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11-30-2006~ yfi lr,~f, .L U'i ~..: ~iy :.;! f~~A ±, .,;. ~}i;)L~'~,1 ~{~~ ~.l tl ui 4} in! f~v GR~f'11~t_ d ~ iL. 9 lJ~ #O~A36 ~0~~ ~~~`J•_2~_2vQ~ ~"?_! x' i1~2£~332~£~ ~?6% F'.02 i ~, .'J~r~'v~F ~ ., .. ~.` ~. li F^ r,~ ~~~(itj i«~,'~~~ .'4 ll~Gllf~f~~ zoos :V i~lr ,•.-m~q .•.•.ieVll~,7 A t n y, f sa~l4.)L: C7 ~..IJL VC .~JV~9 S si3 ~1 j' %?y~,''f'J~ ! `'•.,~~ ~1d}; '~ik:~?caa<}{,~r, !~~A'~~ ~.e t~;il~ z t ®z.a vaza za rv zs vzvrae. sv<zeavaa ar: zse rass,..• ..................*..o..'...°.,.........<a <. e, a<a<~<~ ;f ~it~ ![~L~~~l~ } ~.<.ar. . e t . ~{ g ' ~ ~ y Y .....................................................«.~s.,..ze<,zez<<<<r .,se' i~1~1,,,....... ~ .L ~ ~ . ~~kr~.tloII 4 y , ,{ ~g g ~ ~ } o t J ...,.,...>............e...<.~:..<.v e,~ze zs .v v. .e< .......... ....... ... ~ ~ ~& . ~C11~6~' ~ r t ~ % S 'r G6t yy gg /~ cc~~ p !~~y~ ~~,,pp ry.gg yg g y yf 9 pq ' ~~r ~$p~. . ~.g,; ~3l44 ~3tl Rd US $~vl~ ®rt~ 4F&ld'fl~l@~~acsavaana xatefes.aaea. ime aeeesa®a®ms.4V apeso-!]sir0®.btOfiEi§OR&a6.ax 4/ znitri ~ .~gr~rat~ta.t #~ ~ reargtion of tcarmwat~r Sits PEans .....,<..<<.<<>.,,<,,,.~ cY&1l~lt'~ {~ilir~111~F1t #~ ~ ~ Llt"tIl G7t~ W2lt~I' Fo~~tttl~3l1 P'rev~nfiion ~a ~ ~,.....r.,.„,a,.aa<< a,<..,,,a.,aae„a,,.,..a ..................,.....................................~ ~~,~Fitrd~ .~Ll4.r~rt1~11t ^~ C9t1I"~~ ~ontrot 65~~'O~~d1tI0TE.........aa,.,a<a,<<,.<.,a•a<.a<••.•> >,~ 3YD.li'Tl ~~L1.iF~Fi~.T2t Y -- F~s~rvat~on t~~t31I'~~ L)ralTl~ge S~St~ITtS IT31IS~ ~~`IIDTTfl28t'.t °~ III°ifi~ $o Vd~t~r g~%i'~~I1t ...............~..,<,a,..>„ a$ ~inia~ i~.eq < eerzt ~° ~ of~"'Tr~atrn~nt s.,,,aa..aa<a.a.a<.,<,..,< ................ ..$ ~at~r ua~ity y~tt~zx, ............................a<„r<,a.,<..., . ,................,..,.......,.... ,.~ ~~~arnur~ R.~q~iroazt~~at #7 •--~°~o~~ C:otrot . , < ................................................,..,. .. 8 ~Sl~i'l.~rit~r~~°-~`~i`~'~JE`S1S&S9C~ C~~rC~S.,.,..,a.,,,,.<,az.,<,.a << ... ................ .. < ... .................................................<.,, < yStrzaa.a,,,,,.,e,,,.,<<r,<, to C9t~Crol ,, { q ge ~n..,.~,...,.,....,e <r <ne a,sr..,.z aa .............. `~.n Ll~.~i ~~4 ~J~~ ~ ~{$Y'~b'f'"~'~Ili.~ a~~°~t [q .. 7 qty g ,,q [g 9 e ~n~ k6.~C~~~Z'n `i~'nt TY'~ "'° 1+ro` ~'t4tdrC F3'~~f'vC1.a~~ ................................ ................ g y ..7 i~nita~. R.~ttieta~oatt #9 °~ Iasi at~rshed PI i.~~ ...............<.,.......<z<,..,e.,.,. ,9 ~~in ~.~azir~rrser~t 1 -- C)pcrat~~n end ~~r~tenance ,,.,<,a<<,a,>>,,,.< ............... ..9 ~taon~i idanc~ 1--~n opal ~,iabi33ty,.,.:a<..,<,.,.,.,.,,.< ................................... ..9 on tifi~~s, ~a~ility `asp ~d ~CD~cl~.ration of covenant....<<., <.9 fi.~taon ~aidc °~ Sits a~~sis aid Ivlite~at~on.<.,a.>aaa,aa.a„a,....,....>.....~ .- ~~,tt., ~~~a~~°A~ ~3l~osasaa.a.erneaa.:eaameseaaeaaeea•aacmaeaacaascesesaseasaeaaceseveseaswarasaaeaaasroeaa l ~t~~ ~ t~ a..a.,.,.®aa...ga.>s.a.,...aa............a...w.,.a ........................a.,....,®..,..a..,.......a,..,a..<..<. l ~ ~. ~.. boa ''~~~ ~'a e 1 far t~z°;~ ~~ fror I~ic~d~~irt and E~e~~a~ts ......................................................>,..4 ~t~nt~~n ~'c~~l ~es~elt~ for Road y prov~zzz~nts ......................................<,..<5 c~. "~ ~ Follows Face 1 ~.ocatio~~ p .................<......,,,,.a,,..,.>..<.,.a<a„,,,,.a.,,.,,.....a.............,...,......,.......,........ g 2 ~rair~ae ~sr~s ............................................a..,..,......................,..,..............,........... l ~l~f.,~rlij`(} F'.U4 i1i X41:'+`,~~)G-~ i;``.ui ~-AX _„a,2°' u?+:~~a «~A`~' ,~ ,~~~;CN;?#E 63 1 ~ !.! 2""PvS2l~a X"a - 3Q74~ *'1~~+~ ~Ub~~~t~ ~L?5..tr.#~ d" .UJ it/':,:~f'~vi1R 1~.3<i ~ PiX ;`Q~Jw~a~'''.16 iaii~'", `Y' ~ iJ.`~i~l'+RPl~ a icy of ~~Irra ~i ires;ted tlaa~ tha resluirert~ents of the 0Q~ V+1€~shin~tan State e east aI'I;eala Sts~rax~water ManaeYnent Manual far western "tWashingtan will ~~ applied this ra~ect. 't'he g~rm~ect g~r~pases adding rraore than S,aaa square feet of ~~~ irrapesc~aaus aarea; therefaxe, ~ °m I~.equi.cernea~ts #I thraugh #10 apply. Initial rrxaellnl; was eaa~let~d asir~ eeepted sr4eEhads far the Highway Rursaff Manual and ~izy ~}°~"~Ir~ 3 Stew~t~.s ~~~~t r~b~'~~~av~rry Ir~apr€svemerzts Stcsrrre C?rafna~~ T11t tarn=e~rzber 2aDd Nt>4-°',~.~~-,.;iii°I~, ? a` ~~ .:i~i~~;~:~;i~{~~ ~~;, Y.t~6 1 +1~9 ~ ?C'- "1~ .; ~ ~~^~; .'_~)~;:'~3,~~1~~; BRAY ea CtE;Q~iP~~ a~ q ~ r~ P "~ \~ ~~Q ~~~i !.tlGAT'it~N ~ ~~ i ~ ~ `~ ~~ ~~ .~" ~ ~_~ M,N +~' ~y~ ,~' f ~~~~ ~~~ 11,1'~81~'.:~4:db ;t~.wa i°,~~C ?a'4~,'~i;a:7^i`F, ;a~:,4Y ~~: iviS~+J F;P1F ~. ~- 6 e ~~~W ..~ ~~ ~& ~~ _____~ ~~~~~ lgt 6}1bON F r `fit;'°>%ty?~' F' , ft E~ 1;~y i q, ^r - .,, ~v..'~'~{i~ 2~~?~~f i? ~u~i~l~~~F ~~rr4j(,i;~`(i ~r~,~ ~sboa~rze, ~~~, ~~recultirs~; E~~=~~~~r~s e l ~`~ manual ~ zx~odel~. o facility design was modeled using the Nadel adopted in the ~{i I ~ ~fanual(VV~m'. 'phis report uses the outline of the Zt~t33 1~~. manual fsar the falleawin rniniznurn requirements. "I`he pity of Yelrrb has e `t authority for the project for genexal pe its, ~ :~ A:IS 'fhas ree3rt identifies o subbasins, nartlawest and southeast. ~ hh~ teve~s Street I'~ aaway naro~ernetats are included corrapletely ixa these two segments and are discussed i~a this report. ~`l3cse o drainage basins are identified through topographic and e:eisting coxsveyancc~ infea atiorr far this porticxa of the pro~ecta these basins are described as f'oll~a~rs ~: °he southeast basin is sho ire pigtxxe 2, ~'he southeasst basixa is apfaro~cia:~ately ~.~2 acres, with approximately tl acres contributing off-site flow tag the praject> to water runoff flaws generally to ~e southeast towards Forth l~'irst Street. surface flaws are callected in catch basins and xaadsido ditches and con~reyed to Yelzgx creek. ,SI"~'~ "fhe cortinutatas rectax method dons neat lirrait the time to 24 .hours ar any other set `savant„ tirnefranne. Irzstead~ tho ceasatirzuous method eaesr-es historical precipitation retards and doterxxxirces the statistical likelihood safuret weather canditions that may last for several days, or fax loss th ~ hracars. .s regcrires rrAOro detailed data input fear precipitation. recsards d mach rxatare coxxauting owor. e ~ ontineaous recoxd rrlcadel used Igy tho ~ ~~ of Yelm ~~emC~er ~~~cS <Steuer~s Street 1~` ~o~cfrvay Improvements .storm I1r~ainage TIR P.Ct~ ~{ w%`"%.-'Si It `LU it + wi ~~~ uJ~JL(j ~~ ~a~{S ti' ~~ ~evCiQ{i ~{~ ~r Bc ~s~iorn~, Irr~., ~onsultang ~~gfneers ~ ' is tl~e Western ~~as ' gton hydrology model (~J~~'1-l( and is s. ~ersioa~ of the idyrologic itnulatic~zt Pro am Fortran ~PF), current regulations may use one or ties ocher, or bocl~. Initial tslar~ning desia for this pro,~~ct eonapleied using the B~.T .model. Modeling oz final design `amass compicied using W ~~ to arhara ~~rban I~ydrograpb ~I~I.I~I~ sto titer modeling program ,gas used to ~~~l~q sip else ir~~itratior~ facilitiese 'f°he rogr es ipervio~s surface, soi3 type, slope, length or floes path, rairafail .punt anal rainfall pattern, and detercnlnes the peak tiff rates, 'T~~Xe slope o~ e s~abbasir~s ranges from 0.5 to 3 percent, and averaged appro~;izntely= percent, '1'o s~ompl,, with e ~tll ~~ ua3, e basins ~~~ere modeled wing the `°JVesterrx %ashirbg2ar~ ~drolo P~lodel ~, l~1} developed by 1~(~E. ~4r final design, modeling data fr~arr~ ctta zraetbods arrc presented eltaw, ,"r~°a~r ~ar~~t?~`5~"~'rsac~.~cr~~ 1rn~prnu~m~nts StQrrn 13r~~na~e ~'I,R November 2~~16 lp (I ~iJ~(1 ;1 d~E.,~iY"u J°'Gt'~~ iii i ~J 6;1V ~OvJ!_'+~~0 JV o .C`, LC1 I /r;~! Yf?(}t; 7 : . ?~ {` i~vi'r 4f!dJ `r~~ '=.!c t~{'{~~1~i tt ij ~,f~!~S~~E: ~ (f ~ ~%~~`°(~ ~r ~s~arr~e, Ise:, ~'oa~ass~ttsas~ ~nineers 'I' i.l~ 1 ~ well e~eulating pe~lc offrates$ sto mater modeling programs mute the design storms tl3rc~u ~ secia~d infiltr~.tion faeillty. ~'he S13 model was used far initial sizing and the tz~zal deslgr~ was routed through ~J ~ to assure compliance with fine ~4i31 ~C?~ aa~ual. . k~sfllz~~tiou l~csfgra `l sae infiltration regttirer~e~at 1` 'ts ~lo~v fir ~azic~~s staran design events. ~"lze developed pro~~eC 2-~re~r flow i~ limited tc~ can~~halfth~ pr~d~v~loped project ~-3rear how. C)ff--site fls~~r are included iza e rs~utiug but are nit pt~.xrt of sizing detentioa~ facilaties. The d C#ty of 1'elm ~avem~S~r ~~~~' ~ ~..~._. ,Stevef~s 5"treet N~Roeariway .Improvements ,Storm .t3ra~n~ge 2°IR F',ii 'ra~a~~ers ~.7sed fir odelira$ end ~esetlis ~1,/'?.1~`7~jf,~~~ l~;a%~ ~;5~~. '~Jr'~'ta..'~~J~ l~S':?~`{ it UJ~OF;PrE Cirtt~ c4c d?sbarrrre, Inc., ~~nsultang Ertgineer~ =dcvelp~d ~ - ~ 1 ~~ a° ~°~ lianitcd to the predeve~oped respective design e~~entsW ctcncr~ xn the nartwest subbasir~ is designed to use starae capacity iz- tt~e infiltratian pipes cl voids in the gravel bacl~ll, 't'he snt'iltration pipes will ically be located elz~w flee treatrraerat swales in the pl ter strips. alcul~tic~r~s fcr e etentian si~%rag ire included i~ ~,ppendaces~ 'I"~~le,l~ 2 Ater t~u~iit, ~`r~eataent e necessary b~swaie Icn ara~! "dth was caicutated for the r}c~rth and south slopes of flee bira. ~3ioswalcs °11 lie required on bath sides of the road, and each is required to 1-i~a~°e tfie a3irsaensians listed helaT, ~ia~~ olY~l~a _ ~ ,stffiv~ns .strut ~ t~t~4L~'ray IrYa~xf°~va;a~~~dts Szc~~°m !?rsarrrca~e 7'I~ Nd~smber ~(1(1tS !~v 12 (3 "='~' ete~~i~~ ade~ ~.est~lts ffor ~2c~adway Irr~prc~vements i?/'4°d/ ~'f~ t~,, =~ ~h~°=. 'm .}~,''~='~t)E~ iar~"'`s' `i U~=~;UC•?PiE ~~' E~,'~'"is r~ry i i;?sba~tz~, Ir~r-.v °a~ar~altir~~ ~r~gara~sr,~ '~' I,E 3 i~s~v~le ~a~~ ~ rr~je~t h ~ lcsta.i ~f ne~~r arad e~istan i~ctper~~is~ixs surface that exceirds 5,04 square ti~ct thcref~arc must ree a tt~rrra~rater bite ~~an fcr incal gavernment ri~uiew. 1"hc ~~ ~~at bite ~~ax~ must ~rpare~ ~n ac~ardancc wath chapter ~ of the 20Q1 I~©E ~' _ City of Yalm ~da~~rsab~r .~1~~ icre~eras S'tr~ec ~~~ Roadway Impra~emerrts Starm .t~raznag~ TIR P.13 ? i %"~,~~''~3 `_'..:;.~ FN,„'£ (~i~?cyu_ %Cj~; 4a~°;Y b~ i1 ;~~.1(;!iG ,` ~ .. W ~r~ry ~ t?sb~rns, ln~., Ganstxlting ~n~ineers Su~,l. 'C`has "I"~~. lra~nn r~tli thr: l d secifictiozrs ~.or the project include the i~~o ~tao~. required ire ~ ts~ ter Sate Ply ~vhach includes the follavvin: ~~I~1 ' (~~}~ "C #~2 ~- ~~1"~STItTT~'i'If~l~t 57CCD A'V`ER °~ ~~'T~~l~ ~ 4'EIV"~"I~1'~ P~A-l~' (S''4~V~~'} ~`he prrtject zs ~ re~3e~el~prrtent pr~j~ct ~d therefore rtau.st comply with G'~nstructacn SLVPP {era~e~at: thr~c~taa X12. ~'1~e et~rner~ts inelu~e .~ f~lls~~,zn~: ~ le~rertt #~ ; ~'~: le~x-irt ~;irtaats l~le~zaerat ~; ~stalYS ~anstnactaari Access ® lec~.t #3: a~rateol Flca~v Rtes ~ I~~e~ezat #~~: Install eizrte~t antrols Meet : Stabilise Sails Elerrt~:~t #: Protect Slopes ~ lera~ t ~ : Prefect l~raira motets ~let~xent ~: S~~.lailie ~h els grad Ctufitets lezrtet~t 9: o~tr°al cllca is ~~T11~Tlt ~ : ~+i3il ~ I~eW€ilellli ~ le~ext ~: #~dZitBlt~ 9 ~ Eletaaer~t ~; `~~E'd~~ e Project : tI (,~t7i ~ rd~' -- St)U ~~N f1-L ~° IPC}I.LiJTI~N curse ccs~tsct cif ga~~luta~ra ~°ati ~+: ~iaciudeci zrz flee crest r~~ctageraaent practioes during c~snstr~aetior~. Igo x~e poteal polluting sources gall result from this project. Water ~. ~f'~'eEr,~ _ _ _ 7 .~~eve tree€1'g'~ R~ra~vs~ ,Trrx~rowements Stc~r~a ~rairrcrge TIR November 20l}6 !~~ v ~a~r~-~c~ ~i%M'~,'~.'v~3~ ~~:ab ~,~,'; r~~4.~'t3;a:,:~'~1h =ah=~A1' ;v (suB~3h;~h~ ~r~ ~i E?.tbvrn~, Inc., ~'vnsutting Engineer de eta water t`laws to ~ reexistin aar~ditiaras befare discharge. `The sautheast bira leas ~.~ a site c~n~i~ti~a area, `phe pza~eet will ia~cz~ease peal;. flaws by apgr~~iztaately cl's far e I d~t~ayear e~°eztxe e detentian s~°ste e~tcees the flaw recl°~Ireaents d ~lla~ existing brae flaws to continue their e~.istin~ lz~rdroloy. an~rcyanec ystean r~~salysts a~ad I3csi~n l~i~~ ll~?~T ~- T'~,~.IaiDS P~24T~ ~t3N ~xistiz~a suY°t'ace ~1aws teed wctl~rzds iaA the vicinity of ~'elzra Creek, 'These wetlands will nit be irnpacted by the pr~~ect~ Iv`a b~sizr ply exists fc~r e ~'`elzrr Creek dr ` ge arcs, N1I. .~ 'I~iI~~IT ~0 -- APE °1`i~IV ~ NTEI~t~lY+GE Tfie sta drairaae irtspro~ezraents will be sraaintr~ined irr ~ccardarrcc with the Cz of '~eirta si lords, The treatgnent biafiltratinn systems will be maintained an acenrdance with the ~ eta water ~~ era~~rrt l~l~nual for ~Jesterra Washingtan {~"alume 4, Chapter ~n ~FTI~I~L ~~~~ #~l -~• F~~AI~CX I,I~~II1I ~asad ~aaaiiticsq Facility ~a~anarics, and eclarataort 4f covenant ~Tnt a~aplicable, C~~T3~~L C~I~~~ 2 ~ (?~°l~°~SZ`T`~ ri.L~'Ii I~ZIT~+G~,.Tif~l~ _~°ity r~"~~t~ _ 9 ~"t~en~s tr~et ~~~ a~ocr~~rcry Itnl?t~QV~rrte~rts atot°rn L~r~l~rsx~~ 7'fle N. civevn6~r 10Q6 ~0~;-2J-~~Ca~(~ 9 ~' n 1~ ..'~~0'7£~332C~F~ 9Cia !~~)1h%0~'4 P.1b ~+ ,- fi .~ y~, ~.r .~i~ `',' ?~~p !a ~i ~~~Y' ~t l~~F~~.~PI ~dL ~:1 °t1~ri Q^tt ~ tl~~~i v._ ,.:~~ ~.,r ~ Sao ~~ ~ ~s~csr:ae, ~nco, ~aatasu~tdn~~'n~~n~ers ~ ~sir~ ~ ~~ts ~r the ~x~el free rairu~e axes. .~ ~' 1'~a has$~z ~ w:~i fir tae elr~ creek aria. The ~~~ caf Yelm has perr.t autharity Apr t~a~ rt3jct :fir ever ~rxt~~~,~. ~'~} of }`elrat .7~+<av~rr~b~r° ~t~4~ ~teu~ras Srr~ef .6+1'df~'.R~Ctdway ftttproveaazents .S'tr~9m Paratnetge T112 l~Coti-u~?-'uJCs~; i`7:1~, ~sf1au833tt)E 9~% P.i? ~ ~ I'~y;/ ~(}'.i'n_' ~ . a". ~°;°t Y, ~!)~ i.'{3rri ~„~`' _, i~ ~~l1(~~l~ 1 ~.lE li,`:?~i,~':~%%'t;; ~~.'~ p=~,;;. `?~3~;~r~;':~:'.~~Er GF~Y ~~ ~Iti>EOP~iE ~- °~ t'~o.g ~~1~~'af:?C313f; 1~h ~,A~%~ ,_''i;'~'LS34~i.1k~ l;e~~i`3j ., L!a>~{.3~','~~k F' , 2 tl