26019 PE-1423F RIDGEVIEW E #4
' STORMWATER T3RAINAGE CALCULATIONS
FUR RECEIVED
i
AP~ ~ ~ 2ooi
RIDC~~~ONT ESTATES N[3. 4- 7TH ADT)ITXON s~OKANE CoUnTvEyGruEER
NW 1i4 of Sec. 25, T. 25 N., R. 44 E W.M.
Spokane County, Washingtara
April 23, 2001 ~ ~ U-ILL
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Prepared ~ry; ' ~ • - ~ ~ ~ o ~ ~ i
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Simpsv~ ~n~~~e~r~, Tnc. ; ~ ~ ~a ! ~ ~ ~
North 909 Ar orane Road Z ~ ~ ~ ¢ ~ ~ ~
5pokane, ~'Vashingtvn 99212 0 i ~ ~ ~ ~ v ~ ~
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The design irn~arovements shown in this set of plans-6~ ~~~~~z ~ c~i ~
to the applacable editions of the Spokane Co~anty star +~ards ~r ~1C ~C U ~ tro ~ 00
road and sewe~- cc~nstruction and Spokane Cr~unty g a t~ r~Q x r cc
far stormwater management. Alt design deviattons have
, approved by+ the Spcrkane Caunty Engineer. I approve these
; plans for construction
1. Summary
11. Stvrrrawater l7rainage Calculations for Basins A1, A2, B, C, and I3
af RidgemQnt Estates Na. 4- 7th Additian
III. Attachments: , B. _
* kaadway 5urfacing lJesign
* Soi1s Map and Tabies
- - C~ ~
I ~0
, F lYrojccts l1 37M1 37 1 4-Z08 doc rE(plRE$ 711 -0
~ ~
Stormwater Drainage Report; Ridgemonr Estates Number 4-7th Additian
, T. SUMMA.RY:
The develapment is divided into four (4) basiras; A, B, G, and D. See Drasnage Map for Ridgernnnt Estat~s Nv
4-7th Additiran. Each basin is composed of two subareas; 1) grass 1awns, and 2} imperv iaus roafs, dnveways,
and asphalt paved streets. Starmvvater flaws Dverland across roofs, grass Iawns, and dnveu+ays and into grass
drainage ponds. Starmwater fram asphalt streets flows along the curb gutters and intv the grass drainage pvnds
thraugh curb apenings.
The grass perc4latiorr areas (drainage ponds) vvere calculated ta hold the first 112" of rannfall runaff aVer the
asphalt street areas.
Figure 2, page 6-3, of fihe "Guidelines far Stormwater NIanagement", by 5pokane Ccaunty Engineers, was used
for rainfall intensity and duration occurrang at a r(]-year storm £requency.
The Rational and Bowstnng Methads were used ta ca1culate the peak storinwater runoff for each basin, and the
type and numlaer of drywells needed for each basin based on the storage capacity of'the pond.
Xn accnrdance with "Sai1 Susvey, Spokane Gounty, VVashington", 1968, the soiP is categorized as:
GmF3, GarrisQn very gravelly lvam, sirnilar to Gari'ison gravelly loarn, eaccept that the
surface layer is very gravelly.
eonunents:
FQr Ridgemont Estates No. 4-4ch Addition, an earth taerrri was canstracted alung the west plat 1ine (east F.lW
of Pioneer 5treet}. This was dvne tv prevent offsite runoff frorn flowing cantv R.E. No. 4- 4th Atiditi4n. I 5ee
offsite drainage map (Basin W) done in 1992 for R.E. No.4 - 4~'' Addition.) The offsite runoff is ponded
behinti the existing earth berm. With the addition of Ridgemvnt Estates Nn. 4- 7jh Additian, a portivn of the
eaaz-th berm will be reiocated tn tIne svuth plat line of R.E. Ner. 4- 7`h Addition to prevent offsite runoff from
flawing vnto R.E. No. 4- 7`'' Addition.
C}riginaily, Pioneer Street was gving to extend fram Sta. 11+58, but Crace Ha.rUest Church purchased this
prvperty south of R.E. No. 4- 7`h Addition, anti it appears that Pioneer Street will mat be extended. Grace
Harvest Church will be respansible far storrnwater eonsideratians sauth of R.E. Nv. 4 - 7~' Additiara.
The pond in Basin B was originally canstructed to coPlect runflff firam 20th Avenue (Basin A) of R.E. Na. 4-
5`b Addition. This pand will now be enlarged to accommodate a small amaunt of addiiional runpff frorrr
Pioneer Street.
IT. STC)RMWA`7'ER 17Rl4INAGE CALCL]LATIONS:
Basin A-1
Area
Tota1= 94,506 sq. ft. - 2.170 acre
' PaVement = 21 st Court = Sta. 5+05 to 7+95 = 6,895 sq. ft. - 0.1 583 acre
DrlVeways = 4 112 driveways at 1,000 sq. ft.Ikiouse =4,5(l0 sq. ft. - 0.103 3 acre
Roofs = 8 l i2 rovfs at 2,004 sq. ft.lhouse ~17,{][l0 sq. ft. - 0.3903 acre
Impen+ious = 6,895 sq. ft. + 4,500 sq. ft. + 17,004 sq. ft = 28,395 sg. ft. - 0.6519 acre
Grass Lawns = 94,506 sq. ft. -28,395 sq. ft. =66,111 sq. ft. - 1.5177 acre
Storaze Fteauired:
a) "208" Storage Required =(6,895 sq. ft.)(212"=12 in. per ft.) _2$7 cu. ft.
b) Bovvstring = 441 cu. ft. +2 L)ouble Barrel Urywell, Type F(2.0 cfs out)
Storap-e Fr4vided:
Pand, 6" deep, (2[}'){30'}(0.5') +(2{]+30+20+3D)(Q.375 ft.) = 337 eu. ft. > 287
Fond, 8" deep, (20')(30')(0.67') +(20+30+20+3Q)(0.67 ft.z) = 469 cu. ft. > 441
_ 3 0'
LW 20'
_ ' I x
1W
~ 2.00 ft.
P_ 1.5 ft. _M
6' "f
3: 1 6" _ 0.5 ft. 0.67 ft. 3: 1
r (112)(1.5')(0.5') = 4.375 sq.ft. (1f2)(2.00')(0.57') _ 0.67 sg ft
H. STORMV4+'ATER nRAINAGE CALC[JLATTClNS: (contir►ued)
Basin A-1 {continued}
Curh C]penine an Continuaus Grade. Sta. 7+82, 7+95, and $+08, 18' left, 215` Court
a= 2 in. = 0.17 ft. Flawline depression at oper►ing
y=0. Y88 H. Depth of flow in normal gutter
Q= 1.98 cfs Design discharge
Qra1La = D. 12 Frorn Fig 16(a), page 6-39 "Spokane County +Guidelines fQr
Stormwater Management"
L = Q1(Qa/La) = 1.98f0.12 = X 6..SdJ ft.
Construet Spokane Gounty Tyae-P Curb Inlets, 3@ 5.5' each = 16.5 ft., $ in. deep
i
❑E'FENTIUN aAwIN DESiGi+l: RA7IOMRL FQRML,fLA ki7f3RQLDCiY $e B[}WS7FtIAlG AETMOD
DRAIN4C3E BAS1N ANALYSIS far 101'FAR ST'ORM EVENF
Data. 5= P[+opC1 fdam. RidgemssrA 6staites 04 - 7th P1dddton
Joh Po 13714 PrrSjW4pcali]n: 21sC Cok[rt aftd Pi0I1ae7
C?esigner J Yaurg Drernsge Bas€n Naffw: Bmtn A4
l7isk Rlr PPropects.draincals.19714 Drelnags Basin Descriptlon: Orrsde
Fl laname 13714a7.)ds "208" ROAding RFaa f+rame: ••►l1°
For RidgertlDM EsWtes Pnnding Area LocatDn: Noith sde o[ 29 st C-ourt
Poirrt of Caraenfre#an: Law Pt, 7+95, t.ft.
Sil9RREPe5 T11VIE C]F pO1JCEP[TRAIIDId d'Pc). minutm
OesarlPlinrP I4cres C A,C [Arerlered Flane Chau[rei Flox
rjmgYot{s '2D8" ►A' 909mat9 B: L3 - 258
RspW Pavemerri 6158 0.90 0.142 Gt= i7.15 Z4 = 0173
- C#r'sw-ays 0103 4.50 0.093 L1(A) = 245 Z2 $ 38
Grass Lawn 'f 5'18 015 0.228 N(A) _ 04 130 fl
Ftoufs 039D 9M 0.351 S(A) R 6.054 n a U.016
Tc (A) = 5.64 6 = 0 627
OUrer Arws' d a 0.199
S'Arman18:
L1(B) = 0 Fo (th ) 1.34
N(B) = 0 Tc(A*0) ' 564
S($) a 0 Tc tn!!aE 697
Tc (B) a 010 lrfteresftY' 2 81
Toft9 8asln Area, eares ~ 2170
Compostte RurtofE Coefl'scEgriS m 4.38
CsimGlrred (lma "RunatF Coefficier#) ~ 0.814 0 (estimaie8 @ d) d 225 c f s.
Tirrre of Concenlredlan ~ 597 minutes
'aW DRA1NpGE PARR'AETERS
fmpervenus `2W Awe m 8,895 eq II REAFC 4fSCHARi'aE 90 YEAR gTORFA
"2fl8' Volume Prwlded a 337 [:u. R. at 8" depih
- Sbrsjm 5forage Provlded = 489 cu. fl. st 8" [ePth Qg C' l*A Q 228 C.F.S.
BOWSifMA1Ca CALCU1J4TI[ONS
a1 #2 93 #4 95 98 87 PIUMBEFt and TYF'E al [3FtYWELL3 PRDPOSHd
, rme Ilme rmenstly a eev viR v ort soor~
Inermrtt. tnommr. o rAngle-Ba►ree (spokane r.ounty rypo a)
- - (mtn.) nnJhi) tcFsr (c, (t,) (ou. ft.) ;cu. ft) a ~ble-Barral (s~e Cwrr[r B)
W~ (A*C*Of 05-w
e.97 436.44 281 2.29 1283 M17 446 O,nnow PmAded: zc.rs.
s 300 318 2.69 taat sm 441
10 6DD 2.24 1.82 1354 120a 954
15 900 3.77 9 44 15M 460D -288
20 9200 145 918 9585 2400 -895
, 25 15M 1.21 Um 1818 3000 -4382 '20B" TREpTkTPlfi YOll.L1ME
30 1800 1.04 0.85 18-05 3800 •1955
35 2100 0.91 0.74 168`2 4200 -253B Reqwred G.PJL poredmg +rolutna:
dA 2400 4.82 0.87 1MB 4$04 -31[)2 Impersrirkm "208" Am aa 11r c 287 cu R
45 770D 4.T4 0,60 1713 5400 -M7 ►rolurre prsvided st fi" deplFr = 337 cu fE
50 3DDO 0.68 0.55 1740 SOW 4260 D3tf
55 33M 0.64 0.62 1794 66DO -48M
60 3500 0.61 0.60 1859 7200 -6341
65 39DO 0.60 0.49 1975 78U0 -W5
- 74 4200 0.58 0.+47 2051 8404 -6348
75 45tK1 4.58 0.48 2117 OM a6883 5TORM STORAGE kIDLU9iiE
~ BD 48fl0 0.53 0.43 2133 98M -7451
-86 5100 452 0.42 3220 10204 -7980 IYbmximum Otatap requ3►ei = 441 cu. R.
90 5406 060 0.41 2457 908f14 -8543 wSume prani[1ed aS 8' dspth u 459 cu. ft.
~ 95 5700 D 49 (}.40 2337 11400 4M OKI
100 60M 0 48 0.39 2401 12ODD -9m
• slmFsarr,6rrginmrs, rrm 909 Wcsrtl, Argonne Roar1 SpoRane wA 99243 (MJ 926-1322
SII71NiJG- ~7nR1
i
RATIONAL F4RMill,.A HYDRQLQGY
DftAfNAGE 13ASIlV APlALYS48 far 40 YFrAR 5T[3RM E°tilENT
Date• 5r2= PmeCt Name. Rfdgerrom Estates Nv 4 7th add.
[?eslgn: Itwm Rrooct tVurrther: 13714
~RW P'1p~1 97 1 811 97 1 W_fft Site Louit[on' N1N 514, S. 25, T. 25 N., R 44 E W.M.
I BASFfk NaR19. °A'i (CWhy" $aSIR RE3CrIptiQi1. AIOItI1 Slde 91 21 St G4uit
~
PoiISt ot CancentfalfvTl: Low PE., 7+95, left
suaAReAS• Intensih+-qu,a#ttin for 90-mr Stvmt EverrF
DesC"m Ar►es C A'C
- Tirne TIrre Intens[y
Incrannt. lricimnt
Aspkaft Pavemerrk 0.158 090 4.142 (min.) ~sec.] (in./hr)
Dnveways 6.103 0.90 4.093 xi'sT
Grasa Lawn 120B 015 0.184 7.02 421.39 280
Roofs 0.321 0.80 0.289 5 30D 3.18
10 BOa 2.24
i 5 9DO 1 '77
20 1 2DO 1.46
25 1500 1.21
30 98LDL1 4.U4
ToW Basin Area, acres ~ 1.791 35 2100 0.91
Compaaite Rurtoff Coe'fficlent = 0394 40 2400 082
Combired (Aree ` Runofl Coa'FfrcieM) = 0.706 45 2700 0.74
, 5(] 3000 0 68
~ 55 3300 0.64
60 36ao 061
TiME t3F CONCENTRRTk[3N (minules)• 65 39DO 060
- - 70 a20D 058
Tc (over[andffow) Tc (gutterllow) 75 4500 O.aB
' SD 480(l 053
Ct = 015 L2 r 258 85 5100 0.52
- Z1 ~ 0172 9[1 5903 050
' 6.9 (A) = 245 Z2 = 38 95 S700 049
_ N(A) = 4.4 B= 47 100 60DO 0.48
S(A) ~ 0054 n = 0016
, 6 = 0.027
, Yc(A)= 564 a= 01ea
L, : 0 TC cg,ut.y 1.39
N(B) - o zc(A.B) - 5.64
, s(s) = a rC totai 7.02
I lntensfty = 2,$0 PEM pLSCHARGE, 10YF-AR 5TORM:
TC (s)= 0.0 Holding 9.19
Qg c • i • A_ I." es.s.
Q[esttmated @ d] = 1.98 c f.a.
- Time at Conoentratkm = 7.02 m9rsuDes
, i
hfote: rne otFer 0 3788 acres are noWrig overtand straEgr,t 3rft tha pond
i
Ai[~r4F
QEPTF! aF FL(7W" - y , FEET ~ ~.If3$
01 OP 03 Oa 05 .06 .08 .10 I- ~
I 3 4 5 _6 .7 8.4 d.[?
1.0
r -4-
~Tt'
4-1 ~ 5
J-~ ~ .a
i-! .3
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i ~ I c~a
2
~
Lo
c, .1r a.tiz
j.os
L • ~ ~-Y i
.05
~ aa
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as
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, 1 I I~ I~I a I T I A I~~ i I ~ s I pl
;
1 I ' I`n
I- ~
(o) C31SCkARGE PER FOOT OF ~
LE NGTM OF CUR6 t3PENING
E'NLEZ5 WHEN iNTERCEPTING
5
10[3 °a OF GUTTER FLaW
E 1 I Q
(b) PARTGQL tNTERCEPTION 1 -.a -
' RATIO FOR tNLETS OF Qa
LENGTH LE55 THAN L'0 2
-
~ or
~
10
- .0e .06 .Qa .ia .z ~ .4 .s .s a 1.0
L/
' $as►~, A- 1 La
CARACITY OF CURB DPENING INLETS
_ DN CONT1fVUDUS C,RAL7E
5-39 FIGf1RE 16
~ Basin A-2
' Area
'---I Tatal = 52,644 sq ft. l 21 acre
, Pavement = 21 st Coutt =Sta. 7+95 to 9+$2 l 87'){ 18') = 3,366 sq. ft.
~ Pioneer St = Sta. 16+78 to 20+(}0 =(322')(18') = 5,792 sq. ft.
Fillet (20'){20'} - (r14)(ic)(20)2 = SG sa. ft.
9,248 sq. ft. - 0.212 acre
Curb and Sidewalk = (220' + 31.42')(6.5') ~ 1,634 sq. ft. - 0.0375 acre
T]riveways = 2 driVeways at 1,000 sq. ft.]hvuse r 2,000 sq. ft. - 0.0459 acre
r- Roofs = 4 roofs at 2,404 sq. ft.lhause = 8,040 sq. ft. - 0.1837 acre
- Impervious = 9,248 + 1,634 + 2,404 + 8,000 = 20,882 sq. ft. - 0.479 acre
Grass Lawns = 52,644 sq. ft. - 20,882 sq. ft. =3I,762 sq. ft. 0.729 acre
5torap-e Reauireti:
a) "20$" 5torage Required = (9,248 + 1 a634 sq. ft. )(112"-1 2 in. per ft.) _ 453.4 cu. ft.
b} Bowstn'ng = 391 cu. ft. + 1 I]ouble Barret T]r}well, Type B (1.0 efs out)
5tora,Qe PrvvIded:
Pond, 6°° aeeps [(34')(20') f (9)(14) + (112)(9)(6)](0.5°)
+(20+34+11+14+43){0.375 ft.2) = 462.25 cu. ft. > 453.4
Pmnd, S" deep; C(34')(20') + {9}(14) + (112)(9)(6)1(0-67')
+(20+34+11+14+43)(0.G7 sq. ft.) = 639.85 cu. ft. > 391
; 41'
I GWy L01
i 3`tr
2.00 ft. _I
L.s ft. d
i ~
)A
3: 1 6" _0.5 ft. 8" = 0.67 ft. 3:1
R
(112)(1.5')(0.5') = 0.375 sq,R. (112){2 00'}(0 GT) = 0.67 sq. ft.
i
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' ' H. s~ORMwATEx DRAIvAGE eALcvLArzoNS: (continuea)
Basin A-2
Curb rJnerginp- at Low Pnirat, Sta. 9+46, left, Z 1'; Caurt
h= 8 in. = 0.67 ft. 'I"otal hei gfit vF apening
, H= 0.156 ft. L)epth of water at entrance
Q= 0.9$ cfs +Q 06 = 1.04 cfs Total peak rate af flaw
' Q= 3,087(L){H}102 for Hfh <1, 0.75610.67 =0.23 <1
L = Q ! (3.087)(H)31 - 1.04 - (3.087}(0.156)311 = 5.46 ft.
Canstruct Gurb dpening; 6ft. wide, 8in, deep
Curb dJnenin2 on Cflntinuous Grade, Sta, I7+21, leffi, Pioneer St.
a = 2 in. = 0. 17 ft. Flowline rlepressian at opening
y=0.095 ft. 'L7epth of flow in normal gutter
Q = 0 59 cfs Ilesign discharge
Qa1La = 0.064 From Fig 16(a), page 6-39 "Sgcrkane Caunfiy Guidelines for
Stc~rmvvater Management"
Fy = Qf(QaILa) = a.591f~.fl64 = 9.2 f~. -
Canstruct Curb Opening; 8ft. wide, $ in. deep
Use 2 Spokane County Type-2 Curb Inlets, 2@4' _8'
CJLa = $.q 1 9.2 - 0.87 = (0.87)(0.59 efs) = 0.51 cfs into inlet
(0.59 cfs) -{0.51 cfs} - 0.06 cfs flowing to 219t Court opening
~
~ I
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DETENTION BASlN DE51GAf RA71QfVAL F(]RMULA HYC7RQLpGY $BOWSTRING METHpp
i []RAINAGE BASIN AkdALYSlS tar 10 YEAR S7f]RM EVENT
- oate 412Mj Project Nama Ridgemnt E5lates #4 - 7th AdditiQn
, Job Nv 13714 Praaect Lucat{on 29st C.ouri and Pioneer
Designer: J Yourig Drainage 8asm Name Basin ,42
C7isk ❑ir PPrfljecls dralneale 13714 Orainage BaSin Descnpfron Dnsifa
Fpename 137140 xis "209" Panding Rrea Narrle "A2" ~
Far Ridgem6ns essates Pvndrng Area Lacairors North sids of 21st Cavrt
Point vf Concentraiipn Lrnv Pl, 9+46, Lft
I
, SLJBAREAS TIME OF CONCEIdTRAT1ON Cfcl. mrnutes
Deseription Acres C R'G Overland Flrsw Chann2l Flmnr
lmnerwous °208" Areas S?.oment A. L2 = aso
ASphal[ Padement 0212 090 0191 Ct = 015 Z1 = 0172
Curb and Sidewalk 0438 090 0034 L1(A) = 0 Z2 = 36
Dnveways 0046 090 0_04 t N(A) = 04 B= 0
ftppf5 0184 090 0 155 5{A} = 0 445 n= 0015
.~'arass Lawn .729 015 0109 Te (A)= 000 s= 005
d = 0157
O€her Areas SeamerrP 8
L1(B) = 0 Sc {eh J 1 15
N(B) = zc(A+e) 0 00
5[B] = 0 Tc katal 50Q
Tr- (B) = 00 Inlsnsity 3 58
Tvta! Basin Area, acxes = 0 439
Camposite Runafi Coeffiaent = 113
Comhineci (Area ' Runoff Coeftent) _ 0541 ❑(esfimated Q d) = 166 ci s
Tvre ofi Gonr,entrafEOn = 500 minufes
"20$" DFiAINAGE PARAMETERS
Impert«ous '208" Area = 70,882 sq ft. PEAFC OISCHARGE, 10 YEAR STaRNB
'248° Vo[ume Pravided = 462 25 cu ft at 6" depth
Sform SFOrage Pranidsd = 639 85 eu ft at S" depth Q= C' I" A= 9 72 C F 5
BCIWSTRiNG CALCULATIt]NS
#1 #2 #3 #4 #5 #fE #7 NUh18ER and TYPE [rf DR'YWELLS PROP0SED
i i Time Time Intensity q dev V m V out Storage
' Incrmnt €ncrmnt 0 5mgle-Barre! (5pokene Ccrunty Type A)
i (min } (sec ) {inJhr} [cfs] (cu ft.) (cu ft ) {cu ff } ] Dauala-Barrel (Spokane Cvunly Type 8)
{#5'60) {)VC14r33 [a+N`32S [A5-45]
_ 500 30000 318 1 rz ssi 30000 391 aumQw Providad y c.r 5
5 300 318 1 72 891 300 391
10 soo 224 1 a, 850 soo zso
15 9oo 1 77 096 959 900 59
20 1240 1 45 078 1021 1200 -179
i 25 1500 1 21 4 65 1049 1500 -452 "208` TREATMENT VQLllME
' 30 1800 104 056 1059 1800 -731
~ 35 2100 091 049 10$3 2100 -1017 Required G P A ponding vofume
40 2400 0 82 044 1109 2400 -i291 fmpenrrous "208" Area x112° = 453 cu ft
45 2700 0 74 040 1121 2700 -4579 vv]ume prayded at fi' depth = 46225 cu. ft
50 3[]00 068 037 1140 3000 =9860 pKI
~ 55 3300 064 0.35 7177 3300 -2123
~ E0 3800 064 0.33 1221 3600 -2379
85 3900 060 6 32 7238 3900 -2602
- 70 4200 058 031 1343 4200 -2851
75 4506 056 030 1393 4500 -3107 STpRM $TOfiAGE VOLLIME
80 4800 053 029 1404 4800 -3398
SS 5700 0 52 028 1462 5164 -3638 Maxirrium storage requieed = 397 cu ft
90 5400 050 0 27 1487 54pp -3873 volume provided at 8" depth = 63985 eu ft,
85 8700 049 Q.26 1537 5700 -4783 OKi
I 100 8000 ❑ 48 026 1583 5000 -4417
Sfrnpsun Engiaeers, Inc. 309 North Argpnne Rvad, Spokane, WA 89212 (549) 326-1322,
, i ar1asa as - B-A2
i ~ .
ftATIpNRI. FqRINUTA Hl'DitOLOGY
, pRAINAGE BA51N ANALYSfS tor 10 YEAR STC7RM EVENT patg- 616100 Projest Name Ridgarnarst Estates Na 4 7th adsi.
i Design kwm Prnject Mumber, 13714
~FM 5'1pMJects11371dVt3T14a1 ads Sife Locatinn NW 114, S g''a, T 25 N .R 44 E. W.AA
i B"rr Name' "A2 (cur6)° Basin Descripcion Marth side of 21 s4 iGourt
PQmt of Carsneritraticn Law Pt, 9+45 7, LR.
i '
5U8ARFA5• Intensty-Ouratii+n ftsr 10-wear 5torn Event
qescription Acaes C A'C
Time Time Iritsnsiiy
Incrrnni Incrcemt.
,Asphal! Pavement 0.095 090 0 085 [min ) (sec ) (in.lhr)
E7rTvswrays 0046 490 0041 (as*SDI
GrassLawn 0536 015 0080 617 37022 2,96
Roofs 0138 0.90 0.124 5 300 3.18
10 6m 2.24
i t5 9m 17]' ~
2D 1200 145
25 1500 127
30 1800 104
Tota1 Basin Area, acr$s n 0814 35 2100 091
Composite RurwfF Coe~'tcierrt = 0407 40 2+100 082
Cambirred (Area •Runaft Coefhctent) _ 33T 45 270D 0 74
50 900fT U.68
` 55 330D 0 EA
' sD 36M o.si
~ i TIME OF CONCEfVFRATION (minutes)• 85 350£1 0.60
70 4200 0 58
Tc (vverland ffonv) Tc (gufter How) 75 45U4 ❑ 58
~ 84 4800 0.53
Ct = 015 L2 = 104 85 5100 0.52
Z1 = 8.272 9i1 6404 050
L1 {A} = 244 Z2 d 36 95 5700 049
i ~ K(A) = 04 s= o 100 6000 048
s(A) = 0062 n= 0016
- g = 0018
Tc (A) = 5.40 [f = 0156
, L1(5) ~ o Tc (gut.) 0.77
, fV{B} = Q Tc(A+g)' 5.40
S(B) = d Tc tQtal $.]7
irFterssit+yr : 2.96 PEA!{ DISCHARGE, 10 YEAR 5TC)RISA:
Te (6) = 00 Halding 3.71
' @= C• I° Az 0.98 C.F.S.
@ {estlmsted @ ci} ~ 0.9$ c.F.s.
Tirne of CnncerdraLan = 6.17 rninutes
Note. The other Q 3947 acres are flov+nrtg averland straight irna ths pand and lnfo r.ur6 inlef on Pioneer St
' (0.2630 acres ars flowing ❑vertand and 61317 acres on Fioneer S8 )
i ~~u~
i
_ DETEdelTIQRJ BASIN C}E$I,("aN RATIQMA1. FOR1v1l1LA HYCi}7(]LLJGY 8 BCIWSTF2IAlG ME7H[!D
~ DFiA[IVAGE 6A$Itd RNALY$3S far 10 vEaR $TpRM EVE7dT
Oate 4rz6lat ProjecR hlame Ridgemons Esta[es #a -7th Addiuon
Job Np 93714 Prolec[ LocaEion 21st CouRand Pionaef
I
Oesigner c Sunpson Drainage Basin Name Curta Caleulatinrss for Piuneer-6asin Ft2
orsk Dir P Prqp.ZtB brdiftpIC13794 Ordinage Basm Oescnp6an qnsite
Ftaname 13714a2-cvropxis °208" FQnding Area P1ame ",42"
- Fw %dgenent Estates Panding Area LdcaUnn Nurtn sEde of 21 st Court
~ '?oini aT Concentrdtcpn Low pL, 17+16 5, Ltt., Pwneer Rd
SlIF3AREA5 T[ME OF CONCENTRATIC]N (Tc), mmutes
aescnoUOn Aaes C A'C Overlartd Fiova Channe6 Ffaw
lmaerv+ous '209°Areas 5evmant A i2 = 260
_ A3phal€ Pavemen[ 0116 090 0104 Ct = 9 15 Z i= 0172
Qnvoways 0 000 0 96 ❑ 9V0 L1 (H) = ❑ 72 = 96
GrdsS La+nm 0 000 015 0000 tJ(q) = 04 B= 0
~ Roofs 0046 0 sO 0 E341 5(p) = 0045 n= 0016
Te (A)_ 000 s = 005 ~
Ofher Areas d= 0095 4-~
Sidestialk 0044 090 0040 Sevmen! 8.
lS(6) = G 7c (Ch ] 1,62
N(B) = D Tc(R+B) Q Oq
St6] = 9 Fc [olal 500
Tc (S)= 00 In1E€tsiry 3 18
8asin Area Flowrrtg mtp 56eet, aeres = 0206
Composite RUn0ffC06f{iGBrtt = 0 99
Com6insd (Araa ` i3urrpfi Goeffcient) = 0 105 p(esUmat8d Q d) = 043 c! s
' Ttma oi Cancentrahon = 500 minutes
"208' QRAINAGE PAF2AMETERS e
Impervious "208" Area = 4,5E6 9q ft PEAI{ pISCHAI2GE, 14 YEAR STORM
_ '208' Volume Pmvided = ❑ cu ft, at 6depEh
' SYurm SEprBge Procnded = o cu it, a3 8' deplh Q= C' I' A= 059 C.F.S
BOWS7RING GALCULRTIphl5
M1 #2 #3 tJ4 #5 #6 #7 NLIMBER and TYPF pf pRYWELLS PRpRC7$EO
Tima TEme InD2nsily ❑ dsv V m V Wtt $tprgge
tncnnnt Incrrnnt 1 Single-Barrel (Spolane Counry Type A)
_ [min 1 [s~ 1 CMJM (cfs} (cu ft} [cu R} (cu 2) Q Doutde-Barrel (Spokane County 7ype S)
(al'6a1 {A'C'rsS fouo 1921 f=s-Iti1
500 30000 3 18 059 237 9000 147 C7utllauv Prrnvirled 03 c f s
, I 5 300 3 78 0 59 237 gU 167
10 600 2$4 041 291 'SSCf 7l1
~ 15 300 1.77 033 328 270 56
20 1200 1 45 027 949 360 -11
25 1590 1 21 022 359 450 -91 '208" TREJI:CMENF VpLLfM
i 30 1800 1 04 019 366 54 0 -174
~ 35 2100 091 017 371 830 -259 Required G?A ponding vQluma
40 2400 0 62 f} 35 380 7~ -340 Im~rnpus'2LIH° Area k ti2" = 197 Cy ft.
45 2700 0 74 014 384 91Q -426 vpfume prQn9ed at dep 0 Lv R
'Sa $OOU 068 0 13 390 300 ,aiU ❑Good
55 3300 4 64 l7 12 403 990 -587
6B 3660 067 011 418 mso -662
65 3900 060 a 11 944 1170 -725 ~
70 4200 a 58 ❑ 11 462 4280 -398
75 4560 0 56 ❑ 1U 477 ] 350 -1373 STORtsd Fa7t3RHGE VpWME
SO 4800 053 010 481 1440 -959 , 85 5100 052 010 501 1530 _1029 Iafazmum storage required 147 Gu Tt
90 5400 0 50 009 509 1620 -s 7 7 i volume qiCividsd at B" depih = p Gu ft
' 95 5740 049 009 525 1710 -1584 No Gavd
100 6000 048 0 05 542 580e -1258
Sjmpson Eagfneers, [nc 909 Narrh Argonne Road, Spokane, IN'A 99212 (509) 926_1322
I I
i
1]llF~oeep.~ 9pn,~
I I
pEPTH OF FLpW - y- FEE[T~
DI .GZ 03 nn OS .06 98 .10 C) J~ 3 4 .5 8 7.8 4 tfl
q
;-Ti ~ ~-T1 ~ ! .e
.6
~-L- I -
- ~ . 7rt 'f` -T . T .
J~ I - ~
~ . h --I f 5
~ !"i ~ i ~ E
I ~
rL] j
~ F 4 I I! I ~ , ~ k 1
.3
2
+ Q
La
10
-da
4r
' os
.05
04
03
~ 02
00
I,~ I + I I I I ] I ~ I I~ 1 i I C li f
oi
10
( o ) DISCHARGE PER FOaT OF
LENG7M pF Cl]RB OPEMING
INLETS NVl~Ef~ INTE~'CE~'TIIVG s
~ # •
~ 1000/a aF G1JTTER FLQW
~ 4
Q
~ ~
/i ~ ~ I I I
(b) RAIRTIAL iAETERCEPT1DN + ~ ' I t I ~ ~ ij ~ ~Q
' RATEO FOR INLETS OF
I
LENGTii LESS THAN L I
Ieoo I1-- -.x
F
L
-'010~ f~
~r r ~ i r ~ I 1 I
o,' .10
os .od .os io .2 3 .a .s .6 .a i.o
L/LA
E~ CAF'►4CfTY OF CURB [}FENdNG ENLETS
ON CQNTINU4115 GRAaE
6-39 FIGURE 16
II. STC3RMWATER DRATNAGE CALCUI.ATIC)NS: (cantinued)
Basin B
_ TQtal Area
Tota1- 28,852 sq. ft. - 0.662 acre
Pavement = 20tr Avenue. 400 lf = 7,200 sq. ft. - 0.165 acre
Curb and Sidewalk =(398' )(6i-5°) = 2,587 sq. fl. - [].0594 acre
Driveways = 5 driueways at 1,000 sq. ft.IhQuse = 5,000 sq, ft. - 0. 114$ acre
Roofs = D roofs at 2,000 sq. ft.fhouse =O sq. ft.
Lmpervious = 7,200 + 2,889 + 5,000 + f] _14,787 sq. ft. - 0.340 acre
Grass Lawns =28,$52 sq. ft. - 14,7$7 sq. ft. = 14,065 sq. ft. - 0.323 acre
Stvrap-c Required:
a) "208" Starage Required = (7,200 + 2,587 sq. ft. )(1I2"-12 in. per ft.) = 407.8 cu. ft.
b) Bowstring - cu. ft. + 1 Singte Barrel I)ryvaell, Type A(0.3 cfs out)
Total Storaae Frovided:
Pcand, G" deep, (752 sq. ft.)(0.5') + (126')(0.375 ft.2) = 423.25 cu. ft. > 407.8 cu. ft.
Pond, deep; (752)(0.67')+(126')([?.67 ft 2} = 588.2 cu. ft. >507 cu. ft.
, 49'
; 16' 16'
45y
2.00 ft. =I
„
1.5 ft.
- 3: ~ 6" _ 0.5 ft. s:° _ 0.67 ft. 3: r
(1/2)(1.5')(0.5') - 6.375 sq.ft. {112}(2.00r)(0.6Iy) 0 67 $q' 1L.
11. STORMWATER DRArNAGE CALCLTLATI(]NS: (continued)
Basin B (contiaued)
! Curb Otaemm! at Law Paint, Sta. 14+0$, right, 20`h Avenue
h= 8 in. = 0.67 ft. Tata1 height of opening
H= 0.184 f't. Depth of water at entrance
Q= 1.12 cfs °I'atal peak rate af flavv
' Q= 3.Q87(L)(H)3rz for H1h<l, 0.184i0.E7 =(].27 <1
L _ Q - (3.{]87)(H)312 = 1. 12 - (3.487)(0.184)3iz - 4.60 ft.
Construct Curb C}pening; $ ft. wide, 8 in. deep
L7se 2 Spokane County fiype-2 Curb Inlets; 2@ 4' = 8'
QETENTIDN BA$IN DESIGM RATIClIdAL FOi2NiULR HYDR{]LOGY & BC1W53RING METMO€7
F]RA1NAGE 6ASIN ANElLY515 for 10 1fEIkR STQRNI EVENT
oate 4120101 F'roJect I+iame. Ridgsrrinnt Estates #4 - 7th Additioes
Jah No 13714 Projecf Location 21 st CauR and Pianeer
pesigrier J Ya,ng Drainage 8asin Name, Basln B+ Runoff from Ridgemont Estates Na 4-Sth Additlrsn
Disk OG P Projects drafrcafc 73714 Clrainage Basin Cescnption, Qnstte
Ffierame 737748 As "208" Ponding Rrea Narre °B"
Far• Ridyemom Estates Poncfing Araa Location, 20[h Avenue
Parnt of Corscaerstrattvn. Sta 14-+08, nght
Si1BAREAS TIME OF COAICEId7RATI0N (Tc), rtunutes
Descnptian Acfes C A'C Overland Flcnnr Channel Flaw
fmoenvfous "208" Aress SeqmQnt A. L2 ~ 355
AsphaR PademenS 0 165 0 30 0749 Ci = 015 Z7 = 0772
Curb and 5tdeavalk 0.059 030 0053 L1[A] _ 0 Z2 = 36
[3nveways 0175 0 90 4 703 N(A) = 04 B= Q
Grass Lawn 0 323 015 4,048 5(A) = 001 rs = 0015
Tc{A}= OOD s = 0015
d = 0 184
QlherAreas 5eamerrt B'
Lt(B) = fJ Tc tch ~ 260
N(g) = 0 Tc[R+B] 000
S(B) = 0 Tc total 500
Te (B) - 00 Inlensity 3 98
TptalBasin Area, acres = 0662
Composite Runaff Coefficient = 0 53
Combineei qArea ° fiunaH Coefficientp = 0354 q[sstimated ( g ] d] = 1 39 c f s
Time of Cancentration = 500 minutes
°208" pRRINRGE PA'RAMETER$
ImperviQUS "208" Area = 9,787 sq H REAK DISCHARGE, 16 YEAR STORM
'208" 11QIume Prpvidad = 423 23 cu fl. at 6" depth
Starrn 5torage Providad = 5a8 2 cu ft at 8° depth 4 a C' I' A a 1 12 C F S.
Bt➢VVSTRfNG GALCl1LATfONS
#1 42 #3 #A 3k5 #6 #7 NL1MBEfiarsdTYPEoi QRYWELLS'PROPOSE[?
~ Tprre Tirre Intensity f] dev V in V out 5t6rge
Incrmnt, IncrmnY 1 Single-Barre1 .iSpakane County 7ype Af
- (rrun ) tsec ) tin /hr) (cfs) (cu f4 ) (cu ft y (cu. ft.} 6 Dvuhle-8arrel (Spokane Criunty Type B)
i#1'801 WC'93} {¢uti'42] {95-")
i 500 300 00 318 1 12 452 9000 362 Outflow Prodided 3 c i s
~ 5 300 3 48 1 12 452 90 362
10 600 224 079 556 180 376
15 904 1 77 063 627 270 357
_ 20 1204 145 0 51 668 360 308
25 7544 121 4 43 686 450 236 "208" TREAYMENT VC}LUfw1E
30 1800 1 44 0 37 700 540 160
35 2100 091 0 32 709 830 79 RequirQd G P A. pondirtg vp}urree
44 2400 4 82 0 29 726 720 8 Pmperviaus `20$' Area sc 1 t2" = 408 ou R
45 2700 0 74 0.26 733 810 -77 volurre prQvided at 8' deplh = 423 23 cu R
5D 3004 068 0 24 746 900 -154 OKf
55 3300 064 0 23 770 990 -220
60 ssao 061 022 799 1080 -281
65 ssoa 060 021 849 >»o -321
70 4200 058 021 883 1260 -377
75 4500 056 020 912 1350 -43$ STOFtM STCIRAGE ITt]LLJME
80 4800 0 53 0 43 919 144U -521
85 5100 0 52 018 957 1530 -573 Ntaximum starage requlred = 376 cu ft
90 5440 0 50 Cl 1$ 973 1620 -647 voEurne prQvided at 8° depth = 588 2 cu, fk
95 5700 0 49 017 1006 7770 -704 QKt
700 6000 048 017 1[]36 1800 -764
, Sim,psan Engineers, fnr. 909 Alarfh Argonnc Ruad, 5pokane, M1NA 89212 (50) 926r1322
ti371eeIa aa - essn g
E. STC7RMWATER DkA,TNAGE CALCLTLATICJNS: (cantinued)
- Basin IC
Area
Favernent = Pioneer St. = Sta. 15+27 to 20+00 _ $,3{0 sq. ft. - D. 192 acre
Driveways = D driveways at 1,[}00 sq. ft.Ihouse = Q sq. ft. - 0.000 acre
Imperviaus ~ 0+ 8,360 sq. ft. w 0.7 92 acre
Storaee Aeauirect:
a} "248" 5torage Required =(8,360 sq. ft. )(112"-12 in. per ft.) = 348.3 cu. ft.
b) Bowstn'ng = 131 cu. fk. + 1 Single Barrel Drywell, Type A(0.3 cfs aut)
Total Storaee Provided:
Pvnd, 5" deep; (9)(65)(0.5') +(9+66+9+66)(0.375 ft.2) = 353.25 cu. ft. > 348.3
Pvnd, 8" deep; (3){66}(0.67') +(9+G6+3+{6)([}.67 ft.2) _498.5 cu. flk. > 131
GG' 9' 9'
_ 66'
2.00 ft.
i a-
~ 1.5 ft. .
3:1 6" _ 0.5 ft. = 0.67 ft. 3:1
~
(112)(1.5')(0-5') _ 0-375 sq.ft. (112)(2.00')(0.67') = 0.67 sq. ft.
TT STORMWATER C]RAINAGE CALCLFLATIUNS: (cvntinued)
Sasin C
Curb OveninR at Low PQint, 5ta. 15+35, 18' nght, Pianeer St. (Note: CalcuFated lavv pvint is at Sta. 15 + 21
which is svuth of the plat and it is only 0.04 of a faot ltiwer than 5ta. 15 + 35, therefore we are calculating it as
a lvw pvant, also there is a bern across the svuth end af Pioneer so na nanv£Fcan flow tv the svuth,)
h= 8 in. = 0.67 ft. TQtal height vf vpenzng
H 0.104 ft. Depth of water at entrance
Q = 0.55 cfs Trrtal peak rate of flmw
Q = 3.087(L)(H)31x for H/h < 1, 0.10410.67 = 0.16 < 1
L T Q - (3.087)(H)" - 0,55 = (3.as7)(o. 10a)... 5.31 ft.
Ccanstruct Curh Opening; 6 ft. wide, 8 bn. tieep
i
~
I '
DETEPWiT10Pd 8A51N C3E51GN Rh71QNAL F(]RMLlLA HYQROLOG'f 8 8QW5TRING METk#OD
❑RAlNAGE BASIM ANALYS{5 Tor 10 YEAR 57ORM EVENT
oate 405i(ll Project Plame Ridgemont EsSates #4 - 7th Addittvn
Job No 13714 Project Locatian 21st Caurt and RiQneer
Oesigner JYourig [3rdEnage 8asin Name: Basin C
ask Qir P "ecis dramalc 13714 CJrafnage 8asin Descnptian Onsite
Fflename 13774C xls '208° Pondtng ArQa Name "C"
Fmr Ridgemont Esrates Randmg Arsa Lor-ation EasC 5ide of Pioneer
Poinf af CancertraUOn, 5ta 15+66, Rt
SIJBAFtEAS TIME OF CONCENTRATIC1N 4Tcl, minutes
Descnption Acxes C A'C Overland Fiow Channel Flo+ar
ImoBnrfous "208" Areas. SaamenP A 1-2 = 454
Aspha![ Pavemm 1732 ❑ 90 0 773 Ct = ❑ i5 Zi = ❑ 172
DnvewaYs 0000 090 0000 L1 (A) _ 10 Z2 = 36
, Gr2SS Lawn 006 015 0000 M(A) = 0.4 B= 0
S(A) _ 001 n = 0016
O[har Areas Tc (A)= 1 37 5= 4 035
d = 0 1 d4
Spament B.
L1(B)= 4 Tc(eh.) 3,16
N($) = Tc(A+g) 1 37
S(8) = 0 Tc tatal 500
Tc (8) = 00 InYensity 3 18
Ti ofal Basin Area, acr25 = 0 192
Composite Runoii CoeHiwnf = 0 90
Camhinecf (Area ' Runafi Coefficaenf) _ 0173 0 [+sstimaYSd @ d] = 046 c f s
Tirre 04 Corrcentration = 5 00 minutes
°208" ❑RAINAGE PAfL4METER$
fmpervious "2p8" Area = 8,360 sq ft PEA1C DISCHARGE, 10 YEAR STORfN
"208" Voiume Provided = 353 cu ft at B" depth
• 5ivrm 8torage F'rrjvided = 498 cu H at 8" depth A$ C' 4' A n 4 55 C.F.S.
I
Bt3WSTRIfVG C,4LCULATIQN3
_ #1 q2 03 94 #5 #fi #7 PIt1MSER and TYPE of DRYWELLS PROR85E17
i Tirra Time Intensity Q dev V in V rrut Storage
! lncrrrrnt tncrmrrt. 1 Single-Barrel (5pokane CountyType A)
- [min } (sec y (in mr) [cts) (cu ft ) (cu ft ) {cu, ft ) 0 []oub1e-BarreP [Spokans County Type B]
011160) wc-uar (a,u•9z) [U5.46)
5 00 30000 318 a 55 227 3000 131 Out(law Prvuided. 03 c t 5
5 304 318 0 55 227 90 135
10 600 224 039 272 180 92
i 5 900 1 77 031 306 270 36
_ 20 1200 1 45 0 25 326 360 -34
' 25 1500 1 21 021 335 450 -115 '208'TREATihAEhET VOLUNiE
~ 30 18i][} 104 018 342 540 -198
35 2700 0 91 016 346 634 -284 Reqwred G PApond;ng volume'
40 24U0 0 82 014 355 720 -365 Impervaaus °208" Area x 1!2' _ 348 cu fii
45 2700 0 74 013 358 810 -452 volurrv pravided at 6° depfh ~ 353 r_u R
50 3000 0 68 0.12 364 900 -538 OltI
55 3300 064 0 7l 376 990 -614
60 3600 061 4 1 a 390 1Q8U -690
65 3900 060 010 415 1170 -755
70 4200 0 58 010 431 1260 -829
75 4500 056 010 445 1354 -905 STI?RM 5TQRAGE VOLUME
80 4800 0 53 009 449 1440 -991
86 5100 052 009 467 1530 -I063 Nlaxrmum storge required = 731 cu R_
90 5400 050 09 475 1$20 -1145 valurse pranided a18' depth = 498 cu k.
95 5700 049 0 Q8 491 1710 -1219 QICI
100 8000 0 48 0 OS SUfi 1804 -1294
5Fmpson Engineers, Inc. 9491Varth Arganne Road, Spokane, INa 99292 (509) 92&1322
i ~
I 51794C da - 6ami C
IL, STQRMWATER DRAIlVAGE CALCULATIC?NS: (continued)
Basin D
Area
Tota1= 91,064 sq. ft. - 2.095 acre
Pavement = 2Xst Cvurt= Sta. 5+05 to 9+$2 = 10,352.5 sq. ft.
PiQneer St = Sta. 15+27 to 16+78 = 2.7 18 sa. ft.
13,070.5 sq. ft. - 0.3001 acre
Curb and Sidewalk (1 I3' + 31.42'){6.5'} = 939 sq. ft. - 0.0216 acre
Dt-iveways = 6.5 da-iVeways at 1,000 SCi. Fr.IhC1LI5e = 6,500 sq. ft. 0.1492 acre
ROC1f3 =6.5 1'D[]f5 7t 2,000 sq. ft.►mcause = 13,400 sq. ft. - 0.2984 acre
Irnpervious = 13,470.5 +}39 +6,504 + 13,000 = 33,509.5 sq. ft. - 0.7693 acre
Grass Lawns = 91,064 sq. ft. -33,509.5 sq. ft. = 57,554.5 sq. ft. - 1.3213 acre
Stora2e Reauired:
a} <`208" Storage Requlred =(Y3,[370.5 + 93 9)(112"-12 in. per ft.) = 5$4 caa. ft
b} Barvstring = 769 cu. ft. + 1 I]ouble Barrel Drywell, Type B
+ 1Single Barrel Drywell, `x'ype A {1.3 cfs aut}
Storaize Repuired:
Pand, 6" deep; (1080 sq. ft.)(0.5')+(15f')(0375 ft.Z) = 598.5 cu. ft. > 584
Pond, 8" deeg; (1080 sq. ft,)(0.57') +(15fi')(0.G7 ft.') = 828.12 cu. ft> 769
60'
21' Pond 15'
60'
. 2-00 ft.
„
1.5 ft,
3- l 6" = 0.3 ft. O" = 0.67 ft- 3. 1
/ (1/2)(1.5°)(o.s') = 4.375 sq.ft (1/2)(2.04r)(0.67°) = 0.67 sq. ft.
'11. STORMWATER UR4INAGE GALCL]IaATkONS: (cantinued)
Basin I]
Curb C)vening at Low Paint, Sta 15+35, 18' left, Pioneer St. (Note: Calculated low point is at Sta. 15 +21
which is south af ths plat and it is vnly 0.04 af a fomt lawer than Sta, 15 + 35, therfore we are calculating it as a
law point, also there is a berm acrvss south end ❑f Pivneer so nn water can flow to the south.)
h= 8 in. = 0.67 ft. Tota1 height ot`opening
H= 0.20 ft. Depth of water at enCrance
Q _2.22 cfs Total peak rate of t7ovv
- Q= 3.087(L){H}"Z far H!h C1, 0.20I0.67 =(J.30 C 1
L = Q = {3.087}(H)"' _ 2.22 = (3.087){0.20}312 = 8.0 ft.
Construct Cuxb f]peraing; 8ft. wide, 8 in. deep
LTse 2 Spokane County Type-2 Curb Iralets; 2@ 4, ~ 8,
'I
~
i
DETENTfQM BA5lN CIESIGN Rf471C7NAL FORMUEA HYQRC?L6GY $ BQVw'S'iRING METH0D
• DR41NAGE BA51N ANRLY595 far 10 YEAR STORM EVENT
Date 4120/04 ' Pralect Name. Ridgemont Estates #4 - 7th Addilion
.lob No iazia Praject Lacalion 29st CQUrt and gianeer
oesigrer sC Simpscr, f]raEnage Basm Narm, Basin E]
~ ork D'v. P "ects aratricatc 13714 Drainage 8asin l]escnption, Onsite
Filaname 1371404s "208" Pondmg Auea Narrie: "D"
Fa Ridgemont Estates Ponding Ar2a Loca33on. West side of Riorseer
'Avint pf Gortcentratian Sta 15+35
SUBAREAS T[ME OF CONCENTFtPcT10N {Tcl, minutes
C7escription Acres C A"C Clverland Flow Channel Flow
1mpe+vinus-""Areas SdnmenfA' 1.2= 575
Asphale Paverrwt 0300 094 0 270 Ct = 015 Z4 = 0 772
Curb and Sidewaik 0022 4 90 0019 E1 {A} = 100 Z2= 36
❑nwsw2ys ❑ y a9 0 90 0134 N(A) = 0 3 B= 0
Roats 4 238 0 90 0 269 S(A) = 00054 n= 0016
Grass 1 321 015 0 198 Tc (A)= 5 53 5= 00242
d = 0200
O(her Areas 5Qorroerrt B:
L1(B) - 0 Tc {ch ] 313
FE{B} = 6 Tc(A+B) 5 53
S(B) = 0 Tc totaf 8 66
7c [S] _ 04 tnteRSity 2 49
Total Basin Area, acres = 2091
Camppsite Runoff Gae#fcient = 043
Com6ined (Hrea ` Runoff Coeff'iraent) = 0891 [ ] [eslimated @ d] = 212 c f s
Trme of CpncentraYipn = 8.65 mmutas
"208" pRAINAGE PARMr{ETER&
Impervious "208' Area = 14,410 sq fi PEAF[ 1315CHAZGE, 10 YEAR 5TORN4
`208" Volume Prowded = 523 cu ft ai 6" depth
Stvrm 8torage Provided = 859 cu ft at 8" depfh [2 = C' I' Am 2.22 G.F 5
BOWSTRIMG GALCl1LATIONS
#1 #2 #3 44 #5 q6 #7 NUPABER and TYPE [5T QRYWELLS RRpPC}SED
Fime Tsme Intensdy Q dsv V in V olit 5torags
Incrrnnt Incrrnnt 1 Single-Sareel (5pakane County Type A)
{min ] (sec.) (in Ihr) {c15} [cu H.} {cu k } (cu St ~ 1 ❑ouhle-Barrel (Spokane Counry TYpe B]
(u,•sa) iA'C'031 (am•02) (05-e)
866 519 52 249 2 22 1545 67537 870 Outfkm Prvnided• 1 3 e.i s
5 300 3118 283 1138 390 748
70 600 2 24 1 99 1549 780 769
75 900 1 77 1 58 1697 1170 527
20 9204 1 45 1 29 7778 1550 218
25 1500 7 21 108 1807 1950 -143 "208"TRFATMENT VOLUME
30 1800 9 D4 0 93 7831 2340 -509
35 2100 ❑ 81 081 9845 2730 -8$5 Required G R.A. pondmg dQlurre
40 2400 0 92 073 1882 312[] -1238 Impervfou5 '208` Area x 1/2° = 584 r.u ft
45 2700 074 066 1986 3514 -1614 volume prwided at B' depth = 598 5 cu, ft
50 3000 0 68 061 1924 3900 -1976 OK!
55 330[3 064 __4 57 1982 4290 -2308
80 3500 061 (}54 2052 4684 -2528
65 3900 060 053 2178 5070 -2592
70 4200 058 052 2261 5460 -3199
75 4500 056 050 2332 585[] -3518 STORNN ST❑RAGE A10LUME
aa asoa a ss 047 2349 szao -3891
85 5100 0 52 046 2444 6630 -4186 M1Aaximum storags required = 769 cu, fit.
90 5400 050 0 45 24$3 7020 -4537 vnlume prwided at 8" depitt = 828 12 cu R
SS 5700 0 49 6 44 2564 7410 -4846 OK+
100 6(]00 0+18 0 43 2$40 7804 -51 fi0
Simpson Errgineers, 1ns. 349 Afnrfh Argonne Road, Spokane, WA 99392 (srrs) 926-1322
13714d tla- B-LI
i
- IT. RDADWAI' SURFACING DESIGN:
The Spokane Countp A1ier-native Pavernent Design (Tnterim) frrr Local Access Favement Structures was used far
design of the roadway surfacialg.
From the table, Locai Access Pavement Structures, the fnllvwing informatian is needed tv determine the required
surfacing depths.
1) The fype of street must be lQCa1 access.
2} 5ail type (as classified by the Llnited SoU Classifcatian System)
3} The average daily traffic, A,D'I'
Street TvRe: Pioneer Street, and 21st Cvurt are designated as Ivcal access (residential).
- Soil Tv.pe:
In accordance with "Sail 5urvey, 5pokane Caunty, Washingtvn" by Llnited 5tates Department ❑f Agriculture,
Soil Consenration Seraice, 1968, the sofl foaund at the site is categorized as:
GrnF, Gazrison very graveIly laarn, sirr~lar ta Garrisvn gravelly lvam, except that the
surface layer is very graVelly.
Test hoies were dug by Sirnpson Engineers, Inc. at the centerline intersectivn of k'ioneer and 21" Court at the
Station 16+78 for Pi4neer Road. Another test hvle was dug at the center of th.e cul-de-sac of 21" Court ai the
Station S+S(]. The test hales vvere dug to a depth of approxi.mately 12 inches below subgrade. The svil sampFes
vvere tested by Strata GeotechnFea1 Engineering. A sieve analysis was perforned by Straca vn sail samples #I,
and #2. From the testing, [he soil type was fpund to be a Srawrn SRty GraVe1, GM per C3nified Svi.l C1assificatiQn
5ystem. (See sieve analysis results included.)
Averaee llailv 'I'ra~'ic. ADT:
Pianeer Road wi11 have average daily traffic counts of 1ess than 200. 21' Caurt wil.l be cul-de-sac with an
average daily traffic count of less than 200.
' D esiPn:
Fram the tab1e, 2 inches of asphalt concrete pavement over d inches of crushed surfacing
is required for Pianeer Road.
Fram the tabie, 2 inches of asphalt coracrete pavement over 6 inches ❑f crushed surfacing
is planned for 21' Court.
i
II ~
S 1 I"~' a 1 ~
~ Ca`cQTECHNiCAL ENG]NE'cRING d R9ATEFtEALS TiSTING
1520 h! AAame; Fio Bvildmg C Suite 100 SodC2rv=. wA 99216
~ 931-16Ctia 1 Fax 549 841-2012 I e-rnaiE sEraESnkQea com
May ?4, 1999
Client No. SIlI4ENG
1'roject No. 5990026-1
Reference No.: 5LO5201
Iv~r. Ke«.n 1V'IcMu.ikin
Simpson EgOneers, Inc.
N. 909 Arganne Raad
5pokane; WA 49212
Praject: Ridgemmnt Estates No. 4 7`' Add.ition
Date Received: May 12, 1999
Date Tested: May 13,1999
Descrzpti4n; Brown Siity GR.AVEL
L=oca'n'an: 1' Court Cul-De-Sac, Sample #1
SIEVE SIM % PASSING ~ SPEGS ~
3.0" I0o
x ~ 59 I ~
~ 1. a°° ~ 49 I i
~ 3477 ~ 46
~ 239 ~ 38
3/s" ~ 3s
- ~ No. 4 27
~ ~vO. s 20
I No. 16 14
~ No. 30 12
' hTa. 54 11
~
No. 100 10
~
No. 200 k 8.3
j
S lI1GeIE3yy
~TRAT1~, INC.
' • Rick Woodworth
Ti eStlIIg SeI°LrIGeS Ma13iiger
H.TV41 cm
I 96An0 W,45Hi;;uiOh! • ORcGOW • ,'iYq;JINu • tAGNTAf.A •
UTAH . NEVAOA
r
~ 5 i R
GECSTECHHiGAL ENGIHEERING & MA7EAiALS TESTlnrG
~
1620 N tn8mer F{d Burldong C Su'[B 100 SpOicane WA 95216
5175 891 -1 9N 1 Fax $pg 891 -2012 7 e-mail stritsDk0tea com
lylay 2°.4, 1 997
CHeiit No. SDvIENG
PI'CD]eCt No. S990026-1
RefePeIICe Nv.: SI.05201
Mr. Kevan McMufldn
Simpson Emgineers, Inc.
N. 909 Argonne Roa.d.
Spolane; WA 99212
Project: Rid$emont Estates No. 4 "7t'' Addition
Date Received: ~&y 12, 1999
.
I3ate Tested: May 13, 1999
Descripti4n: Srown Siltry GRAVEL with Cabbles
Lvcation: Intersee#ion of Pianeer Raad and 2 15 Caurt, SampIe 92
~ SIEti,E 5IU ~ p/a PASS3NG ~ SPECS ~
~ 5.0" ~ 100
4.05' ~ 86
3.0" ~ 86
1%" ~ 76 R ~
1.0" ~ 62 3!4" ~ 54
~
- 112" 44 ~
3!$" 39 No. 4 ~ 29
~ Na.B ~ ?3 I
Na.lb ~ 20 ~
- No. 30 i9
No. 50 18 ~
No . 100 # 17 ~
~ Nv. 200 ~ 14.9 ~
sinGerelys
~TRATA, INC.
RiCk W~~~~~~
~ Testing 5ervices ltaiager
_ RJW:cTn
IRArlO uVASNINGiOR' •,~;"y~~VF: • N•..'•J+a • Y;}C'NTNNA - VF.,H • N_+IAf}P1
i
I
~OCAL ACCESV i Atl EME1■T S1 RVCTURES
AVERAGE DA[LY 7RAFFIC
SOIL TYPE jOO-600 600+
'
GV'V 211f611 . 21116,p 2PT1601
GP 21=164: 277 2177"
~G~ ~ „ 2'1~11 2'Pf8,p
~
GC 211/7,t 21118:t 31116,1
SW 21116" 277 2111711
S P 2~~~6" 277„ 201~8"
S~Y~ }I 1~ L,~'] P1IfI I 21; f8I I .r r] 1 I r~+1 f
I~ ~ ~F.~
I
; sc PalA2f73Ent ❑E.'Slgn
- 31116" 37$" 411/6'p
i
I -
- CL Pavement Design
OL 477 577
MH Pavement Design
~ OH Pavement Design
PT Pavement aesign
I -
l 1) Saif type is c3assifed by+ the Unifed Soil Cdassificafion System.
2} Requered thicisness is given as inches af asphalt concrete pavement over
, inches of crushed surfacing.
SPOKANE CQU[11TY ALTERNATE PAVENtENfi DESIGN
(INTERfM)
.
- ~ _
•3 S` .s`. a1"• ' - ~ ' _ _ _ - _ _ - _ _ _ _ -l~ VJ ~
,~p . . Y r .,}r r ~y ya ~ •Y~WiiM1i.K~t~ICiM.4t~ Yr.'.i~' . . . , ~ ~ ' +
~tfi ~ ~ 'w~ry,l~t~1,`? ~N•n; , . i , ~IS ` • t
y 1~~ { • .
(JOifts thQ01 75)
k~} y~. "~~r !I va+~'~'Yq r„~''~+"i_P~ ~f ' , ~ • ' ~i° : ~ > tl
4 iF ~i¢~~ ~ '(~''~~'i~~%~ ` R ~v"~ ~ • . ti 'TS ~ "Wy+1 'v
. 'l t~ 'µ,'aG~ rY rd P'. . M~ VR ' ' r9, ~ . ' . Yi ,i{ ' ~1`e 4 y
~ Q r ry~`+~"' ~i ~S ~ 1t...'i~~ . ~ ~ y~ . ` ~ ~ " ~ r~' •
' g:^•~ ~ . ~~'~t 1:;r. . ; ,'Yl.i ti: ~ ~ • , ;nw. ~ ~ N ' ~ • ( t. .h4.qJ M' i ~ ' L L y- ~ 'I
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~ 7r ♦ ~ f'~1•~ ~ t: ~ ~ j~ • i t-~....+ - . „ '~i yi+.!~r `~Y: ~.,t_ :_,ew~f
. • V Y~ • b~~z'.5~.`~p ~ v=~ - = Ilti ~t944 - i ` ':i rr'~, Cf•'
.~~rb~. ~ 't r~' L . ,~,,,~j " . It r ~ ~lM~r " . ^ ~f~;}• '
A 6~ _ ^ f~ . , w~ ~~o ~.C~ ' ?l~.;I IL~,.rl. '"d:• ~ r. , , s-~++v.
A• , . ~h • ~ II~" y.; ~w1+w '1 ..'~>+a .~'~,_x.i,eyF•• ~ ~
- ~N ~ - ~ ' ~ ' i~+. ^pe~lv~(ww~e~ R r • II~~'., ~ . ~ ~ '7 E, ~ . : .
. ~ ~ . 'a • ; ~!c~.• ~_Q , ~ R' 11~1 r . ~v..,~.~.~: ~ , ; ~ ;y h~~r`R,~i
Y T j~„w~'. 2 II i yL" 1.aoi ~ a.:~, ~ ( ~
~4 ..j • ` f;`3. F;~, • ,~y~,.f i`lr ~ • - . ~ 11 ~ . ' ~+2.•iy~:- ~3 v s'~, N ~F 'dp O
o , ' -s , r F. M~? ~~'~,p K . ' 1 ~ ~ t . , ' c~ 5'
N' ~ e i. ,te_~~ A f r « ,a y. ~r==~==,__- 4~ _ ` ~ N - i . ,i,~•'~e• tt ' ~ =~:r _ ~ ~ H
N 's ' = ti ~~R ~ J ~'t ~ ' ~ , - ~ 0)
. , {~~p.`(r~-, y~ ' II~, 3 ~ a ~ il9 .:a
~ .r. 3 y r • ~t ~ ~ ' • ~ y* • ~ I fii.I~i•'~/1
1~~ 'lM1\~.' T ~ • a
~ t' IiYS% ,`fi r ~ ` I ~ . , + ~M-~ . • j y ,t1c.W ~ ~ ~a,~ ~ ~ . V
C° , ,~~^r~:~F~ ~ •!Y' f~ X``- I . • . . . ~ a ~ . II ~ r~ . '~i ~ ~ 1~
U r' :1S i ~'S , 1 11 h • ii ~L~~ ~r
..~NW 1~f~' • r.~ ' ~
` ,1` . r;y~>3 - ' L•~~ , i ~`r'1° ~ ~m~ F~~', Y ~I • ~~'7,..I ~ ~ .j - ~
I,~ ~ •
, ~ a~,~~ r•+' w -r: ~ ~'1r 1 . $oti~~~.~~I~.~'~:` 'S~~,i k. -,r...-'4 t1 rd:~ti
~ , WY " tD _ t ' ,F~r~".' r i ~itd.,; ~ ..•.v~w-a{ji~~ i
F ~ , ='"!i' `k' -G~- '5~.• " I ~'1 . ~s/ sy:• Y..'i::;' Y
~ } Tt
dd • ~ ,r~ " ; ~l~.f/~ •r~"~ L~ ~ p~`~ , wrve wiW1~a~ ~ ~''f~ 7~Y ` ^ ~
A.~1
• J' ~ ~,T Qih~\ ~IYw ~r ~dp ~ N ~ ~ ~ ~ ~ } t 4'w'~r , ~
, 1~/ e.} r~~,~ . ~ ~ k ~t7 ,S`~,: nw.!~i ni# J!Y \,~iy~'j.a. .+15• ~.,1~ 1!1 ~
N x' y } •e~AFk~ 0 . . t~ '~i~l~L ' , c
~ `~S y~ a, _•iat•. D~~~R ,~ts' , ~ WO r S.._.. y ~ .
i ~ ,w~~~,~ ~r.~4`- ~7 _ vt¢~~~r ~ r ty'' ~ ~ ;S ;i~` ••aD~Jc,:~~`s+ P`~ ~11,.K. _ ~~,+'~iti.. -
~ • ~ p ' y :r ~r~~r ifi1S~ I! , ✓ 'i';mt{', a` ~1",:. ,Y.i.;•'~$• , p'fIl,~.,r~~}~`';, I ~ ,••yc~]~~'• : S~
, ~~~,r~q„k~~ M ~ ~ P~ .~r', 0 r• ' 1 ~ ~ ~ : # ~~3.: •u ~i}",~f~~`i~.I~I~'~'~ ~ ~~~'•k'~` e~. i"`T'1 • ~11`
. T. 24 N. I T. 25 N. ~3 •,a
~ Joins sheet 77)
~ .
i ~
,i
1 Mde 0 5000 Feet
~i • i Scale 1. 20 000 i
i1' _c` ' •
i . .1 ~ ` ~ ' ,
, .
nrr~• . ~c~.., , ' ~ ~
- * 00nNs. fownshrp. ~nd acclwn curnois shown on Ihls raap a,c mdelin,lc
7F
~ ' ' '9, # i - • •
! 4
i 5.
. ~ .
. i _ _ - , • ,
. ~ -
~ 3tao Soil nsme
~ symbo[ , 4 Axa7sbte , ~ .
Water P=etfoa Dlspetaitia Shriak-sweli
caPacicr 1(1:3 dludon) poceaw!
~ • ~
DsC Dragoon stony silt loam, 0 to 30 percenc Simiiar t •
slopes. slopes, ;W dwd ~tt
OsD Dragoon siony silt loam, 30 to 55 pcr- _
cenc siopes.
Ov0 Dragoon very rocb-r comolex, =0 to 55 Dragooa -
percenc slooes. 30 pen . ,
rock r: - j
crop in - ~
£k8 Eloika silt lonm, 0 co 20 percent slopes. _liedium-
canic s ~
~ olac,at 0. l; W 0. 30 8. 1 to Q S High------- LoW to mod.
- , avel i , . _ Q 12 to 0. li d. 1 to d B HtSh..._____ Lon~~, te~
undula .
~ 0 0. OG to Q 09 ~ 8, 1 w:. 3 Hiqh.-__._ Lna'.
EtC Eloibn rerp staic sut loum, 0 to 30 pcr- Similar {c _ Q 04 to a U8 ~ 6. 6 to 7. 3 l3irth_______ I,ow,
cenc stupes. e<cept ' ! ; II
EID Icloiba verv sconc sut lonm, 30 to 55 ~ • ~ ~
~ perceuc slopes.
I i
' E:n Emdent silt losm. I[eciium-i
eoaikuas~3 nlinf f U. 1~ to 0- '0 S to 9. 0 HI;h...---- I,oyr to mod- I
co Nace 0. 17 to 0.^0 i w 8. ; aJatenu Lon cr
~o ubou . ~
' Fa3 Freeman silt loam, 3 to 30 oerccnt Verp deerli 0. 1' t° (L 20 e. 6 t° 7. 3 Lo°'....... . N(udcrnte.
~ slopes. nich mc .0. 2- toQ'0 G. 8 w ' .
Fa83 Freeman sdt loam, a to 20 percent nm or ~ 3 aiodenie___ T.o~r to raod.
slones; severel~ eroded. from sil,~ Q 17 Q 8 to'. 3 Lo~........ \faicrsce.
FaC3 Freeman 3ilt losm. 20 to 30 pereenc
~ • slope.s, severelp eroded. ! t
Fm Fresh wuter marsh. SLailow,
, iring°s .
• ivacer *
,.r a, land i ,•t _ . . . , . .
I - - . .
GaC3 Garneld silt~ cls~• loam. 0 to 30 pcrcent Cerr deeF j~ . ,
~ slopes, severeiy eroded. on ridge" ,.'d:li to 0. 16 a d to :.3 Loa....... 3lodetsta
• upinncls E14 to Q 17 E. 6 to S~ Loa.... High
i~ GsA Gnrrison grsvelly loam, 0 to 5 pr,rceni Grarelly, 0' li w Q_0 6. 6 to F, $ Lau__..--. liodcrace.
slopes. sively d;t -Q 12 to Q li Q~ 8 to 3 lfodetate
~ Gg8 Garrison grsvellv ioam, 3 to 30 perccat outnasbi ;p. ~ to 4 10 4 6 to 7. SIIodenc~_ I,orr,
slopes. igncous ,0, Q.! to 0. 08 6. 6 W i. 3 Hlth--- - Losr.
erately n
s.^_ad,
2! ' to b
i Gm6 Gurrison vc:y grvclly to:►m, 0 to S BimiLgr to{~•'~ - percent slones. tiie si~rf:,, Qai to q, 10 s dI b 8 110cfersu-_ Low.
,
~ (X (13 to (L 10 8 to S ltodcrate_ I,ow.
; ~,.`-`a 04 to 0. 08 ~ 6, 8 to 3
~ Gn8 Garrison very ston}• ioam, 0 to 20. Simila: to
Percent slopes. the 5uriy.. i' . _ -
~ I GoA Clenrose silt loam, Q cc 3 perceni ;lopes. Cer}- dee); ,
Goo GlenrosesIItlaam,;,to20~+erccntsiopes. iormedf-p,`Ijtp"Q,}^~ ito 7.3 3fodcrat,e__ I,on,to
~ GpC Glenrose siit luam. _0 to 30 perceiit iuyer in8
slopes. ;r.utiy rS . ` ; . . , - r IIsodecate.
i GoD Clenrwe siit losm, 30 to 55 prrccuc ~ ~°4'~' i •
- slooe~.
• -
- -~c'~ - ' - - - - - " • '
. ` - • ~
' S~~R~ ~ _ _e+ • r
T ~ • t._.'. ` ' .
„y _..~.$.~IE~! . . . , .e. < <
Try a depth or 1.2` 4-4.I Dr7weTls -Precast C4RCrete dry-
wel? s, as shown oa Counr-y standard
2/3 112 dra~-i~ags, may be used to retain sco~
~ V=i.~8fi R S R= Ar~a drainage in sails with 3 Very rapid peeP-
` a Wettesi pe*imet er meani? i ty, l'ypes A and B Dr ~
~~.Is ,n
tne fQTZo~~.ng sc~ils may ~Se designed to
2'~. ~'f(?~3..Z..~c3.2~ a 5.28 s.~. infi? trate a rate af f3ov ag 0.3 c*s and
? +2(I.22+2.42) 7,36 fr. 1.0 Cts respectively:
~ Bong HarbZe
P, . .717 $canaer Phaebe
Gar:ison~ 5Drzagdale
21 3 1r z . gan
V=]..486 (.7I7) (.02) = 5.61 fps The Zocatians af these soil eypes are
. U3 showa in the Sail Cnnse*-,+ation Service
5ail 5rsz~ep far Spc~icaue County. The
4~ ~~T~ ~ 5.61 f~s x S.?8 sf ~ 29.5 cfs dra.i.nage repart shali iAClude a copp oz
the 54S map with the subdivisitin plotted
+ 30 cfs . d- 1.2' 'chet-eoa. Tfr.e Gounty Emginesr shall reT
Sol,ve Dc: Try 1.3' quire the deve7L}flEr ta provide a sieve
ana.lgsis and sail type test from a soi_s
laaQratory acceptable to the Couat7 Ea-
, ~ a I}c}3 3/2 gineer if Cl~ere is a quest~,esn regarding
~ b + Z"- ~ the ai~ove sc~il types.
312 In ruraZ areas, as defzned ia Spnicane
~ Q -,132. Z (212xl. 3)3 X 1.3 30.9 clfs Cauury Road Standards, anen grave3 ary-
(2-r2X2.U.3) welIs may be per-aittea iia lieu v-f the
30,9 cf s - 30 cFS . dc m 1. 3' precast cflncrete drqrae?Is.
D 7 D, f3aw is ssspercritica~.. P'ecast cnacrete dry~ae? ~.s prc~poser~ £or
~ e a use in otlaer soii sthan thaee shnwn
Sinca the f].aw is supercritical, care abave and al3 apen gravel dsywe?1s shall
be designsd accarding t❑ percnlatian
, shou3ci be taken ta pravide a proper de- sates determined tay a fie?d test ccn-
sign at paiats esnere harizoatal analor forming to the Manual of 5epcic tank
ve-tical a].ignmenc change. practice. A County iaspec~or s'~al1 he
frae txaard of .30d ~hou~~ ~ a~g3ie~ prese~.t dur~,ng a11 percc~latiax~ teses. A
percolatiora tesz r_alcuIation sheez
e D_. 30 X 1.2 - 3.55' signed and sealed by a registered civil
eugiaeer shall be submitted. The per-
I - V~ S. 5 f~s r~a~ims~ a? Iflwa~Ie. co].ation rate shall '~e e+qual to or
gxeaeer than 72 inches per haur tn be
accepCable £or dr7we17, const¢uction.
' Prvvirie rip gap. (Befer to 5ection
~ 4. 5. ) 4-4. 2 SCarage Fac{ ].ities 9 Ilecenr±an F
4-4 t3ecencivnIRere:ztioa 5pstems - T'he starage fac{1.ities may he rased to _
reg-uI.
peak rate of run~xf frnm 3Ti eX~.SCj.IIg ate fl.aw rae~s_ An ove=~law
shall rsot be in~reasec~ due ~n the t~e starage syste= ~iic?~ seg►~aces the
sit
rate of propvsed~ de~r~a~ent f+~r a gi~+en design autflow s~~, be us~d. 5~e
stor~m. Therefare, a retentiorafr~etea- ~'igures 4-3, 4--~+, 4~5, a~~. 4-f ~or
tion faci3.~.ty c:i-sice seriI~. be required. s~b~est~d deta.i3s. Lan~scape~, facil°
Y f ties such as parks, pZay=ields, tennis
Date: 414I$4 torarrs, etc. are reeoamercded for
~
, 4_rs
~
. •
I
i'
a P C7~ I< A., 1-~ E U CT i-i T Y
r
DIYISIQN OF ENGIlNEERING AND RpAI35 A DIVISICYN OF THE PUBLIC Wf]AKS I]EPAR"nv[EN't
,une 6, 2001
Chuck Simpson, P.E.
Simpson Engineers ,
909 Nsarth Argonne Road
Spakane, WA 99206
S[.TBJECT: P1423F - RidgernQUt #4, 7=h Addition
5abmi#tal Acceptance
Gentlemen:
f We have conducteci a general evaluation of ycsur recent submittal fns this praject, and we find that tlzis
submittai appem to meeE the minitnum standards of the Spokane County Stcrndards for Road and Sewer
Canstructian {"SCRS"}. `Ne are, therefone, ab9e to accept ymur approval af the plans and calculations for this
project.
In accardaiace with 5ectinn 5.02.T} of the SCRS, this plan acceptance is valid until3une 6,2003. Tffi.he
facilities aee no# constnsciad by then, yau may requesE an exten.sion of the acceptance fvr an additiona3 two
years; hvweder, the plaris may need to be revised to reflect current sta.nciards priar ta granting the extertsion.
Piease nate:
1. "I'he County's acceptance Qf this submitcal does not relieve the sponsor or his agen#s
from aryy lFability relafiedl ter portions of the design that are nvt in canfvrmance with the SCRS, or
which do not follow good engiaaeering prac#ice;
2. All permits and nvtificatiors necessary priar to con.structiQn are the responsibility of the
project 5porsQr and]or his assigned agents; and
3. 'Y'he 5ponsar's Engineer is required to conduct inspeition and testing work and subinit
Record X?rawings and in.spectinn reports in accordance with the 5CR5.
We are enclosing a stamped set of prints far fihis prrsject. Please cali F.d Parry, P.E. (477-3600) iF you wauld
like tQ haVe a stamped set of repraducible plans andlor a stamped set of calculatians. Bonding infarmatian
and plat ded'scation language will follow eander separ°ate c.civer.
5inr,erely:
Ross E. Ketley, P.E.
Spokane Caunry Engineer '
Ed , P.E.
Plan Reviaw Enganeer
cc: Prvject 5pDnsbr: Ken Tupper, 12429 East Sprague, 5pokane~ WA 99216
Plat Ffle
AeViewer
1026 W. Hmadway Ave, + 5pokane, WA 99260-0170 •(5U9) 477-3500 FNC (509) 477-7655 (2nd Floor) 477-7478 (3rd Flaor) • TOD: (509) 477-7133
~
Submittal Checldist
far Ro ad & D rai.nage Projecis in Spo ~an e Coun~ - PI~.tslSh art ~'Ia ts
iTlaas 5ubrntttal Checkdtst is tp be completed and sigriea by the Spans'or's En~,~tneer, and incPuded wrth eoch ptctn
submrtta2 inta the SDaknne COFdPYV ETig[f'P@ET'S Office If fhis farm is not fully comptered and sr,;ned, da not
subtnrf pZans and ealczcIations to .Spokane Counry far revaew and acceptrrnce tncamp2ete submrttals wr2l be
retumed and wrll cause unnecessary deIoys jor your cltent.
P roject Name: e. s N c . 4 Ad d ; A• ~
Spokane County Praject Na. I7ate: 4/Z4`h° oi
ProjectEngineer: --~►y'~p~c~ ~~~~~~_~vs ~~ac. Phorre ° i~ 1?6- - 132_-z
Praject 5porsor: Phone: i ) `i' V
1"1 +335
A. Prelimiu2ry Prvicess
Prior to SubrrsittaI of Road and Draie Pla3:ss, ibe fvIlowing events are t.o have alneady occurred:
(By checkirrg each rtem ofshown lae2ow, you are stating that you have veried these eventslitents hrave been campleted )
Adoption of a Heari~~ Examiner's R.eport for this 3ong plat or aPPan.uing
g_Report far tb-is short iolai, p
1
')'C At least one Pre-Uesalgn Mmting ha.s b= held with County+ staff at the Engineers Office. k
~ An ".Agreement ta Pay Fees" has been signed hy the proiect sp4nsor, and submitted tA the Cou.ntv
Bugineers Office. '
~ A Cb.annelizatian Plan (e.g. signing and strigin~ pl~) o~'public roadway i~nprovements, has been
caardinated and discussed with the Gcauutv EnaaBeers dfi6ce.
B. Road and Drainage Plan 5uhmittal ~
T'xe items Listed ioelow are to be provided as a rrtinimurn with a raad and drainage plan su6mitta}. AdditiQna)
information may be required fi.o demans[rate that the plans rneet aIl applicable standards.
IBY cheeking `yss" far each ftem shoavn below, yau are verf, yang theat thesa iSems hawe beerr cvmpdeted ard are rncluded
in this submittQ! For nny bax c1recI:ed "rtla"; ¢ writterr jrssfrcatian of any vmis,sions at !he end of thts sec!ion rs
required.J
xtem Ilescriptaaa
yes Roa.d a.ad drainage plaas, twa prnt sets. {Certifzca#ion statement on cover of plans}
-L. 0 ves V nla One set of pIans an 24" x 36" myiar merisa, or CAD electron.ic file -.UWG or.DXF gQrmat
~ yes Each Plan Sheet af recnrd is signed and daited by the project sponsor. .
Yes The road and draina.ge de,ign meets the requirements af Staie law, WAC 196-27 re~a,r~g
"confbrmity witii a.ccepted staz3dards"; that is, tbe design re£leets The `'Mte af the practice"
for tae prapased coacept
• r~ Yes 1be plaas, Drairmge Repart, basin map(s), and any other calculations are stamped, siped
and dated by an engmeer iicensed in ttae State ofWaShin,toa.
)Q yes ❑ n1a. Dra=.,c,,s Aep4rt, two sets. Tv include• basin rnap(s), time of concentratioA routes In basin
rc:ap, and CertificatiQn statement on cover of repvrt and basin map-
'7. X yes G nia Geatechnical Report, ane set. (Tnclude ail soiE test pitlborirzg ]ogs )
`R }'es ❑ nla 5tructlaraJ Faverrsent Calculatiarrs, mne set
❑ ves ~ nla Cross-sIope grade ealcu4ations - for road rAder~r►g Qrojects.
Item Aescriptian -
yes 0 nla Maintenance Mariual and SiukZng Fund calcuiations ior dranage facilities locaged outside of
CouritV road riaht-cf-wa}°. DeC.l Lir qi ti~~ C'f Ce de-Kct c%`V
11-yes ❑ nla Wntten explaaataan af wholwha.t entt}, v,n1l he respansible for rnaintaining dra'se facLhries
~vhLich are Iocated ouLside of pubLic road right-nf-wa}+, aad thLat the plau is acceptable ta the
Caunty En-cpnesrs Off'ice. wA -:cfreQs- p 1,c+.
1.7 , yes 0 ala Chaainelization Plas, or sicgn~? and sinping information provaded sn the road plans. To be
incIuded in roa.d a.nd dramage pian set.
13. K Yes ❑ nfa I have read the Heasing Exaztuner's Repart Oang plat), nr Plarni.ng Dept. Findings arad
Candiiiaas (shart pIat), for tiis project Zle design meets fihe r.omditioais in the report •
yes 11 n,la Cop~ af Approved Design Deviatians
;5. Q yes ~nla Fire DistTict Appraval, fcrr private roa.d.s
Yes 0 n!a Lot Plans. Required £ar auy lots with drainage easements and which front a pubhc roa.,~ or
rar lcts -whi4h receive and nreat a-umaf¢' irom a public nakt-nf wau.
n 0 yes ~ nia Any appTicable State aud FederaI pernifts have been Qbtained. (i.e. IUA, 7ARPt", etc For
Permits witts r.anditious, a copy of the pernzit and canditions are mcluded iu the plan
submituil.
;V yes D nla Inspecrian Agreement 6etween the spoarsor and its eagineer.
rqr 0 yes nla For off site easements La be granted ts Spokane Covnty, the following iterm shaE be
included: Iept description, exIaibit, and proof of awnerstup
r~yes 0 n/a Erosion Gontrat Plau, required far "Majar Land-Disrturbn Activity." To be i.ncluded in the
road and dra3Ilage plaa set. Se~ rv►Dl~.s c~vL e~~-~i~.~~ ~ Q~~n .
" E,i-planation far any items listed above which are nat incfuded in this submittal:
(Nate. ari uisuff caent justificarian of why an imm was not included in the submitted, or incamplete docamen[s, may result
in the subfcuttral beino xenuned svit'~aut revicv or vv~thvut a~ptans~ Pmvide ai~.chments if necessary,)
Y
By signing balow, the enganeer is stating that the infomcatian prcrvided in the suhrnittal as camplete, that the
information prflvided mthe Submrttal Checletzsr is accuraie, and the plans and calculations are iu accorciance with
the Spokane County Strrnduurds far Road & Sewer Corrstruction, and the Guidelines for Srorrnwuter
}Uffanagement, except where aua approved T)esi,n I7eviatE4B a.llows athenvise.
En!2~neer's Signature: Date: 4°12-4-/cli
r~
En~neer'
sName:
, (please print)
L{ rhere are any questions aboart this form or apprapnale procedures, ptease ccrI2 2Jevelopment ,5ervrces,
.Spokrane Caunty Publac Works, ad (509) 456-3600,
For Spokane Cauniy Use C3nly - - - -
5ubmittal Nn- 3 County Flary Reviewer:
r
~ Accepted in far ~ CDnstructioa
Q Returned tc) ttre enguzeer wi~raut rev v andlpr acceptance, See attached letter of e~:planatiarz
~ ~t iv r s~~J~tar -
~
Frocessing Date a4ml~w (AW6r
Sut7II3ittal CheLuSL • 7
Y
Spok2_ae County Publie `d+lorks; Apn1 29, 1999
Subittitta1 CheCkliSt
fvr Raad &]3rainage Prvjects in Spokane County - PtatslShorf plats
Project. Ridv,,emont Estates No. 4- 7th Addifii.n.n.
Prvject Engineer: 5i.mosan Envineers. Inc_
Project Spansor: Ken Tutaer
B. Road and I}rainage Plan Submittal
Explanatian for items which are not included in this subrtuttal (bcax checked "nla"):
Item 2 Dne set of plans on 24"x3 6" myla.r me.dia wili be subnlitted ance the plaris have been appraved by
5pokane County Eagineers.
Item 9 The plat dves nvt ftont an existing Cvunty road. Therefore, na street wideni.ng is required or cross-
5li}pe gFade CalCulat1QT15.
Ttem 15. Ng private raads are glanned fvr this plat.
Item 17. Nca State ar Federa.l permits are re,quired.
Item 19. No aff=site easements wi111 be granted ta SpaRane County.
i
~~~~WIE~
~
BEFaRIE AUB 2 $ 2003
CITY +[]F SFDKANE VALL
- pEPARTNIENT OF CUIYMUI~ITY DE D WORK~)?
IN THE MATTER OF AN EXTEN~ION ~
[)F TME REQUE5T F[?R pE-1423-82, ) FTNDINGS C]F FACT, -
RIDGE1Vi(]NT ESTATES #4, Arii ) CONCLiTSI4NS ANT]
APFROVED PRELiMINARY P1LAT ) DECISION
'I'HIS 1VATTER, a request far an extensian of time from f'rrace Iiarvest Fellawship ha.s
been received and decided upon, pursuant tfl Spokane Va1ley Suhdawisivn regulatians
(Sectian 12.100.118) and RCW 58.17.140.
, FINDlNGS OF FACT
1. The individual signing below has properly deiegated the responsibility for rendering
this decision hy the Directar of t,he Spokane Valley Departrnent of Community
Developrrxzent.
2. The orig-inal develapment propcasal was ta subdivide appraximately 125 acres inta
2841vts far single famiZy residences. C3riginally, R,idgemvnt Estates 4th Addition
encompassed all af vvhat is nvw Radgernvnt Estates North. Spakane CQUnty
requested the plat be splat intv FLadgemant Estates e Additian and Ridgemvnt
Estates Narth to avoid confusion ~ver the multiple phaESes of the original 2$4 lot
development. Tlae oraginal grvposal alsv incYuded a zane reclassificataora from
Agricultural (A) to Single Family Residential (R-1) undea- the now expired Spokane
Caunty Zaning Qrdinance.
3. The subject prelirninaryy plat vuas apprcrved by the Baartl af County Carnmissioners an
]uly Z?, 1982.
- 4. The propasal is generally lacated adjacent to 1 f'h Avenue, Sullivan Raad and 24th
'Avenue in Sec#ion 25, Tvwnship 25 N., Range 44 E.W.M., Spokane Valiey=
Washington.
5. The existing zvmng of the prvperty descriihed in the applxcation is Urban Residential-
3.5 (UR-3.5), established on .Tanuary 1, 1991, consistent with the Prvgrann to
Impleriaent the Spokane Cvunty Zoning Cade, and remains in place as resu1t af the
adoption of the Spokane CQUnty Phase i Aevelapment Regulations by the Spokane
Valley City Cvuxtcil an March 25, 2003, C]rdinance ##53.
+fi. The Gcrmprehensive Plsn originally designated the area of this preliniinary plat as
r '
L3rban (U). The new Cornprehensxve Plan designatian far the sulaject site is Low
Density Residential (LDR) as a result of the adaption of the Phase I DeveYopment
Regulations to Implement the Gvmprehezasxve Plan by the 5pnkane Valley City
G4uncil vn 1Vlarch 25, 2003, 4rdinance #53.
7. Spokane Va.l.lley has established specific criteria fnr considering the extensicrn ❑f time
far the expiration of pzeliminary subdivisians, specifically for xegular subdivisxons,
and department palicy for shart subdivisions. These crateria are found in SeGtivn
12 100.11$ (Extensivns of Time) of the Spakane Valley Subdivision Qrdinance and
have been used as a basis for this deeision. •
SeCtiC?TA 12.100.118 StaCeS tYiat "The Dixectax may admrnistratively approve an
extensivn prcrvided th.ere are na sigruficaut changed conditians whzch wrauld render filing of the plat or binding site plan contrary tv fihe puh1ic health, safety or general
welfare, and further prQVf dei one or mare of the following circrarnstances is found tQ
apply s>
1) T'hat someporlion vfthe exxisting preliminary plat hus beenfinalized .since the lASt
exte,n.sion was granted and the remafnang 2ats would form a unifietl developmenx
corrsistent wath the original rapprovul;
FLESPdNSE: Eight {S} phases of the prelaminary plat hawe been finalized to date
and recarded wifih the Spflkane A,uditnr. The reTnaining lots will fcrrm a unified
develerpment consistent with the original approval.
2} That the predimaraary suhdivision, shot~t sulydivi,siora, or birtding site plara remains
generally, cartsi.rtent with the ortgircal plat ar binding site plara that was approved,
and the sporzsor has taken substantial steps taward fBnalizing the plat or baradang
site plan, whach shall inc2ude one, but is not timated ta thefollowing;
a. surveying the lots withan the development;
b. arranging for public .ser-vices to the site;
c. obtaaining necessraryfinancang far ctdl rr a partaon of the predamiraary
subdivi.rion, short subdivisaon, or binding siteplan;
rl. the completion af studies ar other reguirements which were part of the
prelimintary subdivisiQn, shorx subdivisiQn, or handing siteplan approval.
RESPC]1'+1SE: Tfze preliminary subdivision remains cansistent with the oziginal pla.t
that was approved. In additican, the applicant has finalizec3 119 of the vriginally
appraved lots, with 12 lnts rernaining. Those 119 lots have been surveyeti and
connected to puhlic sewer.
3) That at the tirne the prelamirzary plat apprr val was granted, develapment of the
proposad was conditdoned upon the extension cafpublic servaces which are nat yet
available. This provisian shall not apply to publac utility exterri.rrian which the
project spansor would narmallyj'und.
Extension of Time Findings Fi1e Na. PE-1423-82 Page 2
RESPC3NSE: Not appiicable
4) That admiraistf-ative delays have caused tlae xnability of the applfcarzt ta fanataze
the plat withan 1he f ve (S) year tirne period. •
RESP'C3NSE: Not applicahie.
8. This is the twel#th request fax a time extension. The total life of the preliminary plat
has been appraximately twenty one (21) years.
9. The proposal has been circulated to all affected agencies and departrnents far
cvmment. Additional andlar rerrised cvnditions of approval have been
recomrriended by the Spakane Valley lJivisicsn of Public Woarka. These
recommended conditions of approva1 are ancluded belvw.
BASLD UFCIAT A REVTEW of (a) the crzteria for appraving an extension of time of the
expiration date for a prelirninary p1at and {b} the above Findings of Fact, the fo1lowing
conclusion is Anade:
The prvponent has demQnsfirated pragress toward campleting the preliminary glat as
evidenced an the above Findings of Fact and there are no significant chazaged canditions whach would render filing of the plat contrary to the public heaYtla, safety
or general welfare. TherefQre, a ane (1) year extensian of Ei.me is warranted.
DECISxQN
BASED UPC]N THE ABOVE Findings of Fact and Canclusians, an extensian of hme
request for applicatian PE-1423 -8Z, Ridgeanont Estates #4, as herel~~ APPROVEY) until
August l, 2004. '
CCINDF'TIONS OF AFP'ROV'AL
SPOKANE VALLEY DEPARTl'VEN~ OF C[71iAIIUNIT4' DEVELOPMENT
1. TY~ie prelirninary pPat rs given conditamnal appraVal for one (1) year, specifically ta
August 1, 2004. The applicant rr►ay request an extensivn of time by submitting a
written req,uest na later than tliirty (30) days privr tca the above expiratimn date.
2. The propasal shall comp1y with the Urban Residenfiia7-3.5 (LTR-3.5) zone, as
amended.
3. The final p1at sha11 be designed substaratially in carnformance with the preliminary
plat of record. No increase of density or number of 1Qts shall accur withvut a change ,
o#` condihan application subrnittal and approval.
Extension ofTi3ne Findings Fi1e Na. PE-1423-82 Page 3
~
4. A final plat namelnumber shO be indicated before the fmal plat is filed, s-uch
narieln►unber to be approved by the Department of Comrnunity DevelQpment
Dixectorfdesignee. _
5. Apprapriate xoad naime(s) slaall be indicated.
fi. The I]epartnnenx of Comrnunifiy Development Directorldesignee shall review any
propased fina.l piat ta ensure compliaince w ifih these Findi,ngs and Cunditians of
approva1. .
7. Apprapriate utility easements shO be indicated vn copies of the proposed fnal p1at.
Written appraVal of utrYity easements by appropriate utility companies sk►all be
received with the submittal of the fina1 plat.
8. The final plat map shall iradicate by a clear, dasheci line the reqiured yard setbacks
frorn a11 pnvate, "Tract X" or p-ublic raads. The dedication sha11 cantain the
following statement: -
"Si+3e yard and rear yard setbacks shall be detertnined at the time buildin~ pem-lits
are requested unless these setbacks are specifically drafted on this fina1 gPat"
9. Three (3) current certificates of title shall be furazished to fi.he Cammeaxity
Developmenf Di-rector prior to filing the fina1 plat.
10. Prior to filing a11 or a poxtian of afinal plat, the appIica.nt's suz-veyar sha11 subrnit
one or more maps vutlined 'an red of the area being finalized. The scale shall maxch
the appropriate assessor's xraap scale.
11. Asurvey is required prior tv the filmg of afinal plat.
12. The final plat sha indicate yard setbacks arc lengths an eul-de-sac tQts which meet
ar exceed the minimum frontage of the underYying zone of the fina1 plafi.
SPQKA.NE VALLE~.' DEPARTMENT 0F PT7BLIC WURKS
I . Cvnditional appraual of the plat is given by the City Engineer, subject to dedicativn
of right-of-way and approval of t.he rvad system as xntiicated in tJae preliminary plat
of recDrd.
2. +Const.niction within the propased public streets and easements sha11 be per£nrmed
under the direet supervisivn of a Zicensed engineerIsurveyor, dvho shall furnish the
City Engineer with "as-buiZt" plans and a certxficate in writing that a11 irripravenents
were instailed to the lines and grades shawn on the apprvved ccrnsh-uction plans and
that all disturbed manuments have heen replaced.
Extezasion ofTime Findings File No. PE-1423-82 Page 4
3. Na canstruetion wark as to be per€armed vvithin fi.he existing or proposed public right-
of-way until a penmit has been issued by tlie City Engineer. All wvrk is subject to
rnspeGtion and approval by the City Engineer.
4. AlI consfx-uctian within the existing ar propcased pubhc right-of vvay as to be
cvmpleted prior to filing each final p1at, or a band in the arnoum..t estimated by the
+Crty Engineer to cover the r.osf of construcxion of improvexnents, cansfnaction
certificafiivn, "as-built" pFa.ns arad rrianumenting t.he street centerlines shal] be filed
vvith fhe City Engineer.
5. 'Femporary ou1-de-sacs a.re r~uired when streets terminate at the subdivisian
boundafies.
6. Tndividual driveway access Fermits are requured pnor to issuance of a buildang
pemait for driaeway approaches to the city road system. Dedication of 23 feet af
additiona] right-o£=way along Sullivan is requaxed.
7. 1bat the fina1 plat boundary be depicted as the westerly sectian line crf SectQn 25,
`I'awnship 24Narth, R.ange 44 E.W.M., and that the total right-of way dedication
from that line be shativn as 43 feet.
8. A statement shall be placed an glat dedicatian that.na direct access be allnwed from
residential l4ts to Sulliuan Road.
g. A11 public roads within the plat shall be designed and canstxucted to Spokane County
Staadards (as adopted by the City af Spokane Valley).
10. Sidewalks are required alflng the arterials orn Su1livan Rcrad and 24Ih Avenue.
11. That the rntearsection af 2[ldAvenue as proposed sha11 be Zocated so that it is
compatible witY+i the lvcation of the entrances to the proposed Central Va11ey -
Education Services camplex. This sha11 be cvordinated thrvugh the 4ffice vf the Cxty
. Engineer,
12. `I7Yat t,he City Engineering Departmerat sha11 review and appraVe, per the existing
operation and rnarntenance agreement, any and all fma.l Plat designs and Plat
dedication to assure the cantinued operataon and maintenasace of drainage facilitfes
' affecting the proposed plaf.
13. No diz-ect access t0 24'b Avenue from Block 10 is allarved as shown on Revievvs
PreXiminary Plat af Record.
14, .Access to 24`h Avenue from Lot 7, 81ock 1, is prahibited.
15. 'T'hat sidewalkS are requzared alvng lfi'h Avenue adjacent to the plat.
Extension of TAme Findings File Na. PE-1423-82 Page 5
. ~
16. That a 54-foot-wide easement for ingress and egress tv the retentiora pand shafl be
provided across Lcat 45, Biack 10. The 1ocation of this easement sha11 be apparvved
by the Cxiy Engineer prior ~o filing ofthe plat.
17. "The applicant is advised fihat there may exist utiiities either tnderground ar
overheat€ affecting the applicant's prvperty, including propert}+ to he dedicated or set
aside for future acguisition. The Gity o#' Spakane Va11ey wili assume nv financial
abligation for adjustrients ar relacation regarding these utilities.,' "The appiicarit
shauld contact tkie applicable uhlities regarding responsibility for adjustment ar
relocation costs azad ta make arra,ngements for any necessary work."
18. A Prafessional Engineer, licensed in the State ofWashingtan, shaN submit ~-Zna1 road
and tlrainage plans, a drainage report and raad and drainage catculations that
canfarm ta the 20(} 1 editian 4f tlle Spvkane County Standards far Raad and 5 evver
Construutivn, the current edition of the Spokane Cnunty Guidelines frrr Storrnwater
Manageznent, and ali applicable state ar►d federal Xaws. Fina1 road and drainage plans,
reYated calculatians and a d.rainage repcart shall receive the City Engineer's
acceptance priorr #o release of a constructian or building pernnit or approval ❑f the
final plat. Ferllowing plan acceptance by the City Engineer, drainage language wi11
be drafted by the City of Spnkazae Valley and provided ta the Sponsar's Engineer vr
Suzveyor for inclusion with the final plat d❑cuan~ent. .
19. Ez-oszan Contral: A Temporary Erosion and Sedimentation ControZ (TESC) plan is
to be grepa.red by aWA State licensed Professicrnal Engizaeer, and irnplemented •
thrvughvufi the duratian of constrructivn. The TES+C plan is ta be prepared using best
rnanagemen# practices (BMP's) curren#ly accepted within the Civil Engineering
pro£essiora. The TESC plan is to inctude, as a minirnum, a grading plaza,lacatian amd
details of silt cvntrol structures, and asireet cleaning prvgram. Runaff fiom expased
areas must be fi1tered prior tv diseharging into a detentian pond, 20$ svvale, or
infiltration facilrty. The TESG plan is ta be included in the road and drainage plans.
• The applicant's Engineer is to submit the TESC plag and suppvrting ca.leulaiions ta
the City of 5pokane VaIPey for reviavv, and shaJl receive acceptance as part ofthe
plan review process priar to site disturbance. The TESC major struGtures (such as
silt pands, silf txaps) ar-e to be installed priox to vther site wvrk and the TESC
measures are to be implemented and maintained thraughaut the duration of
cQnstruction, including house r.rrrastructian.
20. Any zaew draiaage sys#en outside of the public right-vf-way wi11 nexther be
maintained nor Qperated hy City of Spakane `Ja11ey farces. Prior ta pian acceptance
by the City Engineer, the Spvrasor shO provide a mechariism, acceptable ta the City
Engineer, for the perpetual maintenance of the storn2wafet drainage system. This
meehanisrn shall a1so prQVide for the funding of rvutine rnaintenance and the
replacemer►t of t,he vaai4us components of the drainage system at the end of the
service life of the respective carnponents, arxd any other improvements that rriay be
~
Extension of'i'irne Findings File Na. PE-7423-82 Page 6
r
legally required in the future. An Operation aud Maintenance Mauual far the
stormwater management systerri sha1l be prepared by the Sponsor's Engineer, and
incYuded in the project documents submitted tv the City Engineer for acceptance,
along with a discussion of the design life 4f the variaus compvnents, a calculated
annaxa1 cost for repair and a rnaintenance, and a carculated replacement cast. A
Horneawner's Assvciation ar other entity that is acceptahle to fihe City of SpDkane
Valley must be proposed and accepted by the City Engineer for perpetual
maintexaance.
21. The City Engineer has determined that this project permffi is exexupt under the
Phase I DevelopmeAt Regulations-Section IV (B) (2b). k'utuure time extensiau
will require review by the Gity of Spokane Vall~y Public Warks I]epartrnaent
For concurrency with the Spokane VaHey Camprehensive Plan.
SPOKANE C[]'CJNTY DIVISI[]N ClF UTILiTIES
1. The dedication sha11 state:
"Me awner(s) ar successvr(s) in interest agree to authvraze tkie County to p1ace their
name(s) crn a petitivn fvr the £vnnativn of ULII) by petition method pursuant to
RCW 36.94, which petitivn includes the awnex(s)' praperty; anti fiu-ther not ta abject
by the signing of a protest petitvn against the fnnmativn of aULIiJ b}r resolution
methvd pursuant to RCW Chapter 36.94 which includes the awner(s)' progerty.
, PR[]VIDED, tl2is condifiian shall nat prohibit the nwner(s) ar successvr(s) from
objectang to any assessment{s} on the property as a result of itnprouements ca.iled faar
in con,unctian vvith the fvrmation of a ULXD by eit3aer petition ar resolurion method
under RCW Chapter 36.94.,,
2. Any water service for #his prvject shall be provaded in accordance wath the
Covardinated Water System Flan for Spuka.ne Caurety, as ameraded.
3. Applicant shall make caznection to t.he public sewer systen. Sewer connection permit
zs required. PPans and specificatzQns are xa be rerriewed and appraved by fihe I3ivisian
of Utilities.
SPOKANE REGIDNAL H;EALTH DISTRICT
1. A combined surface water and sewage disposal detailed plan shall he appraved hy
t.he Spokane County Engineer and Spokane Cvunty Health 1]istrict priar to the
issuance of any an-site sewage disposal pez-cnnit or building permit for the praject.
2. Wafer ser►rice shall be by an existing public water supply when appraVeci by the
ltegiona1 Engineer (Spakane), itate Departzrient of Health.
3. Prioar to filing the final plat, the sponsvr shall pzeseza.t evidence fihat the plat lies within
the recarded service area of ttie water systern proposed ta serve the p1at.
Extensian vfTime Findings File No. PE-1423-82 Page 7
4. The dedicatory language an t.he plat shafl state: "Use of griVate wells and water
systems is prvhibited.
5. Disposal of sewage effluent beneath paved su.rfaces is currently prohibited.
DATEI3 THiS 26' I7AY OF AUGUST, 2003.
T '
Mic HaznoES ,
Assrrciate FTanner
Under state 1aw and city ordinance, ycsu have the t-ight to appeal this decisian to fihe City
vF Spmkane Valley Hearing Examiner. Upon receipt of an appeal, a public hearirtg will be
scheduled. To file such a.n appeal, yvu must subrnit a letter alang with a processing £ee,
payable ta the City of Spokane Valley, wathxn fvurkeen (14) calendar days ~'t'om the date
this decisian is signed.
If you have any questions, please caLl rme at 688-0048.
c: WANIA&
Spokane Cvunty T]ivasian of []tilities; 7im e
Spokane Regionaa Health I]istricfi: Steve Holderby
Spokane Gounty Fire i'ratection District No. 1
Vera Water & :Power
Steve Valkenaar, 15607 E20 Ave., Spokane Valley, WA 39[}3 7
Extension of Tirrie Findings File TIv. pE-1423-82 Page 8
r
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S CITY OF ~
00000
p o~
Valley
11707 E.Sprague Ave. • Suite 106 • SpokaneVaHey,WA 99206
{5(}9} 921-10(}0 • Fax (509) 921-10(]8 • ertyhall@spvkanevalley.vrg
- MEM[]RANI]UM ,
TU: , a
Spokane Caunty Division of L7tiTities; Jim R.ed
Spokane Regional Health District; Steve HQ1derby
Spokane Cvunty Fue Prafection I]istr-ict No. 1
Vera VVater & Pvwer
FR,UM: NTicla Hamois, Associate Planner `?X~
DATE: August 7, 2003
SLTBJECT: Extension vf Time far PE-1423-$2
The Cxty vf Spokane Valley I)epartment of Coxtimunity Development has receivei the
attaehed request fvx an Extensimn of Time for ffie preTiminary plat vF Ridgemont Estafies
#{4, PE-1423-82. T have also attaeheel a copy vf the last exterision af time decision issued
by the Spokane County Divisivn of P1anning on May 22, 2002. Tkie decision was tv
expire an June 1, 20[]3 but that date was extezaded by the City of Spokane Va11ey
. I]ivision vf Current P1anning tv July 31, 2003 due tv the incorporation of the City of
Spokane Valley and the lack ofixnmediate accessibility tv Fi1e #PE-1423-82 which has
now been obtained fr4m the Spokane County Divisian of PYanning.
Tf yvu have cvmments ~n the propased extensivta or belieVe that additionai canditions
should be made part ofthe preli.rrinary plat appr+aval, please fvrrward ccymments to my by
August 21, 2003.
Enclasuae
Capy wIv enclosures: Steve'Valkenaar, 15601 E. 24h, Spokane Valley, WA 99037
J , -
CITY OF SPOKANE VALLEY
APPLICATTON FOR EXTENSION OF TIME 9f
DIVISION OF PLANNING
,c
NAMEOFPLAT/FII.ENO: Ridc~mont Estates #4 P.E. 1423-82 pPpp~pCf ~ p~~
~UN~O Q
PARCEL NO: poT- t i Qn nf d 5 7 51 _ 9(1 R n
APPLICANT (NAME OF LEGAL OWNER): Grace Harvest Fellowship
MAILING ADDRESS: 15601 E. 2 4 t h
CITY: Veradale 5TATE: WA 71p:99037
PHONE: (work) 9 2 6- 3 2 54home) (fax)
IF APPLICANT IS NOT THE OWNER, INCLUDE WRITTEN OWNER AUTFiORIZATION FOR
THE BELOW OWNER'S DESIGNATED CONTACT TO SERVE AS REPRESENTATIVE
OWNER'S DESIGNATED CONTACT: Steve Valkenaar
MAILING ADDRESS: 15601 E. 2 4 th
CITY: Veradale STATE: WA ZIp: 99037
PHONE: (work) 9 2 6- 3 2 5 4 (home) (fax) 9 2 4- 61 7 7
1. Has any portion of the plat, short plat or BSP been finalized (recorded)?
Yes, 1st through 7th Additions have been finalized
2. Has a proposed final plat, short plat or BSP been submitted to the Division of Planning?
Yes x No If no, why has the plat, short plat or BSP not been finalized?
What has been the delay? ceQ__.a 4-
3.What progress has occurred: What conditions of approval have been completed (such as survey
work, improvements constructed, departmental approvals obtained)? See attaChed
,
-
4. Is this a phased projeet7 Yes X Na If yes, please complete the fnllowing in#"vrmation:
No. nf lofs originally approved: 2 $ 5 No. of phsses fittalized to date; 8
Nn. vf lots remaining tn he fin,aIiaed: 1~ iVo. of acres remaining ta date: r,?
LEGAL OWN'ER SIGl►IATCIRE
(Signature af legal nwfler or representafive as suthariaed by tegal nwnQr)
stp-v_e , Valkenaar , (prine name) SWEAR vRAFFIRM THAT
THE ABD'VE RESPClNSES ARE MADE TRUTHFClx.LY ANfl TO THE BEST flk' MY K1YOS3ZET'1GE.
Z k"URTHER SWEAR QR A"IRM THA,T T AM THE UWNER OF RECCiH1] OF THE AREA PRQPUSET7
F'UR "THE ABUVE TDENi'IFIElI LAND LISE ACTTON, QR, II' NQT"i'HE {IWNER, ATTACHED
HEItEWITH I3 W.[tMEN PERMISSIQN FRQM TSE Q'4VNER A,TJTHO,RTZIlYG MY ACTIQIYS UN
HCSIHElt BEII3AT,F.
AnnRESS: 15601 E. 24th [ 5U9 ) 9Z6-3254
CI`I'Y: Veradaie 1 ST4 E: WA Zip: 99037
NOTARY
STATE OF W.4SHINGTON ]ss:
CI'I°Y OF S1'OKANE VALLEI')
SiJ$SCRIBED AND SWORN To befvre me th15 _(Iay af , 20 C)J
Z3
NoT ~;P7 '
H
~p't~'~'~ ~ `
~~G'I ...y! ek, NC]LY STGNATURE
~VVotary Public in and for the St$te of'Waslsington
s's ra 1t Lsidiug at: ~t
G~~►1 LV~~,.C~ ~~--n~
: 'O► ~
23,~:
,rF•••,:.:..•
OF '~H+r~~iF~ts+~►►~► My appomtrnent expire.s: c~23 )-ob ~
r
1
naTE sUBMrrr~: RECErvED ar
AMQUNT RECEIVED. RECIIPT Nfl:
~ - -
Attachmenf to Application for Extension of Tune
Ridgemvnt Estates # 4, PE 1432-82
As nQted in the Findings of Facts, +Cvnclusians of Law and Y7ecasion, dated May 31, 2[}04,
granting an extension of time for Ridgemont Estates 94, Ridgemont 1Estates 44 vriginally
encompassed all of what is mow Ridgemont Estates Nortb. The County requested that the Plaf be
spiZt inta Ridgemvnt Estates 4' Addition, and R.idgexnant Estates fiiarth to avoid canfusion aVer
the multiple phases of the origina128S lot plat, and ta enswe that phases of the Plat adjacent to
the existang County roatis would be developed along wi#h phases an ihe interior of plat. As
revised, Ridgemant Estates 4' AdditiQn includes 131 lots.
To date seVera (7) phases have been finalized 1eaving apprvximately lats to be
finalized.
Tn tlze catendar year 2000, the AppZicants subrtitted FinaJ Plat drauings for Ridgemont
Estates #4, 7' Addition. The Cvunty Engineer requested a charige in some of the stvrm vvater
drawings and some of the plat c3rawings. Tn the year 2000, arid the bea nning of 200 1, the
Applicant modi.fied the fmal engineering dravvuags acconunodate the County Engineex's coneerns
and to rnadify tiae drawings to reffect the widenirrg of Sullivan Road, which occuutrxed in the year
2000. On 200-, Ridgeznont Estates #4, 7' Adriition was finalized and recDrded.
Iats remain in the prelaminary plat of Ridgemont Estate #4.
. /1
BEF[3RE SPOKANE CUTJNTY DIVISYDN QF PLANNrNG
IN THE MATTEIt [)F AN EXTENST[]N )
[]F TIMME REQTT]EST FQR PE-1423-82, } FYNDINGS OF FACT,
RII3GEMQNT TSTATES #4, AN ~ carrcLUs~ONs ANn
AFPR4VED PRELIIViINARY PLAT } AECTSIpN
THIS MAT"I'ER, a request for an extensivn of tirrze from Gxace Harvest Fellavvship has been
received and decided upon, pursuant to Spakane County Subdivision regazlataons (Section
12.100.11$) and RCW 58.17.140.
FIN)INGS UF FAGT
1. The individual signing below has been praperly delegated th.e responsihilYty for rendering
this decision by the Directar of the 5pokane County Divisifln of Planning
2. The vriganal development pzoposal was ta subdivide appraximately 125 acres into 2841ots
for single fartzily residences. Orngina.lly, Ridgemant Estates 4" Addition encflmpassed all
of what is rzow Ridgemont Estates Nozfih. The Caunty requested the plat be split irato
Ridgemant Es#ates 4hAddition and Ridgennont Estates North tv avoid eonfusian aVer the
multiple phases of the rrriginai 2$41ot developrnent. The ariginal proposal also inctuded a
zvne xeclassification frnm Agricultural (A) to Single F'amily Residential (R-1) under the
now expired Spokarae Caurity Zoning Ordinance.
3. The subject preliminary plat was approved by the Board of County Cvmrnissioners on Fu1y
27, 1982.
4. The proposal is generally Iacated adjacent to 16'" Avenue, Sullivan Raad and 24hAvenue
in Sectian 25, Township 25 N., Range 44 EWM, SpQkane County, Washington.
5. The existing zaning of the prcrperty descnbed in the applicativn is Urban Residentiai-3.5
(UR-3.5), established on 7anuary 1, 1991, consistent with the Pragram ta Implement the
Spokane Caunty Zaning Code, and remains in place as res►xlt of the adaptian of the Phase
T DeVelapment Regulations by the Baard of Caunty Comrrisssioners an January 15, 2042,
Resalution #2-0037.
6. The Cozxaprehensive Plan origina.lly designated the area of this preliminazy plat as LTrhan
(U). The new Comprehensive P1an designatian for the subj ect site is Low Densiiy
Residen#ial (LDR) as a resu.lt ❑f the adopfiian of the Phase I Development Regulatzans ta
Implernent the Cvmprehensive Plan by the Board of Ceunty Camrnissioners on Januaryr
15, 204)2, Resolution #2-0037.
7. The subject property is located inside of the T]rban ~'rrourt,h Area (UGA).
8. Spokane County has established specific criteria for consadering the extension of time for
the expiratian of pxeliraainary subdivisians, specifically for regular subdivisaans, and
department policy far short subdiGisiQns. These criteria are fourid in Section 12.100.118
(Extensions of Tame) of the Spokane Couniy Subdiuision Ordinance and haVe been used
as a basis for this decision.
, ,
Extension of Time Findings File No. l'E-1423-82 page 2
5ectian 12.100.118 states that "Tkae Director may aclministratively approve an extensipn
pravided there aze nca significan,f changed conditians which would render filing of tlie pFat
or hinding site plan contrary ta the public health, safety or general welfare, and further
provided vne ar mflre of the fallawiaig circumstances is faund fa apply."
1} That some portion af the exisling pre2iminary plat has beeaa fnalized sfnce the last
extensaon wus gr•anted and the ramainin$ lats wvuld forrra a unifzed development
cvnsasteni wrth the origznal approval;
RESPONSE: Seven (7) phases o£the prel'azninary plat have been finalized to date and
recarded wath the County Auditor. The remaining lots wil1 form a unif ed
deVe]Qpment cansistent with the ariginal appraval.
2) 2'hat the preltminary subdrvisron, short subdivision, ar hznding site plan rerrtazns
generally consistent wzth the original plat or Brnding site plan that was approved, and
the sponsor has iaken substantral steps tcrwcrrdsfinalizzng the plat ot' brnding site plun,
which shall rnclude one, but is not limited to, fhe follawing:
a. surveying the lats within the development;
b arrangingforpublac.servaces to the site;
c. ahfaining necesscrry fananczng for a21 or a portion af the preliminary .rubdiviszon,
shart subdivasian, ar banding site plrxn;
d. the completion of staEdies or other requirements whach wers part af prelimrnary
suI3dI1ji3YOYl, short subdivisian, ar brnding site plan apFraval.
RESFQNSE: The preliminazy subdivision remains consistent with the aziginal plat that
was approVed. In additron, the applicant has finalized 105 of #he Qriginaily approved
lots, with 26 lots rernaining. Tfiose 105 lots have been sunaeyed and cvnnected to
public sewer.
3) 7'lzat rat the time the prelirrinary plat approval yvas gP-arated, development of the
proposal was conditioned upon the extensivra ofpublic services whach are not yet
avaidrrble. This provasion shall rzat apply to pulalrc utility extension whrch the project
sponsor wauld narmally fund.
R-ESPONSE: Ncat applicable.
4) That administrative delays have caused the inahrlity of the applicant ta finalize the
plat wrthFn thefive (5) ysar time perrod.
FtESPONSE: Not applicable.
9. This is fhe eleventh request far a time extensian. The total life of the preliminary plat has
been appraximately tweraty (20) years.
10. The proposal has been cireulated tn al1 affected agencies and departments fvr comment.
Additional andlor revised canditinns of appraval have been recammended by the Sgakane
County Division o£ Engineering and Raads. These recammended conditians of appraval
are included belQw.
.
Extension of Time Findings File No. PE-1423-82 Page 3
CONCLUSIONS
BASED UPON A REVIEW of (a) the criteria for approving an extension of time of the
expiration date for a preliminary plat and (b) the above Findings of Fact, the following
conclusion is made:
The proponent has demonstrated progress toward completing the preliminary plat as
evidenced in the above Findings of Fact and there are no significant changed conditions
which would render filing of the plat contrary to the public health, safety or general
welfaze. Therefore, a one (1) year extension of time is warranted.
DECISION
BASED UPON THE ABOVE Findings of Fact and Conclusions, an extension of time request
for application PE-1423-82, Ridgemont Estates #4, is hereby APPROVED until June 1, 2003.
CONDITIONS OF APPROVAL
SPOKANE COUNTY DIVISION OF PLANNING
1. The preliminary plat is given conditional approval for one (1) year, specifically to June 1,
2003. The applicant may request an extension of time by submitting a written request no
later than thirty (30) days prior to the above expiration date.
2. The proposal shall comply with the Urban Residential-3.5 (UR-3.5) zone, as amended.
3. The final plat shall be designed substantially in conformance with the preliminary plat of
record. No increase of density or number of lots shall occur without a change of condition
application submittal and approval.
4. A final plat name/number shall be indicated before the final plat is filed, such
name/number to be approved by the Planning Director/designee.
5. Appropriate road name(s) shall be indicated.
6. The Planning Director/designee shall review any proposed final plat to ensure compliance
with these Findings and Conditions of approval.
7. Appropriate utility easements shall be indicated on copies of the proposed final plat.
Written approval of utility easements by appropriate utility companies shall be received
with the submittal of the final plat.
8. The final plat map shall indicate by a clear, dashed line the required yard setbacks from all
private, "Tract X" or public roads. The dedication shall contain the following statement:
"Side yard and reaz yard setbacks shall be determined at the time building permits are
requested unless these setbacks are specifically drafted on this final plat"
• I ' ~
Extension of Time Findings File Na. 1'E-1423-82 Page 4
9. Three (3) current certif cates of #itie shall be furnished to the Planning Department prior ta
filing the final plat.
10. Priar to filing all or a portion of a final p1at, the applicant's surveyor shall submit one or
mare maps autlined in red of the area being finalized. The scale shall match the
apprapriate assessor's znap seale.
11. A survey is required priar to the fi1ing of a finaT plat.
12. The final plat shalP indicate yard setbacks arc Iengths Qn cul-de-saG lots which meet Qr
exceed the rninimuxrh frontage of the underlying zone of the f nap plat.
SPQKANE COiUNTY I?YVrSTDN OF ENGTNEERING AND RQADS
1. Conditional approval of the plat is given by the Gvunty Engineer, subject to dediGation of
right-af way and agproval ofthe aroad system as indicated in the prelimir►ary plat of
record.
2. Canstructivn within the propased public streets and easements sha11 be performed under
the direet supervisian a£ a licensed engineerlsurveyQr, who shall furnish the County
Engineer wifih "as-built" plans and a certificate in writing that all impr❑vements were
installed ta the lines and grades shown on the apprvved constructian plans and that alI
disturbed monuments have been replaced.
3. No constructian wQrk is to be performed rAdthin the existing ar proposed public
right-of way until a permit has been issued hy the County Engineer. A1F wvrk as subject
to inspection and apgroval by the Catiuaty Engineer.
4. All construction within the existing vr proposed public right-of-way is to he completed
prior ta filing each ~'inal plat, or a bond 'rn the amaunt estimated by the County
Engineer to cover the cost of Gonstruction of improUements, G{3n5tr'l1GtJC}I] CeII°t11f CatI4?7,
"as-built" plans and monurraenting the street centerlines shall be filed with the Caunty
Engineer.
5. Appropriate proVision sha11 be made that the following-described property be held in trust
unti1 the cantinuation of the streets be dedicated ar deeded: a one (I)-foot stzip at the ends
❑r edges of aLl streets th.at terminate or barder the subdiuision boundary. Ternparary cul-
de-sacs are required when streets terminate at the subdivisian bouuadaries.
6. Individual driveway access pernsits are required prior to issuance of a building permit for
driveway appraaGhes ta the eaunty road systetn.
7. Dedicatitrn of 23 feet of additional right-o#=tivay alang Sullivan R.oad is required.
8. That the final plat boundary be depicted as fihe westerly section line of Section 25,
Township 24 Nflrth, R.ange 44 EWM, and that the tota.l right of vaay dedicatian from
that Iine he shown as 43 feet.
9. A statement sha11 he placed in plat dedication that na darect access be ailowed €rorn
residentiallots ta Sulliva.n Road
i •
,
Extension of Time Findings File No. PE-1423-82 Page 5
11. All public roads within the plat shall be designed and constructed to Spokane County
standards.
12. Sidewallcs are required along the arterials on Sullivan Road and 24`h Avenue.
13. That Public Road Standard Typical Roadway Section be Section Number 2 for 16th
Avenue with minimum paving width being the Access Standard, Section Number 2 for
other public roads within the preliminary plat with minimum paving width being the
Access Standazd, and Section Number 2 for 24th Avenue with muumum paving width
being the Collector Standard.
14. The proposed subdivision shall be improved to the standards set forth in Spokane
County Boazd of Commissioners Resolution No.1-0298, as amended, which resolution
establishes regulations for roads, approaches, drainage and fees in new construction.
15. T'hat Sullivan Road be improved to the Typical Roadway Cross Section designed by the
Spokane County Engineer for the Sullivan Road Project CRP 1679. These
improvements shall be made on the east half of Sullivan Road along the westerly plat
boundary.
16. That the intersection of 20" Avenue as proposed shall be located so that it is compatible
with the location of the entrances to the proposed Central Valley Educational Services
complex. This shall be coordinated through the office of the County Engi.neer.
17. That the County Engineering Department shall review and approve, per the existing
operation and maintenance agreement, any and all final Plat designs and Plat dedication
to assure the continued operation and maintenance of drainage facilities affecting the
proposed plat.
18. No direct access to 24th Avenue from Block 10 is allowed as shown on Revised
Preliminary Plat of Record.
19. Access to 24th Avenue from Lot 7, Block 1, is prohibited.
20. That sidewalks are required along 16th Avenue adjacent to the plat.
21. That a 60 foot wide easement for ingress and egress to the retention pond shall be provided
across Lot 45, Block 10. The location of this easement shall be approved by the County
Engineer prior to filing of the plat.
22. "The applicant is advised that there may exist utilities either underground or overhead
effecting the applicant's property, including property to be dedicated or set aside future
acquisition. Spokane County will assume no financial obligation for adjustrnents or
relocation regarding these utilities." "The applicant should contact the applicable utilities
regazding responsibility for adjustment or relocation costs and to make arrangements for
any necessary work."
Extension of Time Findings File No. PE-1423-82 Page b
23. A Professional Engineer, licensed in the State of Washington, sha11 submit final road and
drainage plans, a drainage report and road and drainage calculations that conform to the
2001 edition of the Spokane County Standards for Road and Sewer Construction,
and the current edition of the Spokane County Guidelines for Stormwater Management,
ad 4 n oviaarl nnnrl't}ens ^vf &^pPx6VaI F-'•'el rl and droinana lanv_eDholl •ie nnmrlcr
*Ath a11 applicable state and federal laws. ' ' j . Final road
and drainage plans, related calculations and a drainage report shall receive the County
Engineer's acceptance prior to release of a construction or building permit or approval of
the fi.nal plat. Following plan acceptance by the Spokane County Engineer, drainage
language will be drafted by Spokane County and provided to the Sponsor's Engineer or
Surveyor for inclusion with the final plat document.
2-4. gr-antgd te Spek.ang Ge~~ty--and/eF an
-o' -tnnonnn nnti+. miic+ bo prnv'i7ad fnr nll nlamanta nF 41~n rire+nena r+l~n in ~+rrlc~r 41~nt
~______o_ r_____~
A hem imc c anann:n4in++ annop+nbln
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TPTI~]l~A P T+ AY M~]trf'Ah~]f~l~P lYf _tl1P~71#.]~'2: Ha(~P Pf1tC Tl~d 1Y1~]l)G~df+I~h~v (~`~PC~
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EZSgiaGG2 T L~A +DYf7TL`G ~]!~/~P~n - 11 ~]rt 11F~P e~POirtt1Pl~ t!1 l1MYM A fI~]tPtYIP ~9ivr~ifl~
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nlT1HnPY Yf iAT *ll Tl 7l ciil+mithol /l'F_YeQd Zttl1_dYaiY1a(`(0 Y~~nt~,c' The [~+l !~<f l~~]ll I~t)O~ii2+ta +{~0
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fe FR efted
,Gting and iagl#ating star4nwatp.F. The study shall also OV-9-11-JaW, t-h-e-A-04 GtS Of i p
;V~Wrr, SUG14 -rtiG systom offluont and ;A.,_ater used for. la3A% iFfigation. If it is determined
ne.gative i . . r-obable,
. ,
• 1
Extension of Time Findings File No. PE-1423-82 Page 7
. ,
, .
,
,
, .
28. Erosion Control: A Temporary Erosion and Sedimentation Control (TESC) plan is to be
prepared by a WA State licensed Professional Engineer , and
implemented throughout the duration of construction. The TESC plan is to be prepared
using best management practices (BMP's) currently accepted within the Civil Engineering
profession,
. The TESC plan is to include, as a minimum, a grading plan, location
and details of silt control structures, and street cleaning program. Runoff from exposed
areas must be filtered prior to dischazging into a detention pond, 208 swale, or infiltration
facility. The TESC plan is to be included in the road and drainage plans. The applicant's
Engineer is to submit the TESC plan and supporting calculations to Spokane County for
review, and shall receive acceptance as part of the plan review process prior to site
disturbance. The TESC major structures (such as silt ponds, silt traps) are to be installed
prior to other site work and the TESC measures are to be implemented and maintained
throughout the duration of construction, including house construction.
n4 i~+ rhacar~ ar~d er~n r.]nca dnYn dn n nno4hv hosn fnr nne-'n-l ~111 11 1 M 1
r r r Y
Aand ~
i~o CMD /lll'YlY1~P+~~ HA Or*~T~od Pr-iA *A }tp
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Subm;+t-a-I 4 ri,,,s fcs,,,.r *ax~,o ,~of;rzr,~orrc+i:~aSg Af ~3~~GVolAp~3ent--O~3P f06t i~0-aG6_~~ e*~s
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30• yholl bn e~nc+nd ~rit~ +ho re~i~r~4J tr ~ir~bni.anr r:n +n f' .~l 1..t nn o4r*- -F
t' Y
31. Any new drainage system outside of the public right-of-way will neither be maintained nor
operated by Spokane County forces. Prior to plan acceptance by the County Engineer, the
Sponsor shall provide a mechanism, acceptable to the County Engineer, for the perpetual
maintenance of the stormwater drainage system. This mechanism shall also provide for
the funding of routine maintenance and the replacement of the various components of the
drainage system at the end of the service life of the respective components, and any other
improvements that may be legally required in the future. An Operations and Maintenance
Manual for the stormwater management system shall be prepared by the Sponsor's
Engineer, and included in the project documents submitted to the County Engineer for
acceptance, along with a discussion of the design life of the vazious components, a
calculated annual cost for repair and maintenance, and a calculated replacement cost. A
Homeowners Association or other entity that is acceptable to the Spokane County must be
proposed and accepted by the Spokane County Engineer for perpetual maintenance.
l "
• \ ,
Extension of Time Findings File No. PE-1423-82 Page 8
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d`Tt-hg S'pekang-1o8gi w'c
;nnq_ }~tc~ r~r nr~nc~i..v.~A~ n~~}~~~inei nr~ nr r~n~rnlnr~mnr~4
hMrirln 6*nrMWa4nr rUnng PrnWomn. C j.+. v .~uvua
~
rartirii'ato in n plnnnt'~g_~~~~~~monta}iKCa'n of &Pat'w''''tf-c}'°i$ iA4dPsi6fffiw&}~
CCi
cc
1~'1'111A(I~171~T1t TT(1QMtY1 ~nrl tn tln.~ n,.nl~ re4no onrl nl~o nna ea mo y l~.n fi n!1 *l, l. l.l'
-------a------- r-~-a- t..,.~ ~
ht+ar4na ns f@r SArviGPOr hPn&ft nht;4n~
►+J+' ho Y*+lo pAr+rtbdacibnn nG M mni 4n~
~ > >
»
-Y.. T}111 Ynrnliminary pl04 io lnnatad within the Arniifn Qnneitivv A n Dr-ainage 1
ir "Ja}Ear_nneli+v T.-on4mnn4 Rnrn i mme M nrn n4 no
,
BP_fnrn +hn rend ~nd ~rninartn r~lnr~n nra nbFAi1-F r~ 4 Cr~nl n nG 4. rn~sin~a~ nn~
a r Y
~
p.S. ThG '+nnnonr ohell onnuirn apprnvol f +hn nvninn
dr-ainagG ~
DemAa#ian rza.ueet shall ;r:,,:o~1„~1A ma v ~10~~•-;.,+'v~vzxpc~ „
1 :ucicr-9~39~ F~2i~'31P13ai36F'a ~'PSp9~Sib~a°.".. T_h6'
7pplinonf nhall maICe prA.V3C1e31 fc^r:r tizcr-I7vxpc°+Caux xxx4}nt+n'66 vf ~T ~a~$gg ta6i3itips
lasatedLaukside, af th@ ;Rb1iCT"r-iSf3t 1e* ~vay. Tfig dPei~[~g--1pe~}}}C~}}~}@Pr mn y dnr~~~
il n
P[~1gYf 1 ~e~tln*iAn m~]yT""""" i CJ']~ \ lRC1iI'cJ ClS ,pppIRVaI eIZ CIZO PoOign PvviaGiAIZ ZIZ thir,
nrn~ns'~~ t~}o r^»r~t), HTliinOPY m ~ t}~n
r r~, a3~i .esP & 66$di~6F~ A-~&ppr6r ~ &r * ~at r
--e~=o
dr-'aai'1'apn 4ron+mnnf nnci ain.~nnl f nilifinn bo Wnd ncrfifinra Yrier to nny final-pl4
Ne-11, !7~' Additien. ,.oa o,. +ho, ~9-5
Rear-d 2= r~~m4;siengrsrRese-11-3tien Tile. 95 -04$S; She~~~ ~ EK4e.nsien ef Time ho
(=t'~}~_7 tl'h !~dditior~ cball hacra niv mnr~4}~c~ ~i-gm 4ha tima nf rta 4i n c-4-f 4 1.
t7'
$~ti~v~~-~e~st~F~~e~:-~~g~~ si~-~e~t-~ t~~ A,.•„a •f +~,A ~ _edd;+;,,., hwz f;iod
~
fina4 plAt, U3P-.x3 1t54 Y'g-qaiivQ cv oviipi`7'-`Ai~ cxic°rMest 6u~Poni-ec3t3en 6f the Spekane
37. The County Engineer has determined that this project permit is exempt under the
Phase I Development Regulations - Section IV (B) (2b). Future time extensions will
r` . J
e I• 4 J'I
Extensian of Time Findings File No. PE-1423-82 Page 9
require review by the Spokane County T3ivision of Engineering for concurreney vvith
the Spakane Gounfy Camprehensive Plan.
SPOKANE C[7UNTI' DIVISION OF IITILITES
1. The dedicatian sha11 state:
"The owner(s) or successor(s) in interest agree to authorize the Cvunfiy to place their
narne(s) on a petitian for t.he formation of LTLZD by petitian method pursuant to RCW
36.94, which petiticrn includes the owner(s)' property, and further nat ta abject by the
szgning af aprotesi petition against the fQrrnation of a ULID by resolution method
j]t1XSL1aI1t t0 RCW C}.laj]teI' 36.94 VYhlCh 1L1GllldeS t1e OWIIeI(S)' praperty. PROVTDEr1, this
candifiiQn shall nflt prohibit the Qwner(s) ar successor(s) fram vbjecting ta any
assessment{s} on the properiy as a result of improvements called for in conjunction with
the formatian of a ULIT7 by either petition or resolution method under RCW Ghapter
36.94,,'
2. Any water service for this prajact shall be proGided in aceQrdance with the Coardinated
Water System Plan for Spokane County, as amended.
3. Applicant shall make connectivn to the public sewer systern. Sewer connectiQn permit is
required. plans and specificatians are to be reviewsd, and approved hy the Dpvision af
Utilities.
SPnKANE REGIQNAI, HEALTH 1r1ISTRICT
I . A combined surface water and sewage disposal detailed plan shall be approued by the
Spokane County Engineer arrd Spokane Cvunty Health District privr to the issuance of any
on-site sewage disposal permit ar building pernut for the praject.
2. VVater service shail be by an existing puhlic water supply when appraved by the Regionai
Engineer (5pakane), State Department erf Health.
3. 1'riar to fiiing the fmal plat, the sponsar shalI present evidence that the plat lies within the
recarded service area af the water system proposed to serve the plat.
4. The dedicatory language nn the plat shall state: "Use of priVate wells and water systems is
prohibited."
5. L)isposal of sewage effluent beneath paued surfaces is currently prohibited.
. ' i
Extension of Time Findings File No. PE-1423-82 Page 10
DATED THIS 22nd DAY OF MAY, 2002.
~vv~u
Tammy Jo s
Associate P ann r
Under state law and county ordinance, you have the right to appeal this decision to the Spokane
County Hearing Examiner. Upon receipt of an appeal, a public hearing will be scheduled. To
file such an appeal, you must submit a letter along with a processing fee, payable to the Spokane
County Division of Planning, within ten (14) calendar days from the date this decision is signed.
If you have any questions, please call the Spokane County Division of Planning at 477-7200.
c: Spokane County Division of Engineering and Roads
Spokane County Division of Utilities
Spokane Regional Health District
Stanley R. Schultz, 422 W. Riverside, Suite 1100, Spokane, WA 99201
Steve Valkenaar, 15601 E. 24t' Ave., Spokane, WA 99037
! S06lne v Department of Public Wmrks
11~
. w-ey MEM[]RANUUM
August 25, 2003
To: Micki Ha-nvis
Fram. Sandra Raskell ~
,
Re: PE-1423-82 - Extension For time (Ridgemvnt Estates)
PubYic WarkS has reviewed the request far tirne extension far the above mentioned
project. The follvwing conditiQms shall be included in tlae findings and order.
I . Conditional approval af the plat is given by the City Engineer, suhject to
dedicativn vf rigint-vf way and appr4Va10f the road systezn as lndicated in the
preliminary plat af record.
2. Constr~ction within the praposed public streets and easements shall he performed
under the direct supervision of a licensed engineerlsurveyer, whv shali fumish the
City Engineer with "as-built" plans and a certifacate in vvrgting that a11
xraaprovernents were installed to the lines and grades shown on the appraved
construction plans and that all disturbed monuments have been replaced.
3. No construction work is to be perfarmed within the existing ar proposed public
right-of-way until a perrntt has been issued by the City Engineer. All work is
subject to inspectivn aa.nd approval by the City Engineer.
4. All construction within the existing vr proposed publrc right-Qf-way is to be
completed priar to filing each fnal plat, or a bomd in the amount estimated by the
City Engineer to caver the cost of construction of imprQvements, eonstruction
certificaCion, "as-bui1t" plans artd monumenting the street ceraterlines shall be filed
with the City Engineer.
5. Temporary cul-de-sacs are required when streets terrninate at the subdiuisitrn
bvundaries. 6. Individual driveway access permits are required prior to issuance vf a buildPng
permit for driveway approaches to t,he city road systern.Dedicatiara vf 23 feet of
additianal right-a£ way along Sullivan Road is required.
7. That the final plat bQUndary be depicted as the westerly sectinn line of Section 25,
Tawnship 24 Narth, Range 44 EWM, and that the tatal aight-of-way dee3ication
ftam that line be shawn as 43 feet.
- 11707 E. Sprague ■ Swite 106 • Spolcane Vailey, WA • 99206 •(S09) 921-1000 • Fax (509) 931-100$
~
A statemeret shall be placed in plat dedication that no direct access be allowed
frbrn residential lots to SuIlrvan Road.
,
9. All public roads within the pPat shall be designed and constructed to Spokane
County Standards (as adapted hy the City of Spokane Valley).
10. Sidewallcs arereguired along the artenals an Sullivan Rvad and 24`h Avenue.
11. That the intersecticrn of 20'' Avenue as praposed sh ' all be located sa that it is .
cornpatible with the locatrvn of the entraraces tv the propased Central Valley
Education Seruices complex. This shall he cQQrdinated through the affice of the
City Engineer.
12. That the City Engineering Department shall review arid approve, per the existing
operation and maintenance agreernent, any and all final Plat designs and Plat
dedtcation to assure the cantinued aperafiian and rraaintenance of drainage
facilrtres affectin,g the proposed plat.
' 13. No direct aecess tv 24`h Aaenue from Block 1[] is allowed as shown on Reviews
Prelixninary P1at of Recarti. .
14. Access to pedlAvenue frQm Lot 7, Block 1, is prohibited.
15. That sidewalks are required along 15"' Aaertue adJacent tv the plat.
16. That a6a faot vvide easement for ingress and egress to the retention pand shall be
prarrided aGrvss Lot 45, Blvck 10. The lacatimn of khis easement shatl be
approveti by the City Engineer priQx to filing of the plat.
17. "The apglicant as adwised that there may exist utilities either uriderground or
auerhead affectYng the applicant's praperty, including property to be dedxcaked or
set aside future acquisition. The City of Spokane Valley will assunae nv financial
abligatian for adjustments or relocatian regarding these utilities." "The applicant
should contact the applicable utilities regarding responsibility far adjuslrnent Qr
relvcatian Gosts and to make arrangements fvr any necessary vvnrk.="
18. A ProfessiQnal Engineer,licensed in the 5tate of VVashington, shali submit final _
road arad drainage plans, a drainage repart and road and drainage calculations that
ccrnform to the 2001 editivn of the Spnkane Cvunty ~tandards for Raad and
Sevver CvnstructiQn, the current edition of the Spokane Coranty Guidelines far
Stormwater Management, and aIl applicable state and federallaws. Final road
and drainage plans, related calculations and a draianage repvrt shall receive the
City Engzneer's acceptance prior to release of a CvnstruCtivn vr building permit ar
, approvaY of the finaZ plat. Follawing plan acceptance by the City Engineer,
drainage language will be drafted by t.tze City of Spakane ValIey and provided to
the Spvnsor's Engineer vs Surveyar for inclusiQn with the inal plat dncument.
11707 E. Sprague • Suite 106 • Spokane Valley, ►'VA • 99206 ■(509) 921-1000 ■ Fax (509) 921-100$
19. Lrasinn Cvntral: A Temparar}+ Erasivn and Sedimentatinn Crantral (TESC) pYan
is to be prepared by a UVA State lrcensed Frafessivna1 Engineer, and irnplexnented
throughout the duration of canstruGtivn. The TESC plan is tv be prepared using
best management practices (BMP's) currently accepted within the Civil
Engineering professian. The TESC glan rs to snclude, as a minimum, a gradirig
plan, lacation and details of silt cvntrol structures, and a street cleaning pragram.
Runoff from exposed areas must be filtered priar to discharging intv a detcntivn
pond, 20$ 5vvale, ar iniltration facility. 1he TESC plari i5 to be included in Che
road and drainage plans. The applicant' s Engineer is to submit fihe TESC plan
and supporting calculations t4 thr: City of Spokane Valley for review, and sfiall
receive aeceptance as part of the plan review prQCess priar to site disturbance.
The TESC major structures (such as silt pands, Silt trap5) are tv be inStalled priar
to ather site work and the TESC measures are to he implemented an maintained
thrnup,hvut the durativn of constructivn, incluaing house cvnstruction. -
20. Any new drainage system oukside of the pubIic right-of-way will neikher be
maintained nrar aperated by City of Spokane ValZey forces. Prior to plan
acceptance b}+ the City Engineer, the 5pvnsor shall prvvide a mechanisrrk,
acceptable tv the City Engineer, for the perpetual maintenance of the starmwater
drarnage systern. Thrs mechanism shall alsa provide far the funding of routine
maintenance and the replacetnent of the various campvnents of the drainage
system at the end of the service life of the respective campanents, and any other
improvements that may be Iegally required in the future. An (7peratian and
Main#enance Manual for the stvrmwater management system shall be prepared by
the Spansar's Engineer, and included in the project dacuments submitted fio the '
City Engineer for acceptance, a1Qng rvith a discussion of the design life of the
variflus companents, a calculated annual cost for repair and a rnaintenance, and a
calculated replacement cost. A Hvrneov►mer's Associatian nr vther entity that is
acceptable to the City of Spvkane Va11ey must be prapased and accepted by the '
City Engineer for perpetual maintenance.
21.The City Engirieer has determined that this proJect pexadt is exem,pt under
the Phase I I)evelvpment kegulations - Seetipn TV (B) (2b). Future time
extension wiH reQuire review by the City of Spokane VaHey Public Warks '
Ile,partrnent for concurrency with the Spokane Valley Calnprehensive Plan.
df yau have any further questians, please cantact me at 688-0174.
cc: LDeparrment of Public Works - I7evetapment Project Fi1e
11707 E. Sprague • Suite 106 • Spnkane Valley, ►+IN~A •992Q6 ■(5U9) 921-1040 • Fax (509) 921-1008
~
STDRMWATER DRAINA,GE CAC_,CULATIQIVS
r~
FOR
~ RIDGEMfJNT ESTATES NC}. 4 - 7TH ADIJTTIC)N
NW 1I4 of Sec. 25, T. 25 N., R. 44 E W M
~ Spokane Gounty, Washingtvn
March 9, 2001
- +r; ~
o;{'ii•.L • - : i
`n•r~Al,.r".rt+E-'Z' i'•~'°' ...»:•~It'
Prepared by:
• a:
Simpson Engineers, Inc.
North 909 Argvnne Road
r
5pokane, Washington 99212;;. 0
~
The design impravements shown ux this set of plans conform tn ~y
! the applicabie e&tiQns of the 5pokane Caunty swdards for ~ cP
roa.d and sewer cpnstauction and Spokane County guidelines far
stormwater management. A21 desigrc devnatsans have been
; aPprovr,d by the Spokane Cauritv Engmeer I approve thesa
plans for canstruction 9967~j
LEKRRES 711710.1
1. Siumary
11. Stormwater Drainage Calcuiatians fQr Basins Al, A.2, B, C, and D
- of Ridgemont Estates No. 4- 7th Addition
111. Attachments:
. ~ IZaadway Surfacing Design
~ Srails Map arid Tahles
Rrdgemunt Estates Nv. 4- 4~' Add.; C)ffsite drainage map and calculafions
* Ridgemont Estates Pd4. 4-- g`g'Add.; Drainage calculafions
P 1PrajecLs 1i3714l13714-208.dcac
!
Stornnwater Drainage Repart, Ridgemont Estates Nurnber 4-7th Addition
i
I
1. SUMMARY_ .
- The deveiopment is divided intfl four (4) basins; A, B, C, and D. See I7rainage Map fvr Ridgemvnt Estates Na.
4-7th A.dditinn Each basin is cvmpnsed of ttivo subareas; I} grass lawns, and 2) impervious roofs, driVeways,
and a5phal# paved Stt'eet5. St[7rmwatEr flaWS averland aCrosS rDDfs, grass lavyms, and driveways and into grass
drainage pands. Stcrrmwater from asphalt streets flows along #he curb gutters and into the grass drainage ponds
Yhipi~gh Cll1`b 4p8I1ing5.
The grass percotation areas (drainage gonds) were calculated tv hold the first 112" of rainfaff runaff over the
asplzalt street areas.
Figure 2, page 5-3, of the "Cuidelines fvr 5tormwater Management", by Spokane Counry Engineers, was used
fvr rainfall in#ensity and durativn accurring at a 10-year storm frequency.
The Ratianal and Bvwsfing Methods were used to calcrulate the peak stormwater runoff for each bas'rn, and the
type and number of drywells needed foF each basin based on the storage cagacity of the pond.
In accvrdance with "Sod Survey, Spokane County, WashingEon°", 1968, the soiI is categorized as
C'mxB, Gan-ison vcery geavelly loam, sixtilar to Gartisvn gravelTy lvam, except that the
surface layer is very gravelly
` Carnments_ .
For Ridgemant Estates No. 4- 4d' AddFtion, an earth berm was eonstructed alang the west plat line (east RIW
of Pianeer 5treet). This was done tv prevent offsite n.inaff fram flpwing onta R E Na. 4- 4~' Additian (See
affsite drainage map (Basin W) done in 1992 for R.E Nsa.4 - 4`h Additian ) The offsite runofF is ponded
hehind the exisEing earth berm. With the addition of Ridgemtant Estates Na. 4- 7'h Additivn, a portian of the
earth laerm wiil be relacated tn the sauth pIat line of R.E. No. 4- 7~' Additivn ta prevent affsite runaff fram
flQwing onto R.E. No 4- 7~` Additivn.
_ Originally, Aioneer Street was going ta extend from Sta. 11+58, but Grace Harvest Church purchased thas
' property south of R.E. Na. 4-7~Additivn, and it appears that Pioneer Street will raat be extendea. Grace
Harvest Church uAll he responsible fvr starmwater cansiderations svuth of R,E.1'3a. 4- 7,' Addition.
T'he pand in Basin Ewas originally cvnstructed to callect iunoff fram 20t` Avenue (Basin A) of R.E. Na. 4-
: 5`b Addition. This pvnd will now be erilarged to accommodate a smafl amount of additianai runafF fram
- Pioneer Street.
_i
I TT. STORMWATER DRATNAGE CALCUZATIONS:
Basin A-1 _
i Area
Total = 94,506 sq ft. - 2.170 acre '
, PaVement = 21 st Court = Sta. 5+05 tp 7+95 = 6,895 sq+ ft. - 0.1 583 acre
_ Driveways =4 112 driveways at 1,040 sq. ft.Ihouse = 4,500 sq ft. - 0 1033 acre
Raafs = S 1l2 roofs at 2,000 sq. ft.lhouse ~ 17,000 sq. ft - 0.3903 acre
Irriperviaus = 6,895 sq R. + 4,500 sq. ft, + 17,000 sq ft = 28,395 sq. ft - 0 6519 acre
Grass Lawns = 94,506 sq ffi - 28,395 sq ft. z-- 66,111 sq. ft - 15177 acre
StaraLye Repuirsd:
a} "20$" Storage Required ={6,$95 sq. ft. }(112"=12 an per ft.) = 287 cu ft.
b) Bvwstring = 441 cu. ft. + 2 I]oub1e Barrel Ilrywell, Type S(2.4 cfs out)
StoraRe Prowided-
Pvnd, 6'r deep, (24')(30')(0.5') +(20+30+2Q+30)(4 375 ft.2) W 337 cu. ft > 287
Pvnd, 8" deep; (20')(30')(0-67') + (20+30+20+30)(0.67 ft = 469 cU. ~ > 441
' 34, ,
20° 20°
i 2 oo ft =1
_ 1. 1 5 ft. _i
6i I
V~
- 3•1 6" = 0,5 ft. 8" =.0.67 ft. /3.1
,
(1o2)(1 5')40.5°y = 0.375 sq ft (1/2)(2 00')(0 67°) = 0 67 sq ft.
, QET5NTION BASIN DESIGN RAYIONAt FORMLlLA HYDROLC7GY 8@C]Wu7RlkG METNC3D
DRAINAr3E 6ASIN AhCAtYS35 Tar ZO YEAR, STOR1I EVENT
Cmte SP.iM Rreject h4ame' Rrclgerr:ani Estafes 94 - 7th Adddion
Jpb Nc 13714 Rro)ec4 Lqoaon. 29st Court 0nd Pinrteer
Cavgner J Young C7ramags Basin Hame Basin Ai
C1isk prr P Projects drscrualc 13714 Qrainilge 6aWn [JeBCnp€bn Dra5+te
i Filename 1379401 xls °208" Prisidsng Area Name. "Al"
- Far RidgemQrot Pstates Panding Area La:aticui. Norfh side of 21st Caurt
Faoint af Crincentraticm L.ow Pi., 7+95, tfl.
SUBAREAS TIME C7F C7DNCEN`fRA31C]N (Te). mSrsutas
DL-scriptinn Acres C A'C pvsrlsnd Flaw Chanrel Flow
h"vrvl[WS '20$'A+eas 2Wmenf A_ L2 = 255
Rsphalt Fa+uemenS 0.158 0.90 0142 Ct= 0.15 F1 = 0172
Drireways 0.103 0_9[] 0093 L7(A) = 245 Z2 = 36
Grasr Lor+n 1.598 015 0228 N(A) _ 04 8= [i
RovFs a 390 17.9EY 0 359 5(A) = 0.454 n= 0016
Tc (A) = 5 54 x= 0027
OtherAreas d = 01199
5enrtrent S.
Li(B) _ 0 Tc (oh.) 1,34
PE(B) = 0 7G(A+g) ~ 5.64
5(8) = D Tc total 697
Ta (B) = 0.0 Intensdy = 2 81
Totai Basln Area, acres = 2170
, CompQSite i2unoff CoefriefeM = 036
Cambined (Area ' Fdunoff Coefficterit) ~ 0614 Q{estimaYed @ d} = 2.29 c f.s
F'mre of Concentratian z 617 minutes
"2W DRHI[VAGE PRRAME°fERS
Impannaus "208" Area m fi,BS5 sq ft. PEAK DiSCHAR6E, 10 TEAR STORIH
"708" VdurnePwded = 337 cu. ft. at 5" deplh
Starm 5tomge Pmvrded = 469 cu. ft. at 8" depth Q= C' t' A= 2.29 G.F.S.
BO1hISTFtIMG CALCL6LATIpNS
Oi #2 63 04 05 96 87 NLlA7BER ersd 7YPE aT DRYWELLS PROPO.SE4
Time T1me Irrtemsity Q dev 11 irr V out Storap
Inertnnt Encrmnt, (Y Sirgla-8arrel (5pokane 4:ounty Type A)
{min } {sec.} (nJhr) (cft) {o+ R-) Lcu fl.] (cu ft ) 2 Gou61e-13arre1 (Spekane Ca[trtty Type B)
(Mlo1 IACWJ tOLE In1 ms-m
697 41944 2 81 2.29 1283 835.87 446 C3utfttw Prcwided: 2 c.f.s
5 300 318 2.59 1iDd1 600 441
iD 600 2 24 1.82 1354 1200 954
t5 300 9.77 1.44 15H2 1800 -298
20 1Zw 145 1.18 15$5 2400 -815
! I 2$ 15EH1 1 21 0.99 1618 3(#10 -1382 "2fl8' TFtEATMEh(T Vf3LL1ME
~ 30 18W 144 4." 1645 3600 -1955
, 315 2104 481 0.74 1662 4200 -2538 Requved G PA. ponding valums.
40 2400 0 82 0.57 765$ 4$00 -3102 Impemasfs'20B' Rrea x 112' = 287 eau ft
45 270(} 074 0.60 1713 540O -38$7 +rolurreprovided at 8" depth = 337 css ft.
' 50 30t10 0 68 0.55 1740 6000 -4260 OK1
~ 55 33DO 064 4.52 1794 5W0 -48M
60 36ff0 0 61 050 1859 7200 -5341
65 396O 0.60 049 1975 78DQ •6825
76 4200 058 0.47 2059 84DO -E349
~ 75 4506 0.56 045 2777 9040 -6883 STDRM STORAGE VQtUME
84 4806 0,53 0 43 7133 9660 -7467
- 85 5900 0,52 0 42 2220 70200 -7980 RAaomum starags required = 449 cU 3t
90 5406 0.50 041 2257 10800 -&543 volume prrnnded et depth = 463 eu ft,
- ~ 95 5700 0 49 040 2331 11400 -9069 OK!
~ 100 6000 048 039 2401 12000 -9599
Sfmpsarr FngPn$ers, lne. 90 NwYh Rrgonne RaaB, Spatans, WR 99212 (504) 926-9322
I
i
lYTw1ffi- BasNk1
_i
~
- 11 STQRMfWA,TER BRAiNAGE CALCLTLATI[]NS • (continued)
i Basin A-1 (cvntinued)
- Curb Uoenine on Cantinuous Grade, Sta 7+82, 7+95, and 8+68, 18' left, 21' Cvurt
a= 2 in. = 0,17 ft. Flowline depression at apening
y= 018 S ft Depth of fiow in nflrmal gutt,er
Q = 1.98 CfS De51g1 d15GhaTge
' Qa1La = a 12 From Fig 16(a), Page 6-39 "Spvkane Caunty Giaidelines far
- 5tQrrrnwater Management"
L = Qf(Qa/La) _ 1.98/0 ia = 16.50 ft.
Construct Spakane Caunty Type-1 Curb Inlets, 3@ 5.5' each = 16 5 ft, 8 in deep
~
' DEPTH OF FLCJW - y - FEE7~~~
~
❑I 02 03 Da 0S 4s ❑9 .ta 1.2 3 < 5 8.T 9,s 10
~ - •;~-I i k , ~ 10
~ ~ ~ ~ j~- ~ ~ ~ 1 ~ ~ ~ ~ • ~ ~
-
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i R e
.07
DkSCHARGE FER FOOT QF ; o~ 6
LEfdGTH t7F GURB aPERfING ' 10 -4
IfVLETS WHEN INTERCEP7ING
1070°/a OF GUTTER FLOW
.4
- (a) PARTtAL 3WTERCEPT1f3N 3 Qa
, RkTIO FdR 1NLETS OF _r._t._r _4--..-j-
LENGTii i.ESS THAN La
L
% I
00
~V
~
i
OS .06 .68 .10 x •3 4 -s •5 B Ld
~ - ~ L/Lo
CAPACITY flF CURB OPENING EhILETS
ON GONTIIVUOUS GRADE
6-39 FGG6JRE 16
I
BaSIIk A-Z
Arec'i
- Tota1= 52,644 sq. ft. - 1 21 acre
I Pavernent =2Ist Cvurt = 5ta 7+95 to 9+82 =(18T)(18') = 3,356 sq ft
- Pianeer 5t = Sta. ] 6+78 to 19+44 = (266')(18') = 4,758 sq ft.
Fillet (20')~20') -(114)(~)(20)2 = 86 sa ft
8,240 sq. ft. - 0. 1$92 acre
_ Curb a.nd Sidewaik = (220' + 3I.42')(6.5') = 1,634 sq. ft, ti0.037S acre
Dnweways = Z diiweways at 1,000 sq. ft.lhause a2,000 sq, ft. - 0.0459 acre
Roofs = 4 roof"s at 2,000 sq. ft.Ifivuse = 8,040 sq. ft. - 0.1$37 acre
i
Impervious = 8,240 + 7,634 + 2,000 + 8,000 = 19,874 aq. ft. - 0.4562 acre
Grass I.,awns = 52,644 sq. ft - 19,874 sq R. = 32,77{] sq ft. - 0.7523 acre
Storaee Reauired:
~
' a} "208" 5torage Ftequired =(8,24d + 1,634 sq, ft. )(1l2" =12 in. per ft)= 411 cu. ft.
b) Bowstring = 369 cu. ft. + 1 Double Barrel I]rywell, Type B {1.0 cfs out}
Stvraue Pravideci:
~ Pond, 6" deeP; L(30')(20') + (9)(14) + (112)(9)(6)](0 5')
+(2D+3p+1 1+14+39)(0 375 ft 2) = 419 cu. ft, a 411
Fond, s°° deep; [(30')(20') + (9)(14) + (112)(9)(6)](067')
+ (20+30+11+ia+39)(o.s7 sq ft.) = 580 cu ft. > 369
341 If
~
20° za'
~w
3°'
2 00 ft.
- 1.5 ft
3: T f" = 0.5 ft. S" ~0.57 ft 3:1
(1f2)(1.5')(0 5°) = 0.375 sq ft (1/2)(100°)(0.67°) W 0.67 sy. ft
Basin A-2
Area
T~tal = 52,644 sq ft - 1.21 acre
' Pavenent = 21st Court = Sta 7+95 t❑ 9+82 =(187')(18') = 3,365 sq ft
V Pioneer St =Sta 16+78 t0 19+44 =(266')(18') = 4,788 sq ft.
Fiitet (ao')(20y) - (1i4)(7c)(20)2 _ $6 50 ft.
8,240 sq. ft. - 0.1892 acre
Curh and Sidewalk = (220' + 3I 42')(b.5') = 1,634 sq ft. - 0.0375 acre
' Driveways = 2 drivevvays at 1,000 sq ft./hvuse = 2,004 sq ft. - 0.0459 acre
Roofs = 4 roofs at 2,000 sy. ft.lhause ~ 8,040 sq, ft. - 0.1837 acre ;
Impervious = 8,240 + 1,634 + 2,400 + 8,000 = 19,874 sq ft. - 0.4562 acre
C"~rass Lawns = 52,644 sq. ft. -19,874 sq ft. = 32,770 sq. ft- 0.7523 acre
5torne Re4uired:
~
a) "208" Stora$e Required = (8,244 + 1,634 sq ft. )(112'F - 12 in+ per ft } = 411 ca ft
b) Bowvstring = 369 eu ft. + 1Douhle Barrel Drywell, Type B (1.O cfs aut)
Storaae Arovided:
' PQnd, s" aeep, f(30')(20') + (9)(14) + (1i2){9}(6)1(4.5')
, + (20+30+11+i4+39)(0.37s ft.2) _ 419 cu ft > 411
, pond7 g" deepa I(30')(20') + (9)(14) + (1l2)(9)(6)1(0.e7')
+ (20+30+1 F+1a+39)(o.~7 sq ft.) = 590 cu. ft. > 369
39' .
3Qr
20° za, r
30°
2.00 ft
YL f
1.5 ft
~
r
, 3\1 5" - 0.5 ft = 067 ft. 3 1
(1t2)(1 5')(0 s°) _ 0 375 sq ft (1f2)(100')(0 67°) = 0.67 sq. ft
E ;
[7ETENTlQN BASIM I]ESIGN RAI7QHAL FQRKltLILA HYDFidLO3Y & SCfiN5TR1Nd ME THC}i]
DRAJP9AGE fiRSiM ANALY5k5 fpr 10 YEAR STORM EVENT
' Date 816100 Praject IVsme Ridgemont Estates #4 • 7th Rdddion
- Joh N0 13714 Projecf Locatinn 21st Court and Pioneer
, oesRgner J Young Rraiaage Biasin Name: Basin R7
Drsk Dir P Arojects.drsmealc 13714 Qrainage Basin Qescnptinn. Onsrte
Fileriame 13714a2)ds `208" Pufufing Afea A!alrte "AY'°
For Ridgemorrt Estates Pansiing Aree Lwafion. North sstl8 04 21st Cour3
Paint oi` Canoenlraliort Sow P! , 9+45, Lit
SUBRREAS 71ME OF CONCEtdTF7ATION (Tc), mirsutas
pascriatran Acres c A`G Overland Flow Clrarsnel Ffonr
' lmnerwtw8'268"Ar9as• SeomerrtA. L2= 225
Asphalt Pavecnant fl.189 090 0170 Ct . Q'[5 Z7 = 0172
- Gurh ersd 5adewalk 0 438 0.90 0.434 ti(A) a a Z2 = 36
Driveways 0 U48 090 0 447 N(A) = 04 B= 0
Roofs 6 984 0.9f1 0155 S(A) = 0.054 n= 0016
Grass Lawn 0152 015 0113 Tc (A) = 000 s= 045
d = 0157
nThBr amas s~ia mer+r e.
L4(@) = 0 Tc (ch) 7 gU
N(B) = Q Fc{A+8} 040
3(B) = 0 Ta taial 5.00
Te (8) _ ❑ 4 [Mensrty = 318
Totai Basrn Pusa, acres = 1209
~ Compasde Runoff Coefficserd ~ 0 43
Cam6ined [Araa " Runoff Coeti"toierrt] = 0 524 ❑(estimated @ d) = 166 c f.s
Tirrte of Cancentretrcm = 5 f1p mmu[es
`2f?8° QRWNAGE PAIZAMEFERS
Impervious "20$° Rrea = 9,874 sq. 31 PEAFC DfSCHAl2GE, 16 YEAR STC]RN]
_ "2p8" Volurr€e Provided R 419 cu ft, at fi" depth
Storm Siarage Provided c 5&U cu ft af 8" dspth A= C' I"A a 9.65 G.F.S.
BQWSTR[N[3 CALCULRT10N5
#1 #2 #3 #4 #5 96 97 NLIMBER ard 7YPE of DRYWE6LS PRaPOSEp
Time Time InPensrty Q der. V in V Qul 5larage
lncrmrA lncrmnt. 0 Single-Barral (Spoksne Ccsurdy TyFxs A)
(min) [sec) (inlhr) {cfs} (cu ft) {rai R } (cu. ft.) 1 Dnublo-8arrel (3pnkasie Caurity Type B)
[91'60) SA'CWl Iwd!'C21 t#5-06S
500 300 OD 318 1 66 669 3D100 369 Dutflr}w Pmnded 1 c f e_
5 30Q 318 166 669 300 369
' la Ga 224 117 $23 soa aza
is 90D , r7 093 928 900 zs
za 1200 145 o.7s sas 1200 -ziz
25 isno 121 063 1015 asco -ass "zns"TREaTnneNr v€sLuLIE
I 30 1800 104 o.sa 1036 IBao asa
35 210D 0.91 0.48 1049 2100 -9051 i2aquired G.PA. ponding vNuma,
40 2404 0 82 ❑-03 1014 2400 -1326 ]mpas+nous "208' Area x SlY' = 411 cu, fl.
, 45 270d 074 4.39 1085 270p -1615 vQluma provided at G depth C 419 cu R
, 50 30M 068 42$ 1904 3000 -1aw OK±
55 3300 064 034 9190 3300 -2960
60 36DD 0.61 032 1182 38flt7 -2478
65 3900 060 031 1257 39t10 -2643
70 4200 0 58 030 1306 4200 -2894
75 4500 0 56 029 1349 4500 -3151 STC3RM STQRAGE VOLIlAAE
_ so 4800 053 O.~~ 1360 aeao .3440
85 5100 052 027 1416 5100 •3saa nnmGmum sto~~ ~equired = 369 cu. n
, 90 5400, 0.50 0.25 1440 5400 -3960 Volume provided at 8° depth = 580 cu ft
~85 5700 0.49 0 26 1488 57a1 4212 rJKI
' 100 6000 048 025 7533 6U6a -4467
, Slmpson EnglneeFs, !nc 9M Adurb ArgunnE Road, 5pokane, VYR 99242 (504} S,ZB-?3s2
i
~
unux,~- esw~u
i_ ~
, H S'I'QRMWATER DRAINAGE CALCT.ILATIONS • (cvntinued)
Basin A-Z
Curb f)oenina at Law P❑int. Sta 9+46, left, 21 " Court
' h= 8 in = 4 57 ft. Tota1 height of apening
_ H=[] 156 ft Dep#h of water at entrarace
~ Q= 0 98 cfs Total peak rate offlaw
I
- Q = 3 0$7(L)(H)"" for H,Ih < 1, 0.1 5610.67 = U 23 c l
L= Q- (3 087)(H)312 = 0.98 =(3 487)(0 156)312 = 5 15 ft.
Construct Curb C]gening; 6ft. wide, 8 in deep
~ Curb Oneniniz on Continuaus Grade, Sta 17+21, left, Pioneer St.
a= 2 in. 0 ] 7ft. Flawline depression at opening
i y= 0.09 ft. Depth of flow in nQrmal gu'tter
' Q= 0.38 cfs Design discharge _
QaILa =0.06 Fram Fig 16(a), page 5-39 "Spokane Courny Uuidelines for
Starmwater Management„
L= Qf(QafLa) = 0 3810.06 = 6.3 ft
Construct Curb Opening, 8 ft. v►ride, g in deep
IJse 2 Spakane County Type-2 Gtzt`b inlets; 2@ 4' ; 8'
,
II STORMWATER DRAINAGE CAT.CULATION5 (continued.)
Basin Ae2
+Curb Ovenin2 at Law Point, Sta. 9+46, left, Z i" Caurt
h= S in. _0.57 ft. Total height of opening
H= 0 156 ft. Depth of water at entrance
; Q=0.9S cfs `I'ota1 peak rate of flow
Q _ 3 0$7(L)l~3"2 foI' H/h C 1, 0 1 56/0.67 _ 0.23 C I
L _ Q = (3.087)(H)32 - 0.98 - (3.087)(0 156)3f2 a 5 15 ft.
Cvnstruct Curb Qpening; 6 ft wide, 8 in. deep
Curb Openina on Continuous Grade. Sta 17+21, 1eft, Picsneer St.
a_2in = 4. r 7 ft. Flowfine depression at ogening
y~ 0.49 ft. T]epth af flaw in narmal gutter
Q _ 0 38 cf5 De5ig[1 d15Gh8I'ge
QaIGa = 0.05 Frorn F'ig 16(a), Page 6-39 "Spakane CawYty Gjaidelines for
Storrnwater M-aaagement"
L = QI(QaILa) = 0.38l0.05 - 6.3 ft
Construct Curb (3pening, 8$. wide, 8 in. deep
LTse 2Spokane County Type-Z Curb Znlets; 2@ 4' = 8'
fdATkONRL FDRMl3LR FfYORUL~'aY
DfAINAGE BA51N ANALY515 for 10 1`EAR 57aRM EVENT
Date• 518W P'anJert Hame• Ridgemorii Estates Nb 4 3th add
Dmgn kwm Projact Nurnher 13714
Disx r-Re PXpraJectzA13714s13'114e+ )b 5de Location NW 114, 5 25, T. 25 N, R 44 E W M
Basin Nartte. "A2 (cur6)' Sasm UewnpGan North sida of 215t Cnurt
Peinf af Concentraflan, tavv Pt . 9+45.7, Lft•
Sl]BAR'EAS: fntansitY•Quratian fvr 10-year 5tartn Event
aescriptian Acrea C A'C
7tma Time lntensrty
fncrmnY. 6rscrmnt
Asphali Pavemerrt 0095 4 90 0095 (min ) (see ) (in.fhr)
Qrrvewsys ❑ [746 090 b D41 (41'60)
Grass Lawn 0.536 n 15 0.0m 6.17 37022 2 96
Roofs 0.138 0,90 0124 5 300 318
10 600 2 24
- 15 9W 1.77
20 12QE1 145
25 1500 1.21
30 18M 7.04
To#af Basin Area, aeres n 0.814 35 2100 0.81
Compasfta Runaff Caefficisnt ~ 0.407 AO 24t1Q D.82
Carttb'reed {Area ' Runoff Caeffictent} = 0 339 45 2700 074
50 30w tl 68
55 3300 064
so 36W 061
"f[NfE OF GDNCEHFfZ4TIfJN (minutes). 85 39D0 0 SO
, 70 42{10 0 58
Tc (avedend ffaw) Tc (gedfar fTov) 75 45DA 056
80 4800 053
Ct= 0 15 L2 = 104 85 510f1 0 52
Z1 ~ 0,172 90 5407 050
L1(A) = 244 Z2 = 36 95 5700 0 49
N(A) = 0.4 Bo d 1[]a 6=1 048
~ S(A) = 0.{]62 n= 0.018
s = 0.018
Tc (A) = 5 40 d= 0156
L1 {B} _ 0 Yc (gut ) 0 77
, N(8) a 0 Tc:(A+B)' 5.40
S(B) = i] Ta total 617
intensitY - 296 PEAK bISCFiRRC3E, 10 'YEAR STQRM:
Tc (B) _ 0.0 Holding 371
GlaC"I"AC 0.88 C.F.S.
4 (estimated @ d) ~ 0.58 ct s
i T'imo ai Canesr}tration = 617 minutes
Ida3e. The othar 0.3947 acres ara flr,nnnng overland strafght Errta t}ee pond and into curb inlet on Pianeer 5t.
(0 2630 acras are Raving overland and 0 9317 acres rni Pierrteer Sf.)
~~aan)
i
RATIONAL FORMUi.A HYDROLGIGY
~ ❑Ft-A#NAGE BASIN ANALY515 far 10 YEAFt STDRM EVEtdT
Oate st&m[l Praject IVame, Rcdgernarit Estates No 4 7kh add.
, pesrgn' kWm Praject Number 13714
fmk File Pi(sfpJeCtsl137i4113714a2-CUrhbp.xEs Site Loe'atian. NW 114, 5 25, T. 25 N, R 44 E 1+V M.
' Basm Name "A2 {cur#a}" Basin Descnptinn West side of Pioneer 5t
Raint af Con[;etjtration Curb Opertmg, 17+21, Lt, Picsneer Rd
- SUBAREAB. Intensity-Duratiarr for 10-mr 5torm Event
Descriptton Acres C A'G
Time Time Intensityy
Incrennt Incmirrt
- , AspFtalt Pavernent 0.()94 0 9D 0085 (min J (see) {in ft)
, CvFb and Sklenralk O.038 0 90 0034 {41 'm
_ Dnveways 0 0OO 0.90 0ODD 5 DO 300.00 318
Ranfs Q QDC] 090 0.000 5 300 31a
Grdss Lawn 0000 ❑ 15 0000 10 EOLI 2.24
15 9DD i 77
20 1200 145
25 7500 1.21
30 1800 9 04
Total Basirs Area, acres = 0.132 35 2100 0.91
CamPosrte Rurmff CoeffrAerrt = 0.900 ' 40 2400 0.82
C.ombined (Area ` Runoff CoeN'scien!) = 0119 45 7700 0.74
50 34OO 0.68
55 3300 Q 64
60 3600 D.61
TIME OF CQNCEryTRATIDtJ (rrElnutes), ~ 39M 0.60
70 4200 0.58
Fe (avedand Row) Tc (gvtfer nvw) 75 4500 0.56
80 480t? 0 53
Ct = 015 L2 ~ 715 85 5100 052
Z1 ~ 0.172 so 5400 4.50
L1 {A) = U 22 = 36 95 5700 D 49
N(A) = 0.4 IB = Q 700 MM 048
- s(,a) = 0054 n ~ 0016
S - O.Ds
To(A)= 000 d = o 09
Lti (a) = a rc (gun-) 1 45
N(B) = 0 Ta(A+$) 0.00
S(8) = 0 Tc total 500
IrtiensltY' 318 PEAIC DISCHARCE, 10 YEAi 5TQRM:
Tc (8) = 00 Haldirsg 802
Q= C' I' A= 03$ C.F.S.
0 (es#imated @d) = 038 c f s
7ime af Cvracentratian P 500 minutes
- Note The other 1 0770 acres are flournng averland intv porsd ar flavnrtg into curti inket an 21 st Caurt
(g 2630 acres are tlowing ovedand and 0 914 acres are flcwinng qn 21 st Court)
~zc~s
I
I
DEPTH OF LQW - y - FEET
ai .az 03 aa as .os oe .fv z d .s s r s g 10
,7~'I ~ ; ~ 9 ~ I I 1 ! I I/~I r.❑
.T ; -j'
~
'
0°^~ I{^~ .a
~ Qa
f
~A, ~
~ La
I I I
i I ~ r~
I I ` ~ p °
.I
.ofi
~
~ ~ ~ ~I • ~
04
f k
~
10
' (a ) oIscHaRGE PER Foor OF C/
~ ~F-NGTFC OF CL1RB dPENENG fi
INLETS WHEN INTERCEP'6fNG
IDQ°/Q OF GUTTER FL4JW
, a
(b) PARTfAL iNTERGEP7ION .s Q°
RATID FQR [NLETS OF LEWGTH LE55 THAN L,a
i
i;
o~
, I I r ~ I •.Ifl
- 05 Os vs .1[] .a .3 a .s s, 8 10
"q LrLfl
CAPAClTY OF CURB OP£IVING INLE75
pN CDNTINlJOUS GRADE
' ' 6-39 FIGURE 16
U. STC3RMWATEk DRArNAGE GALCULATTQNS - (continued)
j- .
B85IC1 B
Total AIea
Total = 32'624 sq. LL - 0 7489 acre
Pavement = 20'h A,,venue. & Pianeer Rd. = 10,972 sq ft. - 0 2519 acre
Curb and Sidewalk = (398' + 31 42' + 15')(6.5') = 2,887 sq f~ - 0 0663 acre
i7riveways = 5driveways at 1,004 sq ft.Ifi❑use = 5,040 sq ft. - D.1 I48 acre
Roofs = 0 roofs at 2,000 sq ft.lhvuse =0 sq. ft.
Impeririaus = 10,972 + 2,889 + 5,400 + 0= 18,861 sq. ft. - 0.4330 acre
- Grass Lawns = 32,624 sq, R, - 18,861 sq, ft =13,763 sq R- D 3164 acre
i
~
Storage Reauired:
' a) "208" Storage Required -(I 0, 972 + 2,889 sq. ft. )(1 f2" =12 in, per ft. ) = 5 78 cu, ft
b} Bcawstring = SO7 cu ft + 1 Single Barrel TJrywell, Type A (0.3 cfs out)
Taial Storage Provided
Fond, 6" deep; (20)(48)(0.5') + (12)($)(0g')+ (13 73 ft 2 )f0.5'}
(48+20+48+8+12+12 57')(4.375 fk.2) = 590 cu+ ft> 578
Pond, 8°° deeP, (20)(4$)(0 67a) + (12)(8)(0.67°) + (13.73 ft .2 )(0.67')
{48+20+48+8+12+x 2.57')(o 67 ft.Z) _ 816 Cu. ft. > 507
48' 205 20__-
48° ~ l
g
2.00 ft
i_ 1.5 ft. i ! .
n
3. 1 U" = 0 5ft. O" = 0.67 1L. 3+1
(112)(1.5')(0.5') = 0 375 sy.ft. (112)(2 00')(0.67') = 0 67 sq- ft.
pE°fE1YTIL']N BASiN i3F.51GH. RATIC]NAt FDRMULA H'ADR[3LOGY & BOWSTRING METHC7p
pRAfR1AS'sE B,45tN ANALYSIS f6r 10 YERR 53QRM E1IEIVT
Dafe 618f0o PrQjec1 Name Ridgemani E&tales 94 - 7th AdditiQn
Job Rio 13774 Pres}act Location 21at Caurt an[f Pierzeer
Designer J Youag pramage Basm Afame basin B+ Runoft irom Ridgemunt Estales NoA-6!h Additissn
Qisk Dr P PrQjees dra3ncale 13714 Dfainage Ba&in Descnption C3nslte
' Filename 137146 )ds '208'F'anding Area Name I.W.
Far Ridgemani Fstates Fpndmg Prea Locatian 20th Rvenue
Paint nf Cortcerdratinn Sfa 74+08, nght
SUBAREAS TIME OF CQNGENTRATIQh1 (7c), minutes
Dascnption Acres C R"C ClverEaral Ffaww Charrnal Flavv
rmDervraus'2aa'Areas- seorrianra L2= 355
Asphalt Pavement 0.252 0 9€S 4227 Ct = 0.15 Z1 = 0.172
Curh srul S3dewalk 0066 09f1 0.06D L1(A) = 0 Z2 = 36
onveways 0.116 090 0103 N(A) = 04 s~ o
Grass Lawn e_319 015 0047 S(A) = 001 n~ 4.016
Tc(A) = 600 s = 0015
d = 0184
OfherRreas. 2wmeet B-
L9 (8) = 0 Tc {r,h ~ 2.60
, N(B) = 0 Tc(A+8) 000
S(B) = 0 Tc tatal 500
Tc (8) _ ❑ 0 Intensity = 318
Tatal Baszn Area, acres ~ 0749
CnmposRe Rurioff Coefficiertt = 058
Cambined (Area " i2unoR Coeftient) = 0.437 ❑(estimmted @ tE) = 9 39 c f.s
T€me of Gorscentratioa a 5.00 mimttes
'208' DRAINAGE PARAMETERS
Itnpampus '3{1$° Area = 73.861 sg. fl PEN( DISCHARGE. 101'EAR STQFtM
"2[}8" Llolume Prurided = 5$[1 csi. fl aE 6' depth
Slarm Starage Pravided = 816 au fl, at B°dapth G= C`!' A= 138 G.F.S.
BQYUSTRING CAtiCULAFIONS
#'f #3 03 #d 95 96 01 NLlRriBER end TYPE a4 QR1MfELLS PRQRC7.SEp
Tims Time In{'ensdy Qdav. V m V ou1 Storegs
Incrmnt Inarmnt. 1 Smgle-Barre1 (5pokane Coursiy Type A)
- (min ) (sec ) (inlhr) [cis] (csa. ft.) [cu R ) (cu fi.) 0 134uhlo-Bsrsel (SpDkane Caunty Type 8)
[1tf~160) fAIC'N31 (nfflPa) (ASmGI
5.00 309.D0 318 1.39 559 0000 469 Dutflvrv Pmvided: 0.3 c.Ts.
5 3p0 318 139 559 90 469
10 506 2.24 0,98 667 1s0 507
t5 900 177 0,77 77s 270 50
_ 20 1200 1.45 063 825 360 465
25 15M 121 0.53 8+37 450 397 "208" TRFr4TR3IENT VOLLfME
36 1800 1.04 045 855 Shca 325
35 210Q 0.91 040 878 630 246 RequTred G.p.R, ponding tialume.
-00 2400 082 0.36 897 720 177 lmpennQus "208° Araa x 112" = 578 eu R
45 2700 Q 74 032 9DB 810 96 volums pmvided aR 6° depth = 59D cu. ft
5[f 3000 0 68 030 822 9m 22 OK1
~ 55 3300 064 028 952 936 •38
6D 36W 4 61 0.27 987 1ON -93
55 3m 010 026 705d 1170 -12a
70 42[]0 058 025 1051 5260 -169
75 4500 0.56 0.24 1528 1350 -224 S7pRM STS]RAC3E VpLIlME
80 4800 0.53 0.23 1136 1440 -304
$5 5100 0.52 0.23 71$2 1S3U -348 Mammum storage requfred = 507 cu R
9(} 54410 0.50 0.22 1202 4820 -418 ualume pravided at 8' deplh = 816 eu, ft.
95 5700 0.49 0.21 1243 1710 -467 CsKf
iDp 6000 0.48 0.21 1280 18m -620
, Simpsnn Erglneers,lnc. 909 Hiarth Argonne Raad, Spakane~ W,4 89212 (50) 926-7372
i
~a7i~eta~- emta
~
' Ii. STORMWATER DRAINAGE CAT..CIILLATIQNS: {contuaued}
Basia $ (cvntinued)
Curb flveniniz at Low Faint, Sta 14+08, right, 2Wh Avenue
h = $ m. = 0.67 ft Tatal height vf apsning
H=0 184 ft. Depth af vaater at entrance
Q= 1.39 cfs Total peak rate vf flraw
~
Q= 3087(1,)(H)"7 for Hlh <1, a. l8410.67= 0.27 <I .
L= Q-(3 087)"" = 1.39 -(3 0$7)(0. 184)" - 5 70 ft.
~i
Cvnstruct Curb Opening; 8 ft wide, 8 in deep
"Use 2 Spaka.ue County Type-2 Curb Inlets, 2 la 4' = 8'
;i
E
~
~ IT S`I'ORMWATER DR.AIlNAGE GALCULATIC)N5: (r,aniinued)
Basin C
Area
~ Tatal = 10,459 sq, ft - 0,231 acre
Pavement = pioneer St = Sta I5+27 to 19+30 ='7,444 sq. ft~ 0.171 acre
DriVevvays = 0 driveways at 1,000 sq. ft.lhouse = 0 sq. ft--O.00D acre
_ Impervious = Cl + 7,444 sq ft. - 0. 171 acre
GrasS Lawtts = 10,059 sq. ft. - 7,444 5q. ft. = 2,615 sq. ft. - 0.060 acre
Stnraee Reauired:
a) "208" Storage Required _(7,444 sq. ft 112" -12 in per ft.} = 310 cu, ft.
b) Bowstring =I 18 cu. ft. + 1 5ingle Barrel Drywell, Type A(a.3 cfs out)
'I`otai Storaee Prornided:
A
Pand, s°° deep; (9)(60){0. s'} +(g+64+g+64){0 375 ft.) = 322 cu fL > 3 10
Pond, 8" deep, (9)(60)(0.67') +[9+60+9+6C})(0 67 ft.) = 454 cu. ft> 1 18
6f]'
9' 9'
f b'
2.00 f't.
„ -
1, i 5 ft j
r
3•1 6"=0 5ft. 8"=067 ft. /3.1
A (1/2)(1.5°)(a 5') = 0,375 sq ft (1/2)(2.00°)(0.67°) = 0 67 sq. ft.
i
DE7ENTIC]N FfASlN bE51GN RATIdNAL FORM9LR MYDRC7LOGY 8 8C7W5TRING TsETSif30
QRWMAGE B4SIhf ANALVSiS for 70 YF-AR 5?eRI4E EVENT
Crate. SP31{%1 Pvajact Name RidgeRtant Estates #4 - 7th Additwn
Jnh hlo_ 13714 Pruject Lccattnn. 21&Y Court and Pioneer
E7e.scgner J Young Qrainage Basin Name Etesln C
Qisk 4ir P Praje= draincafe 13754 Dreinage Basin Qescription []nsfte
Fflename 13314CAs "ZQB" Aonding Area Name. •,C,.
For Ridgemwni Esfates Randing Am Locafian. East side of Pioneer
Pmrrt of Crncerr"tioro: Sta.15+66, Rt.
54l$AREAS TIME QF [014CEf+iTRATIQN fTc1, mirsutes
Descn0116n Pcpres C A'C Overlartd Fiow Channel Fbw
lmaervkrua `208°Areas- nlA: L2 = 372
Rsphsft Pavesnerd 4171 0.90 8.954 Ct = 415 Z1 ~ 0.172
0 ODD om n non Li{A) = 10 72= 36
Gress kem 0.067 0.15 aDDs N(A) c 04 s= o
5(A] _ 007 n = 0.076
PffWAreas. "fe (A) = 1 37 s = 0.045
d = 0 404
Seament 8,
L1(B) = d Te;ch j 230
N(8) = 0 TcfA+B? ° 9 37
S(~ = iD Tc 1otaf 500
Tc (B) 0.0 IrRenstY' 318
TotaI Bamn Araa, acres = 0231
Cornposite RursofPCkeilficierst= 071
ComhYned {Area ` RunafrCoeffieferr3} ~ 0163 L3 {esbmated @ d} _ 0.52 c Is
- T4me of ConcerRraSran = 5 00 minutes
°208' BRAdNRGE PARPMETERS
fmpeMaus '208' Rrea = 7,444 sq. ft REAIt DiSGHARGE, 10 YF-AR STORM
"2W Volums Prxsvided = 322 cu. ft a1 6" deplh
Slarm Siorege Prcnvided = 454 cu+ ft af 8" deplh R= C' Az 0.62 C.F.3
BOWSTRING CALC1dWT1ON5
t1 02 #i 04 05 #6 #7 NllMBER and TYRE af DFZY►NELI-S PRDPDSED
T[me 7ime IrAerrsily C! dev V in 1f cnr! Starege
lrtcnnrrt. {rcrmrst. 1 5ingle-4arrel (5pokarre C.aunty Type A)
, {min.) {sec.} {nJhr] (cfs) i- It1 (+u Ift) 11) 0 Doubse~ (spolmne Coianty Tyqa B)
0+,60a (A*cV3] tnn vz (054sl
S.GO 300 OD 318 0 52 2m 9000 t18 C)ullieiw Prtnrsde&- 0.3 c.f.s
b 30If 3.18 0.52 2438 90 `i 18
10 600 2.24 0.36 255 9841 76
, 15 900 g ra 0.29 289 270 19
20 1209 1.46 024 3GO 360 -52
25 1600 9.21 0.20 346 450 •134 "208"TREATMEhIT VQLUM1+~
~ 30 78w 1.69 017 322 5+E0 -218
~ 35 2100 091 815 328 630 -304 RequiredGPA pDndietgualutrte:
~ 90 2400 0.82 013 331 72EF -386 Irnpervicus'208" Area x 1r2" = 310 cu. T1
45 27DD 074 iT 12 338 810 472 vduma pravideda1 lrdspfh c 322 cu ft
- I 50 3000 0.&8 0.91 344 900 S55 O(?
55 334a 064 D 10 355 9w -635
~ 60 3600 om 010 388 1080 -712
65 3900 66D 040 391 9170 -773
76 4200 0.58 009 4DS 726[] -854
~ 75 45W 056 009 420 7350 JM StORM STORAGE YaLLMlE
' 80 480a 0.53 0.09 423 1440 .1017
85 r'J100 1} $2 008 441 9630 -1089 MwlfiltlrYl SIRI'8p fB({Ulf¢d G 118 EII. f{.
90 5400 050 008 448 9520 -1172 volum$ Mvided at 8" depdh = 454 cu fl.
95 5700 0.49 0[!8 463 1710 -1247 C3K!
100 6DDO 0 48 0.08 477 980 -1323
5[mpsna Fnglneers. drrc. 904 North Argonne Rosd Spekane; WA 89212 f~} 926-1322
i areaeaa - uam c
II. STORMWA'Z`ER I]RAINAGE CALGL1LATIONS (continued)
Basin C
Curb Onenine at Law Point, StaE. l 5+66, 1$' right, pianeer St
h= 8 in. = 0.67 ft. Tvtal height nfopening
H= 0,104 ft. Depth vf water at entrance
Q= 0 52 cfs Tatal pealc rate of flvw
,
Q= 3(}87(L)(H)'n for HIh c 1, 0. ] 4AI0 67 =0 15 r I
L = Q ? (3 087)~312 = a sa - (3.087)(0 104P _ 5 02 ft
Canstruct Curb Opening; 5ft wids, 8 in. deep
i!
IT. ~~ORMwATE~ DRAINAGE CAr..CuL,ATIaNs: (conxinued)
Basin Q Area
Tvta1= 91,064 sq. ft. - 2095 acre
Pauement = 21st Cflurt =Sta. 5+05 to 9+82 =10,352.5 sq. ft.
pioneer St = Sta. 15+27 to 16+78 = 2.718 so ft.
13,070.5 sq, ft. - 0.3001 acre
Curb an~ ~~dewalk _ (113° + 3 1.42')(6.5'} _ 93 9 sq. ft. - 0.0216 acre
Driveways =6.5 driveways at 1,000 sq+ ft Ihmuse = 6,500 sq+ ft. - 0.1492 acre
Rvafs = 5.5 roofs at 2,0(}0 sq, ft.lt►ause = 13,000 sq+ ft, - 0.2984 acre
Lnperviflus = 13,074.5 + 939 + 6,504 + 13,000 = 33,509 S sq ft. - 0.7693 acre
Grass Lawns = 91,054 sq ft - 33,509.5 sq, & = 57,554.5 sq. ft - 13213 acre
Storaee Reouired:
a) "2178" StQrage Re.quired _(13,070.5 + 939)(1l2"=12 in per ft.) = 584 cu. ft
b) Bawskring = 769 cu, ft. + 1Double Barrel Drywell, Type B
+ 1 5irigle Barrei Dryrweil, Type A (1.3 cfs aut)
Storaize fteouired:
Fond, 6"deep; (12)(a7)(0s') + (12+sr+i2+9r)(0.3a5 ft.2) _ 623 cu+ ft. > 584
pond, s"deep, (i2){s1}{o 67'} + {12+g1+1 2+9] )(0.67 ft.2) _ 869 cu ft > 769
°
91,
12' PQlld 12'
91'
~ 2.~0 ft _i
I_ 'f
- ~ ~ J ft
li
I
I.1
3-1 6"=(]5ft. 8"=0.67ft. 3:1
- (1/2)(1 s')(a s') = 0 375 sq.ft. (1f2)(2.00°)(0.67°) _ 0 67 sq. ft.
DE"fENTiDN 8AS1N QESIGN RATIGNRL FORMULFI MYf7ROLOGY 8. BGVNSTRING AAETHOQ
❑RAlNAGE BA$IN ANALY518 tar 10 YERR STORM EVEAff
Data ea100 Project IJame Rrdgemant Estates #4 -?th Rddiban
Jab No 13714 PfajeCt lxcatipn 215E Court artd PlpneBf
Designer J Y6urg Qrairsege Basin Name• Besin [T
Qmk Dir P'lproX~cts.draincaic 13714 [2raiff2ge Basin DescripUon. OnSite
Filsname 13774pAs "2D8" Panding Araa hfam8. "1y.
fic+r Ridgemont Estates Pondang Arga Lcaca3ion: West sEde af Pinneer
Paim of Cartcentratmn. ft 15+66, LR
SIIBAREAa TlME []F CsC]NCENTRAT1ON (fc?, rrsinutes
V?ssenpiion Aeres C A'C Overland Flova Channel Flow
Imoervieuis '208"Araas Seoment A. L2 = 575
Rspttalt Pavemsrd 0300 0.90 flr^.3'0 Ct = 0.75 Z1 ~ 0,172
Curh and Sidewalk 0.022 03D 0443 L1 (A) = 906 Z2 = 36
offveways a aas oM 0134 N(A) = 03 a= m
Rwis 0298 0.90 0.269 5(A) = 00054 n a 0016
Grass 1.321 0 95 0198 7c (A) = 5.53 5 = 00242
d ¢ p.2a7
Ofh&r Areas• Saerraant 6:
i Lf(F3) = 0 Yc (ch.) 313
hf(6) = 0 Tc(A}B) ° 5.53
S(B) = o ro Wi 865
Fc (B) = 00 Irrtensity= 2 49
Total Bas;n Hfea, acres ~ 2091
Gompostte Runoft C,defl'wient = 043
Ccnnbined (Araa ' Runoff CosffFcient) ~ 0 891 Q{estimsfed @ d} C 222 0s
7ime of Cnncestatiare = 8.66 rninutes
'208' l3RAiNAGE PARAME"TERS
Impernous `r 68" Area = 14,090 sq R FEAK DfSCHARGS. 90 YEAR STORM
-208" Vvlume Pra~'sded = 623 cu ii at B" deplh
Stnrm Slamoo Pravrded m 80 cu ft. sY 8" dePEh L7 = C' 7'A= Z22 C.F'.&.
Bt3V4f5TRING CALCULA31QN5
#`k #2 43 #4 #S #6 #7 NLIMSER and TYPE of OfiYWELl.B PR❑ROSEp
Time Tima Irnersaly 0 dav 1rA irr V osi! SEasOga
Incrmnt Inesmnt. i 5ingle-garre9 [Spwkane C<wrty TM A]
(mm ) (sec ) fm.mrJ {ds} (cu. (cu. ft.) i+x ft.) 7 Douhle-Barrel (5pakane caunly T'ype e)
f#1`601 fA'C`mS fam V2i [AM
866 519.52 2.43 2 22 1545 fiT5.37 87G DutFlcmr'Provided: 13 c f,s.
5 300 398 2.83 1138 390 748
14 600 2.24 9.95 1599 780 789
15 90D 1.77 1.58 1697 1178 527
20 120fS 7A5 729 77-78 9560 248
25 1506 1.21 108 1861 1950 -143 "208" TRER7MIEN"f VOLk1ME
30 98m 1.04 093 1831 2340 -5D9
35 27DD 1791 4.$1 1845 2730 -M E?equEred G.P.A. porsding volume
44 2400 0.82 073 182 3120 •1238 fmpervmus'2D8" Rrea x 112` = 58A eu R
45 2700 4 74 066 1896 3510 -lfiid valume pnnvtftd at fi depth m 523 cu R,
50 30D6 068 061 1924 3900 -1976 OK9
55 330D nsa 0.57 1982 4290 -2308
60 35M 061 o.sa 2052 4680 -2628
65 39W 060 053 2178 5070 -2892 70 4200 pss 0.52 2261 546f3 -3199
75 45M 0 56 0.50 2332 5850 -3518 STOF1M SFORAGE Vt]LL4ME
ea 4800 0.53 0.47 2349 6240 •3891
- 85 5100 0.52 0.46 2444 6630 -4186 Mewrrfum atarag$ reqwred c 759 cu ft
90 5400 050 045 2483 AOFO -4537 valuma prctvided at 8" depfh = 50 cu fl
ss srDD 049 0.44 2564 7410 4sas vKi
90D fimo 048 0.43 2640 78(10 -.~'i18d
St+rlpsan Eng3nsem, lr+c. 909 NnrM Argonne fiosd, Spakene, !NR 99212 (508) 8Nr1322
15714d~da Bald,o
II STC7kMWA'IER DRAINAGE CALCULATIQN s. (cantxnued)
Basin D
Curb Oveninp, aC Law Foint, Sta. 15+66, 18' left, Pianeer St.
h= 8 ira. = 0.57 ft. Total height of opening
H= 0.20 Depth af water at entrance
Q=2.22 cFs Total peak rate of flaw
Q = 3.087P(H)V2 for 14/h < 1, a 20l0.67 = a 30 < 1
L = Q = (3.087)(H)" = 2.22 = (3.087)(4 20)32 - 8.0 ft
Construct Curb Clpening; $ ft, vvide, 8 in deep
- Use 2 Spvkane County Type-2 Curb Tnnlets; 2 @ 4' = 8'
II. ROA.DWAY SURFACING DESIGN:
The Spokane County Alternative Pavement Design (Interim) for Local Access Pavement Structures was used for
design of the roadway surfacing.
From the table, Local Access Pavement Structures, the following information is needed to determine the required
surfacing depths.
1) The type of street must be local access.
2) Soil type (as classified by the United Soil Classification System)
3) The average daily traffic, ADT
Street Tvpe: Pioneer Street, and 21st Court are designated as local access (residential).
Soil Tvpe:
In accordance with "Soil Survey, Spokane County, Washington" by United States Department of Agriculture,
Soil Conservation Service, 1968, the soil found at the site is categorized as:
GmB, Garrison very gravelly loam, similar to Ganison gravelly loam, except that the
surface ]ayer is very gravelly.
Test holes were dug by Simpson Engineers, Inc. at the centerline intersection of Pioneer and 21' Court at the
Station 16+78 for Pioneer Road. Another test hole was dug at the center of the cul-de-sac of 21' Court at the
Station 5+50. The test holes were dug to a depth of approximately 12 inches below subgrade. The soil samples
were tested by Strata Geotechnical Engineering. A sieve analysis was performed by Strata on soil samples #1,
and #2. From the testing, the soil type was found to be a Brown Silty Gravel, GM per Unified Soil Classification
System. (See sieve analysis results included.)
Averne Dailv Traffic, ADT:
Pioneer Road will have average daily traffic counts of less than 200. 21S` Court will be cul-de-sac with an
average daily traffic count of less than 200.
Design:
From the table, 2 inches of asphalt concrete pavement over 6 inches of crushed surfacino,
is required for Pioneer Road.
From the table, 2 inches of asphalt concrete pavement over 6 inches of crushed surfacing
is planned for 21' Court.
~
GEc7YECNNICAL EHG]NEERING d FAATERIALS TE57{R1G
~
1620 M Mamer Rd 9unlaing C Sutte 100, 9ookene WA 99216
509891-1904 ! Fax50 391 -2012 1 e-rnailSVaESokeieacam
- 1Yay 24, 1779
Cllen$ No. SBAENG
Prvject No. 5990026-1
Reference No.: SL05201
Mr. Kevin McNTuTkin
~ Simpsan Engineers, Tnc.
N. 949 Argonne Roa.d .
~ Spo1ane, WQ 99212
i
Praject: Ridgemant Estates No. 4 7hAdditian -
Date Received: iVlay 12,1999
Date Tested: 1Viay 13, 1999
Description: Brvwn Sflty C7kAVEL
]Gocatian: 21' Cowwrt Cul-De-Sac, Sample '&1
~ SWFVE SIZF, ~ °"e PASSIlNG SPECS ~
- 3.0" ~ 100 ` i 1;/~" ~ 59 ~ ~ .
~ 1.0" ~ 49 ~ .
'I'dr ~ 46 ~
ya" ~ 38 6 -
31$" ~ 35
No.4 ~ 27 ~ - ~
~
~ Nv.8 ~ 20
No.16 ~ 14 p
No. 30 I 12 ~
~
- ~ No. 50 ~ 11
~
- N4. 100 I 10
No.200 ~ 8.3 ~
S incerely,
STRATA, INC.
Rick Woodworth
' Testing Services Manager
PJW cm
io„Hp • WAS}ili:uiGN OnEGOrr • rlrOraIKG • r.aGNTANR • i.tTaH - aEVAOA
~
~
s r R a i a
GEO'CECIiNICAC EiJGftJEEAFNG a renrERinis resriNG
~
1620 N Mamer Rd Buifcfing G 5uite SpQ Sookane, Wp o9216
503891-19D4 1 Fau -909 841 -2012 I e-mad straESakCieacam
1Viay 24, 1999
- CIient No. SAIdENG
Froject No. 99941026-1
Reference Nv,: SL05201
Mr. Kevin McMulkm
Simgson Engineers, Inc.
N. 909 Argcrnne Roaci
Spokane, 17VA 99212
Yroject: Ridgemont Estates No. 4 7th Addition
Date Received: May 12.1999
Date Tested: May 13, 1999
Descripiian: Brarvn Sflty CrRAVEL with Colabies
LQcatian; lntersectivn vfPianeer Road aad 2V Caurt, 5amp1e #2
_ _SIEVF, sIzE 9lp pAssIvG f SPEcs ~
5.021 100 ~ 4.011 ss i I
3.0" ~ . _ $6 ~
~ W" 76 ~
j ~
62
~ 3f497 ;4 ~
~ i~2" 44
3i8" I 3s ~
. No.4 I 29 ~
rsra. s ~ 23 j ~
No. 16 20
~ No. 30 ~ 19 ~
~ No. so ~ 18
~
No. 100 ~ 17
~ I 1
rro, 200 ~ 14.9 - sinceYeiy, STRATA, 1NC.
►~cr 4 )e V -4 /z'.~7-da
Riek Woadworrth
Testing 5ervices Mamger
ruw-cm
IDAi-[(1 SYAS;'€NG`I{1M • O!iEGOFd • :r_^•.~'VLAiONTANA • IJTn;-7 • N.VADA
LOCAL ACCESS P"AVEMENT STRUCTURES
AVERAGE D►4iLY TRAFFiC
SCJIL TYPE co - 2Qfl) 200-500 6(}0 t
G1~ ~F ` f4~ 2II/611 . 211[~,+11 211'L}G!1
1 C]
, GP 2"76„ 2111711 277
i
_ Gi~rr R R~ iF~~11 2!Ir~"fl! 2II`8II
r r
1
GC 2,pfT,e 2„1811 3„76„
~j'r L.~7i1 r7ii
5 V V 211f6'} Grlri!! IF
SP 211!f619 2IffJ"Jlf Lnfl'8f1
I
f f61r
s1Y1 G~~~~~ 2"1$rr 3eI
. ~ sC Pavement Design
, ML 311/611 3r,/8,$ 4111611
GL Pavement Design
OL 41117„ 5171 5r'1811
I'V1H Pavemen# aesign
QH Pavement Design
PT Pauement Design
1) Svil type is classifed by the lJnified Soi[ C1assificafiivn Sysfem.
2} Required thicisness is g:ven as inches of asphalt cvncrete pavement oasr
inches Df crushed sur#acmg.
SP'OKAN~~ ~OUNTY ALTEF'rNATE PA'I►rEMENT DESIGhI
.
(IN~ERIM)
J -
Try a depttr af 1. 2' 4-4. i7r7we3ls - P're:cas t evncrete dsy_
saells, as shawu esn Caunty standard
2l3 1/2 d,rawings, may be used to rerain stvr-,
~ V=1.486 R S Rm Area dra.inage ia soi].s w3th a ve*-y rapid per_
~ Wee`ed perlmeter IIeabilitv. Ty-pes A and B Drywe-? Is in
the folIvw=ing sails may be designed to
- 3.28 s.€. iafiltrare a rate az flaw o€ 0.3 c*s and
2 +?(I.22+2.42) 7.36 ft. ? . G cfs respective3.y: ,
Bong A~.arbIe
~ R - .7I7 Bon.aar Phoebe
. ~Ga~a~sa~~ 5or~.zigdale
aiz
V- 1.486 (.717) ~I3 (.02) 11Z= 5.61 rps The iacatians a£ ehese sail types are
•03 shown in the 5oi]. Camservatioa Service
Sai? Suz7ey far SROkaae Couazy. The
Q- VA = 5.61 fps x 5. ZS sf = 29. 6cfs drainage repart sha.Ii inc].ude acopy of
, the 5CS map wirh the subdivisioa plot:.ed
- 30 crs . , d - Z' ~hereaa. The Couuty Fagineer s~~l re-
, quise tlae deveZaper t4 provide a sieve
So3ve De: Try 1•3' ana-17sis and soil rype test fxoia a soi? s
~ }.~,barato~ a~cceptable to the Caunry En-
- Q - / g (b + ; Dc)3 Dc gineer if there is a quescion regarding
b+2.: Dc Che abave soil tqpes.
312 In rural areas, as darined ia 5paicane
Q=432.2 (2+2x3.3)3 Y, 1.3 = 3[}.9 efs Couufiy Raad Standards, onen gravel dry_
' (2+2..U.3) weIls map be gertnittea ia lieu a* the
prec~.st cnacrete drpwe?Is.
3Q.9 ~fs ~ 3[7 c~s . . ~d~ ' ~..3'
Preca.st cancrete dryw~is prapased f9r
~c 5 Ila, flas~ is su~ez~rit~ca~,. use in ❑ther soiIs than those shor.rm
above aad a1.I age~c gravel drgra~.].s saall
' Sf nc~ ti~e ~low is supePc~itiea3, care be designed accarding to percoIation
shou1.d be taken to pravide a praper de-- rates determined by a fie? d tes t ccn-
sign at paimmts where hQrizantal andlo; farming to the Man,ssal- of 5epcir Gank
vertiCal ali gTime.nc c'-iarcge- practice. A GawaLy inspectvr shali he
pr~eseat during a11 perco3,atia~ tescs. 9
A frea bea~c~ a~ .3~d shQU~d 6e app~~,~Q percfl3,atian tess ca3eul-atien sheet
1] - .3U ~C 1.2 = I.56' sigraed ~d seaTed by a regiscered c: ~ril
engineer sha1l be subm.itted. Ttze per-
V - 5.6 fps > maximsm a? lowabie. colatian rate shaIl be equa3 t4 ar
greater than 72 ?:nches per hour° to be
Pzvvi.de rip rap. (Refer to 5ection accegtable for dr7we12 canstructian.
~
4.5.) 4-4.2 Starage Facilities - DetenL{Qn
, I agorage £acilir-ies map be used to
; 4--4 17eteratioalRecentf crn Systems - The =egulate £Iow rates. An ave::~~ow
'pe-ak rate af ruua-off frnm an existiag type storage syseem chic£a regsl.ates the
site shall nct be increased due to the rate d£ outflav sha,il be used. See
peapnseti develapmeat fnr a given desigr. gigures 4-3, 4-4r 4-5, and 4-6 for
storm. "[herefare, a 'rerentianlde~en- stcggeszed details. Landscapeci facil-
tion faciZity cn-sire w.i.1i be required. ities eueh as parks, playfie3ds, teunis
courts, etc. are recvmmended for
Daee: 4/4184
4-I5
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SCALE:
~ ~ GR A CE HAR VEST'FELLOWSHl P ~ ~ A _ ~ ~
r
~
DFFSi~ - g~Sl~ " W ~
~ D ?Arvi !tC-~E F:P-D*'l. W ~s-r-_ QF _KIDGEMof,~ O57P~1=-"S Ma, 4 -ATM Ar7I «v r•..)
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DESCRSPTIt31V'-' F:IDGEMCINT~E5TA7ES NO. ~4"- 4TH ADD TTIC3N.~~._ ' . _ , . ° -
. . ~ T . . , ~ ' . - x a 'I„a' •j ~ '.~+,r ' ~
suBaREA ~ ~ - 11.2 AcRES - SuBAREa 1 RtJNL7FF ° C€.]RVE• fdUMBER 71
TOTAL RREA~ = 11,2 fwCFiES CQMFQS I TE GURVE NC..3i"iBER = 71 . CIO .
EiaS I ra Ir~PUT mAra ~ _ . . - .
~ - RAIhlFAL.L = 2.6 I NCl;ES 3~ 50 `(aa4 Stap_m
~ HYI'JRAi iL I C LENGTN = 600 FEET
, . : GJATERSHED SLQFE = 4 F'Ei;GEN7 - . L
~ TF:AVEL T I ME _ 0 HOURS
CraLCULATiE7 ViLUES
4. c=)S
SNCHE^
G-~ _ . 54
I LAG _ .14 NOURS
Tc = , 73 HOuRS
DLUr'i E = " 1, 119. ~a C o F . ~ s'~ ~ a 'a r.~ G
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5, , 1 C~-7d ;`Z ;c°5
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i 1, 20 j q
1 . 7'~ ?~i P 5F ~1.~~ ~~t r4a~ f`''~Q \ ~~M 6'r4 ~ i r~C, 1{ ~v F~.
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12 .Zo ^.67 ~ ~
I.~'~~ 5
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' 12. 40 'S
12. 5l) 1, i 6~
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12.70 .35 -TZr4 F-r
1 2, BO .74
12. 9ca .69
131e 00 .65
_
1' . ? .54
17.50 . 47
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Dr^~sTE I3ESiGhiER = W MCI"44UL~''IhJ BASIN "A„
FRLJECT 3VAME _ RT DGEMC3NT "JTH ADD IT I ON
DESCRIPTIO1+J =S70RMWATER IJRA I f+1AGE
SUBAREA 1 = . Z4 AGREa SLJbAREA 9. RIJNQFF COGFF ICI EN3 =
'SiJBiF:ER _,24 rwGFiES SLtPAFiEA 3=iUIVQFF CC3EFF IG I ENT = .15
TOTAL A-iEA = . vB ACF:ES Cf3MFOSI TE ~`iUNi7FF COEFFI C I ECwT = .539655172414
Cki1EFil..r^!lVIS FLG7W 'JALUES
i Ct = .15
L 35
N _ .4
S - .01 °
I
CHAIVNEL FLOW VALUE5
L = ~5 ca
i
_ Zi ~ 4(u)
I i2 1 I`2
f I N O1 ta
B = k~
S 0 2. 1
' TD _ .1492
COMFUTEp VALUE a '
; DLlF; - 5.45
~ 1 1tx = 7',08
010 ~ ~.05-~
Qn
i
C+A.~g f]PENiN G NT LDW F t]~N i i 5Tjti. -t D~d+ I-e4G HT) "~Cil 171 14VS N LlS.
'H E IG K`i ❑ F C q~ z- o?ENi t4G
' D•I4~~.r L7EPTH OF '"~IA~~~ V1 p~
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DATE 20192 I7ESI CNER = K W MGMi,lLKI N 4BASIN "A$»
PROJECT IVA#''iE = RI DGEMONT aTH ADD iT ION
I3ESCFi IPT i[3N =STOF'.MWATE-~'i I3FtAINi GE
' t t Intensi ty Odev. Gi n VaLat Storage
- 4mrn, 3 (sec. ) [ar,. ihr. ) Lc.f.s. l Leu. ft. 3 (cu. ft. ) {cu. ffi. 3
5.0 1:1 ric~ :3. 1 s 1.09 4:7.7 90 347
J.'£} 72 7 ysll$ 1r05 461 ~e 7, 63
1[Z . 0 600 2.24 .77 545 I SO 3 6 5
15. 0 900 1.77 .61 6 12 270 ~4 2'
I C) 1. 45 .50 6 5 0 :;6n 29C~
' ~7 i=v3~: 1.21 . 4 1 667 450 2' 17
1i_P 1.04 . ?v 630 t540 14c)
, r i a ~y 2100 .91 . ::11 688 67,=1 40.0 21 4 C1Cf s 8r'. . 704 720, - 1t~7
45. C) 2 7C) 0 .74 , ~5 711 s10 -99
i 50.e=) .;O(_)() .66 .23 724 900 -176
_ =Oo .64 .22 7Intl 7 990 -2 4.1
60. 0 7600 .61 .21 774 1 r3SC) =06 -
65.0 wg[:~O R100 . yfa SIb 1 1 7-54
70. [;Y 4 2-0 0 . 58 . 21 0 855 IZ60 `°405
75.0 4500 .56 . 1 3 875 1 L-1 5 0 -4 7 5
90. o 4$00 .57 .18 8?0 14~0
85. C1 5100 .52 . 18 916 15:;0 -612
9l 1. [.IJ`TL+t+ .50 .17 942 S6LV -6I6
- 95.0 .Fr700 .49 .17 974 1710 ~77.6
1 CIr]. 0 6()Q0 .48 .16 1 c:r.= 1900 -797
i
THE MRXIML3M S"f'ORAGE IS 7fa4.7?(a27$:~91 CU, FT.
~ The time ❑f concentrat3on is 5.44843 minLttQS.
- The Undevel.oped flow out is .1 c,f.s.
TEPJ YEAR ST.~'.,Rf'I GALC
r~ .
RE~E~V~
& imf~son Engin~t¢rs, Inc.
FFB o
CIVIL ENGINEERS AND LAND SURVEYORS O 3
N. 909 Argonne Road • Spokane, WA 99212 SPOvcvvFCoU 2~~0
(509) 926-1322 • Fax: 926-1323 Nn'ENG~NEER
TO: e~ ~alrrv. ~ SQb~aKe Cau►h'+~ ~l~q~Vleer~
.f `
SUBJECT: jZic~~e~awt ~s~a"tes No. 4 -ITN A481'+1ot~
DATE: ~~z I2oo-c~ 1~ave i~cl~de.d ~or .,owN re.v~ew
~ •
~wo se4s of ike S~re.4..t akd aYqIKq~Q plqhr .
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- 31 O~.. e~ r► v~.'~ s e+ o'f 8~'? x 11 N 10t f1 a ti s
(for Lo~s 1, 2, 3, 4 aKd 14)
4~ p~e ~zc,~ioti AVe.e.r+tetif 6e-Fweeh fke spoh.ror
~
5~ Ke~es-1' -~or Q~ia hDevi a.'~~oh
Su6u++r~#g,l C4►eck Ust
~
\ 5 iv~.c.er ely~ .
. ,
~eyiwl MCMalkIk
.
Signed
~
~
~
~
6ampson EngireersJ Inc.
CI11IL EWGINEERS AR►fD LAND SURVEYORa
N. 909 Argonne Rvad • Spokane, WA 99212
(509) 926-1322 • Fax; 926-1323
~
~
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TO: ~ c4 Pez r m.E P r,
-11
SUBJECT: -R,, & 4- -Lb 7 [A cl d .
oATE_ sfq 8'1n I ~
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c ~ ~ ~ ~ ~ ~ ~ 3 ~
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r71gned
~ imnson Engireers,1nc. RECEIVED
CIVIL ENGlNEERS ANQ LAND SURVEYOR^ MAY 2 2 2001
N. 909 Argonne RQad • Spvkane, WA 99212 SpommE ,~NTy FNctiNEER
(509) 925-1322 • Fax: 926-1323
To: L-4 P61ft-,~.j P F- SpO'CFVIP C01 ~~y^rrs
SUBJECT: 144 E.r+j"r_ r
T3ATE: 3r (2,.ZA ~
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~
~ impson Engineers, Inc. "t,
cIVIL ENGiNEEAS A~~ ~AND SuRvEVORS
N. 909 Arganne Raed • Spokane, WA 99212
(509) 926-1 322 • Fax: 92~'r1323 ~7
~
~ n +C,'~ . lEt) a rA etcr s
TC): [ra r r14
SUBJECT: 4 -7 Llh Actd-
DATE: S
a~0-a~o 4:7
&"r- P, t iq ?-A Ad~~ ~1 / / /
C.v 4 7- ~ j~..07Lk 1 r c~ ~ ~l G. ~ 6r~yr ~r n,~' Yl `'l,..w' ~.a~ r~ ~ s+
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5lg ned
RPRT24-2001 15=07
Memorardum
Date: Apra] 24, 2041
To: Chuck Simpson, P.E. .
Fram; Spokaise Caurjty Engir►eer's Offic
Deve9opment Sez-vices (Ed Farry; E,
Subjecc: P1423F - Nsemington #k4, 7tb Add[irion
Svz7s lovestiga►tioas
Chuck:
The sa€Is Qnfr3rrsiabon yau provided in your Aprri 20th memp will be adequate at tIaiS point in time.
please be sure during construcfion to verify ihat the soilsat the drywelts iocations da canform to
ihe GarriSCfn ciassiTcatian
Thanks
Ed
:
~Daie J qa~~p
Past•it° Fax IVote 7671 v l.r yFrom ~ G•
CaIOePCC~ r ico ~ ~0 `-Vj~ ,
~Phcnetl f~_~
Ptsane A
E Fdk ti
Fass 0 IWs~_
~ ~i~~
' TOTAL P.07.
APR-24-2001 15:14 9S~ P.01
J
MemoCandum ~
roz~ ~
Date: Msy 3, 2001 To: Chuck Simpson, P.E. {via faac}
Frnm; Spakane County Engineer - C)eveloprnent Servires {Eci Parry, P.E.}
5nbjecr: PY423F - Ridgemont #4, 7`h Addition
20'h Aveuue Sidewalk
Chuck:
I visited the site yesterday to refresh my memQry of the field csanditians. My visit can~firmed
your plan (the project drainage map) showing that there is at least ane driveway alang 2e Avenue
that has entry landscaping at the drivewaylcurb junction, as vvell as seueral existing traffic signs. The
plans will need to show the neuv locativns far the items that end up in the new sidewalk.
The plans indicate that there is a mailbox cluster at the boundary of lot 4& lnt 5 of
Tt.idgemant #4, 6" Addition. The sidewalk should meander arvund the maiibox Gluster to pravide as
near ta a G' elear path as may Ye obtained vAthin the rightaof way.
Lot 1 has a suabdivision entry sign that may be impacted by the sidewalklpond vvork. It wvuid
be helpful if ihis cvtald be snawn on the plans as wefl.
I discussed the praprased sidewalk connectivn detail with 3im Haiaies, the Assistant Cflunty
Engineer. The access rarnp shvuld ccrnf'vrm ta either L7esign "A" or Design "B" (at your aption) of
Standard Detail A-5. We realize that this will led d.v surne additional remcrvaT and replacement of the
exis#ing sidewalk and curb at this lvcatian. As we noted irrY the design deviafian waivuag the sidevvallc
along 2 1' Caurt, the C6unty will credit the cQSt of this cQmectian against the arnvunt awed for the
5ullivan Road frantage imprvvements.
Please eall me at 477-3600 if there are questions. It rnay te leneficial for us to ineet on the site and
review the proposal. My earliest apen time to maet would be the rnorning ofN1ay 8, 2001.
Ed -
~ ¢ 01~~
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TI3TAL P.02
ChueEc Simgsoo' P.E.
PI 423F - Ridgemvnt Nv.4, 7th dddifian
2°4 Submittal .
Apri I 5,2001
Page z of 2 _
Ttems needeti:
•A Submittal Checklist was nat received with this submittal. A blank Submtttal Checklist is enclased.
Plans
■ 20'b Avenue: A Uesign Deviation to delete sidewalk on 21' CourT (dated Feb. 3, 2000) was approved,
provided that sidewalk was provided nn 20 'h Aaenue. Sidewalk pEans fnr 2U* Avenue should be sncluded with
the next suhmittal
■ Pioneer Rgad
a The drainage attems indicate that a co rete crass-gutCer should be prc~rride~l at the intersectiQrt ~sviTh
20`~ Ar~enue ~
o Verticsl curaes appear Esa be taa short fQr the terrain and desigrr spee .A Design De►+iatian shauld be
suhmitted ta justify3hese elements
o/rading catch paints shnuld be indicated, and caardinated wi~slape an drainage easements
vXype B curb should be provided tca candey tlows on this slope
a Has the proposed stop sign at the intersection rvith 24`h e4r+enue 6een coordinated with tlhe County7
Traffl c Engineer7 Stop signs are rypically required only at intersectirsns with Arteria l-mted rosds
■ Z 1 Court
~
o~e curb profle on the cul-de-sac was nvt r~eived with tltis su'~mittal ~~~`~i~-
Calculations
+ Drainage CaYcu9seians:
o Soi[s si the drywell 2~~iQns shnuld be verified eith~' theough horings or through test pits. We
recammend that this be aceomplished prior to Ette nexk suhmittal. As a minimum, it cauld be
accomplished concurrent wrth the sewer Eonstructinn.
• Pavement besign: Tesi pits shrsuld extend to 5' helow subgrade eEe►+ation {per Teclvnica9 Reference B}. This
can be accomp2isheti during cvnstructimn
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~S'~ FOR ~3F~GN D~1~~JN RE
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FEB n 3 2DO0
DATE &MEME=M;NTY EnfGiN~~R
'MA.0 NAMM ~ ~ t~ ra e.~r k' e~ c~n ~ Z i ~ r ~ CRP.'RM # -
;ii,vmE QF PLAT i~-cl w hn 5~ os f e s N o 44.r ~ 7kJ~, cd } f i c sn ~~f 1$-Z3F
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IIi 'kG COI'fniiiONS: PRC3PfJSE) IMF~OVEMLN7S; RC}AD W?'IH he. , 3-6 f { , - .
ROAD SThtFACE . • ~ ~ he- 2!AG?, ~ "cz5-rc
AVG. I7AILY TRAPFC ~ ,Cj --ZD o
F?C]iE= ~ESC=O1v ~iv~e~t~ Stree~' Zl~~ C.ourt' vaill be Czhstrwc~~~ ~o
v~~~~de to l~ i~~s ti~, ~~~~~~~~3 ~:~bdtkl5i~h+.
F.°.OPL•7Sr..t`7'. DFSi ONDF'JTArIL7N ~ C.olnS~i'wtC~ ~roct4WA45- ►M~vw.'E'• 5tAe1n1'Llk5,
(Z-) -r%lt ?4ohee~- 5irv-vt YooAwa4- Se,c.fiv4 'qt-,ov~ S-ta. 15t25 #v 1-1-A-7-5
dI: SiIF~C~,TI~N:~ `~i ~►i S l s'~ e. Vcai pktc5 e. ei ikzV-i A vro v►~' i s+
S ti d e w *lk ska-ie. r► ot 6e eh t e qu; re-I Q r Ca v, s t)- tLc+e. d ik rttij
vf Vlc~+s j i-k$ ?-;Aqemo,'+ su.b4iYisiav' W'kic.~ include
of k-❑ 0-As *0 ?-3-1 lo#s.
A drainage easement was dedicated acrvss the west 15 feet of Lot 2, Block 1 of R.E Nn. 4- 0' Addition far
future runaff from the east ha€f of Pivneer Street. kather than const-ruct the pand ❑n Lot 2, Block 1, which
wauid create a disruptiari ta the homeowner, the devsloper is proposing tv tilt pazt of the Pioneer caadway
seccian and collect the starmwater from the east half af Pioneer Street irs a pond an Lat 14, Bivck Iof
1~dgemnnt Estaees Na. 4- 7`' Additian. f~~~na1~y, Pioneer Street was ~ving ta e5c#end fram Sta. 11T58, but
Grace Hu-vest Church gurchased thas praperty sauth of R.E No. 4- 7`" Additivn, and it appears that Pioneer
Street wiIl not be extended. Grace Ha.rvest Church v+iR he respansible for star,mwater considerat-ions sauth of
R.E. No. 4- 7' Addition.
SL-3.~7 'BY ~ ivkpson Sinqivveers . -TKc. I?ATE
AADFZE,SS - 14_ 9D9 Ar'sane ~ ~pkaKe, Vt~A Zip COI3E
. ,
. • . • ADNiM%r~= VARTAN `L.~ = 9F M.4D P.UD 'Id'Sc"QK.INE Cfli7NkY ` .
• I026 W 9Rfl.4I]WAY. 5rflKANE WA 99250-41'i~0 P'FxGNE (--G5}¢56-3600 FAX {_5}32434T8 ' . r ~
c,~ e DA~ 3 .
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Request fmr T]esien Deviation
Ta: Bill Hemmings, P.E.
Fram; Ed F'arry; P.E. '
I]ate• February 17, 2000
Plat: P1423F -Ridgemout Estates #4, 7`h Addition
Summax-v
The agplicant is seeking aDesigni Ileviatinn for (i) deletion of sidewalks alcang 21 ' Court (a cul-
de-sac), and PiQneer Street, vyhich cannects to 2V' Avenue, and (2) to super-elevate the southerly
end of Pioneer Street, so that drainage will be collected in a swale on the west side of pioneer. Thzs
is Che fmal phase o£the Ridgemont 5ubd`rvisian.
Recvmmendatiars
Item 1
I recottunettd agproval of Item (1) of ttus deviation with these canditions.
1. 5idewalk is to be canstruc#ed along Pioneer AVenue.
2. Sidewa.lk may ba deleted firom 21' Court, provided that an equal length is prmvadeci
from the intersection of Pioneer ~20`h Avenue west fioward Sullivan,
3. The County's Sulliuan Road CR]' rvill construct 1he frantage imgroVemertts requi.red
an Sullivan for this plat, with the Develaper paying a pro-rata share of the pro,ject
costs. Tf the length of sidewalk relocated from 21 ' Caurt to 20'h Avenue is not enough
fio link up ta the sidewalk canstructed vn the Sullivan Road CRP, the County wiil
credit the cast of the additional sidewaIk against the T3eveloper's share of the Sullivan
RQad frontage impraverraents far this plat.
Item Z
I recQmmend disappaoval of Item (2) of thrs deviation,
The Deviation praposes a 30'-waide drainage easement on the west side of Pioneer. A 15'-
wide drainage easement exisds along the eas€ side Q£ Pianeer just outside the plat boundary. 'Fhis
existing easement `vas dedicated with the Plat of Ridgemvnt Estates #4, 4d' Addition. The easement
is shQwn Qn the drainage plans for the eariier pfat as baing for the purpose of future drainage facilities for the future Pianeer Street.
The Staneiards can be rnet without the Deviation. Terraiti or other limitations da nat
reguixe that a Deviation be provided ica this case.
+f Yf"~ .
S A N E . ~ [3 ti N° "T Y
DIYISI[3N t3F EIVGTNEERING ANI] ROAD5 A I71VISION pF THE I=[113LIC WORK., I7EPARTMEhf'S°
Wibliam A johns, P E., County Engmeer
February 24, 2(}(]0
Kevin McMulkrn, ;P. E.
S impsvn Engineers
909 Noc-th Argonne Road
Spak.ane, W'A 99206
5UBJECT- P1423F -Ridgemcrnt Estates No. 4, 7th Addition
l3esign Deviativn (Sidewalks, Road Crnwn)
Gentlemen:
We are returning tttis Design Tlevration Request. Itein #1 (5idewalks) was approved with
cvndicions. Ttem #2 (Raad Crown) was disapproved. Please include a copy of this Requesc
(wlattached conditaons) in your next plaii submittal. PIease nate tliat appravat af this Request
expires along wgth the expiratian af the rvad & drainage plans.
If there es any disagreement, or if further discussion is needed vn these a#ems, please contact
Ed Parry at 477-36[]0. 'T'hank yQU.
Sincerely,
VVilliain A. rvhns, P. E.
Spokane County Engineer
4 - •
Edr4arl. ay, P.E.
Plan Review Engineer
enol [les:gn f]ocumenks - plans
cc praject fi}e
revrewer {commants vn1Y}
5pvnsor Keii Tupper 12329 East 5prague 5prkaire, WA 94215 . 1
1026 W Broadwap Ave 9 Sppkane, WA 99250-0170 a (509) 477-3600 F,4X (509) 324-3478 TDL7 (509) 324-3166
l~
~
Memo
May 18, 2001
To: Chuck Simpson, P.E.
Via Fax (926-1323)
From: Ed Parry ~
Re: P1423F - Ridgemont #4, 7'" Addition
Chuck:
I've looked over your recent submittal for the sidewalk along 20`h. I have these questions:
Sidewalk detail, 20`h & Sullivan
1. How do the existing/proposed surface features relate to the right of way?
2. What is the station & offset of the new CB?
3. How does the slope catch out from the new sidewalk to the new CB grate elevation?
4. What is the length of the new PVC pipe connecting the new CB to the existing drywell?
What are the invert elevations of the pipe?
5. How do the existing/proposed features relate to the pond floor limits?
County standards indicate that a 10-inch diameter pipe is the minimum that should be used. The
County Operations & Maintenance Engineer indicates that the 8-inch diameter pipe proposed at
this location will be acceptable in this situation.
Driveway detail, 15518 E 20'h
.
1. How do the existing/proposed surface features relate to the right of way?
2. What is to happen with the existing bushes? Who is responsible for relocating them?
A sketch page submittal (as opposed to a full plan sheet) will be acceptable for working out the
details at this point. Once the details are finalized, the sketch can be transcribed to the Mylar.
Please call if there are questions
Ed
477-3600
~ I
RECEIVED
~r~ MAY 1 4 2001
psor~ En+~. ~r~rs, lnc.
SPCIKANE COUN7Y ENGfNEER
GIVIL ENG1NEERS AND LANd 5UR►VEYORS
N. 909 Argvnne Road • Spckane, WA 99212
(509) 926-1322 • Fax: 926-13M
TO: E r.A Pfa
SUBJECT: _5,Jv-, k-
DATE: Sri 4-1 o i .
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Signed
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REC~~
6impson Engine+zm, Inc. UAB ~ ~ 6 Ituo}
CIVIL ENGINEERS AND LANb S4JRVEYURS 7
N. 909 Argvnne Road • 5pvkane, WA 99212 sgoKA~E r_oUNTr ~~G40_
(509) 925-1322 • Fax: 926-1323
TO: E.- e~ -Pa rrj P'• E'. 5;o r,r~ ~c5. c> :n~~r 5:
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DMSI[]N [7F ENGll+FEERIIVG AMD RdADS A DIVI5It7N OF THE P[.F9LIC WORKS 17EPARTMEiHT
William A. jehns, P.E., County Enguteer
April S, 2001
Chuck Simpson, P.E.
5impsnn Engineering
922 N. Arganne
Spokane, WA 9921 2-2789
SUB7ECT: P1423F - Ridgemour Na.4, 7"' Additian
2°d Submittal
C%ent2emen:
We have conducted a cursory review of your March 12, 2041 submittal ofDesigri Dc►cuments far tiiis project,
and we have f4und that the submitCal gereerally does not confaran to the requirements af fihe 5pakane Caunty
Strrrrdards for Road and S'e-wer Constructian ar the Guidelines for Stormwater Management. We are,
therefore, unable to accept your submittaI far review at this time.
Our observations are noted an the enclosed ]isting. Please do nok consirue ihis listing as being camprehensive
If you have any questians about this review, please cantaci Ed Parry at 477-3640. Thank you.
Sincerely,
Rass E. KelIey, P.E.
5pakane Cnurrty Engineer
r Pe-
E wa,~J. Parry, P.E.
Plan ReView Engineer
cncl L)esign 17ocumenYs - g[ans
Cornments ( l Page)
Suhmittal Checklist
cc4iect filc
rcviewer (comments onEy)
Sponsus Ken Tupper, 12929 E 5prague, Spokane, WA 99216 (comrrsents only)
1026 WBraadway Ave. o Spakane, Wt1 99260-0170 ■(5f}4) 477-3600 FE1X. (509) 477=7655 {2nd Floor} 477-7478 (3rd FPoor) ■ TAD. {504} 477-7133
Chuck Simpsan, P.E.
P'1423F- Ridgemont Na4, 7`h Additiao
2°d 5u6mittal
April 5,2001
Page 2 uf 2
Items needed:
• A Submittal Checklist was not received with this submittaL A 4lank Submitta! Checklist is enclased.
Pians
. 24`h Avenue: A Desigrr Deviation ta deiete sidewatk on 21" Gourt (dated Feb. 3, 2040) was ap,praved,
provided th$t sidewalk was pro►+ided un 20'b Avenue. 5idewalk plans for 20`g Avenue shauld be included with
the next submittal
• Pioneer Road
• 1'he drainage patfierns indicate that a cancrete cross-gutter should be provided at the intersection with
2i1th Avenue
o Veetical curves appear to be too short for the #errain and design speed. A Design Deviation should be
submitted to justify these elements
o ~`rrading catch paints should be indicated, and coordinated with slope and drainage easements
❑ Type S curb should he pro►rided to convey flows on this slope
a Has the proposed st.op sigrs at the intersectlan with 26`h A.venue been coordinated with the County
Traffi c E ngineer? 5top signs are typically required anly at intersections with Arterial-eated roaiis.
. 2 1 " Court
o'1"he curb profile on the cul-de-sac was no# received with this suhmittal
Calculations
■ Drainage Calcuiations-
0 5ails at the drywell lacatians should be uerified either through boring.s ar through test pits. We
reccammend that this be accomp9ished privr to the nex# submittal. As a manimum, it could be
accomplished eoncurrent with the sewer consbruction.
• Pauerrient L7esign: Test pits should extend t0 5' below suhgrade elevation {per Technical Referenee B}, This
can be aceomplished during construction
> •
Submittal Checklist
for Road & Drainage Projects in Spokane County - Plats/Short Plats
This Submittal Checklist is to be completed and signed by the Sponsor's Engineer, and included with each plan
submittal into the Spokane County Engineers Office. If this form is not fully completed and signed, do not
submit plans and calculations to Spokane County for review and acceptance. Incomplete submittals will be
returned and will cause unnecessary delays for your client.
Project Name:
Spokane County Project No. Date:
Project Engineer: Phone:
Project Sponsor: Phone:
A. Preliminary Process
Prior to Submittal of Road and Drainage Plans, the following events are to have akeady occurred:
(By checking each item off shown be[ow, you are staling that you have verified these events/rtems have been completed.)
0 ~ Adoption of a Hearing Examiner's Report for this long plat, or a Planning Report for this short plat.
0 ~ At least one Pre-Design Meeting has been held with County staff at the Engineers Office.
p An "Agreement to Pay Fees" has been signed by the project sponsor, and submitted to the County
Engineers Office.
p A Channelization Plan (e.g. signing and striping plan) of public roadway improvements, has been
coordinated and discussed with the Counry Engineers Office. ,
B. Road and Drainage Plan Submittal
The items listed below are to be provided as a minimum with a road and drainage plan submittal. Additional
information may be required to demonstrate that the plans meet all applicable standards.
(By checking ';yes" for each item shown below, you are verifying lhat these items have been completed and are included
in this submittal. For any box checked "n/a", a written justification of any omissions at the end of this section is
required.)
Item Description ,
0 yes Road and drainage olans, two print sets. (Certification statement on cover of plans)
0 yes Each Plan Sheet of record is signed and dated by the project sponsor.
p yes The road and drainage design meets the requirements of State law, WAC 196-27 regarding
"conformity with accepted standards"; that is, the design reflects the "state of the practice"
for the proposed concept.
0 yes The plans, Drainage Report, basin map(s), and any other calculations are stamped, signed
and dated by an engineer licensed in the State of Washin;ton.
p yes 0 n/a Drainage Report, two sets. To include: basin map(s), time of concentration routes in basin
map, and Certification statement on cover of report and basin map.
0 yes 0 n/a Geotechnical Report, one set. (Include all soil test pit/boring logs.)
0 yes 0 n/a Structural Pavement Calculations, one set
0 yes 0 n/a Cross-slope grade calculations for road widening projects.
* . m
p yes Qnla Msintenance Manual and 5inking Fund calEUlations far drainage facili#ies 1ocated autside of
eaunry raad right-of way.
0 yes 0 n/a Written ex,planation of wholwhat entity wi11 be resportsible fvr maintaining drainage facilities
which are lrscated 4utside af public road right-of-vvay, and that the plan is accep#able ta the
Counly Engineers [3ice.
p yes 0 rafa Channsliza#ion Plan, crr signing and striping informatian provided in the road plans. To be
inclvded in road and drainage plan set.
0 yes 0 n/a a have read the Hearing Examiner's Report (lang plat), or PIanning Dept. Findings and
CoIldltl[}d15 (5FIgTC plat), far this pruject. The design meets the conditions in the repart.
0 yes 0 n/a Cap,y of Approvei Des ign Deviations.
p yes 0 r9/s Fu-e District ApprflVal, for pnuate rQads.
p yes 0 n/a Lat Plans. Required for any lots with drainage easements and which front a public soad, or
for lats which receive and treat runoff from a pubiic right-Qf-way.
0 yes 0 n/a Any applicable State and Federal permits have been ohtained. (i.e, MFA, ]ARPA, etc.). For .
Fermits with conditians, a capy af the permit and conditions are included in the pian
suhmittal.
0 yes 0 n/a Inspection Agreement betwe.en the sponsvr and its engineer.
0 yes 0 n/a Far aff site easements t4 be grantexi to Spokane Cauniy, the follo+dving items sha11 be
included: legal descriptian, exhibit, and proo£ 4f ownership.
Q yes 0 n/a Erasion Cantro1 Plan, required fnr "Major Land-Disturbing Activity." Ta be included in the
rQad and drainage plan set.
ExpPanation far any items listed above vvhich are not included in this submittal:
(Nate. an insufficient justif caition af why an item was not included in the submitted, or inr.omplete documents, may resulf
in the submifital being retumed without review gr withnut acceptanCe. Pravide attachments if necessary.)
By signing below, the engineer is stating that the infarmatiott prorrided in the subanittal is complete, that the
inforntation proVided in fihe Subrnittal Checkdist is acCUrate, and the plans and +calcuIatians are in accoedance with
the Spokane County Stcrrzdurds frr Rrcrd c4r Sewer Co~structron, and the Guidedines for Slormwater
Mcrnagement, e.ccept where an approved I7esign Dewiation allaws otherwise.
Engineer's Sigriatwe: Date:
Engineer's Name:
(please print)
If there crre any questions abou1 thr"s form or approFriate procedures, please ca11 Devedopment Services,
Spokune Cauraty Publac Works, at {509} 456-3600.
For Spokane Cauaty Use vnly
Submittal ]+ia: County Plan Reviewer:
p Accepted in for Review or Construction
Ll ILeturned to the engineer without reView andfar acceptance, See attached ietter af explanation.
Pracessing Date:
Submittal Cihecktist 2
Spokane County Public "Vdorks; Apri129, 1998
APR-26-2008 16:08 -"MPSON ENGINEERS 509 926 1323 P.01iPY13~
FW.Lnded
( ) ~impson Engi7teeTS, Inc.
. ~w
N 909 Arganne Road /l1
Spvkane Wa 99212 ~
Phone 926-1322
Fax 926-1323 ~ '~t a~i
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Ta: Rroea:
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Attentone ~ r r~ } Pz9ex (Induding Cover Shea) ~
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' Fa)c . Date: l.~. ( 2_fa(QO
Re: ~ << K-~ E.~-~~~ a. ~ Add.
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C2 tlrgent C3 Ror Review 0 Pleass Cotamon! O Please Reply 19 Per Your Reguest
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I
TOTAL P.01
APR-09-2001 16'29 SIMPSON ENGINEERS 509 926 1323 P.aifbj
P `
~C~ F~.a ,9.a
Vti7np9i soTt, Er~ neeT-s, Inc.
N 909 Argonne Road
Spakane WA 99212
Phane 926-1322 Fax 926-1323
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Attervtcta E.cl pu rrJ1 Psgas: (Intludiog Cover Sh~t) ~ fauc - Wte: 4-I h/ o r
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D Urgerrt IS For Review 0 Please Comresve+t Q9 Please Repiy C3 Per Your Rrquest
0 Comments:
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1f you tecE~i?d fhis fdc in errnt' p{ease cait ?~Y'r13? % and let us know. Thank you.
RPR-09-2001 16:23 509 926 1323 96f P.01
APR-e9-2001 16:29 5IMPSQIV ENG I NEERS 509 926 1323 P.02i03
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f V WG.Memarandum
Date: Apri124, 2001
'I'o: Chuck 5impson, P.E.
Fram: Spokane Caunty Engineer's affice
bev~elopment Ser►+ices {Ed Parry, El
Subject: P1423F - Remington #4, 7th Additian
Sails InVestigatioos
Chuck
The soils irrfvrma#ian yau praaideci in yQUr Apnl 20th memo vtill he adequate at this point in time
Please be sure dunng cons#ruction ta venfy that the soils at the drywells locations da canforrn to
the Garrison classificatian
Thanks •
Ed '
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CIVIL ENGINEERS AND LAND SURVEYQRS
N. 909 ~Argonne 9) 926-R~2 • F~a 92~t3i ~~21 ~
TO: r,~ ~G[ r r _~1~ e- ~.-,a
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SUBJECT: 4-- 1`~'~ I~ cL
bATE: q- t a~ I r
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SIgRed
Chuck 5impsan, P.E. -
P1423 F - Kidgemont itiiQ.4, 7'h Addition
2°'' Submittal
April 5, 2041
Faga 2 af2
Iterns needed•
■ A 5ubmittal Checklist was not receiued with this submitta[. A blank 5ubmittal Checklist is enclosed.
Plans
■ 2D6 Avenue: ADesign Deaiation to ctelete sidewafk on 21' Gourt (dated Feb. 3, ZUUO) was approved,
provided thai sidewalk was provided on 20`h ,4venue. Sidewalk glans far 20`b Avenue shQuld he 7nclud'ed with
the next submittal
• Pioneer Road
o The drainage pattems inciirate that a coracrece crass-gufiter shauld be provided ac the intersectian wsth
2p`h Avenue
o Vertical curves appear to be too short for the terrain and deslgn speed. A T1esign Deviahon shaued be
suhmrtted to justii`y ttiese e[ements
v Cirading catch pmints should be indicated, and coordinaCed with siope and drainage easements
v Type B curb should be provided ko convey f3nws on this slope
o Has the proposed stop sign at the intersectian with 2e Avenue been coardinated with the C4untry
Traffic Engmeer? Stop signs are typically required only at inteesections with Arteriai-rated roads
j c~. s
• 21 " Court I
o The curb prafile an the cul-de-sac was nat received with tlnis submittal
'
GalCUlations
• Drainage Calculations:
SaiIs at the drywel] locations should be verified either through borings ar through test pits. We
recommend tha# this 6e aGCOmplisited priar t4 the neart submittai. As a[rtrinimum, it could be
accomplished concurrent rvith the sewer construction
%mr1lavement Design: Test pits should extend tsa 5' below subgracie elevaiian (per Technical Reference B). This
ean be accompl'rshecS during cvnstruction
• ~ ~w'k
~
Pre-Design Meeting Nvtes
Spokane County Encrineers +Qffice
Prvject Naraie:_L06)&.W' 6St M'~S f4- r 71'f~ 1~014 Fraject iVumber:
Prvject Sponsor: 1~eN 7uV(!l- ~
Spansar's Engineer:
~ Design ~
Firm: Engineer: ,kW►AI RLAaa.Lk4,j
;
Meeting L]ate: ~qJ~,_~fq Meet.ing Tune: 4W
Cvunry 5taff' Present at Meeting: 69J) PWAY P•L_
t
C?ther iVleeting Attendees:
~ 'VOu.p~ ~5i~t,
1 ~ namelrepresentirsg narnefrepresenti_ng
natneirepresenting _ namelrepresenting -
The Fo1lowing Items need to be '1)iscussed wf the 17esign Engincerr
General Items
1 a. List certain special requirements listed in the Canditians of Approval, EIS, or MDNS. TWs
is nat an all-inclusive 1ist. The Engineer arsd Spvnsoc is responsiUle for adhering to a11 Conditivns
and design eriteria,
.r~'o 4,143
S'Jv F~~ ~ 9 r f ~ `5 af4jea-
description referenee
~I.~.i u'~•.r 1►~~r~v~ t~w P,!!5 4r 17
description reference
description reference
descriptiQn reference
Ib. I)ves the Engineer have a ce~py vf the Exarxainer' siStafF Conditions of Approval?
r,,t4t-zl~ I 144444f -rffte
r r
'~age: ~
Pre-L"]esigta Meeting Notes far Pra~}ect.
5pokane Caunry Fublic Works Include Standard P1an notes in the Road and Drainage Plans.'(Ofow 65 U4
Road Plans
I. R4ad Classificatimns and Design Criteria. .
-41 ~ #2 #3 #4
~ Street Name ~ P&Vialt r D~r GT
~ Classification
C 1~ "G pmzdl
R,aadway Widtl~, W ',,o
Manimwmm right-Q£ way
Wldfih ~ T t
see nate (1) ~ ftn~
~ Min. HQn'z. Crarve vvl super Ke tqal~- :'w'~ ,
~
l Min. ~Ioriz. Curve wla super
V General Land S1apeITerxain ~ 57o 31.
Design Speeri, mph 30 1175 .
Curb Type & Clear Zane
(see Sec. 3.15) ►'~'i~~ . ~
Sidewalk required? (Yeslno) p-o%l ~
Nate (1) Additional xight-of-way may be given by the Sponsar.
D15CL15S1C}ll: lD I7 DF~ G13 :50evAlK R4~ lr -5 rAc7a°r Lxs A71"O N,Oev 4 0 c
W cr A a16 c t f 7/~+~°u
[ gv y«Y!..wJL c'st 2'-rk
~
AcCOrding ta fihe Design Engmeer, what is rhe maximum number of units which will have
. access from a single roadway? C~ yr~ W'hat is the ma~c. allowed per Sec. ~a<3
~ 3. A~'~inimum intersectian spacirsg is 300' far along a Principal ar Minor Arterial (per Sec. 114),f`~
ansi 150' for aCollectvr or Lvca1 Access street. What spacing is provided for this project?
~
- r~~~ ot 2&-P-
7~ A4
r . w • [y Pre-I3esign Meeting Nvtes far Project. Page• 3
5pokane Caunry Public Works
4_ Are any off-site slope easements needed, ar off-site right-vf-way acquisitaons needed? Tf so,
describe.
~ ~ ~ /Ul~~~ ~ V O%J 7z>
5010
5. What type ot tum-araunds are needed? (i.e. cul-r3e-sac, hammerhead, etc.)
Street Name Tum-araund Type Locatian
5ro-
-Z-t i-r C'C" C"-
p0m2t- 4*ww4too
6, Road Surfacing Requirements (Sec. 3.16)
a} What methad in determining raad surfacing requirements does the Design Engineex prapase
to use (i.e. AASHTO Design Mechod, Couu.rity thickness table, vr o#her)?
b} Frovide the Uesign Engr. a copy of the Soil Sarnple Procedures, Design Report Fori-riat &
~ Altemate Pavement Design Tab1e. t-~~k
7. Does the Engineer plaa on applying for any Design Deviatians? Tf sv, briefly describe
belvw.
Please note that approv al vf all Desigta Deviation's must be abtazned privr to construciion
plan submittal.
; CW4VJGC
~ y
Stormn Draiaage
' 1. Basin Map
" a) Did the Design Engineer bring to the meeting a basin map? . rf so, does the basin
map show tapagraphy and suff'icient infvrmation to be usefuI?
,
b) Does the basin map depict an.y contributing off srte runaf#' flowing ontv the properiy`~ ~Aho
Daes it appear to 6e carrect? 1(~j . If not, explain.
, c} Is asite visit needed to verify the basin limits? P'V• Schedule f4r: .
. •
Pre-Design Meeting Notes for Project: Page: 4
Spokane County Public Works
{Note: Concurrence with County Engineer's on basin limits is required prior to plan submittal.}
I 2. Is the site located within the Aquifer Sensitive Area (ASA)? qES . What type of water
quality treatment is proposed by the Design Engineer?Irp 2t,6
~Gt 6r /:~L~1~4. ~PWt2Q~hBiL~7~' ~,oGlES CScZ' ~Sw~
, 3. What subsurface investigations, if any, are needed with this project to make sure the
~ proposed dis osal process will function as planned.
~ ~ kP~a1X~- ( ~ 4~=iw~ s Oti 2~5 ~ ~i`mv1
•
4. Are there downstream conditions which will affect the design of drainage facilities. If so
describe possible mitigative measu.res.
r£~-
, ~
5. Is maintenance access provided to each GPA swale or drain~ge pond? If there is something
unusual, what requirements were given to the Design Engr.?
.
~ i►
6. What does the Developer/Engr. propose for providing for perpetual maintenance of the
drainage facilities? Please briefly describe proposed mechanism, and what is needed to
accomplish this.
~~~C 94*05 - -&a+r~# AOY,rTA,~~ /,P-_ 1W5f6LY_ PIVI (~Ra,&A
7a. What Design Storm(s) should be used in the course of analysis (i.e. 10-yr, 50-yr, etc.).
2* w Ad,~~O,(
U , v .
7b. Is a Detention or Retention system proposed? Please describe.
AID
~ • • J
Pre-Destgn Meeting Notes for Project: N'e 5
Spakane Counry Public Works
~ 8, Are Erosion Gontrol Nseasrr.tres required with this project? If sv, briefly describe applicable
req irements. ~~i ~p',r` +~'y'.- • ,f
61rr_~,A
I -
'
~ 9. Ts a second Pre-Design Meetrng needed? .
i,
fI List ❑f Docuuments Provided ta the Sponsar's Engineer:
; a} JuA45' ~~Om '
b}
C) '
: d}
f e)
Any errsement.s needed vutside trf the plat boundcrry, fDr drar`nage or afher, arc to be acquired priar
' to rvad and drainage plan submittal. The Sparzsor or 5pansor's Engineer sFra[lprvvide separately
a legad de.scription and Tit2e Commitrraent (or szmrdar prQof of ownership) af the affected parce2(s)
~ fvr praposed easemants.
' The Submittal CheckIist, completed crnd sfgned by the Sptrnsar's Engr'neer, .shaTl be provided with
~
each pdan submattal.
~
tVote: 1provide a copy of this compfeted dacument 1o the Design Engineer a1 rhe end af rhe pre-
design meeting.
~'~1n ~ ~7V►e ia.~,~,r. ~i S [r3,a
fs)-~ pl iw P rJ 4
~ ~ ~~~s~.~~~~~ dr~~1~
is ~f y~~ce.sr~~y
s i d n waliK .i ~e a h ~e ^r f a'~Lc7~,
~ 4~ ~ 5u~~i~I~h ~ao~ci i`y^^,,~~•ave.~e~,'~~ ~
114, 1-fr
Ve/
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'~--in~~Y~~~G~'~t}'~;°'-►+a-~ ~ ~rk ~°~A-~--E}B-F- r- ~ r+Y~sJ'If~~+! @h-~ ~ i
lr o (k 6-!-k + t 'C~~ ~ •~a1 i~~,~Lr _~-tLi.~C_~~, r . Yt~V4
a~
- _ - _
i ~ ~ ~ f~r~~~ _ -
. '
s T R a e a GEOTECHNICAL ENGINEERING 8 MATERIALS TESTING
~
1620 N Mamer Rd. Bwldmg C Sune t00. Spokane. WA 99216
509897-1904 ! Fax 509891-2072 / e-mail stratspk0ea com
May 24, 1999
Client No. SIMENG
Project No. 5990026-1
Reference No.: SL05201
Mr. Kevin McMulkin
Simpson Engineers, Inc.
N. 909 Argonne Road
Spokane, WA 99212
Project: Ridgemont Estates No. 4 7`h Addition
Date Received: May 12, 1999
Date Tested: May 13, 1999
Description: Brown Silty GRAVEL
Location: 21' Court Cul-De-Sac, Sample #1
SIEVE SIZE ~ % PASSING I SPECS
3.0" ~ 100 ~
1 '/z" 59 ~
1.0" 49 I
3/" ~ 46 ~
~ %z" ~ 38 I
3/8" ~ 35 (
No.4 ~ 27 ~
~ No. 8 I 20 I
No. 16 ~ 14 ~
No.30 ~ 12
No.50 ~ 11 ~
No.100 ~ 10 ~
No.200 I 8.3 ~
Sincerely,
STRATA, I1VC.
Rick Woodworth
Testing Services Manager
x.rw:c„ •
IDAHO • WASHINGTON • OREGON • WYOMING • MONTANA • UTAH • NEVADA
. '
s T R a T a
GEOTECHNICAL ENGINEERING 8 MATERIALS TESTING
~
1620 N Mamer Rtl , 8uiltling C. Swte 100. Spokane, WA 99216
509891-1904 i Fax 509 891-2012 / e-mailsUatspk@iea.com
May 24, 1999
Client No. SIlvlENG
Project No. 5990026-1
Reference No.: SL05201
W. Kevin McMullcin
Simpson Engineers, Inc.
N. 909 Argonne Road
Spokane, WA 99212
Project: Ridgemont Estates No. 4 7`h Addition
Date Received: May 12, 1999
Date Tested: May 13, 1999
Description: Brown Silty GRAVEL with Cobbles Location: Intersection ofPioneer Road and 21g Court, Sample 42
f SIEVE SIZE I % PASSING ~ SPECS
~ 5.0" ~ 100 ~
4.0" ~ 86 ~
3.0" ~ 86 ~
1 '/z" ~ 76 ~
1.0" ~ 62 ~
3/4" ~ 54 ~
1 /2" ~ 44 ~
3/8" ~ 39 ~
No.4 ~ 29 ~
No.8 N 23 ~
No.16 ( 20 ~
No.30 ~ 19 ~
~ Na.50 ~ 18 ~
No. 100 I 17 I
No.200 ~ 14.9 ~
Sincerely,
STRATA, INC.
iv
Rick Woodworth
Testing Services Manager
RJ W:cm
IDAHO • WASHINGTON • OREGOP2 • 1NYOIOII4G • MaWTANA - UTAH - NEVADA
Sullivan Road
ftidgerYrant Estates no. 4- Tth Addition
Sullivan Road
Length = 430 ft
Updated 03108101
PropQSed Typicaf Section information (CFtP 1679)
0.17`Class A (2.0")
0.17'ClaSS E (2.0")
0.50 ' CSBC (6")
PsphaEt Area far 11.5 foat width, 303.14 feet length 4,945 S F.
❑uantity llnits Unit Price Arnount
Mobilization 1 L.5 0.00 0
Clearing and Grubbmg 'I L.S 500.00 500
Roadway Exe.avation incfuding svvale 433 C.Y. 5.50 2,383
Crushed Surfacing Base Course {6" } 110 C.Y. 28.81 3,166
AC - Ll. r'1 {in ~ 549 r7. 1. 4.76 2,615
AC - L..l. E{Gn ~ 649 C67 sd.7V 2,615
Type B curb 430 FT 7.49 3,221
5od and Sprinkler system 597 SQ. YD 4.50 2,688
Topsoil 66 C.Y. 23.33 1,533
Sidewalk 2$7 5G]. YD 16.85 4,830
aryvvell, Type B 1 EA. 1,728.0$ 1,72$
Metal Frame and Grate 1 EA. 256.15 256
5ub Total 25,535
PE 10°Io 2,554
CE 10°!0 2,554
Total 30,642
STORMWA'TER T)RA,INAGE CALCULATTONS
FOR
FdDGEMONT ESTATES NO. 4- 7TH ADlJITION
NW 114 0f Sec. 25, T. 25 N., R. 44 E W M
Spokane Gounry, Washingtvn
Apri1 28, 2000
E. S
Pt'epared by: w►~
Simpson Engineers, Inc.
North 909 Argonne Road 9967 SpQkane, Washingtcan 99212
j~NAi.
~ EXPtREs 711 7J01 ~
The design iFnprvuements shown in this set of plans confarm to
the appiic,able edttions af the Spokane County standards for
road and sewer r,onstruction and Spokane County guidelinm far
stnrnwater management. A11 design devia#ions have been
approvei by the Spokane County Engxneer I approve these
plans fcsr cnnstructiQn
i. Sun7Trlm'y
II. Stormwater I]rainage Calculatians far Basins A1, A2, B, C, and D
of Ridgemont Estates Na. 4- 7th Addition
111. Attachments: Mm
* Itaadway Surfacing Design spoKANEcOuNTY ENGINEER
* Soils Nfap and Tables
* Ridgemont Estates Nv. 4-40' Add.; Offsite drainage map and calculativns
* Ridgemont Estates No. 4- S`hAdd.; Drainage calc`ilations
()(779C,!AL PUBLIC bOWMEIVl'
,,~POr AN [-CC]UNTY ENGfNtM OFFkCE
c
~
P:1Prajecta.1i3714ti37i¢20& doc PR'J~.CT ff
:SLrP~fTTAL ~ 1
~"-sETuRN TC GOUNT'Y ENGiNE~R Coe%[
I
Starmwater Drainage Repart; Ridgemant Estates Numher 4-7th Addition
1. SLJN[MAR"SC•
The develapment is divided intv four (4) basins; A, B, C, and D. See .I7rainage Map far Ridgemont Esta,tes Nv.
4-7th Addition Each basin is composed vf twa subareas; I) gr-ass lawns, and 2} impervious roofs, driveways,
and asphalt paved streets. Stvrnrawater flows overlatad acrvss raofs, grass 1awns, and drivevvays and inta grass
drainage ponds. Starrnwater frorn asphalt streets flvws along the eurh gutters and into the grass drainage pvnds
through curb ppenings. The $rass percolation area,s (drainage ponds) were calculated to hald the first 112" of rainfai1 ninaff aVer ihe
asphalt street areas.
Figure 2, page 5-3, of the "Guidelines for Starmwater Management", by Spvkane County Engineers, was used
for rainfall intensiry and duration accurring at a10-year starm frequency
The Ratianal a.nd Bowstring Methods were used tv calcutate #he peak starmwater runvff far each basirr, and the
type ajnd number af drywells needed far each hasin based an the storage capacity of the pand.
In acccrrdance with FpSvil Survey, Spokane CQUra#y,'yuVashington", 1968, the sail is categorized as:
CmB, +Garrisvtt very gravelly 9oam, sirnilar tv Garrisan gravelly 1oam, except that the
surf"ace layer is very gravefly.
Cornrr3ents_
Fac Ridgemont Estates Nv. 4- 4'h Addi#ion, an earth berm v►ias constructed aiong the wes# plat line (east RIVV
of Pioneer Street). This was done to preven# offsite runoff from flawinp, [anto R.E. No. 4 - 4" Addition. f See
offsite drainage map (Basin W) done in 1992 for R.E. 1Vo.4 - 4" Addition ) The offsite runoff is panded
behand the existing earth herm. With the addition of Ridgemant Estates No, 4 - 7'h Addition, a portic+n of the
earth berrn wiil be relocated ta the svuth plat line of R.E. AFQ. 4-7'h Addition tn prevent offsite runoff fram
flvwing anto R.E. No 4-7°h Addition.
Originally, Pioneer S#reet was going tv extend fronn Sta. 11+58, but Grace Harve5t Church purchased this
properiy south af R E No. 4-°7't` Additinn, and it appears that Aioneer Street will nat be extended Grace
Han~est Church will be respansible fcrr stormwater cor~sidera~tions sout~a of Tt E Nv. 4- 7~' Addition
The pand in Basin B was ariginally caristructed t❑ collect runoff from 20fl' Avenue (Basin A) af R.E. No. 4-
50' Addition. This pond will novv be enlarged to accommodate a srnall amount of additional runoff from
Pianeer Street
H. STORMWA'I`ER URAINAGE C.ALCULATTONS
- Basin A-1
Area
Tatat = 94,506 sq. ft. - 2 170 acre
' Pavement = 21stCourt = Sta S+fDS ta "7+95 = 6,895 sq. ft. - 0.1583 acre
Driveways =4 112 driveways at 1,040 sq ft.1`house = 4,500 sq, ft. - 0.1033 acg-e
Roafs =S l lz roofs at 2,000 sq ft Ihvuse = 17,000 sq ft. - 0.3943 acre
In2pervious = 6,895 sq ft. + 4,50[] sq ft. + 17,000 sq. ft _28,3g5 sq, ft. - 0.6519 acre
CrassLawns = 94,506 sq. ft. - 28,395 sq. ft. = 66,1 1I sq. ft. M 1.5177acre
Stara.ee Reavired
a) "248" Storage Requireti =(b,S95 sc}. ft. )(112"! 12 in. per ft.) = 287 cu+ ft.
b) Bowstring = 441 cu. ft. +2 Aouble Baffel I]rywa Type B(2. D cfs ou#)
Stflraee Provided-
Pvnd, 6"j aeep; (20')(30')(0.5°) + (20+-30+20+30)(4.375 ft.z) = 337 cu. ft. > 287
PQna, s=° deep; (20')(30')(0.67°) + (20+30+20+30)(0 67 ft,2) _ 469 cu, ft. s 441
30'
20' 20'
~i11y
L.01J ft. ~I
~ 1.5 ft.
c
T_ - -
3.1 b" _0.5 ft. = 0.67 ft. /3:1
, (1/2)(1.5')(0-5') = 0.375 sq.ft. (1/2)(2.00')[0.67') = 0.67 sq- &
OETENTION BASSN 47E$it"zIV 'AAT1ON14L FORMLJLA FIYDROLfK'rY & 8S3WSTMNG METiiDQ
DRAlNA43E &45IN ANALY515 fQr 10 YEAR 5T[]RM EVENF
~ [yam 5ralm Prapc! Name RidgemQrR EstStas 04 - 7ih Add"stfon
,lob Nn - 13714 Prajec! f..ocaficin. 21sY Court ar€d Presneer
Desigrer J Youma Orairsage Basirs Ffame' Bastn A1
C3tsk Qir P-Proyecrs-draircalc:13714 Urp€rsage BasErs E?sscnplicsn Onsde
' Flartanie 1371421 st "2(18" RBM1tRg Area Narre: "A1"
Far Ridgerrtnrrt Esotes Panding Araa Laseatian. Harth side of 21at Court
PasrR of CosrosnSration Law Pt., 7+95, Lft.
5[SBAFtEA5 TIa OF CANCEhITRAFIORi i7c1, min¢tes
Qesr.ription Aeres C A'C C7vedand F1ow Chennel F1cwv
1mueruious '208"Ataas.: %7maat A: 1..2 ~ 258
_ Asphat3 ?averrient Q 756 0M 0.142 Ct a 01 a Zi = 0 172
' pri-ways 010.3 OM 0.093 L1(4) n 245 Z2 A 36
E3rass Lauun 9 S1 fi o4S 0228 N(A) = 04 aa 4
Rdois 0390 0.94 0.351 S(A) - 0064 n a 0016
7c {R) ~ S.B+f s ~ 0.027
1f~rer Areas- d = 0199
$elnrerrt 8
L1(8) c 0 7c Ich } 5.34
NMJ = A Tc(A+B)= 554
5(8) 0 0 7c tatal 697
Tc (B)= 0.0 Irdaftsliy a 2.83
Tbtal 9asht Area, acres ~ 2.170
Camposits RurofP Cwti'iclenT a 0.38
Comhined {Area ' Runaff Ca'e£f'toierrt} = 4 914 0 (est9maYed @ cf) ~ 2.29 c fs
Tims of Cctncehtration ~ 6 87 mtnubes
'20B' DRWNAGE PARAMETERS
Impennbus '208' Area a 6,895 sq. ft. REA1[ DISCHARGE. 1Q 1(EAR STCiRNI
'28" Valu" P'rwidod a 337 cu. R at 6" depM
St6iR1 3fOfHgB Pf6VfId8S1 = 469 Ct1. ft Bt 8' d8ptl1 Q a L"+ R I' A= 229 C.FA-
BC]WSTMNL'7 Gi4L1"iL,ILATIONS
#1 92 93 94 95 #fi #l NUIN$Eit and TYPE of aRYWEkLS RRQPQSED
Time T'Eme lrttorrsfiy Q decr. 11 m V ouT Staregs
Incrrnnt, trwmsrd. 0 5ingle-Barrel (Spaka[ie County Type A]
(rrtin ) [sec.] OnlFio (cis) t~ ft-) cc„ n.y (cu. R.) 2 Doub[B-Barrel [spokam C4xnty T7pe e]
M1*80) tn'C'Ma cOurvm W~m
697 4184a 2.81 229 1283 e36.87 446 oufflRw amviaed. zc.r s.
5 300 3.98 259 7044 600 4+31
10 600 2.24 1 82 9354 120D 454
95 9co 1.77 149 1502 48w -298
20 1200 145 1.18 1585 2400 -at5
25 1546 121 0.99 1618 3000 -1382 "2W TREATMENT VOLL]ME
30 18M 104 0.85 1645 3600 -1955
35 2100 681 074 16V 4200 -2538 FZequired G PA. pondirtg vdume.
40 240IT 082 067 10$ 48~ -3102 tmper+nous 208" Araa x 1PZ' - 287 du Tf
45 2701 074 0 so 1713 6400 -M7 wFlurrre pravided et OdeFdh = 337 cu. ft,
sU 3L?00 039 0.55 174S WW 420D OK
55 3306 0.64 052 ] 794 5SD4 48UG
6D 3500 0.89 4.50 1859 7200 -5341
65 390 fl.SfS 449 1975 78M -5825
70 4200 0,58 047 2051 aaoQ 4534e
76 4500 0.56 0.46 2197 9= -B$$3 STdRMSTORAf3E IJOLEANE
80 4800 0.53 0.43 2133 9600 -79&7
85 5100 052 U.42 2220 10200 -99M Aliwmum starage requlred b 441 cu. R.
90 5406 O.ra O.49 2257 10$00 -Ba43 volume prvvidel »t 8" depth = 469 cu ft.
95 5700 049 Q.da 2331 11 490 4xm O1(!
1oo WO(! 048 039 2401 12000 -9599
Stmpscin EnpFneers, fnr- 90g 1YrrrBr Argnnne Ftaad, Spckane, iNR B9217 (509) 92&1322
99714MiAl- BMIA1
11. 5TC3RMWA'FER DRAINAGE CAT.CLTLATZONS: (cantinuei)
Basin A-1 (continued)
Curb Onenina on Cvntinuaus Gradle. 5ta 7+82, 7+95, and 8+[]8, 18' Ieft, 21'Court
. a=2in. = a, l'7 ft. F1owline depressivn at opening
y= p. 188 ft. Depth of flow in narmal gutter
Q = 198 Cf5 De51gn d15Gharge
_ QalLa =0. 12 From Fig 16(a), page 6-39 "Spokana Ccrunty Guidelines fvr
Stormwater Management"
L= QI(QaIILa) = 1.98f D.12 = 16.50 ft.
Canstruct Spakane Cvunty Type-1 Curb Lnlets, 3 @ 5.5' each = 16.5 ft, 8 in. deep
DEPTH OF FLOW - y- FEET~y
01 .02 03 Oa OS .06 .08 .10 1.2 .3 .4 .5 .6 .7 ,8 .9 1.0
~ i . . i ' I 1 11 r ! i I , 1.0
1-1
i I ! I ` I ~ ~ ~ I 1 I I
~
s
1-- -7- 4-4 - -r- -r - .s
- I - L ~ ~ ~ ~ -t-r T ~ ~ .4
~
I-J
I .3
i 1 TT~-I~i! T~-I i t{ I X I ~
.z
--l~~i~i Qa
-j ~ ' I Ln
~
o. ~2
44-14
oe
l.,_1 I
I ~ I ~.oe
~ i , ~ • ~ ~
Is
~ ~ t~ ~ I I I~. • i .oa
T .oa
os
~ I,~ _ I ► I I I I I ~ ~ I
.02
I'►.~i--,-I I I I 1 i i~ I""I j. ~ f I It'T'.I
I► I I(, I/ ~ I I I ~ ~ ~ ~ I I ~
oi
i , i.o
.e
~ I ! I I
(a) DISCHARGE PER FOOT OF I icl/ .s
LENGTH OF CURB OPENING ~-_~--+--+o -t
INLETS WHEN INTERCEPTING 1 ~ •B
100 % OF GUTTER FLOW - T ' - ~ - ~ + t
a
L
I ~.Y Y ~ l I I 1
(b) PARTIAL INTERCEPTION 3 Qa
RATIO FOR INLETS OF r- ~
LENGTH LESS THAN L I ~~o ~ I ~ I ~ I I
a i /oe
~ ~ J/~l~ti ~
r.°
I ~ I
L.10
~
.OS .06 .08 .10 .2 .3 .4 .S .6 .B 1.0
Bo,s~h A- 1 L/La
CAPACITY OF CURB OPENING INLETS
ON CONTINUOUS GRADE
6-39 FIGURE 16
Basin A-2
Area
Tvta1= 52,644 sq, ft. - 1 21 acre
Favement = 21st Court= Sta. 7+95 to 9+$2 _(187')(18') = 3,366 sq ft.
Pivneer St = Sta. 16+78 to I9+44 _(266')(18') = 4,788 sq ft.
Fiiiet (2o°)(2ns) - (1i4)(n){20Y = 86 so. ft
; 8,240 5q ft. - 0. 1892 acre
Urivevs+ays =2 driVeways at 1,000 sq. ft Ifavuse = 2,000 sq. ft. - 0.0459 acre
Roofs = 4 roafs at 2,000 sq. ft.Ihouse = 8,000 sq. ft. - 0.1837 acre
Icnpervious = 8,240 sq. ft. + 2,400 sq. ft. + $,000 sq. ft, = 18,240 sq ft - 0,4187 acre
Grass Lawns = 52,644 sq. ft- 18,240 sq ft. = 34,404 sq ft. 0.789$ acre
Staraae Reauired.
a) "208" 5torage Required =(8,240 sq. ft. )(1f2"=12 in par ft.) = 343 cu. ft.
b} Bowstring = 333 cu. ft. + 1Double Baxrel I7ryweU, Type B (1.4 cfs vut)
Storage Frovided:
Pflnd, 6" deep; C(26°)tz0') + (9)(14) + (x /z)(9)(5)l(a. 5')
+(2a+2s+11+14+3s)(o.375 ft ) = 376 cu, ft. > 343
Pond, 8" deeF; [(26')(24') + (9)(14) + (112)(9)(6)](0.67')
+(20+25+11+14+35)(0.67 sq. ft.) = 522 cu. R. > 333
z6' 9` ~
.pn? L r~ a
LV0]
26' Z~"'
2.00 ft. _I
„
i. ~.S ft.
i`
,3: ~ 6" = 0.5 ft 8" = 0.67 ft /3'1
36 x 24 ft. Pond Fioor ~
(i/z)(l.s')(o 5°) = 0.375 sq.ft. (1/2)(2,00')(0.67') = 0.67 sq. ft.
❑ETEPFTiC3N BASIN L3E5{GN. RATI4NAL FORMULA MYQRCiLOGY & 8C3WSTRING AAEI'HOL1
DRAIi+fAGE BASIN RNAtY&IS fm 10 YERR &T❑RM EVEM"i
Ctsta 5f" Project hlama Ridgemorrt fMtes 99 - 7th Additian
Jab No 13714 P;a;"ect Lacatson 21st Couri and Piarteer
Deslgner J Young QraiWs Easln Mame. BasEn A2
Omk Mr PPrv}ac4s diairxafe 13714 Rratmage Bssin Descriptian: drtsite
Filaname 13714a2sds '208' Randirsg ArEra hlaris °A2"
For Ridgem6rrt EsWes PDndtrtg Area Lasa1'son• Ftarth side of 27 st Crntrt
Anird of Canr.enWiop. Law Pt., 9+46, Lft
SUBARF-AS TIME QF CQAiCENTRRT(t]N (Tc), rrtinutes
DescnPtiwi ACres G A'G C)vertand Flwv Charme! Fbw
kpKvknrs 206'Arms: S~td: 62 ~ 225
Asphal! Pavement 0189 U-9D 0.174 Ct ~ 0.15 Z1 6 0172
arhraways fi f,#is 0.90 0041 L1IAi ° a zz = 36
Cirass Lawn 0.790 015 0,'f'1B N(A) a 04 B a 0
Rocyfs 4.984 d 9Q 0.155 S(A) ° 0054 n m 0016
Tc (A) ~ 4.00 s= 4 05
OtnerRress d - d.154
5eqrr9frt B-
P.l(B) = gi Tc {ch } 1.02
N(B) ~ fi 7c(R+6) ° 000
5[B) = 9 Tc icstal $ 00
Fc(8) = 0.0 lnlenslty II 3 96
ticstaS Sasin ATBB, acres ~ 1.209
ComposHe Runotf Coefricient ~ tY.41
Com6ined (Pu&a' Rurtaff Coeffiaierit) = 0435 Q(BStimaie[! @ d} n 1.58 c.F.s
Time of Concerdrati[sn ~ 5.00 minutes
"2a8' CfRAfNAGE PARAMETERS
Impaarvra¢s '208" Pvea = 8,240 sq. ft. PEAFC Dl5GHARGE 10 YEAR $7ORM
'2{f8' Vniume Prywided a 378 cu. ft. at fi" depth
Steum Stossge Pravidatf a 522 cu. ft st 8" dspth Q= C' l' A= 1.6e C.F.S.
BGWSTRfNG CALCULATIOhlS
ptt 92 93 94 #5 97 1JUMBER and TYRE ot pRYVYELLS PRQF'C]SECI
Time T'tme trMtensity 0 dev V in V out Storege
lncrmnt Inr,rmrsf. D Single-Bareal (SpolEtrre County Fypa A)
(min.) (s~ ) (irsJhr) (cfs) {cu ft} (cu ft.) [cu. ft ) 1 Double-Barre! (Spokarse Courtty Type B)
rw~w) (A'CV3) cMff Tm11 0548)
500 3EIO.00 3 18 1.58 633 30000 33.1' Qutflow Frcsvided: 3 c.f.s.
5 300 3.18 7 58 633 300 333
141 600 2.24 1.19 779 600 173
15 9m 177 [].8B 879 m -21
20 1200 145 4.72 935 1200 -255
25 1500 121 040 960 tsm •w °Z[38'TRFATMENF 4'91.Ui4fE
30 4800 104 0.52 9m 1sm -820
35 21[1Q 091 fl.45 993 2900 -1407 Requlred G.13.r4 pondirtg volume
40 2400 OJ&? 041 1016 2400 -1384 Imperviaus'2t18' Area x 1I2" - 343 r.u ft.
" 45 2700 0.74 037 1027 2700 -1673 aQiums prOVidedat fi" depth = 378 cu R.
50 3DDD 0.68 0 34 1D35 30DO -1955 ovi
55 3340 O.fi4 0 32 1079 33f3D -2221
60 3600 a.$y 030 1119 36DO -2481
65 39M nm 030 iv~ 39M -2710
70 4200 0158 429 9236 4200 -2954
75 45M a.56 028 1277 45DD -33223 STORM STORAGE VOL1iME
- 80 48QO 4 53 0.28 1281 4800 -3513
85 5100 052 0.26 1340 5100 -3760 Nacimum siarege required c 333 cu. R
93 5400 050 41.25 1363 54M -4037 voiume provuisd at 8" depth = 522 cu. ft.
95 5700 0.49 0.24 14D8 5700 -4292 (3KI
100 60DO 048 0.24 1451 6000 -4549
Simpsaa Frrgfneea's, Irrr- 409 NorGh Ar9ann8 Roait SRokann, WR 99212 (SO9) 926r1322
1 aT,4.2da - eszl, A
- IT STQRMWATER T7RAIVAGE CALCULATIC}N S: (cvntinued)
BdSin A-2
Curb 01)enina at Law Pflint, Sta. 9+46, left, 21" Caurt
- h= S in. = 0.67 ft. Total height of opening
H= 0.156 ft Depth af water at entrance
Q= a 98 c£s Total peak rate of flaw
Q= 3.087(L)(H)"2 for Hlh < 1, 0 15610.57 = 0.23 c 1
L= i7 =(3.4$7)W = CY 98 =(3.087)(4.I 56}~ = S 15 ft.
Canstruct Curb 4pening; 6 ft. wide, 8 in. deep
Curb Cinenine on Continuaus Crade. S1z-L7&1Q4e-17°►~1-8, 1eft, Pioneer St,
_ a= 2 in. = 0.17 ft. Flawliine depressian at vpetung ,
, Y= 0.079 ft. Dept,h vf flow in narmal gutter
Q = 4.27 cfs I]esigm discharge
Qa1La = 0.054 Frorn Fig 16(a), page 6-39 "Spokarie Caunty ~"ruidelines fvr
Stormwater Nanagement"
L _ QI(QaILa) Y 4.2710.054 = 5 ft
Construct Gurb (7pening; 8 ft. wide, $ in. deep
Use 2 Spokane Cvunty Type-2 Curb Inlets, 2 ia 4' = 8,
RATI(]NFIL FORMl1LA HYdROE.QGY
QRAINAGE BAS1N ANALY515 Tor 1U YEAR STC]RM EVENT
, E3ate: 5ria ProJect Name Ridgemarsf Esates Plo. 4 7th add
DesEgn: kvvm Project NurrEber. 53714
o3sk Fire Pr4rqBcb%1371A13714ai.)d5 Sfte l.ocatian' NW 114, S. 25, T. 25 N., Ev 44 E W M.
Basin 4Vame• "A2 {curby° Basin Qescnptivn. NortFr s'sde af 21 st Ccaurt
Po'srd o1 Concentratim- l.aaw Pt., 9+45.7, LR.
SLIBAREAS, 1r►tensitvaDurafion far 113-vear 5tarm Event
_ flescriptivn Acres C A'C
Tirne Time Irrtensiiy
Incrmrrt. Incrmnt.
Aspha►t Pavemem 0095 090 008S (mtn.) (sec ) (in Ihr)
oriveways Q.raas 090 00641 2 cm Wa
G~ss Lirwn 0536 015 0080 617 370.22 2.96
Rcaais 0138 090 0.124 5 300 318
10 6m 2.24
15 900 177
2L} 12fl4 145
, 25 1500 1.21
30 t aM 104
Taial Basm Area, acres = 0.894 35 2508 0.95
Gvmposfte Runaff Cveff~ctent = 0.407 40 2400 082
Cambirseci (Area ' Runoff Coefficierrt] = 0 331 45 270D 074
so 3DDO 0.68
55 3300 064
60 3GM 061
YIME OF COAFCEIVTRRTION (minutes}' 65 8900 060
70 42DO 0 58
Tc {aveAsndllow) Te (guftar 1fow) 75 45A~ a 56
80 4800 0 53
Ct = 0.15 L2 = 104 85 51 L1L] 052
Z1 = 0.972 90 540m 0.50
; 41 (A) = 244 Z2 = 36 95 5700 [?.49
N(A) = 04 B= Q 100 $000 0 48
S(A) r 0.062 n= 0.016
s = AQ7$
Tc (A) = 5 40 d = 0156
Li (B) = ❑ TC figuty 077
N(B) = 0 Tc{A}B) = 5.40
5(B) = 0 TC tpia1 6.17
Irrteltsity = 2.96 PEAIC DISCFiRRGE, 10 YERft 5TDRM:
TC (B) = 0.0 Ho€ding 3.71
Q= C' I' A= Q.&B C.F.S.
Q(esbmated @ d) = 0.98 c.f s
T'srrEe af Gancentratnn = 5.17 rninutes
Nale: The other 0.3947 acres are ftcwArtg [werYand straight irsto the pcarul and irAa curA inlet an Pioneer 5f
(0.3005 acres are Bovving overtand assd 0 0942 acre.s an Piarieer St }
AXWO
RATIoNAL FoRnnuLA wYDRaLocr
i
, pRAIMAGE BASIN AhIAL.Y515 far 70 YEAR SY[JRM EVENT
pate: 5ri1p Rroject Name• RidgemoM E,ststes No. A 7th °add
Design• kwm Prujest Number 13714
rnskFae P'XPM*tAl331-nt3714ai )ft Sit$ Locatmn. NW 114, 5. 25, T. 25 H.. R. 44 E. W.M
Basin Name' "A2 {curE}" Basm pescriptimi: West side of Pioreer St.
- point of C,orxaentratian Gurb C3pereirrg, 17+16 B, ER , Rianeer ftd.
gUBAREqS• Irterssity-Quraiaan for 1tf-year 5torm Event
Qaseriprtian Aaes C A'C
Fime Firre Irfbsnsity
lncrnssrit Incrcnrrt
r4sphalt R'aVemerrt @.084 090 0.485 (mirr.) (sec) (nJhr}
r+fiveways a 000 0.90 o.ooa (01-.0)_
Gras.s Larvn ii DD0 015 0.000 S.DO 30Q 60 3 18
Roois 0.00io 090 0000 5 300 3 18
10 600 2 24
15 900 1.77
20 '42f]D 145
25 1500 1.21
3C! i800 1.04
, Tetal 8asm A►ea. acres = 0€194 35 2100 0.91
C.ompasit$ Runa# Caeffisxent = 0 8w 44 2400 0.a2
CorrshisESd (Arn.a' RunaR Caefficsert) ¢ 0.085 45 2700 074
5G 3U0D 0.88
~ ~ D64
60 360D 0.69
TIME DF CflNCENTRATbaN (minutes)' 65 3900 084
- - 70 4200 4.58
Tc (overlerid ifarv) "fc (9utter flou+') 75 45M 058
SD asan 053
ot~ 015 L2= 225 ss 5400 o.sa
zl ~ 0172 90 saoo oZo
L14Ap - 0 22 = 36 95 5700 0.49
Af{A} - 0.4 B= 0 tOD 60DO 048
S(A) ° 0054 n= 0.01 6
- s a 4?.Q3
Tc (A) a 0.00 dm 0.079
L'f (S) a 9 7e (gut ) 1.58
_ N03] ° D Tc(A+s) 0.00
S(B) = 0 Tc totaf 5.00
IrytensifY ° 3.16 MW[ DISCHRFtCiF, 40 YEAR STQRA:
Tc (B) = 0.0 Notding 8.02
Q=G' t' A 9 037 C.F.S.
❑ (estirnabsd @ d) _ 0.27 c 1.s.
~f17'IB O} CWICCntf3tton a 5.DO fltlTikll@5
' Nute: The atfer 1.1145 acres are flcriving overlandl inio pond nr flowing iMo curh inkt on 21 st Court
_ (0.30D5 aeres are flavAng overhnd and 0.814 amw are flaunng on 21 st Caurt}
►2f-Fb1
~ v- 0.019
-
DEPTH OF FLOW - y- FEET
.OI .02 03 Oa .OS .06 8 .10 .2 .3 .a .5 6 .7 .8 .9 1.0
LO
f .6
I
~ ~ 4-4-T± -S
i
.a
~j-1i 1~ ~ I I i
~
L
I~~ I~~,'~ _ I ~ j~ I I± I Lo
p I ,~I I I~ I f i ~ I ~.io
i I
~.oe
I I i j I~ I I~ q,~ I ✓ ~ ~.os
m
i ' ~ , 1 ~ I _I I I_ • i ~.os~ o.D54
~ I ~ I r~ ' I i I i
oa
.03
' ~ { ~ . • ' .ox
~
~ ~~~li~ I~II ~ i II~~► I i i
i
~ I t I I I I ~ I I I I_~ ~ ~ i ~ 01
~
I I I ' i 1.0
( o) DISCHARGE PER FOOT OF ~ i C03/
6
LENGTH OF CURB OPENING '
~ INLETS WHEN INTERCEPTING
' 100 % OF GUTTER FLOW
Q
~ • I------- ~V { I 1 ~ ~ ~
(b) PARTIAL INTERCEPTION i I ' ' f f3 Qa
RATIO FOR INLETS OF L- -~abi j~
I o ~ I I j I -I
+ LENGTH LESS THAN La . ~ ~ ~
l i--~--i-±--~--a--.z
~ /,o
0,a
~000,
.10 '
~
.os .os .os ao .2 .s .o .s .s .e 1.0
$aSitn /N-Z L/La
CAPACITY OF CURB OPENING INLETS
~ ON CONTINUOUS GRADE
6-39 FIGURE 16
U. STORMWATER DRAIlNAGE CALCIJLATIONS: (continued)
Basin B
Total Area
Tota1= 32,624 sq. ft. - 0.7489 acre
Pavement = 20`b Avenue. & Pioneer Rd. = 10,972 sq. ft. - 0.2519 acre
Driveways = 5 driveways at 1,000 sq. ft./house = 5,000 sq. ft. - 0.1148 acre
Roofs = 0 roofs at 2,000 sq. ft./house = 0 sq. ft.
Impervious = 10,972 sq. ft. + 5,000 sq. ft. + 0 sq. ft= 15,972 sq. ft. - 0.3667 acre
Crrass Lawns = 32,624 sq. ft. - 15,972 sq. ft. = 16,652 sq. ft. - 0.3823 acre
Storaee Reauired:
a) "208" Storage Required =(10,972 sq. ft. )(1/2"=12 in. per ft.) = 457 cu. ft.
b) Bowstring = 429 cu. ft. + 1 Single Barrel Drywell, Type A(0.3 cfs out)
Total Storaee Provided:
Pond, 6" deep; (15)(52)(0.5') + (7)(8)(0.5') + (13.73 ft.2 )(0.5')
(52+15+52+8+7+12.57')(0.375 ft.) = 480 cu. ft. > 457
Pond, S" deep; (15)(52)(0.67') + (7)(8)(0.67') + (13.73 ft.2 )(0.67')
(52+15+52+8+7+12.57')(0 67 ft.2) = 657 cu. ft. > 429
52' /es~
co
15' 15
52' 2.00 ft. ,
i, 1.5 ft
3:1 6"=0.5 ft. 8"=0.67ft. 3:1
(1i2)(1.5°)(0.5°) = 0.375 Sq.ft. (1i2)(2.00°)(o.67') = 0.67 sq. ft.
~
DETEIJFIOhk B4SIN DESlGH: RATIDNAL FbRML3U1 HYDROLOGY & 'B4WSTRfNG METiiOD
i
QRWNAGE BASIN ANALYSSS for 10 YEAR STaRAA EVEPIT
Date 5= RrofBCt IVarte. Riclgernont Eslales 94 - 7th Addiiian
.1ah No 73714 Rroleet Laastian' 21st Caurtand P€onasr
Desagner J Young i3reinage Basrre Name 6asEn B* Ftunoft 1Ypm Rfdgemont £states Afo.4-6th AddiHon
Dislc fAr R F>rojects dremcalc 13714 [,hein8ge Bastn [3escnption f]nsite
F'3lename 137146 )ds r2fl8' Portding Aree Pfsme• .•6"
Fer Ridgamont Estates Pondmg Area Lacation 20ih Avenue
Paist af Garss:entratinn 51a 14+4$, right
SU6AREAS TIME pF COh1CENTRATfON (Tc), rt€muYes
Qesonp6un Acres C A'G Overland Flwv Chafrnel Flmw
rrme,vkaus 208'Amas- soo,.enrA- c.2= 355
AsphaR Ravemerd 0.252 090 0.227 C! = 8.15 Z1 = 0172
Dnvoways 0193 4 90 4103 L1 (A) = a Z2 = 36
C3ress Lawn 4,352 015 0 057 N[A] = 0.4 8= 0
Roafs O.UOi7 g.~ 0000 5(A) = 4.07 n= 0016
TC (A) a 000 S a 0.015
O6herAreas, d = 4.t78
gpment
s
L't(B) p p Tc (ch ) 268
#(B} _ 0 7c(A+8) ' 000
S(B) = 0 Tc tataf 5(1Q
Tc [B] = 0,0 Irdensrty= 3 48
Total Bsx,ur Pltea, aCr9S a 0.748
Composde Ronoft Coeffident ~ 052
Comhrred (prea ' Runaff Craefficfent) ~ 0.387 0 (estimatetJ Q r!) n 123 c f s.
7ime of Corwentrslion ~ 5.00 mmuta~
'208'C3RWMAGE PARAMETERS
impervinus '208' Area = 10,972 sq. ft. PEAF[ E►iSCHAR6E. 10 YfRR STORM
"208' Valume Provided = 480 wi ft. at fr" depth
Stwm Stnrage Prodided = 667 cu ft, at 8" ttepth Q= G' I• A= 4.23 C.F.S.
BOWSTRINC3 CALCULATIOh15
01 97 03 g4 #5 46 #7 N4IMBER and TYPE cr1 pRYWElLS PRQP[}SED
Time Time Rntensdy Q tfav. V irs V auS 5farage
Prsarmrl IncrmrR 1 5ingtcA3srtel (Spokane Cauriiy Type A)
' (min ) (sa+c ) ['inlfir] {0fs) {cai 8.) (cu. fl.) (cu. ft,) 0 DoChle-Bsrral (Spokane Courrty TYQe H)
WW1 fA'C"!61 (aAf'lta) 195461
5.0D 3oa.OD 318 9.ia 495 90.D0 aas Ounnnw Provuled 8 3 c.f.s.
5 300 318 723 495 90 406
10 803 2.24 0.87 609 19U 429
75 90U 1 i'7 0.69 687 270 417
24 1200 9 45 0,56 731 360 371
29 15ao 1.29 047 761 450 309 '2[f8° TRFATTNEhET VC3Lf RwIEE
30 18w 1.04 040 7B8 540 225
35 2100 0,91 035 776 630 146 Required G P.A. ponding v[slurrte.
40 2400 0 82 0 32 70 720 75 lmperviaus'2DA" Area x 112" = 457 sxi R.
45 2704 074 029 SQ3 840 -7 wlurrepumkied at 6' depth = 480 r.u ft
50 3004 0.68 026 817 gm -83 OC1
55 330D 0.64 0.25 643 99f1 -147
60 36DD 0.61 0,24 675 1080 -285
65 3900 0.60 0.23 93D 1470 -240
70 4201 0.58 4.Z2 967 1260 -293
75 4500 O.58 1722 998 135+0 -352 S;OR6A STOiL4GE VOkllNiE
84 4800 GS3 0~21 4006 1444 -434
85 5100 0 52 0.10 1D48 1530 -483 AAawmum starage requuad a 429 cu ft
90 5400 o.50 019 4066 1620 -554 valume prowdsd at 8' depth = 667 ou ft.
95 5700 0.49 8.19 310'1 1770 -609 OKI
100 6ODD 0 48 019 1'!35 1800 4S65
Stmpaon F.ngineeM tne. M Nar8h angenne Road, Sgnkana, iyA 99212 (589) 926-1322
anuebu.ft- aansa
II. STORMWATER DRA.LNAGE CALCiJLATIONS: (continued)
Basio B (continued)
Curb Oneniniz at Low Point, Sta. 14+08, right, 20'h Avenue
h= 8 in. = 0.67 ft. Tota1 height of opening
H= 0.176 ft. Depth of water at entrance
Q= 1.23 cfs Total peak rate of flow
Q= 3.087(L)(M312 for H/h < 1, 0 176/0.67 = 0.26 < 1
L= Q=(3.087)(H)32 = 1.23 =(3 087)(0.176)312 = 5.40 ft.
Construct Curb Opening; 8 ft. wide, 8 in. deep
Use 2 Spokane County Type-2 Curb Inlets; 2@ 4' = 8'
II. ST[]RMVVATER URAINAGE CALCi]I,ATTON5 (continued)
Sasin C
Area
'I'otal = 10,059 sq. ft. - 0 231 acre
Favement = pioneer 5t. =Sta. 15+27 tv 19+30 = 7,444 sq. ft. - 0.171 acre
Driueways = 0driveways at 1,I100 sq+ ft.Ahouse = 0 sc} ft. - 0.000 acre
impervivus =0 + 7,444 sq. ft. - 4 171 acre
GrasS Lawns = 10,fl59 sq. ft. -?,444 sq. ft= 2,615 sq. ft. - 0.060 acre
Storaae Reauired
a} "208" Starage Required _{7,444 sq. ft- }(1f2"-12 in. per ft.) = 310 cu ft.
b) Bowstriiag =118 cu. ft. +~Single Banrei Drywe11, Type A(0.3 cfs vut)
Tatal Storage Provided•
Fond, 6" deep; (9)(60)(0.5') + (9+60+9+60)(4.375 ft.) _ 322 cu. ft. ] 310
Pana, s53 deePa (9)(60)(0-67') + (9+60+9+60)(0 67 ft.2) _ 454 cu. ft. > 118
60°
(}S 93
7
6l//'7
~c 2.0LJ LL ~
tI. 15 ft _I
3:1 5"=0.5 ft. 8"=067 ft 3:1
(1/2)(15)(0 s°) = 0 37s 5q.ft. (1/2)(2.00')(0 67°) = 0 67 sq+ ft.
DS'fENTIQN $A51N DE51[3N; FtAT[C)NRL FORN{ULA HY[7RQLC#iY 8 BOWSTRING METMC7D
DRAIA1RGE &ASIN ANALYSiS ivr 10 YfJlR STDRM EVEtdT
Date 5= Prnject Name: Ruigemartt Estates #4 - 7th Addition
- Jah Na 13714 Praject Lccation. 21st CouA and Pinrieer
Cesq]ner 3 Toung f}re:rfage Basin Name Basin C
ChskLhr P'Projects'draucr.ak.13714 G[airtage Barin Descssptmsl: f)nsite
Filenarrre s 375ac-'ds ZOS' Panding Rrea Name °C"
For Ridgemant Es=s Pnnding Araa Localion- East sida af Fionser
Pairt af Cans:erttreleon. 51a 15+66. Rt-
SUBAF3E45 71A+1E OF 00t4CENTR4T1ald (Tc), m'srsuses
EescnAtum Acres C ASC Dverlartd Fhm CFassnel Flow
[r 1 u8 208"Areas: Sa{Mllf IL' L2 p 372
Aspha@ Pavemsnt 0.971 0.90 4.154 L'C 4 015 Z1 ~ 0172
prwev-ys @ OD13 020 O.tH10 L1 (A) a 10 Z2 = 3$
~C',rsss Lawn 0.05Q 015 0.DD9 N(A) a 04 B R 0
S(A) = 0.41 n = 4.015
OUmrAtm., Tc (H) = 1.37 s= 17.045
d = 01104
S~mant B.
L1(B) ° 6 Ta (ch.) 2.31)
N(B) = 0 Tc{A+9] 137
a 0 TC S[d61 5 00
Tc (B) ~ 00 Intensft = 3,18
Tiote9 Basm Area, acres = 0.231
Cosrsposite Rurtnff Caeffmiert! ~ 0 71
Cosn6inef (Hrea ' Runoff Cnefficient) = 0.163 L} (estienaYed @ d) _ 052 a.f.s
T`ime a! Cancerdretion ¢ 6.00 mmutes
`208' DRAfNAGE PARRMESERS
Irrtpe[ui4us "2Q8" PMD 0 7,444 sq. ft. PEAlC DISCHARGE, 40 YEAR $TORiN
'2[]8' Volums Provided = 322 cu. ft, at S' depth
Stortn 5torege Prwnded = 454 cu+ ft. at 6" d5pth Q= C" I' A g 0.42 C.F.S.
B4WSTRING CAiCLlLATI[IN5
111 92 03 94 #6 *7 VsEUMBER erd 7YPE of DFfYVYELLS PRDPOS€D
Trre Tirre lrEtensily Gk dev. V in V nut Siaraee
trw7mrn Incrmni 1 Single-9arrel (Spofmne Caurdy 7ype A)
(min.) (ss~.} (n.mr) [oft) (cu. ft ) (cu. R ) gcu. ft ) 0 Dauhta-8arrel (&pokane GaunEy Type
[~1~1 iA'CV31 [Zdvz tM1t8i
5.00 3Um OOh 318 0.52 208 90.00 118 Dutflow Pravided• 03 c f.s.
s aw 3.18 0.52 208 90 tita
10 ~ 2.24 036 xss iso 76
2s sDO 1.77 029 zss 270 is
- zo 1200 1.45 024 308 3m -sa
as 1500 1.21 azn 316 aso -134 -208-rRF-aaTnnEn3r ~~LUIVE
30 laaa 1.04 0.17 322 saa -218
35 2900 0.81 4.15 328 83Q 304 Required G PA. pond'srtg volume:
AO 2400 0.82 0.13 334 720 388 EmFHrvioua Z48' keax#~`1' = 310 cu. R.
45 27M 014 0.12 338 810 472 Wusrre pmwdsd af 8' slapth = 322 su+ ft
50 3DOO 4.68 011 344 wo 556 O(!
55 33pL3 0.64 0.10 365 9w _G35
60 36i34 0.61 0.10 389 1080 =772
65 39d 0.80 8.10 391 1470 -779
70 4200 0.58 0.09 40S 9260 -854
iS 9500 0.56 0.09 420 1350 -93[] STC3RM STaRAGE VOLllRAE
80 ASQD 0.53 0.09 423 7440 •1017
&5 5100 0.52 0.08 441 1530 -1069 Mmimum starage required e 11$ r.u. fl
90 5400 0.50 00$ 448 1620 •1172 voturt4e provkted at 8" dapth = 454 cu. fl
9.5 5100 0.49 U.08 4E3 1710 -12*17 bK!
1DD 600D 0.46 4.08 477 9OW -1323
sdmpsa,r EngraPe,rs liec- 909 uo,th ,a,gonne RasQ spokane, wa 99212 {Wgj 926-732.2
13714cxe- aql~ s
H. STQRMWATER I}RAINAGE CALCiTLATIGNS: (contanued)
$asin C
Curb Oneninia at Low Poirrt. Sta 15+66, 18' right, Pavaneer 5t.
h= Sin =0.67 ft. Tvtal height of crpening
H = 0 104 ft. Depth of water at entrance
- Q = 4 52 cfs Total peak rate af flow
Q= 3 OS?(L)W fbr H/h<1, 0. ] 041q.67 = D.1 f<l
L = Q (3.087)(H)3' = o 52 = (3 087){0.104~' = s 42 ft
Construct Curb Opening; 6 ft. vvide, 8 in. deep
II. STORMWATER DRATNAGE CALCULATIONS: (continued)
Basin D
Area
Tota1= 91,064 sq. ft. - 2.095 acre
Pavement = 21 st Court = Sta. 5+05 to 9+82 = 10,3 52.5 sq. ft.
Pioneer St = Sta. 15+27 to 16+78 = 2.718 s4. ft.
_ 13,070.5 sq. ft. - 0.3001 acre
Driveways = 6.5 driveways at 1,000 sq. ft./house = 6,500 sq. ft. - 0.1492 acre
Roofs = 6.5 roofs at 2,000 sq. ft./house = 13,000 sq. ft. - 0.2984 acre
Impervious = 13,070.5 sq. ft. + 6,500 sq. ft. + 13,000 sq. ft. = 32,570.5 sq. ft. - 0.7477 acre
Grass Lawns = 91,064 sq. ft. - 32,570.5 sq. ft. = 58,493.5 sq. ft. - 1.3428 aGre
StoraQe Reauired:
a) "208" Storage Required =(13,070.5 sq. ft. )(1/2"=12 in. per ft.) = 545 cu. ft.
b) Bowstring = 742 cu. ft. + 1 Double Barrel Drywell, Type B
+ 1 Single Barrel Drywell, Type A(1.3 cfs out)
Storaee Reauired:
Pond, 6" deep; (12)(91)(0.5') +(12+91+12+91)(0.375 ft.2) = 623 cu. ft. > 545
Pond, S" deep; (12)(91)(0.67') +(12+91+12+91)(0.67 ft.) = 869 cu. ft. > 742
91' 12' Pond 12'
91'
2.00 ft.
i, 1.5 ft.
,3:1 6"=0.5ft. 8"=0.67ft. 3:1
,
(1/2)(1 5')(0.5') = 0.375 sq.ft. (1/2)(2.00')(0.67') = 0.67 sq. ft.
DETENTION BASIN DESIGN. RATIONAL FORMULA HYDROIOGY 8 BOWSTRING METHOD
DRAINAGE BASIN ANALYSIS (or 10 YEAR STORM EVENT
pate 53100 PtoJect Name: Ridgemont Estates 04 - 7th Adddion
Job No: 13714 Project Location 21st Court and Pioneer
Designer J Young Dralnage Basin Name: Basin O
Ofsk Dir. P Projects drainca1c.113714 Drainage Besln Description: Onsfle
Flename• 13714D xls '208' Portding Area Name: "D"
For RidgemoM Estates Ponding Area Locatwn Wesf side of Pioneer
PoiM af Cortcentration Sta 15+66, Lft.
SUBAREAS TIME OF CONCENTRATION (Tc). minutes
Descnption Acres C A'C Overland Flow Channel Flow
Liaggodgus 208' areas: S8~lpent A; L2 = 575
Asphall Pavement 0.300 0.90 0270 Cl = 0.15 Z1 = 0.172
Driveways 0.149 0.90 0.134 L1(A) m 100 Z2 = 36
JJodevelopedJaa~L ~i r a Js 1.343 0.15 0.201 N(A) = 0.3 B. 0
Roo{$ 0 298 0 90 0.269 S(A) = 0.0054 n= 0.016
Tc (A) = 5 53 s= 0 0242
PItserA S. d = 0199
~nt B
L7 (B) = 0 Tc (ch.) 3 14
N(8) Q 0 Tc(A+B) 5.53
S(8) a 0 Tc total 8.67
Tc (B) = 0.0 Irttensity ~ 2.49
Total Basin Area, ecres = 2.091
Compasite RunOfl Coefticient = 0.42
Combined (Area ` Runoff Coei(icleM) = 0.874 Q(eslimaled @ t) ° 2.18 c.t.s.
Time of Concentra8on = 8.67 minutes
"208' DRAINAGE PARAMETERS
Impervious "208" Area ° 13,070 sq. fl. PEAK DISCHARGE. 10 YEAR STORM
'208' VolUme Provided = 623 CU. R. et 6" dBpth
Stortn Storege Provlded = 869 cu. fl. at 8' deplh Q= C• I' A o 218 C.F.S.
BOWSTRING CALCULATIONS
ti1 92 A3 qq #5 gg g7 NUMBER end TYPE oi DRYWELLS PROPOSED
Time Time Urtensfry a dev. V in V out Storage
Incrmnt. Incrmnt. 1 Single-Barce! (Spokane County Type A)
(min ) (sec.) (nJho (cfa) (cu. fl.) (cu. H.) (cu. ft.) 1 Qoublo-Bartel (Spokane County Type B)
(r1160) w'clm) toun*#21 (asrs)
8.67 520.33 2 49 2.18 7518 676.43 841 Outtlow Provided: 1.3 c1s.
6 300 3.18 2.78 1118 390 728
10 600 2.24 7.96 1522 780 742
15 900 177 155 1667 1170 497
20 1200 1.45 1.27 1746 1560 186
25 1500 1.21 106 1774 1950 -176 '208' TREATMENT VOLUME
30 1800 1.04 0.91 1798 2340 -542
35 2100 0.91 0 80 1812 2730 -918 Reqwred G.P.A. ponding volume:
40 2400 0.82 0.72 1848 3120 -1272 Impervious "208' Area x 1/2' = 545 cu. N.
45 2700 0.74 0.65 1881 3510 -7649 volume provided et 6' depth = 623 cu, ft.
50 3000 0.68 0 59 1889 3900 -2011 OKI
55 3300 0 64 0 56 1946 4290 -2344
60 3600 0.61 0.53 2014 4680 -2866
65 3900 0.60 0.52 2139 5070 -2931
70 4200 0 58 0.51 2220 5460 -3240
75 4500 0.56 0.49 2290 5850 -3560 STORM STORAGE VOLUME
80 4800 0.53 0.46 2306 6240 -3934
85 5100 0.52 0.45 2399 6630 -4231 Mawmum storege required = 742 ou. ft.
90 5400 0.50 0.44 2438 7020 -4582 wlume provided at 8' depfh = 869 cu. ft.
95 5700 0.49 0.43 2518 7410 -4892 OKI
100 6000 0.48 0 42 2592 7800 5208
S(mpson Englneers, Inc. 909 North Argonne Road, Spokane, WA 99212 (509) 926-1322
13714dm• ami,o
II. STORMWATER DRAINAGE CALCULATIONS: (continued)
Basin D
Curb OneninQ at Low Point, Sta. 15+66, 18' left, Pioneer St.
h= 8 in. = 0.67 ft. Total height of opening
H= 0.199 ft. Depth of water at entrance
Q= 2.18 cfs Total peak rate of flow
Q= 3.087(L)(H)3n for H/h < l, 0.199/0.67 = 0.30 < l
L = Q = (3.087)(Ei)32 = 2.18 = (3.087)(0.199)31 = 6.35 ft.
Construct Curb Opening; 7 ft. wide, 8 in. deep
H. RDAT3WAY SURFACING DESTGN:
' The Spvkane Cvunty A,.lternative Pavement Design (Ynterim) far Loeal Access Favement Structures was used for
des%n of the roadvaay suxfacing.
Frotn the table, Lacal Access F'avernent Structures, the following infarmafiion is needed to determuae the requued
surfacing tieptns.
1) The type of street must be lacal access.
2) 50i1 type (as classified by the United 5oi1 Classification System)
3) The average dai]y traffic, AUT
Street Tv=: Pioneer Street, and 21st Caurt are designated as ]oca] access (residential).
Soil Tvpe:
In accoardance with "Sail Survey, Spokane County, Washingtan" by L7nited States Department of Agriculture,
Sail Conservation Senrice, 1968, the soi1 found at the site is categarazed as:
GmB, Garrisora very grawelly laam, sirridar to Garrisvn gravelly loan-, except that the
sur-face layer is very gravelly.
Test holes were dug by 5unpsan Engineers, Inc. at the centerline intersectivn of Pianeer and 21' Gourt at the
Statian 16+78 for Pioneer Road. Another test hole vvas t€ug at the center of the cul-de-sac of 21' Caurt af fhe
Station 5+50. 'T'he test holes were dug to a depth of appraximately 12 i,nenes belvw subgrade. The sail sampPes
were tested by Strata Geotechnical EngineeriTZg. A sieve analysis was perfarmed by Sfirata on svil samples #X,
and #2. From the testing, the soil type was faund t❑ be aBrawn Silty Caravel, GM per [3nified Soil Classificatian
System. (See siewe analysis results included.)
Avera2e I]ailv Traffic, ADT.
Pioneer Raad vvall have average daily traffic counts af less than 200. Zx" Court will be cul-de-sac with an
average daily traffic cQUnt of less than 200.
- ❑esi2n:
From the table, 2 inches of asphalt cancrete pavement over 6 inches of crushed surfacing
is required £or 1'ianeer Road.
Froan the tabIe, 2 iriches of asphalt concrete pavement aver 5 inches of crushed surfacing
is planned fvr 21' Court.
_ ~ .
~
S i R a i a
GEOTECFENICAL EN01HEEf11NG S MATEAIALS TESTING
-
162ON Nlamar PC, Binldirtg C Suite 500 SgakOna WA 9324fi
505891-1904 I FaFC5M 999-2052 1 e-madstraf54k@teacom
May 24, 1999
, - Ciient No. SD~ENG
Project No. S990426-1
Reference No.: 5LO5201
Nir. Kezriu McMuilcin
Siznpson Engineers, Tnc.
N. 909 Argome Road
Spokane, WA 99212
Project: Nidgemont Estates No. 4 7`h Adciition
pate Received: May 12, 1999
l7ate Tested: May 13, 1999
i3escription: Brown Silty GRAVEL
Lacativn: 21"Court Gul-X7e-Sac, Sample 41
SfEVE SIZE I % PASSING ~ SPECS
P
.}.Vi ~ 100
~ 1 ~ 59
Y .F ~ 49 ~
3/,T7 ' 46 ~
$ 38 ~
~ 318" r 35 ~
Na.4 ~ 27
No.B ~ 20
~ Na.1G ~ 14 f
Na.30 12 ~
No. SO 11 I
~
No. 100 ~ 10
~ No. 200 ~ 83 1 ~
Sincerely,
STRATA, INC.
a
Rzck Woodwvrth
Testing Sen+iees Manager
PJW:cm
Ipnhp - 6YASHINGTOPJ OREG6N I:+r01AiNG • 3AGNTANA + IJTAH - NEVApA
t
S r R a i a
GEpTECHPeICAL EKG[NEERING 8 MA7EFlIAL5 TE5TlNG
~
_ 5620 N iVlarner Rd Suilc[irgC Swte 300 Saokaris, WA p9276
5E79 899-1904 1 Fax 509 891-2012 1 e-mail suarspkQea com
iVl[1'y E4= 1777
Client No. SIl'vENG
- Froject No. S990026-1
R.eference Na.: 5LO524 1
Mr. Ke`rin. McMulkin
Sunps4n Engineers, Inc.
N. 909 Argonn,e Road
Spoi~'ie, WA 99212
Froject: Ridgemont Estates No. 4 7`b Addition
Date Received: May 12,1999
Date Tested: May 13, 1999
Descriptimn: Brawa Silty [7RAVEL with CobbPes
Lacation: Iartersection vf Pioneer Road and 2 'l" Gvurt, Sample #2
~ SIEVE SIZE ~ °/o pASSING ~ SPECS
~ 5.0" 140 ~
~ 4.0" 86 ~ I
~ 3.4" 86 ~
~ I Y"" 76
I
~
~ 1.0" 62
314" ~ 54
11Z" ~ 44
318" ~ 39
No.4 ~ 29 f ~
- No. 8 ~ 23 ~
No. 16 ~ ~
No. 30 ] 9 I
~ No. 50 18 I
~ 'No. Y oo ~ 17 I
~ No. 200 ~ 14.9
Sincerely,
STR.ATA, TNC.
Rick woodwnrth
Testing Services IVlanager
RJ1v:crn
IpAH9 • WAS}iINGiC7N • OFEGpN • 1,1JY01.'iYu - ki(]NiANA • fJ7AH - NEYRpA
LOCA,L A,CCESS PAU'EMENfi STRUCTURES
AVERAGE dAILY TRAFFiG
SOiL TYPE co - ~QO) 200-600 604 +
GW 2"/6" . 211/611 2176s'
G P 2176" 217711 2„/7"
- GM ri/611) 2„~~, 2"1811
GC 2111711 211f811 3111611
SW 2"1611 211/7,p 21117tr
5P 2111611 2t7711 219/BFI
SM 2111711 2„18rt :3176"
Sc Pavement Design
ML 311j611 3"181, 4"16f,
GE. Pavement Design
OL 4If j~JF4 5111710 5I1j~]II
~
MH Pavement []esign
(}y Pavement ❑es€gn
PT Pavement Deszgn
1} 5oi3 type is ciassified by the Unified Sail Classifiicatian System.
2) RequPred #hickness is given as inches af asphaft concrete pavement over
inches of crushed surfacing.
SPOKANE COUNTY ALTERNAT'E PAVEMENT DESIGN
([[vTERIM} .
Try a depth af 1. 2' 4-4. 1 Dx7relis - Precast cflncrete dry_
wells, as shasaa on County staadard
213 dra~rrings, ma~r Fe used. to retain stos=
` V~~ .486 R 5 1/2 R= A~~a drainage in s~ils with a very rapzd per-
a Wetted per_meter meability. 'Iypes A a.nd B Drywe? Is iaz
the fa~.]~awing soiZs may he desigased Eo
~ Z'x1,.2'~{~~.•~.'~~-.2} " 5.~$ s.f. infiltrate a rate of flow of 0.3 c-Fs azzd
2 +2(]..22+2.42) 7.36 ft. 1.0 efs zespectively:
Hong A~.arbIe
R - .7I7 Bonner Fhaebe
Garrisa ~ Springdale
a.~
V - 1.486 (.717) 2/3 (.OZ) ~ 5.61 fps The Iocations ❑f Chese sail types are
.0 $howa in Che Soil Coaseriation 5erviee
Soi~. Saraey for 5na3~caae Cauatp. The
r~ = VA = 5. &3, f~s x 5. ~8 sf b c~s drai.aage repard shall iaclude a ccpy nf
. the 5C5 map wf.th the subdivisicaa piotted
= 30 cfs d- 1.2' ;;hereoa. Tie County Eagi:zeer shail re-
quire the develcaper CQ provide a sieve
Salve Dc: Try 1.3' analysis aad sail type tesz £ram a saiIs
Iaboratory acceptahle to the County Ea-
Q~ ~ g (b +i F}c)3 D, 312 giaeer if there is a quesCion regarding
b + 2: Dc ehe abave saiI tyges.
312 In rural a.reas, as derined ia Spokane
~-432.2 (2+2~a.3)3 x 1.3 - 30.9 cfs County Rr.iad Standard.s, apen gravel dry..
{2}2x2_X7..3) uells may be permitted in lieu az the
, precast csanerete drp~we?ls.
~ 1.3' .
3~).9 cfs - 30 efs dr
Preea.st cnncrete dryae?Ls proposed for
DC ~ D~, f1.ow ~s supercri~ic~,. use in aCher sail.s thaii thase shcwn
above aad aI.], open grave3 drywel1s shall
Since the flaw is supercritieal, care
e ~esigaed aceo~d~ng t❑ perc~l~t~on
b
s hou3d be talcen Crs provis3e a p~'opes de- ~a~es cfetersai~ed ~y a~{ ~3d tes t cca-
sign ar paints wnere harizanta~. andlar farming tc~ the Ha~sua~. af 5eptir. rank
ver'Ci~a1. align~~c change. practice. A County iuspector shall be
present duriag a1~, percolat~,an eests. A
A fre~ h~ard a~ .30~ ~hrau~~ be appl~e~ percoIation test calcuIatian sheeC
Dm .30 x 1, 2= 1.55' signeci and sealed by a registersd civil
engineer shalI be suhm.itted. 'ibe per-
V= S. b fps 5=.,.xJ,= alIawable. colacifln rate $ha1.l be eqvsal td cr
greater than 72 inches per haur ta be
aczeptabIe for dr7welZ canstzuctian.
Provide rig rap. (Refer to Sectian
4.5. ) 4-4.2 5torage Facilities - Deteneion ~
s~arage facfl~.~fes may be used tn
4-4 IerencionlRe'~entifln 5ysteffis ~~e ~egulata fIow rates_ An ov+erfZaw
peaic rate of rtut-sff fzom an existing =ype starage system wEiich regv3aces the
site sha31 noG. be increased due tv the rate of outfiow sha1l be used. See
proposed deve-I.opment far a giaen design. Pigures 4-3, 4-4, 4-5, and 4-5 far
seorm. 'Ilzerefore, aretenttiaalaeLen- suggesteri detai.ls. 'Fandscaped fac-41-
tioa faci3 ity an-si te railI 6e required. ities such a.s parks, gIay£ields, teanis
- caurts, etr. are recommended far
Date: 4/41$4
4-15
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SlJ~'iAF;EA 1 = 11.2 ACRES ~ ~'-aURAREA 1 RUNOFF ' CU-'iuE-'NUi"IREF{ 71 ° _
-
TqTAL AREA = 11 s2 ACRES COMF'OSI TE GURVE NLJMBER = 71.00
.EsASIN Y hvfiUT DATA
. RwlNFALL ~ 2.6 i1'JGHES ~ ~C) ''(F~'K i p-N'[ • s
~ HYDRAUl.. IC LEkEC TH = 600 FEET
• WATERSFiEb SLOPE = 4 PERCE!rET s
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CF`iLCIJLhTtD iJALUES
S
.54 I:4CE--iES
LAG - a 1=y~ HOURS
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I]ATE = 7,I20I92 ' DESiGiVE; = k' W MGh1ULi'IN bASIN "A"
Pi;i7JECT ;JAME = RII3GEMONT JTH AL1D iT I❑N
I7ESCFt I F''T` IOfV ~ 5TC]RMWRTER DRAINflGE
SLJBAREA 1=.34 ACRES SUBAr EA 1RUNC3FF GOEFFIC I ENT = .9
SUBAREA 2 _ .24 s;CRES SUBAREM ? RUNOFr- CDEFF IC IENT = .15
TOTAL AREA = .53 RGRCS COMF'OS I TE RUiVaFF GOEFF IG TENT = a589655172414
C3wER6.eAfVlb FL[]Vd V-F'iLUES
Ct = .15
L = -=s 5
N = .4
5 - .0J,
CHAN6i'•IEL FLOW wALl..lES
L. - _7 5 8
Z1 =
Z= - . 1i^
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b - 0
S .021
TD = .149.2.
C:CINFI.lTE13 UF1LC,iES
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11 CF - 7. ()a
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Li A 1.r=5J
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a
l
C BOIiJSTR I PdG CALCULAT I ONS ~
DATF =3i 20! ?'2 ' DES I GPdEF = K W MCMULKI rl BAS I CJ "A"
F'FOJELT NAME = R i DGEM(]nIT 5TH RDD I T I OPI
DESCRI F'T I OPJ = STOFiMUJATER BnA I NAGE
t t Intensi ty C!dev. Vi n Uout Stor-age
(min, ) (sec. ) (in.lhr. ) (c.f.s. ) (cu. ft. ) (cu. ft. ) (cu. ft. )
5.0 'f 1(_1 3.18 1. 09 437 90 +47
5.4 ~c 327 3.08 1.05 461 98 363
10.0 ISQI_I 2.24 .77 545 181_I 365
15.0 900 1.77 .61 612 270 342
20.0 120I1 1.45 .50 650 360 270
25.0 1500 1.21 .41 667 450 217
10.0 1 s1►C} ' 1.04 .36 680 540 1+0
w5o 0 2100 .91 .31 6^08 6=0 5B
40.0 2400 .82 .28 704 720 -1 6
45.0 2700 .74 ..'_5 711 ^olt; -99
50.0 . ;00O .68 .23 724 900 -176
55.0 3100 .64 .22 747 990 -243
60.0 3600 .61 .21 774 1080 -10b
65.0 390C-i .60 .20 816 1170 -354
70.0 4200 .58 .20 S;J i 1260 -405
75.0 4500 .56 .19 075 1350 -Y% J
80.0 4800 .53 .18 ^070 1440 -550
85 .0 5100 .52 .18 918 1500 -61 2
90.0 5400 .50 .17 942 1620 -678
95.0 5700 .49 .17 974 1710 -7Z6
100.0 6000 .48 .16 1003 1800 -797
THE MAX Ih1UM STOrAGE IS 0b4. i9b?=8391 CU. FT.
* The ti me o-F concentrati on i s 5.44843 mi nutes.
The Undeveloped flow aut is .T c.f.s.
~
TCP! Y1=A1; STORM C:ALC I
Hemmings, Bill
From: Herrtmings, Bill
5ent: Manday, May 22, 2000 2:42 PM
Ta: 'Ooug Christensan'
SubJeGt: R 1423F - Ricigemant esEates No. 4- 7th Additian
5-22-0fl
I recei►red the plans for the abflve referenced praject Qn May 9, 2000. Here are my rev+ew commen#s:
• It appears that the sidewalk areas were not irrcluded 'm the ampervious area r.afculativns. 5ince they are
directly cannecied ta the pavement they shnuld bs counted PEeass revise and resubmit.✓ -
. The off5ite berm ean not be built w~.hout an easement. Please pro~de easement or mnve the herm onto the
plat and put intv an easement.
■ Lv# plans will need revision rf #he abowe two items are r.ampleted."/
• There needs to be a ealculatian of the contribution to the Sullivan Road project for the cost af the
imprQVements that were required along this frontage A check forthese impcavements shauld be mcl ded
wrth the ne)t submrtkal. Unit cvnts are avadiable fram Gary NeVson for this projecf~
If you have any questians, please c.all me '
Bill Hemmings, PE
Page 1
ST~RMWATER DRAINAGE CALCULATIC3NS
FOR
~~~MONT EST'ATES NQ. 4 - 7TH A13DTTION
NW 114 of Sec. 25, T. 25 N., R. 44 E. W.M
Spvkane County, Washington
Aptil 2$, 2000
~~JUiC DDCUME41'
~GtW~E, ~`.r ~FqCE
~,-.s-,~',~i~ i~":Lf~il Y E
~ ~ P ~ was
~~1 ► repared by:
pp
,,Oj~cT 0
s`°"~~nTTAL " Sinpsvn EngineersTnc.
F?N TO COUi~TY El~G36~~ER ~
~Torrth 909 Argmnne Rvad 9~~, 5
Spokane, Washington 99212 ~ EXPIREs '--71171 n r ~
The desig,n unproveanen#s shovvn in this seE nf pians r.onfonn tfl
the applicabie editions af the Sp+skane County standards fbr
road and sewer constructian and Spokane Couuty guidelines far
stormwa#er managemerd. A]1 design deviatian,s have teeri
appmued by the Spokane Cout►ty Engineer I approve these
plans for cvnstructian
1. SUIZ7mary
II. Stormwater I]rainage Ca.lculatiQns for Basins A1, A2, B, C, and D
af Ridgeririant Estates Na. 4- 7thh Additian
IIx. Attachments:
* Roadwa.y Surfa.cing Design
* Soils Map and Tables
* Ridgemant Estates No. 4 - 4~' Add,, C)£fsite drainage map and calculativns
* Ridgemont Estates No. 4- 5`hAdd.; Ilrainage calculatiaras
RECEIVED
P.tYrv3eds-113714113714-208 doc MAY 0 9 2006
SPOKk,IE COM!' ENGIfVCEFi
Stormwater Drainage Report; Ridgemont Estates Number 4-7th Addition
1. SLJMMARY:
The development is divided into four (4) basins; A, B, C, and D. See Drainage Map for Ridgemont Estates No.
4-7th Addition. Each basin is comgosed of two subareas; 1) grass lawns, and 2) impervious roofs, driveways,
and asphalt paved streets. Stormwater flows overland across roofs, grass lawns, and driveways and into grass
drainage ponds. Stormwater from asphalt streets flows along the curb gutters and into the gass drainage ponds
through curb openings.
The grass percolation areas (drainage ponds) were calculated to hold the first 1/2" of rainfall runoff over the
asphalt street areas.
Figure 2, page 6-3, of the "Guidelines for Stormwater Managemem", by Spokane County Engineers, was used
for rainfall intensity and duration occurring at a 10-year storm frequency.
The Rarional and Bowstring Methods were used to calculate the peak stormwater runoff for each basin, and the
type and number of drywells needed for each basin based on the storage capacity of the pond.
In accordance with "Soil Survey, Spokane County, Washington", 1968, the soil is categorized as:
GmB, Garrison very gravelly loam, similar to Garrison gravelly loam, except that the
surface layer is very gravelly.
Camments:
For Ridgemont Estates No. 4- 4h Addition, an earth berm was constructed along the west plat line (east R/W
of Pioneer Street). This was done to prevent offsite runoff from flowing onto R.E. No. 4- 4h Addition. { See
offsite drainage map (Basin V) done in 1992 for R.E. No.4 - 4I' Addition. } The offsite runoff is ponded
behind the existing earth berm. With the addition of Ridgemont Estates No. 4- 70' Addition, a portion of the
earth berm will be relocated to the south plat line of R.E. No. 4- 7th Addition to prevent offsite runoff fram
flowing onto RE. No. 4- 7`h Addition.
Originally, Pioneer Street was going to extend from Sta. 11+58, but Grace Harvest Church purchased this
properiy south of R.E. No. 4-7`b Addition, and it appears that Pioneer Street will not be extended. Grace
Ha.rvest Chwch will be responsible for stormwater considerations south of R.E. No. 4- 7" Addirion.
The pond in Basin B was originally constructed to collect runoff from 20th Avenue (Basin A) of R.E. No. 4-
5`h Addition. This pond will now be enlarged to accommodate a small amount of additional runoff from
Pioneer Street.
II STORMWATER DRAINAGE CALCULATIONS:
Basin A-1
Area
Total = 94,506 sq. ft. - 2.170 acre
Pavement = 21 st Court = Sta. 5+05 to 7+95 = 6,895 sq. ft. - 0. ] 583 acre
Driveways = 4 1/2 driveways at 1,000 sq. ft./house = 4,500 sq. ft. - 0.1033 acre
Roofs = 8 1/2 roofs at 2,000 sq. ft./house = 17,000 sq. ft. - 0.3903 acre
Impervious = 6,895 sq. ft. + 4,500 sq. ft. + 17,000 sq. ft= 28,395 sq. ft. - 0.6519 acre
Grass Lawns = 94,506 sq. ft. - 28,395 sq. ft. = 66,111 sq. ft. - 1.5177 acre
Storase Reauired:
a) "208" Storage Required =(6,895 sy. ft. )(1 /2"=12 in. per ft.) = 287 cu. ft.
b) Bowstring = 441 cu. ft. + 2 Double Barrel Drywell, Type B(2.0 cfs out)
Storaee Provided:
Pond, 6" deep; (20')(30')(0.5') +(20+30+20+30)(0.375 ft.2) = 337 cu. ft. > 287
Pond, 8" deep; (20')(30')(0.67') +(20+30+20+30)(0.67 ft.2) = 469 cu. ft. > 441
30'
20' 20'
zn°
2.00 ft.
1.5 ft. _i
- - - - - - - - - -
3:1 6"=0.5 ft. 8"=0.67ft. 3:1
,
(1/2)(1.5')(0.5') = 0.375 sq.ft (1/2)(2.00')(0.67') = 0.67 sq. ft.
~ OETEfV71AN BRSIN DIESlGA1: RATkQIVAL Ffl9DAS1LA FIYQROLOGY & B[}WSTRINC3 METHOD
pRA14+fAC3E BASIN ANALYSIS for 1a YFpR STORM EVENTi
Oete 51" Presject Name: Rrdgemnnt Estatas #4 - 7th Adddion
Sc,bAla 53714 Project Locatioro. 21s1 CouFt and Pionear
E3esgner J Young Draiaaga 6asin f+lame: Baain A1
❑isk Dr P Projecls drairxalc 13714 Qrainage Basm pesedptlon: C3nsite
Filename 13714a'# xls "208" Pondirg Area hlame. "A1"
For Ridgerrwnt Fstates Ponding Area Locatinn: Nodh side ef 21&t Couri
Pomt of Cortcaentretian Larr Pt, 7+95, tfl
SilBAREAS ?1ME ❑F CDNCEPITRATtDN CTc1, minutes
Qesr.riplion Acres G A'C Dverland Flcsw Channel Ffaw
fILmerafaus '208"Aree& Aewmt A- L2 ° 258
Asphalf Pavement 0158 0.90 0142 Cl = 0.15 Zi = Q 172
Dpvewap 4103 0.90 0.093 L1 (A) = 245 Z2 ~ 38
G rm Lam 15i8 0.15 oaza N(A) _ 04 8a Q
Raais 0390 0.90 0.351 S(A] = d.054 n= 6 016
Tc (A) = 5 64 s= 0 027
ONrer'Aroas. d = 0199
Snnsnf B.
L1 {6} = B TC tGll 3 134
N(B) = p TG(A+8) 5.64
S(B) g U Tc total 697
Tc (B) ~ 0.4 Irdensiiyr = 281
7ofal Basln Area, acres ~ 2170
ConPosMe Runaff CceftialeM n 0Z8
Cam6ined Wee` Runoft Coefficient} = 6 814 ❑(estimated @ d) a 2 29 c.f s
7ime of Gnneen![etlon R 6 97 mfnuies
'208' DRAINAGE PARRMETERS
Irr+pervms °20B° Area c 6.895 sq R. PEWC D{SCHARGE. 70 YEAR 8T0RM
"208" Valurne Provided a 337 cu at 6" depth
Starm 5tnrage Prorrided = 469 cu. ft. at 8" deplfi Cl = C' I' Aa 229 C.F.S.
BOWSTRINC [:ALCIiLRTEONS
1k1 #2 03 94 95 06 tFF NUMBER and TYPE of DRYWELLS PRRPflSEd ,
Time Tlsre lntensity Q dev. 11 in V aut Storaf]e
trECmint Incrntrn. t) Singfe-6arrel (5pokane Caunly Yype A)
(m9n ) {sec.) (inJkir] (cfs) (cau- ft•) (au ft) (cu. (1] 2 Iaauhle-Batre! (SpoIsana GouMy T+/pa B)
(a„w) fA'C'dF49 taar 14a cits-M
697 418.44 2 81 2.28 1283 836vB7 445 Ou[flow Rrovided: 2 c.f s.
5 300 318 2 59 1041 6m 441 70 ow 224 782 1354 9200 754
75 900 1.77 144 1562 18M -298
20 1200 145 1.18 1585 2400 -815
25 7500 121 0 99 1818 3DOO -1382 "208" T'FtEATMENT VCILLIME
30 18M 9.44 085 1645 3600 -1955
35 2100 091 074 1662 4700 -2538 Requised [3 PA ponding vnluma.
dd 2400 012 0 67 1698 46M -3182 Impervious "20B° Rrae x 112' g 287 su R.
45 2700 034 4.60 1713 5400 '7 valuma pruV+ded at B" depth m 337 r`u ft
5p 3000 0$8 055 1740 6004 -426D OKI
55 3300 064 052 1794 6600 -48M
6[f 36DO 0.81 060 1859 7200 -5341
65 39DQ 4.59 6 49 1975 78a0 ar82fi
lU 4201 058 0 47 24351 8400 -6349
i'S 4500 0,56 046 2117 9M -6883 STORM STORAGE V47LUME
80 48tl 0.53 0.43 2133 9fia4 -7467
86 5100 052 042 2220 1{]2D6 •7980 ARaxirnum storage required = 449 cu. ft
90 5440t1 050 041 2257 10BW -8543 voiume pronded at S" depfh = 485 cu, ft.
95 5700 049 090 2331 11400 -9069 b1C!
100 6000 048 4 39 2441 1200 -9599 .
Slmpevrr Ertglneera, 1nc. 09 Narth Argonne Rasd, Spokane, WA 90212 (5iJ8] 926-1322
faxrtEt ~e - enuy A1
11. sTQRMvvAT~~ DRAINAGE cA1.eUn.,ATTvnrs: (Continuea)
sasin A-1 (contrnued)
Curh Ot)ening on Continuaus Grade, 5ta 7+82, 7+95, and 8+08, 18' left, 211` Cnurt
a= 2 in. = 0.17 ft Flowline depressivn at opening
y= 0.188 ft. Depth of flovv in normal gutter
Q= 1 98 cfs Design discharge
Qa1La = 4.12 From Fig 16(a), page 6-39 "SpQkane Caunty Cruidelines for
5torrnwater Management"
L= Q'/(QafLa) = 1.9810 12= 16.50 ft.
Canstruc:t Spakane Gounty 'T`ype-l Curb Inlets, 3 cr 5.5' each =16 5 ft., 8 in. deep
DEPTH OF FLOW - y- FEET~y ¢ o.lBS
.01 .02 .03 .04 ~.05 06 -.08 .10 1.2 .3 .4 .S 6 .7 8 .9 1.0
1.0
~ ~T~ ~ ~ 1 ~ i •
I ~ I ;-i I I f~ j ` e
. --I- ~ -~-t- - -r-- ~ .s
- - j - -L- t--~ 4-1 ~-I-
~ 1 1 ~ jTi I .a
I ~
~ ~ ~ ~-}_T~ ~
~
I , I ll j
Q o
1 17-1 La
, I i ~ ~ ~ ~ I I I I ~ 1 yqti,~ ~ I I ~ I ~ I t I
. ~2
.io o
y
1.08
I I ~ ~ I~ I I I ti I ~ I' I ~ I I ~ ~.os
- ' ~ '
I .os
.oa
~ .03
J I
.02
i
~
~ ~ ~ I f i V l I i t i ~ I I i 1 I I ~ I t.oi
i.o
1 ~
~ ! I ' I
(a) DISCHARGE PER FOOT OF .6
LENGTH OF CURB OPENING ~ .17
-t
.s
INLETS WHEN INTERCEPTING
t~
100% OF GUTTER FLOW - ~-~--10
,4
o- L L L_~ ..G q
I I I I I
(b) PARTIAL INTERCEPT{ON [.3 Q°
RATIO FOR INLETS OF -~~i''~
LENGTH LESS THAN La
~---t--7
~i 00,
~
.10
'
.OS .06 .OB .10 .2 .3 .4 .S .B .8 1.0
L/L
$AS~h A- 1 a
CAPACITY OF CUR9 OPENING INLETS
ON CONTINUOUS GRADE
6-39 FIGURE 16
Bsasin A-Z
Area
Total =52,fi44 sq, ft. - 1.21 acre
Pavement = 21st Court = Sta. 7+95 ta 9+$2 =(187')(18') = 3,366 sq ft.
Pianeer St = Sta. 16+7$ to 19+44 ~ (265')(18') _4,788 sg. ft.
F>>iet (20')(20°) - (1/4)(7t)(20)2 86 so ft
8,240 sq. ft. - 0. 1892 acre -
I7riveways =2 driveways at 1,000 sq ft lhouse =2,00d sq. ft - 0.0459 acrre
Roofs _ 4 rvofs at 2,(]00 sq. ft.lhouse = 8,000 sq. ft. - 01837 acre
Impervious = 8,240 sq. ft. + 2,000 sq ft + 8,000 sq ft, = 18,240 sq. ft. - 0.4187 acre
- Crrass Lawns = 52,644 sq. ft. - 18,240 sq. ft = 34,404 sq. £t. - 0.7898 acre
Storap-e Reauired:
a} "208" 5tarage Required =(8,240 sq. ft )(112" -12 in. per f#.) = 343 cu. ft.
b) Bawstring = 333 cu. ft. + 1Dvuble Barrefl Urywell, Type B(l 0 cfs aut)
Storaee Pravided:
Pond, 6" deep; L(26')[20'] + (9){14} + (112)(9)(6)1(0.5')
+ (2(3+26+11+14+35)(0.375 ft.) = 376 cu, ft. > 343
PondY 8" deep; C(26')(20') + (9)(14) + (112)(9)(6)](0-67')
+ (20+26+11+14+35)(0.67 sq. ft.) ~ 522 cu, ft > 333
26' 9`
201 20' _
T
2+6' WIZ
2.00 ft.
;
xs~.~~
„
6" ~ L 5 ft- 8" 4 0.67 ft 3.1
1 36 7C 20 ft PC1i1d FlOoT `I
(1/2)(1.5')(0.5°) = 0.375 sq.ft. (1/2){2 00°)(o 67') = 0.67 sq, ft.
DETEN74Ci1J SA51N H)ESfGN RATtONAL FORAAULR 1-dYRROLO[iY & BQWSTRING METFEOLI
❑RP,INAGE BASIN RNALYSI5 for 10 rEAa sroR+n EVENr
Data 5l3= Pra]ect Name Risdgemont Estat$s 04 - 7th Addidon
Job Na 13714 Prnjact Locatian: 2W Court and Rianees
Domgner d Ywng Drairrags Basln Name: Basfn A2
Dsk Du PProje= drafnealc 13714 Cfrainage Basin Descliptian L7nsfie
F"nams 73714a2,)ds "20$° RQrding Area iltilame: "A2"
For Ridgemunt Fstatas Pondlrtg Area Locatian Nor11t slde oT 21 st Cnurt
Pnlrd oTGartc&nirafion Low ?I.. 8+46, Lfl
gU13ARF-p,S TIAAE OF CONCENTRATION [Tc], minutes
[ieseripfinn Acres C A`C Overland Flow Cltannsl Flow
LZDarvlaus "208'A5o,menf A. L2 ~ 225
Asphalt Pavemard 0.189 090 0170 CI a 0 45 Z1 a 0.172
Drtvsways 0 045 090 0 041 L1(A) = Q Z2 m 36
Rrass Lawn 0790 0.16 0198 N(A) _ 04 6 m [i
Roafs 0184 0.95 0.165 5(A) Q 4.054 n= 0016
Yc (A) = 400 s a 005
Othsr Areas: d 4 4154
Sfflrt 9.
i1(S) _ 0 TG [ah ] 1 02
N(B) g 0 Fc(A+B) 000
5(B) 0 0 Tc latal 500
Tc (E"i) - 04 Inteltsity= 318
Tatsl Besia Atea. $cres ~ 1209
Cumposke Runafi Coeffkient m 0 41
CaTn61ned (Rrea Runaff Coefflaleni) = 6.495 Q(estlmated @ d) = 1 58 c 1.s.
Fime oT CQrFCeiiEratior = 500 minutas
"208'ORAINAGE PARAMETERS
lmpervlaus "208" Rrea = 8,294 sq ft PEAK n18GHRRGE. 40 YERft $T@itM
'208' lfalurrePtavided a 376 cu, ti al 6" dapth
3tnrm Stnrage Rmvided a 522 Cu fl. a1 8" depth A aC"I"Aa 1.68 C.F.B_
Bt3WSTRINCi GAI.CI[LRT9QN5
a1 M2 03 94 95 #8 #7 P[LiMBER and T1'FE nf DRYWELLS PRUFO5ED
7ime Time Irrtansi[y 0 deir. V!rv V out Storega
tncrmnt 1wrmnt 0 SIngle-Barrel (Spokano Cssunty Type A)
{min.) [sm) 0nJht1 (a[s] (cu. fr.) [cu. [t) [cu ft ] 1 Double-6arref [SpoImna County 7ypre
(siNG) (a*cV3) (.nV21 (0"6)
500 300 OD 118 158 W3 3M.00 333 Oui{!ow Pmuidet. 1 c[ s
5 300 318 1.58 833 300 333
10 600 2.24 1 11 778 600 9 75
15 sm 177 0.88 873 9m -21
zo 1200 145 032 935 1200 -265
25 aSDO 121 0_60 960 1500 -saa 'zns` TREA7~'cHT Vf3LUA+FE
30 1800 1 04 052 980 1800 -1320
35 2100 091 045 983 2100 •1707 Requlrei G.P.R. pnnding voluma
40 24DU 0 82 041 1018 240D -1384 Impervinus "ZW Area x 1P2" m 343 cu. fl.
45 27Q4 9.74 037 1027 2700 -1 B73 vntuma pravided a1 6" depih a 376 cu. fk.
50 3DDD a.sa 034 1045 30DO -9955 aKJ
ss 33DO 064 032 1079 3300 -xzzi
60 3600 061 0 30 't 9 s 3600 -2481
65 35M 060 0.30 1190 3900 -2710
aa 4200 058 0-29 1236 4200 -2954
75 4500 066 018 1277 4500 -3223 sroRnn sroRaaE vaLLME
80 4800 0 53 0 26 1287 4800 -3513
$5 5104 0.52 026 1340 510D -3760 iNax9mum sinra9e re4u3red n 333 cu ft.
90 54041 0.50 0.25 1363 64DO -4037 +rolume pravlded at 9" dWh = 522 cu ft
95 57045 4 49 4 24 9400 57IH1 4292 GKP
1[XI BM Q 4B 0.24 1451 BOOa -45+19
Sfmpson Ertglneersy !nc. 909 Narth Arganne Road, 5pahene, WA 98212 {,09) 92&1322
sa714"- ew,A
fT. STORMWA`T'ER UIZA.CNAGE CALCULATiQNS: (continueci)
Basin A-2
+Curb Onenina at Low Point. Sta. 9+46, left, Z 1 at Cvurt
h=$ in. = 467 ft. Total height vftipening
H= 0 156 ft. Depth of water at entrance
Q _0.98 cfs Tatal peak rrate of flvw
Q= 3.087(L)~312 £or Nlh c 1, a. 156I4.67 =[1.23 c]
T., - Q - (3.087)(H)32 = 0.98 = (3.087)(0.1s6)3~ - s 15 ft
Construct Curb Upening; 6 ft. vAde, 8 in. deep
ii kSr
Gurb {]neninR on Cantinuaus Grade, Sta-17-+-4a0ta 17+-1°8, left, Pioneer St
i
a = 2 in. = 0. 17 ft. Flowlirte depressian at operung
y= 0.079 ft Depth of flow in normal gutter
Q =0 27 cfs I)esign disch3rge
Qa[La =0.054 From Fig 16(a), Page 6-39 "Spakane Count}+ Guidelines for
StorTnwater Nlanagement"
L - Q1(Qa1La) = 0.27I0.054 = 5
Cvnstruct Gurb f3pening; 8 ft. wide, 8 ira. dcep
[7se 2 Spakane County Tyype-2 Curb rnlets; 2@ 4, = 8>
RAT1ONAL Ft7RINLEIA HYDRC7LCTGY
dRAiIdAGE BA51N ANALYSIS far 10 YEAR STQRiN EVENY
Elate- s13= Praject Name. Rtdgemarrt Estates h1v 47th add.
Oesign• kwm F'rcject Numker: 43714
Q3sk File P Ipmlecs113714113714a1 xEs 5ite tacation: hfW 114, S. 25, T. 25 N., R. 44 E.1N M.
Basin lVeme' 14A2 (ourlf}° Basln Descripfion. North side of 21st Caurt
Point af Concenteafiolt' Low Pt ,'9+45 7, l,ft
5UBAREAS' Mnsiiy-[3uraiion for I 0year 5tarm Event
Descrlptlan Acres C A'G
7ime Time Inters3ty
Incrmnt Incrmnt
AsphaR Pavement 0095 090 0085 (m[n J (sec ) (in,lhr)
Driveavays 0496 090 0.041 Wi`W]
Q3rass Lawn 0536 0.15 0.080 6.17 37022 298
Raofs 0.138 0.90 0124 5 300 318
10 6w 2.24
15 goo 4.77
2D 12A(] 145
2'~a 1 5M 1 21
30 1800 1.04
Tatal Basln ArQa, acres ~ 0.814 35 2100 91
Composfte Rr,moff CoefficienE = 0407 40 2400 0.82
combined (Area •Ru►kon coeffirient) = 0331 45 2700 0.74
so 3000 068
55 3300 0.64
60 3600 061
TfME OF CDNCENTRATIaN (minutes): 65 3900 0.60
70 4200 0.58
Tc {ovartand Rv►v) Tc {gutter flaw) 75 4500 0.56
80 4BM O.53
C# = 0.15 iL2 - 104 85 51 DI) 0.52
T1 = 0.172 90 5408 0.50
L1 [A] = 241 Z2 = 36 95 5700 0.49
N(A) = 04 B= U 100 BOdd 0.48
5(A) = 0062 n e 0 018
s = 0.at$
'Fa {A} = 540 d = 0.156
L9 (B) = Q Tc {gu! ~ 077
fd{8} = p Tr.,(A+B) • 540
S(B) = a Tc ttrtaf 617
Irrtensify = 296 REAl4 Df3CHAFtGE, 10 YEAF2 STORM;
Tc (13] - 00 Ftolding 171
Qm C" I" A a 0.88 C.F.S.
Q(estimatel @ d) ~ 098 C I S
Time of C6ncenWlvn = 617 minutes
Nate. The ofher 0 3947 xcres are filovving averfarni str74ht €rto the pond arrd into curb inlet on Pioneer St.
{0 3005 acres are flowing overland and 00942 acre.s cm Pioneer St ]
+~we]
~
RATIONAL FORMULA HYDROLOGY
DRAINAGE BASIN ANALYSIS for 10 YEAR STORM EVENT
Qate: 5/3/00 Project Name: RidgemoM Estates No. 4 7th edd.
Uesign: kwm ProJect Number. 13714
Dbk Fil9 P1proJeU5113714113714a1 )ds Site Locetion: NW 1/4, S. 25, T. 25 N., R. 44 E. W M.
Basin Neme. °A2 (curb)° Basin Qescription: West side oi Pioneer St.
Point of Concentration. Curb Opening, 17+18.6, Lft , Pioneer Rd.
SUBAREAS: IntensHy-DuraUon for 10-vear Storm Event
Description Acres C A'C
Time Time Intensity
Incrmnt. Incrmnt.
Asphaft Pavement 0.094 0 90 0.085 (min.) (sec.) (in./ho
Driveways 0.000 0.90 0.000 (oi'fio)
Grass Lawn 0.000 0.15 0.000 5.00 300.00 3.18
Roois 0.000 0.90 0.000 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, ecres = 0.094 35 2100 0 91
Composite Runofl Coetfider►t = 0.900 40 2400 0•82
Combined (Area' Runoff CoefflcieM) = 0.085 45 2700 0 74
50 3000 0.88
55 3300 0.64
60 3600 0.61
TIME OF CONCENTRATION (minutes): 65 3900 0.60
70 4200 0 58
Tc (overlartd ilow) Tc (gutter Row) 75 45U0 0.56
80 4800 0.53
Ct ~ 015 L2 n 225 65 5100 0.52
Zl = 0.172 90 5400 0.50
L1(A) = 0 Z2 ~ 38 85 5700 0.49
N(A) = 0.4 8= 0 100 6000 0 48
S(A) = 0.054 n = 0.016
s = 0.05
Tc (A) = 0.00 d = 0.079
L1(B) = 0 Tc (gut.) 1.58
N(B) = 0 Tc(A+8) = 0.00
S(B) a 0 Tc total 5.00
Intensity 3.18 PEAK DISCHARaE, 10 YEAR STORM:
Te (8) ~ 0.0 Holding 8.02
Q=C'I•A= 0.27 C.F.S.
Q(es6mated (E.,D d) = 0.27 c f.s.
Time of CortceMration = 5 00 minutes
Note: The other 1.1145 acres are flowing overlarsd into pond or flowing into curb inlet on 21st CouR .
(0.3005 aeres are flowing overland and 0.814 acres are flowing on 21 st Court)
nt(a.c)
v D,C7q `
13EPTH OF (L-OW - Y - FEET
pl ❑2 .d3 Oa ,05 QS 9 .!U 2 .3 a .5 6 7 .8 9 10
- la
~
~ - ~ 7e ~ .s
E
tT ~ I`t
i ~
I~ I I I I
~ ~ T~i l I 1~ I T~ ~ 0 I_ I . a
.x
d Ly~ Q
~
C.
a
V
I '
08
, ~ ~ , , • ~ v ~~-~--~--r-
9
. 0 o , v 5 ~r
n<
.03
f l ! II 1 ~ I I ~ 1 ~ I ~ 0 I
~ .92
~
10
I ~
I o I ~ I
( c~ ] d1SCHARGE PER F9OT (3F ~ i 4/]~, t y 6
LENGTH OF CLlRB OPENIyG ~-----t---~---~a ,
fNLE75 WHEN INTERCEPTING
100 % 4F GUTTER FLQw
, .a
- - - - ~ J4I Q
(b) PA~Fd~'IAL iNTERCEPTtat~ ~'~a
RAT10 FOR 1NLETS !DF
LENGTN LE55 THAN La
_.L._+ -7,
~ ~ •.so
mS .06 .08 tp .2 .3 .4 .S .S B 1.0
~ a 5 1 Y1 ~ ' ~G- L/La
CAPACITY aF CURB OPENING [NLETS
dN Ct7N71Nu{7US GRADE
6-39 FIGURE 16
Ii S7'ORMWATER DRAINAGE CALCLTLATIONS: (continued)
Basin B
Total Area
Tatal = 32,624 sq. ft. N0 7489 acre
Pavement = 20'h Avenue. & Pioneer Rd = 10,972 sq. ft. - 0 2519 acre
I]r'rueways = 5 driueways at 1,000 sq. ft Ihouse 5,404 sq. ft. - 0.1148 acre
Rvofs = 0 roofs at 2,000 sq. ft Ihvuse = D sq ft.
Tmperviaus ~ 10,972 sq. ft. + 5,000 sg. ft. +0 sq ft= 15,972 sq. ft. 0.3667 acre
Grass Lawns = 32,624 sq ft. - 15,972 sq, ft _1f,G52 sq. ft. - 0 3823 acre
Sforaee Required:
a} "208" Storage Required =(10,972 sq. R. )(1I2"=12 in. per ft.) = 457 cu. ft.
b} Bawstring = 429 cu ft. + 1 Single Barrel Drywell, ^Cype A(0.3 cfs out)
Total Staraere Provided:
Fond, 6°° aeepj (15)(52)(0.5°)+ (7)(8)(05')+ (13.73 ft 2 )(0 5')
(52+15+s2+g+7+12 57')(0 375 ft.) = 480 cu ft. > 457
Pond, 8y° deep-, (x 5)(s2)(0,sa~)+(7)(8)(o 67°)+(1373 ft.2){0.67')
(52+15+52+8+7+12 ST )(0.67 ft a) = 667 cu ft> 424
52' r~ s>
nD
15y LJ
JLy r 2.00 ft. _
s. 1.5 ft. .i
3:1 G" _0.5 ft 8" _0.67 ft. 3:1
, (1/2)(1.5°)(0.5°) = 0.375 sq,ft. (Yf2)(2.aa°)C0.67y) = 0.67 sa. ft.
I]E"TEMTiON &AS[H [3E51CaN: RATIONAL F4RMULA HYf]ROLOGY & BOWSTRIT[G METHC3p
DRAINAGE BASIPN ANALYSIS far 10 YF-AR STfIRM EVENT
paYe 5f31oo Pfaject Narre: Ridpmnrd Estafes #d - 71h Rddif Eon
Jo6 No 13714 Project Locatian' 21s1 Court and Pinneer
presiQrwr J Young Drelnage ftsin Name Basln B+ Runvft frarn Rfdgemorit Fstates Rlo.44;th Addltlnn
[Ask qir PPra]ects dramcafc13714 IIrainwge Basin aeseriptiOn Drzsite
Filename 13774B x[s "20$" PDnding Area Nsme: I.W.
For fdidgemorit Fsiates Ponding Area Lwaation. 207h R+renue
Pafnt uf Concentration. Sta.i 4+08, nght
gUgMEAS TI{1~ OF CONCEPVTRR7IQN (1'a), mmutes
pescripfion ,p,cres C q'C Overland Flow Ghannel Flow
fnweralqi8 WS°Ariaes S ►►mr L2 ° 356
Wspha[t Pavement 4 252 090 0227 Ct a 0.15 Z1 = 0172
privavuaya 0115 QM 4103 L1(A) a B Z2 = 36
C3rsss Lawn 0382 0.15 0057 N(A) A 04 I8 = Q
Rwds 6ow E1.90 0000 S(A) = 0.01 n~ 0016
Fc (A) g 000 s n 0 415
Ofher Ams- d= 0176
L1(E3) ° 0 Tc (ch } 268
N[B] ° 0 Tc(p+B) 0 00
S(B) A d Tc totai 500
Tc (6) a 0.0 Intansriy = 318
Total 8asin Area, acrw = 0 749
Composite Fdunoif CoeffioEent ~ 6 52
Camislrtel (Area ' Runnft Coefficienf) = 0 387 0 (ashmetsd @ d) = 1 23 a i.s.
Ffine of ConeenhglErnt a 500 minutea
"208' L?FZfUNAGE PARAMETERS
Impervinvs "2U8" Area a 14,972 sq R PEAfC WlSCHARC3E. 10 YfAR S70RM
'208" Val¢me Prwfdad = 480 cu. ti. a! fi" depth
Storm Sloeage Pravided = 687 Ctl. fC. ffi 8" depfh Q=C' I' A a 1.23 C.F.S.
B❑WS71R5N0 Cd4LCULATtONS
#1 #2 #3 94 05 #g Sl N!lMBER and TYPE of flRYWELLS PROROSEQ
fi[me Time In3ensity 4 dev V in V 6ut Stnmp
fnermrst. Irecrmnt. 1 $Engfe-Baerel (5po[ccane Caurity Type A]
(min.) {in.lhd (cfs) [cu. ft ] ft ) (cv. R ) 0 Eaaubla-Barre! (&pnksne Guunty TYpe
tria'w 4L'C'XaL Iodr `1o7f (A546)
5 1DO soo.bO 318 1.23 ass 90.66 405 vutnow Providea 0.3 0 r.g
5 300 3,18 1.23 456 90 405
90 600 2 24 087 Bo 1&1 429
15 90U 1.77 0 69 687 270 417
20 120U 1.45 055 731 360 371
25 1500 1.21 047 751 450 301 '20S` TFtEATAdEhiT VQLUME
34 1ow 1.04 6.40 7W 540 226
35 2900 091 035 7't8 630 746 Requlred G P1L pondirig volurne:
40 2400 0.82 032 795 724 75 Impervioas "208" Area x 1Z m 457 cu fl
+15 2700 074 029 803 810 -7 volume provided pt S" deglh = 46O eu ft.
50 3000 0.88 4 28 817 gm -83 OKI
55 3300 0.84 4 25 843 9w -147
69 3600 061 024 875 1080 -245
65 3900 0.S0 0.23 930 1170 -290
76 4200 058 022 967 1260 -293
75 4560 Q.56 0.22 998 1350 •352 STORM STQRAGE VOLUME
80 48M 0.53 0.21 1006 1440 -434
$5 5100 052 0.20 3048 1530 -182 AAaxlmum storage required = 429 cu R
90 5400 0 50 0.19 1066 1620' -554 vo3ume pravtded at 8" depth g 667 cu. ii.
95 5700 049 019 1101 1710 449 OKI
100 6M 046 019 9135 k&W -W
5lmpsvn Frrgfneerg, fr►c. 909 Na17h Argonne Road, 3pakane, WA 99812 (SM) 928-9323
,aaumum - eua e
TI. STORMWATEER DRAINA .~`iE GAL.CLTLATIC)NS (continued)
Basen B (continued)
Cur6 Ovening at X..ow Point, Sta 14+08, right, 20`h Avenue
h= 8 in. - 0.67 ft. Total height af opening
H= 4 176 ft. Depth of water at entrance
Q~ 1 23 cfs Tatal geak rate of flaw
Q = 3 087(L)(H)32 for HIh < 1, 0. 176l0 67 = fJ Zfi < 1
L = Q = (3.087)(EW'2 = 1.23 - (3.08 7)(o.176)3'' = 5.40 ft
ConstruGt Gurb Opening; 8 ft. wide, 8 in. deep
Use 2 Sgokane County "I`ype-2 Curb Inlets; 2 @ 4'
11. STORMWATER DRAINAGE CALCiJT,ATI()NS: (eantinued)
Basin C
Area
Total _ 10,059 sq. ft. - 0.231 acre
Pavement = Pivneer St. = Sta. 15+27 tv 13+30 7,444 sq. ft. - 0. 171 acre Dw 0 +*Le ~ l~ ~
~o~ • r ~ i U C14*1- kJ
I]riueways = d driveways at 1,000 sq, ft.lhause = 0 sq. ft. - 0.000 acre
Impervious = 0 + 7,444 sq ft- 0 171 acre
Grass Lawns = 10,459 sq. ft. - 7,444 aq. ft. = 2,615 sq. ft- 4.060 acre
Storaize Reauired,
a) "208" Storage Required =(7,444 sq. ft. )(1 f2" ~--12 in. per ft.) = 310 cu ft.
b} Barzvstring = l 18 cu. ft. +I Single Barrei Drywell, Tyge A(U.3 cfs vut)
'Fatal Storage Provided'
Pand, 6°° deep; (9)(60)(0 5') + (9+60+9+60)(0.375 ft.2) = 322 cu. ft. ] 3 10
PL)ndp g" deet}i (9)160l(0.67') + (9+60+9+60)(0.67 LL 2) = 454 4.u. iL. > 118
60'
97 9?
C7U'
2.00 ft. ~
~
1.5 ft. „
~
,
3:1 6"=05 ft 8°°=0.62ft. /3:1
(1r2)(1 5')(v.s') = 0.375 sq ft. (1/2)(2-00')(0.67') = 0.67 sq ft
DE7E'A!'TION aPwIH DESICiN FiATIONAf. FC]RIvIULA HYDROLQI`iY $ BC7WSTRINC3 NiE'TIiC1D
- DRAINAGE @ASIIV AhlALYSIS for 10 YEAR STQRNF EVENT
Ctate 6r3m Project Name. Ridgemont Estatas #4 - 7!h Addif inn
,ob P!a • 13714 RraJedLocaUnn: 21st Cuurt end Pioneer
Desigw 3 raurg [katnag$ Basin Narne: 6saln C
Disk LAr P Prolects drsirscalc.d3I14 Clreirrage Basin Descriptlan Dnsite
Filenam 13714G & ' c418" PQnding Area Name I.C.
For RrdgemenY Estates Fosding Arae Locaf ion: East 81de af Pianeer
Poirsf of GnnsentrelVon Sta 15+65, RC.
SUBAREA5 TIMr: QF GONCENTRATION (Ta), minutes
Descnption Aeras +C A'G C3vsrland F[ow Chenrtai Fdov
ftgaoois W8"Areas. 4gMtA, L2 ~ 372
Aspha$ Paverr;ent 0.171 090 0.154 Ct a U.15 Zi ~ 6 472
Drrveways 0 000 090 6000 Lt{R} = 10 Z2 ~ 38
Grsss Lawn 0060 015 4 4D9 N(A) ° O.4 0
$(A) - 0.01 n ~ 6016
ptlw,q, To (A)= 137 s~ 0.445
d ~ 016G
s^e~rrie►+t B:
L9{B} = U 7c (ch.) 2 30
A1(B) = 0 Tc(A+B) ° 137
8(9) a 0 Te trafal 5DO
To (B) = 00 InYensaEy = 3.18
Tg1a9 Basin Puaa, acres ~ m.231
Camposite Rurroff Coeflicfent a 0.71
Gom6ired (Araa' R¢nog Coetiicierst) Q 0.163 Q{estimeted @d} ~ 0.52 o fs.
Time aF Conoerrtration 2 5.00 minules
"708" BRAINAGE F'P+Ft►1METERS
trrlpemous "208" RfBa a 7,449 sq. ft. PEAIC t]i3CHARf3E, 10 YEFIR $7DRiH
'2fi8" Valume PrrnirlBtl m 322 cti. ft. e! G" dsptA
5torm Storage PravWel = 454 ca. ft. ai 8' degfh fi s G' I' A a 0.62 C,F.S.
BDW5TR[Ni3 CALCL[LATIdNS
#1 #2 #3 #4 #5 A8 #7 ML1AiIBER artd TYPE af DFtYiNELLS PRDPOSEO
T1me Tima Inlsnsily Q dev 1! in V ou! Slorage
Irrcrmm frtcrmnt 1 Singls-Berrel (5pDkene Couniry TYPB A)
(min) fnmr} {cfe) Lcu ft) fl) (ou 11) a oo„ble-eerrel 4s~okarts coumy Type $y
{ai*fia] {p,'(-V3) IautfW 05-M
5.00 3DO.00 318 o.52 208 90.00 118 Ortllow Rrovidod: 0,3 c.f.s.
5 3D0 3.18 052 208 so 118
iu 600 2.24 0,36 256 ieo as
15 sm 177 029 289 270 19
20 1200 1,45 014 308 360 'S2
25 15M 1 21 020 316 45D -134 -209" TRER7M£NT VaLUME ,
30 18W 4,44 017 322 54U -218
35 2100 0.99 0 75 326 630 -304 Requlred G P.A ponding volume,
40 2440 0.82 013 334 720 -386 EmpaNSous'808' Rrea x 1R' = 314 cu fE
45 27IXS O.74 012 w 810 472 aalums prnvided at Odaplh c 322 cu R
50 30DD 068 0 7 7 344 $IM! 45% 01(1
55 3300 0A4 010 355 so -M
60 36M 061 0.10 388 9980 -712
65 2m 060 0.10 331 1170 -779
70 4200 0.58 0.09 408 1264 -854
75 4500 0.56 0 09 420 1354 -930 STt]RM 57C]RRGE VOLLlNpE
8U 4800 0.53 608 423 1440 •1017
85 5106 8 52 4108 441 1530 -70$9 Nlwdmum starage raquirsd a 118 au fl
go 5400 050 0.08 498 1830 -1172 volume pravlded a! depth n 454 au. R.
95 5700 0 49 008 483 1710 -1247 OK!
1OG 6tlfl0 4.d8 4[i8 477 180fl -4323
SimPsQn Ertgfneers, Gtr. 90 Narih Arganne Road, SpoR+anm, 4YA 99312 (&)9] 826-1322
13714c ae- em~s~ •
II. STORMWATER DRAINAGE CALCULATIONS: (continued)
Basin C
Curb Onening at Low Point, Sta. 15+66, 18' right, Pioneer St.
h= S in. = 0.67 ft. Total height of opening
H= 0.104 ft. Deptb of water at entrance
Q= 0.52 cfs Total peak rate of flow
Q= 3.087(L)(H)312 for H/h < 1, 0.104/0.67 = 0.16 < 1
L= Q~(3.087)(H)32 = 0.52 =(3 087)(0.104)312 = 5.02 ft.
Construct Curb Opening; 6 ft. wide, 8 in. deep
Li STORMWATER T]R.AINAGE GALCULATIONS • (cQntinued)
Basin Il
Area
'I"ata1= 91,064 sq ft. - 2.095 acre
Favement = 21st Court = Sta. 5+05 ta 9+82 = 10,352 5sq ft
Pi~neer St = Sta. 15+27 tv 16+78 = 1718 so. ft.
13,070 5 sq ft. - 0.3001 acre
T3riVeways = 6.5 driveways at 1,000 sq. ft.fhouse = 6,500 sq. ft. - 4. 1492 acre
Roofs =6.5 roafs at 2,000 sq. ft.lhouse = 13,000 sq. ft. - 0.2984 acre
Tmpervious = 13,070.5 sq. ft +6,S0D sq. ft. +13,Q0fl sq. ft. = 32,570 5 sq. ft. - 4,7477 acre
Grass Lawwns = 91,064 sq ft. - 32,570.5 sq. ft. = 58,493.5 sq. ft. - 1.3428 acre
Staraue FZeauared_
a) "208" Storage Required _(13,070.5 sq. ft. )(1!2" =12 in. per ft. ) = 545 cu. ft
b) Bowstnng ~ 742 cu. ft. + 1 Double Barrel Drywell, Type S
+ l Single Barrel Drywell, Type A(1.3 cfs out)
Storaee Reauired
Pand, 6" deep, (12)(91)(0.5') +(12+91+a2+9~)(0.375 ft.2) = 623 cu ft. a 545
PQnd, sp° deep, (12}(s1)(o.67a) + (12+91+12+91)(0.67 ft.) = 869 cu. ft. > 742
91'
12' Pvnd 12'
31'
2.00 ft.
~V 1 5 ft. .i
:i
3:1 6"-0 Sft 81,1=0.67ft /3*1
(1/2)(1 5')(0.5°) _ 0 375 sq.ft. (1/2)(2 00')(0 67°) _ 0.67 sq. ft.
pETEhXTION BPSIH QESIGM RATI[]hIAL Ff7RMULR HYDROLOGY 8 8O111fSTRIIdG METHC30
QRWPVAGE BASIfd ANALYSfS fior 10 YFAR 9TORAA EVENT
Dana. 5m Pro3ed hfame Rsdgertmnt EsWes 44 - 7€fi Addilurn
Jab Na 43714 Project tucetiran. 2'1st Court and Fioneer
Desigrter J Yourrg Drainage Bas(n nlame. @asin U
❑isk dir R-Prcyects dramcalc13714 Dminage Sas3rv DesCripliqn Onsiie
FiRemme 13754Dsds '26B' Pondirtg Ares Nam8: "D"
For RidgsmcrR E~as Pondiflg Rrea Locatrori West &ide of Pianee[
Pnsrel of Cancerttratinn Sfa.15+56. LR.
SUBAREAS SiME OF GdNCENTR4Ti 1C3N (fc), minutes
Descriplion Acres C A'C Overlsnd Flovv Gfanret Flow
L--Vi-S '08`Alreas• _Sftrnert A. L2 = 575
pisplaft psvemW 0.300 0 9D 0170 oi = 0.15 Z7 = 0 172
pdvewgp 0.149 0 8D 0134 t1tA) n 100 Z2_ 35
-U...,......s.,..d i o.,.~ r w sS 1.343 015 17.241 N(A) = 0,3 8= 0
RCvTs U.M 090 4.259 S(A) ° 00054 nm bm6
Tc (A) ~ 553 s = 00242
❑dwAreas. d a 019.9
. srrr s•
Ly(a) g o gC (c►s.) 314
N(13) Q 0 rc(,a+s) 553
5{B} c 0 Tc toiaB 867
Tc ~ 00 Ir~ensity a.as
Tctfaf Sawn Fueg. acre.s = 2,491
Campbsiie ftunofi Cnaffiamnt ~ 042
Camhined (Am' Rurwff Coeftient) ° 0.874 GI (estirrtated 0 d) ° 218 c.f.s
;ime of CancenlrebsQn = 8 67 minules
"'2W pRAINAGE PARFhlETERS
fmpervlous '20$" Area = 13,a76 sq. ft. PEAi[ DESCHARGE, 40 YEJ4R STORNI
-208' Vntume Provided e 623 Cu. R ai 6" dgpth
5tcsnn Starage Prwfded = 8f9 cu, t1 at 8" depfh Q= C' I' A a 2.18 C.F.S.
BovusTR€Nc3 caLcuiaTIOas
#1 #2 #3 04 #5 #6 07 NfllMBER and i'YRE of QRYINELLS PRQPC]SED
Tim$ Time lydensaly Q clev V ip V aA Stnrage
IrcrmnL fncsmnt. 1 Slngle-8arra! (SpoI- Caunty TyPe A)
(min ) {fiec } (nJhr) (ds) (cu {E.) {cu fl ) (cu ft) 7 Dnu6te-8arrel (Spokarte C.ounty Tyrpe B)
[1""%) G4'GW7 [outtV21 t~.`sw
9 67 52033 2.49 218 1518 67643 841 [3utftvw Provided 1.3 c f.s.
6 3m 3.18 2.78 illa 390 ras
10 50tf 2.24 196 1522 784 742
15 9DO 1.77 1.55 1657 1170 497
20 7200 7 45 4.27 1746 156(f 196
25 150 1 27 406 9774 SM -178 "2U8°7FlEATMEhFT VOLUfV[E ,
30 98M 104 0.91 1788 2340 -542
35 2100 Q.91 0.80 1892 2730 -918 ReqLired Cy.PA pondirig +sdume-
da 2400 0.81 0.72 1848 3124 -1272 [mperviaus "2Fb8" Ptma x 1f2= 545 au. R.
45 2700 4.74 0.65 5881 3510 -1549 volurrte prtFVided s! 8" depih = 623 cu R.
S4 3000 0.68 0.59 4889 396 -2011 OiS!
65 33~ 064 0.56 1W 429D -2344
60 359O 0 84 0.53 2094 45B0 •2fi6S
65 39DIJ 6.60 052 2139 5070 -2931
70 4200 0.58 0,51 2220 5456 -3340
75 45M 056 099 22M 5850 -3560 5TC7RM 57QRAGE Vt7LLAKIE
80 +18M 053 4.45 23DG 6240 -3934
85 5400 052 0.45 2339 6630 4234 Maudmum stnrage requlred = 742 vu R
Bp 5400 4.50 044 2438 7020 -4582 solurrse provtded at 8" depth = 8&9 r,u fl,
95 5700 0.49 0 43 2518 7470 -4892 014
100 am 0.48 fl 42 2552 78tl0 -5208
Slmpson fr+gfnsers, fnc. 9091YarMftanna Road, Spokarr$, WA 93212 (w) a26-1322
iarawam- o-~- o
TI. ST{3KMWATER DRAI.NACrE CALCULATTf3N5: (cantinued)
Basin D
Curb Onenina at Iow Faint, Sta. 15+66, 18' left, Pioneer St
h= S in. = 0.67 ft. Tatal height af opetung
H= 0.199 ft. Uepth of water at entrance
Q=2.18 cfs Total peak rate of flow
Q - 3.0$7(L)(H)"2 far H/h < i, a 199/0.67 = o 30 < i
L = Q - (3.087)(H)"2 _ 2 18 = (3.087)(4.199)312 - 6.35 ft
Cvnstauct Curb Opetung; 7ft. wide, 8 in. deep
IZ. RC}ADWAY SiJRFA+CINU I]ESIGN:
The Spcakane +County Altexnative PaVement I?esign (TnCerim) for Lacal Access Pavement SCructures wa5 used for
design of the roadway surfacing.
Fr4m the table, Local Access Pavement Strtitctures, the fvllowing infvrmafiion is needed to deterrxtine fihe required
surfacing depths.
1} The type of street rnust be Iocal access.
2} Soil type (as classified by the United Svil Classifcatron System)
3) The average daily traffic, ADT
Street TvDe: Pioneer Street, ana 21st Court are designated as local access (residential).
5oi1 Tvpe:
Tn accordance with "Svil Survey, 5pvkane Cvunty, Washington" by United States Departmenfi of Agrieulture,
Soil Canservation Service, 1968, Che soil found at the site is categorized as:
GmB, Garrisan very gravelly loam, similar to Garris4n grauelly lflam, except that the
surface layer is very gravelly.
Test holes were dug by Simpson Engineers, Inc. at the centerline intersectian of 1'ioneer and 215` Court at the
Sta¢ion 15+78 for Pianeer Rcaad. Anather test hole was dug at tne center of the cul-de-sac of 21" Court at the
SFatican S+SQ. The test holes were dug to a depth of approximately 12 inches be1ow subgrade. 7'he soil sarnples
were tested by 5trata Geatechraical Engineering. A sieve analysis was performed by Strata an soil samples #1,
and #2. Fram the testing, the sakl type was faund to be aBrown SiIty Gravel, GM per LJnified Soil ClassifiCation
System. {See sieve analysis resukts included.}
AVerage Dailv Traffic, ADT:
Pianeer Raad wi.l.l have aVerage daaiy traffic counts of less than 200. 21' Caurt will be cul-de-sac with an
average daily traffic count of Iess than 200.
DesiL-n:
Fram the tabTe, 2 inches of asphalt cancrete paVerr►ent mver 6 irsches of crushed surfacing
is reguired for pioneer Road.
From the tahle, 2 inches of asphalt concre[e paveanent over 6 inches of crushed surfacing
is planned for Zl' Court.
( (
~
s T R a T a
~ GEOTECHNICAL ENGINEERING 8 AIATEpIALS TESTING
1620 N Mamer Rd . Budding C. Sune 100, Spdcane, WA 99216
509 891-1904 / Fax 50989i•2012 / e-rnail stratspkCrea com
May 24, 1999
Client No. SIMENG
Project No. S990026-1
Reference No.: SL05201
Mr. Kevin McMuIlcin
Simpson Engineers, Inc.
N. 909 Argonne Road
Spokane, WA 99212
Project: Ridgemont Estates No. 4 7`b Addition
Date Received: May 12, 1999
Date Tested: May 13, 1999
_ Description: Brown Silty GRA.VEL
Location: 21' Court Cul-De-Sac, Sample #1
SIEVE SIZE ~ % PASSING ~ SPECS
3.0" ~ 100 ~
1 '/z" ~ 59 ~
1.0" ( 49 ~
a/„ ~ 46 ~
~iz°° I 38
i
3/8" ~ 35 ~
No.4 ~ 27 ~
No.8 ~ 20 ~
No. 16 ~ 14 ~
No.30 J 12 ~
No.50 J 11 ~
No.100 ~ 10 ~
No.200 ' 8.3 ~
Sincerely,
STRATA, INC.
Rick Woodworth
Testing Services Manager
RJw:c„
IDAHO • WASHIr:uTON • OREGON • lYYQ1A1NG • A40NTANA • UTAH • VE4d0A
r~
~
s T R a T a
GEOTECHNICAL ENGINEERING 8 MATERIALS TESTING
~
1 620 N Mamer Rd.. Budding C Swte 100. Spoktine. wA 99216
509891•1904 / Fax509891•2012 / e-madstratspk@iea.com
May 24, 1999
Client No. SIMENG
Project No. 5990026-1
Reference No.: SL05201
Mr. Kevin McMulkin
Simpson Engineers, Inc.
N. 909 Argonne Road
Spokane, WA 99212
Project: Ridgemont Estates No. 4 7"Addition
Date Received: May 12, 1999
Date Tested: May 13, 1999
Description: Brown Silty GRAVEL with Cobbles
Location: Intersection ofPioneer Road and 2 1 " Court, Sample #2
SIEVE SIZE ~ % PASSING ~ SPECS
5.0" ~ 100 I
4.0" ~ 86 ~
3.0" ~ 86 ~
1 %z" ~ 76 ~
1.0" ~ 62 ~
3/4" ~ 54 ~
1 /2" ~ 44 ~
3/8" ~ 39 ~
No.4 ~ 29 ~
No.8 ~ 23 ~
No.16 ~ 20 ~
No.30 ~ 19 ~
No. 50 I 18 I
No.100 ~ 17 ~
No.200 ~ 14.9 ~
Sincerely,
STRATA, INC.
R.ick Woodworth
Testing Services Manager
ww:cm
IDAHO WASHINGTON • OFEGON • 6VYliMfNG k10NTANA • UTAH • NEVAOA
LC3CAL ACCESS RAVEMENT STRUG TURES
AVERAGE DA[LY TRAFFIC
SOIL TllPE ~ CO-_ZODq 200-600 600+
Gv v ~p~ `Il/r.a y~1l . ~']1lr+6~1 2[11611
~ G P 211/611 277rr 211/7"
GM (2"1/6~~) 2FI~ji1 211I+QR11
~
G C 2i77n 2n18ie qe~fGu
!
nr~ .7se~rr
S V V +'f1erfG~~ei 2+1►7~
~
SP 261/611 21,/711 211/811
SIYI 291FI nf1 L e7rr!rp01i +~"Fp6rr
SC PaVe[1°IEnt DeSlgn
~
4v6 ~ aL 311/6EI ~]1irfQ❑li 411]611
r ~
' cL Pavement Design
OL 417711 577„ 511~8"
MH Pavement Design
pH i'avement Design
pT Pavement Qesign
1} Soil type is classifed by the Unified Sail Classifcation 5ys#em.
2} Required thickness is given as inches af asphalt cancrete pavement over
inches of cnashed surfacing.
SPOK4NE Cd~NTY ALTERNaTE PAVEMEN1 QESIGN
. ~
(INTERIM)
Z`ry a depth of 1.2' 4-4.1 Dr7welIs -Precasc cflncreta dry-
wells, as shcsan on COunty sCaadard
,486 g2/3 511~ R Area drawings, csay be u,sed to retaia stor=
dra3nage ia svils wieh a var; rapid pe_
a Wetted perzmeter meabilitp. 1ypes A agd B Drywe3ls in
Ctae following soils rnay be designed to
~ 2'x.1. 2'+(2xj.2.x2.2)° 5.28 s.f. imfii trate a rate of flow vf 0.3 ess axza
2 -r2(l. 22+2. 42-) 7.36 f t. 1.0 Cfs r@SpeCT_'i5►e17:
Sang Marb7 e
R - . 717 Bariner Phnebe
Garrison~ 5nriagdale
a~
V-1.486 (.717) 2/3 (.[72) 1/2 ~ 5.61 fps The Tocat oa.s af these saiZ types a.re
•03 shown in the 5oil Canser-,racioa 5ert*ice
Soil Surrey far Spokaae Cov.nr-p. Tfle
Q= VA = 5. b1 fgs x 5.28 sf - 29.6 cfs drainage repart 6halI include a copy aF
. the SCS ~nan w~.th tfse aubdin~.siQa p3otted
= 3C~ css , . ~ ~ I. ~ ` !:hereflA. The Couuty Engineer sha2l re=
qu.ire ttte deve3oper Co prflvide a sieve
SoIve Dc. Try 1.3' analysis and soiI type tesc fram a sails
1aboratary acceptabZe to zi~e Gaunty Ez-
Q g (t~ + c F}c )3 ~3, 3/ 2 gineer if there is a gues cion regardiAg
b + Zy I]c tkte abvve soil tpges.
312 in rural areas, as dezined ia Spokane
~-,/32. Z (212ml. 3)3 g 1.3 - 30.9 ef s Couney L3nad S Candard.s, oDen gravel drp-
{2+2X2_n.3} welZs may be perrnitte+i iA lieu ar t:te
precast coacreta ~3r~e? Is.
30 . 9 cfs - 30 cfs .r. ~ ~..3' ,
D > D ,flaw is supereritica3. P-@cast concrete drywe?ls propased for
c a use in ather sai_s than thase shcwn
~,bc~ve aztd ~3 aper~ gravel dr7we?1s sha,Ll
S~.nce the flaw ~s ~uper~ritical, care be desigae
s~ accordiag ta per~~la=inn
shoesla. be taken Co pra~r~.de a proper de- ~ates d~termined l~y a f~e~.d [~st can-
siga at poiats where har~,24nta~. auc~/or forming ta the Ilaaual. of Septic tank
►rert~.cai al~gnm~ne ~hange. practiee. A Ccauaty inspeczor shall be
gresent du~iag a~Z per~ola~ic~. ~ests. c~
A fxee t5aar~1 of .3(}d $hneal.d ~Se applied pereoIati.na tesC eal.culatian sheet
D - .3❑ ~C 1.2 - I.S~ ~ aigned aad sealeri 'by a registerea. civj.3.
esagineer shaT3 be submtzted. The per-
❑_~.6 ~ ma.~rimum all~awahle. '~oIacion rate sha7.3 be eyua~, to or
greater thaa 72 inches pes hau.r tn be
acceptable for drys~elT canetruc~an.
FroVic~e r~~a r~.p. (P.~fer ~0 5ectioa
,
4• 5. ) 4-4. 2 Sterage Facilities - I}ecent{ Qn
lf ~~es ~ap ~ie used Cr~
s tarage faci
4-4 i]eCentir~nlReeeatiflt~ Systems -The ~egulate flQw rates. Aa csverflav
peak rate af rnn-rsff fram a~r. ~existing ry,pe gtarage system s.eh regu~.ates the
site sha.Il nat be increased due to the rate of outflow shall be used. See
prQposed devel.o}rmeac for a giWea design ~igures 4-3, 4-41 4-5, and 4-6 for
sCQrm. Therefere, a recencionldeten- suggested detaiils. Iaadscaped facil-
tion faciZitp nn-site will be required. ities such as parks, glayfieI.ds, teanis
- cvurts, etc. are recommended for
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5UBaF;EA i= 11.2 ACRES SURAREA 1 F;LJIVQFF CuRwE• rauMBER =71.'
T []TAL iREA = 11.2 hGRES CDMPOS I TE GUn''E 1VUMBER = 71 . 00
BASIN INFUT L7ATF1 • _
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WATERSf~ED SLQF'F = 4 F'ERCE!VT ' .
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I7cSGFi I F'T IC]N = 5TDR1"IWr=jT~R DRM I NAGc
SiJHAREA I 14 ACRES SUBF1REH^ 1 RLs"JOFF CtJEFF T C I ENT = .9
5i..lE+iF:ER 2 =.24 ACRES SLJBARE-fi ?RI.JIVOFF COEFFI C TENT = .15
TOTAL AREA = ,58 ACRCS CaMF'gSI TE RIJIVC]FF CCJEFF iCIENT = . 5e9655172-414
CI'iERLANI] FLOW VALlJES
Ct = .15
L
IV = .4
S - .01
CHANNEL FLaW 'JALUES
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N 0 16
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I3AiE r`20! 72 DESiGNE~'i =K W i'1CMEJLKI N
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~~~CRIF'T I L3N = STOFtiMWATEn I7FiAI NF'sGE
t t Intensi,ty Odev. Vin VoLit Storage
tIr~a.r:. ] (sec. l tin.1hr. i {c.f.s. ) tc►.L. ft. ) (cu. -Ft. )(Cu. +t. )
5.0 100 7.18 1. 09 47.7 347
5.4 ~ -=7 e . 02 1. 05 461 98 3, 63
1 i s,C) 64DU 2.24 .77 545 18O 365
15.0 1~00 1.77 .61 612 270 142
2:.13. s' 1200 1. 4~ . 5i~ 1050 ':,6 0 29C)
25.(D 1.21 i ba 4=0 217
1 100
s 1.04 . yo 680
71a d C) 2100 .?1 1 6 8 671=a
40 , Ca 2400 .92 , ~a 704 720 -10
45. C7 27~~f} .74 711 c `1 -'~9
5 cz„ c~r :000 .68 724 C700 --176
~100 .64 .22 ! t7 99c, 247
60. cys ~6'00 .61 .21 77 ^ 1 ; l ^0 r; x6
b=. 7. 70 cs . 64D .20 816 1 17C) 754
70. t i ~#2()~ ~ .59 . ~''s=r 8~~ T -405
75.0 4ac~) 0 .56 . lfi 2 75 17-50 -475;
~F?i 1i~1 . S1 .~.2 $'~cs i 4 ±t_s --550
135. 5 100 .52 d 18 916 157.0 °612
yi 1. [a 54L~C~ . =C} .17 942 162c) -67~'
95.0 J/ Li0 .49 • 17 774 1710 ""7Z.6
10 is.0 6000 .42 .110 1~=fir ; 1800 --797
TFEE Mo-"yXIMiJM 5?'DRAGFz. Ta 17+54.73"o~~t37~r°1 CLJ. FT.
MThe time ai concentratz on i s 5. 44S4? m1 nutes,
Tre Llndeve1 opeci +1 ow out i s f. s.
i EN `s'EP-$R 57GRM C,=,LC
6ampson Engine¢rs, Inc.
CIVIL ENGINEERS AND LAND SURVEYORS
N. 909 Argonne Road • Spokane, WA 99212
(509) 926-1322 • Fax: 926-1323
TO: (-cir, i..v ~+ran k-S ~I?C) ka,l c- co . ~het rn&-ee`s
J ' v
SUBJECT: 4 - 7 -
DATE: Glr 4-1`'o-L
!^iT I DuC~N F~ l 5 Yl ars,,r TvT 9e- nOuG E ~o~d, I I.nr. a. (
1 ~n e-h r_ i')F_F d fei ~ e; G~dClecl -~a -f N 8
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Signed
EN'f i rtA5-Built5" App,,cant
F~-1423F Kenneth Tupper
-8' Kenneth Tupper
RIDGEMONT EST NCl 4
7TH ADD
as-zs-aa T&RDate
Preltim Review Hruriiig d~7nte
sn_52sa7:
3 26TH, IV 24TH, E 5ULL1VAN, W T[MBERLANE
Lg Lots No i 14 LL]'I'S - 3 66 ACRES {ENGINEFR'S DCPT} - Plat File-
- ~ RIDGEMONT ESTATES NO. 4 7TH ADDITION
STREET PRQFILEa DRAINAGE SYSTEM
AND SANITARY SEWER
INSPECTIDN REPORTS ANII MATERIAL
TESTING REPORTS
JUNE 199 2002 AP1it:L 17, 2002
.
:
• ~ ;
~C~u~~r En~' n~
~
r~Q~OFFl~I~'.'~.1C flOCl1MENT f~''~t+
[,~R1GINAL
~'A~S-BL~lLTS`~
CEI~TI~IE❑ RECOFiD 0~11111NCS ~
~ROJ~~T x
DATE ACCE~TEp:
~jQPI~
~
SIlVPS[3N ENGLNEERS IlVC. UPIRES 71171O3
N. 909 ARGONNE ROAD
SPC7KANE, WASHIlVG'T{7N 992 Y 2
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CLARENCE E. SIMPSON
6& impson P-ngineers, Inc. 1901-1987
RICHARD L. SIMPSON
CIVIL ENGINEERS AND LAND SURVEYORS CHARLES E. SIMPSON
FOUNDED 1946
Licenced in Washington and Idaho
N. 909 Argonne Road Spokane, WA 99212
(509) 926-1322 Fax: 926-1323 '
February 8, 2002
Randy Stronk
Head Inspector
Spokane County Engineers
1026 W. Broadway Avenue
Spokane, WA.
99260-0170
Re: Ridgemont Estates North 4`h 7`h Addition "punch list"
Dear Randy:
On, December 14, 2001 Ken Tupper and I met you on site at Ridgemont Estates North 4ih
7 cn Addition to review the street and drainage construction which has been completed.
From my notes I had the following three items.
1. Along Pioneer from approximate stations 15+45 to 16+30 the sidewalk needs to be
replaced due the substandard thickness on the back edge.
2. The slotted drywell cover along 20th Avenue in Lot l which is now in the sidewalk
needs to be replaced with a solid cover. (This has been done.)
3. In Pioneer 2 4x4 patches were installed after drywells had to be raised since they
were paved over. `fou wanted density test and sealer placed over patches. Strata
stated they can not obtain the density without the Rice number which is unknown. I
recommend that the patches should be sealed when weather permits and then review
the structural integrity of the patches in late summer to see if they are okay or need to
be replaced.
f
Also ponds will need to be fine graded and then seeded this spring.
From my notes these are the items which need to be taken care of to satisfy your punch
list.
Sincerely; '
d
Charles E. Simpson
Civil Engineer '
• : ° , . . • , ' • ~ • ' , ,
. - . ~ ~ imPson En9ineers, Inc. ~ . ~
CIVIL ENGINEERS AND LAND SURVEYORS ~ .
' N. 909 Argonne Road • Spokane, WA 99212 .
(509) 926-1322 • Fax: 926-1323 -
TO: C ku cV, F-~ Er (e, 0-o, o„ ~
. ~
SUBJECT: -R, cLa,r►, ~ C s~'~~"F s N-v;r + 7+h H c, 1-
DATE: 4-14 c-, l
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Signed
irirapsvn Eng~ine, ers, lnc. ~ . ~
;
CIVlL ENGENEERS AND LAND S[JRVEYORS
, . N. 900 Arganne Raad • 5po1[aRer WA 99212 ~ . ~ (509) 926-1322 • Fax: 926-1323
- TO: T-:~(;knj t-i ' S +~O~rx kS Fina tne-e-rs ,
' SUBJECT. F-s~o,+cs Na~-+L 7L'
DAT€: 4- 1[`11C'3`'Z.
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-COMM. 'RNAL- DRTE DEC-94-209' ~ TIME 17:23 P.01
MODE = MEMORY TRANSMISSION START=DEC-04 17:22 END=DEC-04 17:23
F I l.E N0. ° 230
STN N0. COM ABBR N0. STATiQN NRMEiTEL.NO. PFiGES DURATION
001 OK s 4774715 002i002 00:00'42"
-SIMPSON ENGINEERS -
-509 926 1323 509 926 1323-
r-- - . ~
, Fovnded 1448
~ impson E71gineeTS, Inc.
• N 909 Argonne Road
Spokane WA 99212
Phone 926-1322
Fax 926-1323
PCK
Uti.'iTas From: l_k uc_ I r•1_P ~an
Attef.bon: R~ {~a u s cr, Pages: (lncludin; Cova Shecc)
Fax 4-1 -7 4-77 l 5 oaee: 1 7_/ 4- / n I
Rc: ~A Gr%¢.1 ~ Pr7S.Su/v_- tQ.ST R. Oar.Pno-.+ ES la-fQr Ner-Th 4- :-Tun -7-~h
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❑ Urgent 3 For Roviaw O Please Commont ❑ Please Reply ❑ Per Yaur Requcst
• Gammenis:
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. . - _ _
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s R a T a
' GEOTECHNICAL ENGINEERING 8 MATERIALS TESTING
1620 N Mamer Rd, Building C, Swte 100. Spokane. WA 99216
509 891-1904 / Fax 509 891-2012
CONCRETE CYLINDER TEST REPORT
Report to: Mr. Chuck Simpson Report No.. 12225
Simpson Engineers Date: 12/10/01
909 N Argonne Rd Client No.: REMINC
Spokane WA 99212-2789 Project No.. S010030-3
Project: Ridgemont Estates Permit No.:
Address- 20th & Pioneer
Contractor: Bacon Concrete
Placement Location: South side sidewalk on 20th from 100' west to Pioneer
~ MATERIALS AND MIX DATA ~
Reported by- CPM Concrete Supplier CPM
Mix No.. 321130 Method of Mixing:
Sacks/CY- 5.75 Aggregate Source:
Cement: Water Source:
Admixtures: Calcium Chloride 1%
AEA REQUIRED STRENGTH, PSI
SPECIFICATIONS 7 Day.
Slump, inches• 28 Day-
Air Content,
~ FIELD TEST DATA ~
Slump, inches- 4 1/4" (ASTM C-143) Truck No.: 4
Air Content, 65 (ASTM C-231) Ticket No.: 116454
Unit Weight, pcf. (ASTM C-138) Time Batched- 9-08 AM
Conc. Temp. °F. 60 (ASTM C-1064) No. CY represented-
Air Temp, °F. 37 Water Added, gal.:
Concrete Sampled (ASTM C-172), Cylinder Curing (ASTM C-31)
Tested & Cylinders Cast (ASTM C-31) Field Cure Days. 1
Date Cast: 11/30/01 at Temp. Range, °F:
Time: 9:20 AM ' Lab Cured from: 12/112001
By: S Cron Date Received- 12/01/01
~ LABORATORY TEST DATA ~
(ASTM C-39)
Sample No.. 9515
; Cylinder Cylinder X-Sec Total Fracture Date Age Comp.
ID Diameter Area Load Type Tested Tested Strength
(inches) (sq in) (Ibs) (days) (psi)
9515 6.00 28 27 102,000 Shear 12/07/01 7 3610
9515 0.00 0 0
9515 0.00 0 0
Hold
~ cc: Central Pre Mix
,
Reviewed By. ~ ~IDAHO • WASHINGTON • OREGON • WYOMING • MONTANA • UTAH • NEVADA
DA:,.Y aEIsERVATrO~ DLkRy
• J d
s im~'son ~ngjnezr6, I~'I"~a PRO.lEC~' 7ITLE Rl~-t,~,~:.,~T V!6 `74
PFIOJEC'6 ND. I'3 z1 4
Gwr: DATE: a 1 ~ 3 waaK rEUiaD 9 AIra
wEAThEFi~~ 1% TEi.tP. MAX 30- !F: ►a{hl Fc FA.EC7FITAlWN ~
rruM8iER wlrO CLAS.S OF REH50tIlWEL EidPkaYLO: Lli1$LIi10
1 ~e ~►^E ~ Yl
i
1aAJOR E[]uIFMENT ON rHOaECT
- ht~. ~ []ESGRI~TIi]rr Si2E1CAPACLT`f 1 MHS- OPER
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~ Q20TUG3iwICAL EWdINEfiR11VO x en,areRewL& resrinG
' 1620 N Mamer Rd, 9uildmg C, Suda'100, Spokana, WA 9921$
509 899 -19[141 F asc 5[S9 691-20 12
i
- Froject Daily Repvrt
Mr. Chuck Simpsan
Sirnpson Engineers
909 N Argonne Rd
- Spokane WA 9921 ?-2789
Project Name: Ridgemont Estates
13ate: December 1, 2041
C1ient No.: SINNIEENG
Projeet No.: 5010097-1
Daily No.: 12047
Permit No.:
Address ?o`h & Pioneer
Tnspection: Cylinder PJLJ
F'ersannel: Louis Reedy
Narrative: Picked up cylinders east 11130f01 and transported tsa Strata lah for curing and
testing.
5incerely.
sTRArA, IvvC.
Rick Vdoodworth
Testing Servxces Manager
Distrihutron:
- IDAHQ WASHINGTON [3REGON WYOM6IVG N1CDfVTWd4A L1TAH AiEVItE3A
t
i Ft c : a
l 0E0TECHNICAL 8M4k1dE8RIWZV p MATEAIAL$ TK$TIN6
1620 N Mamer Rd, 9uildieig G, Suite 100, Spokane, WA 95216
509 891-19041 Fez 509 591-2072
_ Proj~ct Daily Report
Mr. ehuck Simpsan
Sirrnpson Errgineers
909 N Axganne Rd
Spvkaae WA 99212-2789
Praject Name: Ridgemant Estates
Date: NavernbeT 30, 2001
Client No.: SIMENG
Froject Na.: S010097-1
I)aily No.: 12225
Perrnit N0.:
Address: 20'h & Pianeer
Tnspec#ion: Cancrefie
Personnel; Scott Crvn
Narrative: Observed the placement of 8% cubic yards of cvtacrete located in the
sidewallc on 20'h sfireet south side fram 100' west of Pivneer to Fianeer.
Obtained ane sample of mix #321134. Results of testing as follows: slump 4
'/4", air content 6.5°r'o, ambient temp 37°F, concrete ternp 60°F. Cast one set
of four cylinders.
Sincerely,
STRATA, INC.
Rick Woodworth
7'esting Services Manager
' Distribution:
II7AHD WASHiNGTON OREGON WYOMING M014TAIVA UTAH NEVA[}A
i
~
6& impsan Engineefs, Inc.
J C1ViL ENGIAIEERS AND LANQ SURV'EYORS
~ N. 909 Argonroe Road ■Spvkane, VV"A 99212
~ (509) 926-1322 • Fax: 926-1323
TO: Jol'i!'i PL 3pAea ,e- CoF ~ ~`l c~ d r~ ~ ~ r3
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12007 E Empire Way
SpokanB, WA 99208
Td 5as 477 1e84, Fa, 509 aaa ee9e
InSpeCf'10n rep[)rt
63ate PFOject 1Nealher. Operator seclion number Sec[16n Name:
9011512001 kp 45 M cfear dry ~ chrls I 1 ridgernant est #4, 7th
' Pkanning # i Teuck + Flushing dale, I Presef, ~ Claane& Grade
pe 7423-82 j u-307 ~ a
Town spakane Map #S _ }v'd lgfh 212.2 F7
5treei: e 21st et Map #2; MH 155.51213
5ituaGon: no data Tape 1056 M}i: 158 2i24.3
, ReaSOn {or In9pechon: posl-pave irtspect7vn Dlameter B
, 5ectoon 7ype; waslewa4er , Material: PVC Leng[h:
Profetlion
Grid; 25542 Fale 4423
Remark:
1:475 dist cocfe abservation coun#er photo rate
, 1 5.5127 '
PJ` 650 5T 5tart af survey 000016 0
d
_ 25.70 GE !3eb rrz, rfon WnV nsedecJ--nav!~k 00 Uf:L•(i 3
42 20 T Tee, at 02 o'clpck, diameter4 in 0001,59 fl
4360 T Yee, at 10 o'clnrJc, diameter d in 00 02:25 ❑
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~--~124 30 T 7ee, at 10 o'cPock, diameter 4 in 06-06.05 0 `
198.40 7 Tee, a[ 02 o"c}orJt, dEameter 4 m 00 09;13 @
120040 T ~`Qe, at 10 o'ctacl[, dtameter 4 In ~10.16 06 0
1~ 3 12.20 FFS Finish survey 0011 13 0
OCT-18-2001 11: 47 5094564?15 P.01
i f kana Gountyr, QNastewaferl4lanagerrrenf
12007 E Ernpfre Way
SpokaRe. WA 94205
Te1 5i19 477 19H4. Fax 5ds 477 e9Be
Inspection report
❑eta: I Prajec! Weather. ~ (]peratar. saclian num6er: Sec4ian iVame;
1011512001 f tp 45 claar dry ehvls ~ Z ~ ndgemont ast #4, 7ih
pPla 74~ g82 I ur3n7 ~ Flushinc~ date + Ptese! I Cleanetf' I G~ e.
Town• spakane ~ Map 4 1. iu'd Igth 211.1 FT
Stfeet. e 21st Ct IIAap #2 MH• 156.Zf213
Sifuation , Sireet- light fraffilC 7ape 7056 fVIH. 756.9121.3 ;
_ z
Reasan far InspeGdvn, pnst-pave inspec4lon Diameter: 8
5ection Type wastewater Materiaf F'VC Lengsh• ;
Prptection' '
Gnd: 25542 File 1423 '
Remark•
1:525 dfst code abserrration counter phato rate '
~
0
~
9
.
39.30 i'+E Deiaris, cleanrng neQdec!-•1104v ok LI 130,-93:03 3 i
. 5400 T Tee, at 62 A'elack, d+ameter d fn 00:13:48 0 ,
55 7() T Tee, al 09 o'elade, diameler 4 in 40:1415 6 i`.
~ • ;
S r~
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143.50 T Tee, at 02 o'cfack, diamefer 3 in 00 18;16 ❑
1 ~1Ad SQ 7 Tee, at 09 a"clock, diameter4 4n 0018'57 4 j
,
a
~
cl~2~i i 10 GP evidenr.e of severe hydrautic prablems Oa:13.55 2 6a 0
91 3 ~
I
f
DG7-10-21301 W47 5094564?1.5 ' 99i P. 02
STATEMENT Page• 1
Strata, Inc Statement Date: 10/08/01
8653 West Hackamore Dnve
Boise, m 83709 Salesperson: Spokane
(208) 376-8200
SIMPSON ENGINEERS, INC. Customer No.: SIMENG
909 N ARGONNE COURT
SPOICANE, WA 99212-2789
. 0.00
DATE REFERENCE DESCRIPTION CHARGE CREDIT BALANCE
-/25i01 S010516-IN 1tIDGEMONT ESTATES 863.50 863.50
TOTAL 863.50
CURRENT 30 DAYS 45 DAYS 60 DAYS 90 DAYS BALANCE DUE
863.50 0.00 0.00 0.00 0.00 863.50
- DAtLY OEISEFIaF►TlpN OtARy,
_ 6N Imp:7~~ ~~~~neets,~ ~nc. PALIJEGT XiTLF-
- ~ PROsECr No.
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~ GEOdECHNIGAL ENGINEERING 9 MATERIALS'YE'5TdMG
1620 N Msmer Rd, 8u{ldlrrg C. Sw[a 100. Spukana, WA 99218
549 857-1994 1 Fex 509 891-2012
CC3NGRETE CYLlNpER TEST REPC]RT
Fdeport to Mr Chuck SirrrpsoR Report Na 11106
Simpsan Engineers ❑ate: 09128I01
909 N Argonne Rd Client Na SIMENG
Spvkane WA 99212 2789 Project No 541 Q097-1 .
Praject Ridgemont Estates Permit IVo.
' Address: 2 1 st Aae and Picrneer
_ Caniractor° Bacon Concrete Inc
Placement Location- Curb norkh side
~ MATEFiI►a►LS A1dD MF7C DAT►4 ~
Reported by: Central Pre Mix Goncrete Supplier Central Pre IVlix
[Viiu Na - 321112 Method of Mixirtg:
5ackslCY: Aggregate 5ource'
Cement 5 75 sk Water Source:
Admixtures: MB P,E 90
RE4UIRED STREfVGTH, PSI
SPECIFlCATIC3N5 7 ❑ay
Slump, inches 28 ❑ay 3000
A16 CofItent, °fa
~ FIELD TEST DAT,A ~
S[ump, inche5: 1!4° {ASTM C-143} Truck No: 921
Air Canient, °r'Q. 5.`1 (ASTM G-231) Tickei No 110751
llnit Weight, pcf (ASTM C-138) Time Batched 8'23 ARV6
Conc Temp °F ?Q (ASTM C-1 064) No. +CY represented
Air Semp, °F. 81 Water Added, gal
Concreke 5ampled {ASTM C-1 r 2}, Cyfinder Curirrg (ASTM C-31 )
Tesfed & Cyiinders Cast (ASTM C-3 1) Fieid t;ure CJays:
Dafe Cast 08129101 at Temp Range, OF-
Time• 9 DD AM Lab Cured from
By' C Mc64issen Date Received 08130l01
~ LAgDRATC]RY TEST DATA ~
(ASTM C-39)
5ampfe 6Vo: 896[]
Cylinder Cylinder X-5ec Tata1 Fracture Date Age Camp
!D Diameter Area Laad Type Tested Tested Strength
{inches} (sq in) (Ihs) (days) tpsi)
5960 6 01 28.37 109000 ConelShear 09r05r01 7 3840
8960 6.02 28.46 126000 Gone 09125101 28 4430
8960 6.02 28 46 129000 Cvne 09126101 28 4530
ce: Central Pre Mix
Reviewed E3y:
fpAkO • WASHINGTDN • QREGON • WYOMING o MONTANA r UTAH + NEVAOA
- DAILY OBSEFtWATION DIARy
~ i~'f(~SOPi EfigIf~ee ~5, Inc. PROJECT T1TLE 3~/9rt1-, 4E
PAOJECT N0.
OAY: OATE: ! -Z ~ - o I WOAK PER100 ~ . TO 4
i
wEwTtiEA OvtV-c.4I+ TEmw. mwX 611 'f: MIN 'f: 1NECIHIATIOM
ONOuND COMCITIOML -
NuM8FR Ah+D CLASS OF PERSONHtEL EeAtL01/ED:
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NO. I DESCRIP710N ~ 512E/CAIACITY ~ nAi OIfR
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.
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S i' FR ~ i 3 .
~ GEfl7ECHHICAL ENGINEERIHG 8 1ARTERIALS TES7ING
1620 N NSamer Rd, Buildmg C. Suite 100, Spokanfi, WA 59216 Septernber 17, 2001
509 891-1804 ! Fak 569 691-2012
Client No SIIYJENG
Praject No S010097-1
ReferenGe No 5L9279
Mr. Chuck Siii}psvn
Simpsan Engineers, Inc
909N Argonne Road
Spakane, WA 99212-2789
Project Ridgemont Estates
T}ate ReceiVed September 13, 2001
Date Tested September 13, 2001
Description. G1ass A
Source: Suiliuan
Lacation• 2 1" Caurt. 208 Tons
AASHTf] T-27
SLE'VE SIZE I °lo PAS'SIlITG ~ SPECS
3I4" 144 f 99-100
112" 94 90-140
3rsT3 I 78 75-90
114" ~ 59 ~ 55-75
No 4
No 10 ~ 33 ~ 30-42
No. 40 r 14 ~ ] l-24
Na.204 ~ 6.0 3-7
AASHTO T-308
Percent Asphalt hy Weight of Mix = 5 4Q°/Q
AASHTO T-209
Maximurn 'I'heoretical (Rice) Specific GraVity = 155 pcf
Sincerely,
s3rA,
Chris McKissen
Laboratary Supervisar
IEYAHQ o WASWINGTON • OREGDN • NIYpMING • MONTANA • UTAH 6 NEVApA
OEOTECHNICAL ENOINEERINO 8 MATBRIAlB TESTINp
1620 N Mamer Rd, BuildtM C, Swte 100, Spoksne, WA 99216
509 891-1904 / Fax 509 891-2012
Project Daily Report
Mr. Chuck Simpson
Simpson Engineers
909 N Argonne Rd
Spokane, WA 99212-2789 Project Name: Ridgemont Estates
Date: 09/ 12/O 1
Client No.: SIMENG
Pruject No.: 5010097-1
Daily No.: 11168
Permit No.:
Address: 2151 Ave and Pioneer
Inspection: Asphalt Compaction
Personnel: Gerry Gray
Page ] of 2
Narrative: Performed asphalt compaction monitoring and testing of the Class A ACP mix.
Asphalt was placed along 2151 Court and Pioneer Road. Test results after finisll
rolling ranged from 93% to 94%. A sample of the inaterial was taken to the
Strata laboratory for oil content, gradation and Rice density.
Sincere(y,
S1'RATA, INC.
r
Rick Woodworth
Testing Services Manager
Distribution:
IDAHO WASHINGTON • OREGON • WYOMING • MONTANA UTAH NEVADA
1 hJl.._i=h m D f=VE3 F::a " i=h LT r_~ n ~
1-= ,_'~r 1 1I E~ R C] 1=t iD w IA Y tcTk v E:.- ~FD'n K 0-4 P4 E: W i=1 ~ "9'~2: 1 ~
t5 ID `0 -Mi Z3 CEP 57
,T u b
Infn:
SNIP 21ST. R F'IC]iVEER
'UST: TUPPER
T❑ :
Job: 0021455 Pi7 :
Time TYate Rlant Cus IO Tkt# Pdt Id Rraduct Truck
12:09 09I12I01 PL1 0021455 018770 12OFt GLA55 A W/15% 471
)R[]DLJGT NAME #LOALlS - ACCLIMLJLATED Tf7TAL TRUCK WE IGHTS
CLASS A Wf 15% GROSS: TARE. NE7:
001°0020. 000 000-0000. 000 000-0000. 000 32.910 TN 12.910 TN 2Z. 000 TN
65820 lb 25820 lb 40000 lb
000--0000. 000-0000. 0O0 000-0000. ~00
:YGHMRS7ER: GOSLZNE/SILVRAIVTS
7r°iVer: F. COX
~ • ~ . ,r
1 l c3 1 L- ca c-a dc3 ! ~a t
Load Total: 40000
IPi LSEN 114 I~ n!E3 !D' " A 1_... T C~ Cl ~
n FZ C3121h n W F4 Y ALa'~e
F=N " F ; f=1 P4 E-= w F% - C-3113 iR 1 92
Z5 Q~ IC3 --zs Z3 4- iEt C=21 us
Job
Info:
CLiST s TLIPPER 5H I P 21ST. & PI OIVEER
TO:
.TQh. 0021455 P[]:
Time Date Plan't Cus ID Ykt# Pdt id P'r•oduct Triack
15:25 09112/01 PL1 0021455 018795 12OR CLASS A W/15% 402
;PROD1JCT NAME #LflADS - ACCUMULATEfl TOTAL TRUCK WEIGHTS
CLA5S A WI 15% GRD s5 : TARE : IVET :
022-0441. 530 000-0000.000 000-0000. 000 32. 71 0 TIV 12.460 TN 20. ;230 TN
65420 1 b 24960 lb 40450 1 b
000-0000. ~00 000--0000. 000 000-0000, 4+0@
,.'71GHMASTER: BC35LIEVE/SILVRANTS
_ ive r s L. HOOD
S:L I c~ ~ L_.. cr ca dca u-b
s • a ; •
} . ,
:
Laacl Tota1 a 40460
StI'a$7, I'riC.
_ F1e1d DeIiS1~ ~~~t RC~ort
Rcport Ncr 11168 E'age 2 af 2
Project: RidgeFnant I Project No.: 51IvfENG S[316097-]
~ I]ate: 01t12101 ~ Weatfier: ~ Test Methdd Nuclear
Personne@. Gerry Gray
General Contrac[or: ~ 5uperintendeilt:
' CartEirvcark, +Cantractor: ~ Forenian:
STA QFFSET 12EAD1NGS AVG. 215' Ccaut-t and Pia«eci-
, DEPTH Sta 1+00 to Sta 1 G+00
21 " Court 5' right af centerline. 145.7 145,9 Contral Lot No.: I
T~n~: 4~C}
Sta 4+00 146.2
I 2 l"" Cour~ 144.8 Class: ~1 Sufllivar~
Sta 2+10 left centerline. 145.1 ~`~4.~ Std. Deiisity: 145.3 pcf
Fioiieer 146.1 Kice Density: 154.1 pcf
~ Sta 3+00 right of centeriine. 145.0 I 145.5 Air 1`enip 83°F
Pivneer g' leffi of centerline. 144.8 145.5
` Sta 5+25 146.2
Fioneer 3' right af Genterline. 145.1 144.9
Sia 7+25 144.8
~ AvG. ~ 145.3 ~ 94°/Q
!
~ [3L~TECH1fICM1L Er+GIwEERrsR ~ ~hTQR1AL6 T~6TIN6
• '1 ~ . > ~ ' .
~ . ~~uyT~;.-~ r- • : : ~ . OAILY `OBSE~IY~TION
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~ _ , _ . . . - . . _ . ,
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, 1 _irnpsQI;nqine¢rs,--inc. PAOJECT ~TiTLE . - _ • .
. ~ , rRO4CT- N0.
, ; ' ' _ ,';2%Tr"` -~t•---"_ ` . ~ ° , ' ' . . H ,.01
• ' OwY: ' ~ OATE: 4 I .r•-°1: - • WOAK PEBIGO , : : a T0, r. a~. , . .
. ` .wEATMEA~Uhn : ..TEMP. W►X' ~~'F:• 1AIN~~F: ~ . PRFCAPITATWN. ~.~.Q,nc~. ,
, - - , - . • - • • • •ONOUND COMDITIOMi . • ~'~r~~
~.NUAitdEEi AND;`C4AS5 OF rERSOlititEL'E1AtLOYEOi . • , , . , . . . ~
, ~ . . ~ -j ~ ` - , . . ' ' . ' ' • . .
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. ' . • I.U►JOA 'EoUIph1E1dT•ON IPNOJECT - _ . - , .
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S i R ~ i 2►
GEQTECHNICAt, ENGINEERING 8 R1A7ERIAL5 TESTIN.r.,
1626 N hlBmer Rd , Budding G Suite lpp, Spakane, WA 99216
509 891-1904 1 FcX 549 891-2052
CONCRETE CYLIN[3ER TE5T REPQFtT
- RepvrC to. Mr. Chuck 5impson Report Na 11106
5impsora Engineers Date 09!11101
909 N Argonne Rd Client Na • SIMENG
Spokane WA 99212 2789 Project No ' S01 0Q97-1
Projecf Ridgerriant Estates Permit Na -
AaTdress 21 st Ave arsd Pioneer
i Contraetor Bacan Concrete Inc
Placement Locatian. Curb north side
MATERIALS AND MIX DA7A
Reparted by: Central Pre Mix Concrete Supplier• Central Pre Mix
Vlllix No, 321112 Methad of fVlixing,
SackslCY. _ Ag9regate Source°
Gemant 5.75 sk Water 5ource:
Admixkures. MB AE 90
REQUiREp STF2ENGTM, PSI
SPECIF'fGATIQNS 7 Qay.
Slurnp, inche5. 2$ Clay 3040
Air Content, °Io, '
~ FlELQ TEST DATA ~
51urnp, inches 114" (ASTM G-143) Truck No.: 921
Air Content, °/0 51 (pSTNN C-231 ) Ticket Na : 110751
Unit Weight, pcf' (ASTM C-138) TEme Batched 823 AM
CQf1C. TedTlp °F 20 (ASTM C-1064) No Cl'represented
Air Temp, °F. $1 Water Added, gal
Cancrete SampYed (ASTM C-172), Gylinder Cunng (ASTM C-31)
Tested & GyEinders Cas# (ASTM C-31) F!e1d Cure Dayg.
Dake Cast 08129101 at Temp Range, °F
7irne 9 00 AM Lab Cured fram:
BY ❑ate Received 08130101
~ LABORATt]RY TEST DATA ~
(f15TM C-39)
_
Sample No.° 8950
,
Cylinder Cylinder }4-5ec Total Fracture Date Age Gamp
EQ Diametes Rrea Load Type Tested Tested Strength
{mches} (sq in) (Ibs) (daYs) (Psi)
8960 6.01 28.37 109000 CanelShear 09105101 7 3840
~
Reviewed By
IOAHD • WASHINGTOhP p#IEGpN • WYDMING • MONFANA o U7AH • NEVA40.
T m C-:hL T C-bl
~ nE67ECHNIqA4 CN41N28REN4 & uAyepIRLg TEBTlNS}
1620 W IMaRIer Rd . 9wWing C. Suite 100, Spokarm, 1NA 99216
505 891-19p4 f Fgx `,A9 891-2042
Project Daily Repart
Mr. ChiZCk Sirnpson
Simpson Engineers
909 N Argonne Rd
- Spokane, VVA 99212-27$9
Project Name: Ridgemant Estates
Date: 09111101
Glient No.: 5TMENG
Praject No : S{]10097-I
Daily Nu.; 11442
Perrrtit No..
Address: 2 1" Ave and Piflneer
Fnspecfion; Asphalt Compactiaii
Persannel: Jaclc Lamb
Narrative: Arrived on siie at $;20 a.m. far pre-scheduled 8:30 a.m. asphalt compaction
tesiing.
Tliere was no one an site and no equipment. Waited until 5:40 a.m and then
rehirned to Strata's 1abaratory where phone call was made finding out that
paV1l1g had beeI1 CaI1Celed.
NC]TE: Possible backcharge. No one infarmed Strata of cancellation,
Sincerely=
STRATA, IIVC.
~
, Rick Wvodworth
' Tesfing Services Manager
_ Distribution:
4DAMCY WRSHINGTC7tJ OF2EGC}N VilYnMING MON7ANA UTAH NEVADA
i
AM AvPRZfZ 75
7-~
IO: Z5
_ AIUb 7"J/
Z! ~ ' .
f r
-574_
Sol
~~<;~~~~r~ . ~ _ -
OF
r -
I
- - -
- ~ - - - -
i
' ~ - - -
~
~
~ - - - - - - - - - -
~
- DAlLY 065F-RVATIaAT pAf "
tT'` J( l~_ ~
~ ~?1 "~k ~
s1 ~mpson 'E~3g' ~neet~, I~'ic, P~CsE~ nT"
pROJECr Ha 1--,`714
4 ~-~7 c~t rra~~c rf~ic~t~~-~~ ; Tr~
oA~r. ~swrr:
f~ • ' ~ i~~F~
TEMP. HAX f: 11i1N F: t~G:~dTdY►4F1
• cixouHB eioNalfioxs
NUWflfR A#iCs CLASS Qf P£li5dNkEL EMPLOtlIt3:
m
~ MA,.►aR EQUopMFHt ON PaaaECr r
~NO I ~ES~Rir7iDr~ ~ 5~2ErC~rwG~'i~d f nHS OPfA ~
I ~ I
wOArc wcCOWLssKEn r00wr: . 7 A)ZAP/00-,D Ar
:~z~`'r*~~ .~~"~,~i~~ ~F` ~r.~~~ ~I~~'~'~ ~r.~.~/ ?"r~,~ ✓~.4sx.~l~°~ la~--5 7"/~;~ ~~.~.~'Jh/,~
f~~T !'~O;r' ~'.rW 7F=~67"`_ ,
CA) 7fr~?''
151"Ir ANT] ~',~~•Sl~~~"~ Ts!-~~ ~if'~ ^F- AA.1'Y <n2WE=,P
f't'II~~ ~?SG~.~a~~' '7'" • .
r
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. I
Spokane CQUnty, YVaslewa3erR+lansrgemenp
120 67 E Empire Way
Spokane, WA 99206
Tel 50 B 477 i R@9, Fax 508 477 6998
Inspectivn repvrt
Date i191Ck7l20C11 ~ P P 45clear dry f Oseanar: ~ section~numtaer ~ rl gemont Ei tes
_ Plaronln # I Truck FEushin date Preset CPeaned• R~d~
pe 1423 B2 1 u~i1T I g 0
Town spokane IlM1ap #1 tv'd lgth° 212.2 FT
5taeet; 21 st ct Map #2• MH: 155.5127.3
5iluatiran. no data Tape 1042 MH_ 1581121 3
' Reason ior inspection pre-pave inspeCdan Diame[ea: 8
- 5eclion Type• wtastewater Material pve Length
PrateCtidrl:
Gnd. 25642 File # 1423
• Remark:
9;475 dist code abserNation cnunter phnta ra#e
ti
p,~~ -
1 129
ti. w• 650 ST 5tart of suruey []0•00•16 0
.25.70 13E Du#rfs, cfear+lng r7eed~a# i:U-Di r#S 3
42 2a T Tee, a2 o'~c~aC , diameter 4 in a[?.01.59 0
43,60 r ree, al 10 o'clock, diameler 4 Qn c3D 02 25 Q
INy •o I
~ r~
CVUC(4~ q~ f-1~s PAVG Reftwr Foe YOtlra SL
,
~ Tk Tc,JU LOCAT100s. 'u►lO 126(DHP4"T~~ 134,
,
I?6 - TV6 . Pa0z -o P441plr, , i rA cAW oQw 5
; i ~ ~~~~►wt~ ~ F~w~t~. r~ eAW, r_rn~U A0.1'DS T6
lu Cupm~ 5ffFaa.: #005rt edv*vM14 -,-'V.
122 61] T Tee, a! 02 o'clock, diamePer d in 00:05' 7 ~
~ ~
r°
;"_~124.30 T Tee, at 10 o'clock, dlameter 41n 06.06.45 0
6E"r ~~15 loai b 'ro Co u T9jsc=.
~ - - - - ,
i ~
- ~
498 40 7 Tee, at 02 o'clock, diameter 4[n 000913 0
200.40 7 7ee. at 10 o'clock, diameter 4€n 001006 0
1 .3 232_20 FN Frnish survey 04-11 13 a
-2fT - - • 1Zif`I Jti.Lld!!O >iclS Wd60:21 10f TI d35
zO' d z66 s1?1t?9st76es 9z:ET reOE-Iti-d3s
- At, Spckane GQUnf?, Waslswa[erMaaagemenf
t~"~ E Empir€ Way
5pokane, WA 99206
• Te6 598 977 1864, FAa 509.477,&B98
Inspectian repvrt ~ Date Projec# Weathev t7perafor section num4er Sectlan fJame.
0910Tl2001 ~ fp 45 ~ clear dry ~ sean ~ Z
Plannfn Truck: Flushin ~laRe• Preset- Cfeaned Grade:
Re 1423 82 u' 0~` I ~ I I 0
7o4vn, spo&ane Map #1• tvjd [gth: 225,6 FT
I SfreeL 21 s4 et Map #2 MFi• 156 2121.3
5stuation• nv daha 1'ape 1042 MH' 156.9121.9
Reason far inspection; pr$-pade inspectian Diameter. 9
5ectian Type uvastewater Material, pvc Length
Pratectlon-
Grrd 25642 File 5+123
~ Remark
1:525 dist cade abservatinn counter phnto rate
" riD DE DpFsris, crean;np DreeVvud U0, 13:03 3
r~ . .
54.00 T Tee, at 02 o`clock, dkameter 4 m 00•13•48 p
5570 T Tse, at 09 a'ciock, diameler 4in 00.1415 p
~ I'~
}
14350 T Tea, at 02 o clack, dlamekar 3 in 00 18;18 q
144 90 T Yee, a! ❑9 o clqGk, diametar 4 in Oa 18 57 p
a:
i ' -
V .4
i
ptv
224.20
EU 5"all swale 00'22:34' 2
1"91_2`~.
~.225 60 MH an17 00.23 03 p
' 2/2 ' d • - - - `l I iCl AihlD Ad5 WcAT. 2T T0 r TT d3S
~ DAlLY 08SERV~~ON DlARY
Q'56 ~~~~~~eiz, Pfi CJ ECz TI7L-l ~~•~~r~D~ ~s~~-~~~ ~
PRasF-C-r No. ~
Dr,Yc 'T'fi.rA rs(" DwTg: WaRX PERiOD 7 TO
J
- WEA'~~~R 7Estf'. ~Ax 4'5 'F: 11~yA1~~ `F: PfiP:C3PIZAYU]M `~a9~~•
G740LENq
NultB~Eii ArrD CLA.= OF yp¢fiS4wlyCtL EMPLOVIL1;
4-
,W.ut1R EaLJlPiAEHT am FR01ECT . ~
~ uC] N d]ESCRatYlON ' S17ElCAPACiT`r' ~.MRi OPER J
<
Drrj Ge..SSrsryn
Wt]Rb[ .l.GCCS"PL1ShEi'+ 7Q['AY: p f'1 f t~ w d ~1 S t7
i [ ( )
cd C ca ~"9 c~ c~ ! .c ~ c~ r^ ~~+~..e c... fL ~ ~ ~ ~>•i s~~, 1' P
t, ~ ~t f f
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~ 4E07ECHN14.4L ENi;1tJEERIM4 A MRTERIALB TE$7Iryp
' 1620 hf Mamer Rd, 8uik3ing C. Suite 100, Spokane, WA 89216
54N 89 1 -lsoa / Fax svs 891-2092
Project I]aily Report
NN[r. Chuck Simpson
Simpsvn Engineers
909 N Argonne Rd
5pakane, WA 99212-2789
k'roject Narne- Ridgernoizk Estales
I7ate 09I06f01
Client No.: STMENG
P'raject No.: S010097-1
Daily Na.: 11 365
Permit Na.. •
Address: 2 1 " Ave and Pioiieer
Inspectivn: Compacfiion
Fersonnel: Jack Lamb
Page 1 of 2
Narrative: Ferform,ed comgaetion tests of raadway base niaterial using proctor by Spokane
CauntylCSTC with cancrete gacindings at 130.8 pc£ at 99°/v mvisti.are.
Started iesting 25' south taf anterseCtion 4f 215` Avenue and prcrceeded sauth and
then west in#a culdesac See aitached fur test locations and results.
5incerely,
STRd 'h J,^A' INC.
Rick Waadworth
Te5ting Services Maliager
Distributaon:
~I
IDA41D WASHING`CON OFiEGQN W!YOMING MDNTANA l1TAH iVEVRQA
r' =LD DEN59TY TEST REPURT
Fieport N0 11365
ct Ridgemant Estates IProject No SiMENG S010097-1
ate 09106101 lWeather Clear ITest Method' Nuclear
tion Roadway - Base pF Psvneer
ersor+nel
,:ra! Cantractor ISupenntendent
arthwork Cantractvr I Foreman
-st Prvctar Prahe Test Mvisture Te5t Dry QenSiky Percent
iber - 7est Lvcatian Elewation` Number Depth Cantent % pcf Compaction Remarks
25'svuth of intsr5ection of 21st and
I Rivneer, cen4er of street Base 6" 92 1272 97% 7" Thick Base
Apprqximately 100' south of #1, 9'
2 west of east curb Base 6" 8 0 1266 97°/0
Appraximately 100" south of #2, 8'
5 east of west curb. 6ase 5" 8 6 1271) 97%
4 Entersection of end culdesac Base 6" 7,5 1244 ~ 95°.6
30' wesi of into culdesac, 10' south of
a nvrth curb Base fi" 8.1 1288 98%
Apprvxirnatsly 10 0' west of #5, S'
5 north of south cueb 8asa 8" 7 0 1263 97°Io
r4pproximately 400' west of #6, -
7 center of street Base f" S 8 1272 97°/u
Culdesac turn-around, north sida, 30' -
3 svuth of north curb. Base fi" ' 6.6 1259 36%
Culdesac turn-around, 10' norfh of
9 sauth curb gase fi" 7 3 1261 86%
-)ctoe NEaximum Dry Opt+mum Maisture °lo Compaetion MethQd
nber Saip pescrdptian C]ensity Content Required StandardlMadified
1 I 5pokane Counky CSFC wl CAncrete Grinding5 ~ 1308 I 139 ~ 95 ~ T-780 D
I I I _ 4
I I I ~ ~
* FG = FrrnsFr CCrarie 8G = Below Grade SG = Subgrsde 80F = 8at[am of Fovtirzg
~
S i Fit Ch T 3
~ OgOiEC-iCn4 @k61HEERiN~ 6 NATEA-$ TEBYiNa
7629 H Mamer Rd, Bwbing C, Sufte 1OD, SpQkene, WA 992 16
509 891-5904 1 FBx 509 891-2012
DA1LY 08,5EDVA f3uN DLAF3y
~ ~~~~~eea, PROa~~ ~TLE -q 'P~~
~Ro,aEcT No.
DATE: ""T-5c51 4ATi3Ait PER10L~ ~.a, ao
1~9l ewr.4> ~ MA..azZY
~►,~E aT tx~ ~1,•~°~~*r vEMP, raAx
4~+aur~~ cDa,~ir~ro~~
htU3~i8£A R.iaC CL.►5S i]F PEA5OrdArEL EWLOY19C3;
- - ~ . ~
4~. 74 'S, I 7~. 7J 7
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I _ _
!
5 i r~ ?s i r~
- J O@OTECHNIGAL Eltl61NEgq1l.1[3 a[WATBRIAL6 YESTING
~
1820 N Mamar As!, Hudding G, 9uite I04, Spokane, WA 99216
505 891-19041 Fax 569 5B7-2012
' P'roject I)aily Report
' Mr. Chuck Simpson
Sitnpson Engineers
949 N ArgQnne Rd
Spokane, WA 99212-2789
1'roject Narrie: 1Zidgemant Estates
T]ate: 49l 041 U 1
Ccient No.: SIMENG
Praject Na.: S010097-1
, L3aily No.: 11413
Permit Np.:
Address 2 T 5i Ave snd Pioneer
Inspection: Campactian
Personnel: Scott Cron
Page 1 of 2
Narrative: 5irata tesfied subgrade on Pioneer frarn 5ta 19+60 ta 15+80 2 1 ' Ccaurt frorn
Sta 5+70 ta 9+60 approxima#eAy eVexy 140 Zinear feet, Test results exceeded
the minimum 95% af ivlod'dfied F'roctnr.
Sincerely,
STRATA, CNC.
r
a
Rick Waodworth
_ Testing Services Manager
Distributicsn.
i
IDAHO WASHINGTpN CJREGGhi WYQMING MONTANA UTAFi NEVAC]A
Strafia, IrnC.
FieId Density Test Report
3teport Na 11413 Page 2 a£ 2
Praject: Ridgemvnt EsCates 'd Project Nn.: SIMENG S{]10497-1 ~
Gate 09I04101 ~'Weather: Clear ~ Test Meth4d' Nuclear
Location 5ubgrade
Personnef. SecaTt CCon ,
General Contractor. ~ Superintendent;
Earthwark Contractor: Inland ,4sphalt ~ Fareman: Gary
~
; Tesm ~ Test l,ncatson I F~levatian * Practaa Prnbe ~ Test d~taist I`~'est ~7ry I Percent I Remurks
Nutnher I+fumber , L7epth Cantent % Denssty pcf Compactinn
1 Pioneer Sta 19}60 at centerEine ~ SG 1 b" 3.6 I 137.2 I 95 ~
2 Pianeer Sta 18+65 at 5' leEt of 5G ] 6" 2.4 138.4 96
ceritLrl'm~.
3 Pioneer Sta 17+55 at 2' rig'hk of SG 1 6" 3 1 137 3 95
~ centerlcne,
4 Piorteer Sta 16+50 at 4' [eft of 5G l 6" 2.3 1380 96
eenterline.
S I Pioneer Sta l S+BQ at centerline I SG , I 1 ~ 6" 2.6 I 136.1 I 45 I
6 21' Court Sta 5+70 at 3' right of SCi 1 6" 3.0 137.9 95
centerline
7 21 Court ata 6+80 at 7' left of SG 1 6" 27 136.4 95
,
centerline.
$ 21" Caurt Sta 8-1-00 ar 6' right oF SG 1 6" 3.5 1363 95
centerl ine
9 215' Court Sta 9+05 at 5' lefr oF sG 1 G" , 3.3 136.6 95
centerhne.
10 21;` Court Sta 9+60 at 4' right of 5Cr 1 b" 3 2 , 1370 95
centerlfne
I ! I I ~ I I
I ~ : I ~ I I
I I I I I I ~
I I I I I I I
~ ~ I I I I I
Proctor Soil Qescription Maximum flptimum % CQmpaGtion N1efhod '
Numher Dr}a T?enssty Iu(nistuce Required StandardlModified
Content
[ ~ Brawn Srlty Sand witti Grave] ~ 144.0 ~ fi.[i 1 95 ~ T-180
p I I I I
- 3 I I I ~
* FG = Frnish Gracle BG = Belotiv Crrrde SG = Subgrade BOF W Botcoin ojFootijrg
~
c- B 6 T a
~ dEOTgS,.'riryICAL ENqIN@EAIRIO a RLATEaIAL9 TEST1NG
1620 N MarrrBr Rd, 6udding C. Sude 10fJ, Spo"ne, WA 59216
i 509 891-19041 Fex 509 851-2012
Pr0ject DaZly RepUrt
- Mr. Chuck Simps4n
Simpson Engineers
; 909 N Arganne Rd
5pokane; WA 99212-2789
Project Name: Ridgemont Estates
_ Date: 08f30101
Client No.: SIMENG
Praject Nv.. 5010097-1
Daily No.: 113349
Permit 1Vo..
.4ddress• 21 ' Ave and Pioneer
Inspection: Cyiinder Pick-Up
Personnel Chris IVIcK.issen
Narrative: Ficked up eylinders cast 08f29101 and transported to Strata Zab for cezring and
testiang.
Sincerely>
STRATA, INC.
Rick Wocrdwarth
Testing Services Manager
ni5tributian:
IDAF-fp WASHINGTON UREGON • WYOfullNG, MDNTAfVR L9TAH - NEVAQ,A
!
_ T r°~ 2a T e3
~ GEOTEC}iNICAL EN01ltlEERIN0 d I.iRYEFElAL3 TE&T.)YQ
1620 N Mamsr Rd , Buildmg C, Sufte 100, Spokane WA 99216
509 B97•1904 1 Fax5p9 891•2012
Prvject Daily Report
Mr. Ghuck Sirnpson
Simpson Engineers
~ 909 N Argonrze Rd
Spakane, WA 99212-2789
Project,Name. kidgernont Estates
Date• 08129101
' Client No.: SIMENG
, F'rvject i4o.: S016097-1
~ Dai1y No.: 11106
Permit No.:
~ A.ddress: 21' Ave and Picrneex
Inspection: Cancrete
Persarunel: Chrzs McKissen .
Narrative: Observed the placemene vf concrete in the c.urbs. C3btained one sarnple flf triix
#32 i 112 fram the end of the chute. Results of testing as fallows: spump si'4", air
content 5.16/0, anbient tezatp 81°F, eoncrete texnp 70°F. Cast ane set of ftaur
cyPinders.
S1r]G4Tel,V r
c7 1 E\!'!, iA3 11 V l..
Rick Wosaawarth
Testing Services Manager
Distrilaution.
IDAfiO • WASHINGTON -f]FtEGON WYOMIAlG Mf3NTAfVA UTAH NEVADA
- DAl1.3f 055E#iVA77ON D1ARy
~ ~mp~n E;nq;~neea, Inc, PAa.lF-CT ,TiTLE
~
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~
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C3ESCiitfTlaN SiMCwPdC1T-v ~ hRi OPER ~
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W4RlL IuGCC3A1PL1SHED TODAY: ~ ~ -
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~ QEOYECHNICAL LNR1NEEsiINg & MATBRiAkB TE@TIMO
1820 PA Mamer Rd, f7uJdmg C. $vilo 1OD, 5pakane, WA 99216
5G9 899 -195?d 1 Fax 509 891-2012
p°1'Q]eCt Da1~~ ~epfli't
Mr. ChuGlc Siiitipsoii
5ijnpson Engineei-s
9091V ArgoPUie R.d
_ Spokane, 'VV'A 99212-2789
F'roject !N'anie Ridgeniont Estates
- Date: 08116f01
- Client No.: SIMENCr
Project No.: 5010097-1
Daily Nu. 11232
Permit No.:
Address: 21 " ELve and Pioneer
Inspectiern: Compactiafli
Personnel: Danriy Sclunitz
T'age 1 of 2
Narratiwe: A.M. - Strata performed caiiipaction tests vn waterline backf 11 alC117g P1C1neeI'
between Sta 17+83 to St I9+02 and at Pioneer and 215i Court. See att2cl7ed for
test locataons and results.
C]btained a sarnple of brown siity sandy gravel from an area adjacent ta test 41
at twa feet belovv subgrade and transported t4 Strata lab fvr testing.
P.M. -Returned tQ cantinue cQnzpactian testing along 215E Court and at Sta
16+33 alang Pioizeer ftoad on waterline baclcfiIl. 5ee attaclied for test locntions
aiid resuIts.
S111CePe1y,
STItATA, INC.
Rick Woodworth
~ Testiilg Senrvices Mariager
- Distributiaii:
IDAHO - WF1SFfING1'ON ❑REGC}A1 • VW{}MfNG MONTAPNA UTAH NEVACIA
r'
i ~
MOISTL1RE-DENSI'I'Y RELATIuNSHI~ CURVE
AA5HTC3 T-180
Methvd C
, Project: Ridgemant 9th Addition GRAaING ANALY515
Client: Simgscan Engineers SCREEId S17-E % PRSSiNG ASTES7ED
- File Nane- SIlIvIEN.C'r 5[}1OQ97-1 sirch
- Date Tested• August 16, 2001 a irch
3 inch
Tested By: E. Bakie z incn 100
Sannple Nurxpher: 5L8897 ara irtcra 77 100
#a ~~een
Sample Locatioaa: Along 21 st Ct., -2" BSG
Sample Descriptian: Brvwn Sil#y SANT3 vvath Cravel
Correc#ecf Dry Density, pcf: 944.0
Maxirnum DDer~sit cF: 940.0 Carrected Maisture Cantent, 6.0
rY ~r P Goars+a,4ggregate c.orcection, 9[,: 23
Optimum Moisture Ct}ntBn#j °lo: 6.0 Sulk SRecifiC Graufty {assumsd} 2.65
178 I I I f I I I I I I I I I I li> Optimum Pvin#
tim ~ I I! PfoCtOrPflIntS
1741 I I I I I i I~~ i I ~ f( I I~
„af ~ I~~ I I I d I I I I d I I d I
1701 r I ! I f I ! I i I f 1 I I f I
,~_I f~l ~ I 1 l I I ~ 1 I I J 1 I
f N.1 I I I I I I i I Y I I
114 I I! 1 II I I I P IC f I I I f I I ~
162_
j6o _ i I I I'~.. I I ~ I I 1 I I I
f I f ! 4 't~_ I f 1 I I I I
I I I I i f'"t~ 12 1__ I___ 1 f f I P f I
, ---,54 I f ! ~ ~ I ~'f~..~~ I I I I I I I
~ ~,5z _I I I ~ I I ~ f I"'1~ ~~d ~ I I f
' _I i I f I I ~ I I``f~~~•~ I
I ! I I I I P I I I I P I I
„8_~
o~
„ I I__~ I f € I I I I I I`~T~ ~'-1 I I I I
Q„4_I I ! I R ~ I I I f I I"`~~ I I i I
142 I I f i I f I I I I~. ! I d
14~a v1 ~ ~ k ~ I f ~ 1!J
,30-~
134 _I f I ~ I~Y~I I I I'! E I
132- I f I I I I ~ I I~I
13a E I I I ;A
128 I I 1 1/` I ~ I i I I I I f 4.
,28-I
, ,2,1I I I P I I I Pf I I ~ I9 1 I
922 _1 1 ]1 1 1 1 ~ +1 !V 1 1 1f ~
120
~ as in 9~ ~ ~s ~a 4 45 so 5.6 6 6.5 70
7s g as so as 10
MQISTURE %
Reviewed By 5 i FR ~ i ~
6EOTEGiiNiCAL Efi61NEERINCi d k1A7EAlAl5 7ES7iWLi
e~~n~ i r r c~u~ vo. J4JSJ J1 zui ~ Y.
raELU C7EN5ITY TEST REP'OP'
~cpoR ;vo
I
~ Dule: ~ G [o Dayarwee1,: Weather: Tesl R'Itthvd: wuc6ar '
~ _ ~~1u Ft
Geaeral iCnairactar: L
Curshwork Coatractor: Forcrmsn:
Test Froctor PF644 Tnt IV[nist Test f?ry Percent
Numbtr Tcsi'L ~tian E1ev Numbcr pepth Caascnt % derisitp ptf Cumpattiun Remarl~
c~. iw --5° I~rG q ?a ~ ~'f ~ f~ ~ l?o P
~ z,~ I-~-s~ rr 25 w4 b°`
~-.Sia rl. IU f6:}- LI
~ I _ I I ~ 1 I ~ I
'~j
l ~ Li te% iz
7A Ll~~.~.
9~
- ~ ~ I I + ~ I }
I E ~ ~ ~ ~ t
~ f I I i 1 I _l
~~aCtar 5ail Lleteripelon Maximum Optunum 9i, Campec:fan Meshad
NumbLe Dry Densifp h'[oissurc Contrnt Required Standar
I 6-Ei 9l 6rvi 4 ekvd }'4~aoC] f 110~0 1 !~Ie -I ~ 'r 180 ~
{ ~ - ~ I I I
5tca Ca RcgreypllCative: Signalurc: Page
~
, Strata, Inc,
j,ss 1620 N Mamer Rvad. #C 10(]. Spolsane, WA 99216
(509) 891-1904 Fax (509) 891-2012
AUG-17-2001 07:35 5098912012 57'r. P.02
Strata, Inc.
Field 17ensity Test Repart
9Zepart Nn 11232 f'age 2 QP2
- Prvject: Ridgemont Estates ~ f'roject No SIMENG 5010097-1
~ I)ate: 481I6f01 ~ Weather: Clear ~ Test Meihod. Nuclear
Locatioti; Waterline backfill along Pioneer Road anct 21" Court from Sta 16+33 to 19+02,
Personnel: I]anny Schmatx
~ Genera6 Cvntractor: ~ Superintendent
1:artlywvrk Contrac;sor- Eller ~Foeeman Jim
I'I'est Test Location I Elevatifln • IPrnctor I Probe ~ Test ~ioisZ I Tess 1]ry I Ferecnt fiemarks
Number Number 13epth Contcnt °/o Dcnsity pcf Compaction
1 Pioneer antl 2 1" Gouri at 45' west -3' 8897A 8" 5.9 1296 90
of fire hydrant
! 2 I Pioneer Road Sta 19+02. I SG I 8897A 3.9 126.9
i
3 Pioneer Road Sta 18+52 SG 8897A 8" 5 5 129.4 90
~ 4 I Pioneer Road Sia 17+83. 5G 8$97A 8" 4.2 128 7 89
I
S Pioneer aiid 2 1 " Court at 45' west SG 8$97A 8" 4 5 140.5 98
! ❑f fire hydrant.
6 Pioneer and 21 ' Caurt at 100' wesf 5G 8597 8" 4.0 1302 43 Less raGk
of test S.
1 7 Pioneer and 2151 Cour[ at 100' west SG 8897A 8" 62 1332 43
~ af test 6
8 I Pioneer Road 5ta 1 G+33. I SG I 8897 I 8" 6.6 127.5 .I 91 Less rock
~
I I
~ I I I ~ I I ~ ~
I I I I I I I I
~ I I
I I I I I I I
I Prvctvr 5Qi1 IJescripiion Maximum Optimum °Ja Coiaipackian fvlethod
Number T3ry Density MnistLire Required SiandartL'Mod3rted
Content
8897 ~ Brawn Silty Sand witki Gravel ~ 1400 6.4 95 1 T-180
~ 8$97A w/ 23% + 3/4 ~ 144.0 6.o I I !
I I I 1 I
~ I I I ~ I f
* l- G = Fanrsh Gracle BG = Befaw Grerde SG = Sai6grade BDF = Bollaia7 af FQQting
STATEn~ENT page I
Strata, inc Scatement i]ate. 0$I02101
8653 West Haekaniore Qrive
F3aise, TD 83709 5ales,persnn Spokane
(208} 376-$200
~ STIViPSDN Et+TGINFERTN~'i CListamer No SIMENG
- 909 N A-RGDNNE CCDi]RT
SPCIKANE, WA 99212-2'789
000
' f3ATE REEERENCE LlESCRIPT[t3N Cf-IARGE CRE13[T BrILANCE
06i29/01 ~5u 1 u325-1N ft1T3GE1MONT ES'I'ATES 241.70 241.70
(3~
~ 1-246(
,
TO°rAL 241 .70
cuRRENT 30DaYs 45 oAvs 60 DAYs 90DAvS BALArreEDUE
000 241.70 0.00 0.00 000 241.70
I -
~
1
~ 6Empsan &n9ineers, Inc..
j CIVIC ENG1NEERS AND LAND SURVEY[3R5
N. 909 Argvnne Road - Spakanep iIVA 99212
' (509} 926-1322 • Fax: 926-1323
n I
TLJ'. t"._~ r~ r e~ rr ~r 5
~ ~Y F°~ "~s ~ t !rt b rT r ~ 1! ,n f'~~
J SUBJECT;
f ~
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,
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97I12A2001 16:45 5098912012 5fRA7A ING PAGE D1
~
s
~ GE(]'TECHNIGAL EnIG4NEER1NG 8 MATEFIlALS TES7tNG
FACSLMfLE TRANSMiT'CAL SHEEY
'fi7 ~ ~ FA[1M
C:UNt ts4Y. L7 ~
A"fE
' FAY NUMaER T[STAL NO C1F pnCES iNCLUOlNG CDV@ck,
1o2(o ° / 3d~ ~
PHUNE h'U4IBER• - -F[LE
gL TYt'E OF DQCUMftv'f 5EvT,
e.m'~%~
aQCUMENTS 5ENT AX 0 ~'In P~iRFL E2 VIr'~ FrU ES(
. 1
Z4iE5~M5 ARE 7RAN5MMEI) AS CFiECKED BELt7W,
❑ URGENT 0 FOft k~~MWfCt}M'vIENI' 0 PLEASF REPLY ~AS REQUE5YED C7 FOA APPRC3VAL
NClTESICC)MMENTS~
P`Y ~ c7~ q_,~ ~ ~ ~ ~ t3 ~ ~ 0 ~ i`~4. c ~ f C]t"'1 E.¢_. i ~C.~}~ L •
~i
iBdG N. YIAMEFt ftOAD. SUITE C•I4G
SPOffANE. Wk5F3fhlGTDN 49216
, PhIQNE: (509) 391•1964
FAX: (504) 391-2r312
4106
JUL-12-2001 11:53 5099912012 97% P_01
DAILY L]BSERVA7lON DU►RY
_ - - - - ~
~ ~~~son Enqlneers, IncF PFiajF-cr nT L E t ~7 -
PRQ.lECT NO. l 7;7r4
oAr: h141"DI-I IV DArIE: w9AK PERl4A TD
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I
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~trata, IIlc.
P'I'oject Dally RepQrt
i
Mr. Chuck Simpson
Simpson Engineers
, . 949 N Argonne Ftaad
' Spvkaile, WA 99212-2789
Project Narrte: Iiidgemont E stafies
Date: 6124101
' Client Na : SIMENG
_ Praject No.: 501 0097-1
Daily Nea.: 10409
- Perrnit No.:
Inspection: Compactivn
Personnel: 3ack Lamb
Page 1 a~ ~
Narrative S f RATA took compaction in sewer line trench at 2', 3', 4', and 5' elevations
; below subgrade as shQwn and nofied on attached soil carnpaction report form.
Did not have procior, sampled material being used to backfill and took it to
iaboratory to run proctor test.
Tn place paunds per cubic foot shown on repart fatm. WiII have to figure
percentages after proctnr fls run
Sincerely,
STRa4TA, TNC.
Riek Waodwarth
Testing Services Manager
Distribti2tion:
07112I2001 1e:45 5098912012 STRATp INC PAGE 02
Strata, Inc.
Prajeet DaaAy Repor#
Mz. Chuck Simgson
909 N Argonzte Raad
- - Svokane, WA 99212-2789
Project lvame: Ridgemant Estates
I7ate: ' 51201O 1
' Clzent No.: SIMENG
ProjectNv.: 5010097-1
~ Daily No : 10409
- Percnit Nv.;
; Inspectian: Compactian
F'ersonnel: 3ack Lamb
; Page Z of 2
Narrative: STRATA took compaction in 5ewer line trench at 2', 3', 4', and. 5" elevations
belvw subgrade as shown and nated an attached soil cvmgaction report form.
Did nat have proctor, sampled material bei.ng used to baekf'iIl anri tavk it to
labaratory ta tun proctar test.
In place pounds per cubic foot sb,own on repvrt fvrm. Will have to figure
percentages after proctor is nm.
Sinceraly,
STRATA, IIVC.
~
Rick Woadwarth
" TeSting 5 enjices -Manaaer
Distribution:
i
JUL-12-2801 21:54 5098912712 97% P.02
07I1212801 10:45 5e98912012 STRAiA ING
Strata, InC.
~ Field Demsity'Tesfi Report
Rcpon No. ! 0449 Pagc 2 oFZ
Praject: Ridgemant Estates, k'arest 97 1 ProjectNa.• SIMEN~'i S<`Jt C>-` 9 7_~ ~
Date: 612014I 1 VJeather: Clear ~Test Method: Nuelea.r ~
I,ocarion. Sewer Trcnsh ~
~ Per3vruiel' 7acle Lamb
~ General Cantractar: Supexirstendenc:
~ EartEiwork Cvntractor: Fareman: ~
Tm TestLacetion filevat.son' PrcFews FCahe TestMcist 'I'estf7a,y Pe3ctilt Rcmorics
~ Plumber Taumbrr I pepth Ganrent °!o AensEry pcf I Caaspacuan ~
1 Intersectian of sewer tiue aud 2' below 1 12" 5A 122.5 93
Piflneer manhole
COVCT
] a Intersectiou of sewer line and i' beiaw 1 12" 7.5 124.6 94
~ Pianeer manhole
co.•er
S Statiaa 9+40 3' below l 12" 6.3 125.1 94
subg€ade
2a Stauon 9~110, 90° curn 3' below 1 I2" 5.4 I29.6 98
subgrade
I .i StauQn 8+70 3' below 1 12" C 7 1296 98 suhgrade
3a 5taton 5+70, 90° turn 3' bclow 1 12" 7.1 ,125.3 95
subgrade
4 Stamon 7+54, 901, tura 4' below 1 12" 5.9 129.3 97
suhgrade
4a Station 7+$0, 90° zur'n 4' below 1 12" 6.8 125.3 95
subgrade
5 Scazivn 7+25 5' below I 12" 7.0 129.9 98
sutr_gmde
5z 5tatian 7+$0, 900 tuwn 5' belaw 1 Ei.I 127.7 95
subaracfe
~ I 1 I I
I ~ ~ I
I ~ ~ ! I
I I I I ! I I 1
I Prrscfor Svii I3escripcion MaYLmum DptLnuxa °Io CompaetiQn Method
Number T]y Density MaistuaD Required 5t2rsd-irr31'MadLfied
Content
Brown silry sand with gravel ~ 137.5 9.5 1 45 1 Modifed
la
~ Rock correcred + 146.0 ~ 6.5 95 Madifed
* FG _ Finisfa Grad'e BG = Below Grade 5G = Subgrade BOF = Bottom af F"onring
`
.TLIL-12-2034 11: 54 50 J89i 2012 p . 03
Strata, Inc.
Field Density Test Report
fiepnrt No 14409 F'age 2 of 2
Projeet: Ridgemont Estates, Forest 47 J Project No ; SIMENG S010097-] ~
Date 6f20141 ~Weaflher Clear ~ Test Method: Nuc[ear
- 4,acacion° 5ewec Trench
, Personnel Jaek Lamb
- ,eneral Cnntractor I SuperEntendent.
Earthwork Contractor• ~ Foreman
Test ~'fest Ldeation I Elevation Prnetvr I Probe ~ Test i~toist ~ Test ~lry ~ Percent I C~c¢narks
Aiumber ~ Number 6ep[h Content % I3ensiry pcf Compaction ~
1 Intersectioti aFsewer line and 2' Yaelar►+ 1 12" 6A 1226 93
F'ioneer manaiole
- cQver
- Z a InEersecTian of sewer line aiid 2' below 1 12" 7.5 1246 94
Fioneer mazihnle
cover
2 Station 9+00 3' below 1 17„ 6.3 1253 94
, subgrar3e
2a Station 9+(]0, 90° turn 3' belaw 1 12" 64 1296 98
subgrade
3 Station $+76 3' below 1 ➢2" 67 1296 98
subgrade
3a Station $+70, 9[}0 curn 3' bel4w 1 12" 7 l 125.3 95
sLjlagrade
4 Station 7t80, 90° turn 4' belaw 1 12" 5.9 1293 97
subgrade
4a Station 7+80, 90° turn 4' below 1 12" 1255 95
subgrade
5 Station 7+25 5' be1ow 1 12" 7.Q 129,9 98
stihgrade
5a Station 7+80, 90° turn S' belnw 1 12" b i 127.7 96
subgrade
~
I ~ I f I
Practor Sail I:lescriprion Maximvm f7ptimum % Campackion Method
Number Dry L]ertsity Moistuee Required StandardIModified
Content
1 ~ Brown silty sand w:th gravel ~ 137.5 1 9.5 1 JS 1 Modifed
la ~ FipcR carrected ~ 146.0 ~ 6.5 ~ 95 ~ ModEfied
* F+G = Finash Grade 13G = Below Grcrde ,SG =Subgrude Bt?F = Botlom af FaQrrng
MC)ISTIJR.e,-DENSITY RELA'TIG,4SHIP CURVE
AsrM D 1557
Method C .
GR4QING AIVALYSIS
ProjBCf: R,idgemont EStateS SCREEVd SIIE % PRSSING ASTESTEO
Client. Simpsan Engineess, Inc. s incn
File Name. SIlVIENG Sa10D97-P 4irr-n
; Date Tested Tune 24, 2001 2lnch 100
Testea By: E HakRe 3/4 Ench 72 100
- Sarnple Number: 5L8578 #4 screen
' Sarnple Location: Saurce Native Material (Sewer Lme Backfill)
- Sarcapte Description: Dark Brown Silty SAND with Grauel
, Corrected Dry aensity, pcf: 142.(]
' ~aximum pry+ ~e~sity, pcf : 134.5 Corrected MaiSture Cantent, °a: 5.0
GearBe Aggrsgate Gorrenfivn, 28
's~ D timurr~ Morst~are Cantent, °J~: 7.0 eufk Speeific GravEty (sssurrted) 2 55
i
, 178 O Optimum Point
~~e _ • Practor Points
,a4
i 172
1 70 ~
i66
78A
S B2-
160
15B
p
~ ~54 ,
zt50 ~
lPr ,ae
❑
146
~ 144-
a ie2_~ e
140
,sa
- 13e
~sa
132
13{1 - 01
128
12'a
122 - -
12[1
0 as io 15 2 zs 30 as 446 sa 55 6~.5 7 o 75 g as sa es 10 105 110 115 92
Mt]1STURE °Io
uevaewedBy • ~ ~S T R ~ i
6ElJTECHNiCRL £HGINEERlhC= & µpTeRIALS TES71M{}
~ DAIi.Y flaSErVA-710Fd OUR, r
inc ~ P~ca~~~ ~r~ ~
PRO.~ECT Nc+. f ~ 714
7 A ~
n~~: ~r~,~r~~•~ ' DAM buoax PERIgD - T a__
6'rEATttFR,S,A 4 Z 7L6rP. Ata►X 'F: 9i1N°f;
aMCiIJkC7
muLiaER AND CLaSS OF PERSOMwfL EMPs.aVIII:
~rOR- 5, .Zr~,~~r~~
kAA-QA Et3UiPUENT ❑k rHOJECT ~
~~,o ~ a~sc~►rri~r~ ~ s,z€~c~.rr.c~rr R n~~ npfR ~
- ~ ~ Ur~~'!_I-~~' :ff~~.~ i
lNORK ACCOAdPL15.HEL1 TT]GA'/: 7~
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PUT
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