Sullivan N 2010 Central Pre-Mix - Shop & Offices Add
~ % MRR-26-192 10:45 ID:DEPT OF BUILDINGS TEL N0:509-456-4703 #985 P01
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SPOKV COUNTY DEPARTMENT OF BU1lt-NQS
w.1909 BAOADWAY AVENUF ~
SPOKANE. WA$MINGTON @9Z80
(509) 486-3676 .
1 oenlty tRat 1 t+ave examined thla~erm~Vapptloationetete thet U+s~ntom+aUon eantsfns0 tn It end wbmitted by meormy mnt locompIlo wdp8rmlt/appt{aation isttue
and corroat, and autNorlie Spokane County to proaeed w1th procaflnp, In ad0ttton► I hsre msd and understand Ihs INBPECTION AEOUIREMENTB/NO?14E
provtelane inclu0ss heroin snd s9roe to compty wllh sama All Drovutons ot lavrs and ordinances 4ovemingthia typs ot wark wItl be aomplied tiith.rNether epWlled , f
hereinornot lundentendthettheluuancs otthlepermlVepplWa~lo~nendnrtyoubaequ0ntlnepeclron approvateorGeAlfioatesot0ceupincysheNno~by~a ~
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[evvs reyutatfnp aonetrucUon 'SfQNATURE OF ppat•!t`' brend fax tranamittai memo 7011 `OolPaWo k
OWNEA OR AGENT rom
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PFtOJECT NUMKEk= 9200607 APPLICATION DATEP d3/1 ?'/9,42 P'AGEivj4i `
TNIS IS NOT A' ~ERMIY
PENALTIES Wlt.l. BE ASSESSED FOf. COMMENCING WE?RK WITNOtJT APERMzT
SITEADDR~~S= S~OKANESWAL~~~16RD PARCEL4w 12543-9007
PEaMxT uSE= sTqRAGE BUiLDING ♦ CONTkOL. ROOM
PLAT$= 999999 P1.AT TJAMEm RANGE
BLdCK L° LqTo ZONEm MZ D I STOw HR/W~
~ QF BLD~S= 0000023~ DWEL.LI~GSffi A WIDWATER AI.ST oEP'THa
A jjTa bb1"4NjA~lAATE , ~'WQNE°' 509 534 2657
AnDR Sm SpOKA E 99X2.24 '
CnNTA,CT NAME= BYLF RtJNY~MU~t~N LE~Tm UNKN kIGHTm pUMK~ REA~~RUNKN9 4g~' 8236 ~
~+IJJl.AI~iG SETbACKS
BUILDING PERMIT
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GaNTaACTOC:= BOUTEN CONSTRUCTILIN COMP'ANY t~HOiVEw 509 535 3531 ~
STkE£1 m 627 K ~1APA S1'
ADDRESS= SPOK ANF_ WA 99220
k U ITW~ X A kWPODEL~ D1T QCHANSTQ~IESSEe
~3W ~E. W N ~S~ X ~ a 572 S Nu ~ N iki Ik PAkK I~lG~ N~~t~A ~ T I i~A'f m iV
DESCFt I P''T' Y pN GkOUP TYPE SQ FT VAl»UAT ION !
t;ONTROL. RM B-2 11N 372 11022.44
ITEM DESC:RYPT I ON RUANT ITY FEE AMiOlSNT
P~ANEREpiw%~ATION Y 13S Q/4~ ~-f
SYATC SIIR NA~IGE Y • '
CdUN?Y SU~GHAkGE Y ~4~ '
PERMxI" YYPL FEE AMCIUNT AMOUNT PAID AMOUNT OWING '
BurLDiNc PERMrr 251.55 .oo 254 .ss
• VV 251a&77 1 ~
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CENTRAL PRE-MIX/INLAND ASPHALT ; • ~"1992 '
New Shop Drainage Report
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Background:
A new shop is being constructed south of the existing shop at the Central Pre-Mix Plant
site on Sullivan Road. Other improvements to the site include paved parking for the
existmg and new shop faciirties. Drsinage faciidies are planned to handle the first 1/2-mch
of runoff, from the new paved areas, in grassed percolation swales.
Drainage Calculations:
Drainage Basin A, as shown on the attached plan, is the total drainage orea for these new
improvmenrts. As shown, two grassed percolation swales will be developed along the
south penmeter of the site to coilect, store and dispose of stormwater runoff. The
westerly swale wiii collect water from the new parking area and has a storage depth of
6-inches. The easteriy swale collects water from the new shop area and also has a
storage depth of 6-inches. These two swaies are piped together to handle the entire
basin runoff.
A summary of the drainage calculations are provided below The detailed calculations are
attached:
Impervious area in Basm A;
New Paving 57,025 S.F
Roafs (New Shop and New Addition to existing Shop) 81100 S F.
Existing Paving 13.750 SY
✓
Total Impervious Area 789875 S F-1 81 AC
Only the runoff from the new paving is being collected and stored in grassed swales
Collection of the roof drainage for the new shop and adddion to the existing shop is not
required as there is no electrical or mecharncal equipment on the roof d both roofs will
be of a rubberized material. The existing shop roof drainage is prese ly dtsposed of
through a drywell. The existing pa~nng, which drains onto the new pave ent is exempt
from being stored in a grass swale prior to disposal, as per discussion with County
Engmeering staff
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As shown on the attached rational formula input form, the drainage swales are required
to provide a ponding volume of 2,376.2 cubic feet (C F.). The proposed swates will
provide the following storage volumes•
West Swale 12 x 145 x.5 = 870 C F.f
East Swale (27 x 19 x.5)
(20 x 125 x.5) = 1.506.5 C. F.
Total Storage Volume = 2,376 5 C.F. ~
Disposai of stomnwater not stored in the swales vvill be through two Type "B" drywelis
installed in the easteriy swale As shown on the attached bowstring calcu(ation sheet, the
two swales and drywell, provide the storage and disposai capacities to handle the 10 year
des,gn flow from storms runoff.
The overflow pipe, between the west and east swales, has been sized to carry the peak
in flow to the west swale as 2.53 cubic feet per second from Subbasin A-1. The west
~swale will collect and store 870 C.F. of runoff prior ta discharging, through the overflow
2 pipe, to the swale. Subbasin A-1 consists of 33,825 S.F. of new paving. The minimum
~ east swale area completed for Subbasin A-1 is 1,409.5 C. F. (33,825 x.04167) The
'Njemaining 539.5 C. F of storage is provided by the east swaie.
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80NSTRINC METHOD
DETENTION BASIN DESICN
Ttme Incremeat (min) 6~
Time af Concentration (min) S
Outflow (c.f.s.) 2.0
Deaign year flov (yr.) / O
Area (acres) 2•3 0'~ Developed "C" factor .74
Area x "C" 70'7-
. #1 r 02 t 03 04 #S r 06 v7 ~
Time inc. Timc Inc. Inteasi[y Q dev. V in Y out Storabe
(min.) (sec.) (in./hr.) (c.f.e.) (cu. ft.) (cu. ft.) (cu. ft.)
U1 * 60) (A+C*03) (see belov) (outflow*l!2) (p5--=4)
:5- 16 V. 4 i I 2d.Z~ I ww ~
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~ za ~ / Zt>>O ~ 14 0- ~ 2,47 ~ 132 ~ 2¢ Qo ~ S t ~
I. 2 I o& ~ 3.300 ~ 3Coca 3 o a
I 30 oo I r. 04- ~ 1• 7-7 I 3367 ~ 3Goa I- 233 ~
I 39 ~ 2j00 ~ • 4t ~ ~-ss I 34- 13 4-?,ao I -W7
I 40 2Aco! • a2 ! 1• 4o I 3-0-3 ~ 4-bvo I- 12 9? I
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BONSTRINC METHOD 4 -l flv~U-,•v
DETENTION BASIN DESICN l°t l''& +oc S t5 "V
Time Increment (min) ~
Time of Concentcation (min)
OutElow (c.f.s.) (2- Sa
Oesign year flov (yc.)
Area (acres) Uf Developed "C" factoc , to$
A cea x "C" , •l 9~;&
T d 1 #2 t 03 r 04 T 05 06 !17 ~
Time Inc. Tiroe Inc. Inten6lty Q dev. Y in V out Storabe
(min.) (sec.) (in./hr.) (c.f.e.) (cu. ft.) (cu. ft.) (cu. ft.)
(Ol t 60) (A*C*03) (see beloW) ~ (outflow*82) (05-U6)
57 ~ '~Q► :~s• 16 Z .S3 ~ fD I ~ tffo tsey I
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15- oQ ~ I. 777 I 1.41 1413 ~ L zso a 3'7 ~
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r ° CENTRAL PRE-MIX/INLAND ASPHALT ~ APR )1992
New Shop Drainage Report
.
Background:
A new shop is bemg constructed south of the existing shop at the Central Pre-Mix Plant
site on Sullivan Road. Other improvemerrts to the site include paved parking for the
existing and new shop facilities. Drainage facilities are planned to handle the first 1/2-inch
of runoff, from the new paved areas, in grassed percolation swales.
Drainage Calculations:
Drainage Basin A, as shown on the attached plan, is the total drainage area for these new
improvments. As shown, two grassed percolation swales will be developed aiong the
south penmeter of the sde to collect, store and dispose of stormwater runoff. The
westeriy swale w,ll collect water from the new parkmg area and has a storage depth of
6-inches. The easteriy swale coliec#s water from the new shop area and aiso has a
storage depth of 6-inches. These two swates are piped together to handie the errtire
basin runoff.
A summary of the drainage caiculatrons are provided below. The detaited calculahons are
attached:
Impervious area m Basin A:
New Paving 60,074 S.F.
Roofs (New Shop and New Adddion to ewsbng Shop) 8,100 S. F.
Existng Paving 13.750 S. F.
Total Impervious Area 81,924 S F. = 1.88 AC
Only the runoff from the new paving is being collected and stored in grassed swales
Collecaon of the roof drainage for the new shop and addition to the exis'bng shop is not
required as there is no electrical or mechanical equipment on the roof and both roofs will
be of a rubberized material. The existing shop roof drainage is presently disposed of
through a drywell. The existing paving, which drams onto the new pavement is exempt
from being stored in a grass swale prior to disposal, as per discussions with County
Engineering staff.
✓ As shown on the attached rational formula input form, the drainage swales are required
to provide a ponding volume of 2,503.3 cubic feet (C.F.). The proposed swales will
provide the foflowing storage volumes:
West Swale 12 x 145 x.5 = 870 C F.
East Swale (27 x 19 x.5) +
(20 x 138 x.5) = 11636.5 C. F.
Total Storage Volume = 2,506.5 C. F
. Disposal of stormwater not stored in the swales wiil be through one Type "B" dryweil
instailed in the easterly swale. As shown on the attached bows#ring calculation sheet, the
two swales and drywell, provide the storage and disposal capacifies to handle the 10 year
design flow from storms runoff.
The overflow pipe, between the west and east swales, has been sized to carry 1.0 cubic
feet per second from Subbasin A-1. The west swale wiil collect and store 870 C. F. of
runoff prior to discharging, through the overflow p,pe, to the east swale. Subbasin A•1
consists of 33,825 S.F. of new paving. The minimum swale area required for Subbasin
A-1 is 1,409.5 C.F. (33,825 x.04167). The remaining 539.5 C.F. (1409.5 - 870) of storage
is provided by the east swate.
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A. [mpe cv tous Area 4pO ~ 074 fw• f. IfEw PAI.ay oAILy
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BOWSTRINC METHOD
DETENTION BASIN OESICN d' _ Z6 _ 92.
Time Increment (min) ~
Time of Concentration (min) S
Qutflow (c.f.s.)
Design year fZov (yc.) 10
Area (acres) 2.3 Developed "C" factor . 7-19
Area x "C" tamg,
~ a t ` 02 c r 03 r 04 r 15 ` 16 #7 '
Time Inc. Ttme Inc. Intensity Q dev. V 1n V out Stocabe
(min.) (sec.) (i.n./hr.) (c.f.a.) (cue ft.) (cue ft.) (cuo ft.)
- Ul * 60) (A*C*03) (see belov) (outFlov*a2) (05-96)
157 5ap =3. , a ~ .7-64.g ~ z-z.a -r la, i LI07
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15- 3.05' 3oS(o ~ 900 ~ Zv I izvo ~ r. ¢s" I 2 4 Z ~ 31 S/ ~ 1zoo ~ r4 s~
Z,s- ~ 4„sbo ~ I• Z! ~ z.09 3346 ~ l smo I8*S
~ 30 ~ 10ao I r. 09- 79 I 3406- ~ rKco I ~605'
I 3s I 2.loo • 9j ~ S 7 3457 ~ 00 13 S7
I 4,0 I 2-400 3 SZa l L~ ~ ~ i ~S _
~ 4.5-- 2-700 ~ . 7f ~ 2 S ~ 3S8 7~ 2-7 00 ~ 867
~ Sa I 3000 ~ ~ 1,17 ~ 36Z9 ~ 3aoo ~ (oZ 9
ro I.3 74 z 33oa I 442. ~
3l000 I • f°~ ~ /,tO.S- I 3997 ~ 3600 ~ 287
3901D ~ . &o 41 &Z ~ 340v 1 2 (,Z. !
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I 75- ~ 4svo • s& ~ • 97 I 414*4 f +sav
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BOWSTRINC METHOD ^t A
DETENTION BASIN DESICN G1~scy^/
Time Increment (min) 5~ Z_r~ `92
Time of Concentca[ion (min) .S
Outfloa (c.f.s.) /•O
Deaign yeac flow (yr. ) / O
Area (acres) 1.17 Developed "C" factor . ~o$
Area x "C" ~9Sb
f Y 1 #2 C 03 14 •S r 16 07 Time Inc. Time Inc. intensity Q dev. V.in V out Storabe
(min.) (scc.) (tn./hr.) (c.f.e.) (cue ft.) (cue ft.) (cu. Et.)
- M * 60) (A*C*03) (see below) (outflou*02)~ (1l5-116)
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, ~ ~p ~ r•Zt • 9(0 ~535 ! rs~ I 3$
30 / 000 ~ o¢ ~ • 83 ~ / S"79 ~ / 8 00 ~ - Z21
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~ ¢o I 7~ • 82 Z4*o I - 7 ;r4
~ 4s- ~ 2700 .7f /&53 Vlon ' l o g 7
3o vo ~ . &8 16 7.S 3000 ~ - 43 ZS !
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• CEN'i'RAL PRE-MIX CONCRE'TE CO.
CpFlPORATE OFFtCC--• EAST 51il BAQADWAY • P.Q 60X 3966
+ • SQOKAhfE. WA$HtNGTON 9WD-3M • (509) S34-M
March 26, 1992
. . . !
. ,
SFOB:ANF,COUN= ENCr C ISEPARTIIMNT - . :
. z
_ North 81i Jefferson. s ~
SpQkmne, WA 99260
• ~ .
At~n. ~ob Tainer
. . .
.i ~ ~GLL~tLZii~lrlL~► ~r~l1rW~ 'w_~ -L~4L~a71lL~ ~~y, (t~~,~
~Ll ~l ~~n ~ • • • ' S
NoA 2QiO~ Road ~ • , • ~ r r
. ~ • yd• ~
~ . . • ~
. . • ~ • ' , . .
.
~ Dear B/ V: - , •
. ~ . . ~ , . . .
. ~ ~ ~ ~ „ . :
. . ~ 1'
< j
~ I amri.~avriting tio ezplaia #se reasons we ~ve r'~c~a~ested yau to e~p~x~+e our b~ ~
• w •
~ y•kno~w, the expavsion of onr fac.ies
&or the haltP I~amt costttol room b~ As ..~m~at
. • • • • ~ ~ M
. . • oa R,oa~i aa~sts..of. ~.shap ~ a.new shap, • • new Zspb*t pIs~4 and'a noW
.
. affice lvm-l 2- wyc~. are.: all shoia ' on' •the Cottaqtaad~ - i4Lasw Pian ' on
, ~ « ~
I?eoember 19, I99L Tb a;spkalt g~nt Ys m tt~e prooess a~f be~ ~ng ~retted to meet a deidffiie
af Apnl 23. Th3s p1a~t is bft Gre&ed to rcplawtwo pbats, oke of wluch #ms aheaAy
beea dismahde& Asphah gnodnctimaM nmda &amalicany at the end of Aphl and We
• •4 ~ .
~
wM n,eed tte:Gqrdci~y of the n+ew pla.t~t to a~,~t~ely sa~ply our , '"R~e 1zave aiso ~
~ ooftinte d Witfr t h e _ mannhcturer o f t bn p lani t oILa v' e a u er e c~ i an a r e a v f r o o m t he N f die s t
.
- w h o is r o~ 3 ~ g on~ i tdv v i~ i u s. ~ T e ne e d x o ~ b e g i i~.W o r k on' t b e c o o r str o l• r o o m b a' s e
• tio ~ a gV •in the esectian e dnl, w h i~ h. w oul d cxeaxe a d e l ay f or the'out-o f-town '
. 'erectian creW:and onr producdm sc~ted~1,~ mie,r+~re, we &eI ani iagntediat~ need far a
.B~`in,'_g peamit for the oouirol room base. . • . ` - - ~ - - • .
.
• . . . . -
. .
• Since'the co6tml.roobibase is a smalt and C;nI,e sttucture, bttrebdvel~t wrotiid ~
- . • ' Bt~Y aPP~ ftif.yanwould please aqedixe the bQOd"wgpei~mfi for' tW sdra,cxke. ~ .
~ . . .
We aMec~autv_poui •ao~ideration and cooperattan iu tbis m,axCer._ ~ If y+au have ady
que.sdons6.-pIem do not he.atate to ca - . . . _ _ ` . .
.
~ . „ • •
SrnQerely, • ' . • . ~ .
' • CENTRAI, pRE-1VIX CONCRETE CO. •
N
•
• • • ~ , ' ~
• : ~ ~ • •
~ • ~
MarkMnrphy .
OP+~r~~o~sT~g~aeer _ ~ .
_ : • .
1VIDM/k~c • . . . _ .
y • •
•
~ • • ~ • ~
~ • • • •
• BPOKANE ~ O_ OOMR p'ALENE 0 'MOSOOW-PUllrMAN 0 TRI-CR'IES O YAKtMA ci S6AT11E
. •
• - ' . . ~ _ _
• ~ ~ • j •
• • ~
• • ~
~ ~ ~ ~ C~ • r ~ 1' • • • • • { ' • . . . . . .
~ ~ ' »
a •
CENTRAL PRE-MDC/INLAND ASPHALT
New Shop Drainage Report
Background:
A new shop is being constructed south of the existing shop at the Centrai Pre-Mix Piant
ske on Suilivan Road. Other improvements to the site include paved parking for the
existing and new shop facilifies. Drainage facilities are planned to handle the first 1/2-inch
of runoff, from ttie new paved areas, m grassed percolation swales
Drainage Calculations:
Drainage Basin A, as shown on the attached pian, is the total dramage area for these new
improvments. As shown, two grassed percolation swales will be developed along the
south perimeter of the site to collect, store and dispose of stormwater runoff. The
westerly swale will collect water from the new parking area and has a storage depth of
6-inches. The easterty swale collects water from the new shop area and aiso has a
storage depth of 6-inches. These two swales are piped together to handle the entire
basm runoff.
A summary of the drainage calculations are provided below. The detailed calculations are
attached:
Impervious area in Basin A•
New Paving 579025 S. F.
Roofs (New Shop and New Addifion to existing Shop) 8,100 S.F.
Existing Paving 13.750 S.F.
Total Impervious Area 781875 S F. -1.81 AC
Only the runoff from the new paving is being collected and stored in grassed swales.
Collection of the roof dramage for the new shop and adddion to the ewsting shop is not
required as there is no electrical or mechanical equipment on the roof and both roofs will
be of a rubberized material. The exisfing shop roof drainage is presentty disposed of
through a drywell. The existing paving, which drains onto the new pavement is exempt
from being stored in a grass swale prior to disposal, as per discussions with County
Engineering staff.
T
As shown on the attached rational formula input form, the drainage swales are required
to provide a ponding volume of 2,376.2 cubic feet (C.F.). The proposed swales will
provide the following storage volumes.
West Swale 12 x 145 x.5 = 870 C F
East Swale (27 x 19 x 5)
(20 x 125 x 5) = 1.506 5 C F
Total Storage Volume = 2,376.5 C. F.
Disposal of stomnwater not stored m the swales will be through two Type "B" drywelis
instalied in the easteriy swale As shown on the attached bowstring calculation sheet, the
two swales and dryweil, provide the storage and disposal capacdies to handle the 10 year
design flow from storms runoff.
The overflow pipe, between the west and east swales, has been sized to carry the peak
in flow to the west swale as 2 53 cubic feet per second from Subbasin A-1. The west
swale wi11 collect and store 870 C. F. of runoff pnor to discharging, through the overflow
pipe, to the swale. Subbasin A-1 consists of 33,825 S. F. of new paving. The minimum
east swale area compteted for Subbasin A-1 is 1,409.5 C F. (33,825 x 04167). The
remaining 539.5 C F of storage is provided by the east swale.
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DETENTION BASIN OESIGN
Time Increment (min) -15~
Time of Concentra[ion (min) S"
Outflow (c.f.s.) 2..0
Oesign yeac Elow (yr.) / O
Acea (acres) 2•3 o Developed "C" fac[or .74
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#1 ` #z c 13 ` 04 r as ~ 06 07 '
Time Inc. Time Inc. Intensity Q dev. Y in Y out Scorabe
(min.) (sec.) (in./hc.) (c.f.e.) (cue ft.) (cue ft.) (cu. ft.)
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CENTRAL PRE•MIX/INLAND ASPHALT
OFFICE/ASPHALT PLANT DRAINAGE REPORT
Background:
A new office building and asphalt plant is being constructed north of the ewstmg Centrai
Pre-Mix facildies at the Sultivan Road sde. Other improvements to the site include paved
roadways, paved stagmg areas and gravel surfaced staging and material stockpiling
areas. Orainage facilities are sized to store the first 1/2-mch of runoff, from the new
paved areas, in grassed percolation swales.
Drainage Calculations:
There are two drainage basins for the office/asphalt plant site, these are shown on the
attached drainage basin map. Basin A collects, stores and disposes of runoff ftom the
southwest portion of the site. Basm B collects runoff from the remainder of the site and
is the largest of the two basins.
The following table shows the impervious area, required s#orage volume, and storage
volume provided for each basin The details show the sizes of each swale.
s ~ . .Re4jjjrV0 Starage * Storage Volune
8asin Impervious Area ~ Area ° Provided
A 219390 S. F. 891.3 C F 929 C. F.
B 122,750 S. F. 5,115.0 C. F. 6,961 C. F.
The attached bowstnng calculations show the swales are capable of stormg the peak
inflow while allowing a.3 CFS outfiow (Type "A" Drywell) and a 5.0 CFS outflow (5-Type
"B" Drywells) for Basin A and B, respectively. The chart below shows the peak flow,
maximum storage volume required for inflow storage, and swale capacities
,
n ~ v
~ lrrftow stdrage Vo1ume * Storage votutne
Basin Peak Flow RaqWred P.rovided
A 1.55 592 C.F. 929 C.F.
B 14.24 6,996 C. F. 69961 C. F.
* Storage Volume provided does not account for side slope storage within each swale.
Side slope storage adds 84 C.F. and 295.5 C.F. to swales A and B respectively.
The grassed swale for Basm B is' spln by an access road . The two swale halves have
the same bottom elevation, of 1981:00. Two 18-inch, CfVIP culverts provide flow
equalizaUon be_tween the swales. Inflow calculations for each subbasin; using the
bowstring method, was used to identify the inflow into each swale hatf and to facilitate the
sizing of the flow equalization cutverts.
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BOWSTRINC HETHOD ~A~s~ ~ ~ - /~•s~N S~ P~
DETENTION BASIN OESICN
Time Increment (min) ~
Time of Concentration (min) S
Outfloa (c.f.s.) gZ
Dcsign year flov (yr. ) / O
Area (acces) Developed "C" f8ctor
Area x "C" bz
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(min.) (sec.) (in./hr.) (c.f.e.) (cu. ft.) (cu. ft.) (cu. ft.)
(Ul * 60) (A*C*13) (eee belov) (outflow*U2) (O5-06)
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OETENTION BASIN DESICN 3~Z S¢ uv ~ o~
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Time of Concentcation (min) .s
Outflov (c.f.s.) S
De9ign yeac flov (yc.) 10
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Area x "C" (o, 3 S114, 6
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(min.) (sec.) (in./hr.) (c.f.e.) (cue ft.) (cue ft.) (cu. ft.)
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iN ~N~M ~t/ Nvy ~
p x ~ ~'i+'111 F~
fF
~'`,No
!o
~
A
. G.1~ 3•,
/(1 ¢s
' SwLt,av at-4 S• r,e. 9~,a oao+IS~d>.j
~~1u,A~(iit~rnc+►J P~~ f.~Gc s
MPA-S rA! & _
BONSTRINC METH00
DETENTION BASIN DESICN 3' 31 -?2
3 a Z~~ c~t3 ! 4/
Time Zncrement (min) 5~
Ttme of Concentration (min) S
Ou[fiov (c.f.s.)
Design year flov (yc. ) ! O
Area (acces) 9,:5,7 Developed "C" factor . 5~
Area x "C" !i4 t'o3
# 1 #2 C r 13 r #4 r #S r 16 Y7 Time Inc. Time Inc. Intensity Q dev. V in V out Storabe
(min.) (scc.) (in./hc.) (c.f.e.) (cu. ft.) (cu. ft.) (cu. f[.)
U1 * 60) (A*C*03) (eee belov) (outflow*tl2) ( US-tl6)
3.1t3 ~ 17 4ca
~ /o zd ~ l2. .4,r ~ r18 80
1-77 _ 9.99 iorcio ~ ~
l. gs ~ 8.19 ~ /o, C, 63
Z.~ sbo 8 3 fWZ ~ I
30 ~ /90.0 ~ 1• 09- ~ .5:$ 7~ //l 1 bs,
3s I~oo . 41 s. I//. 3~ 8 I t
1 40 I 2-40o ~ • 8 2 I 4. 63 ! //r S$ 4
1 4f I z700 I . 7¢ 4.18 I r/* v2 I !
S25- ~ 33 oa I ,~9- I 3.~ ~ I f z, aepi
oo ~3 &M 1 3.44 I / z, -73S I I
~ (aS ~ 34va ~ !vo ~ 3, 3q
_ 70 ~ 4ZOD ~ •59 ~ 3, t7 /f* ob I
~ 7S ~ 4Sva ~ • Sfo ~ 3rt e,, ~ /¢fS4 Z
'go I+5W .53 I 2,91 6s7 ~ I
8~ I Srvo I . 5Z. ~ z.94- I/,s 294 I I
90 ~ s•~oo !..s~ I 2-~ Z I ~S s"~ ~ I I
~ Js I S'700 ~ .41 ~ L• 77 0?2. ~
~'iv0 roo ov , 4. g~ Z. 7/ ~~~►r W(a I I
.
Vin • 1.34 * Q dev * t for t< Tc
Vinm Qdev~ tt.34 ~Qdev•Tcfort>Tc
306/6
3viS4~ '#3
~ u.Y•~.~r
fo,lve. uwi~ * ~ nkoft,
~y
•
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a+ ~M Le
a~~ ~~r
~ F~100
(.~1u0 % L°' , ~4 Z szo aF 4- 43 0 ,
1
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a 30
~ ~5 ~ ,
, ~#~''E'c' , • , ~z~ S ._.r ,
.
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G t= . rS , W UL L,F,u ~~N
,
~ ,
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afF ~~►~t° ~ t F-~'
1,39 x .41 Qr ' 1.0
& 0
' • SsiGC.v.ew S~
r~- ~a~, s• o~
BONSTRINC MBTHOD 3 3~_,~ Z
DETENTION BASIN DESICN
3oZS`¢c~~ a ~
Time Inccement (mia) ~
Time of Concentration (min) S
Outfloa (c.f.s.)
Oe9ign year flov (yr. ) / O
Area (acres) 1, 39 Developed "C" factor • ~ ~
Acea x "C" • Sln~ ~
u1 r az c 13 #4 ` os ab 07
Timc Inc. Time Inc. Intensity Q dev. V in V out Stocabe
(min.) (sec.) (in./hr.) (c.f.e.) (cu. ft.) (cu. ft.) (cu. ft.)
U1 * 60) (A*C*03) (see belov) (outflov*U2) (fl5-Il6)
157 2to-Q ::5. 1 b , Lb-W
j v ~ ooo I 2.. 7-4 I t. Za
i s I a o~ I 1. 77 40 ~.u I Izvo I 1, fs °g l . ~ !
Z. ;ep o ~ ~ • Z l ~ • (°9
30 ! /000 `r.loa ~ • 91
I d-~ j 2,40o I • b2 ~ ,~-7 1 /jr
4s I z700 I . 74- ~ Z V-77 I I
.sa I 3a oo ~ .~vS . 39 I ~r L~ o ~
330o
~ 3 &M I .3S I ~ I ~
os I 39va &o ~ ..14 I ~f 3G
~ ;70 ~ 420D . 59 ~i9ZO
~ 7.5- ~ 4sva I • s~ ~ . 3z
I ~J4 7/ I I ~
80 53 ~ ,30
SS I Sr~o Sz. . 3 o I ~~5~ t I I ~
I. so I, z$ I~ s~i ~ I
( 9o I -5,400
~s s~oo . 4•Y ~ LS I/~zs'- 1 I
eoooo ~ .4~ I • L7 I ~t ~4s I I
Vin • 1.34 + Q dev * t for t< Tc ~
Vina Qdev~ t+.34*Qdev~Tc fort> Tc
306I6
1 Q
P DATE4 " 12'`
aQ,1E~ Na 3
BY ~ t,,lp or C
SHE N
3,UWECt' V
I~S~Ny y = /'0' S
*Vcf,.~t u M I a G
!s A-f L~'"'Y
fIF, v . 4- ~ ! E
~ L°~,`'~~'
f, t~
~ N
L
Ke - A-f R
q
C,#4AA~r _ owo
U ~ 1r Y G~O R
2
~~;'a~.~► ~ G~'~ Z ~ i ~
-0100_ ' °
'
~~9¢
~O
CHART 9
2000 _
N
M1M 1
h0
a
_ ~~vv.~vvK~~'v Slope So----*
W
t000 ~ Z 51J8MER4E0 OuiIET cuLveat cLnwING FuLL - g
~ Mw • N• no-~So
~
800 , IZO Fot ou11N cro.n eol wDmatpta. taa~pWs N~I1 py - 6
aeu►oe$ a.ntseee w tM aol+pn aoc.avr•
600 -108 8
500 - 96 4A ~ 10
aoo - ea ~ .
/
300
166 T2 200 E~'`E~/yo O`W Z
- 60 ~
y
N ~
v - SA _
O /
N 0•09 ~ lo110 _ 9,0 ~,j, = 3
_ _ , q 0~
F'P
l00 - 4 2 ~Op b~~ ~ Q
" W -4
W
Q 80~' p .~p0 hoo s
_ _
j 6
vui 60 W- 3 3 A00 y0~ 6
o Sp ~
~ 3 0 ~p0 s 8
40 Q f
o -27
o a 10
1`r
/-20
1-20 20
6 y12
5
4
HEAD FOR
CONCRETE PIPE GULVERTS
FLOWING FULL
eURc•U oi PUsLiC ac•os j.N 1963 n= 0.012
5-32
ppQJEG'1 ~o DA?E
o gy ! dF. .
SHEET NQ.. C
tou
N
sus,E'cT Z.Au
~ L°w
5►-~~~ elf d t•~M~°~70A/ W
!i M ~ ~ ~r !oQ s
T
qs Alp
zq2
D L- - ~ ~ N
~~"''t' K~ u s G
I Oo 154 Pslg- R
~L -4111ooY / P
0 LAO,o~•~rys 0 t.l5~t~t, A
j T
1
O
sst DAI r N
_ !s¢ C
:5_0 _
svo rs i
.4./ ~
V
~ j✓~t,~ ~ S~s , s~
~
73~
t,/
N z 3 s ~ . o3+
ml'viMam
22, qA -0
IA
t,t s ~ 1 ~
' 90
3 STR UCTURAL DESIGN WALL TNICKNESS
4. Allowable Wall Stre=
J . , The ultimate compr+ess
a
~ backfill compacted co 8
pomt of 33,000 psi, are
~ o~ pipe watl is expressed b
specified minimum yiel,
°D' crushrng or yielding T
~o°and nng buckling And
1 fe = fv - 33,D
N
° 2 fe = 40,000
~
0 0 493 x /ly
o - ~ 3 fs = ~-2
a N,~ L D
~
c~p p~ ~ r
p ° c
Q " N
oo 0 A factor of safety of 2
C4 stre55, f~
I
( o►~o v N-N,~ S. WeII ThiCkRess
Required wall area, l+
~ N ,a wall, C. and the allo%
x
i~ o
i- ~
~
o.~ From 'Table 3-2 scle.
same corrugaUon u5+
g 6. Check Handling -
f - Minimum pipe stifth
ao- -o~- without unciue care i
formutaied Thc rest
bmation nt corrugai
~ F!
1 M~-
where I
1
N `Q - Ca -
~
x Ss' ~ ~ o~ . Recommencled ma,%
~x ev O j ~
x
fb = Ulhmofe Rmg Compression Slress, ksr v,z ~O
1 3 6
Ull
itnat
ated e;ers nd co uttat on~s The affo ~ble stress~s takengas 0 e half fhe ultim rtousate diam
Higher values can h
Treneh cAndition,.
enccs are another
pipc in some natis
abovc for stee) Tf
the stiffrtess of stel-
a.w S. : ♦
uF
~
lO18 3. STRUCTURAL DESIGN , HEICHT-Ot
~
Teble HC-i Height-ot-Cover L1mits tor Corrugated Steei Pipe Table HCr3
H 20 LIVE LOAD 2'K" X%" Corrugations
Maximum Caver m Feet p,ameter
Diameter Mtn .
rnrinc~hes CONef Sper~fed Thickness in Inches nrin~es I
0052 064 079 109 138 168
12 - I99 248 310 12
1S 159 199 248 15
18 132 166 207 18
21 113 142 118 249 21
24 99 124 155 218 24
21 ~ 111 138 193 27
30 ~ 99 114 174 30
35 E 83 103 145 186 36
~ 42 E 71 88 121 160 195 42
48 5 62 n 109 140 111 48
54 ~ 66 93 120 147 54
' 60 ~ 79 102 125
68 87 IOl ~
' ~ ~ ~ 65
~ 72 73 89 72
~ 78 14 ~
84 61 ~
90 ~ 50 ~
96 41 96
•From top of pipe to top of subgrade
Table HC-2 Hetpht-ot-Cover Umiffi /or Corrugated Steel Pipe
Tabie HC-4
H 20 LIVE LOAD 3" X V Cor►ugations
0
~
Demeter ~ Maximum Covet in Feet i
or Span ~~r Spetified Thickness m Inches DFameter ;
in Inches or Span
0052 064 079 109 136 169 in Inches
35 - 16 95 121 167 I 214 263 -
42 65 81 102 143 185 225 35
48 57 71 91 125 ' 161 197 41
54 63 80 111 ~ 143 175 48
60 10 57 72 100 129 156 SA
66 19 52 66 91 I 117 143 60
72 N 47 60 83 lOl 131 65
78 44 55 76 99 321 , 72
84 40 53 71 92 112 78 ~
90 38 48 66 85 105 gq
96 35 45 62 ' 80 48 gp
102 g , 33 42 58 I 15 91 96 i
' 108 ~ 39 54 69 84 102
114 120 35 49 63 77
S 7? 1o8 I
~ 114
120
•Fmm top of pipe to top oi subgrade.
~ ~
qp 1 PRODUCf DETAlLS SECTlC
~
PIPE ANp PiPE-ARCHES LINER PIATE
~ V
_L
T
wt~ • . a ,
s
TYPE I
~6 1 ~ f ~ -7°..~ • r
r
+ TYpE 2 9
3
~
_ a • 4
r.- o
L46
r 1 fIANGE ~ y
a
~
fig I 2 Corrugation types commonly used for galvanized sheet and structural steel =
conduits and tunnet linet plate
v
c
DE3CRIPTION OF CORRUGATIONS e
There are many kinds of carrugauons, same of which are shn•yn m Fig 1-2 ~
Corcugations commonly usded for pipes or conduits are termed ' circular ares ~
connected by tangents," and are described by piteh, depth and inside forming 0.
radius Pitch is measured at right angles to the eorrugations from crest to A
crest «
, For riveteei vc reststance spot•welded pipc with crrcumferenital (annular) ~
~ seams. the corruptions are ot?d3 in pttrh by 2/2 in depth and 3-in by 1-in
For lock seam pipe, the seanis and corrugations run iteiically (or spirally) m
~ around ehe pipe Fer smaii diameters of subdrainage pipe (6. 8. 14 in . ece ) y
~ the pitch vs depth dimenSiAn ts !~/2 x~/ tn Larger sixcs (with diametcrs to
I20 m) use 2 x1/2 in , 24; x i in and 3 x 1in eorrugauons ~
, Strucwral plate pipe is a bolted structure The b r? in corrugation is che ~
` standard ot the American Assocraeian of State Highway Oflicials.11 o
, U
, SECTIONAL PROPERTIES o
Sectionat pruperties of the arc•and-tangent type of ehrrugatian are cierrved a
mathematically I These include area, A, moment af inerua, 1, section modu• . ~
lus, S, and radius of gyration, r Research by Amencan Iron and Steel In• _ Q
stituceQ has shown that tailure loads m bending and deflection within the ~
elasnc range can be cfosely pcedicted by using computed secuonal proRertres a
of the carrugatecl sheet See Tables I-S through 1•9 3 1 ~
(7'ext cviritttued, page 46)
N
Tabte 1-2 Conversion of Nominal Gage to Thickness o
Gage No ~ 22 10 1$ 16 14 ~ 12 ~
~ nf
Uncoated Thickness in 00299 00359 4i78 J 0598 4141 1M ~
Galvanized Thitkness'-In 0 034 0040 052 064 0I9 109
Galvanized Thickness- mm ~0162 ( 102 132 i 163 201 217 ~
Gage Nc ~ IA 8 7_ S i_ 3 1-
Uncoated 7hiekness-In 1345 1644 1838 2145 2451 2758
Galvanized Thickness•-In 138 168 188 118 249 280
Galvanized Thickness-mm y 351 ~ 421 1 478 5 54 ~ 632 711
•Also reterred !o as "specibed tbckness" tor oorrugaied steel pipe praducts.
For tunnel hner plates, guardrai) and olher products see chapters on lhose preducts.
~
CENTAAL PAE-MIX CONCAETE CO.
CORPORATE OFFlCE • EAST 5111 BAOAOWAY - PO BOX 3366
SPOKANE, WASHINGTON 99220-3366 - (509) 534-6221
March 26,1992
SPOK:ANE COL'fNTY ENGINEERING DEPARTMENT
North 811 Jefferson
Spokane, WA 99260
Atba: Bob Turner
Subj: Central Pre-Rriix/Iniand Asphalt Site Expansion
Nortb 2010 Sullivan Road
Dear Bob:
I am writing to explain tbe reasons we have requested you to expedite our building permit
for the asphalt plant oontral room base. As you may kaow, the expansion of our facilities
on Sullivan Road consists of a shop addition, a new shop, a new asphalt plant, and a new
office building, which are all shown on the Conceptual Master Plan submitted on
December 19,1991. The asphalt plant is in the prooess of being erected to meet a deadline
of April 23. This plant is being erected to replace two plants, one of wbich has already
been dismantled. Asphalt production will increase dram,atically at the end of April, and we
will need the capacity of the new plant to adequately supply our customers. We have also
contracted with the manufacturer of the plant to have an erection crew from the Midwest
who is currently working on•si.te with us. We need to begin work on the control room base
to prevent a gap in the erection schedule, which would create a delay for the out-of-town
erection crew and our production schedule. Therefore, we feel an imnaediate need for a
building permit for the controi room base.
Sinve the controi room base is a small and simple structure, but relatively critical, we would
greatly appreciate it if you would please expedite the building permit for this structure.
We appreciate your consideration and cooperation in this matter. If you have any
questions, please do not hesitate to call.
Sincerely,
CENfTRAL PRE-NIIX CONCRETE CO.
Mark MurPbY
Operations Engineer
MDM/kc
SPOKANE 0 COEUR D'ALENE 0 MOSCOW-PULLMAN 0 TRI-ClTIES 0 YAKIMA C] SEATTLE
BEFORE THE BOARD OF COUNTY COMivIISSIONERS OF SPOKANE COUNTY, WASHINGTON
RESOLUTION NO. 92 0412
IN TAE MATTER OF AUTHORIZING AGREEMENT )
FOR TRAFFIC SIGNAL IMPROVEMENT - )
SULLIVAN ROAD AT SULLIVAN PARK ) R E S O L U T I O N
COU NTY ROAD PROJECT NO. 2477 )
WHEREAS, Central Pre-Mix Concrete Coinpany. as part of the proposed develapment of a Shopping
Center is obligated to provide for the improvement of Traffic SigAal Systems for Sullivaa Rogd at Sullivan Pack;
and
WHEREAS, tbe Developecs have requested Spokane Couaty to perPorm the improvements at the
Developers expense and have executed an agreemeni for that purpose; and
WHEREAS, the County EngiAeer recommends approval of the agreements by Spokane Counry.
THEREFORE, BE IT RESOLVED by the Board of County Commissioaers of Spokane County,
Washington, that the agreements with Central Pre-Mix Concrete Company, for improvement of the Trafflic Signal
Systems for Sullivan Road at Sullivan Park is hereby approved and tbe Chaicman of the Board authorized to
execute same by and on behalf of Spokane County.
BE IT FURTHER RESOLVED that the 1992 County Construcdon Program is hereby unanimously
amended to include these projects and the County Engiaeer authorized to cominence preliminary eogineering on
the projects.
PASSED AND ADOPTED by the Board of County Commissioners of Spokaae County. Wasbington, this
24ch day of March, 1992.
BOARD OF COUNTY COMMISSY4NERS
OF SPOKANE COUNTY. WASHINC3TON
.
a R. McBrid airman
.
Patricia A. 'fL
l
Steven ~IassATTEST: W LIAM E. DONAHUE
RK OF THE RD
BY
DEZUTY
Ilvlrealjenltrwis tcotn!
w~ ~ 1
• AGREEMENT
This agreement, dated this 16th day of March, 1992 , by and between Central PreMix
Concrete Co , a Wasbington Corporatioa, for itself, its heirs executors, administrators, successors of
assigns, hereinafter called the "DEVELOPER,p and SPOKANE COUNTY, a municipal corporation In the State
of Washington, for tbe purpose of improving the tntersectioo of Sullivan Road
and SDOICBIIe Countv Park at suilivan by installation of traf~ic signal system, which unprovemeat
is for the purpose of enhancing access to the Developer's property under the following mutually agreed
COndlti0ns, t0 wit:
Spokane County ugrees to perform the Pollowing:
1. To prepare plans, specifications and estimate of cost for the project aad Call for Bids from
private contractors to accomplish said work.
2. To enter into a contract with the contractor submittjng their lowest and best bid, subject to the
approval of the Developer, and the deposit by the Developer of the contract amount, including
signal equipment, plus 209'o for construction eagtneering, inspection and contingencles with
Spokane County.
3. To pay the contractor amounts due as the work is accomplished.
4 To deduet from the Developer's deposit the total costs and expenses of tbe project upon the
completion thereof, including engineering, adminlstratlon and associated costs.
S To refund any balance of the Developer's deposit in excess of the total cost and expense of the
improvement, or
6. To bill the Developer for the costs and expenses of the project which exceed the deposit amouat,
if any.
7 Upon complehon of the work to accept the same as part of the County road system and assume
maintenance responsibility therefor.
The Developer ngrees as Pollows:
1 To deposit the amount of Eight Tbousand and No/100 Doltars ($8,000.00) with Spokane County
at the time of execution of this Agreement to inidate prelinninary engineering for the project.
This deposit will be applied to the total cost of the project.
2. After bid opening by the County, but prior to award of the contract, to prompdy deposit the
contract anlount, including signal equipment, plus twenty percent (2090) for construction
eng,neering, inspection, contingencies, and associated costs with Spokane County.
3. To pay promptly to the County, as bdled, for any and all costs of the project which exceed the
deposit amounts.
THE PARTIES are bere agreed that this is the whoie and complete statement of the3r agreement.
APPROVED• DEVELQPER: Central PreMix Concrete Comvany
* B
SPOKANE COUNTY ENGINEER
TITLE: V ~I~d •
BUS.ADDRESSf
APPROVED AS TO FORM: 6601 E Broadway
Spokane, WA 99220
~
SPOKANE COUNTY
DE TY PROSECUTING A
~
BY:
AIRMAN 0 BOARD OF
PAHE
OUNTY COMMISSIONERS OF
SPOR:ANE COUNTY, WASHINGTON
ntunt.aeAe$mumtaev tmr.c8
NOTICE OF TRANSMITTAL
F ,~~~!v2~ - x~ i " v,..~S'~•' y ~y~ ry., K oq- + ~ ~yJ .~'6~~
, a';~' Ai;' ♦ P `~yS~ ~S ~~~4`/f+',~•r'~T~~',~`^"'yri+Y~?"`t~'y"h~f.:.~",•"'2'S . ~%r.~'',~`~{~5;$• ~ 3~. r i''
~+r r s ♦ h.~"' rf~ ~4 .v R S. S i ? 4 F } ~ n>
f~..l v tii ~.W}.~ ~,J+~ a> 1~. 7~
y. < ~ { c . . . F ~
'7~~~,~~7~{~ "h x vn,~ ~'t. yn~~!, ~.s,{'~1G~ M1 +•{ik zy,~p,, J.j;;{"~, 'yf v r 'J
v .ti • FRC ..S ' ~n b .ti'{, `~-i. , SD ~vN~~sh~ tiwts
~'N k ~
Do' O V ULL1 V A-kf • _ir FC q}~}~ Y} ~ ~~,L41, j J. ~ a, ~3 O O $
rfWt~~ ti r I rsy
~ ~~f yi~'y'$ ~ r~' ~'~'+r r''v'-:v L C~~~
~
boq
~ 1 ! ' " Y 'SY~. . ,~Y{v ♦ `Y M'.{,¢' ~ Y " + T r ~ ,yp~ ~ .v v
^•r ~~r ~ v ".v~' L$}~. q ~~,,t~}:~ 1~}~~ ~y ~ ♦ ~~f~ ,e ! ~r ? f
'~N
~y «v~ '4 ''~a~J v ~ 4'Ci y'~rr 4 t.~ ~ ~ w~.~ 3 ~ ~ . •i `~'•7y •
I h~ ~V~ K~.'. ~L M ~4 l1 V 4 Iy ~ CYY ~ { Y
* h ~~r J~ • ~ r~ t3+tk~: n ?~rr} {r ..v v , n:'tifi.` ~C ~*`r ' . .i~'.,,
vr 1' l.
} + ~ ~ k 4 ; ~ n ~ r
JR
4 ~1 ^
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4 I~ r 1 y. r {
♦ ? ~~ct~C~£~~,` ` ` t`.. „~1` r f` 6~ ~ `Y`-. _c~'
M
L. i~ 4 4P~~t
I
S
TYPE OF CONFERENCE
Pre-Appiication Pre-Construcnon Other: DATE:
TIME:
DOCUMENTS CIRCULATED
DA7ED REVISED
APPLICATION ~
SITE PLAN_/' ~ 3-- 1?- 9 a
ORAtNAGE PLAN
LANDSCAPE PLAN
Other:
Other. .
ADDITIONAL tNFORMATtON
CIRCUTATED TO CIRCULATED BY: DATE: -
_ SCAPCA-M. Caine Utilities ~
3-~~) '-0?gineedng-_- Fre District,# It
Health District Liberty Lake Sewer Queshons? Contact Jeff Forry or:
Planning _ Other
Spokane County
OtVIS10N OF BUIIDINGS
West 1303 Broadway Spokane, WA 99260
(509) 456-3675 (ofhce) or '(509) 456-4703 (fax)
AGREEMENT
This agreement, dated this 16th day of March~ 1992 , by and betweea Central PreMix
Concrete Co , a Washingtoa Corporation, for itself, its heirs executors, administrators, successors of
assigns, hereinafter called the "DEVELOPER,° and SPOKANE COUNTY, a municipal oorporation in the Staia
of Washington, for the purpose of unproving the iatersection of Sullivan Itoad
and Svokane Countv Park at suilivan by instaUation of u-dffic signal system, whtch unprovement
is for the purpose of enhancing access to the Developer's property under the following mutually agreed
conditions, to wit•
Spokane County agcees to perform the follovving:
1. To prepare plaas, specifications and estimate of cost for the project aad Call for Bids from
private contractors to accomplish said work.
2. To enter into a contract with the contractor submitting their lowest and best bid, subjact to the
approval of the Developer, aud the deposit by the Developer of the contract aznount, including
signal qquipment, plus 20% for construction engineering, inspection and contingencies with
Spokane County.
3 To pay the conuactor amouats due as the work is accomplished.
4. To deduct from the Developer's deposit the total costs and expenses of the project upon the
completion thereof, including engineering, administration and associated costs.
5. To refund any balance of the Developer's deposit ia exce.ss of the total cost and expense of the
improvement, or
6. To bill the Developer for the costs and exp~enses of the project wbicb exceed the deposit amount,
if any.
7 Upon completion of the work to accept the saaie as part of the County road system and assume
maintenance responsibiliry therefor.
The Devetnper agree.s sis follows:
1. To deposit the amount of Eight Thousaad and No/100 Dollars ($8,000.00) with Spokane County
at the time of execution of this Agreement to initiate prelitninary engineeriag for the project.
This deposit will be applied to the total cost of the project.
2. After bid openiag by the County, but prior to award of the contract, to prompdy deposit the
contract amount, including signal equipment, plus twenty percent (2096) for oonstruction
engineering, inspection, contingencies, and associated costs with Spokana County.
3 To pay promptIy to the County, as billed, fnr any and all costs of the project which exceed the
deposit amounts.
THE PARTIES are here agreed that this is the whole and complete statement of their agreemenL
APPROVED: DEVELQPERt Central PreMix Concrete Comuany
~ BY:
SPOKANE COUNTY ENGINEER
TITLEr • V Dlc6 . J
BUS.ADDRESS:
APPROVED AS TO FORM: 6601 E Broadway
Spokane, WA 99220
~
~ SPOKANE COUNTY
DEPUTY PROSECUTING ATTORNEY
BY:
CHAIRINIAN OF THE BOARD OF
COUNTY COARMISSIONERS OF
SPOKANE COUNTY, WASHINGTON
1%1=d-devlagreecnaaldev trnfaig
~
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S O K A N E ~ , C O lJ N T"Y
APFiC,E OF TliE COUN7Y ENCINEEI2 • A DIVl31ON UF TIiF PUSLIC WOw DEI'ARTMENi
Ranald C Hormann, PE, Caunty Engineer DX-nnis M Scott, P E, Directar
TO: Mike Murphy
FROM: 8ob Turner
Spokane County Engineers Department
DAT$: March 10, 1992
SIIBJECT : Agreement f or traf f ic s ignal
Dear Mike,
Enclosed is an agreement necessary to allow Spokane County to start on
the design of the traffic signal for your project. This is the saiae agreement
that the County sent to ITRON for their signal. Dean Logston mentioned that
you wanted the same agreement that they received.
Sincerly,
~
Robert Turner
N 811)eEferson Spokane, WA 99260-0180 (SOQ) 45b-3600 FAX 15091 450-471 5
~ AGREEMENT
~
This agreement, dated this day of , by and beiween
, a Washington Corporation, for itself, its heirs executors, admimstrators, successors of
assigns, hereinafter called the "DEVELOPER," and SPOKANE COUNTY, a municipal corporation in the State
of Washington, for the purpose of improving the wtersection of
and by installation of traffic signal system, which unprovement
is for the purpose of enhancing access to the Developer's property under the following mutually agreed
conditions, to wit•
Spokane County agrces to perform the followtng:
1 To prepare plans, specifications and estimate of cost for the project and Call for Bids from
pr,vate contractors to accomplish said work.
2. To enter into a contcact with the contractor submitting theu lowest and best bid, subject to the
approval of the Developer, and the deposit by the Developer of the contract amount, inctuding
signal equipment, plus 209o for construction engineering, inspection and contingencies wlth
Spokarie County.
3. To pay the contractor amounts due as the work is accomplished.
4 To deduct from the Developer's deposit the total costs and expenses af the project upon the
completion thereuf, including engineering, administration and associated costs.
5 To refund any balance of the Developer's deposit in excess of the total cost and expense of the
improvement, or
6. To bill the Developer for the costs and expeases of the project which exceed the deposit amount,
if any
7. Upon completion of the wock to accept the same as part of the County road system and assume
ma1ntenance responsibiliry therefor.
The Developer agrees a.s follows:
1 To deposit the amount of Eight Thousand and Nol100 Dollars ($8,000.00) with Spokane County
at the time of execution of this Agreement to initiaie preliminary engineering for the project.
This deposit will be applied to the total cost of the project
2. After bid open►ng by the County, but prior to award of the contract, to promptly deposit the
contract amount, including signal equipment, plus twenty percent (20%) for construction
engineering, inspection, contlagencies, and associatel costs with Spokane County.
3 To pay promptly to the County, as billed, for any and all costs of the project which exceed the
deposit amounts.
THE PARTIES are here agreed that this is the whole and complete statement of their agreement.
APPROVED• DEVELOPER:
BY:
SPOKANE COUNTY ENGINEER
TI1'LE:
BUS•ADDRESS;
AFPROVED AS TO FORM•
T SPOKANE COUNTY
DEPUTY PROSECUTING ATTORNEY
BY:
CHAIRMAN OF THE BOARD OF
COUNTY COMMISSIONERS OF
SPOKANE COUNTY, WASHINGTON
1\tnnd-devlogreemaiWev trcfaig
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ClJRRENT °c PRLIJECTED TRAFFIC COUNITS
Station It 4114
SULLIVAhi RD SULLIVAN RD
RD # 4597 NORTH RD # 4597 SOUYN
06/1G/86 - 1791t32
CURRENIT - 21 ,,521
+ 5 YRS - 25 p 1 B^
+ 15 YRS - 38, 758
t 20 YRS - 47, 155
SR-90 8R-90
RD # 8851 EAST1 RD # 8852 WEST
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These counts are seasoiially ad,Justed by qroup mean factors.
Projected co-unts are cal culated at 4% per year.
Press <Retitrnr tr~ continue. PF1E to EfZt.
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CENTRAL PRE-MtX/INLAND ASPHALT
OFFICE/ASPHALT PLANT DRAINAGE REPORT
Background:
A new office buildmg and asphalt plant is being constructed north of the existing Cerrtral
Pre-Mix facilities at the Sullivan Road site. Other improvements to the site include paved
roadways, paved staging areas and gravei surfaced staging and materiai stockpiling
. areas. Drainage facilities are sized to store the first 1/2-inch of runoff, ftom the new
paved areas, in grassed percolation swales.
Drainage Calculations:
There are two drainage basins for the office/asphalt plant sde, these are shown on the
attached drainage basin map. Basm A collects, stores and disposes of runoff from the
southwest portion of the site. Basin B eoliecis runoff from the remainder of the site and
is the largest of the two basins.
The foilowing tabie shows the impervious area, required storage volume, and storage
volume provided for each basin. Only the runoff from the new paving is being collected
and stored in grassed swates. The existing paving, which drains onto the new pavement
is exempt from being stored in a grass swale prior to disposal, as per discussions with
County Engineering staff
,
Required Storage 5torage Votume
Basin lmpervlous Area Area Provided
A 23,150 S.F. 964.7 C.F. 984 4 C.F.
B 1449325 S.F 6,014.0 C.F 71382 0 C F
The swales wnll provide the following storage volume:
.
BasinA (4x66x 5) + (11.5x11.5x 5) + (8x66x.5) +
2 2
(11 5x50.5x.5) + (4x20 x.5) + (19.5x20x.5) +
2
(12.5 x 17.5 x.5) +(7 x 17.5 x.5) = 984 4 C. F.
2
Basin B
North swale (4 x 148 x.5) +(106.5 x 48 x 5) +
(48 x 41 5 x.5) = 3,350 C F
2
South swale 48 x 168 x.5 = 4.032 C. F
Total Basin B 7.382 C. F.
. The attached bowstring caiculabons show the swales are capable of storing the peak
inflow while allowing a.3 CFS outflow (Type "A" Drywell) and a 5 0 CFS outflow (5-Type
"Bu Orywells) for Basin A and B, respectively. The chart below shows the peak flow,
maximum storage votume required for mflow storage, and swale capacities.
Inflow 5torage Volume Storage Volume
Basin Peak Flow Required Rrovlded
A 1.55 592 C F. 984.4 C. F.
B 14.48 70165 C F. 79382.0 C.F
EDUILIZATION CULVERT
The grassed swale for Basin 6 is spld by an access road The two swale haives have
the same bottom etevation of 198100. Two 18-inch CMP culverts provide flow
equalization between the swafes. Inflow calculations for each subbasin, using the
bowstring method, was used to identify the inflow into each swale half and to faciiitate the
sizing of the flow equalization cutverts.
Based on the attached computation sheets, the approximate average depths during the
14 minute peak inflow to the swales are as follows:
Depth in North swale = 6" - 0.5'
Depth in South swale = 11 1/4" - 0 94'
.
The depth in the south swale from the peak 14 minute in flow with no transfer of fiow
between swales was computed to be 1.12'
The maximum ponding depth that wili occur m the south swafe durmg the 10 year storm
event will therefore be between 1.12 and 0.94'. The total depth of the south swale is
1.650. Therefore adequate free board has been provided in the south swale to
accomodate the peak in flow for the short period of time between the peak and when
equilization occurs in the two swales
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B. Reqtii rrd ' 206' Poad!ng Yolume (oJ OLf
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30616
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BONSTKIHC METHOD 4
DETENTION BASIN DESICN 3v-t.r¢
Time Increment (rain) .6-
Time of Concentcatioa (min) ,S'
Oucfloa (c.f.s,) S'o O
Design year flow (yr. ) 10
Area (acres) /0.9(o Developed "C" factor 11.S'9
Area x "C"
tll T #2 t 03 14 r #S T 06 O7 Time Inc. Time Tnc. Zntensity Q dev. V in V out Storabe
(min.) (sec.) (in./hr.) (c.f.e.) (cu. ft.) (cu. ft.) (cu. ft.)
• 0l * 60) (A*C*03) (eee belov) (outflou*82) (115-16)
! ~ ~ ~3 ~ ~o. r. s ~ ~ ~.S 1
~ / o r-d
15- 1. 7 7
I l,~ Zol3 ~
2.0 Izvo I r. gS ! 9.36 2 r 2 43 y 4000
~ Zs ~ / $-bo ~ I. Z i P* 8 Z ~L2,528 _ Z,po 1 S oZ8
30 /000 7' I-J ZaSL,[ 20v o I a,791 ~
3s ! Voo ~ • 91 ~ S. $ 8 / 248 , I Lgsvo I Z, 44$
1 40 ~ 2-400 ~ - b2 ~ s.3 0~Q u. lI "Z o00
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Vin n 1.34 t Q dev * t for t< Tc
Yinm Qdevtt.34 ~Qdev+Tc fort> Tc
306/6
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BONSTRINC METHOD
DETENTION BASIN DESIGN
~-4 -9Z
Time Increment (min) ) +
Time of Concentcation (min) Iq-
Outflow (e.f.s.) 3
Design year flow (ys.) 10
Area (acres) 9-5"7 Developed "C" factor o l02
Area x "C" 33 4
/4 #S ~ 06 ~
? al #2 t #3 ~ r
Time Inc. Time Inc. Intensity Q dev. Y in V out Storage
(min.) (sec.) (in./hr.) (c.f.e.) (cu. Ft.) (Cu, ft.) (cu, ft.)
(pl * 60) (A*C*03) (see beloW) (outflow*12) (OS-Ob)
o , 0S I o. d 1 /2 f 3S 9 ~ 25 - 20 ~ 3r I
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4 Z oc, < < S8 ~ 3.14 ~/4 43a /Z 6 0 0 ~ 2,.e 30
3- 09 /&r ¢s (o L5 z o t, 313 (a ~
9 s I ss Sd ~ . 49 ~ 2.4/ iL4 y4 Z- 117 (0 +0 ~ .30 z
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DETENTION BASIN OESICN ~2t.~~GZ.grn~n•► ~~.E ~d~cs
Time Ynccement (min)
Time of Concentracion (min) S
Outfloa (c.f.s.) 2.0
Oesign year flow (yr. ) / O
Area (acres) 3 9 Developed "C" factor .~3
Area x "C" t.:579 77
fl 1 r YZ C r 13 Iy r rS r 16 17 ,
Time Inc. Time Inc. Intensity Q dev. V in V out Scorabe
(min.) (scc.) (in./hr.) (c.f.e.) (cue ft.) (cue ft.) (cu. ft.)
• (dl * 60) (A*C*03) (see below) (outflov*02) (05-06)
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006 2 . 24 1.34 ?4 / ~ 12 00 ~ - 'l S'9 !
1 op ~ 77 ~ o& /D6 Z. ~ 106oo ~ - 738
/zoo ~ 1, fs ! • 87 ~ //33 ~ 24-00 ~ - I24.7
I•Z( ~ . 72
~
30 ~ 0m0 1• 04- ~ • 6 Z 7~? ~ 3doo 2¢2.
3s ~2ioo • 41 I . s 89 4ioo I- 3 o r~ -
40 I 2400 ~ 4f ~ 2700 • 7¢ ~ .Q 12 33 S40a ~•414,7
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306/6
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SUBJECT ~N.~~ A~j~t..~►.\~- PRQlECT NO 3 a ZS ~ 00 ~ O`
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NAME
~
VARIaNCE N0 AOQRESS 6,
.
JA. 1
aOMINISTRATIVE VARIANCE
PHONE-NOME WORK 5~4- ~~j?
S T ~S N. R
NaHE C ~t~ On . • 4 eW,4,(.p `Is`l 13. 9'o e ~
~
ROAD NAME 5,, \~t,r, PI M lfs`I 2J. 7 p d
~dl H
The fo1lowing documents are needed before the Engineer's Department can begin
processing your variance application as approved.
V/RECOROED copy of deed, contract or conveying instrument these may be obta3ned
from the County Auditor, 2nd floor of the Courthouse - Document must display
AUDITORS STAMP.
1 al descri ti on of our acces
g p y s e a s e m e n t
Le'a~listing of the names of individua)s who will be signing the documents which
will be prepared by the Engineer's Department. These individual names should
appear as the person(s) legally sign their name. (NAMES)
V a current Assessor's map whi ch depicts the 1 ocation of your ropert and
ownership micro-run. These may be obtained from the the CountyAssessor, lst
floor, of the Courthouse, Jefferson entrance, 2nd door on the left.
The necessary documents will be prepared by the Engineer's Department,
Ri ght-of-tiay Secti on, upon provi si on of the i nformati on no ted above. You wi 11 be
noti fi ed when the documents are ready for si gnature. The documents may be sent to
you, however, IT SHOULD 6E NOTED THAT ALL SIGNATURES MUST BE NOTARIZEO. The
Engineer's Department does have notaries available if you choose to sign the
documents at our offi ce.
Please call when ready Please mail when reao
Woti ce to Publ i c No. Ri ght-of-Way
1 ~
COMMENTS
" P
l
Ri ght-of-Way Agent Forward to you from ~ f
05090 •