(] 0.60 T(} 42(]0 058 Tc (averfand itaw) Tc (gu(#er tlvw] 75 4500 0,56 4800 0.53 Ct = 015 l.2 = Q 85 5100 052 Z'! ~ 0 90 5400 050 L'! (A) _ 500 22 = 0 95 5700 0.48 N(A) = a.s B T Q 100 woo 0.48 S(A) = ❑ Q2 n ~ ❑ s = 0 Tc (A) = 980 d= 0 Li (a) = o Tc (gut,} 000 N(B) = 0 Tc(A+6) • 9 80 S(4) = 0 Ta totai 9 80 intensiiy = 2.28 PE41{ DiSCHARGE, 141'EAR STOFtM: Tc [6) = 0.0 Hcdd'sng 000 Q= C•I"A = 3AS C.F.S. Q(es#imated @ d) = 000 c.f s. 7ima of Concwuation = 9.80 minutes ua.eo V4Y~'~'•+s~te~ivi - _ -~t . ' - - '~r~ • ~ ~ Zt'kC1 ~~Wrf~«1V ~~~d.~ ~~~C7 `~7RAlrIACS CA~.C'~ti,~~lqfVS ~►~NI ti IOTAL Lra~, o r~+tar cul+; v?-d . +I~ ,~ao,~~ _ 3~Z 1louZ e.s ~ Z►v0a `71 0 aa ar-re, ~1aus~. ~ ltw~E~Y►avs ~ ~ ~ ~9 F0'~3C7 `1,0aQ ~ ~aRP~55 ~ J ti 040 ~ ~I ib`~"~ T~-~ ~ a~~°~. ~ L mvq h ~ r uhaff ~Iawi~g o~~ lr~e- ~i~~. o.v.~ ~~nes~~~l~ Q~~p ~d~y~c~n~ ~roPer~r►~s is less VI yo-kl-ko~Yn~~~ ~r0.j- 0T 'Ahp'CT . i riE!F' J[rY@l ~Q QYoolvta43 9- ~LLCi ~i `ee-$ Arp- ~+~cl1+Lri~~ f O'1^ IV+7LSelry w1-lu . ~ ~ • v - - - ~ _i~:.•~ ov 122' i 25' -A 12 15[3" ! 1 i[l' '[7~ _r-•- g5 ,p. I I ,Y, m gu co c} fl'} X ~ q b ~ j ` ~ ~ 15 ~ 150 ' ui q JL~Na ~ ~4X(}• / ~ 1 ~ ~i I ~~A.._ - i ~ ~ ~ 0 ~ ~i'i ~ ~ . owo "Y , E ~ • ~ 1' L=5' Ln , i • ~ ~J , ~ j °~"1 ~1,~ ► 128"~'~~°••~ 118' G ~ ~ 122 ~ 1 i 15o* ~ ; l 79' 80+ ~ ~ ~1 ~ 1 I~ Buildf 5etbac 118'b 1 118` 1'18' u~ q 122 r LO , - ~ ; r- / ~ ;o 1 7 ; =Ln 99' 0° 180' so ~ ~ 1 OD ~ r 118' 118' 118' ~150' l / +n ~ I b / 0 I i i~ 3{}` 30" or 1 ~ ~ M C+ I vs , N ~ ~ a9 'IV I I ~ 25 10 1 i f 7 18 ~ 5._...~ __--!__,-r, ~ - ~0. I 79' 8080sa' es' 97' 9 T_~__ ~ r N ~ - - ~ y- ~ ~ o~t 19 is 73' a0' 84i iei-U► 8 80` 69" • ~ ~ , 25' 25 'n u7 , 4p h 150" ~10i 93 ~ 50-44F ~ ~ 8953' l 1 "W ~iJ$Z ~D v " ~ ~ 'Pr e- N7ev e1vQm e.%v~r SCAI..E . 1" _ I ari . 'F'os#'-~3e~e4o@vn~rnt UNPLA T-TED , ~ ` . . , ~ • . _ ' . - . . , + - j . . RAT[ONAL FC3RMi![.A HYdROLi]GY {7RAINAGE 6fhSfN AIVALY5f5 for 50 YEAR 5TORM Ei1EMT _ Date: 81171gE Project ljlame' Midikme East 2nd Addrhan Design: kwm Project iVt¢mber 1283f3 DiSk FW ni:~n;~szasa~ Srte Laraten: 4V if2. S. 34. T 25 W R. 44 E.W M Basur Name M. Basin Oescriptson, PosS ❑evelapment Poirtt ot Cancentration• None SUBARERS Intensrty+-Duraton fvr 10-year Storm Edent pescription Acres C A`G Time Time frttensity Incrmrrt. Incrmnt. Grass Lavun 1.014 015 4152 (mm ) {sec ) {in.lhr} Hwuse Rarfs 0.163 090 0.145 M+^sol 7 33 439.52 3 94 5 300 4.5$ 10 600 120 15 900 . Z47 20 920U 198 25 1 50D 1.5'"i " 30 1800 146 ToTal Basin Area, acres = 1.172 35 2100 1.30 Camposis Runaff Coefficient = 0.253 40 2400 1.1$ Cornbined [Area " Runnff Coe#Fxaerit) = Q.296 45 2700 1 47 _ 50 3000 1 00 55 3300 0.92 60 3600 0.87 TiME aF CONCENTRATfOi+F (minutes]: 65 3900 0.82 70 4200 0.80 'rc (nveriand Raw) Tc (gultar flnw) 75 4500 0 77 8I] 46Q0 ❑ 75 Ct = 0.15 L2 = Ci 85 5100 0.72 Z3 = 0 90 5480 o.TO Ll(A) = 95 72 = 0 95 5700 0 69 N(A) = 0.5 8= 0 1[]0 6000 0 67 5(A) _ [}.C1053 n ~ 0 s= 0 Tc (A) ~ 7 33 d= a Li (B) _ 0 7c (gut-) 0.00 N(B) ~ 0 Tc(A+B) = 7 33 5(B) = 0 Tc tctw 7 33 frrtensrty = 3.94 REAK DISCHplRRGE. 1U YEAR STOiiM: , Tc (8)= 0.0 Hokhng ❑ 00 @aG"f'A= 1.17 C.F.S. Q (esttrrrated @ d} = fl tlo c.f s. - Tme aF Concenbabon = 7.33 mmutes ~.rrdri •rjs Y _ _=xr-x _ . , ~ r~ r~ s~:•_ ~:s+a~,.,rr-.. - ~ ~tmr+yr_ n . , . ~ _ _ . , _e . r - . . 1x :i~K~i~°,~r F` fir:' .4$if' "'•r - ; - , .ti 5 '~'uAT1ONAL FQRMULA HYl7RQLQGY *DR41NAGE BA511d ANALY5l5 fior 50 YEAR STORM EVENT Datw 8117r38 Project Name, iulidilame Easf 2nd Additson De,ign: kwm Project Number 128W oisk Flia: Al V2bMwk1cn1 2s3s.~ Sds LocaLan: N 1/2, 5 34, T. 25 N. R. 44 E. W M. Basin IName. M. BBsin i[7escnQtlof1' F~re-DEmrelop[rlerif Posrt af CnnceRtration- Nvne Si9BAREAS Infensity-D urativn fvr layear 5torm Eder►t Descnptian Acres C A'C Time Ttme IritensR}r Inermrn. Incrrnnt Grass Field 1.390 0 25 0.347 (min.) (sec } {inJhr} [W= 8.17 49[} 33 370 5 3£]0 4 58 10 600 3 20 15 5EH] 247 20 1200 1 98 25 1500 167 , so 1 800 146 TaW Basin Area, acres = 4.390 35 210[] 1.30 Co7Rpasite RurrofP Ctrefficiart = 0.250 40 2400 1.18 - Cambreted [Area * RunofF Cvefficaerrt] ~ 0.347 45 2700 1.07 50 3000 100 55 3300 0M 60 3600 0 87 71ME OF CONCENFRATlOA1 (minutes): 65 39OGti 0.82 70 42tI4 080 Tc {ouadend Row) rc (guf#er Naw) 75 45DO 0 77 $d 48W 075 Ct= 015 l2= 4 85 5100 072 Z1 = 4] ' 90 546i] 074 L1 {A} = 19Q Z2 ~ Q 95 5700 0 69 N(A) = 0.3 13 _ a 1170 6000 0.67 S(A) = 00053 n = fl s = 0 Tc (A) = 817 e! = 0 L9(8) = d Tc (gu!•) 000 N(B) = Q Tc{A+8} 8.17 S(B) = Q Tc tctw 8.17 lrderrWy 3.70 PEAlC D15CHARGE, 14 YEAR S'fORM: Tc (B)= 0.0 Holdirg 0.00 Q=C"1"A= 1,29 C.F.S. Q {esbrrmted @d} = 0.40 c.f s. Time of Cac~on ~ 8.17 rrsinr,nes ~~s - . ' ' , _ . ' " Lf . •i ,n~, y . ~ ^ :._;F' * = ' „ a ' . RATIONAL FORM[JLA piYDRClE47GY DRAINAGE SASIN ANALYSIS for 10 YEAR STC3RM EVENT ❑ate: s117/98 Project CVame: Midi3ame East 2nd Addibars Qesign kwn Projed Nurn#er 12838 Ot"File Az v2=Mni~12Ma_NiS Sde Locatian: N 1/2. S. 34. 7- ZS N., R 44E.1N.W E3asin Plarne: M. 6asin Oescnption. Post !]evelapmenf Pnirrt of Concentrabon NQne 5U6AREAS. Intensity-Ouraatson fcsr 90-Year Storm Evert Descnption flcres C A'C Time Sime Irdensiiy IncrsnM. Incrmnt Grass Lawn 1011 0.15 0152 (m3n ) {sec } (mlhr) Hvuse Raaofs ❑ 461 090 0.145 Mi`m 7.33 43,952 274 S 3Qa 3.18 10 600 2.24 15 900 1.77 20 1200 145 25 t`00 121 3(1 1800 1 04 Tatal Basin Arsa, acres = 1.172 35 2101) 0,91 C=pasate Rurxiff Caefficierrt = 0253 4(] 2400 82 Combined (Area ` Runoff Coefftc:ent) = 0 296 45 2700 0.74 • 50 3000 0.66 55 330t] 0.64 60 360[7 0.61 fiIME C]F CC]IdCENTRATION (minutes): ~ ~ 060 3(1 4200 058 Tc (vverland flaw) Tc (g+Jttar nvw) 75 4500 056 SQ 4800 0 53 Ct = 0.15 L2 r 85 STOD O.52 Zi = 0 90 5400 050 L, 4Ay = 95 zz = a ss siav 049 N[►a) = 0.5 B = ❑ 100 6000 048 SIp3 = 0.OD53 n ~ o sr ❑ Tc(A)= 7.33 d ~ o 1-1t83 = a T~ (gut.) 0.00 N(B) = o Tc(A+B), 7 33 5(B) = U Tc total 7 33 iffl"sry - 2.74 PEAK DscHa►RGE, 10 rEaR srvRM: Tc (8) W 0.0 Moldirtg 0.00 Q = C't *A = D.Si C.F.S. 0 (estmated @ d) = 0.00 C.f.s. , Tim of ConceMration = 7.33 msrn,ites "Paul , - ; i; ;,:~-a~. . . - . . • nwr „a r r.w•~~, . -P - e~ ~ - - . " rta~ . N RAT]ONAL F+[]RMllLA MYDRflLOGY E3RA1NAGE BAS1iJ ANALYSiS far 10 YEAi7 STORM E11E1VT Date: 8/171W Praiect tisme' Midilome Eas! 2nd Addfdon pemgn: kwm Pmiect Nurrtker 12838 oh.k Fae. a1 V2=MA10%12MJd5 S'rte Lflcahon: N ifZ 5. 34, T. 25 N.R A4 E. W.M Basin Name Basin Descriptissn. Pre-Derelvpmen3 Pant ai Concentmbon• Nane SUBRREAS: Irrtensitv-Quratiorr ivr 1D-Year Starm E+rerst Desenption Acres c A'C Time Tme [nterisity Incrmnt fncrmnt Grar,.s Field 1 390 0.25 0.347 (min ) (sec•) (m.Rir) c01'M 817 490.33 258 5 300 3.18 14] 6oa 2.24 15 gm 4 77 ' 20 1200 1.45 25 1500 7 23 30 1800 1 G4 Tata1 Basirr Area, acnes = 1.390 35 2100 a 91 Composte Runaff Coeffixent = 0.250 40 2400 0.82 Corrsbined (Area'Runaff Coeffictent) = 0.347 45 270(] 0.74 50 3004 0.68 55 33)Q 0.54 6[] 3600 0.61 T1ME 4F COAICENTRATI4N (minutes): 65 3900 0.60 70 4200 0.58 Tc {overtand flaw} Tc (guttatflaw) 75 4500 056 so 48M 053 Cf = 0.15 !.2 = [D 85 5100 0 52 ZI = f? 9U 53100 0 50 LS(R) = 190 7-2 = 0 95 5700 a.49 P!(A) = 0.3 8= 0 100 5000 ❑ 48 5{A} = 00053 n _ ❑ s 0 Tc (A) = 817 d = Q - Li (B) = 0 7c {sut.} 000 N(B) t d Tc(A+B) 8.17 S(B) ~ Q Tc tow 8.17 Qntensi#y = 258 PEAF[ D[SCHARGE. 14 YEAR STC}RM. Ta (8) = 0.0 Hc~dirsg 0.07 Q=C* I' A= o.9tl C.F.S. Q (es&nated @ d) = 0.00 e.f.s. Tune of Cormenuation = 8.17 msrnltes mpmp #i.~+w:~._-_ ` y . .c.-~ , d' 1 - . ' •f . , . . . . . ' ' ' ~ti-. . ' v . . 1ry s depth of 1.2.' ~~'i.I; Iarywe3.Zs - Precast cflncrete dry_ wells, as. - showQ. on Gnunty staadard V=I.486 R 2r3 5 1/2 R • Area drawf,ngs, aag be used ca reeaiu stmrm ~ a Wetted perimeCes draiaage in sai].s with a very rapid per- meabil.itp. Tqpes Aand B Drynwells i.n the foZlowia~g so.~I.s a~ap be desfgned to ; ~~'x1.Z'+{~.~.2} = 5.28 s.f. infiltxate a rate af fl,aw of 0.3 rfs and 2+2(1.22t2.42) 7.36 ft. 1.0 cfs res}aectiveTy: Boag MarbIs R - .7I7 Baaner Phae6e ~.Garrisan ~ priazgdale) 213 V - 1.486 (.7I7) ~.02}112~ 5.61 fps The Zocation$ ❑f these soil Cypes are U3 shawn ia zhe 5oi1 Caaservation Service Q- VA = 5.61 fFs x 5.2$ sf = 29.5 cfs SoiI Survep for Spokaae County. The , drainage repart shall, fncIude acopp of ' 3D c£s d- 1.2' _ the SC5 map with the ssabaivisioa pZatted therean. T$e Covnty F,agineer sha.,ZZ re- Solve Dc' Tay I.3' quire the developer to provide a si.eve analp$is and saiT tyge test from a soils IabQratorp accepCable to the Cauntq Ea- Q= ~ g{b +~r Dc)3 D3l2 gineer if there f.s a questian regarding ~ the abowe soil tppes. b + 2Z Dc 3/2 In rural areas, as defiaed in Spo[cage q~432.2 (2+2a.I..3)3 g1.3 - 30.4 cfs Couaty Road 5tandards, open gravel dry- {2+2XZX1.3} weB.ls may be permftLed in lfeu vf the 30.9 cfs - 3{] cfs ac = 1.3' precast concrete drywel3.s. D> D, fiow is supererit~,ca~.. Precast caacrete dry~wel].s propnsed for c n use in other aviZs thaa [hase shoraa Sittee the- flaw is supercritica]., care ab°ve and aiI qpen gravel drywe3l.s siaIl shauld be taken to pravide a proper de- be designed accortii,xg- to gercolation rates determined by a~ie1d test can- siga at. pofnts where ~ZOrixontal and/vr farming to the Manual af Septic tank vertica.l., al.ignment change. practfce. A Cotsnty 3napectcsr $halI be A free board af .30d aho+s3d be applied Pr+eseat during alI perrolation tests. A percolatfan test calczslatian sheet D- .30 X1.2 - 1.56' sigaed aad sealed by a regis tered civil ergiaeer shall be submi.Cted. The per- V ; ,a~m,~ ~lowable. co].atian rate s'i~a].I ie e~gual. to or 5.6 f~s y greater than 72 iacbies per hotzr to be Provide rip rap. (Befer Ca 5ectian accepCable fer dryweIl canstructian. 4.5. ) 4-4. 2 Stosage Facilf.ties - I3etention 4-4 Detention/Aeteatioa Syetems - The starage faciTities may #e used to peak ratE af tun-aff from an ex-istfng regulate flaw rates. Aa overflov site shaZl not be increased dne to the tppe starage system which regu3.ates the praposed denelogmett far agi.ven desigat rate vf autfTowr shall be used. See storm. Therefcre, a reteati.anldeten- Pigures 4-3, 4-4, 4-5, aad 4-5 far tioa faciIf ty on-site uriIl. '6e required. $uggested detai2s. Landscaged facil- ities such as pariss, plapfie.].ds, zeanis n..t2. A►►. joR courts, etc. are recommended €Qr 4-35 Nfidilome East 2nd Addatian Sight I3istance Analysis- Vercler Dn've Intersection of 35`h Avenue vAth Vercfier Dnve Intersectian of3e Avenue with Vercier L7rive SiQht Distance ReQUired Equations and figxres from AASHTO- +Ceametric DesiLn afHighways and 5treets were used to deterrnine the sight distances required for a car waiting to merge Qnto Vercier DriVe The foiiowing criteria were aisv used: l Verc3er Drive is a lncai access street with design speed af 30 m. p h- 2 T'he stopping sight distance is ?DO feet. 1 DriVer's eye is 16 feet laehind the curb line on Vercier Drive, and dn'ver's eye height is 3 S feet abave raad. 4 The object height or oneoming vehicle height is 4 25 feet Case S-1 Left tum ont9 Vercler Drive across ane lane of traffie with vehicle apprvaching firom ieft. d _ { 1 aa}(V)(J + ta) = (1.47)(3 )0}(2 + 4 8) _ 300 ft d= sight distance ta the Ieft a[ong the rtaa]vr highwav from the intersection, ft. V= 30 mph, design speed on the major roadway, mph . 7 = 2 sec. t, ~ time required to accelerate and traVerse the distance to clear tHe traffic in the lane approaching fram the Ieft This distance is the srurn af the ten faot setback to the stvp line, the length ofthe vebiele, and the distance traveled tv crass the apposing lane(s) (appraximately 1.5 x tane width), ta =4 8 sec. from Figure IX-3 ) 3 far s= l0' + 19 °+(1 5)(24' ) = 59' Case B-2b Left turn vnto Vercier DriVe across one lane af traffic and merge wath traffic fr❑m right. d= Q -h = 349'-56' = 29-3 ft Q = (1 47)(O.85 x V)(3 + taJ = ~1.4 7)(0 85 ~c 30)(2 - 7 3) = 349 ft. `J = 3(] mph, design speed, mph ]=2sec. ta = 7') sec fr❑m Table IX-7 for V={4.SS x 30} _?5 mph, and F= 140 ft, h=P-l6 VG -L = 140'-16-49'--I9'- 56ft P= 140 ft From Fig iX-34 for V=(0 85 r30) = 35 mph V G = (1 9)(0 85 x V) = (1 9)(0 85 x 30) = 49 ft Nfidilame East 2nd Additivn Sight Distance .Analysis Vercler Drive Intersection of 35~' Avenue with Vercler I]rive ' IntersWlon Qf 35`h Avenue unth Verc2er Drive 5ieht DiStance Reauired (continued): Case Cb itight tum ❑nto Vercier Urive and rnerge with traffic frQm the left d = Q -h = 349' - 58' _ 291 ft. s Q = (1.47)(0 $5 x V){J + (147)(0 85 x 30}(2 + 73) = 349 ft. V= 30 mph, design speed, mph ] _ 2 sec t~ = 7 3 sec frflm Tab1e TX-7 fvt- P= 140 ft, and V =(0.85 x 3 fl) = 25 mph h=P-14.3-V.G.-L = 140'^I43 - 49'-19'= 58ft. P= 140 ft frvrn Fig. IX-,4 for V =({7 85 x3 6} = 25 mpn V.G. _(1 9)(0 85 x V) _(1 9)(0 85 ac 30) = 49 ft. Nfidiivme East ?nd Addition Sight Distance Analysis 35`h AVenue and 36`hAvenue Tntersection af Virginia S#reet with 35`hAVenue Intersection of Virginia Street with 35'h Avenue 5ig.ht Distance Recuired- Equatians and figures fram AASHT[]- +Gevmetnc i]esign 4f Highway5 and Sfireet5 were used ta determine the sight distances required for a car waiting ta znerge onto 3ShAvenue and '36`h Avenue The fvllowing criteria were also used- _ t 35`hAvenue and 36"' Avenue are 1oca1 access streets with design speed o#'30 m ph 2. The stappirtg sight distance is 200 feet. 3. I]river's eye is 16 feet behind the curb line an 35'hAVenue arid a6''' Avenue, and driwer's eye height is 3.5 feet above rvad. 4. The object height or oncoming Vehicle height is 425 feet y Case B-1 Le#t turn onta 35~' Ayenue (vr 3b`hAvenue) across ane lane ofira.fFic wtth rrehicle appraaching from ieft d = (1.47)(V)(J + ta) = (147)(30)(2 + 4 s) = 300 ft d= sight distance to the tefk along the major 4vghway from the intersection, ft V= 3[] mph, design speed on the majvr rvadway, mph ! = 2 sec ta = time required to accelerate and traVerse the distance t❑ cIear the traffic in the lane . approaching fram the 3eft. This dsscance is the sum af the ten fvot setback to the stop Iine, #he length of the veYucle, and the distance traveled tv cross the oppasing Iane(s) [apPrvacimately 1 5 x lane width)- ta =4.$ 5eC from Figure TX-33 far s= 10' + 19' +(I 5)(20') = 59' Case: B-?b Left turn onta 35~' Avenue (or a6~' Avenue) across ane iane vf traffic and merge vvith traffic from right d = Q -h = 349' - 56' = 293 ft Q (1.47)(0.8 5 !G Y )(9 1 ta) - ~ 147)(0 85 K 3 0)(2 + 7 - 349 AL V= 30 mph, design speed, mph .T = ? sec. ta = 7 3 sec fram Tab1e IX-7 far V=(f} 85 x 30) = 25 mph, and P= 140 ft h =P - lfi - V Ci -L = 140'-16 -49'-l9'- 56 ft P = 140 ft tiom Fii-, 4Y-34 far V = (0 85 ~ 30) =?5 mplj V C'a 9 (1 9){0 85 x 4j} 1 4){0 85 r- 30) =49 ft I Midilame East 2nd Additian Sight Distance Analysis 35`h AVenue and 36"' Avenue Tntersection of Virginia Street with 35`h Avenue Intersecttian a#'Virainia 5treet with 36~` Avenue Siaht Qistarxce Recuired (cantinued). Case- Cb Right turn onto ~5'h Avenue (Qr 36hAvenue) and merge with traffic from the left d=Q -h = 349' - 58' = 291 ft. Q=(1.47)(0.85 x V)(J + ta) =(1.47)(4 85 x 34)(2 + 73 = 349 ft. V = '34 mph, tiesign speed, rnph J~2sec t~ = 7 3 sec froma Table IX-7 for P= 140 R., and V= (0 85 x 30) _?S mph h-P -14.3-VCi.-L = 144'-14 3-49'-19'= 58 ft. P= 140 ft. from Fig. [X-3 )4 fvr V=(0 85 x 30) = 25 mph V G. =(i.9)(0.85 x V) 1 9)(0, SS x 30) =49 ft. ~ ~ ':'!r•~d!'T',"-T^ .•'R 4n._k.' _•,fC'Y*~4'"Fq' T 1'M'Y'+i , , Tn`C'fIN ay i,. , M1cWOm~ Eas'~ 2nd Addit14n ~ 4 F ROAI]WAY SiJRFACIlNG L]ESTGN. T'he Spokane County Alternative T'avement I]esign (Interim) far Local Access Pavetnent 5tructures was used for design of the roadway surfacing. Fram the table, Lacai Access FaVeanent Structures, rhe fvilowing infarmation is needed ta determine the required surfacing depths. ]}The type of streex must be Iacal access Z) Soil type (as classified by the L]nified SoeI Classificativn Systerra) 3} 7`he average daily traffic, ADT Street, Type: All stree~s within the piat are designated as local access (residential). Soil Type: The geatechnicaI engineering report shows that soii samples were taken at 3 test pits wathin the piat TP-I was at the intersection of Vercler I7rive and W" Avenue, TP-2 WaS aL the IIITeFSeCt1Qn of 35hAvenue and Virginia Street, and TP,3 was at the intersectian of 35`hAvenue and Virginia street Gradataon analyses show the soil sarnples from TP-1 are ciassified as GiVt TP-2 are classified as SM, and TP-3 are ciassified as GM based on the Uni$ed Soil Classificativn System notation. (See geoteeh-nical test results) Awerage I]aiiy Traffic, AIJT Vercler Drive wilP have average daily traff c counts of ]ess than 204 In the future, this road may be extended sauth amd the ADT count will pro6ably increase tv the 20(]-600 range. Therefore, this raad wU be constructed at 100% bufld out far the future canditiQn. . 7'he remaining rvads, 35th Avenue, 36th Avenue, and U'irgizu'a Street, wiil be short crvss streets each with average daily traffic counts of less thao 200 A ta.ble of the streei names, design data and the roadway surFaeing depths is included. SUNIMARY DF RC)ADWAY SURFACdNG DEPTHS ,STREET~NAMF-" -5TREET TYP,E: • 5OLL T'YI''E . . . ,.AT7T SURFACINCi vt „ . . , . . Vercler Dnve LCJCal AGCCSS CxiM 200-600 2- AcP ei~~s A assumes 1430°Io build aut T" Grushed Srarfacsng, 35th Avenue Loa Access 'Sfvt 0-200 Z" ACF Glass A y TY Cnished Surfaciniz 36th Avenue LDCal Access +GM a- 20ti 2„ ACP Glass A b" +Grusned Surfacing ' "v 11 UlIllai S tfCCl LJCai AGCeS$ 7'• ACP C$a55 A ~ { 7" Crushed 5urfacinu - : a-- ..~"r~a.'t'. - _ , ,iiu~. , 4 ~ a ~ a,-~ f +,:^':i ' y~-'~•~f LOCAL ►4CGESS PA1JEMENT STRUCTURES ' AVERAGE DAILY TftAFFiC S0IL TYPE 0- 20d 200-600 600 + G1lV Z1/611 . Z#/611 2"16=, GP 2"16„ 21117 2,►fT, CGivi ` F/6fl ~Ii~ffT 2If I+QQ1T , ~ , ~ GC 2"1~ P i3 ~7je Ln~if€7e1 ~3 ~]fo'C~C1r sY V ~1111f]!r 2se~{11 2i~ IT~' ~ !1 SP 2 f#/0 G" ET i'] I I f'] f I l I I POt~! 1 ~ T ~ Grr + 5~ (2'77~) 211/811 ~ ~]f~/iU sc PaVement Qesign }_"~11 , ~ ~ ■L 311/611 3Tl1811 411'~~ . CL Pavemen# Design QL ~~'IT' 511/7" 511/61 MH Pavement Design OH Pavement aesign PT paVement ❑esign 1) Saii type is eiassified by the Unified SaiE Classification System. 2] Required thickness 'rs given as inches of aspha6t concrete pavement over inches of crushed surfacsng. c~n V A r,!~rr r+,~r±i rr~rTr A! T~0 l~!!'T= r~ w~;! ~N! +u i fri f~1 i'i ~ w.► 'f..r i yl i i si'i i.~ i~ W~ 1'r~ ~F"\ 1 !"'1 ~ I~i i* i~ i 7 1 ~ V ~ id . (INTERIM) ~ - 71 ~ ~e. _;~}~~~r ~a _ _ ~y~y-,.~.{{.-&X. ~bf'r•,~FST'- _ ` ~ f' q • •7, 7 ar', 4 ,p. ' 7,y... , • - ! ~ • ' ppr►Tgr.wsicAL. [r141KCSRIpC a M4+1-~uA44 1L"fi1J4G ~ II`JIS M. AAy,. It7 Mevn+ri:, rru: Il1Z. ~4►J-0 'WA;-r- t1S1l1• SfCAL ! VaW SCSIi/7l.:SIJ i ca nrrl3Ylilipkl2EdJCA'r C7C.OY]C'F IS, 1998 ' Client No. SWENC'r Project No. 5991MISC Re3crcncc Na.: SL4377 Mr. Kcvin NlcMulkin Sirnpson Fngine,crs, InC. 909 N. hs,gonnc Raad Spak,ane. W A 99212 Pmjcct: Nlidilome F= 2nd Additi:m ]Date ITeceived: October 6, 1998 Date Tested: Uctabcr 6, 199$ I.cscacinn: 36ih and Vcrcicr llcsc:iption: lirown Silty Crrawel {(`TM} SiEVE SIZE I PL, ItCF.Nr P ASSrNc 3" ~ tGfl 2•• i 77 r' ~ 71 ' 3!4" 66 4 t12' p 59 31~" 1 53 No. 4 I 42 No. 10 ~ 33 Na.40 N 28 N0. 80 27 No.lUi] ~ 26 ~ No.2Qa I 20,3 Sincerely, S'I'RA"TA, IYwC. Rick Wnndwnrtii '1'esting 5emices ylanager RIW:kh _7 ~rr~ .ye~o • r~V •:4a . 'r, •z.. • ir:. . ..ni•. , i ~ ~a :,s z•. ' ,3 ~cq,-r"'~: - we4 ~-r ° f x`' ' r a^1s~.. -.~"~.~MX1 ;-R"~'. ;.~~1+~r` ~ s T R a 1 ~ Ogfi1F4.F4#fLAL CH~'riMEE1"MfS F YlIlhplhLyTLy'CZF1r. ~ i[i••el wK.r+xr rl,l. Vr" +.►j:.~phM iee1 Knwrxr. wA99Vti `.w E!1 ~ 5'tw 1rrFe :CiM1 ['im' 7012 f C rrciil:.ua6t3~k~ scIXAM (7Ct0bes 15, 1998 C:Iierst No. SI11+~FNC Prc}icct No. SJSMISG Referencr-Na.: S1.4373 Mr. Kevin Mc'.VVIulkirt 5impsvn Enginccrs. Inc. - 909 N. Argnnne Retad Spakanct WA 99212 PTfl;Cct Nlldilome F.a..4t Znd Acidition Date Receivecl: Actober 6. 1998 i7ate Tated, C]ctober 6. 1998 [.ocaiion: 35th auad Virginia , 17esCriptiDrt: F'lrown S iity Sansi wilh C'rravel (Siti+i) SYEYE SI'LE Y1CRCrNT PASSTNC I 1 112" 100 i i" 1 92 3I4^ I 90 1/2•• ~ 78 318" ~ 71 i N No.4 I 54 ~ No. 10 41 . No. 40 35 No. 841 31 ` Ala. 100 No. 200 j 24.2 s inCerely, S'TRATA, FNC. Rick Woodwnrth '1'esting Services M=ger RJw wh I:AF6: MFF9 ~G . :Fei • r~"iti11hC . ~r ar.. • , • - ~w. y~~Y~,,ES. ~-~Tf'~.~C',ein~ietacw ~ ururr.eair►Ecx• or+mr.tmir,u 1kF14nmlA1.-r IF~SI1FILi ~ 11M[7 NkLriva lkl_ tliul+wl:•, +sur 1Cr..A9Ri[s1 w.l12V'R :w'.T,tlilk! f~4~M1 f ~.ta~~SiC.~!!f f if ~~~7d~yTA~LLY4Qlw-i{23141 C3r:tober 15, 1999 Clicrst No. SIMCNG Projec:t No. S98MISC Rcfc.-cnec No.. SL4377 Mr, Kwin McMufl:in Simpsun Fnginem, Inc. 909 N.1ltgaaac Road Spafkane, WA 99212 PFoject Midiiomc East 2nd Addition Datc Rcccivcd: Oczvl,er 6, 1998 l)ate 'I'ested; {3ctober 6, 1993 Locaiion: 36th and Virginia i]escsiptinn: Brown Sziry Gravcl (CiM) ~ STFVE SI2F PERiC:ENT YASSING 21) 100 1 ] f2" ~ 9? I 1,. I 83 314" 3 ►8 lf2" ~ 67 3lR" 62 No. 4 46 No.lO ~ 33 No.40 I 25 No. 80 I 23 ~ No. 100 ~ 22 No. 200 ~ 18.3 Sinc:em4y. STRATA.1NC:. Rick Wcmdworth 7e-Nting Services iMana,;er zUw*h r.ry . s~} . a• t:~ +~ar •^Jr:M r ~r •ao ~v+~r•:~e: • • `E e •e V _ , ~ I ~ _ . . . _ . ~.~r . , . . . . , . • '.f ~ . . ~ , t , . . ~ ~ 74 ~ SOIJ, SBRVEF ~ srosa~~ caUN-TT, we:,vcrax 75 ~ r • . TesLE6.-B7ief descripfions af soil,s and tleir estymated physicad ¢nd chemicrtl propertizs--Coot'vaved ~ ClessificaGinn _ j ' ~ De th Glessificatioa-Cr,ntinued Percenta6e Pussing sieve.... , 3Tnp $o;l name Description nf sad and site iram ' ; d~•nilabie I~ s}•m6o1 surface Permeahility Nacer R28CtJ00 Dispersion Shnnk•svell USDA featiure ~ -No. 4 \p. 10 \a, 200 cunncicr (1:3 dilution) patenual ~ UaLTied AASHO (4.7 mm.) (2A mm.) (0.074 i a tnm.) , ~ bsC Dragoon siony silt lpum; 0 to 30 percent Similar to Dragao6 silt lflam, 0 to 30 peecent In~' tn pqhr, tm Pe, ,n, oj'°d nH I ~ , slopes. slopes, except that the surface iayer is swny. ~ DsD Drsgoon stony sdt loam, 30 ia 55 pcr- cent slopes. I i ~ ~ DvD Dragoan verr roci:v complex. 20 to 53 Dragaon part simdar to Dragoan sdt loam, 0 to percent slages. 30 percent slopes, eYCept thnt depth to bed- rocb ranges fenm 14 to 30 inches. Rock out- crap included in this complex. - EicB Eloika silt loam, 0 to 20 pereent slopes. 1ledium-textured, n•eli-drained sail foemed frnm D to 34 5ilt loam_..___.____ 1 ' ~ glacial tr11 cantaming a lar;e amount af va]- tijL-CL---- A-4 Sa to 93 Sa to 85 60 to 70 p S to 25 O. 1-1 to 0 ?0 fi 1 to 6, 5 Fligh------- Low aa mod, aanic ash in the surince lavar; underlam by 24 to 44 GraveIly lnam-------- erate gravel at depth af 30 to 60 inches; occupies 44 to 53 Very gravelly sandy E d S?4l A--mL 75 to 85 40 to 80 35 to 50 Q 8 to 15 Q 12 to 0. 14 G 1 to 6. 6 Hf4h------- Lp55'• undulating, maraanelike topogragb}•. laam. n 53 to 60 Gravel - G M A-?------ 30 to 60 20 to 30 5 io 15 5 0 c 10 0 p. QG to 0. 09 fi 1 to T. 3 Hi;h------- Lon•. I ; ~ ~ ~ t EIC Elaika very stony silt loaw, 0 to 30 per- Simil3r to E1Qikasilt lasm, 0 to?0 percentslopes, GP A-1 'a to 33 10 to _0 0905 10 Q. (]4 to U D& 6 G co i 3 H ioh Law• , centslopes e.cegt thas thep ure very stoAy ttiroughont. ; EID Elpik-a verr stony silt laam, 30 tv 53 ~ ~ ~ pL---- ~1-4 9a , D S ta 2.3 erCOnG 5 a es. . t 0 II Em Emdent silE laam, ljedium-teztured, some~vhat paorly drsuned, 0 to _6 S;It loum____.______ ' . ~ _ t0 1QQ 9Q 0 1 0 9a to ~3~ d ~ alkalrue snil tormetl in niluv• ~um from caicmr- I~~L-C U. i; ro 0 20 7, S to 9 0 EIigh------- Lo- tomori- eaus sdt, valcanic asb, and diatonxte; depth 26 to 41 Verp 6ne sandp ' erate. ' to muter tahle fluctuates from uear the 5urtucs loam. iNiL A'4 95 to 100 BU to IOp 60 to 70 0.8 to 2.5 p 17 Lq U 30 7 4co g 4 AIoclerate___ Low. ~ w about 8 feet. 41 to 60 Sandy cluy laam..__ CL-------- A-G------ 95 to 100 84 to'3a 85 to 90 0.2 to 0.8 0. 17 ep q°p 6.6 to 7.3 11odernte, Fa9 Freemsn silt loam, "o to 20 perccot Very deeo, moderntely well dramed upland soil5 U to?: $ilt loam----------- s1aPes• Nith tnedium-texturedsurfacelayer and medi- A-4 95 to 100 90 to 100 80 to ~JO 0 2 ?o' 0,8 0. 17 tu fl?~M G 6 to 7.3 ~foderate___ Lvn• to`r~vd- ~ Fa03 Fraemaa silt loam, a to 20 percent um ur mvderatelrt• fine te.ztured subsoil; formed 23 to 72 $iltp claq toam------ erate. - slapes, severciy eroded from sdt an rQlling to hdly upland5. CL---.----- A-G------ 95 to 100 90 to 100 SU to 90 <Q. 05 0. li to 020 , 6. fi to i. 3 Lan•------- 19aderate. ' FaC3 Freemaa silt ]onm, 30 to 30 gercent slflpes, severely eroded. ~ Fm Fresh wnter marsh. Shallow, srrampg, intermittxnt ponds and I [ringes amund ln&es tlsnt hsve a Buctuati,ng rrater tmble. Engiaeerang dafa is mot givcn, ~ as laad type is tao variable. I . ~ GaC3 Garfield sitty clay lonm, 4 to 30 percent l"ery deep, well-drained soa develqped in laess p to 8 $ilty ckay loam..____ slapes, se ' I ~ CL-------- ~,`fi--°_- 95 to 100 90 to 100 90 ta 95 0~' ta, 0. 9' Q 17 to 0 16 ' 6 G i,o; 3 Lorv--°----1[odera1e. rerelq erade~. on ric§gewps and knohs on the rolLng to hi~~ S to _3 S~ltq clay loam C$.------- A-7------ 95 to 100 90 to 100 90 to 95 Q. (]a to ' 0. ^ 0.19 to Q.1 7 I fi 6 ro7. 3 Loir-------' High. uplands in the Palouse sa~ area I . ?3 to 60 Saity cl~y ^ ! ~Afnderate_ L,____.__ ~i-fi------ 95 to I00 ~J0 to Eo0 90 to 9a Q. to a D li to 0 20 G f to 7 3 Lo~v I GgA Garrison gravelly loam, 0 to a percent Gravelly, m edi um- textured, somewhat exces- 0 to la Gravelly loam__.._.. ' I siopes. siuely draaned sails farmed in gravellv glac:al 15 to 41 j'en gravell r §oan_. Sim--~----- A`4------ 85 to 55 40 to 50 35 to ad} 0. S to-'~? .i 0 12 to 0 14 G fi to 7 3 ?~'~adcrate Lon•. GgB Gfur:son geavelly lo~,m, 5 to _0 peecent out~v3ah matenal frur~ a vunetr a£ acid, 94 to GO Sand, gravel, and G~T-------- A-:------ 45 to 65 30 to 60 5 to 1$ 3 ao ~5 0 0. USIo U 10 i, G. B to 7.3 1ioderaie__.~ Lasr. slopes. igneous purent racl•; an nearlq levd to mod- cabhlestones. GP-------- A-1------ 25 to 35 10 to :0 0 to 3 > 10 U. 04 to 0 OG G G to 7. 3 HigS------- I,ow. ~ eratelY ~,loping terraces; depth to misture ai ~ I sand, geavel, nnd cobblestones ranges from i °-i: to a feet. ! ( Gm8 ~ Carnson eear gravell}• loam, 0 to 5 5imd;tr ro Garrison gracellr loam, eecept that Q to 15 J'err gsavellr loam_ _ ~ pereent slopes, the suiface l:irer is verc gravellr. 13 to s~ eri~ gruvelly lnam_. GM-------- 30 to 60 ?{f to 50 5 ia 15 i:, 5 to a, 0 0(): to 0 la i G 1 to 6 G ?tladcrate_._ Law. ~ 44 to 60 Sand, gravel, and . Gl1-------- r1-2------ 45 to 63 30 w GO 5 io ia ,i to ;a Q U 08 ia 0. 10 , fi G¢a i. 3 lloderate Lflw. cobblestones. , GP-I A,1 23 to 35 lU to °d 0 to a i1'0 U. 04 to U. 06 ' G 6 to 7. 3 Iligh------- Law. GnB Garnson uerv stoor lnam, b to 20 Similar to Garrison grarelPr 4oam, "cept that percent slopes, the surfaee laver is uer} stanr. ' GpA Clenrasesittloam,OfoSpercentslopes, Verp deep, me3ium-testured, weA-drainedsoils 0ta72 , Sdtloam____.______ GpB Glenrasesiltioam, 5 to 20 percentslop~s. forined from acid igaeous glaCial til1; surfaec bffCL-.-- A-4 80 tO 93 75 w 95 Gi? ca 55 1 D, S to r~. 5 A. 17 to 020 S, 1 W 7.3 1loderate__ Low to GpC Glenrnse s~16 1Qam, .D to 30 pereenti lati~er in,~uenced b}• loess eud volesnie ~sh; an ~ ~ slapa• _ geAt]} roIImg w seep uplands. , ~ GPD GPenrnse szlt loam 3(] in ~e•~~::+ , . , ' f ~ F~. - J`~ . _ . _ •...w.. ~....__._.,.s.. . . ~ . , . , - ri.. . - ~ -s: r~. . • a~a~ a .r . . . ~,.~t-r . p~, ~r . ' . , ~p5ay~•. ~'t'~~ , + . . - ..4:±.?~~r:. ~~:!~:k*-"~ I ~ 84 soM snavEx 5P01'uL\`E COIIh'R'Y' WA:JUXGTQN 85 Tas~ fi.---Brief descriPtians o soils a~ta' tl~eir ~ . estamaCed physic¢l arid chemicdl properGies-Cantinued Cla:si&cation i ~ ClassificatIoa-Gantin¢ed Percent e ' - ~ - Depth . a8 Aa&smg sieve- ~ blap Soil name Tlescriptia¢ aE suil and site fram - A4ailebfe s}7mho1 surface , No. 4 ~a. l~ ~q. ?~0 Perma6~tr' ~rate: Reaetian Dispersion 5hrinb~wd1 CTSF]~1 tesaure ~3nified _1.iSHQ (4.7 mm. capacitir ,(1 a c~utian) • ) (2.0 mm.) (p.~7{ patenxial • , mm.} ~ . ; Tn, - 5a~. Spe'sgle vern stonp silt loam, 30 to 10 Verp deep, ~'cU-dramed, medium-testured rerv 0'r,o 60 Verg stony silt G ' 1n ,.nhr ~ t~,~,,,,.b~,o~ ' yy percent slopes, stonr aoil, parent matennl consists af loess, loum weers° ' 3p to fi0 20 ~o 10 to ..g G. 5 to 5 0. Ug t4 u ld 6. 6 to ~ _ . 3 3laderaie_-- Z,a~•. ' volcamc asb, and local cflUutiium, , cabbly lonm. - 5aC Spal:ane loan, 0 to 34 pesceAt slopes. WeA-rlrramed, maderately coarse testured sails 0 to 17 Laam to grasellq ,L_2 . _ I i 5pp Spwl~ane 1oam, 30 to 55 perceflt slnpes. fnrmed' frnm gramte, gneiss, sehisL, or acid sandp laam. g° f'0 9a ~0 to 8a 15 to ?fl 0. 5 to 3 0. 06 to fl, 10 G. 2 to 6.5 fligt~_e_____ La~-, i Aeous lacial wll, de th to hedrock ran es 17 to 25 Gruvell coasse . . Y , S F A B 7 I, G1i-GP---- d°L----- rQ to Sih 50 to 80 from 30 w 60 inehes. loamy sand. S to 10 a. 0 ta 10. 0 9. 04 to 0. Oi fi. 6 w 7 3 H+:~h.,----„- ~,an•. , SrC Spakane stOny loam, 4 to 30 percent $imilar to Spobane [aan soils, eqcept that the slnpes. sarfaee layer is 29 to 50 percent stanes. 5rE 5pokane stonp loarn, 30 to iD percent slape&. ` • ur . 5sC Spnksne comples, 0 to 30 peecent Spokane laam, ntoderate4r shalllaw, gart simil slopes. to 5pol;ane loam snils, escept that the depGh # 5sE Spokaoe complex, 80 to 70 percent to bedror,k is hetween 20 and 34 inohes. slffpes. 5pokane laam part is samdar to 9pakane lan,m • soils. $ - StC Spokane verp roc6} complex, D to 30 Spokane loam, maderstelr shnllow, part szmilnr , percent slapes. to 5palsune loam soi➢s, exoepti thas the depth . 5tE Spokane sery rocky eamplex, 30 to iQ to bedrnck is hetmeen 24 and 30 mches. • percent alopes. Rocb outcrap mcluded m these very racby 5uE Spo6•aue estremely rocky complex, ZQ complexes. - to 70 percent slapes. . ~ 5w8 SPrin dnie raveld saud loam Q to Samervbat escess~vei3 • drained ravell7~ mad- 0 to 12 Gravell caaxse ~ B 9 Y ~ ~ B , Y 51I-------- 4-1------ 70 to 8o 50 to 80 14 to ~0 5. ~ to 10. 9 0. 07 to 0. lp 5. 6 to fi. 0 Hig~------ Lnw. 20 percent slopes. eratelr enarrse testured soil developed froan sandr loam. ; g3acisl auGwash af acid igneous origim, occurs 12 to 46 Gravellp caArse ~ GlI-GF_... 9-1------ 65 t0 73 60 to 80 3 to lU ' an nenrlr leveh to gently slopmg glacial sand, I; >la 0. 04 to 0, 07 G, 1 to 6. 5 High Law. outrsnsh terraces. ~ (5xB ~ Springdde gruaelly sandy 4oam, deep, $imilnr to' Springdale graseAp sandq loam, ~ 0 to 20 percent alopes. 0 to 26 percens slapes, eeaept that the depth w ; grnvel and cQarse saod Ls m.ore thnn 36 inches. 5yB Springdnle cobbly snndy loam, Q to ?q 5imilar to Springdale gravelly sand~ lorLm, 0 to percent slopes. :0 percent :lapes, escept that the surface layer is cobhl}•. ~ I SzE 5pringdale gravelly koamy sand, 30 to SamewhAt e.tcessiucly drained, gravelly, coarse- 0 to li Gravellw Inamy A-1------ ip to 80 50 to SO 10 to _ °p "IO percent slopes. te.ttured sod aa tesrace bresks and steep sand. > la p Oa to 0, di f G. G to i. 3 Hi;n_______ Law. sloges af majar draia ewnvs; parent mate- 17 to 60 Very gravellr coarse uaad}• ac~d ~~reaus rock. sund. nnl domi ~-i------ 40 to sa 38 to 50 0 to IO >10 ~ 0. 02 to 0. 04 G. f to 3 Hi;h------- L4m. , TeB Tekoa gravelly silt loam, 5 to 20 percent lZoderatiely deep, medium-Ecxtured, well- p to 20 GrnveAT silt laaaa h~~5~i _ :lopes, rlrmned, yrravelly sotis developed From snnd- I, 20 to 38 ~'ery gravell} 4vam-- G1l-------- 9_'-- - 6~ ~o g~ ob to SO 40 to 60 0, 5 co ? a 10 1'_ to 0. l~k ;i, 6ta 7. 0 1Saderate___ Lac~•. Y i eC Tekoa gruvellv silt loam, 20 to 30 stone, quanz~ue, schist, or shule on hillr to 3o to 60 0 to 50 10 to 20 5, Q to 10, p 10. 05 to 0, PO ~5. Gta g. 0 High Lan, percent slvpes, mountainaus uplands- depth to sandsiane i eD Tekoa gruvell}• silG loam, 3d) to 55 bedrock ranges from 24 to 50 mehes. ~ I pL'PCCf14 5loQe5. , I ~ TKD Tekam ren• roc3;~ complee, 25 to 55 Tekoa part siw1Ar to Tekea gravelllv silt lonm • perceoc slopes. soils. Rocd outicrop meiuded in tih~s camplcs. UhA dJlilig silt loam, 0 to 5 percent slopes. ]7eep, medhum-textured, eve]l-dr~ned sa~ls 0 to GO Siit losm to ~•en• ~isie 'T[L ia CL._ :1-4 96 to 100 $0 to 95 aa to bU 0.$ to 0. 17 to Q.?Q ~ G. f to J. 3 lioderatc-° Lon to L'h8 ~ihlig sdt loam, 5 to 20 gercent, slopes. farmed irvm glacial ull miaed ~sith laess aud sundy loam. i r•oEcame ash in the upper parts. Aata alsa ap}lies to T7hLig part of Chene}• and Uhlig silt maderaie. ~ Pasms (Cn8) aud of Cbeney-Uhlig campice _ (CnB). ~ . UmC U'nlig'silt ]oam, moderaticl}• shallosr, a 5imilar to U61ig ssit loam, 5 to 20 percent to 30 percent slQpes. slopes, e,ecept that deAth to bedaoek ran;es . , ...~.-.t~. ~ ~ : rJ ~ I • ~ ; , ~ ~SFQKANE DUNTY, WASNENGTON - 5HE£7 NUMBER 75 . ~ I ~ . ~ ~r rl~~ • , ~'ii - ` o ,-I" - - - - y . R 44 E {lalns she8f 66) ~ yv^F ~ y w~. I~i~~, y.• 4p- _ . '~~•~)i' ' ~ w _ - r ~ GRAVEL ~ ~u^, ; 1',..~ r~ ~ r, • ~ ~ ~ ..-a. ' ~r~,~` ~ i . ~SE ~ ~I r.~~AC~ ~ - , • a" p~ ~ 1 • ' • ~ f er • ~ ~ Fr ! FIT gEF ~ ,r F ` M ~'J"~.~ Ap '"M;~;~,~`` :r"'_~.~. •i :,~"~i'f ~..i' .';r.~.~'''y~^.~ ;'r~: "A"~i'~~~ ~*~"4~. =yq.`.' "pti.~'?t ..L' ~~M1+ ~ yy ~`a'. I . . ~ _ . • ~ z /A r.ri~ ••~.c q ~ ' I ' r ~~6 - 1~ - - ..~y ` ~ . , n- e~.-~ . ~ ~•l1~~1~ ~.2ns_ ; ~ ' , i~._-~ie pT T~s : r.t~w_~~r t j~- 7ilPA11MEE . .S _ _ :.:......u.` ~ ; ' y •q ~ S, w q, is'~"PA ~s ~ ~ d.~. • , A~ ` tt ^ . "'t~C~ c PAC3FIC9 T' ~ t'~; ~ ~ ~ x i~~ ~~~r~,'~i~4~- 4' 3~i,'at`~! ~+~v,, 7~~!• ~'.~r".: . ~ - y~-.. ~y t y ~ ~ ~f na~'~ '7 '`;,l ~',a,~~• k~. r:~ = :r: _ S'S3L'~Jf~~ '+'s-S~Ll~tr'7S~x.:•'(~ .a ~~,~_~:i..- ~~v. ~id~n ~ ~ ~ ~ ~ ~ r ' ~ - ~ ` Y~•.:~ ~F~h - a~ ~ ~ ~ _ ~,'p^t 'c`~.~1~~~ ~H- r T~. •pi=,. ~y- 4r~ 7, ~ `~~u ~ l~~i,~s ~'ra~ • ~~y~".~p'}. ~ ~ :t' t ~ a ii ~ u ~:`'~"G ~ UnY' nO ~ ;.Jw '"°a~ ti' F - , ~ ~~-E.• w~~1. ~~P • . P~, ~ d .1, !'Y;; ~ ~ . ; r ~ ~ • ~ ; , L' a y~G ~f I e ,r• ,a; ;ti•. d.~ e~. :r: ~E~ >g...' . i~~.z' _ ua _ e t. ~~7 • t,'~~ -G~+ h q ~y ~ w '1 , o~;. r -r- I i - ~~y'~sY' L~'t~ ~5~'^.'"y~if L'~~•~ ~ti, 4 ~5~'~ °`4~~~,_'i~i ,~~J - I~ M~'t'~.~~p• l.r~ :~~,'~C , wC .4.~.N3~ ~SJ`, ~"!R .Y~_a~ ~ '~v~ w4~, i4±YV~~ .I~' `f~~ y ~.r ' Y S .l : ? . 4~ a t , ' S~ ~r ila ' „4r fr ~'1~4 _ ~P~ ~ -i•. ~I •T~ 1'"• ~y'~ y , '0. ~ g . ~ ~ ~ ~i~_ ' y ~~.~n~., ' ~ ~ ~fS, v ^~.r ~'w'r~~p'a~ ' ~ { ; ' ' ~ ' ~k I ~ ~.~_a~;~f tii . ~ ~SuE~1" ~~M;~,~;~ `:a=-~-p• •1 '.~.r e ~~at~sv~ , ~6~ IS~'-" nb~~ ~ ~r. ' :ifi1~ ~ a,• • 4, ~ c ; X.,~~...y~yh~'',~',,~. ty v „~eil~~ . .,~,••k ~ ; i • r ; ~ . ' ` aC~~~'j~~<~,.`,~,~~r' •5~ ~ ~ ~r~~a^ y ~T ~p~Y' s~~ ~ ~:~~G/lJ~~ 'y ~ ! e . T„ • .~f ~i v i •'4 % !'Y~ ~ s y f • ~I , r~ ~ ' ! ~d=i a n~~-;a.~ A~ ~°i' ♦ - ~ ~ _ Y4 ~ ~ . ~ Gm i ~ ~ y _a ~ :...J. . - s ~~'I ~ ti'S1~.= ' ~ ~ ~,~`t'•~r ' • ~ ~ ~~,yti .'1`'S ~ ~C ' ° _ . 14 r' tr . _ ~ : ` ~ • 'y ; .l. , c•r .p~, • y,.- ' ~ r ~r~~ ',7- .,3,~ _ , , , ^1p~~ ~ 3 ~ y Y,~v•I.L4 F 4 .r. ``i ^ _ ; ' .:A+~ ~ ' . ~54 1 ~ F ~ ~ ~ : 8 e ' S ~ sA ~ "L• ~ ~ p4'~ ,i ~ " ~ x . - }R 7 ~ ~ ~ ~ 1 I - ~,~eS7' ~r.-~ • , tr~ ~ ~~F ~ 4.~. j. ~ : " ~~1~;- ~^ie.y• ' - T~ . , ~P _ ~SSP~fµ ~ .4,~ - 4 ~r 11_ ''ae•'^ ~'Prs~ - TNEAlNES C£MBFEAr HhA ~x'S'~; ~ . F• r w',~ ;,r,~~:x ' • w+s'" 5I , 4'•f. 4.J i = ~ \ " ~•rt `~~`~••1- - m~r~; ..;~'~`~".~;t~ ~M '4~• y... ~ ° { - = I : \ 5t r~/"'''~' S - w• I~ ~ :t,. ~ ~ ~~3 _ ~ rTi 1Y 1. ~.s 'r ~ i' S~` • ,w~ - ' 3 ,r., • i ~ ~~S 1 ' ~ ,:~n.~ ^ ( . ^ S~ ~ • ~ v ~ t. ~s?~ ~ ~ ~i.:..~'~"'_'.r~ ~ ~ ~ ~,~n--~ , ~ {YSy~r~S a ~^r~..an C119 ~ s j."`SuE"t.•_~;~~~ ir ~ i.n: ` < < 'w, R~ ' ~ ;~V~ r'~K _ h~ ev~ - ILd . ? ~ _ . -~"F' q ~ ':w°_r ~ ' X.r - li . y , _ .+F! . "a~ ` h ^ L ~ :,.~.,,~y~ ~~'~`,~i ~4, • k~ , ~4 _ ~ I 4q j: ~~16'~ ~.y: ,~i.~',!~~ • ' ~ "'r';~,.,' I \ . , r a I ~i ' d1' W+1"Y•' 1;. R "y' r 1:,,• i F 3C- 5 - ~ B G a r q~' ' ~w P w~ . ' J•', ~ , e • ~ ~ k..T° ""Tc ;v-,'~.e_`~ ~ ~'`sk'~y~•~~Z~e~' ~1[ .,f•..,~`7'St:n7'r~y•~•~~ r~ ~~•wM~~ ~A - ~ ' •~v ~5,+•,y ~p~~.~ ;ya. ~•~e.., 'y~~' ,yr .2~^! ' ~i ~60~ - i ..l/ ~~eR` .,i~~ ..:.•Y~~;-~I ~ _ ~ +i ] fY"~i R,'~ ' ''~,r ;w~ ~ ~ ;7~~~~ "A~=, i"t.~ 1`' " ~ Y Z'~r"` '2`~ ; ~ ~ .t -~~Mc$'• ~.y=, ~ ~?I 4{~ w.1~ ~+y~:°~r:'.,~ h i 'w q r ~liAr.., ;~,^~Y~.:.: h~0 yVN~ ~ ~ .w.+ 2811 - i ~r ~ 1~k~ .~'r` ' , y Y y'a'•~`.~, w:;M ~"9 - ~ - { ; ~ -+r 3 i.-'.+-~°~• r:'i'. m . _ ~'~~if~,,~.•i• r.~~ ~~{S N~'`~. tx~,...r~~- '-~i.~ ~a~`. .:~.:i&. ;[:j'a;~ - .~~.r•'~f"snr.i:;.Y ~ ~ ~ ~ ~ •M'c r-''~~.y.'":.r_; .1 SxB;r:.~ • _ _ I 6 . ,r' ~ ~ ; ~ tMl~:w +v t ~ - SxB:~-: `ti : • g~ •~a,w~ 4'~ ~ '~_.a+~,. ~ ' ,4~ . . - . . . \ - p - j• .a" ' ,,'-:'.,r',...:' i - - " V~ ~ w i"• • r~~s" 4~ - - HhA~;~ . _ ~ , ~ 1.~,` ~w. r• ` r•a# • - ~ .d. . ~-j~~`''-~~'"9Ry~,~ ' - •F~,.' - . ' y~, 4~~ ~`a$.1-•; • I = ' q _ - a '~f , + A~a,++"~A~ Y r.~L =i - - ~ ; . F-°. • 'a tl~°,j4F ~s - _ ~ .Gu&' " r~~' ~7lM~. ~r`~ey ` „ ~~rC ~ - i 1 ' °g~ ' 4 - _ y ~ 7S~ ie''~ ~~~yl'w~ .t ,ry I ~V~1 T ~ M1p~Y . : 4~ y'-`'~' `•t ~N,~,r `~:"Sri :«..~{'`5.~.,~~ r~i + 4Jt: ti i ~ y ~r~lrl - - Rt! 's y{ 1 SP ~y..' 'y ~t ~w;yyg~ ~ c^ s Ai : _ _ ~-a _ , " } q~: _ - i. '=r:J - - . ' ~ -~.:tr - ';i ;:.~T-•- ~ ~ ~ l~;,~ , ' H~hA I. ~ ~yr• ; ~C; rh• , ° ~ l I :•~1 Ru ~ ~ ~ r • g • ^r ~ e. a ~ - •s ' ' - - - ~ S.'` • a , ...c;__. - - Sx9 Gm8 ~ o 5oC ' V;,_:~,'~..'~ ~ ' ~ ~ • , ~ 5T ' sp~. ~ - ~~;r:.,.~;' `.;~~t~ . . . ~ ADo. ~':.s.'-~`~1~r ►A 9a~ . ~,;'Ft _',~y - ► 'e ~1~1L.0 E ~~~~T ~u~' ADD`~"+\\~ RD ~ GmB ' '~ti~•'•o~ f. i; , 4;~; - " . ~ . . ' I~ 8& . .a~~,y,' ~ ~ ^ s:~~.ni ~\,\~'kl ~ BlC° ~ C~ kl Ca bESIEI° ' .'n"'~ `~':n f • ~$t L ~ ` - ° ' k~' 1 , SxB StE~ Sa9 - ~ i . W ~ i` ' ~ ' a. • . 34 " St~a PsA et~ Po. ~ ~ ~ S , ~ . ~ . ;f \ 7 71 • : ,Ca s _ ,`I - ~ ~ HhA ~ mi C a; " , " m. a`p~ ~ ' z ~ 1~ '4~ • ~:iy I~~ ca ~ . ''~y_. :;::~T.~';~ ~ $ . a, _ J~ ' w StC 1 .r w~'.1••, .`6~ '.~I~r~~;::Jr / "4~{`~ ' ~i`• . ~•GgA ~ Gm9 P5A ~ i. ti ~ 1 1 ' l Y A ~ Y X HO r • ~ . ,r. "w~a;^~~in~'.~I'' ~,1~ Yl ~ .~E'r., ~ rs f N 'w; r~p~ : ~1 ~g~ _ r_ ~ ::c~~;'r! ~ cr~,4t~:-~rf~'~ d~~ -'ar. _ ~ Ke ` - ~e. r~y~ , f~ l n i t r ~t„ ~'~~rN •'iti I ~ ,~SA ~ ,rF L"`-, Y' ~ ^ ~ ~ ~ ~ • r',I ' ~ ~ ~ i - ~aC . . • ~ i ~ ~ ~ CuB~ ~ "T t~:~•`,' ° ' r ~ rl~ ~tc~ Y , r a w is. ~~e~-",--- ~ y _ NcA~~ N~a ~ . 4tn ~+K:h ~r ~ • 9hO ~ i1~ •Ba~`~'~~ -o~ . 5tC ~~e r~ "•V~~~~ ! . ~,y-N 7~:,,~ y. i . ~ SDC~~AJ'.,~ BhQ A d~ ~~I.~ry ~'.„8:~ • 4,, N w.. . . ~ 7,° ~JL~''. _ I~ .~.i.,,! "u9. ~ .;~~~1...S:L•1''~ ' S~C , • _ Mrle Scsie i 20000 94) - - _ ~ . . ~ _ .