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27640 PE-1737 VALLEY PINES 36 sarz SURVEY • l • 'unit VLe-=?; woaciland ~*rviigr r; noc in a range aPtB. Spt- tePrace5 Rilil gIacia1 tiflost piains fiear Lnlbert and Chai- . lzans loam---~:apaUilicv Ziiiic 1.1- 00dTanT "roup 6; nui Larov in tlie centr.il pa rt ot 6 pukaite CounGz-. ]Costi -lopes in ;i mnze sate} lire ;etween 2 attd 10 pez•cerit; % fen• .ire _-teepe:• i ,~nre- Spvicine compiex, 30 to 70 percent siopes (SsE)--Fiiam sencfttive pronle : 60 tn 70 percenc o# this 4:omp1ex is inocleracely s1ialIow r co 2 incaes, v-ery ttart. ;rayish-hrawu. re;F Pn.sble _,rarclly ti pok-aiae Ica.im :]trom 15 to 2.3 percetZr is vpol:ane Iocim that caarse saa(tr touFa , 3raaular s[ructure : neu[rai .,inel:arizrt»d ha5 1 i]ope L'a17g0 r7f 69} co 55 pei'C0nG: LC1E L'eSC Co1151sCS +7f areas harg an nrganic mnc i fnch [hiik ars the snrrace. _~foSCDw ao1l5 LIId ❑LIleP' SpokR11e rO115. ThE: drir)flei':LCe1y 'w La 1' inciae3. darf.-UrQwg. isaa6fe ZrareSly eoarse :.ulilc 1,j:aLZl . sha.llo►r Sp4kane laain 1ias .ti surface l,irer 3 or 4 is3ches ~~y[go g~yanc ~~miarb~ eii~ sbi~eo~me~~aaei~s si~ ~~y- , o.ir5e tlasnner than tha~ of Spnkaiie 1oarn, 0 tn ~3,0 percenG slvpeW. sand , stightly ,xit(1. and is 20 to 30 inches clee ta bedrock. Suxface runorf qs 24 inches gsave11y couaSe yand. rapid ar very r:apicl, an tlie haznrd of erosion is very The color ot the sicrflce 1aver is cerv eiark ~r:~ri~E~ F~~•a•~-n severP. tfl v~rv clat~k brawr~. :Cl~a sti~azl r:~nzes ~'rorn ~~zrfi bra•~n 'T~~TS camplex is ttsecl :~s ~rnr~~l2and ai~~l f4r litnkiec.l ~raz- ta l~.rc ~rePlor~isli k~rron-i7 in calar anci tirnm ;~gr2reIlr ~anc~~r ' ing. (.:],s a com~7fex: capal~iliCy uniG ~vrle-~.. By cc~m- loaLrn t❑ Vr~.velly lo;~m~- coarse sand i~i texttsre. d~rr~~~-e11y pr~nents :Spvkane loaan. morlea•aielti= s~~s11o1r-c~.p.ibilit}• coarse sancl Fs tit a~~eptl~, ot t~ 3li inclzes. Ii1 ~oztie .~re;~s tunit VI.Ie-1; wofl(lland group noc iii a range site. cohblesianes otcur tILroiIliiOLxG the protile. -ks mucli .is ?iJ Spakane loain-s: Lipabilgty iinlt V7e-2: icoocll~tind group percenc of sr~rne are.is coisiscs ❑'r nther Spriz~_*daie =~~i1_ a~at in ;a ran~e ~tte~ a.:~:fop percenc af B3a~i~z:• _ra:~~•ellr siit lo~~m; cilicl ;~ei{,etr~ ox ~Ac~kane very ~rociiy cvmpleY, 0 to 030 percent slopes CIarrton ~ancir loiin. {5iC}.-Froru 50 to ti~] psrceaiG az t4iis rz~app~t~ uniti is ''Flis soil Fs snmewIza't exces--ii•exc drained anri '7Rs rriotlera,tely shallow Sprak-zi1e lo:ain, the resc conszsts of moderarely rapicl permeabaIiey It liolds tess cliaai 3 :ncaies crr-inita rvek outcraps antl of lrascore sails or ocher apo- Qf water thaG plants can ttSe. zt is law in ferillitv. Ill IiaIle St71ls. ThE5e sQ1l5 ma]Ce ilE] la petff"nt Rf St]IT1Q tbCe:is. a8I10PaI. 1G 15 er13V t0 wOrIi. RooL5 i]$ t71Ast 1]IJ.ilC3 ~]Elte[1':1Ce {As a ca3nples: c~paE~iiity unit VIls-~. Bv eompa- ~11Zy a few inches znuo the ararellv coarse sand. Sur*.ice nents: Spokane laam, moderately shallow-capabi3itv ruiioff is tilaw, and the hazard or erosion is slir;it. uniti GIe-2; wocadland ~rflu i : noG in rarage siLe. Roclc _1~ost ox zhe ~bcrQ~ze is use~~ a.s ~ros~cllancl .1ii~i ~~sr ouccrop~-ca.ps~bility un~ c~"I7Is-1: i noc in :s c.woo~ll~e~ ~zin~'. Y iel~~; o# far:s~e aae low. Less tl~an 1~} perceP:t grou,p or range site) ~ M~x. is CL1lC1WafEd, and only zt few smali area.s 2re irr?o,a~ed, Spakane very rocky eles, 30 to 70 perc2nt slopes The crops nown are a1falf~d and --rass far hac ❑r pascure. rrlvcleel ~~a~11o~ 3 Percent af this mappin; L~z is ~ahe~.c Qr a-re is ~ocrn eluring reest~lb$1s17menG of a~Zf~Iia ..pok:~ne loum. '"he resc consisis of and grtiss. ~Le~u~aea res ond ra sultur and sots~QCames ta gr~.nite rock aiitcrops. barvn. ~{~C~.p~.gility u.ni ~VTe-2; woodlan(i ~~•oup I i; not 'Tlle acreaga is ~z4e~, for timber :~a~~1 for ,~razung. '~he in a rAr~~e szta} use of tractors for io„~g is lamited. campies: Sprin;dafe gravelFy Iaamy sand, 3~3 to 70 percent eapabilicv ~anit ~"II4-='. E~r componen'cs : Sps~7~ane soil slopes (SaEl= This soi3 is moderateiv exte.nsive on terrz~e -capabilitv uni't VIIe-1; woodland ~raup 7; not an a bre:~~ ansl collurial slopes 2fong rriajor drain~zes~a~•,= isi r:znge site. Rrsck outcr~aps-c:~p~.bilz~t=unit VITIti-Z; not tlle centraI part af the cauntv. RepresenGative ~rc~nle : in ~-oacll:and ~rabTp or san~e s~.te} Spakane e~etremely roGky epmsplex, ?Q t0 10 pCf CCritcz'^"t~to 11 incfaes. dari.•hrown gracelly- Ipttmy snntE. aetiEral: san,- SlOpeS (SuE).-FrorFl tc3 erCEi~L of t~115 m' lrl~ uniL ulac strueCUre az~d slfghtly cEari:er coiar in upper :nc~aes. P ~P ~ 11 ~0 1 f iuches, ~raR•n grasekly toa.my sand : fetv darl~-Uro~rn is .ti rr~o~3era~eP~,• sii~Ilo~r ~pvk,ine ~oirn CI1RG h:~s a slape ana retldlsh-t~ronn maGtles ; neucrai r:Lll~e flf CO Yi perCQriC. Tlle T2SC ct7t15I5L5 0# r❑Ck DLTi- 14 co 60 iuches lra'atvn rB1`y grarel9y coarse sand ; aeu[.-a1. crops. The acreage is used fvr timber and for ~ra,2inm. ~'he teg'tura of the ~urfaee Iarer r-an~s fz'vm ~r~.cellz (As a~ complex: c:~p:~f~idicy iinit ~'i IIs-?. $s campa- laamc san~~ to grai-ell~- ar cobi)lr sa.nct.- T>>e ;~'r~,i•e1 eoai- nents : 5pok;~ne sflil-ap~zbiPatr iinit ~+IIe-1; ~-pos~lan~i tenG vt rhe rubsoil ranges from 40 ca 70 perr.enc. _L; miacfi ~rotap noi iza Li r:un_e stte. Idaek 0iatcrop;-Cap.1b11Irv ft; 10 pel-ceixc oi Zvme zreas cansiszs of ]Iirble loarny LnaF-se iznii tiZIIs-1; n~r~ in ~roocilin~£ group ar rsn7e site} s:~ncl, i] tn ~3D ~aercent -lnpefi; 2n~1 ot nt~ier Sprinar.i:~~~ ~o~T~. Thzs SOL1 is snmeWilae esLessivelv (lr-Linecl ,intl his mod- Spr1ngd211e Ser1e5 eratelw r%pid permeabilicy. It liolds Tess than 3 inelles of "vater that plants can iEse. The fertiliGy zs 1gw. Root pezie- 'I'hs Springtlale series consists of somewhnt escessiveIi- tratian is cZeep. Tlie me nf machiner}* is diffictiZt. C-urface drazned, conrse tescurecI and modera.tely coarse cextured, rianoff as s~ow to meclium, ancl flie hzzard of erosian i:s ?ravelry nnd cobhlv soils. These soils formecl ira _71zcial slaclit to moderate. outwash rrsixerl svith stama ralcanic ash, under pvn-clerosa Thas s4i1 1s tiseel as a saiarea of ;rar el for cvncrefe Thei•e pirae and nass. Tliev ara nearlv levei to We~a steep soils is same ~aing on the less sloping areas. batt ~•ielc~s of on out►v~,sh terraGes anel fl❑od plains. The ;~aisaual pre- forage are low. (Capabilitv unit V~ls'-X -~v ;ooclland eipitatian is 15 to 18 inches, and iha frnst-free seasan is r;rou? lf); nsrt in a xanze site) about 144 days. b rin Soils of che S~Sringc~aie series are iisec~ i~or aIfalf~. ~ :ess, ,~lvp (Sx~]. sai~ ~~i"s- ar~d ~rain. The~~ are aiso usecd for grazing an~i as ~ick . thun~ ~~t ~rf S ~gr~,~~,y ~voodla.zx~l. 4 per•cen~ sto~aes, €id ~~e hl~s~~ SPringdale grave1Zy sandy laam, 0 to ?U percent is t~v • ~iu 3 es. "s snmi hs~ n ' s14pes iSw89.-Tliis is tlie dominant soi1 on the otiitwaslh ~t~e pT~ts ean u~se~ ~},S ffi'tIC 1-~5 ,~.{~,~BTEgllso,uorrlei ~ ` ~ SPOKADiE COIINTY, WASffiyvGTOV 37 •aie ' c,onsists tokother Springda__lesoa,n • as muchis Tekoa gravelly silt loam, 20 to 30 percent slopes . perce consists of Bo~ner o,ndtCIiiyt~n soiIs. ~ r(TeC}.-This. b avelly soil has medium to rapid sttrface 'Thts used~' fo'r `tsumOO'crops= i►s"Sp clale runotf nnd a moderace to severe haaa,rd of erosion. About g velly sandp~~ot~m;-'!0~'to'20i4pet~cent"`slop"e"s,"°btlt~pces,~ o percent of some areas consists of Bernhill and Schu- I~ g er e.t.d_s~: a abilityifriit'~1Vr"'e-5~;~wbodlaadrgrouR; mticher soils. 1~51 This soil is used prunarilp fortimber production. Small '-,*Zpring a e co y san , _ tireas a,re seeded to small .-grsin or to grass :ind legumes for (SyB).-This soil contains gra.vel and cobblestones at a liay or pa,sture. (Capabili•cy unic Vl'e~2; Nvoodland group deptli of ?Q to :36 inches. -ks much as 10 percent of sorae not in a ran-ze site) c-b sreas consists of other Springdale soils. Tekoa verp rocky comples, 25 to ~ pe~cent lopes This soil is used as woodland and for grazin~. (Capa~- (TkD).-From 20 to 30 percent of this mappin~ unit con- bility unit VIIs-1; woodland b oup 17; not in a range sists of sandstone outcrops; the rest is a. Tekoa gracelly site) silt loam that has a. slope range of 30 to 03 percent. Ti1e acreave is used for ;razung. (As a comples: capability Tekoa Series unit VIIs--?. By components : Tekoa soil-capability unit VIe-3; woodland group 7: not in a ran~e site. Rock out- The Tekoa series consists of well-drained, gr.i,velly, crops-capabilitv unit VIIIs-1; not in a woocllancl group medium-testured soils. These soils formed uncler conifers or rtinge site) and orasses in weathered sandstone, qua,rtzite, schist, and shale. Thev occupv zently sloping to verv steep liill~ and jJhjlg Series mountainotis areas. ~he annual precipitation is a.bout 22 inclies, and the frost-free season is about 120 davs. The soils of the L'hlio, series are dark colorea, -well Tekoa soils are usecl for grazina, as wooclland. and as drained, and meclium testured. They are verv deep for wilcllife habitats. A few small a,reas are used for r*rain, the most part, but bedrock is at a. clepth of M co 40 inches ass. and le2umes. in ;ome places. Tliese soils formecl under ~ss in ~lacial Tekoa gravelly silt loam, 30 to 53 percent slopes till mised in the upper parc ~vith loess :~nci volcanic ash. (TeD).-Tliis soil occurs on Tekoa ytounta,in and simila.r They occupy gentlv sloping to modertitelv steep uplands. promontories in the countv. ~Iost slopes tire between 30 The annual precipitation is 15 to 21 inches. The frost-free and 45 percent. Represencative profile: season is about 140 dars. - o to 1~ ~nches, dark-brown, friuble e stvelly silt loam, granular L-hlia soils are used for grain, peas, lentils; grass, alftilfa, in the upper 3 inches ; nentral, grading to slightly acid below vegetables, and orchard fruits. a depth oP 3 inches ; undisturbed areas hnve an orgunic mat Uhlig silt loam, 5 to 20 percent slopes (Uhe1.-This is i tnch tr,icb on tne s,ufnce. the dominant soil on Peone, Orchnrd, and Pleasant Pra~i- 14 to 20 inches, dsrk-brown, Pri ~bie gravelly heavp silt toam ries in the central part of the councy, which receives 13 to that breal:s inco prisms I to _ inches wtde and then tnco 21 inches of ra,infall tinnually. It also occurs on the alacia.l angnlar blocks Vs to % inch wide; medinm ucid. ~ 20 to 38 inches, pellowish-brown very gravelly loam; musstve outwash plain in the western and southwestern pares of or flnely lt►minuted; meaium acia. tlie county, which receive 15 to 13 inches of rainfall. atosc 38 inches fractured sanastone. slopes are between 6 and 10 percent; a, few are sreeper. The color of the surface Iayer is brown or darb brown. Representative profile : The testure of the subsoil is b a.celly loam or gravelly 0 to 4 inches, blacy, cerp frinble silt loam ;granulsr strnccure ; silt loam. Fraccured parent rock occurs at a clepch of 24 medinm acid. to 40 inches. As much as 3 percent of some areas consists 4 to 13 inches, very dark aray, verp Er3abie silt toam above s of Bernhill and Schumacher soils. depch oe io incbes ; breuks into plutes ViQ co inch thic6 ; This soil is well drsined and moderatel ermeable. It sughuy acicl; very dark brown, very Priable silt lo:~m belo~v holcis 5 to ? inches of water that lants can use. The fer- a depW of 10 inches; neucrni. p 13 to 42 inches. darli-brown, 6rm lonm, friable Ueluw adepch of tilits is low. Roots penetrate to the sandstone. Surface 32 inches; breabs inco subangular btocks 1~ to i uicll wicte; runoff is ra.pid. and the hazard of erosion is Sevel'e, neucral. vORe Of this soil is cttlticated. It is used for timber, for 42 to +30 inche?, brown, cety Eriable rery flne aintlc lonm : arazing, and by wildlife. (Capabilicy unit 4'Ie-2; wood- neutral. land group 7; not in a ranae site) The color of the surface layer rannes frora black to cery Tekoa gravelly silt loam, 5 to 20 percent slopes aark brown. The testure of the sAsoil ranzes from zilt (Te6).-Tlie surfa.ce layer of this soil is a little thicker than loam to very fine s1ndy loam. Lime occurs in places below that of Tekon srarelly silt loam, 30 to 53 percent slopes. a clepth of 36 inches. In some a,reas tis much as 15 percent Surface runoff is medium, and the erosion hazard is mod- of the subsoil consists of cotirse ;ranite and busnlt sancl, erate. Surface gravel hinders cultivation in some places. gravel, and a few cobblestones. Zn places a ~?'1velly and As much as 3 percent of some areas consists of Bernhill sandy layer is present at a depth of 36 to 43 inclies. As and Schumacher soils. much as 10 percent of some are:u consists of Bernliill, This soil is used mainly for timber and gra.zing. A few Cheney, Snow, and Hesseltine soils. • small are.ns are used for small grtiin and alfalfa, or are Tlus soil is well druined and modera.tely permeable. It seeded to a a,ss and 1 bwmes for pasture or hay. Yields liolds 7 to 11 inches of wa,ter thut'plants can use. The are fair. Grain and ;rass crops respond to nitrogen; fertility is high. Root penetration'is very deep. Tliere is 1egumes respond to sulfur and phosphorus. (Capability no diff'iculty in the use of furm machinerp. Surface runoff nit IVo-4; woodland group i; not in a range site) is medium, and the hazard of erosionis-moderste. .i ~ a .8.~.. . . N 0 V - '•8 ~ ' ~'~'kw~ `;~,~`:.~~r ~ S ~ ~ ~ ~ ~ ~ ~ o' .'C)' ~ • ~j ' ~ ,~p ~ / n • ~ ~ ~ ` ztr ~ ~%,1t ~ 1'; _ ~ ~ ' , 7 • r,', ~ ' t . ° ~',.Y. r~ ,.r :i t : ~~4 ~ •I~ ,i • irta~ , ~a. i ' i t'y~,' . ' 2 m N A IY A•N A(V A N A N~l~.'~'.~~•t~'' '"id'.~.. ';•`-~",t?i~-f t'~ a ~'t~ V ~ ,~(yi~` { n u~ ~ ,c"~n~ ~i`i ~ii v~ c"i~, v~ e~{~ e~n c"+n v~ c`y,n c~ri c`~i~ '~.,4" i% . ~7, ~ . , i' ` :o 1_~~A • L f "#~M~f . fay~~ 4 A r~`, % f ~R ~ ~ ~~j k `j.4~. ~,~~?~~';-;s• ' ' • 't~".r • : ~ y~ yyyI.~, , n~,•,'' • • . . C!j'c~ , ~3 :.4 fr;~~r, i., t i , t ' ' `Y'• 3.l~,,~. _ , y C ~ A:N .n~;IV •N h,N A~ ~N. A' N' A IV A~1l A' ►~'d ~ ej ~rfZ ,~2~ ~ h+ h+ N F~+ h~ F.~ V F~+ F+ 1-+ r-+ 1-+ f-+ Fr • ' a~. , ' , - .~ii cn cn cn cn cn tn cn cn cn cn tn cn cn d2t ~ , ~ t , • . '3 ~ - . , . , . , • ~ S „m,, ~ FL A. .~.A.~~~~ PRI E..~~ ~ ~ a . 102 SOIL SZ'iRVEY T.~nr.s 7.-Inter•prec¢tiolti oj erigiliee?•irf SuttaoiLtv- 4ource of- ~ Soil ieattires affec-_:ag- I ~ i 3oiI 5eries or tvne, F:u Iu poud- 1nd IIlap .t`II1DOIn Ton=o~1 ! Sand ~ ,rs~•el ~ I{oad fiil i Hi;nn•a%• loc. cion ~ Dikc. or :e~•ees ' i PC?C[v011 .ICC:: Dpeigie (SoE)_____; ~01 suit- ":nt -uit- Pair_____ Slieht to higlt suscep- Moderate ::_ail- \Iocterare pcr- • sb1e abte. , nbilitv Lo tro_t E itc; iniper--:ou~ mr:intill V. i I actiou; moderacc ~ tCllf?Il CO1::- ~ perme:ibility; Inw ' pacted; :c-v sitrbii:--o•ell -nr;nk--«•-~ putencial. .wtenti:il. :pokane ~SeC i c\oz sIi:t- -tut- ; Gooc? ; :'lich: ;u:ccptibilitv to t Lo«- =t.^.bilir-• \fuc'.i•i.:tc to SpD, SrL. Srt. 1bL_. I frost acuoii: :uod- ~ sem~orr~:t•._ r~ r.ipxcf prr- parc of --sC. ' I erate to :apid unpen•iou= :ncabictv S-:C. s .c ~ permeabitit~ ;!oa• ' n•ticn con:- aiid -IuE~ shrini:-aa•e!t ~ pacted, !c- i [)UCe!1C11l. 9 -Il[flll:-,-_ ~ . h0[EIl[13l. t ~ f ' . ~ . ~ i ' t . ~ i ~ _ • * : rined~1 ~ 13k.5j,.E) ; _~';iod=:: errgoo~co~en, ~z pi perm~ `uhiLc~t~"`mi- t ne- ~hnnb--"4 ~ pet~-io ~r--ezi ";well po'tentitii`°.p 2om ac • lo}~' ' s .nh`~"'~nl:-"s~ell^~,j . ' potenLial~- ~ 1 I ~ ~ . I ~ Tekoa ( i e2. i eC, i Fa_ _'NOC Slltt- NJC SLlli- , Fair_____I Moderate to :iigh sus- N-IoderaEc scaa:iitj•. Moderate to 1 2D, na!'L Of " I aole =ble. cepubiliN• co :rosc semioerVioUS :o rspi<l pcrme- TkD) aetion; moderate co imnerVioiL: sbilicy. -spict perineaUiiit.•; wtien comoact- ; i • ~ lo« slirink-:n-ell ed; lon- snr_~- , ; poce:it:al. sR-ell pocen-_`sl o ~ ; . ~ Chli; {llhA, Uh6, Goo-i_i ~ut .uit- • 1ot suit- ~ Fair_____` Moderate to ~-err high \Ioderate stabil- ~[odci•arc i~er- UmC, part of I able. ~ sble. susceoEibility to it}•; semtp~=ous mcal~ili~}•. Cn6 and CoB). frost sciion; mod- to imperviors i ~ erate permesbtlitr; n•lien com- i lon- to moderate pncced; loxr :o , j shnnk-snell materaie shr.nk- I potencial. swell potendal. ! Vassar silt lonm Fair co \ot :uit- I Nut suit- Fair_\foderate to very high \Iodcrate stabil- Moderate to ; (VaC. VaD, purt poor. able. ~ able. suscepcibitity co ity: semigen:ous moderatel. ~ of Vs D). frost sctioa; mod- to imper~•ious , rapul ~~erme- • t erace to moderateiv n•hen com- abilic%•. • ; rapid permeabilih:: pacted; loic -o ' ' lom to moderate moc!crate scr.n.l•- f shrinb-sn•el! sn•c!l potenciaL i I pocential. i ~ 1 I ' See iootnofe at cnd o[ tabie. 7 SPOS-E COL"\'TY, W.ASHINGTON 103 properties oJ soils-Continued . I ; oil `escures affPCCin; Coutinued ~ F.lrm ponds- , C_oncinucd : :1;nculhiral • Terraces .ind ; vcn~aec dispos:il ~ dram.ige Irrigation i dn•ersions «'ster~~•s}•s i nelds Trlr~ic~i~~lit;• ~ r.nibanl:meuc I , LoNv shear ;trengtli; Moderate per- Moderate !o- 'Moderste re- _l[odersce resut- Moderate per- ~oR shesr impervious ~vhen ~ mesoilit}•. r.1ke rste: sutance to ance to erosion; aneauility, strength, i comQaeced; slight ; high water- eroc-ion; high n•acer- liigii R•acer- moderate I comQre_sibilir}-; ~ holding moderste holding capac- hoiding load-carrying i modersce ~ capacit}•. permeabilitv. ity; vegecauon C9D.lCIG}'. CaP9Cltv; ;cabilicN- , I dif~eult to ~oderlce establish. perme:ibilicv. Low _iie.er strengtti. ` Moderate to ~ \Iodersce Eo ~ Moderate re- \fodei•;ice restst- \fuderace .o _:,n- shear i =e«iiper.•eo~is to , rsotci per- I rapid mca~_ ; .istauce to ance to erosion: rnpid oer- ;zrength: ni-h ' mipei•v_ous 'xiien mesbuity. race: mod- ~ erosion; ruod- moderme to lo%v ~ ineabili<<•; !oad-c.irr}•itig ' comn:icted. ~ er:i[e [o Io^- . erace co rapid n•arer-hotding I11UC1@C:SCB IO I i watei•-hold'.=; permeabilicy. esp:iein-, ve;e- , lon• ~-:cer- =:odersre co ~ cap.icit%•. ~ i ca[ion dit~ic;ilt ' holdtug -aoid oer- I to establisn I cap:icic}•. ::eabilitv. i ~ escepE oii ireas i of ~po6sne , , • , lonui, where it ' . i is [airl~• aasx• to j est.iblish alid ~ • ; n here wster- ; ~ . j n•ays are likely i • to be needed. - I to lon- ~.Rapid:io x•err shear.? ~ Higshear,+strength. , RupidFto-vrery Raffi.v a e~ \Ioderste to;low Moderate '~``x2o''`e~,~~,~ipz~~to : rspid perme- imoder- re~tsn to- ~ resistu~ to ` (`~-rspi.i.p"~'~e "rme'~"'°~ ~-c•renSth; high pe'rvZOUS :lbility:~,`- - a loc~ e-son; r5pid er~o ; moder~ abilit~~ ~ ocler-, . l -eosdarr.yin ~ 'compsc-ed- R ster=fiol 'ai1 ...z oto rer.r prid~ ate lo~ R=a''~er-~ ut to lo~c W_s•gucity; r ~ siiatt coui ressi- , w'cspa"'~~.'►` permebili holdin~ esp~ute -hotdiug , .ov~,~rapl ~ • I re~zeta'tion fairly i o era~e cspucitr: ~ertneubility. I to~2iErwnbilicr. auWt o esta6lish, ; ~ i ,,d~epe nding on ~ I cobblestoue content. , I ' Low stren~*th. \foclersce co , .lloderate to _lioclera,e to lon . Moderare to low i Moderate _o =_)R' _hear ' ~emitxi•~-tous zo rapid pec•me- =tow isits'se re:iscance to ~ resistauce eo ~ rapid perme- ;.-en gth; ; :uiperv!ous «•i:eu abiLty. ' rate; :nod?-- eroSion: mod- ; eroz-ion: moder- ni»lirr• mod- zioder:tte load- ! coinpac:ed; ' sce w: ter- ersce to rapid ate «-ater- ~ e:•s;c n:ater- ~.=n•vinq ~ n1eCtlli[ll COtilDCC55- ' j10ICIll1g C.^.- nfl'IIleBhllitf. 110I(jttlg C:Ip1C- , hJlUitlg CP.- CU'DACSLt , mod- j inilitv• uiocler- : pac:t}•. ~ !tv: ve;etstion • p1c:r: -r: te to rspict . ice s~ :bilit~• f;iirlr ?,is}• to ~rmeao~licv I . i estll~li:h where I ~vacerwa%•s sre , I !ikei.• - oe , ' neerjor(,o ~ Lu«• ;he.ir ,u•cnqqtii: \Iodcrate i \fodecace ro I\fodcrace Co low ~ Moderate to !on• iMode:a.e ",--t- 10w shc:u• ~eni1per~•ioiis to permelbiiit}~. ' tlo~~• intske I resi;tsuce to resistaiice to permeiblit~-. _.ren~ h ; tIupervtons «-hen ~ ratc, lu;h ;o ' croSion: mod- eroeion hish to i hi_h :o verr :ioderate ro ` couip,icted: ven• hi;n erate perme- ven- hi3n ~ hr_!i n•arer- ion- load- I mediitni eomprnss- ~ n-acer-holdi=; abilicc. w1ter-iiotcling ~ holdin, ~arry1 ng lbilitv low ~ capacitr. capacitr; vege- c.tnacicv. rsnscic~•; st:~bili~.•. ~ tation evc to mode:ate ~ estnblish. , Dermeabilitp. Moderate sliear E\[oderate to Moderate intase '-Moderste Moderate resist- ~Ioctera,e to i\Ioderate shesr streu;th: senu- ~ modcr:ttely rate; moder- resistsnce to snce to erosion; ~ moderztely ~ scrength; ~ per~-io~u ~l~en ~ bili~rm~ hate olding e1- eersion; rste to ~lod- 1 olclin~ t cspacer ~ nbPlitr~ od- ~ mone n'e load- ~ compscted, i capacitp. moderately it}•; ~~egetation erace :~-ater- i capacit}~: ~ mediucu compress- 1 rapid perme- easv to estsb- holding • tioderatc to t ibilitv: low i abilitv. lisii where c:►pacitr. ~ moderatcly ~ !it:tUility. Rstcrn•ays sre :ap~d likelv to be ~ l prrmesbility. needed. s y VALLEY PINES svBDIvISrON Roa,D SEcTrON IN~ORMAT~~N NoVEMBER 23, 19s~~ RAHN ENGINEERING, INC. 8623 N. DTVISIC]N, SUIT'E B SPOICANE, WA 9920$ (509) 467-1550 ~ Residentiai Streets ~ . Svii Type Per Lfnifed 5ai1 Private Raads Lflcal Access 5treets Classsficatiora System , (usC) GW f 2 inches16 inches ~2 inchesl6 inches 2 incheslfi inches 1 _ ~ f 2 incheslfi inches ~ ~i . ~ GC 2 inchesl7 inches ~ 3inehesJ6 inches e SW ~ 2 anchesl6 inches ~ 2 inchesT7 inches SP ~2 inchesl6 inches ~ 2 inches18 inches SM ~ 2 inchesl7 inches ~ 3 iracheslF inches sG ~ Pavement Design Needed ~ ML ~ 3 incheslF inches 14 tnchesl6 inches { CL i Favement Design Needed ~ QL ~ 4 inches17 inches 15 inchesf8 inches ~ MH, f]H. Pt N Pavement ❑esign Needed ~ NOfE'S: a} Vakues listed denvte asphalt aver crushed rvck (min+mum campacted thiclcness) {e.g, "2 anchesl6 inches" dena#es 2 inches vf asphalt pa►remenf aver fi inches of erushed rack} b} Vaiues were Catcu12ted usang the flexible pavement des':gn method by AASHTO, 1993; and assuming traffic Ivads far reside ntia l-ty,pe neighhvrhaads. A20-yr- design life was us+ed. c} A rninimum of 2 incheslG inches structural pavement sec#ion was used in the table. d] When muitipie sail ciassifcativns are encountered belgw the plarrned raad subgrade, if the higher-strength svi6 is at least 2 ft. in depth anc# is abaVe the lawer- streragth svii, then the structuraf pav+ernent sectivn applicable ta the higher strengdh 5oii can be used ❑niy far saii types GW thraugh SM. e) Far svii types CW thraugh SM, the upper #wo feet af roadway subgrade shail be compacted to 95 percent of #he maximum dry density, based an #he AASHTO i- 1 SD tes# procedure. f} Tv use this tabYe the Eng+neer shall acquire soil samples at the pevject site ancf ciassifyr the saiis encauntered, in accarc#ance with sampiing requirements listed in Technica! Fiefierence B. STRuGTURAL 'FCOA'Q SECTIONa F(]R RESiDENTIAL STREE3S Pb11EMENT DESIGN ALTERNATE TABLE 3.'t6. ~ 5pakane Caunty Standards Page 29 April 1999 • vi~ L- • f y ~ sa~lt ~ i1 •~,~j ~ $~r.5_~a~ 5 ~ y ~ '~41 ~ q"~1'ti ' a t ~ ~r ~~t 1• S A i .~,f ~ ~ ,i - +A ~ • ~~3 ~ - ~ . 1~ ::9:~ ~r 9~ I,~.i~.~4r ' 1 ~ ~.l~ar~f• ~:i ~ e ~ ~ 1 r~N~f ~I ~ ~Y• ~ i .~~.s,~p*~1 ~DY~ a Ja ~ '~F ~`]~j'~''.~7 , • s~ ' 'l~"'~r "r' ~ ~ ~y I~ i ' + rr ~~ri ~ ~ ~ g~ #~b ~E~' 4~ ' ~S I~ , a ~F~ i 1 ,1:" 'k [1 r~ L ~ ~ 1 ~ x~~,i~ ~n -'7~ ~ ~ w~~, . • { fJ ~c~• ~ i 'F~ , ~ ~F ,{Yr , o s~,~ ~ ~ ; - ~ ~ lJ1) ~r 1 y t w~' L s, i ' G 2~ °l. , L# .kS~r ; ~ ~ ~ ' ~n,~ ..r ` ~ ~ i ; y ~ ! +Fq~~~ ; A * ..ys Y 11 r~ + d < ~,~y < a ~ ' ~ ~ . f~~ 1~_ ~ - • 'ik: ALaia 1~ • r:i~. ~ T ~ = i ~ "t ` ~~f! j{ ' ~ ~ f`~--~ r, ~E E `I1 ' + ` ~ tl „ ~ t '~'~r ~ F ~ qp ~`ia~YL', "I r • ~,<,.~1A`. {f ~ ~r } ~A_'~ ~~i ~ ; ` - 5~• I ~rnr -1 ~ - i~e ~ y~.,~,~ ' . ~~i ` • I ~ ~ ! - r~ i ' "r t~ , ' ~ '~~f~' ~ ~ •s~ ~ i ' r* r~ ,t~ ~ ~ + ~ ~ ' •g , ' ~ , P. ~ : . ~ ~ ~ • Orn. 'e' ~i.r rirvvR ! r-~ i i ~ ~"x•~ .p~ ~i~[Ylll ~h~ ~ r:rntrrrnr ' ~ q ~r ! ~ a . ~ ; _ . f. 1 i : _ ' ti • ~ + 'I ~i' ~ ~ ~ ~ ~ q ~ e' ~ ' ~.'~rr A ~ yy;s• ~ ~t a~ ~L :~~-'~F , ' ~ ~ . " • ~ ~ V) : d ~r 6.~ ~ ~ ~ ~ ► m nc:' ~ ~ • ` ~ ~ 1 ' 3~; ~{'S~ , , ~ ~ ' ~ ~ ~ ~ ~ t ~y[,'y. tt f r F ~ C~lfl~ . W ' ` ■ ~ ~ ~ . •r. l f ~ ~ ,A'~ ~ ~ ~ ~ ~ s ~it• VxY 7 R ! { ~i y f ~ 1~~• '48 Q- f~ ~ ' ~1}l'• i.4 ~571` t ~ + ~ ,1 :1'.il~~•~4 ~ ~:1 , . 'J E.~ ~ ~ ~ ~r,~~~l~•°~ t4~'{ §lfa S Nfy ~y ~ -~H ^t ~ " ~ . ~ j ' ~yiP i 1 T _q• / =S + ~ it~ fo ~A l 3 4~. FL.e~ - ~.I ~ ~ • ' ~ , ~ ~ - ~ : _ , 'i QmB . , - t gPf,' •~y~ ` ^ ,L, ~l. . '~1 , ~K a ~ ~ , ~ " • . 8~~~'~ , ~r' ~t # ~ ~jR = •Cdt@ t~`!' il~. ~ » " . . ' ( ~ Ytl GmA 1{~ ' ~I T3;. ' M 1 ~ ; ' . ,lC: cu ti ~ + EI ~d}''~e s 1.~.- ' VIC / , I1C4I[•1' . ` ~ [ ' V • qR~ I t ~'•f ~ ~ r~ Sx13 • ~J ~ f ~~ny i , ~ sxn , ~ . . , . • 34 g~~~ I~51~' ~~~~~"i~ i, i',~'~ ~ e' ~ F i~~~ ~ r`•~'rHF1!'1 '~rD r • . a ~ , ~ qt~~ ~ ~ A ~ : ~ ~ ~Yi: , ' Y_;. ; i ~ w {Y a~'r~ ' "y'j ,E~F 1 ' • ` S af~~~~~ f e A ; i: f ` ` , ' • ` ~ ~ ~l~ ~ ~ ~ ~ ~3C ~ ~ ~ ~ 1 , r • ~ skJ.r^~ ' ~ `F:i..' y.r 7 e` ~ y ~ i ~M~, ,-[~,tia ~ „:l .i ~ L , ,l.r~ ' i ' ~ , . ~;,s,~_ Ii\ ti a~'%:"{s~ s ~ f ~ Y1 ' . , + . w:~. W `J~{,~ 36• 's aOrL sUtvEY ' unii ti Te-?; wavdlsind _roup not in a range site. Spts- tera-tces and I-Iacial rico(l piaiiis iiear Lolbcrt .Lnd Mzai- kane taam-:apabilitz° uiuc L~~e-4. wr3odlandgroup 6; izoi ta,roy in tlie centr.Ll p:irt or ~pukane Counte. _llasi :lnpes zn a ra.nze size) ~fe_~+8 - S~rok~►~ are 6eL.veen ?and 10 PercenG; .ti ien• are vteepe;• r) i•e- Spokane compleY, ;a to "a 0 percent slo pes {SsE}.-F~om sencacavepronTe: 60 tm 70 peI'CeI1C Of •LI11S ~:nmpIex IS 1tlfldePiLCe1y Sltallbw 0 tv ;inc~ses. verv iiar~s graqiaF1-hrown, rery fr::ii~Ec ZraVe11y tipokaate lo.trrl; from 13 to 23 perCet1G 1S :Spofcane IGatn tliaL cvarse sandy ?oam; 5ranular 5eructure; neutral 1111diacurbed lytiS zi siope t`a.aige oT Sl) Cr~ 5.5 pereeliG: tlie rQsG eotl5tSL5 of aseas hure an aa-,anie maz 1 Ench ehtclt on the s,aeP:irL~. Mpscow soi1s ibnd at1ier 7pnILane 4oi1s. Tha morleratelY• = en 12 snehe,, dark-browu. rr:aale g-ravelly caarse s.tntls ioam , slighciy acid, mecliua~ .ici~d beiow ,1epx1~ -a2 [i iuchea s~1a110~~ Upo~iatY9 Z[3-7171 I1:LS .L StlrT7Ce l.l,ref ;ti t]r 4 a11Cl1ea i= [u 24 nnChe3. kdari: Sellowish-bromri grarelds 1u:1lvF - oalsse thanner than thai at Spokane dnitim, 0 to .30 percent slopQti. sana ~$I1bhL1y 1i'1d. anc€ zs ?a ta 30 inches deep ta bedrock. Si=rrace ri-taiod as 24 iacbes ;ra,-eily cvarse sand rapid or wery sapicl, and the hazzrd of erosi4n is tiery The color ot the surface iaver Es verv dark~'P:it'1W2~ ~)L'o~S"I] se►~ere. to vet~v clark t~rawn. Tl~e subsoil ran~es trorn ~iarI: bron~n T~zis comples is tiwecl :~s ~vran~ilanc~, an~; foc 1iJnitecl gr;~z- to d~,rk vell~s~vlsli bro~-n in colar ancl txnm ~rareli~• ~an~~.❑ zng. {~Ls a Complex: Lzpabilitv unat VIre-1. Sv cam- joam to ~'ravelPy loarni c~aarse san~l 111 LE`.ItIiPL'. LrCR1"L1IV ponents : 5pvkane foam. mor~eratelv sIi:~lla~r~--c:~pabiIi~,~• coarse san~l is at a zieptiz ok ?0 co :~~i inclres. T.i areas unit VIIe-1; ~coot~Ianti grou~~ a: izc~'t in :G 1'ZI1~0 site. cohblestones occur z~~i•oLtgIloat e~ie ~rofile. _Ls natieli as 1+~ Spokane loain---~:cti~aabllita• ttiiF~ ~~le-?; ~coo~i1.►a~~~ ~rot~p percent af sorne ,yre:~s cQnstjis ot niher Spr1nr7d.i1~; =~~iIs: .5 fi : nat ~n a, ranze siie} a - -~:a~ " ' ~poicane ~ery rn~ky ~omp e~c, 0 ta ~4 ~ere~a~t sIapes E~ercenc oz I3~~n~zer ;'r:~vellE- ~~it Ioaa~~; ~an~i a~~e~•cet~c o- Glav°ton _Zandr lo,tm._ . (5tC}.-Faom 50 to S{] percexir. of this mappin5 unit is Tlits sail is =rinewhat excessivelv drainer3 and ?aas rnoclerately shallow Spokane 10s11n; clae resc consisrs o'r mvderaretv rapirl permeability. It lsolrls less tihaii lnches ~aranite rocl~ outcrops ~.i~d ot l.Tascow sails 4r oeher 4p0- af tva,ter ciizic plaaxcs ean use. It is law in 'rerczlicv In I~Ane soils. These sflils rr,il.e iip 13 percent af same 2rezis. a Qnaral, it as ertisv cQ zrark. Raocs ot most plaalcs pez~.eci•ate (As a camptex: cap ~.~aility unit ~~Is-~. Bv com~o- ~].dy , a ferc inches :nzo the ;r:a.re11v coarse aand. Surflre nents :Spaknne lQam, mozler-ire1y shnilow-capability riinoff is slaTr, and the liazarci ot erosion is sliszlit. unzc VYe--a; -woodlancl (yroup T. noc zn a ratica Site. Roci: Itost af the ;trre;~ze is usetl qs rroor~la~nc~ .~ir~l ~or ou[crops---capabiIitv uniG Vr7Is-1: nsar, in a waofflarnd Yie1~Z; of fara~e are Is~~-. Less than 10 perceni grcaup or range s'ste~ c.a~.a.,~- is cultivatec~, ancZ anZy a few small tireas are irrzffaied. S pukane very roc'ky ces, 30 tcr 7 0 percent slopes The crops gr onn are alfalf~t and -rass for hav or paseitre. (5tE1.-From 50 to 80 percent of this mapping tuz.it is WhQac ar r~re is ~o~rn durinr rEestz~ilishaneni of aZf:LJfa mQCieratelc• shallo~v ,~p~ak:~ne lo~,m. ~'l~e rest consists of and ;r~s. Le~aunes respgnd co sulfur an~l s~ame'times to grar~ita rock o►.itcrops. baron. {C~.p~.E~i.~itv unit ~`Te-2; wnvcll~.nd group 17; not T1~e :~cre~,~Q is user~ for tirnber an~~ far ~razui-. ~`Iie Tn % range siCe} uWe csf tractOrs far lv~in~ is Pimited. (As cvzaa.ples : Springdale gravelly Ivaanp sand, 30 ta '7Q percent capabiliiv unit ~,"~Ys-• .$'y companents: Spokane soil s1QPes iSzEl.-~Tl~is sail is rnode~cel-s ext~itie on cerrace ap~bi~itF ~ii ~r~~e-1: ~-oasll~.nc~ ~~ot~p t: not in a bre:ils an~3 colluria,l slopes aPong ma]€rr drainagezrn~-s in r:~nge sxte. Reaek ouicrops--rzpalailie;~~ uni~ ~zI~1; noc tdxe eentral parc of the eounty. Representative profile : ~ondl:~nc~ Praup or ran~e site} Sj~01i~,tl@ eYtT'Cmely rOCky Ca i0!C, ~,?Dwtn~rf] ~ per~C~ra""'441~ ta 11 inches. ciart;-bro-u gmreily Ioum9 sand: ueutral: g7an- 51opeS (Su~} -FroIx1 io 5l7 pe~.-ee~.t c~# [1i19 mappirT,o' ~iiaiL 11 ular 5trurCUre ancl sligh[ly darker Lti7dGr in u~]pSZ' u inehes. i5 a mvc3era,tel~ s~~:til]d~v Spok:~ne loattl t~~;~t h.1s a ~ s10pka 17 anches. brs~ n~s ~rav~ilp Foamy sn~sd ~ te~v d~rl~•~rv~s~ e and reddish-brown matties , neutral. ransye s3f :30 t0 yi Q p0t'c0nt. Tlae rest consiscs of rock out. Ii ta 80 inches 4ro►vn Fesy graFellq coarse sumd ; neutral. craps. Tha acreaye is use~l tor tpmber 1r~t€ far ~ aaing. T1~e texture 4f the surface Ia~-er ranzes froin rravellv acomplex: capabiliGr unit GIIs-2 B~ compo- lc~amy s:~n~~ to ara~-ell~s~ or cabblv sanri,- Tlie -r~.rel cs~n- nents: Spokane soil-lp~~b3licy unii ~~ITe-1; Wovdlaaicl tent of tlle -ub~isil z-an~es frvm 46 to 91) perrcenc: =Ls miicia grc~tap 7: not in t~an~e -ite. Itacl~ ataterops-caPqtiiiicy ;~,1~7 pez•ceii G or sotiie a i-ea~ consfs'ts c~t ~Inri~le Ia.~Tn~- co.~.i~a ~~n'st ~'TIls-1; ncrt in woQzZlind --roup or rarn~e sace) sanc~, 13 t~r •30 perceaat sPopeW, ancl of nclter Spein_rltiiie ~~+~1:. ~ TlLis soil aa same~~-liat es4eEsive1❑ drainecZ -incl his nnad- SpringdaIe Se11e5 erateIy rapid perrraeabiiity Xt lialds less tlaa.n .5 inciies ot zv;tier that plants ran Liwe. Tlie fertality is Iow. Root pene- TF1e Sprinaclale series cansists nf samewlint eticesszveIc. tz;ztion rs deep. Tlze u=e of macliinerv zs clifficu1t. ; urface drained, ccttrse testured and moderateiv coarse testured, runoff is s1aw fO rnecliLini, anci tl~e 'laazard of erosion is ~z-3ne1~ anel cobbly soils. T?~?se svils -i~vrmecl in gTacaal siiglit ta moder:~te. ~ otitwaTs~ mixea ivitP~ snr~e rolcanic ~h, untPer panclerosa 'Chis sail is useci is a sotirce vf a tiel for concrete. Tlievs pine and ¢rass. Tl~ey are nearlv level to verv stcep sr~ils is some ~zing on 'the less sloping az~eas, biit vieIe~s of ora vutwas~h tarraces and [lood pIa.ins. Thie :tnntiial pre- fomge are Iaw. {Capa6llity unit VIIs-I; ~aorlland clpitation is 15 to 19 inches, and tha frnst•free season is grrnu 19; not in a c:erizeszte] abvut 140 clays. ~pr,ing~raxe - Soils nf the Sprirzcdale series ars usetl fnr a1fa1fa, d ass, slopes [S~_'~ia'so~r~ a~r•f~ Is, 1~~~~~ie"~".~ and ~rain. They :~~•e :~lGo iise~l far gr:~zing and as daTa ~vell:~ suns~~ l~s~,rn i1~ w aa cl ~and. ~re~t ~lop#es; an ' p t . ~ ~ ~ob ton~ Springdale gravelly sandy loam, 0 to 20 percen# i~xo 3~ inches, so'x+~ ~c es r~~ slrspes (SWB).-This is tha damanant saii ❑n the outwash w~t~r M_ Iants cd~~~s$. ~ mu_c~.~as~„_ l~~Aar~cen a sorne ~ ~ ' SPOKANF' CO~, WrISIUNGTCiY 37 other d€~ie ~als~•a~ rnncI iw~:'~'ekaa grav~elly silt loam, ?i~ to 3i} percent siapes Eied ~F~ny~rt7"sq~ {TeCI.--Thts_ aavelly sail has mediurtx ta rapid sttrf-Lee r as~~asedfar g sartie '`araps~=ri~`Spt~are rttnot~ ;~n~t ti maderaze to 5evere hazar~l of ernsion. Ai~out 0`t~20~perc~M*slop °wi b~t-pr~t~cesj 3 pereent ❑f some areas cansists of BernhalP a,za~1 Schu- ~ • ~~s. ~~i~pa~ai~~L~r'~ii,t~£~'~;`~~a~ic~;~nu macher soils. - xr si~e-'~ - -"-~...~.;~•:^-a~:''r~~ ' This sail is used primarlly for tamber prvduction. Sm~,TI -7"7ring a e cv y san a , ;TU gercent siopes areas are saecled ta srnall ,-raan or ca -rass ancl le-uines tar [SyBl.-This soi$ cantiins gravel and cabblestones aG a hay or pasture. (C:zpahility unit Vfa~a; tivoodIand graup depth of ?fl to :36 inches. As rnuch as 10 percent «f some nat in a razage site) ~ Roc.k.. `!rcsro ~ ~,re~,s cansis~ of ather S~Sringdale svils. Tekna r~e~ roc!c y cample:~, 25 to ~ ~ae~cent 1opes This soil is used as ~v~od~and aaxc~ fQr grazi.ng. (Gapa- (TkD).-From 20 to 50 percent of this mapping unic con- bilitp unit Ms--1; waadland group ii ;not in a range sists o# stindszone outcrops; che rest rs a, Tekoa ~ravell;~ site} si1t loam that has a, s1ope ~nge vf 36 to ;ia percent. Ths acrea ge is used f❑r gr aaing. {As a complex: capabiEty TekOa Ser1e5 tinit VIIs-2. Bv c4znpanenrs: Tekoa sotl-capabalitv uaiit VIe-?~;~oocllati~l ~ oup not in ti range site. T~ac~ out- he '~e&aa seri~ consIsts of well-dr~.ined, gravellP, cropsa~ability unzt V~I'Ts-1; not in a, waorlIaa~t1 group `'medium-te~nred scsils. ''liese soi3s forsned underconifers ❑r range si#e} ana o°rasses ita weat,hered Gane~scone, r~uartzite, schist, and shal~. Thev occupy ~enCTy slonin- toyere sreep liill~ ~.n~. ~J'~i; Ser1e5 travuntaisiQLas tireas. Tlie ~,r~r~~i~I -reciplracian is a6auc 22 inches, and the frasc-free season is abouti 120 davs. The soils of tkte Uhli~ serzes are ~1ar1~ caIvre~I, ti-~11 Tekaa soils zre ttsec~' for ~ atiang, as ~voocllItar~. an~I as drainer~, an~T me~lium texeured. They ~.re ver~ deep f pr `vildl~e habitats. fe►v sma11 axefls are usecl for ~-r~,in. the most p~.rt, bnc heelxocl~ is a clepcl~ of ~0 co 40 inches ~ ass. and 1e2~umes. zn some piaces. Tliese soils faxmed uncler ~cs in glacial ~'ekoa gravelly silt lrsam, ~1 tQ 53 percent sls~pes rill mixed ua. c4xe upper p;~rt ~ritli loess a.n~d volc:Lnic ash. fi'eDp.-sThis soil accurs on Tekaa Nlounta.in a.nd simiIar They occu vaerltlv ydaping to modera.telv steep upla,nc3s. prQmontories in [he countv. MQSt slopes are between 30 The aruiu~Fgrecipitatlan is 15 ta 21 inches. The fro5t-free arad 43 percent, RepreEenLiive profaie: _ veasvn is about 140 days. 0 to 14 fnches. dark-brosvu, trtnbie gravel3g slIt loarn, granular TJ-lil SAils are uw2d fOi' , gr:tin, peas. len tIlS, ;r3sS; ~~falfil, in the ngper ' incbes ; nentral, gr,cdlag to sllghtiy acid below Fe ~e tA~3 es. r~rCba~'t~ frui'IS. a deptn of s ~ebes; tSndls[tlrbed AreaS hnve an prgaunic a~at ~]hlig silt 1oam, 5 to 20 peacent slopes (l1hB).-This :s 1 inch thiek on the sArPaee. ti1e domizlatlt soil on Feoane. Qrchhard, a,ad Pleasanc Pra.i- 14 to 24 inrhes, darir•brvwn, friable graveily heavy szlt IaAm rie5 1xf $hE CenCral part of zhe eouuL ,w~Sich t~ecelces tC+ that hreaks intv grie~s 1 ta ? inches wide and then fncu ~ angular 61oc1s ?j to % inch Evide; mer3ium acPd. 11 lIrchBS of ra.irifall annuallv. Ic 1Isa occurs on the glaciaT 20 tA 38 inches. Yellowfsh-brown ver~ ~~veUy toam; massive outveasIa plain iai ihe western ancl snuthwestezn parts of or ane€y taminarea; meatum aeFd. tlie county, w}]PCh TeCB1Fe 15 tC7 IS Pd1CheS of I'z4i11fa11. MosG ss inches €racturea sanastone. slapes are between 6 a.nd 10 percent; a few zre rceeper. The caPur of tha surfacB layer is brown nr dark brown. Represen'tativg prol'le : The texture ❑f the subsQil as ~ravellv ioam or grave~y 0 to 4 iact~es, bluctc, verq Prittbie siit loum; a anuPar skrnctuse, silt lc~am. ~'raciured parent rock oecurs at a depth of 24 medium aesd. t+~ 40 inches. M mach as Spercent or some areas consists 4 ra Ys inches, Fer9 dark a ar, oer,v Priable silk 1oum abave a of Bet'11h11l atld SCl]urrlaC$er soa1S, depth of 10 inehes ; brenks into plates M4 tn 3§ inch thick; This sail zs well dxzined and mvc3erately pes°meable. zt sligntiy acia ; oery dar~ brown, vQrF grtaeie siflt aoarn belc,w hal~ls 5 to r inches of ~vater that lancs ca,n uG~e. The ~fer- a depr,ti at 10 iach~s: seucra~. p 18 to 42 inches, darL-6rown, iirm 1oa.m, friable helon• .i ,lepth of ti1ity is Pow. Raflts penetraie ta che santls&one. Surfnce 32 imches; breaks inco suUa~guzar bFocks 1~ co i inrh wicze, x•unaff xs ra id, ar~r1 the 9iazard of erosion is severe. neucrzi. tiE O[1£ of t~15 5011 IS CL3IGIvated. It E3 UwgCl f0r t1It]beP7 fOr 4; tQ 68 inche4, broevn, cery Prisble rery tlne ;.in41c loam . gr:szing, and bp w#Itllife, (Capabilityp unzt VIe-?, waod- rieutrai. fand graug i rnoc in a ran;;e sita) Tlae color of the surtace layer ranaes fram b1acl- ta vei-Y TekOa gravelly silt loazn, 3 to `?U percent slopes dark brown. Tlie texttire the sAsoil ranges frorn iilt {fieBl.-Tlxe surfaea Ta er of th~is soil as li'tt~Ie thicker than loam ~ vee,y Fs~ae san~l~+ koam. Li~ne occurs in places be2o`v th~,t of Te~oa or~.vel~y sait loatn, 30 to aa percent slopes. a depth of 36 inches. Tm some areas as rnuclz as 15 percent Surface runoff zs rnedium, and the erosinn hazard is mad- of the suhsoil cousrsts of conrse granite ancl basalt sand, erate. Sur#ace gra~~l hinders cultivation in.sQme places. gravel, and afew evbbles[ones. Ln piaces agTire11y and As rnuch as 3 percent of soane areas consists o# Bexnhill sanrly layer is prevent at adepth of 36 to 48 inches. -ks and Schuznacher soils. much as 10 percent of same 1rea.s consists of Bernliill, Thzs soil is ufied mainlp far timber and ~r~.xing. A fe~sv C1~er~ey, 7no~v, an~i k~esseltine sflils. small areas ~.re used for sma.11 ~ a1~ AI1L~ AZfalfILy or are This sait is well drained arad moderately petmeabPe. It seedea to grass and Iegumes for pasture orr haq.=- Yields liolds 7 to 11 inches of water that pIants can use. The are fair. GraLn ar~d grass crops respond t"o-nitrvgen; •fertitltq is high. Root penetration is very deep. There is 1 egarnes respond t❑ salfur and phaspharus. (Capability no difficulty in the use of farm machznery. Sttrfacc ruaaoff nit IVe-4; woadland b oup r; noL in a range site) is anedium, and the hazard of erosian is moderate. 4a 20 CHAP'f"ER ONE Geotechrucal Psvperne"f 5oi1 ■ T~II,BLE 1.9 iGrouP i+~ames for Coarse-Grarned Soils (Based on ASTM I]-2497) < 15 ►N ll-z~ded arave1 wich sandl~, _ <15 } . . . • 75 ~ Foot1Y gimded gravel 2-15 Pnoly-gmdad arave1 w►th sand ~ Si1tY gravel ~ : ~ • ~ E 15 ~ • " ' , 45 ' slYy' gravel w~th ~ ClayeY gravel . S+~rC eY"°'3'.'y4,' , ~ V F• ~15 ~l `"7 VY~1]L ~d " . M,.. *'r ~.~,.r] ~`Ji1ty Cld' }T` gravel GCrG1Y'": j~ ~S~ ~~Igl VY1Th 58IIt1 z f1VeI1-~ Vel Sviih Silt .f;V~!~ . ;s~~'''Y~ • • - =r Z15 Well•~ ~ 8 wzth s~t and sauc~ r""` ' = P]I-qi:LdEd 8~~ widfi_c1sY . - . • - Vf with c]ay asd sand . ~ - G~1F~! : eil .yls W • • :~;`z~~~'~;';~±~~..~ - tIS- e - Pooiy ~ ,~sgt t arni sand ~[17t:~ ~ ..r~~,. 21~ P[ ~ • • ` 15 Pbar1Y gaded'g" unth c3aY CiP-GG:'• ~~~~;~;'yr ~ c ' is pnarly Wadei ve1 wgh clay and sand Weilgraded mmd ve4 PaoriY ~ded samd ~ ~ Sg sI5 poarlY ~ded sansi v~nt3~ gravel ' ~ i5 ~ ` . e15~:'- Saty sand -15 gilty sand wtih gravel ~ C 157 CIaYeY sand wiEh gravel _ ~y5 ~ay~ 5M.SC: - C 15 5iIt3' d29eY ="d Silty claye9' ~ wsttt gravel ~ 15 - sand with silt SQV~I~+I <15 ' . We~1-V`a~i Well-~asled'~ with silt and gr'a"el z~?~ =~r ' , W~ with c]aY ! ~'`~•v ~ , - . k tj%~==~=-- • 15 '~~~'`,w V~f'dt=~ ~d wiW claaud r, F t15` Poortp zt,15 PoorIY gaded wmd with silt and gravd 15 • '~j , F'9t1~l] ~ ~d W~54~f1 Cl23s 351d gravel clay a lyaGl: ~SarA frac&M Pffmt 4f 9mi Mssing ?ro. 31~ Si~' ~ T¢C31I1~ fH3 R6. R R_, r l~; e~'7L~' ~OI1° ~~[lY ~ 9011 Q&451n5 ~ ~ h ~ 702 svrL s~RVEY ' T,aBr.F i.-In.iea•prettttiwa a~ ep!7iuee)vp. i ~ S uicabilat v- w.ource oC- I sa~l ieatisres affer..n ~ I 3- woil =eaies vr'_rne, ' ~'.uin l~oud~ and riia~ _rninals • ~ ~_,snd ~ +=.rs~.ei ' t?osd 511 1 i3,!; h~•ar fac: z+.on i Dikr_• ar , P,c_ervair :src.: SpeLgle (_o~]-----~ ~'..:.E-----'€ 1nz ~tlit- ::01 ~c:it- F.iar j Sla~lzt ca faia=Y ~E~=cep- ~ iln~fer:ize lfocfc.r:ire l7cr- : :enle .~h.e. ~ ribitLrr to ira=t ~ irr, :nipe=r:pzi: nar.[ iulPr3- ~ f i .1C41!}Ll , i1dOdCP:lCC ' ll fletl Lt7I1:- ' perme.ihilit2-; lus~ ~ Imcted; !c-%- I , :lsrs~ln-c■~-~,[l ~ -mlnk-zn- ' ~7JLL•t3I i.17. i7d] [eIl CI:L]. y]7(5k_311~ ~~c C, fGir.iir_ Nof 3Si:i- =~ii -k1Li- Gil[]d--. ti11l:'Fi =ii=Cl'p[3114114t go I j.USL• •i;;}]ffl`- MUtf( I.:[C io sWc). • ~ClF1lS3L'_l••j,_ il! P.:~1+[! 7F'!- ~ l~t OC ~5~. ~ i ar:t[e :l~ ::h*r]iCS ~ !IliT7~~~ 16l'c :l;i: !]16:t ; Cs""' "C St-' ' ' T3(+*~i1C;E]!~liF ~~(]ll' f 3 R'.ke:l C4M.- .1f3iI ~lfrf. ' ~ ' £ilr[ill'--iI'e:j ' S].SCELi7; it2-r ~ pot~q~t:.rl, t i 1~ ~ S p~~~ct ~Ie ~;.~w 5, I ~~`~°~~-finir~. _ _ _ •~o g~l_ . _ ~ ~'e~,gaat~.l Sliishcn:caacepcif~iiitr ta ~lImr~erfe xa T^i~~i 1_~ icl~tia r~ ~ , 5 z ti ~ ae~ion' ~ i~l ~r~.r~c}-:. ~me- er ~ r [O t'~lpid }]@C171C- ~,j~2 Ct+~'ld4[3 CO L~Y.FZ'~ tAbtlitt" Ia_ Perr ia s~ esz ; teu[fn];° evm~ CT, 7$~- ~ poteuLiul.'. i f f f i TCkOa (I ?B, I ?C. f F.F--- °--I NOI ?ESf[- \OL ilili- Fall'----- ~ MOderaCe C❑ !ilgiY 3ils- 'MOC.2*a[C 3fab,.FtIv -ModL'Y:IFC CO i;~+~} ~'aer ❑r arale „lal~' i i ceptipilati• =iro .sc seniiperlza; ro iapicl pcf~ane- arrava, aaarlesate to imnez•rioiz= ahiflt1% `apid per:nesbiiit;.•, n•aeji comrsact- ~ ' I lo,~- aiarink-:weil ecE; lon• :ih=K- ` } ! ' i pv[e:it:sl. snci! PoEe=Mai ' I ~ j I L`hlig (U h R, U h 3, [aooci- k - - -i -Not 41Yar- ' 'Nol siiit- Fair_ _lIauerafe ro very 3zPgh ]Tcaderate staoil- tlvcIc rare ner- L1mC, gart oi I able, i -iblQ, ~ SuSrepL1bs4tiy tv iei• :emipen-:QSiW tncabi;itc•, Cn8 and Co$a, . frost accivn; mod- to zmperviar.s • E ~ I erate peemeabilite•; n•hen cvm- ioor to mvderace pacted; iarc zo , ~ skuznf:-sweA moc[erate shr.nk- , pvicential. ssre4l Potenaal. ~ ~ Vassar silt [num Facr i❑ 'Nat siait- ~-Nac ;ttst- E'asr_..__ Afaierate to verer tugh IInderste scabil- ~ 1lociera[e t❑ ; (VaC. Vai7, part poar. able ~ able. suseep[ibilitq ca itti•: semiPe.-e:ois. ' morlrk•ate1R- ~ ❑f 'JsD}• . frost action; mvd- to ianpervaaus rapui perane- . ; Qrate to madcratelo• n-hen com- , abilicy. . j r3pid permeabilitv=: pactcd; Iv►v' , ~ 104r to rnaderate nzacleaste scr.n4- ~ ~ shrink-sn•e!1 an•ril aotenti:Ll. ~ ! [sa[entiiui. f ; See loaTnate a¢ eacP af ta6i-. i " . sPoZ-1-NE coU-N-177, W•rTo_X 103 pr'opFrties of soils-Contiuued 'ail _eaLUScs affmung-CanCinued I ~ Farrm nonds- i ~ , Contsnucd , Agncultizrai ~ "CeY*:scUs :ind f ~ vzwace dispan:s[ ' dra~ga~e ~ Ir;:~.^,~iu^ ~ rli~•ersions S`".Ltei;ra}•s E nefcls ~ Erxli7ai1krT3tiit Lvn- shear strength; 1 1Loaer3se per- ~_lfocierate in- .lXocierste re- _lloderaze resisT,- lfaderate per- --on- sbe.ar irnperi-iau.5 n•hers R mesbiliiuy c.1ke rate• su5F.IIace to ~snce to erosion, aneatadits•; _trengsh; coaupacted, slight ; iisgh •,raee:- ervsion, high a•a[er- ki:gn n•aier- moderate ~ eompcessi hiit, c y; a hoiding mocierate holding capac- liflidnng !aad-catr;•ing ~ mvderate ~ capactt}• i permesbility, ity; E•egeta,tian 4a ptc.t. eanaczty; 5t:thiiin-. i ~ C~I~7CllIL Lp motferace , i estaGlish. ~ ~~TT{°l~.l[7S11L~. i ! i.ow =he:r szrei'sgtla, ' ]ioderste to ~ iFaclerase to E Macier.tEe :•e- lLoder.sce resist- _lfacie:me co =~~r she:ir 3 -e:taipert-ioigs t❑ ragid Der- ~ rapid intnk, i Sfsrauee En a.nre w ero:ion. • ragzd, ner- _~-engcn ha Fa ~ lES1i7L~I[-.pll7` v~•lxetl ' nxe.eos~:tv • zace; ~uors- ~ Cl'O-ioCP: 71QC[- Tl'SOf.'~EP:htB to io«• + ~ne.ti~~ilFt~•, !o:~ii-c.ir:~'iY3~ I coiiinaried, ! er,ar~ ca Io:r ' eraze to :'ap1d s►aier-htildin4 , anoderzte ro "apar:rr, ~rac,z:-hoic:_=_ ` ~sermeak~iiitE•, casa.2c:cr; ~•ege- loR• n•scer- =aderare zo f e.an.~ciU}. i caizocz IiFc,dlt hokd,ia; :.+.aid nea•- , j i L6 2:i: C]l15h C«T3:C:F:' :.n@:lbR1PLy , @SCP17t p!1 .'iCe.s oi Spokaiie i0ai11. n-here :i; 1 • ~ ~ 1s F.affl%• e.t!zE• [o : . ; escsbli:h aiid i n•heie n-ater- i n•.rrs are li'seir ~ ro be :ieetiesl ~ =liear stt~engEt~: i LR~pidata~~-erv ~Rapid int,~she ~ llodei:sce.,to;PanI llode~se vcr lan ~ Rapid zo +~°err ~ P~~ ~ e,ax r. , ~i~a~~•iotts oC' i'rapid,perme- rate~rmod,e: s-es,"~~.eaiace to 3 re.ist~nee ~o r:~pid pe.•te~gC~s• W p~ r~~ 4 i. ~ r h eu ~ a tup ° i a l o r r e r v~ any r~, pt d ~ e r a'i o n; m' v der- aby 1 i tt,:Im a d e r-.~ Tp'~" s~_ g ~ ..erl , n•ater-hol 'u*`; tn~~;e'n~ ptd mte tp P❑~c tra#ez- at~ ro lol~r ~~;~~a~it~~rr$pad; af6~3st coaap~e~ss~- , -capaciir. ~ percue~t~ilrtr. ~ 'hrldir~g.,w.~pacitr•; evfer-nald~~3g ro&,•,rapid! ai ~ kaEhr~`: invderace' ~ ~fr~riv ~ capaciir. ?eraneabili~,"~. diPfieu14~ta~'tli,fft- I ~ ~ au3ti zo.eidblish, i ~ sdcpe~nduag on ' I c46k]~eSLOne ca"axter:ti. ; ' Losr si:a :l M•e::, ki _lloclerase to ~ "Jf]uTQl':fC i(] E ML}dL-:li2 LD L6C5- , IIOdeP,^,EC T(7 iDw ~Mi?de'a[e SO ...iz• :i1C_^.P f S2itY1I3e !'c-FOLS3 Yc3 ['1(]lC~ F1£I'IS1L'- ~ :iDR' 111Y:1K@ ~ .'f:i:,L»11Le i.O ~ 1-E~3si..t1iC@ iQ ~ '.'1~1ir1 ~:'"i13L- :i~E1gC:li k :Sill]t':"x•_~[i3 t1•;?eSl abilit;. :ate, ~Mvdc.-- ~ ervslaal. mqci- F ernzion. znouer- abiurs- lzind• =ar3erate ?vzcl- ~ F rvsirpacGed; ; ate n-»TCr- f e-:ee to rapid 1te n•sier- ~ eraze R-:m"- o,ri'y311g ~ oanezlati1ih cviizpir:_- ltmfrlazi; c: - ~ perr.iea~bilit}•, I ! 1►oidifig c:ap:zc- ~a+~l~:ing ca- CepaciL}•, moc- t I~'71i1i~` I111C~C1'- , 7.LC:L~- t I ILc' ti•eP~eTR[1CSI7 ~71C'[; -:_^.[p i0 +aplCF ' a[e _ : [alIi[~-, i f.urir east ta ' ~rme:~qtlir}•, ; csclhls:'ra ~there I ° j n•aEer:rar~ 1 l'e likclr -ahe sseetied. i ~ L.aa~ :[ee.te :t:cn~[ia _llodarite ; 3loclL:aEe ,o ' llocleraie to lan^ iIoder2tn to lvn• ~ _lIorfe-a¢e ; low siaclr -+siiaPpei"loiis to perrneabilac?•, alow inta;:e I ie:t;rance to resi~r.i:ace to ptsaEFie.iblir.• :ereai.~th ; t:aiOer.•iosis Wiicn 1 "9.LC. '!I.-,il ;•3 ' cro:ion• suod- erO.tosi hzQh to ~ 113rh rn ~•~rr mvderatc ra evMmiceed: " ~•err hi:te rrate ;ern1e- ~•en• ~xi~h I ai~~n ~E atei•- .aR• 3a,~d- ' rrardzeiui co:iipres_~ ; n•aEer-ao3diaz ~ :shilitr. n•scer-Iimkr)tng ~ iaoldi.ag eaaTvaaiz ibtisrc-: la%v ; r:tgacitr. cnp3¢:ts, 3•ege= ~ capaclz.• +'zp3cisG•, st;t~ili[.°. I ts[;oa e:u3• to asacieraee € estabiish, ; permeahil`sty. Moclerate slie-tr ElIoderate to .llaclerRLe Fnta;,a 3Toderzte IIOClCraiB I'C515t- IIpdCY3fe to ~_lioderatc shear screiiph: sCnil- madcratelp r;tic; mode*- sesiscance to ance to ero.icsn, r anoderaeely ~ =creagcts, ' perv'raus to im- mpid gerrne- ate iE-:tter- cro:ian, mad- moderate n-ater ' rapid perme- marJeraxe laad- ~ ger~zouz sriien s6iUtp, aio[ding erats to Izvldin, eagac- -ib[Utir, mmd- ' carr}-Ir1,11 ' cqTnpacterl, cap.lciz,r. maderaxeiy it}~; re~ta~ion ersee n•ate:- ~ ez~acit}-, j rne~aii:x~ coanpress- ~ rapid perme- easc to estah- halding moder;ste to ~ bilirl- ivw j ahilstr lish ;rhere capacitr. ~ madea-a.tcly nstern•avs :crc E apid likelc to4e Perme3beiit.- . k neecked. ' ~ ~ DRAINA+GE REP{3R'T FvR VALLEY PINES SUBDIVTSI[]N POR. (]F SE 114, SEC. 21 T25N, R44E,W.M. SFOKANE, WASHINGTC3N Prepared far: LaRay Buflders, L.L.C. 12$10 E. Nora 5uite #C Spakaue, WA 99216 p ° `"-L G, ~ ~ .F• W - ~ F'repared Sy: Hahn Engineering, ine. $623 N. Divisian Street, Suite # B - Spolcane, VVA 99208 (509) 467-1550 ' PRDJECT DESCRHTIUN The praject knawn as "Valley Pines Subdivision" is generally located Sauth and adjacent to Twvelfth AVe, apprvximatley 500 feet to the West of Pines road in the SE 114 quarter vf sectivn 21, T25N, R44E, W.M, Spakane County, Washington, Vafley Pines is situated on approaeirraateiy 11 5 arces which will be subdivided into 371ots for single family dwellings - The svils in the area of this prvject are Springdale graVeRy saridy lvams ( S* B) The Spnngdale sofls are pre- approved in spakane county fQr the use of drywells vpst,b.doc l .sl. . .....iE _ ~ _ 'r- _2 t0s4 ~i ;y ~ t3orrow • • O - 5 I ~ fi Zi' ~ Pit ~ . . .........i~ - , , _ . a - ; aE - f . , . rN1 t."A N D-- E M a ~ F11`9 INeli G~ ~•7 ' - 1~i-~+ - - '_~1_ yf•' ` 2MQ2~ ~ ,L~" - , I , 'g • ~-~,P `.}r:..,. ~ -._.jRt- ~ ~ i ••~1 ~ .i :~i ~ Y~~~A4~ 8arraw . _ ~ _ !N'~.FRNF' .s~ P~z" - t • - , ~ rk- ~ ' 16` lil~![ ~ r~^--L=~llR1 j~dV~T~C7ni`~--~`~_~_-_~.__ ° I ~ - , ~j~~k ' LRNEM . ~ - • ~ ~ _ . a~ - Wn • ~ ~ • _ __a-: • .Ji~•~,-' ~ ' , w ' - NoR T s3 ni!~Park~' ~,1 . , f lT-2=v._ -,~i 4.~ a`-: 2y ~R2f _ -!rf3SrON~.~+~{~'~k $AOkail@VSlIQy . w c •II' ~ yr''~~- , ~ i i~^~• -PAONE y • all A vE"^ Y~ 5~ ~ _ ,r~ ~Ot?' , ~ - • - ~ Ih , . ` ~ j' ~ _ y N ~ ~ ' I ~ ^ . ~ 'rJ , ~~_.i~'r i ~ul ~ a •wT i._ y ; ' 'p , -:~k, ~ ~r k - , ~ `lgE ~y~- - - - • ~ , rt Y ! • E , ~ ;al..= ' ! ; ~ ~ ~tur~ ° 'i 2.,fY 'rp , y~~~~ ' • - ' ~ : . ~ ~ ' 1~; ~ 4 ~:~3 ` ~ ~ }f- ' ~c`+ r~ ~ _ - ~A~.~ ~ S 2Q.36 ~ 1~ I' , ' _ ~~~Y~': ~ ' ~ ' 2 ' Y Vf`; ' ~ f, ni y`= ~a 9 r'- ~•~I~J` ~-7~ P.re¢:r~e ~ ` - •`ar[h Pioee -i ~ If ~l-~._` k ,'F ' 'p . _ • ]r Hi h Seh ~ f~ ~ rt `~y~ . We1{ J T yrh i ~ P ~`y•. - i ~ ` ~-c_ ~~~'t-y'_.- d052 ~ C : ~.,f E~- ;J - , ~ ' _~rry ~.:~~q`~.?;,' _ _ ~ x.. .a~. - "j~~+,:.--•_~'-1k ' , - ; r ' ' - ' , vALL= , . . . • . . . acraa WAY~ f^' " ~ q l •i ~ _ _ . . . ~ . . ~ . . . n { za25f' -S;. 3u6statt' a • ' ~ -f~ ~~py ± . _ - " ' . 1~~~~~~1R i~ lT i1 I''k, ~ ;E... ~ ~ or-~-~~ ~ ~ ~•-i ~ ~ L~[~31E ~~~Q~~~ ~SPRAGUEI -A~ ~pYE S a.aivE . _ w, . ~--n - q~ r ~ .1:~ a - . .~+'J~ .{1 • 1 - A. . . J , _ P Qj-ay .a ti~"a'N~ r:~~. -_'~k :~~`;i~"s j~;',:,. - •~i. ~ ~ o _ ~ •2Prs - • • ' ~ ~ _ •IIABAIYAdNEC7 ■ ~ ~ . ^ _ ? ~ ~c. ?a~' ~~.'{Ty,v'.F.i~• . il.-,`'c"'^:' t TN ..a: . ~J '~.,s'ry"'• - :ch . - . . v ~}'I r aH ~p. _ ~fl~"m~ tm!' -,'r_] ~ : •~.qiVLrN[lE N;:~lOUG r `~-lL w7: ~:T'9i:~~.~Y•'~r"a'e°~ e... , ~ . '4TFf . . . I ~i~l ~ ~ .n^~3`~r4aF~.~y'~ ;;~,y,K~ y y::w , : ~ - - '1~'s.>• ~av-`'i . .~IZCrrc _ ' • . ' - _ . ~ { ` , ' ~~,;~~M:,~~ , ^Y:k 5=F " '~'7~' y ~ C~.gT ,S'~1e l •+:•~;t7~:. ~ .s_'3-_ ti_ ~ 5 . . t ` a• ~,w _ - ` ~ .,..rel~r~ ~r::<r s0i3. f'. : 'ldams . ~ ' _r ~ - =~i ~ . . . .ive.•. ~.r.... s7Ms.~'.e ~~~:r~-• ~r'. ` '-p= ~ ~i~- ~ ` r ~ Y •':~:s ~rw`~1~~.~. ~ ~ ~ a 0~1 - ~ . ~ ~ CHen[rai Calle~ n. .,..n- - a-= - ~ '~L-.2C►b• .t2~~~; . _ _ ' . . . . . : • ~ ~ ,gh $ch ~ , : • ie, a~'~r~~ - ~a C~RO.IECT~ LOCAT[QN a~~= `t • . I~ ~ . ~ ' - . , _ - .277a , - ri•. - - r,G,, . • _ - s~ : ,f~:~~,~- _ . . : , _ . . . . . . r, - .~ri`. ~g''.~t 4~, ~xa _ ~ax.~~;,s~;..~ ` y 'i• • _e . , . . - : . • . ,~r -w= H " ~•~,.~.:E7 - , J ~ `wF'~i...°_~ • . n , e ' T ~ _ - - . . . . ' • ' ' . . , t~ e.a,::S` i . . _ y ~ ~ ~y ~ •`'c r, • i 1E J'~ .':1 . .y: ~ ' ~2f~•'~ - . . . . . . 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W f, ~.~f ~ ~ ~ =aµt~~• ~~'-j-.._i'' \r: i` . `'~o ~ ~ . ~ _ ~_.y:^-,.:-. s~ I~'~iAf ,.~Ky. w _ ~ ' . ,rw ` • . ~ ~ r, e~ aoa ti£~; `Y~:.-_ ~ ~ ~ x~.,~ - y _ . ; ~ - ~1 - - ` ~ ~;,ti. . - r~° ~M ~ FFE7 _r...~„~v,ts~~;`~,~~-''S 1:'~~~~ :8~._ u -~~~r ' - - Rt°"i'~ , , as31: ~ 203n i ir 7r7 i~1i1 `}P__ - . ~~.7- ..f! ~ • L. _ v~~ SOILS ' t ~ (~~yy~ '(i~ .~•~~f ~7 + 1'v L;~, ~ 'E2d`~~ia Yt r'0~ 'F:. M1k~ ~ ~1~ .I ` f1: , iY a t 3; ~JPi.n~~~ f ,7 1 , q~ . j Ci~+~^ • 7 L ~T f~t~' i 1~ , f•~ y j41. 4♦ Y ~ 1• t, i a~0~ 1~~ : i ~:~1': r##~. . . t't !tt ~i, ~F ^t/ ( . ~ f~'7 ` ti~t~;~•)_ '~t' ~~~..~1{,~~~`t~ ~ } Qr .'trauh t~ ~ j' T►,~~'~ ` : jL ~ c 14 ;5' ~~t'~,~~J~:,.+~i . t i 'i ~~I~ ; .r i .5:. . ~ 1. ~ .~ii ~ ~ i,t .i;.t :tlT .r- ti ~ `It~. k~ 1 11 ~C~ 1 ~1~4!a) l! . .~it' ..r, . ~r ~ ~~t . .~.•Ilf , . ' en ~ ~ ~1 ~ 6'~ r+ ~~j~,j f 4'b . ~ ~ 1I?"'`~. ~ ~ r~~ ,~,~~~ry~,} ~ 1 ,`i_,l4 t E, t~ti.•.~t•,r1.'i',~,.'~~~i~ C,~ ~ ~ ~ 10. • a' r` ' ' ":7: Z . T 1 ' ..E'tR ~ 1 ~J' ''S ' ~ •'rf K`~ ~~ti ' . `I ~l ~ I .~~M1~, , j i ! r F.. i~l~ ~l~ { ~ ~ • ~ ~ ~ ~ , ~ ~ ~ • I':- T:S . . , 0. ~ t xw 2 ~ ~ `t ~ e~~ } 4 ~ t•~,,~ 'w u; ~ ~ , 4 Yt'' ~ ~1~~ • -7?;9~y.. ~i, 1 c:.~~'. " ~ 'i~i, ~ ~ ~ ; . .~)t ~ ' it~~ ~ ~Y~;•~ ~ ♦ ' 'ttl~'1 M ~ r-.. t a .r' . • t•~' ~ '.~d,. ~ ~ ~tiY" R 1 • ~ i ~ ' • ' - ~C'r ~ ~ , ~ , !'L ~ (Ci{; "1:. I • t }~L~ ' t+ it•~ ~ . y . . ~ C y ~iw~" ~ ' ~ t' .w ~1~ •t, . ~ ,1: r' . Q ,~(],i,~y , „1~~'. ~1.~ r. THE PiNCd t i C)6MftlPY r f ' ~ ~~`~ir.~ ~~1', t , ` ~ ` ~ ' ~r• Y~ l• ~ N~ca,.,.~ ~ , ~I ; ; • ~ t ~ r.= ~ . f, ~ i .r " :~at~• ' ,+i , ~y• • 'a•~ ''L,.. f' - ` ~ V i ~il, . ~ • : .5 v~~. ~ y. • i~`~ \.I ~ f . ~ i ~BOWf~{Nrt~ W t ~ j ~ itl„ ~ • ~ C:~ '1• :'i f • p0~ ~~:s . ~ xrrL~J.. ~ ~~'f`1~C~~t ' : ch ~ ' ~t, t t• s~. .6 • : , ~ ~ 5::h~:~ ; , L~ ' ' ~ ~ ~ ~ z,~. ~ , ~ ,r;,.,~~•c: ; , ~ ,1. . ~ ~ t~ , f .s• ~,ce•~ .1t~} , . ~2t~'` ",i:. • . ~ . ;i~ r~b~: r ..i ,i ' j , ' ' ~ . ~Cs"• 's {~a1,'~,t';~;', ; ~A • ` i :V{, .7~w!'~ " XF~~•~'x 1~ ~ • ii. ~ ~ 7 ,t t' 1~ L~;4 1 . ~3 , . , y. • 1•' ! 1 ~Y~ ry, ;~tL ik~'~;~'+ . -~i~ti.d'i . ~ . ,t , ~ • ~r '~t,~ ~ ~ ,r~p„t ..t~~.,,, ~r , : r~ • ~ ' ~ y,t~~ J~ ~.fie ~''!Ilc•r ~':1~ywr1' vM~n~; r~ . +!Pa`'. `3 1''~,7.. +l (~l~.. `t ,~1'~ ,~t~ ,c, .Y.c: ld".;Gyi , .1. .S.• . , ~ • j ~ ' HhA ~ ' 1 !Y~ 1~~ ~!~~1 `r ~pr . • . ♦4~ 1 ' _;1;`-~ ' . ~ ~ti . '1'. .l,r J,• : , • i ~ ~'c ' i' ~,~.~~_,~,.,i....._. ` ~ M +~r' ~ ~ _ ~ j ~rtB~ , 1' . E. t . c , r . ~ • me i ~ .i- ' . z•i i,~~; . . . 'C:. : • ~ ' " . • . .,ar . ;:t?'' .1h ` ` ~ ~ ~.4 SxB ' ~'a. a~ • • ' Ni} v.~'~ b~.;~7t ' ~ , ' , n^ ' , • ` ~r~: ~ 't~ i ti? 1 `~r l•iNeya!':t-~~ ~i~~ ' . i :y ' . , .~:•:~.~•tr.;..~~: lr~ .43; i; . , . it ' A t,Y _ ~ . : . s•• ~ y 1(~ ~4~ ,~i~ ~i' .(~L~ ~~i, l. iir•'~+'•'it,'k:=..~~~.~i~ ' r ,~1 • \ '~a~'. ~ t e. ' ~ :t`. . . ' 'f'`'~',~ ' • : . . ' . \ ~J~j ']r ~ ~ t~ ~ii~:,• r. i~ ~ , I{~` C~ ~ ~ •;I'~ ,~7: ,Y ~ • ti vi..~ . ~ • ' . ~ . . S%B hester , • ; . . ' ~ -~B.° ~ 1•. ,y 1!;'~ i 'ti` . r ~ ' ~ .Rt~' I • ? a ` 34' . ~ ( r 'y. . ~ ` SxB V~ .:wr.,~,~T~I~' ~f~''`A ~~r~~:.i• sne'y, ~ . ~ ,I YN ,Nn • . S, i e . ,.el.~'%•+• ~ ~ . ' , ~ } • , i: r, ; , • ~ ~'i ,y,~ d~ . •t • ( e ~4 ,'p F.1 , :5(~S f!'.=~, , .t~;~~~y' ~ I,:..R•i,~ ~ 1 , . : ~ . ; •i f,~~~ ~ ~ ! ~ n + 1.,,_ ".I ~ . j ~ • . a~. _ ~ ~ P4A'~~:~~`• .a _,~~i~'OU e~.• :ti;i: r X ~ l-_... 7~ i.. J , ( ' + `'r•• ~y, . . ~i,. ~ ~ '~~~f, ~ w ` ~ ' i'~~ • ' '~'R j `Y"Y't.q i:J• ~-V y ~ • ~ ~R~~,i 1 5 , \ ~ i • ~U . ~ . . ~'Y ~ + , . w~~, . . a . _ :,1.: ' ra~ 3' • _ , 6 9d°EL SgEiYEY . ,nit Vle-92; ivoocllnnd graup o; not in a, range site. Spa- terraces and ariaeial Hoaci p3ains ricar Collrztr, and Chat- ane laam---capabiliti• utiit lVe-4: woodIancl bratin G; iiqt tarov ui the eeiitrzl part af Spokane Couzitr ;1~Iast slopes ~ .n a range szte} S"'ka.ria. r~*wa_ are Set«eeii ? 7nd ld percent; % fen= :ire steeper. Iiepre- Spakane connplex, 30 to i[k percent sldpes (5sE).-F ara sent.ztive proFiie: O to iO pef.'Ceilt af °tlias complex iS mo[1eraYE11 _zha1ln►S° Lf to 2 inChes. verp aiark arAy'i5h-brnR-n, resr _'n3ble ,avel1y }pp];1t1@ ~.Oatri ; fTOlri 15 tb pCI'Ce11G iS wrp01.ai1e loam thlt caarse .aarir lot~m ;graaular structure ; neut;~l : undistiirbed ~;~s B slope r-Lnffe of 30 to aa gercrait; tlte rest cor:=_isrs 4f areas hsre nn organie mat 1knch thiel: on cte sure:ice ~-lvsc+a-w sails ancl o'ther Spok:une soils. The mc:ei;ately ' t41? inekes, dark-tirown, frlallle a areuy eo=nse saasdy loaui ; linllotir Spokane Ioani lias a surface I-.}rer 3 or = i2iches slightlr 1cid, mgt3furn aCid belpsc a depth of -i ..ucbes. y to 24 Lncbes, darb yellowish-brown grarelE- lQanaT cvarse huaiier than that of S ~okaiie laarn, fl t❑ 30 ~rercex:t slopes, sand < sli;lstly acid. ..nc~ is 20 to 30 incl~es ~ee ta ~SS~lrock. S~arface : anoif is 24 uachgs gaaTeiry caerse sand. ra~aid oc vea-y r:~pid, au~ the liazard af erarion w very ~`lie coPar n# the surface Iai•ez is rery c11rk gr;iyish brown evere. ta very dark- browxt. Tlxe subsail ran;es from dark brown 'I`liis ccan3plex is tised as rroadl~nd and for Iitnire-l ~raz- t4 clark rellowisli brown itt coior anEl f rom griPelly sandy .iicr. (As a coinples : czpalailit~ unat VIIe-1. E~- corn- loam to ~r1re11~ loarur coarse sar~cl in teata~ e. Gr:~re11y panei~ts ; S~~ok;zne loazn. niocler:tselv siinllo~r-a)Zl~1]ity cvarse sancl is :~t ac~teptli of ?Q to 30 inclies, ~ sn~ne 2r~~s Lnit 11-IIe--1; n oa(lland'groiip i: not aii a ran~e site. caf~blestoaiesocctFr tlirot~~Ixout tlie psv6le. : mucli :zs 1O `s~sol~~.ne lo;a~~~--~apa}~ilitr unit ~~Ye--?: ~rooclIar~a group erce~at of :ome a~•ens coiisises of other Spr~~l:~le soils; D J; iiat in a range site) -e~ ❑~-~tc,r,o? -e perceitc of ~iotiner ~r;~~'elly szlt loai~a; na~.r~ 3 percent ❑f Spa~:ane very rocicp cnmp ex, 0 to 30 percent slapes ClartoiY saaclr toam. StC}.---Froraa 50 ta 80 13erceiit af thus mappinz umt is f11is soil 'is sQmewlYat eNcessirely di-a~~ed and 1ias naderately slitillozr Spokane loam; the resc roas:its of mozlei•;ltelz' I'~tp1[t pelmeabi1iC-v. IL Ilold5lez~ [h1n 5 inchgs _r~,niie roc1 outcraps ancl of 3YoYcaw soils +~t• orher S~SO- of ~'ater tliit ~7lants can uW~. I't is lasr in ~zrtilit~`. Zn ~~.ne sr~ils. These soils niaiLe up 15 perceiit of ~a~z are:~s. gener:~l. it 1s easy to ~rorl~. l~oacs af masi ~~lMats penetrate (r1s a cornplex • capabili'tr uiii't "SIIs-9_. Bi• Lompv- n171i• ti fser inclies inta tlie oF°az•ellv coaiEa ~an~~, Sitrface ients: Spol~ane loa~n, inaderately~ s1~~.Ilow~aaabalaty raui4f~ is sloSr. ;~n(€ rile haz:ircP of erosion iW z'.-'aht. init VIe-?; troodland ,70ii p T; not m a ran"g."e siie. Racic Mosc o£ che acre~ae is used as woo!1a7d aiiel for outcrops--capability xinit VIIIs-I; nat in awoocUaild Yie1cI,s of fora~e are Iow. Less cLan 16 perceiit ~roup or rang$ site) ~.~1 ~c_ ~CC.ro{~ c.~►~.a.+~' is euit~~-atecl. 1I1CI onlr ~ few axva3l axeas are irt•iga'ted. Spakane very rockYV e Mples, 30 to 70 pereent sIbpes ~ The crops --t-awn are a1f.a1~= ~"L axid ggrnss far har nr plsture. ;StE)~Fram 54 ta 80 percerLt af this MngpiLng uut is WI72RL Dl• z•re ~on-z7 du~i~~~- reestnbl.islun~t bf a1falfti moderatelr sliallow S~~okai~e Ionn~. The rest co~ists of ~n~~ ~r~~~. ' Le~ii~~es t~es~~oncl~to sulfur and :ametimes to RlllfB iC3C~ ~iZ~C~O]~ ~ ~ ` 1 lioron. ( Cap:~~ilitr 4~.ic ~,~~-7~ ; erQOdland zroup 17; nnt , The acrea~e is tise~l for L]il]beY :2ncl for grazan7. :l`lle i11 ti riilge site) ase of tractoas for la!~giaie is limiteci. (As a ec~u1~Ies : SpringdalQ -r~.vel1y laamy sand, 34 to i~1 pea•cent capa3~iiztt= tuiit ~'TIs-?. I~y cginpolieiits: Spa's:,ue sail slopes <5zE1.-Tlias soii is mnderate1v extenz-a:s an terrace --ea.p:t,bilitr unat VIle-l: ircaodIaiirl groitp 7:noti iii a breaks aii(l colluriiil slopes nlonio nnjor dra:naffeways iTt ran4e site. RoclC fl11tC1opS---Cap:Lb1T1ty i11S3.& TIII=1 ~,~,h : TLOC the cenrral pii•t af klie cauntV Representaz:re frofile: iz~ ~~•aocllznc~. ~rnii~ ~r r:~p~~e ~ite} Sg3o~.ane extremely rocl~y comD7e~, 20 fo r[1 pereentc~4~co 11 inrhe=, dark-brawu ararelly 1onmy sanr3: zeufrai: grau- uias strur,turQ uutl siiahtly dnrP;er calar in apger 3inel~es. slopes fSuE}~ ~'rom ~4 t~r 5(1 ~ercent o~ t~i~s nial~pi~.g uni~ 11 to 17 iaches. brawu grare3lr toamy sand; 'ew darl;-brown iS a tsio[leratelr shallow SpoknIle Ioam tlxit has a Siope and redrli=h-hra.eu ruottles ; neueral. ringe Of 30 tD rQ pez•cezlt. The resi colisists of SOCk ottC- 17 to GQ inches urQwn rery brarellp cQarse 3and; neut.al. crops_ The acreage is usecl for eimber aneZ far ~razir~g. The testure of tlle surface ]~,~-er r:sn~a =ram -r.•~,~velly (ks :t coi~lplax: cti~a:sbilitr unit VZIs-?. Bvcompoa loamv sand ro ~ra~-ellv or cabblv sancl. Tle ~r~.~=el coti- tieiits :S~~ol~aiie soil--c:~p~~r~it-r tt~it ~`~Ze-1; ~oodl€~ntl tent vf tlae =u1)~oil rnnges frvm 40 to JO Z~ercent. As mucli ~roup i;iiot ia~ a raz~ze sitc. ~?ock o~itcrop~:~p1bilit~v as 14} perceiar of saxnQ arens cotisists c~f _1T;~r}~de ioam~- conrse tuiit VIfts-1; raot in a«ooclland groiip or z•nnrye 4iza} sa13d. 0 to .0,0~erceiat slopes, az~~l Qf other ;~pr~aciale voils. ~ T~~is soi1 ~vtxte~'I~:tt e~;eessit°eI~' d~•air~er_1 and llas 1nod- SpI lilgdaLE ~er1eS aiately rapid pei-meabilirr. It livlds less thwn 6 inclies of ~r:~#ertlia't planis can ure. The ferfiility is low. Root peite- Tlie Spriz~gdale series consi;ts of se+mers-ha't escessively ti-tti4n is cleeg. Tlie use of niaChinel-}r rs €lifficult. Surface drainetl, coarse textuz•ed nnd tnvderatel3t cQnrsa Lestured, runoff is slow to mediiun, an[l the iinxard of erv=zoiY is ;rnvelly and cobbly saiTs. These soils f oa•mec3 iaa glacial slight to nioderate. aautwash n-ii3etl with sarue valcanic ash, itader pvaderosa This sail i;z used ns.% saiirce of --mvel for concrete. TheL^e pins and grass. Tlie} are nearly Tevel to very sreep sails is soine ~azin; an the 1ess sloging ;~reas. but yiel~s of on out~rasl7 terz~eces nnt3, floocl ~~€~.ins. T1~e 7un~aI pre- farage ,tre lo~r. (Capability un7t VIIs-1; woodland cipitatioii is 15 ta 18 inches, 2.nd the frost-free sei=oa is o--ronp 19; noi in a, r:cnge szte) about 140 days. Sprangdale graVeilp sandy lcsam, deep, 0 tA 20 pereent Sviis of tlie S 1aiingda1e series are used for aifal#a, 7z;ess, slupe5 fSxBl:-This soil ~ias a, suaface xayer I or 2 inches anc1 ;rain. 'I"lze3■ are also usecl #or ;z=nzin~; znel as thicker thin th3t of apringcial$ gm ►-e11y sazzdv Ioam, to wovdl:btid. 20 percent s1Qpes. anzl tlie degtli to ~ vel ar~d ~abblestones 5pringdale ~;ravelIy sandy laam, 0 to 24 percenf is more th:~n ;6 iiYClles. '~liss soil 1ioliIs ato tiaaclzes ❑a€ siopes ISw81= T3iis as the daminant soil on tbe outwash iv2ter tlint plazats cai use. _ls anuch as 10 percent af some SPQK.L`s c C.'(3T7i7`I°Yy TiV:1a=CTaN 37 reas consiwts of ❑tlier Spri►i-dale =oiis, anQl <is Fi«rcli :~.s S Tei~aa gx•a~Telly silt loam, 20 tv 30 percenx slrsges Perrer~t cansts~.s of I3oruiet• 'tiz~ C1~.3•tan soiIs. (TeCI.-Tlti.s gravellv sail has niediuzn to -npid surface This saFl is used far tlie same erops as Spr_ncrtlale ruaiot} ,iiid a iiiocierate to severc li.iZ-l£d {]f e:'+7?3i7Y1. 1Lbfl11t --r%veliy sancdy l0,1ni. qto 20 percent slapes; bitt prociuces vpercent of uoane areas eaiisista af Berrih:il ancl Schu- 1~her vie3ds. (Czip.il~ilitr uniz I~'~j; iraoc~Iarca ~raabp rnacliersoils. 3: not in ,t range sire) Tlii5 sail i5 u;e~I Primarll}T fQL' tI]Ilber pL'❑Cl':ct10I1, SLLL:Ll1 Springdale cobbly sanedy loam, 0 ta ?D pereent stapes •Lreas 1re s~eded to tiiiaa11 zra in or to o-rass ar-31 egumes for (SyB).-Tiias sail coilFains arsveP ancl coUblevtOLea oLt a laa v or pmecu re. (Capnbilicr tiiiit Vfe?. •rc•Ddlnnc~ Oroup eptli of 20 ta 36 iziclies. =Ls mucli ar 1(~ percent )t joilta T; 11t~t ~ a ~•1r~ge site) `y~ re:es coitsist.s of otlier Sl~rinoc~~,le snil=. Tekaa ~~exr rocky camplex! 25 to 5a percent Zopes This soil ls tisecl as rroosllc-taisl and fvr ~razin~. :,Cap~.- (7kp).--Fro~n 20 fo 60 pereent t~f tlias mapr.~_n~ unit con- Uility tiulit VIIs-1; wootlland ;rorap 17; noi in a a•ange si: ts af sand:cane uutcrops ; tlie rest is a, Tel-Kaa gravePly ite} 51lt lQiL17Y tP1aL hfil9 a 510pe I•ange af 30 ifl 55 -)ercent. The zci en n is usecl for (_s coml~le-s. capakrility '1'e~~C~a tieT1~:, i~it ~~"Tls-?. ~3v coin~~c~nen'xs : Telco~ soil-~_n~abi3ity r~niz '~l~?; ~~+~r11.in~l gxa«p 7: aiac in ti r:inge Gi:e. Rock out- The Tekoa serie;5 coii=i;tv of well-drnined. =;tive11y; cxaps-capabilit-v iuizt 'L`IIIs-1; not in awcocilanrl gr4tip aediutia-rexturpct sai1-. Tl~ez~e sotls fvrmed LuicZer-=aiiafers ar r:rnge site} .Gnd grasses ux weathered =andstane, quaatzice, aac£ Chale. Ti1ev ❑ceupy gent1V S.100111Z to rei-v sreep aiicl Uhlij SerZeS -ioi2ntauaous are:i=. 'rlie inniial pz•ecilaat."Ltion As :bnui, nelies, ancl tlie frvzFz-€ree se;i~on is aUour, 120 clars. Tlie soi1s of tlas Uhlia Series are dqrk _olored; welI TeI.oa soils are ttse(t for ~a•~tzrn~. :is ~roo~Tlinei. aiicl as ~~r:~Paaec~. aiicl iiiediuni teazure~l. Tlier ;~~•e -ery c~eeg far rrilcliife 1aalaitat4. ;1, fe.r siz7;~l1 arets are tic-zed for c-Taizi, rhe iaiost pnrr. bz;i bectrack- is at deptli of 3->1 to -10 inches miss, and leattjx-ies. in some place=. T13ese yaif; farmed nzicler g^'-;ss in glacia1 Tekoa ;ravellp silt loam, 30 fo 35 percent slopes till mised in rlie upper pirt rritli loe=s zn'd -olcanic ash. tFeQl.-This sail occurs on Tekon liIau.ntain and _iznilar Tliei• occu )z• LTentlv sloping to rnaeleratelr =:cep iiplantis. t'1'O]110t7CC]L'1E5 in tlie councy. Mo,t rIopes are be:-,reen 30 T1ze arulual ']i'EC11]dat1oi2 1S 15 tp 21 1i1CIlES. TaB fraSL-f1'Ce nel 43 percent. Representa'tive prafile : seasan i5.1boiiz 140 tlav2. 4t0 14 iushes. darb-brown. frPahle gravzUr siit lqam. z:anular Uhliz soi1= are lzcerl for gi•nin; peaS; ien til _.Z. z:a:_s; a1~~~faj Fll tLlC LSpPeI' 5 En ches ; neuc ral, gra.di n, ta slfghtlp ac:d b elam ti'e~etll~e5. nriil areharci fi•uit2. a denrh of 5 inriies; un~ii.turbeci nreas hr~ee an or~ aic uaAt ~IZIig sidt Iaazn, 5 to 9-0 peicent slapes {r,31---Tli~s is I aiicli thscsc on rhe surtuce, the cloiuasannt _ail oii I'eane. Ui•cliard. 1nd P:easant Prai- .14 to ?Q xnehes, daek-bcoTrn, friable grsretly t:earr :tc aaam ries in #1ie cenEr:L1 azi of the cQii~ity,'~rliieh :aceires 18 tc~ that ~ireaks is~to pcisnxs 1 tv ? fz~che: ~rir3e a.nd °•3en into ~ ?I zngulnr U1act~s to'. iuc~ ~i~e, n~e~~u~u ncic~. iiielies of ~•ainf a11 :L1I1111:Ll1y. TC R1zO OCCIiTz .:Tl t17e g1aci;~1 20 to 35 inches, yeilawish_brvwn rerr grare41y ioam, a3assire tsutwzsli 131aiiz in ihe we-zzern and =otltIi-wes-zern parts of a1 $nelr 13illta7:3ied ;tuedium a.cizt. tlia countv, wliich receii-e 15 t0U3, inche= af r:ynfald. ~lXos~ 38 anches eiseturea yanzlstone. slopes are between G antl 16 perceni: afe:~= ara steeper. Tlie color of the surf;ace ltrer is brawii or dark :)rown_ Represerirafave profile • The testtii•e of tlie szihsoil is _-rarellr lamiY ar _=arellv o to 4 inches h1ack, rery fsrabte sttt 1oain;gxa: a13r scructuce ; ilt Ivam. ~"i•:~ccure~i ~~a~•ezlr rock oc~:u~-s ai a dep;h of meaium aczd. o 10 i11ClYeS. AS n1L1Ch :l5 S peFCE12t 4f .0171e 11'Qa5 Ct311315$s 4 [o 18 svehea. very dsrl, sray, rerr friaGle si:: tiDam abnve a uf Bernh ill znd Sch«inaclrez• soils. riepLb ot sv iizcl►es, breal;s tn ro nlaces rFe co Zj zach tli[ck: '`Izis sail is ~-ell rla•;►inec~ ~tne1. inotlerarel~- ~~e~•a»eit~ie. It `ii=t~klr qci~1; rery c~11Ii U6•9iL'f1, rei:~ friable sttt gonni belo«- kalds a to i incl7es v£ ~r~,ker tlzat Innts caa~ itye. T:ae fer- 1~ca r1eZ~~► ~c ane~e~: ~eucr~~. I~ _ [o 42 iacbeii, cl.irl.-brown. tltni lnaiai. $riabie t-t:on- ,i c1eptli gf llitt' 1$ LDCC. ROtJES p£12@t1'2T8 tv t12 :~L11Cts$CJTle. Stil'f.LCE 12 iuche,: iiisCitks itrt0 sulaalz.-ttlztr t+l66;s ?i _•3 1 ivcli sE•isie; Lititv#t iS i•q 1~ic~, :~ti[l t9ie lzhz;~rd of er+~=io~~ ia ?eg'ea-e, nefitinl 1`oiie of tlii~ sail 'as eultirnzed. Tt is u_ed foa• tzjnDet. for 42 ra U[7 F«rbes, bi-odvai. rerr Pri;ii,tt? rer.• nLe 1oam ;razin ' 0, antl bi= R iltllife. (Czpatiil3rr tiiiit VYe--?: woacl- Beut'at nnd;ra►ip i; noc ni a rancre -ite) The calar Qt rhe szirfRCe lnyer ranges frotit black to 3*et•Y ~`eF:oa graveTFy silt Ioam, 5 tv 20 percent slvpes ~~a~•k i7~~o2TaY. TI~e texture of tlze su~=oi1 ran?ea fiorr~ silt rTe81.-~'lie sii~•f:~ce l~►~e~• di this sail is a little t1~ic)~er th~.ii }oa~~i to ~-err ~le s;~z~cl~~ loam. Lime occters ;P_ places be2ow hat af Telcoa ~~•~.~-ell~- silt loqtii, 30 Eo 55 pereerxi slapes. a cIeprlI of 36 uIclxes. Sa~ =ome ~si~e;~s as 3nuc1i :~s 15 percent 3urf2ce rniiofr is meditim, aud tlxe ez•owion h;eznrd mvd_ af the subaoil c-4nsitits of caaise gr711Ife RilCl batalt sand, ei=ate. Surface gravei liinders cultivaiion in some plnces. ~rarel; aP~~l a fen col~hlesteiies. In ~3l:~ces :l ?C:l'G'elI~T ~,IZCl ks inticla 2s 3psrceni of vame aieas concists of Bernhill sandy layer is prez-ent ac adeptli Qf 30 to 4= inclies. As :nd Sehtu37acher sails. much as 10 percent af some nreas consists of ]3ernhill, This sazl is iia'Ed Il]illlliS' foP tltT1IJeP and ~•azinrn 1few Gliener•, 7now; aiiEl Hesseltine soils. snaaIl ai•eas are tzsed fflr sin.YI1 errain ancl alfadfa. or are TIus soil is well drainecl ancl maclerately penzieabIs. It -2edecl t❑ grass and Zegtames for p;t-sture or hay. Yield.s 4iolds 7to lZ xnclies of wra•ter tlint p3ants ran use. Ths re f:tir. Gr-tin and nas; craps respoaicl to iianro~e~a; fertilitr is 1iitrli. Roat petaetr2tian is ~-era d~p. `~lrexeis :gmnes respond ta stilftir aaad pltosphorus. (Capability txo (lifi~iculti* in tlie use af farm macliinery. Surface runnflf linit IV"; croadland zrosip 7;iiot in a z•an;e site} 1$ Il1edllllll. 71'ktl FhL' I]lzaI"CL (}f CrQS1p1I lv 1174]clL'1":tle, ~ 102 soM svxvEy TanLE i.-Interpret¢tio?a oT enqineerin,. Suitabllitv- j: sourceof- Soil features lffer-.ing- Soil series or type, j I Furiu ponci, and niap sx-mbols , ~ Topsoil 5and ~ Grs.•el 1 Road fill Highwa~• locstion Dikes or 'ex-ees t Rc::er.•oii• trca I ' 5pei-le (SoE-) _ F:, :r----- \ot suit- Not =.uit- I'air_ _ _ Slight to high su:cep- J3ocleratc s:soil- ' .lloderarr pcr- • able. able. tibi{it}• to frosu it\•; impe:~:ous mea~du}•. actiou; moderate u-lien cou:- ; permeabiliry; lo«• pacted; !c-n• ' i shrink-swell shruik-swe! + i pocencial. po[encinl. i ; Sgoksne (ScC. I GJJCt_NOC zllli- N~Ot a111L- GOOd---- ~ Sliglit susceptibilic'%• co Loxx• stnbilir\foc'.rrace co SpD, SrC. SrE, i ; able. able. frost :utiou; mod- semiperv:u+:_ ta r.ipid p~~r- psrt of SsC. erace to rapid imper~•io~s ml~t~. Sst, S,C S;E, Permeabilitv ; low when con:- and SuE;. I stinnk-.well pacted; loT putential. ~iirink-sive'] notentiai. i , ! I ~ , ~ Sprinedale kS•..8, I'nir_______ •:aod------ Ver} gooci_ Slicht =uscepubilit}• to Moderate to =igh Rapi(I co very Sx3, SyB, SzE). ; froSt action: rapicl stnbilit~-; sen~i- rapicl ~>crme- i ~ to ~-er}~ rapid perme- per~•ious co , abilicy. ; abilitv; lon shnnk- pen•ious n-ien _ sn-ell poteutinl. compacceci: iow • shrink-swell • ; potcutial. ; 4 ; . Tekoa (Te3, TeC, Fa«_____ \oc suic- \or Suit- Fair_Jloderate to high sus- -Moclerate stabilit}-: ~[oderatc to ' Te D, nACt OI able. sblc. ceptibili~• to frost semiper\zou rorapi(i pcrme- ' Tkp), action; moderace to impervious abilin•. ' rapid permeabilit}•; when compsct- { , low shrink-;R-ell ect; lon• shrisd- } potentinl. sn•ell poten:ial. i ' L-hlig (UhA, Un3, Goud.__ _\ot suit- I \oc suit- Fair_Moderate to very higli Moderate stabil- ;\foderatc per- ~ UmC, part of able. sble. susceptibility ta it}-; semip~:ons mcabilit}-. Cn8 and Co8). frost action; mod- to impervions ~ erate permeabilitp; when com- E lon to moderate pncted; loa- co shrink-sn•ell maierate shrink- ; pocential. swell potenual. ! Vassar silt loam Fair to \ot suit- ~-Not suit- Fuir_____ \Ioderate to very high 'Moderstc stabil- i\Ioderatc to (VaC, VaD, part poor. able. ' able. suscepti bi lity to it}•: semipen:ous' modcratel}• of Vs D) + frost action; mod- to unpervious ; rapid perme- i erate to moderntelv n-lien com- ; abilit}•. I rapid permeab+lity; pacted; low :o ~ ~ low to moderate mocle►•ate sF.rink- ~ ~ shrinl:-swell sn•ell potencial. potential. ~ ~ I ~ See footnote at end of tabt?. 7 SPOKA.-E CoUNTY, wesEIvcTOV 103 p-operties of soils-Continued Soil 'eatures affectino Continued Fnrm ponds- Continucd elgricultural Terrsces and Sen•agc dispos:il dramagc Irrigation diversions 1Catern-a}•s iields Trafficability Embaukmeiit ( i Loxv shear strength; 'NIoderate per- 'Moderate in- _lioderste re- 'Moderate resist- \Ioderate per- LoR- shear impervious n hen mesbility. L1ke rate: sistance to :►nce to erosion; meabilitr; strength; compacted; slight high water- erosion; high nater- liigh wafer- , moderate compressibility; holding moderate holding capac- lioldhng ~ load-carrying moderate capncity. permeability. ity; vegetation capacit}•. capacity; stabilitv. I difficulL to moderate I establish. permeability. i Lon siiear strengtli; 'Moderate to 'Moderate co 'Modernte re- Moderace resist- liocierate to T_ocr shear semipen-ious to rupid per- rspid mtake sistance to ance co erosion; rnpid per- strength; high impervious when mesbility. rate; mod- erosion; niod- moderate to lo« ►neabilin-; load-carrying comp:icced. ; erate to locr er.►te to rspid n•ater-holding moderate to capacit~-; ' «•ater-holcfi_3 permeabilit}•. cap;icit}•; vege- low, ~•ater- :iodersce to ; cap:uic}•. ' tacion difficult holding :apid per- to establish cap:tcit}-. ~eability. excepE on areas of Spoksne , lonm, n•here it ~ is fairlv easv to esteblish aiicl ' • where nater- n•1.-s aie likeiv ' to tie needed.' Hieh shear streugth; ! Rapid to very Rapid intake \Ioclerace to lon \Ioderate to lon• Rapid to ven- --za shear semipervious to rapid perme- ratc; mode:- resiscance to re;istauce to rapid perme- scrength; high pervion_ wheu I ability. nte to lo«- erosion; rapid erosion; moder- ability: moder- load-carrymg eouipscced: ~ water-holdig to ver}- rapid nte to loR• n•ater- ate to lon cspncity; rapid sli_ht compressi- capscicc. permeabilit}•. holdiug cspscitc; «ater-holdiug to verp rapid bilicv: moderace ` j - vegetacion fairlv eapaeic}•. permeability. to Iiiga scabiliti}•. ~ difficulc to diffi- : I cult to establish, ~ depending on cobi~lescone t contenL. i Low shear ;ti•eti3tti: \foderate to ;_lloder:ite to Jioclerate to lon• Mo<lerate to lo«• \toderate to ~OR• shear seuiipei•vious to rapid perme- I slow intake re~istance to resistzuce to rapid peraie- szreu3th; iuipervious n-hen ' abilitr. rate; mode:- erosion; mod- eroz-ion: moder- abilit} ; mod- moderste load- compacted; : i ste n•ster- erste to rapid ate n•ater- erste ccater- csrr}•ing uicchuui compi-ecs.. i ! holdin; ca- permesbilitp. holding cnpsc- holding ca- cspacitp; mod- ibiliry: uioder- pacity. it}•: vegetation pacit}•. erate to rapid ace st abllit}-. i fairlv e:is}• to xrmeabilit}-. ~ escal~lish where ' u•aterwa}•s are likelv co be needed. Low shesr strength: ~_llodcrste \Iodcrace to \[odcrate to locv Modcrate to lon• Mocterace low shesr senlipcr.•ioas co permcability. slow intake resi;tance to resistance to peemeablity; :creuo h; imper.-ious «•hcu ; rstc: hi;h ;o erosion: mod- erosiou; hieh to high to ven- moderate to couipacted; verv hi~h crate pernie- ~-en- high hieii n•ster- !ow load- niecliuui conipmss- Water-holdLng abilitr. n•ater-holding holdiug clrrying ibilitv: low c:ipacit}-. capscity;vege- cnpscicy. , capscit.•; stabili[.-. ~ tation ensy to tioderste 4 establish. ~ oermeabilitp. 'Modersce shear 'Moderate to _lloderace intake 'Moderate 'Moderate resist- \Ioderate to 1\Ioderate shear sirecigch: semi- moderately rate; moder- resistance to ance to erosion; moderately ~ scrength; pervious to im- rapid perme- nte wlter- erosion; mod- moderate wster- rupid perme- moderste losd- pemious wlien ability. holding erate co holcling capac- ability: mod- ~ csrrring compacted, capscit}•. moderately ity; vepetation erste water- capacitv; medium compress- rapid perme- easy to estab- holding mocieratc to ibilit~-: lo~- . abilit}•. lish mhere cnpscitc. moder~tely staUilic.-. naternavs are rapid likch• to~be permeobilit}•. ; neecied. __I-71~-~t^ S ~ , . HYDRflLOGY ~ OFF-STTE FLQti'V'S Uff-site tapQgraphy+ and existing dev'elopment in the surraunding area mitigates the impact of off-site flaws to this subdivisian. After an ex#ensive field Visit, off-sate effects to this subdivision are as follows: . - 1} Pines Cernetery is lvcated to the south and adjacent to the plat boundaaryy. Grades in the eemetery grevent flvw can to the site. 2) Existpng graties along the east plat bvundary flow to the Nartheast and away frQm this site 3) T)evelopment to the narth flaws to the east. [mpraVements to 12th Auenue wi1l - preaent aff-site flow frQrn coming anto vur property. ~ 4} Flows along the west plat boundary+ from back yards vn this site and the adjacent deVelopmenfi will flow north to 12th Avenue argd then #lQw west to a lcrw point. pines dac 4 i - - r3n5r'1\J 407- eAjtjlq = 75-, Zd~~ 10 /A l~~~ ~ /2rr~~~ ~ 1~~~ l~~►~3 ~~~,I~. - ~ ~ ~ U5N M 71 M"V .9a11 ~ ~ 6: 42 AP4,r.. ~ ~ ~ ~ 0) Jl# 770rPI-c- CA~.. ! iCI r V ' ~l.40?.x 3.5 uVAe- = Z, &ZA "369 tt4 C~1I~ ►2 ~ #3-~~ ~ ~C~ ~ v~tr~_, s14 J~c~►~ I'''~~ivl~' ` /-II :J`r51- 45:, As- /A Zs • D OG. =&Z;P(FR "*Tw ~~'~9.l~ ~ - - ~ - - - - - . - - - - . ~ 1,71 A 1 D 4rf ood9 te&A? ,~~Ia ~+~d~- ~ ~ ~ ~ . • G j f' l ~ ~7 ~ 74A.rv9~( rnNN-~ ~1d.Y3L'lifU " ~ailAm"~~kd 7152!5 74 ,1 ~ . ~ ~ ~ ~ 4~/~►~~~~''~ - ~ //V kll~ ~ ~ ~ 7 ~ ~ re L ]~ar~ ~ - I~`~ ~ ~ , ~5 = ~ ~ ~ ~ 5,158.5 P'e',4&7 = 26 ~ ~ I~ ~3 ~ ! 15 74 k-/k/ ~ ~r~ i~ ~ ~rrrl~~ ~r~►~' - ~ Z? ~~-D At4,0;~~- - ~ ~ ~ ~ • 7. ° t>~~Oz,, , 4. 5 ~ vs~ z~a cr4 - e- i i g6~1S ll~ ~a . 1 uO ~ ' G ~5~ • 3.~ DU/Ad. z NNN~ uOT' "W~~~" Ol9D ~ ~ L)Se . 3v r~v ~ ~ s ~ Vr 14,e. - L v~ ~9rz~ = ~ ' 0 7/~ - 42 ~I ~ Tor~L ~r~~9 =r~ ~4r3vv~ . ~p~,q 0 tG s L=/~d' ~I=0, 96o , LJT IQKP N z- ~ , - zi •?.S o y~: 4~~n~ us{ BOWSTRING METHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES DETENTION BASIN DESIGN - BASIN: ' REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 0 Single (type d 1 Double (type B) Total Area (calc.) (see H1) 2.19 Tune of Conc. (calc.) (see H1) 6.90 Composite "C" (calc.) (see H1) 0.40 Time of Conc. (min) 6.90 Area (Acres) 2.19 C' Factor 0.40 Asphalt Area (sq. ft.) 16613 Volume Providad 1021.5 ~ Outflow (cfs) 1 Area * C" Factor 0.89 #1 #2 #3 #4 #5 #6 #7 Time Tune Intensiry Q dev. V in V out Storage Inc. Inc. (min.) (sec.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1*60) (A"C*#3) (Outf.*#2) (#5-#6) 6.90 413.84 2.82 2.50 1386 413.84 972 5 300 3.18 2.81 1131 300 831 10 600 2.24 1.98 1468 600 868 15 900 1.77 1.57 1630 900 730 20 1200 1.45 1.28 1720 1200 520 25 1500 1.21 1.07 1757 1500 257 30 1800 1.04 0.92 1786 1800 -14 35 2100 0.91 0.81 1805 2100 -295 40 2400 0.82 0.73 1844 2400 -556 45 2700 0.74 0.65 1860 2700 -840 50 3000 0.68 0.60 1890 3000 -1110 55 3300 0.64 0.57 1949 3300 -1351 60 3600 0.61 0.54 2019 3600 -1581 65 3900 0.60 0.53 2146 3900 -1754 70 4200 0.58 0.51 2228 4200 -1972 75 4500 0.56 0.50 2300 4500 -2200 80 4800 0.53 0.47 2317 4800 -2483 85 5100 0.52 0.46 2412 5100 -2688 90 5400 0.50 0.44 2452 5400 -2948 95 5700 0.49 0.43 2533 5700 -3167 100 6000 0.48 0.42 2609 6000 -3391 DRAINAGE POND CALCULATIONS • Required grassy swale pond storage volume = Impervious Area x.5 in./ 12 in./ft. = 692 cu. ft. Grassy swale pond volume provided = 245 DRYWELL REQUIItEMENTS - 10 YEAR DESIGN STORM . Maximum storage required by Bowstring = 972 cu. ft. Number and type of Drywells Required = 0 Single . 1 Double ' TlNffi OF C(]NCEN'FRATTC3N {ruinutes} Tc {overland} Tc (gutter) - Ct= 0.15 L2= 557 Z1= 0.16 L1(A) _ 60 Z? = 50 N(A) _ 0.4 B = 5(A) = 0.02 n = 0.016 s = 0.017 Tc (A) = 3.27 d = 0.20 L 1 (f3) _ !i Tc (gu) = 3.63 N(B) = q Te(A+B) = 3.27 5(B) - 0 Tc(tat.) _ 6.94 Tc (B) = 0.0 Tntensityr = 2.82 Areas "C" AT A = 0.97827675 WP = 10.0770 0.38 0.90 0.342 R = 0.0971 1.81 0.30 0.543 v = ?.ss 0.00 0.00 o ~~(gu) _ 3.63 0.00 0.00 ~ ~(est) ~ 2.50 0.00 0.00 a 0.00 0.00 0 Hald.ing = 19.85 0.00 0.00 0 /fl "i Y C1tcil 1'L 1..omp "Yr ?.i9 0.40 Q=C*t*A- 150 Q{est.} a 2.30 Tc (xoral) = Tc (overland) + Tc (guner) Tc ([3Yerla[ld) ° Ci*(.I *N/Snfl.5)^0 CC =0. 15 L1 = L.eIIgth Df Ui+e1'Iand Fiflw - N~ friction factar of averland fi'ow (.4 for aVerage gxass cover) S = average slape of ovealand flow Tc {gutter} = Length (ft.)fVelocity (ft.lsec,)164 B= B+ottom width af gutter or ditch Area = d*B+d"2!?*(Z 1+2?) 2I = inVerse of crcass slope one vf ditch Z2 = inverse nf crass slope two of ditch ti = depth vf flvw in gutter (estimate, check estimate with Flovv) . Wetted perimeter = B*d+{ l Isin{atn( E 1Z 1)}+ l lsin(am(11Z? Hyciraulic Radius = R = AreafWetted Perimeter . Velocity = 1.4861n*R°'.667*s^.5 Faow = Velocity*Area n= 0. 0 16 for asphait ; s= lvngitudinal slvpe of guttet BOWSTRING WTHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES DETENTION BASIN DESIGN BASIN: BASIN-B REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 1 Single (type P 0 Double (type B) Total Area (calc.) (see H1) 0.62 Time of Conc. (calc.) (see H1) 5.10 Composite "C" (calc.) (see H1) 0.43 Time of Conc. (min) 5.10 Area (Acres) 0.62 C' Factor 0.43 Asphalt Area (sq. ft.) 5800 Volume Provided 490 Outflow (cfs) 0.3 Area * C" Factor 0.26 #1 #3 #4 #5 #b #7 T'ime Tune Intensity Q dev. V in V out Storage Inc. Inc. (min-) (sec.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1*60) (A*C*#3) (Outf.*#2) (#5-#6) 5.10 305.93 3.16 0.83 342 91.78 250 5 300 3.18 0.84 337 90 247 10 600 2.24 0.59 416 180 236 15 900 1.77 0.47 469 270 199 20 1200 1.45 0.38 499 360 139 25 1500 1.21 0.32 512 450 62 30 1800 1.04 0.27 523 540 -17 35 2100 0.91 0.24 529 630 -101 40 2400 0.82 0.22 542 720 -178 45 2700 0.74 0.20 548 810 -262 50 3000 0.68 0.18 557 900 -343 55 3300 0.64 0.17 575 990 -415 60 3600 0.61 0.16 596 1080 -484 65 3900 0.60 0.16 634 1170 -536 70 4200 0.58 0.15 659 1260 -601 75 4500 0.56 0.15 681 1350 -669 80 4800 0.53 0.14 686 1440 -754 85 5100 0.52 0.14 714 1530 -816 90 5400 0.50 0.13 727 1620 -893 95 5700 0.49 0.13 751 1710 -959 100 6000 0.48 0.13 774 1800 -1026 DRAINAGE POND CALCULATIONS Required grassy swale pond storage volume = Impervious Area x.5 in./ 12 in./ft. = 242 cu. ft. Grasry swale pond volume provided = 245 DRYWELL REQUIREMENTS - 10 YEAR DESIGN STORM Maximum storage rer{uired by Bowstring = 250 cu. ft. Number and type of Drywells Required = 1 Single 0 Double TIME OF CONCENTRATION (minutes) Tc (over(and) Tc (gutter) Ct = 0.15 L2= 215 Z1= 0.16 Ll(A) = 50 Z2 = 50 N(A) = 0.4 B = 0 S(A) = 0.02 n = 0.016 s = 0.011 Tc (A) = 2.93 d = 0.142 L1(B) = 0 Tc (gu) = 2.17 N(B) = 0 Tc(A+B) = 2.93 S(B) = 0 Tc(tot.) = 5.10 Tc (B) = 0.0 Intensity = 3.16 Areas "C" A*C A = 0.50571312 WP = 7.?452 0.13 0.90 0.117 R= 0.0698 0.49 0.30 0.147 V= 1.65 0.00 0.00 0 Tc(gu) = 2.17 0.00 0.00 0 Q(est) = 0.83 0.00 0.00 0 0.00 0.00 0 Holding = 7.66 0.00 0.00 0 Total A Comp "C" 0.62 0.43 Q=C*I*A= 0.83 Q(est.) = 0.83 Tc (total) = Tc (overland) + Tc (gutter) Tc (overland) = Ct*(L1*N/S^0.5)`0.6) Ct = 0.15 L 1= Length of Overland Flow N= friction factor of overland flow (.4 for average grass cover) S= average slope of overland flow Tc (gutter) = Length (ft.)Nelocity (ft./sec.)/60 B= Bottom width of gutter or diuh Area = d*B+d^2/2*(Z 1+Z2) Z1 = inverse of cross slope one of ditch Z2 = inverse of cross slope two of ditch d= depth of flow in gutter (estimate, check estimate with Flow) Wetted perimeter = B*d+(1/sin(atn(1/Z1))+1/sin(am(1/Z2))) Hydraulic Radius = R= Area/Wetted Perimeter . Velocity = 1.486/n*R^.667*s^.5 Flow = Velocity*Area n= 0.016 for asphalt s= longitudinal slope of gutter BOWSTRING METHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES DETENTION BASIN DESIGN BAS1N: BASIN-C REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 0 Single (rype P 1 Double (rype B) Total Area (calc.) (see H1) 2.33 Time of Conc. (calc.) (see H1) 6.37 ' Composite "C" (calc.) (see H1) 0.42 Time of Conc. (min) 6.37 Area (Acres) 2.33 C' Factor 0.42 Asphalt Area (sq. ft.) 19554 Volume Provided 1251.5 Outflow (cfs) 1 Area * C" Factor 0.97 #1 #2 #3 #4 #5 • #6 #7 Time Time Intensiry Q dev. V in V out Storage Inc. Inc. (min.) (sec.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1*60) (A*C*#3) (Outf.*#2) (#5-#6) 6.37 382.17 2.92 2.83 1450 382.17 1068 5 300 3.18 3.08 1239 300 939 10 600 2.24 2.17 1584 600 984 15 900 1.77 1.72 1766 900 866 20 1200 1.45 1.41 1869 1200 669 25 1500 1.21 1.17 1911 1500 411 30 1800 1.04 1.01 1945 1800 145 35 2100 0.91 0.88 1966 2100 -134 40 2400 0.82 0.79 2010 2400 -390 45 2700 0.74 0.72 2029 2700 -671 50 3000 0.68 0.66 2062 3000 -938 55 3300 0.64 0.62 2127 3300 -1173 60 3600 0.61 0.59 2205 3600 -1395 65 3900 0.60 0.58 2343 3900 -1557 70 4200 0.58 0.56 2434 4200 -1766 75 4500 0.56 0.54 2512 4500 -1988 80 4800 0.53 0.51 2532 4800 -2268 85 5100 0.52 0.50 2635 5100 -2465 90 5400 0.50 0.48 2679 5400 -2721 95 5700 0.49 0.47 2768 5700 -2932 100 6000 0.48 0.47 2851 6000 -3149 DRAINAGE POND CALCULATIONS Required grassy swale pond storage volume = Impervious Area x.5 in./ 12 in./ft. = 815 cu. ft. Grasry swale pond volume provided = 830 DRYWELL REQUIItEMENTS - 10 YEAR DESIGN STORM Maximum storage required by Bowstring = 1068 cu. ft. Number and type of Drywells Required = 0 Single 1 Double TIlVIE OF CONCENTRATION (minutes) Tc (overland) Tc (gutter) Ct = 0.15 L2= 492.02 Z1= 0.16 L 1(A) = 60 Z2 = 50 N(A) = 0.4 B = 0 S(A) = 0.02 n = 0.016 s = 0.0171 T'c (A) = 3.27 d = 0.21 L1(B) = 0 Tc (gu) = 3.10 N(B) = 0 Tc(A+B) = 3.27 S(B) = 0 Tc(tot.) = 6.37 Tc (B) = OA Intensiry = 2.92 Areas "C" A*C A = 1.07050368 WP = 10.5413 0.45 0.90 0.405 R= 0.1016 1.88 0.30 0.564 V= 2.64 0.00 0.00 0 Tc(gu) = 3.10 0.00 0.00 0 Q(est) = 2.83 0.00 0.00 0 0.00 0.00 0 Holding = 17.53 0.00 0.00 0 Total A Comp "C" 2.33 0.42 Q=C*I*A= 2.83 Q(est.) = 2.83 Tc (total) = Tc (overland) + Tc (gutter) Tc (overland) = Ct*(L 1 *N/S^0.5)^0.6) Ct = 0.15 L 1= Length of Overland Flow N= friction factor of overland flow (.4 for average grass cover) S= average slope of overland flow Tc (gutter) = Length (ft.)Nelocity (ft./sec.)/60 B= Bottom width of gutter or ditch Area = d*B+d^2/2*(Z 1+Z2) Z 1= inverse of cross slope one of ditch Z2 = inverse of cross slope two of ditch d= depth of flow in gutter (estimate, check estimate with Flow) Wetted perimeter = B*d+(1/sin(atn(1/Z1))+l/sin(am(1/Z2))) Hydraulic Radius = R= Area/Wetted Perimeter Velociry = 1.486/n*R^.667*s^.5 Flow = Velociry*Area n= 0.016 for asphalt s = longitudinal slope of gutter BOWSTRING METHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES DETENTION BASIN DESIGN BASIN: BASIN-D • REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 1 Single (rype ? 0 Double (type B) Total Area (calc.) (see H1) 1.17 Time of Conc. (calc.) (see H 1) 6.99 Composite "C" (calc.) (see Hl) 0.45 Time of Conc. (min) 6.99 Area (Acres) 1.17 C' Factor 0.45 Asphalt Area (sq. ft.) 12792 Volume Provided 1000 Outflow (cfs) 0.3 Area * C" Factor 0.53 #1 #2 #3 #4 #5 #6 #7 Time Time Intensiry Q dev. V in V out Storage Inc. Inc. (min.) (sec.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1*60) (A*C*#3) (Outf."#2) (#5-#6) 6.99 419.58 2.81 1.47 828 125.87 702 5 300 3.18 1.67 671 90 581 10 600 2.24 1.18 873 180 693 15 900 1.77 0.93 969 270 699 20 1200 1.45 0.76 1022 360 662 25 1500 1.21 0.64 1043 450 593 30 1800 1.04 0.55 1061 540 521 35 2100 0.91 0.48 1071 630 441 40 2400 0.82 0.43 1095 720 375 45 2700 0.74 0.39 1104 810 294 50 3000 0.68 0.36 1122 900 222 55 3300 0.64 0.34 1157 990 167 60 3600 0.61 0.32 1199 1080 119 65 3900 0.60 0.32 1273 1170 103 70 4200 0.58 0.30 1322 1260 62 75 4500 0.56 0.29 1365 1350 15 80 4800 0.53 0.28 1375 1440 -65 85 5100 0.52 0.27 1431 1530 -99 90 5400 0.50 0.26 1455 1620 -165 95 5700 0.49 0.26 1503 1710 -207 100 6000 0.48 0.25 1548 1800 -252 DRAINAGE POND CALCULATIONS Required grassy swale pond storage volume = Impervious Area x.5 in./ 12 in./ft. = 533 cu. ft. Grassy swale pond volume provided = 550 DRYWELL REQUIREMENTS - 10 YEAR DESIGN STORM Maximum storage required by Bowstring = 702 cu. ft. Number and type of Drywells Required = 1 Single 0 Double TUvIE oF cOrrcENTRArrar~ (~utes) Tc (overLand) Tc (guCter) Ct- 0.15 L?= 410 Zl= 0.16 L1(A) = 60 Z2 = 50 N(A) = 0.4 B = 0 S(A) = 0.02 n = 0.016 s = 0.01 Tc (A) = 3,27 d = 4.18 G 1(B) _ 0 Tc {gu} ~ 3.73 N(B) = Q Tc(A+B) = 3.27 S(B) = 0 Tc(tot.) = 6.99 Tc (B) = 0.0 xntensiry = 2.81 Areas „c" A*C A = 0.80000084 WP = 9.1127 0.29 0.90 0.761 R = 0.0878 0.88 0.30 0.264 V= 1.83 0.00 0.00 a rc(gu) = 3.73 0.00 0.00 a c~(est) = 1.47 4.0(1 (1.Q0 D 0.00 0.00 d Halding = I4.61 (}.OE? 0.00 0 Trrta2 A Comp ",C" 1.17 0.45 Q=C*I*A= 1.47 Q(est.) = 1.47 Tc (totai) = Tc (ouerland) t Tc (gutta) °I'c (owerland) = Ct*(L 1 *NIS^a.5)^fl.6) ct = 0.15 L P= Length of Overland Flow N = friction factor of averlanti flow (.4 fvr average garass caver) S= average slope of overland flaw Tc (gutter) = Length (ft.)/VePocity (ft,lsec.)160 B= Battom rridth of gutter or d'atch Area = d*B+d^212*(Z1+Z2) Z 1= inverse of crnss slope one of diteh Z2 = inverse of cross slvpe two of ditch d = depth of flow in gutter (estimate, check estimate with F 1ow) Wetted perimetu = B*da-( l Isin(atn(11Z1))+llsin(atri(11Z2))) Hydraulic Radius = R = ArealVVetted Perimecer Velocity = 1.4$6In*R^.667*5^.5 F1vw = Velocity*Area n =0.016 £or asphalt s= longitudinal slope n#'gutter BOWSTRING METHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES DETENTION BASIN DESIGN BASIN: BASIN-E REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 0 Single (type ? 1 Double (type B) Total Area (calc.) (see H 1) 2.43 T'ime ofConc. (calc.) (sce H1) 5.64 Composite "C" (calc.) (see H1) 0.41 Time of Conc. (min) 5.64 Area (Acres) 2.43 C' Factor 0.41 Asphalt Area (sq. ft.) 19802 Volume Provided 1127 Outflow (cfs) 1 Area * C" Factor 1.00 #1 #2 #3 #4 #5 #6 #7 Time Time Intensity Q dev. V in V out Storage Inc. Inc. (min.) (ser.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1*60) (A'C*#3) (Outf.*#2) (#5-#6) 5.64 338.31 3.06 3.06 1386 33831 1047 5 300 3.18 3.18 1277 300 977 10 600 2.24 2.24 1600 600 1000 15 900 1.77 1.77 1795 900 895 20 1200 1.45 1.45 1905 1200 705 25 1500 1.21 1.21 1952 1500 452 30 1800 1.04 1.04 1990 1800 190 35 2100 0.91 0.91 2014 2100 -86 40 2400 0.82 0.82 2060 2400 -340 45 2700 0.74 0.74 2081 2700 -619 50 3000 0.68 0.68 2116 3000 -884 55 3300 0.64 0.64 2183 3300 -1117 60 3600 0.61 0.61 2264 3600 -1336 65 3900 0.60 0.60 2407 3900 -1493 70 4200 0.58 0.58 2500 4200 -1700 75 4500 0.56 0.56 2582 4500 -1918 80 4800 0.53 0.53 2602 4800 -2198 85 5100 0.52 0.52 2709 5100 -2391 90 5400 0.50 0.50 2755 5400 -2645 95 5700 0.49 0.49 2847 5700 -2853 100 6000 0.48 0.48 2932 6000 -3068 DRAINAGE POND CALCULATIONS Required grassy swale pond storage volume = Impervious Area x.5 in./ 12 in./ft. = 825 cu. ft. Grassy swale pond volume provided = 832 DRYWELL REQUIREIvENTS - 10 YEAR DESIGN STORM Maximum storage required by Bowstring = 1047 cu. ft. Number and type of Urywells Required 0 Single , 1 Double - TRVIE [3F CONCENTItATION (minutes) Tc (averiand) Tc {gutter} - Ct = (}.15 L2- 426 Z1= 0.16 L t(A) = ba Z2 ~ Sfl N(A) = 0,4 8 = 0 S(A) = 0.02 n = 0.416 s = 0.0225 Tc (A) = 3.27 d = 4.2(] L1(B) = 0 Tc (gu) = 2.37 N($) _ Tc(A+B) = 3.27 S(B) = 0 T'e{tet.} ~ 5.64 Tc (B) = 0.0 Intensity = 3.06 Areas "C" A*G A = 1.42336432 VVp = 10.3066 0.45 0.90 0.405 R = 0.4993 1.98 0.30 0.594 V = 2.99 0.00 0.00 0 Tc(gu) = 2.37 0.00 0.00 U Q(est) = 3.06 0.00 0.00 Q 0.00 (?.OQ U HQicfing = 15.18 0.40 0.00 6 TotaZ A Gamp"c" 2_43 0.41 Q==C*T*A 3.06 Q(est.) - 3.06 Tc (total) = Tc (aves°Iand) + Te (gutter) T'c {averland} = Ct"`(I.el*NIS^0.5)"0.6] Ct = 0.15 G r= Length of Daaerland Flow N= friction factor af overland tlow (.4 for average geass cover) S= average slope of averland flov►+ Tc (gutter) = Length (ft. )IV'elocity (ft.isec. Yf 0 B = IIottom width of gutter or ditch Aret = d*H+d^2!2*(Z 1+Z2) Z 1= inverse a£ cross slope one of ditch Z2 = inverse oF crvss sFcspe two of ditcb d= depth a£ ffaw sn gttt[er (esttimate, check e5timate with Flow) Wetted perimeter = B'd+(Tlsin(atn(11Z 1)}+115in(atn(Ilt 2))3 lF-Iydraulic Raciius = R= ArealWetted Pernneter . Velocity = 1.4$61n*Rn.667*5R.5 Flo`v = Veiocity*Area ' n=(?.4 16 for aspbaii s=longiiudinal slvpe of gutter BOWSTRING METHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES • DETENTION BASIN DESIGN BASIN: BASIN-F REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 1 Single (rype ? 0 Double (type B) Total Area (calc.) (see H1) 1.29 Time of Conc. (calc.) (see H1) 5.00 Composite "C" (calc.) (see H1) 0.39 Time of Conc. (min) 5.00 Area (Acres) 1.29 C' Factor 0.39 Asphalt Area (sq. R.) 8741 Volume Provided 750 Outflow (cfs) 0.3 Area * C" Factor 0.51 #1 #2 #3 #4 #5 #6 #7 T'ime Time Intensiry Q dev. V in, V out Storage Inc. Inc. (min.) (sec.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1#60) (A*C*#3) (Outf.*#2) (#5-#6) 5.00 300.00 3.18 1.61 648 90.00 558 5 300 3.18 1.61 648 90 558 10 600 2.24 1.14 797 180 617 15 900 1.77 0.90 899 270 629 20 1200 1.45 0.74 957 360 597 25 1500 1.21 0.61 983 450 533 30 1800 1.04 0.53 1003 540 463 35 2100 0.91 0.46 1016 630 386 40 2400 0.82 0.42 1040 720 320 45 2700 0.74 0.38 1051 810 241 50 3000 0.68 0.34 1069 900 169 55 3300 0.64 0.32 1104 990 114 60 3600 0.61 0.31 1145 1080 65 65 3900 0.60 0.30 1217 1170 47 70 4200 0.58 0.29 1265 1260 5 75 4500 0.56 0.28 1307 1350 -43 80 4800 0.53 0.27 1317 1440 -123 85 5100 0.52 0.26 1371 1530 -159 90 5400 0.50 0.25 1395 1620 -225 95 5700 0.49 0.25 1441 1710 -269 100 6000 0.48 0.24 1485 1800 -315 DRAINAGE POND CALCULATIONS Required grassy swale pond storage volume = Impervious Area x.5 in./ 12 in./ft. = 364 cu. ft. Grassy swale pond volume provided = 375 DRYWELL REQUIREMENTS - 10 YEAR DESIGN STORM Maximum storage required by Bowstring = 629 cu. ft. Number and rype of Drywells Required = • 1 Single 0 Double TIlv1E OF CONCENTRATION (minutes) T'c (overland) Tc (gutter) Ct = 0.15 L2= 260 Z1= 0.16 L 1(A) = 60 Z2 = 50 N(A) = 0.4 B = 0 S(A) = 0.02 n = 0.016 s = 0.0226 Tc (A) = 3.27 d = 0.16 L 1(B) = 0 Tc (gu) = 1.70 N(B) = 0 Tc(A+B) = 3.27 S(B) = 0 ' Tc(tot.) = 5.00 T'c (B) = 0.0 Intensiry = 3.18 Areas "C" A*C A = 0.63165711 WP = 8.0973 0.20 0.90 0.18 R= 0.0780 1.09 0.30 0.327 V= 2.55 0.00 0.00 0 Tc(gu) = 1.70 0.00 0.00 0 Q(est) = 1.61 0.00 0.00 0 0.00 0.00 0 Holding = 9.26 0.00 0.00 0 Total A Comp "C" 1.29 0.39 Q=C*I*A= 1.61 Q(est.) = 1.61 Tc (total) = Tc (overland) + Tc (gutter) Tc (overland) = Ct*(L1*N/S^0.5)^0.6) Ct = 0.15 L 1= Length of Overland Flow N= friction factor of overland flow (.4 for average grass cover) S= average slope of overland flow Tc (gutter) = Length (ft.)Nelocity (ft./sec.)/60 B= Bottom width of gutter or ditch Area = d*B+d^2/2*(Z 1+Z2) Z 1= inverse of cross slope one of ditch Z2 = inverse of cross slope two of ditch d= depth of flow in gutter (estimate, check estimate with Flow) Wetted perimeter = B*d+{ 1/sin(atn(1 /Z 1))+ 1/sin(am(1 /Z2))) Hydraulic Radius = R= Area/Wetted Perimeter • Velocity = 1.486/n*R^.667*s^.5 Flow = Velocity*Area n= 0.016 for asphalt s= longitudinal slope of gutter BOWSTRING METHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES DETENTION BASIN DESIGN BASIN: BASIN-G • REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 1 Single (type P 0 Double (type B) Total Area (calc.) (see H1) 0.57 Time of Conc. (calc.) (see H1) 5.00 Composite "C" (calc.) (see H1) 0.46 Time of Conc. (min) 5.00 Area (Acres) 0.57 C' Factor 0.46 Asphalt Area (sq. ft.) 6553 Volume Provided 590 Outflow (cfs) 0.3 Area * C" Factor 0.26 #1 #2 #3 #4 #5 #6 #7 Time Time Intensity Q dev. V in V out Storage Inc. Inc. (min.) (sec.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1*60) (A*C*#3) (Outf.*#2) (#5-#6) 5.00 300.00 3.18 0.83 334 90.00 244 5 300 3.18 0.83 334 90 244 10 600 2.24 0.58 410 180 230 15 900 1.77 0.46 463 270 193 20 1200 1.45 0.38 493 360 133 25 1500 1.21 0.32 506 450 56 30 1800 1.04 0.27 516 540 -24 35 2100 0.91 0.24 523 630 -107 40 2400 0.82 0.21 535 720 -185 45 2700 0.74 0.19 541 810 -269 50 3000 0.68 0.18 551 900 -349 55 3300 0.64 0.17 568 990 -422 60 3600 0.61 0.16 589 1080 -491 65 3900 0.60 0.16 627 1170 -543 70 4200 0.58 0.15 651 1260 -609 75 4500 0.56 0.15 673 1350 -677 80 4800 0.53 0.14 678 1440 -762 85 5100 0.52 0.14 706 1530 -824 90 5400 0.50 0.13 718 1620 -902 95 5700 0.49 0.13 742 1710 -968 100 6000 0.48 0.13 764 1800 -1036 DRAINAGE POND CALCULATIONS Required grassy swale pond storage volume = Impervious Area x.5 in./ 12 in./ft. = 273 cu. ft. Grassy swale pond volume provided = 295 DRYWELL REQUIREMENTS - 10 YEAR DESIGN STORM Maximum storage required by Bowstring = 244 cu. ft. Number and type of Drywells Required = 1 Single 0 Double TIlVVfE QF CC?NCENTRA1'ION (rcainutes) Tc (overland) Tc (gutter) ct= 0.15 L2= 160 Z1= 0.16 L 1(A)= 50 Z2 = 50 N(A) _ 0.4 B = 0 5(A) = 0.42 n = 0.416 s = 0.0335 Tc (A) = 2.93 d = 0.12 L1(B) = 0 Tc (gu) = 1.07 N(B) = D Tc(A+$) = 2.93 S(B) = a Tc(tot.) = 5,00 Tc (B) = 0.0 lntensity = 3.18 Areas "C„ A*C A = 0.331683 WP = 5.8676 0.15 0.94 0.135 R = 0.0565 0,42 0.30 0.126 V = 2.50 0.00 0.40 4 Tc(gu) = 1.07 0.00 0.00 (l Q{est} = 0.83 0.00 0.00 4 0.00 0,00 0 Hoiding = 5.70 0.04 0.40 4 'Fotal A Comp "C" [1.57 046 Q=C*T*A~ 0.$3 C2(est.) = 0.83 Tc (total) = Tc (overfand) ,r Tc (gutter) Tc (nverland) ~ Ct*(L l*NIS"0.5)"`(1.G} CC = 0. 15 L, I= Length vf Oaeriaa3d Flaw N= friction faetor of oaerlautd tls~ww (.4 for average grass cover) S= average slope of oVerland flow Tc (gutter) - Length (ft.)FVetocity (f3.lsec.)I60 B= Battam w+idth of gutter ar ditch Area = d*B--+-d"2I2*(Z1+Z2) Z I - inverse of cross slope one mf ditch Z2 = inverse of cross slope two of ditch d= depth of flow in gucter (estimate, check estimate with Flow) Wetted perimeter = B*d+( llsin(am( l lZ 1))+ l lsin(atn( l 1Z2)}} Hydraulic liadius = R = Area{Wetted Perimeter . V~locity = 1.4861n*R^.667*s".5 Flow = Velrscsty*Area n = 0.016 for asphaIt s=1vngitudinaZ siope af gutter BOWSTRING METHOD (TEN YEAR STORM DESIGN) PROJECT: V. PINES DETENTION BASIN DESIGN BASIN: BASIN-H REVIEWER: GSM NUMBER OF DRYWELLS PROPOSED DATE: 10-Oct-97 1 Single (rype ? 0 Double (type B) Total Area (calc.) (see H1) 0.68 Time of Conc. (calc.) (see H1) 5.00 Composite "C" (calc.) (see H1) 0.53 Time of Conc. (min) 5.00 Area (Acres) 0.68 C' Factor 0.53 Asphalt Area (sq. ft.) 11124 Volume Provided 938 Outflow (cfs) 0.3 Area * C" Factor 0.36 #1 #2 #3 #4 #5 #6 97 Time Time Intensiry Q dev. V in V out Storage Inc. Inc. (min.) (sec.) (in./hr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#1*60) (A*C*#3) (Outf.•#2) (#5-#6) 5.00 300.00 3.18 1.14 460 90.00 370 5 300 3.18 1.14 460 90 370 10 600 2.24 0.81 566 180 386 15 900 1.77 0.64 638 270 368 20 1200 1.45 0.52 680 360 320 25 1500 1.21 0.44 698 450 248 30 1800 1.04 0.37 712 540 172 35 2100 0.91 033 721 630 91 40 2400 0.82 0.30 739 720 19 45 2700 0.74 0.27 746 810 -64 50 3000 0.68 0.24 759 900 -141 55 3300 0.64 0.23 784 990 -206 60 3600 0.61 0.22 813 1080 -267 65 3900 0.60 0.22 864 1170 -306 70 4200 0.58 0.21 898 1260 -362 75 4500 0.56 0.20 928 1350 -422 80 4800 0.53 0.19 935 1440 -505 85 5100 0.52 0.19 974 1530 -556 90 5400 0.50 0.18 990 1620 -630 95 5700 0.49 0.18 1023 1710 -687 100 6000 0.48 0.17 1054 1800 -746 DRAINAGE POND CALCULATIONS Required grasry swale pond storage volume = Impervious Area x.5 in./ 12 inJft. = 464 cu. ft. Grassy swale pond volume provided = 469 DRYWELL REQUIREMENTS - 10 YEAR DESIGN STORM Maximum storage required by Bowstring = 386 cu. ft. Number and type of Drywells Required = 1 Single 0 Double - TIlVffi OF C+JNCENTRATI(7N (minutes) Tc (oVerland) Tc (gutter) Gt = 4.15 L?= 160 Z1= 0.16 L 1(A) = 50 22 = 50 N(A) = 04 $ = 0 5(A) = 0.02 n = 0.016 s = 0.0335 T'c (A) _ 2.93 d= 0.13 L P(B) = 4 Tc (guu) = 0.98 N(B) = 0 Tc(A+B) _ 2.93 S(B) _ 0 Tc(tat. ) = 5.00 Tc (B) = 0.0 Intensity = 3 18 Areas l•C" A*C A 9 0.42459787 `7V1' = 6.6474 0.26 0.90 4.234 R = 0.0637 0.42 0.30 0.126 v = ?.ai 0.00 0.40 4 Tc(gu) ~ 0.98 0.00 0.04 d Q(est) = 1.14 Q.(]4 0.00 0.00 0.00 0 TIalding = 5.70 0.00 0,00 0 Total A Comp "C" D.b$ 0.53 Q-G*T*A= 1.14 Q(est.) = 1.14 Tc (total) = Tc (oVerland) + Tc (gutter) Tc ([rverland} _ Ct*(T.l*NfS^0.5)^0.G} Ct = 0.15 L 1=Lengthh o£ Qverland F1Qw N= friction factor ofoverland flaw (.4 far average grass caver) S= average sIope of overland flow TC (glitCeP) = r.eI1gLh (ft.)Neloclty (ft./5ec.)/60 B - Bottam wrdth of gutter ar ditch Area = d*B+d^2I2*(2 I +22) Z1 = iEYVBi'Se of CZ'o55 SlC3pe C1rie qf dl[Ch Z2 = inverse of crass slope two of ditch d= dept.h of flaw in gutter (estiinate, check estmte with Flow) Wetted paimeter =B *d+{ l lsin(atn(11Z 1))+1lsin(atn( P 1Z2))) Hydraulic R,adius = R = Area1VL+'ertei Perrimeter Velr,xiry = 1.4861n*R^.667*s^.5 Flaw = Velocity*tlrea n= 0.0 16 for aspt►alc s- Zongitudinal sIope of guttex B(7WST"RING METHaF] (7EN YEAR STORNI DESIGN) PItf)3ECT: V. PINES I3ETENTTON HASIIV DESI~'rN BASIN: BASIN-F REVIEWER: CiSM NUNISER [)F DIZYWELLS PRC]POSED DATE: 10-f]ct-97 U Sing,ls (type 4 1 Daubke (rype B) 'TQtaI Area (calc.) (see HI) 1.21 Time of Canc. (calc. ) (see H1) 6.06 Ctxmposite "C" (calc.) {see H1) 0.34 Time of Canc. (min) 6.06 Area {Acres} 1.21 C' Factor 0.34 Asphait Area (sci. ft.) 4148 Valwiae Pravidad 352 fhrtflaw (cfs) I Ar+ea * C" Factor 0.42 41 #2 #3 #4 95 #6 #7 Tinie Time Intensiry Q dei+. V in rV out Storage Inc. Ine. (min.) {see.} (iu./hr.) {cfs) (cu. flt.) {cu. ft.) (cu. ft.) {91 *60} (A*C*#3) (Qut£ *#2) {#546} 5,06 363.51 2.98 1.24 606 363.51 242 5 3o0 3.18 1.33 533 300 233 10 640 2.24 0.93 €76 600 76 15 904 1,77 0.74 756 900 -144 20 1200 1.45 0.60 800 1200 -406 25 150(] 1.21 4.50 819 1500 -681 30 1806 1.04 0.43 834 1800 -966 35 3104 0.91 0.38 844 2100 -1256 40 2400 0.82 0.34 863 2440 -1537 45 2700 0.74 0.31 871 2700 -1829 50 300(] 0.68 0.28 886 3000 -2114 55 3340 0.64 0.27 914 3300 -2386 60 3600 0.61 0.25 947 3600 -2653 65 3900 0.60 0.25 1007 3900 -2893 70 4200 0.58 0.24 1045 4200 -3154 75 4504 0.56 0.23 1080 4500 -3420 SQ 4804 0.53 0.22 1088 4800 -3712 85 5100 0,52 0.22 1133 5160 -3967 94 5400 0.50 0.71 1152 5400 -4248 95 5700 0.49 0.20 1190 5740 -4510 lOD 6000 0,48 (],20 1225 f(l(la -4774 DR.AI1uAGE FOND CALC[TLATT[3N5 Itequired grassy swale pond storage vnlume = Impervioaas Area x.5 in.l 12 in.Aft. = 173 cu. ft. Grassy swale pond volume provided = 176 7ItYWELL REQUIREMENTS - 10 YEAR DESIGN 5TC]RM Maxirnum storage required by $owstring ~ 242 cu. ft. Number and type a£ I]rywells Requireci = 0 S ingle 1 Dauble TR%iE f]F CQNCENTTdATTC3N (minuces) Tc (overland) Tc (gutter) Ct = 0.15 L2= 334 Z1= 0.16 Li(A) = 50 Z2 = 50 N(A) = 0.4 B = D S(A) = 0.02 n = 0.0l6 s = 0.01 Tc (A) = 2.93 d = 0.17 L 1(B) = 0 Tc (gu) = 3.13 N(B) = 0 Tc(A,+B) = 2.93 S(B) = fl ac(tot.) _ 6.06 Ti c (B) = 0.0 Tntensity ~ 2.98 Areas „C" A*C A = 0.70365075 WP = 8.54&3 0.99 0.94 0.081 R = 0.0823 1.12 0.30 4.336 V= 1.75 0.00 0.00 6 Tc(gu) = 3.13 0.00 0.00 a Q(est) = 1.24 0.00 0.00 0 0.00 0.00 Haldi.ng = 11.75 O.0f} 0.00 0 Tocal A Comp "C" 1.21 0.34 Q=C*T*A= 1.24 Q(est.) = 1.24 Tc (totaI) = Tc (oVerland) + Tc (gutter) Tc (oVeriand) = (lt*(L l *NIS^0.5)"0-6) Ct ~ 0.15 L1 = LengUh of Qverland FPow N = friction factor of overland tlaw (.4 frrr average grass cover) S = average sTope af overland flavv Tc {gutter} = Length (ft.)I'Velocity (ft.lsec.)160 B _ Bottonn width of gaitter or ditch Area = d*$+dn2I2*{Z1+Z2} 21 = inverse of cross stvpe ane of ditch Z2 = uaverse of cross slcrpe twa of ditch d= depth nf flowF in gutter (estimate, check estimate with Flow) wetced perrimecer = a*d+(1rsin(am(1 /Z 1))+1 /sin(am(l Iz2))) Hydraulic Radius = R = AreafWetted Perimeter Ve1DCity= 1.485]n*R^.667*5".5 FTow = Velocity*.4Xea n= 0.0 16 for asphalt s=lon,gitudinal slope of guttei DRA1n1AC~E - z~8 ~4u~KEr►')EN-r S . . BAS~ nl q S Wa tE t1 ~ n~~~~~ I~^1PERviuuS A R~A • N~f+l -~~CUL- 0E- S AG. C yZ)C n-)( 4s Z~ ~ 3 ~$0. 8~ f4 ~~r~o PEae~ N~ P-D (s+a 1+45 - 2~~~) Czo) - z3Zo f-} z, ~~yw .tNN ~r .49e~e~8* 550 ~ 4-0+ Z ~'oFa I = y~~ SwA~ Aaip i2ta' D c SSo 4"58 z' ~ r Z, ~ SwPLE A(tEA PRov' D: I$. S' x ZS 4loL S f4 L ~ Sce lo+z Z4 a„ .l ZS ~ 61 xk ( sv)ALk q z I ►^+PEP_vr oUs A RE-A ~ PERRr'VE RoAD (s?A Z+6,1 - 4-+3Z)(Z~-' ) - 34Za f-~ v swQ Z£ ARE-A R.EO' v= 3g-Z-O - 7-85 f4 L lL 51.vALE A9EA PRo\/' b= IS,S' x(9' s ZqLf.S f f L Sec lofs L~ qnd Z-4) bl-c,k ~ swat.E A 3 ~n+V6Rvro~.s pKEq PERRiOE P-D (SfA 4 t 37- - 64ZS)(Z°" IZ-4'k AVE (sTA otco - (f4I•s,)6Zo') = z83r. 8 fv avE (srrA - 14W - o+00}(P0)(o.s ) = I o«o. oo f4 i -fo+a I = ~-(v9 Z ft ~ Sw.ALE AREA 2EQ'O ' -+(-iZ : 64 t lL swa 1a AR44 Paov'o _ z-4 ' x Z-1 - ~~C I1►I~JVs ~u~b ~.e ~vr/1 ) - ~ - - _ _ . - - ❑RAi OA ~ "7-0~ ' :~A4-cVLA-rlL'P1 S BA ~3 5w~L-E r3-f Pmpc,¢vzov3 pERRIN6 R~~.D (-~rr.a 3+.:55 -16+ zS)CZo') ~ 580~ -F4-r- SWRL-E AR6A FzC-*'o -5Sot=] ' 4S3 f+ z. 4 d Z, ~ 5W+ocs Q,2r=A PaOd'S ~ ~9-x 410 f+Z-,-* ~ Jh a,„+Q5 [uF,& 12F-TNftn1 A RC A QRJ4 WA C.E Z[78 CRI-CVlA T5 '5w,aLF C- ~ ~ CQL-5A c. 0j't)Crr)(45~~ = 3181 F#~ P£~Q I r4t rUAr~ Tq - 3+ 35Y~~ Y 3$av ~-t- z' ~~~WW fo ~-~d - fag8 t f-F ~ [nNN~❑r u~~~~t75] SwaL-6 R RGA R L::,u' b = ~,9 8 r r 5$z f'+ ~ [ Z- ~ SINpL-6 AK&-A PedvI7 xz~o' r ~ ,4~ ~ ~ !a'1 l N V~ '~+.J+r ~7 ~"C.~'1JfIV C.{~GL ~ F1RE A 134 A U6o1LE (5'"fA G+'oo SwA LE~ A KiEp R604.Q = 7/~00 _ Z[~ i `z.r ~ SWALf 4$zE7Q pRp1J'D X 1~7 r c z'L5 'L SWALE C° -3 . impEpWiAVs ~P-,Eda 13+ k Av6~lu6 C57 A I+ 3a - Z4-14.(o0 )CZx71 zr3<I t -F-¢~ CLeL~-D;- -~4 d:~- rr~t~5~-} 3(SR F-+` 39ao f~Z 4a +tkk ~ q`l-+3 f4z.. SwAuc- A~~ RC-Q',D ~ Rq-q3 631 I Z- 5wac~ AetA PizaU'a ~ 3c Y. ~4 4 ~;t Il'►fN~S ~r6 ,-,~f,,ern Ct~~ ~ _ - ' Deo ►~~6,9 zloa le Ec~ I 0-f- mr. tj-rs 5u►AL6 D f n~ID, I r4PE Q V, c~~ A RE A ~ i,u7~F5 9 1/~ q,.. ~y '7~r~~ C y µri"qq G.LAOta Y T L r l3 AV~J ~ ~ ~ pvE~S} ui~ s~ ~+a jemae ' SW Auc- AR&A F C-G7' D ZZOO f4lL L f 7.- ~ $wALE peCV hDED = !Qr 3'- Zar r Zoo F4 L ~ 5~-e- L~~~ ~ a,,d b1Q~L ~ '5'w~~E P7-- - - 1~ ~~VinuS A~~~ - WNrPP[.~r AVE (arA 3+40 - 4*23.0) }(7►a' ) j!c ~o -~4~ ~ 166 9~ f 4 I 3*~° pvE,~uk ~(5fA 14 10 c ~t-5~ •r~~C'~a`~ = $`9 32 SWA1.E, A ieF_,R j2r,*'d ~ ! C? 5 9Z. f-4' L' ~ 17, . 45w,4Le Pitovioc-D ;Bo' x -30 _ `JOC) -~f ~ see. [.c+s z i pRA 10A6E - "ZP6 ~RE0Ur9-EfnEni-rS 5 05 1n! S WAL-F_ E - ~ 'i3~33 #~~5~~ 1M PERv~ovs A QE A '~uru~iao CUl.- DE -SAC- -/7..) ( R)(45) Z ~ 31V 1 f4L R061E c,xjg-r (s-rQ 1+4s 3100 f♦ L 'ss?s~ a -+o+a 1 - ~0 8 t f4 L ~ ~ ~ SWpL-`- AREA 2FB'D 59 01~"4 L r Z_ swAL.)-C aREIQ Peov' D - Z<c , x ZIo, = 59o f f z (7F /pIMUS cV,b r~.}wr1 qr-C,A ~ SwALf E-Z. //►1PE2Vlovs ARLcA 134k AvENUE (-5rA Z+44.coo - 4 fZZ• Z'-} ~ 13+k AVEtiu6 (s-rA Q+ ZZ. 8(P - 5+ SG-C,o )(Zv Ztv -~S -P +o-Fa L = 5~ 4 0 -F4 z' sw,aLE ,aRFA REd'p sL4o f4t' ^ 4";fO 17~_ swALE AR64 Peov'v = zi k ZZ' = 484 Swac.E `c - 3 /MPERviouS AREA CUI.-DE 'SflC ~1/L) ( TT )(45)L r 31$1 Ri WN)PPC£ AR, (5,i"A 1 t 45 - 3+¢o) (Zo' 3c]Lx) -F4 Z I08 / f+ L swac.E A96A PeQ' -1 =408 / ffz = S`j o~+ Z' 1Z 15w4LE AREA PKcv'O ~ 30." XZ3'- ~vo4 ftz M wu 5 G✓-b re+wn q,-" ~ swA~-~ F - ~ I+.ApERV+ov5 ,v QEA _ t~z(?T) (4~~~- - 318 r f4 ~ 4 c~4e ~Pi~ rcpj C~a r+ 4s - ~ 4Z ~c z~• 3 - 5 sGo f $ 4 41 .F.F ~ ~ ~ swAcE t~RSQ eEG'D - 13~ 4 ~ 'F+~- ~ 4 7-13 jp-+ ~ ~ ~ pptv FD x 3o' - IFf ~ see fn~s 4 O.J, Sr Srock-- ~ 8As l n] SWRCF- 6-1 I rnPE mv awS AP-EA wNIPPU RaPR (srA f jo f # z~ iZ+k ,Av&Ju6 (s-rA 6,4 9 8•1°I ~ ~s~s.8520' Z4E3 -R t = ip SS 3 F4 ~ s wAc.I-c ,aRzA eE&' b ~,s 5 a _ 5 gG ~F+ ~ [Z-1 5WAC.E fiR6/~ P02o U' D Z-ro ' x 7,4 ~ s r 5 ctQ f f z- , -kr fA.Wu5 Cvrb r"t4t,+rty ~ 12R►oun]A61E - "2-013" RErul9ej+1ErJrtS 13a5+~ H -5w Azf= } ~7ao'~ - ~ 3`~• gC7 r,OJItIPPt.~ p ~ (S-rA 4+z2,0+ - ~ t310 ~~~-s l~~' AVENU~ (~~a 34 4~t Y e9 NO1 ~~JCL~7W Y • ~~~r = r ~ , z 3 . ~ o ~ SWaLIE ARE-A JZcdtD = [ 1t z.3~4 -50 ff ~ ! Z. ~ . Sw4c.~ Pr~A P►~.' D 3 Z k 3 Z.' 38 # (AI►NUs cuga gE7V19►J A~~ ) Lo-~ . -SwA L-6 ~ 1,7," Au6m)i 1-+*1,s9 - 3+~~)(zl_') - +8. Z, sR ~4 5w~~~ RLco'v ~ 4148 S 3~~ f+ z' t~ 5WaLE ataCq PRno~D -c [6k z-z. ~t7-'- 5~e L~t 7- ~ - NAIOR&e POP►D Va+_umE cALcu[.ATIO,,.r5 5'WAC.f A -t ~ (rg.s' ~c Z -5'ya-5` .+eP+k ~ 9 7-3r. z5 -~43 (15,5' x I ' ~ f4~, Z5 f+ rurar.6 ,~-e ° ' a~~~~. ~ ~s C r ~cr"'IQ~.~ A -3 ~ C T' k G~• ~ 1. t~' CF'er~ ~71 ~ ~ L6 1 ~ Ti i3 • +w¢a 1 prov+d = [o zr • 15 wA [ -f~ pc- A -+o+,LI res• d j 9`+Z f*3 . 5wA L~ 0 d~-p+k 490 IF4 3 C~} -~~^a l pr6V'd _ 4,9-0 43 wt A d-~4s! e h 40#6~ cl 5WA LE c- i A z(.' )(o. s' 1. p+ d. 7-9 5 Ff 3 -3w,4Gs c-- -Z--. }~0.5 ° dcp+k) - 11 z. :5 -4 3 1. 0" d~P4 k ~ - $ ~'t ~4 -1 +04a 4 prov'd ^ dZS! ~ ~ F+3 wt I -typr- S $a foi I06,s {+3 gA-,rQ " D SwAt.,6 D- l ' ~ lv' K zv' 0•'S ~ ~r- p 4 1. ~ ~ [f?o ~f 3 SWAc.,F- D- .+L 30' I•0 de{►tk 3 - 40+.a laao ;74 ~ w~` f ~yp~ A d~we ❑Rai,-JA6€ - Foriv VOLuME CALc~~A-rio,~5 , op'rjil`Y j 15r1 :5waLE - I' C z(,` ac ZG' )C0-5` c+vp+4 } - L9!5 f+ 3 SWALE ~ - t zZ' x ZZ' Y 0. 5' d,ep+i'. ~ - z4Z 3 I~3a3~s 1. oy cje p4 k ~ g 99 5 ~.A G - -64-.0 ~o►~~d - ~~41 ;"il w/ I 4,t c ~ ww~tiW ~ pe- a ~t +0 fm ~ Ffa51n} ~ SWAL.C G' J+ep4k } - 4450 ;+71 [ 4-a~,a pov'c1 c +ypt. A deiwedl ~ rvs'-t (~oZR f# deP f1, .5 9❑ 4-a4-et I p roV'.A r 5c?o f+ 3 W'~ I p C 4a 4,a1 Bp's Ij sw►~~E 14 3-L x 3z]C ~~~'dc~~~ ~ - 138 f# 3 f~+,kc = 938 cvr d +1pe- ~ af~~1d fa+.* 1 rroo'c! = 38(~ ~ ga~lrj ~WALf X Z-7-+ )C1-0 dep-~k ~ - 3,5Z F+ 3 -~a~al p.~~►'~ ~ 35Z Ty`tZ f43 CT]RB T3RflP CALCi3LATIC1NS A 1 - Sta 2+61 Perrine RQad 'I'op af Curb Elevation = 2060.25 +Gutter Elevation = 2079.75 :`208"'Floor Elevation = 2059.08 Gutter Slvpe = 1 51'% Area of Ba,sin = 2 19 acres Area to In1et = 0.73 acres Percent Area = 33°10 ~ (Qtotal)*(Percent) q _ 2 50 x 0 33 g 0.825 3J8 d = [(nx q) 1 {4 56 x Z x 45a} ] 31$ d _ a 0 14 x 0.825 0,56 x 30 Y 40.0151 a d = 0. 12 Capacitv 1 ft =0 075 { See Figure 16 ) Tength Req~d ~0 5251 O.475 = 1 100 ft Therefore: Use dm (3) cuxb drops at 4'-0„ A2 - Sta 4+32 Perrine Road Top o£Curb Elevation = 205786 Gutter Elevation = 205736 :`208" Floor Elevation = 2056.59 Gutter Slope = 1.05% Area of Basin = 2.13 acres Area to Wet = 0.46 acres Percent Area = 21°/0 Affectec£ Q (Qtotal)*(Percen#) q = 2.50 x 0.21 = 0.525 318 d=[(n nq) 1(0 SCx Z x4So) 1 318 d = [ (0.014x0.525~1(0.56x 50 x 40 0106} d=0,11 Capacity fft_0.m7 ( See Figrare 16 } Length Req'd = 0.5251 0 07 ="7 50 ft ~ Tlerefvre: Use ffiree {3} ceub drops at 2'-6" A3 - Sta 5+85 Perrine Road Top of Curb Elevation = 2056.23 Gutter Elevation = 2055.73 "208" Floor Elevation = 2054.56 Low Point Flow to Inlet = 2.50 c.f.s. Capacity / ft= 0.37 ( See Figure 17 ) Length Req'd = 2.50 / 0.37 = 6.75 ft Therefore: Use three (3) curb drops at 2'-3" B 1- Sta 5+85 Perrine Road Top of Curb Elevation = 2056.23 Gutter Elevation = 2055.73 "208" Floor Elevation = 2054.56 Low Point Flow to Inlet = 0.83 c.f.s. Capacity / ft= 0.37 ( See Figure 17 ) Length Req'd = 0.83 1 0.37 = 2.24 ft Therefore: Use one (1) curb drop at 27-3" C 1- Staa 2+95 Pemne Road Tvp nf Curb Elevation = 2{]59.73 Gutter Elevation = 2059,23 ;:208" FIoor Elevation = 205856 Gutter S iope = 1 51 % Ar+ea of Basin = 2.33 acsess Area to Inlet = Ll 84 acres Perreatt Area = 36°I6 Affected q = (Qtotal)*(Percent) q= 2.$3 Y0.36 = 1019 31$ d = [(nxq) 1 ~0.56 x Z x 4Sv} ] 3f8 d = [ (4014Y1.019)1{O.S6 x 50 x 40 41151] d=0.i3 Capaciiv 1 ft= Q 49 ( See Figuse 16 ) L.ength Req'd = 10 14 f 0.09 = 11.3 2 ft Thercfore: Use fhre.e (3) curh drvps at 4'-0" C2 - Sta 1+30 13th A►renue T'crp af Curb Elevation _ 2057.36 Gutter Elev=an = 2056.86 "20$" Floor EIevauvn ~ 2056 19 Gutter Slope = 1.00°l0 Axea qf Basin = 2.33 acres Area to liiet = (].30 acres Percent Area = 13% Aff-eeted Q (Qtatal)*(Percent) q = 233x 0 13 = 4.303 318 d = C(nxq) 1 (0 56x Z x 4So) ] 318 d = ~ {0.014x0303}I~0 Sbx 50 x 44.0100] d = 0.09 Capaciiy 1 ft = 006 { See Figure 16 } Leng#i Req'd = 0.303 J 0.[76 - 5.05 ft There£ore: CTse two (2) curb d.rops at 2'-9" C3 - Sta 3+02 Robie Court " Top of Curb Elevation = 2055.97 Gutter Elevation = 2055.47 "208" Floor Elevation = 2054.30 Low Point Flow to Inlet = 2.83 c.f.s. Capacity / ft= 0.37 ( See Figure 17 ) Length Req'd = 2.83 / 0.37 = 7.65 R Therefore: Use two (2) curb drop at 4'-0" D 1- Sta 1+30 13th Avenue Top of Curb Elevation = 2057.36 Gutter Elevation = 2056.86 "208" Floor Elevation = 2056.19 Gutter Slope = 1.00% Area of Basin = 1.17 acres Area to Inlet = 0.20 acres Percent Area = 17% Affected Q (Qtotal)*(Percent) q = 1.47x 0.17 = 0.250 3/8 d = [(nxq) / (0.56x Z x 4So) ] 3/8 d = ( (0.014s0.250(056x 50 :c 40.0100) d = 0.08 Capacity / ft= 0.0575 ( See Figure 16 ) Length Req'd = 0.250 / 0.0575 = 4.35 ft Therefore: Use rivo (2) curb drops at 2'-3" D2 - Sta 4+22 13th Avenue Top of Curb Elevation = 2054.57 Gutter Elevation = 2054.07 "208" Floor Elevation = 2052.90 Low Po►nt Flow to Inlet = 1.47 c.f.s. Capacity / ft= 0.37 ( See Figure 17 ) Length Req'd = 1.47 / 0.37 = 3.97 ft Therefore: Use one (1) cwb drop at 4'-0" E1 - Sta 3+15 13th Avenue Top of Curb Elevation = 2055.52 Gutter Elevation = 2055.02 "208" Floor Elevation = 2054.35 Gutter Slope = 1.00% Area of Basin = 1.17 acres Area to Inlet = 0.42 acres Percent Area = 36% Affected Q (Qtotal)#(Percent) q = 3.06x 0.36 = 1.102 3/8 d = [(nxq) / (0.56s Z x 4So) ] 3/8 d = [ (0.014Y 1.102)/(0.56s 50 Y q0.0100) d=0.14 Capacity / ft= 0.09 ( See Figure 16 ) 1ength Req'd = 1.102 / 0.09 = 12.24 ft Therefore: Use three (3) curb drops at 4'-3" E2 - S#a 4+22 13th Avenue 'Fop of Curh E1evataon = 2454.57 Gutter ETevatian = 2454.07 "208" Floor Elevation = 2[]52.90 Low Pt7inR Area of Basin = 2.43 acres ed►Fed iL1 II1l2t _ 1.55 1G1`e5 Percent Area = 64°Iq Affected Q (Qtotai)*(percent) q ~ 3.06 x 0.64 - 1.96 Flvw to In1et = 1.96 c f:s. Capacity 1ft = 0.37 ( See Figure 17 ) Length Req'd = 1 96 1 0.37 = 5.30 ft ThereFvre: Use two (2) curb drops aat 2,-9" E3 - Sta 2+87 Whipple Road Top of Curb Elevation = 2056.73 Gutter Elev atian = 205 f.23 "24$" Floor Elevation = 2055.06 LesW Point ,AFea of Basin - 2.43 acres Area te Wet = 0.87 aeres Percent Area = 36% AffecW Q {Qtotal}*(Percent) q=30fx(]36= 1.10 Flow to Inlet = 1 10 c. f.s. Capacity 1ft= U 37 [ See FFgure 17 ) Length Req'd = I.10 10.37 = 297 ft Iherefore Use vate (1) cuz'b dtop at 3'-0" ~ Fl - Sta 2+90 Whipppe Road Top af Curb Elevation ~ 2056 75 Gutter Elevation = 2056.25 "208" Flcxir Elevation = 2055.0$ L,caw Paint Ftow to Inlet = 1.61 c. f.s. Capacrty 1 ft= 0.37 [ 5ee Figure 17 } Lengt1a Req'd = 1.61 1 0.37 =4.35 ft Therefare• Use twv (2) curh drvps at 2'_3„ f,i 1- Sta 5+85 Wh,ipple Road Top Qf Gur}a Elevation = 2053.68 Guttter Elevation - 2053.18 "208" Floar Elevation = 2452.01 Gutter 510pe = 3 35°/0 Area of Basin = 0.57 acres Area ta In1et = 0.57 acres Percent Area = 100% Affected Q (Qtatal)*(Perc.ent) q = 0 83 .c 100 = 0.83 318 d = ~{nXq} J (0.56 x Z x 4Sa) ] 3J8 d = ( (0.014x 4.83}!(0 SSx 50 x 4(10335} d=0.la Capacity 1ft_ 0 0675 { See Figure 16 ) - I.ength Req'd =O.831 0 09 = 9 22 ft Therefare; Use three (3) curb drops at 3'-3°, 1 Hla - Sta 5+85 Whipple Road Top of Curb Elevaiion = 205368 Gutter Elevation = 2053.1$ "208" Floor Elevation = 2451.83 Gutter Siope = 3 35°/a Area of Basux = 0.68 acres Area to Inlet = 4.25 acres Percent Area = 37% Affected Q (Qtvtal)*(Percent) q = 1.14 x 0 37 = 0 422 318 d = [(nxy) 1 (056x Z x 4So) 1 3I8 d = C (0014xO422)/(0.56x 50 x 400335) d =o0s Capacity 1 ft = fl 0525 ( See Figure 16 ) Length Req'd = 0.42210.0525 = 8 04 fG Therefore Use fihree (3) caerb drops at 2,-9" H 1 b- STa 6+60 12th Avenue Tap Qf {Curb Elevanon = 2053 50 Ciutter Eleirativn = 205300 "ZQS" Floor ElevataDn = 2051.83 eriitter Slope = 1.00% Area of Basin _ 6$ aeres A.rea to In1et = 0,43 acres Pereent Area = 63°!0 Aff'ected Q (Qtotal)*(Perc,erit) q= 1.14x0.63=0.72 318 d _ [(nxq) 1 (0.55x Z x 4Sa) ] 318 a = [ (0.014x0.72)/(0.56x s~ x qOOIaO) d = 0.12 Capacity 1 R= 0.07 ( See ,Figure 16 ) Tength Req'd = 0.72 10.47 = 10.28 ft Therefbre• Clse three (3) curb drops at V-6" ] 1- 5ta 3+49 12th Auenue Tvp of Curb EIevation = 2055 84 Gutter Elevatian = 2055 34 "208" Floor Elevation = 2054 17 Gutter Slage = 1.00% Area of Basir► = 1.21 acres Area to Inlet = 1.21 acre-s Peaceaat Area = d [10% AffecTe.d Q (Qtatal)*(Percent) q= i 24 x 1.00 = 1 24 318 d = [{nxq} I (fi}Sbx Z x qSo) ] 31$ d = [ (0 014x 124}I(0.56 x 50 x 40.0100~ cf = f}.1 S Capacity 1 ft= Q. 10 (See Figure P f) d,e,s~ h Req'd ~ 1.Z41 0 10 = 12.40 ft Therefore: [1se three (3) curb drops at 4'-3" pEP7H OF FLDIN - y- FEET ~.a 01 oa .os aa os .as .os .10 .a a s e .T a s 1.0 ; i I ; I 6 { V ~ j ; ~ ~ s - ~ ~ ~4- ~ ~-I`t- I~r ~ ~ ~ 4 1 1 ~ ~ i iI I I ev I I , ~ I I~17 .06 ~ ❑s .oa ! , , $ i- ~-L rT4 9 ~ oz ~ j-j- ~ . ~.n [ o ) D15CFipRGE PE'R F(?OT OF LENGTH OF CURF3 DPENING ~+o 4 --t ~ iNL'~TS WF~EN iNTERCEPT1NG 100°fo OF GICJTTER FLvVV _ ~ t I 1 I I , ~ I 1 ❑ ~ (b) PARTIAL INTERCEPTION 3 _ G.. - • - ~ - ~ ---1- RATla FOR lNLETS OF I ~o`' •'f ~ ~ ~ --1 -4- - a LENGTH L E55 THAN La r z~ ~ ~~,~.~-,---~~•~-sm 05 .06 .08 .14 .2 .3 a 5 6 .e i p L/Lci CAPACITY 4F CL1RB OPENkNG IEVLETS O6V CaNT'gNUOUS GRADE 6-39 F1GURE 16 i.o i z a to ii 4 •9 8 3 10 6 .B 2 g 4 . .7 ~ . li . 8 F r ~S LL. ~ 7.S ~ 2 Z . .6 0 . O i~ 7 li ~ cr 6.5 a L 1.0 / t s e ~ i.o , 0~ 25 v 9 i ' u- s Z Z -.e 2 ' 75.5 -.7 W 5 J , L O .a v . ~ p.3g ' ~ w • o o -.e w a.s ~ LL. Z ? 0 W .s ° a 2 - ` 2 O o • ~ r~ - .3 Z 3. 5 -.4 2 i = Z • , a ~ w ~ a 0 W .oe o . ~ 25 ~ 3 W .06 a -.3 = O cr 2 1-- w w O _ .o0 x.s ~ 3 Zs .2 W O LL. a = . • F- .2 r .02 - a E- w U a 2 a " Q o U ~ .IS pl~ .15 F- C . ~ ~ cr L ~ _ ~ r....- • w.. . ° = . • N T. L H CURB LS • ~ ~ ~ ~ t 0.1 ~ LOCAL DEPRESSION (o) > z ~ a •1 1.2 NOMOGRAPH FOR CAPACITY OF CURB OPENING INLETS AT LOW POINTS BUREAU OF PUBIIC ROAOS DIVISION TWO, WASHINGTON, D.C. FIGURE 17 6-41 - 5rwale Nv ~ Road ~ 5cation ~ TQp 4f Curh ~ Width A-t ~ P~~~~ Road ~ 2+61 ~ 206025 ~ 3@ 4_-0_, A-2 I Perrine Roatt ~ 4+32 I 205786 I 3@ 2'-6„ A-3 I gemne Rnad s+as _ I 2056.23 ~ 3@ 2'-3„ B-l ~ Pera-ine Road 5+$5 ~ 2056.23 ~ 1 @ 2'_3„ C-1 i Perrine Road I 2f95 I 2059.73 I 3 @ 4,-0„ c=z ~13~ Avenue ~ 1+30 ~ 2057.36 ~ z@ 2'-9== c-3 ~ uabie court 3+02 2055.-97 ~ z@ V-0„ D-I 13th AVenue I 1+30 2057 36 I 2 @ 2'-3„ D-2 I 13th Avenue ~ 4+22 I 2054.57 ~ 1@ 4'-0,. E-1 I 13tte Avenue ~ 3+15 ~ 2055.52 I 3@, 4'-3" E-2 ~ 13th Avenue I 4+22 ~ 205457 I 2@ 2'-9„ E-3 Viuppie Road 2+87 I 2056.73 I I@ 3'-O'= F-i ~ VG'hiPle Road 2+90 ~ 2056 75 2 @ 2,-3,= G-1 I WPupple RGad I 5+85 ~ - 2053.6$ I 3 Qa 3'-3 H-1a W'hipple Road I 5+85 I 2053 f8 I 3@ 2'_9„ *H-lb lZth Avenue ~ 6+50 I 2053.50 ~ 2 @ 4'-0" ~ *i-i ~ 12t, Avenue 3+40 ~ 2055.84 ~ 3 @ 4'.0" ~ *Indieates Type 1 sidewatk Irilet strucwn CURS 13RC)p TABLE Swale No. I R..oazd. ~ Statinn ~ Top of Curb I Width A-P I Pemne Raad I 2+6I I 206025 ~ 3@4'-01° A-2 Perrine Road I 4+32 I 2057 8G I 3@ 2,-6" A-3 I Perrine Road I 5f85 205623 I 3 @ 2'-3=, B-I I Pemne Road ~ 5}85 2055 23 ~ 1@ 2'-3" C-1 I Perrtne Rpad I 2*95 I 2059 73 I 3@ 4=-[7=, C-2 ~ T 3th Avenue I 1+30 I 205736 I 2',7a 2'-9:, G-3 ~ Rotsie CourE 3+02 I 2055.97 I 2@4'-0„ D-1 I 13th Avenue 1+30 ~ 205736 ~ 2 @ 2'-3" r]-2 I 13th Avenue I 4+22 I 205457 ~ 1@ 4,-0„ E-1 ~ 13th Avenue I 3+15 I 2055.52 I 3 rr 4'-3" E-2 ~ 13th AWenue I 4+22 I 205457 I 2 @ 2,_9„ E-3 I Whipple Road ~ 2t87 ~ 205673 ~ 1 @ 3'-0" F-I ~ Whipple Road ~ 2+90 ~ 205675 2 @ 2'-3" G-P ~ Whipple Road I 5+85 I 2053 68 I 3@ 3'-3„ H-la ~ Whipple Road ~ 5+$5 I 2053.68 3@ 2'-9" *H-lb I 12th Avenue ~ 6+$0 2053 50 2@4,-0" *T-1 I 12th Avenue I 3+40 2055.84 ~ 3@ 4'-[]" *Indicates Type 1 5adewalk Tnlet Stxucture DRYWELL TABLE Offset LftJRt T Rim lev Swale No. Road Name Station YPe . . A-3 Perrine 5+80 32' Left B 2055.23 B-1 I Perrine ~ 5+80 ~ 32' I Right I A I 2055.23 C-3 13th 2+35 28' Right B 2054.97 . D-2 13[h =~+45 28' Left A 2053.~7 E-2 13th 4+10 28' Right B 2053.57 , E-3 I Whipple ~ 3+00 I 28' I Left I A I 2055.73 F-1 Wtupple - 2+80 28~............... ..~~t .l A 2055.75 G_.1............ ,........~PPIe ----------•5+90 ...-------.....30' ....Right.... ......---......A...................-2050.68..... H..................... pp 5+90 -1 Whi le 30 Left A 52.S0. J-1 I 12th ~ 3+30 I 32' 1 Right I B I 2054.84 M ~ ~ A. mdorD Wo, ?M S I71'VISION S7F ENCIIVEEItSNC AND 130AD5 A I3FV[S[C7N OF I"FfE L'U$LIC WC1ldKs DES'A.lZ7'MP[VT Wili,am A Johns, P E,Caunty Engmeer DBGEICIb$I' 14, 1999 Randell G. Hahrt, P.E. Hahn Engineering, Inc. 8623 N. Divisior►, Ste. B 5pokane, WA 99208 Re: Techrucal Review o£Valley Pines Subdivision (PE-1737) Randy, We haVe receiyed the fvllowing subrruttals dated Nvvember 23, 1999- 1. Rvad Section Tnformation 2. `208' Lot Plans 3 Revised ltaad 8i Stvrm Drainage P1ans The abave submittals satisfy the autstanding rninimum submittal requirements as stated in Bill Hernn-tings letter tv yau dated Nvverziber 1, 1999 _ The Develvpment aervices department has perFormed a technical review of your cux`rent totai package with respect to the prelirninary plat canditions and tfie applicable Spokane Cvunty Cruidelines for Stormvater Mariagemerrt(GSM) and Standat•ds for Road crnd Se►ver Canstruclian(S1SC). The following issues need to be adequatery addressed and docurraent reuisions nnade, tv allow comptetion of the review and fina[ plan acceptance far construction and permitting: GradinLy & Temnvrarv Erosion ContrQl('I`EC) 1, No clearing and grading plan has been included far the aVerall plat property. My assumption is that the deveioper will want to strip and rough grade the property similar to that already done on the eastern third of the site 2. A TEC pla.n is required for site disturbances in excess of 1 acre. Standard erosion control caotes have been included vn the glans, but no actual temporary ervsion contrvl measures have been shvwrt vn the grading and drainage plan, and need tv be shawm. Starm tirainaize 1. The Drainage Report received on Dctober 24, 1999 has been reviewed for compliance with the `C~'rSM'. The fa1loAring additional requirernents are necesswy to demonstrate 1026 W, Broadway Aue e- $po]€ane, WA 99260-47170 9 (544) 477-3606 FAaC, (509) 324-3478 TL7L] (599) 324-3166 r a ' ' coFnplyaGnce with the current drainage standards ■ The tatal `208' swale areas, storage Volttmes, and drywell capacities prdvided appear adequate for the overa1 road basins. However, basins A, C, a.nd E contain swates withQUt drywelis which ac+erflow to end swales with drywells. The sub-basins far swales A1-A3, C1-C3, and E1-E2 need to be delineated and analyzed to see if the individuals swales haue adequate `208' treatment volume far the first l~Ia" vf runvff from the contributing sub-basins priar to oVerflmwing aut to ihe various gutters and drywells. 2. The recer►tly subntitted `208' Lot Plan configurations appear to be consistent with those shaum on the current raad and drainage plans, but are na longer consistent with the prelirrinaryy plat. The final plat map will need to be aunended to provide, • Matching horder or drainage easements for alI `208' swales. • 5tandard easement dedicativn and drainage language. Roads 1. The rnad geametries and sectivns are adequate with the exceptian af the pavement sections prapased. 2The recently submitted rvad sectian information presumes the vptimal USC svil type GW is present. The SC5 map scail type is Springda2e, (SxB) and cPassified GM ar Gp. You may assume the higher GF type, which requires a 7" graveh base atvp apprvved subgrade, not the 6" base propased. The G'VV class cannvt be. used withaut adequate sieVe analysis frvrn saanplings at t'he final subgrade elevatians, wPuch is a difficult and expensivc prvposixion The road standards say that you may use the paVement matrix ar AASHTC,) design methad for residential, local access streets. 3Raad monuments need to be prQVided at a.[t created intersections and road ends and their vffiets.(My count is a total vf lQ) The traffic sign plan is adeyuate, but the sign notes shc►uld reference the MUTCD nupnber & size for the stap signs and County Standard Pdan A-ld fvr the street name signs. T may be reached at 477-7257 regarding this letter vther engineering plat issues Sincerely, ~ Gary W. Nyberg, Plan Review Engineer cc: Bill Herrzmings gwnfgJengrsldevsrvcslcammlctaTTUnents:P-1737r2 doc WahCd &vyLmBBMVs giAC. ~ ~ ~ ■ A I S~ TE 8$623 DIVI5E~71V pE~*~~~ED ! SPaFCA1VE, WA 99208 FEB (5Dy9~) ~Ft67'1p5CO5Q ~ p~., ~,~00 C?IYTE~~✓ J~~f • • ~~~r ` C1 FAJ► (:70n7~) `?7'S189 '~4~(~" ~'+.O(J~3, T ENV ~ e4TTEMTIO C ~~~✓`[~cr iY I,YCEfI RE TO WE ARE SENE]IM1lG YOiLl~hed ❑ Linder separatQ tover via the follawing iterns: 7 [3 Shop drawings 0 Prints CI Sampfes ❑ Specificatfons 0{Copy Qf latter El Change order C7 COPIES D• r ■ ■ .,4414 ~'Z ~4 7HE5E ARE TRANSMfT"EEQ as checked below- ❑ For apprvval 0 Approved as submitted L7 Resubmit copies br approval ❑ For your use ❑ Apprvved as nated a Suhmit copies fnr distrihution > requested 11 Returned fcsr cvrrections ❑ Reh[rn corrected prints ❑ Far review and cQmmenT ❑ ❑ FDR Bf❑S f3UE 0 PRINTS RETURNE[] AFTER LClRfy TG US REMARKS ~ 4Ww&7~w ~4atV COPY TU SIGWE[J: , • ~ - RROoUCT 2aUr ff enclosures are rrnt a$ nvtad, klndly nvTffjr us of ance. ~ ~~w o6mgLitBEzbygi ~ttC. 8623 DNISIaN LETTER O • • ~IT ~ S , s~~KANE, wa 99208 (5~yvyA 9) Cas7-i55a, ~,~T~~~'.~~ i Fft (.709) 467'Oi49 ATl'ENTIDt~ ~ 'T° RE - - ~ r WE ARE SENDINO YOIJ E] Llnder separate caver via the tpllowi ms ~ , ~ Shap drawings 0 Prirats c7p~._,._ ❑ 5amples ❑ 5pecifrestions 0 Gapy vf Ietter F-I Change order El COPIES /ATE NO N O I I I,-) THESE ARE TRANSMfTI`EQ as cheC'ked belova- ❑ For approVal 0 Approved as submitted ❑ Resuhmit copies fvr appreval ❑ For yaur use 0 Approved as noted ❑ Submit copies for distnbutivrr ❑ As requested C7 Returned fvr corrections 0 Return carrected prints ~ Z~Ie~review and comment ❑ ❑ FOR BIDS [3LJE C} PR1NT5 RETURNED AFTER LQAN T[7 U5 EiEMAFIiCS , r• ~ t rIX Ir '70 4w - s ` AL P; Wir-W 41F ■ COPY TO NEo• ~ PROUrJCT 2a~T ~ nated; ~ ~ 7fEa/rn &ngineezing, 9ac. NORTH 8623 DIVISION OF TRANSM-ITTA -LETTER ~ SUITE B ~ SPOKANE, WA 99208 ' DATE°/ ~ I • LZ~ , , , ~ . ~ (509) 467-1550 ~ F (509) 467-8189 ATrENT10N ~ To RE: w'H qqa&o R=IGEIVE 6# , FE B 0 2 2000 C°0KAN€-ss1-'Wr.x.yr.lr,lNEE R WE ARE SENDING YOU t'Attached C Under separate cover via the tollowing items: > O Shop drawings ❑ Prints Plans ❑ Samples ❑ Specifications D Copy of letter CI Change order O COPIES .A • . • 2ai kM`yal nj THESE ARE TRANSMITTED as checked below: ❑ For approval ❑ Approved as submitted ❑ Resubmit copies for approval WFor your use ❑ Approved as noted ❑ Submit copies for distribution VAs requested O Retumed for corrections ❑ Return corrected prints > ;-F~orreview and comment ❑ ❑ FOR BIDS DUE ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS COPY TO SIGNED: ~ PRODUCT 240T /f enclosures are rtot as noted, klndty notify us at once. ,J . ` Hahn .~~'Zgineeri3~g, .~nc. Prafessiorzut Engineers and L,and 5xcrveyars I1forFF¢ 8623 l7avtsPcri 5treet • Str:te B 5pakrrrze, Washrrzgton 99208 (509) 467-I550 FAX (509} 467-8789 January 3, 2000 Mr. Gary W. IVyberg P1an Review Engineer Spokane County Public Works 1026 W. Braadway Ave. Spvkane, VVA 99260-0170 RE: VALLEY PINES T)ear Caary: This letter and the atfiached drawings should address the catnments (pertaining to the road plans oniy azad excludang the comrnents regardang the plai) receiwed by our affice on 12114191 regarding fihe alaove referenced project. 1) A Clearing amd Grading P1an as well as a Temporary Erosion Cantrol Plan are included with this submittal. 2) A basin map and Ghart can be found vn the following 2 pages. These 2 pages show that the delineated sub-}aasins A 1-A3, C 1-C3, and E 1 -E2 have adequate "2[]8" swale treatment areas fae dhe individual sub-basins. 3} The 6-irrch gravel base caurse shown an the crass-section detail for the propQSed raads was revased ta reflect a proposed 7-inch gravel base course. 4} The sign notes were revised to call vut the type af stop signs and street name signs that are required. If you have a.ny additianal comments ar questions, please feel Free to contact Fne. Very truly yOurs, , HAHN ENGINEERING, INC. Wade Cielhausen, EIT. 7 . , ValEey Pmes- Gary Nyberg Letterl 0 1104100 a The fallowing chart shaws the delineated sub-basins A 1-t13, C 1-C3, and E 1-E2 and tneir corresponding asphalt and swaale areas (also see Basin Map). ~ Basin Basia Asphalt Area {Sq Ft} ~ Basia Swale Area (Sq Ftf ~ A-l ~ 5501 ~ 462.5 4w. A-2 ~ 3420 ~ 285 ,~W,; A-3 ~ 7692 ~ 657 6, VI°. tt) ~ C-1 ~ 6981 ~ 590 .~7.2• 0 C-Z ~ 2600 ~ 225 ? 1 7~9 C-3 ~ 9973 ~ 844 931 e_2 E-1 ~ 7081 ~ 590 S'f ~I ~ £-2 ~ 564[~ C 484 ~f,7 0 74+ 7' ~ p (D 1'-- "S, r•r E C~ o u rv -r -r- $7IVi5fi?N [7F EIVGINEERINiG ARiB RQAL'15 A DIVISIC}N OF'FH8 ?CJFiLFC WORKS l3EFAFCPMENTT 1Nill:am A. ]ohns, P E, Covnty Enguteer T)eceanber 14, 1999 R.andell G. Ha}3n, P E. Hahn Engineering, Inc. 8623 N. Division, Ste. B Spokane, WA 99208 Re Technicat Reuiew of Valley Pines Subdivisian (PE-1737) Raandy, We have received the following submittals dated 1Vavember 23, 1999: 1. Road Sectivn Tnfarmation 2 `208' Lot P1ans ~ 3. Revised Road & Stvrrn ]3rainage Plans ' The abvve srabrnittais satisfy the ❑utstanding minimum submittal requirements as stated in aill Hernrnings letter to you dated Nowernber 1, 1939. The L7evelvpment Sensices departmerrt has perFormed a technical review of your current tatal package with respect to the preliminary plat ConditiQns and the appiicable SpQkane Ccaunty Guidelrnes for StQrrrawater Management(G5M) and Standards far Road and Sever Constructron(SRSC). The failQwing issues need to be adequately addressed and document revisions mada, to allow completion of the review and final plan acceptance for emnstrzction and pernutfiing: Gradiniz & TernnQrarre Erasion ContralfTEC4 I No ciearing and grading plan has been included for the aVerall piat praperty. My assurnption is that the develaper wi11 want to strip and raugh grade the property ; similar ta that already done on the eastern third of the site. 2 A TEC pian is required fvr site disturbances in excess of 1 acre. Standard erosion cvntrol nates have been included vn tfie plans, but na actual temparary erosion control rneasures have been shown ❑n the grading and drainage plan, and need ta be shawn Stnrm Drainage 1. The Drainage Repart received on Uctvber 20, 1999 has been reviewed for campliance with the 'GSM'. The faltowing additianal requirements are necessary to demanstrate 1026 W. Srvadway Ave. ■ Spokane. WA 99250-0170 .(5[9} 477-3600 FAX. (509) 324-3478 'I'Dd. (509) 324-3I66 j compliance with the current drainage standards. •The total `208' swale areas, starage vcalume5, and dryaweil capacities provided appear adequate far the averall road basins, HvweWer, basins A, C, and E cantain swales without drywells which averflaw to end swales with drywelIs. The sub-trasins far swales A1-A3, C1-C3, and E 1-E2 need to be delineated and analyzed t❑ see if the irtdividuais swales have adequate `208' tteatment vQiume for the first '/z" ❑f runaff from the contributing sub-basins prioz ta averrflowing out tv the Various gutters and drywells 2. The recently subrrutted `208' Lat Plan canfiguratians appear tv be cansistent with thase shown an the current rvad and drainage pians, but are no longer cvnsistent with the preliminary p1at. The finai plat rrZap will need to be amended tca provide; • Matching border ar drainage easemenis for all `208' swales • 5tandard easernent dedication and drainage language Roads 1. The road geametrics and sections are adequate with the exception of the pavernent sections praposed. 2. The recently submitted raad section infQrmation presumes the optimal USC sail type GW is present TFae SGS map soil type is Springdale, (SarB) and classified GM or CP. Yvu may assume the higher GP type, which requires a 7" gravel base atap apprvVed subgrade, nvt the 6" base prvpased The GW class cannoC be used without adequate sieve anaiysis frvm samplings at the finai subgrade e1eVations, wlvch is a di$'icult and expensive praposition. The road standards say that you may use the pavernent matrix ar AASHT0 design method far residential, loeal access streets 3 Road manuments need to be pravided at a[I created intersections and raad ends and their offsets.(My crrunt is a total af 10) The traffic sign plan is adequate, but the sign notes shauld reference the MUTCT7 nurnber & size for the stop signs and County Staridard Alari A-16 far the street name signs I may be reached at 477-7257 regarding this letter other engineering plat issues Sincerely, W Gary W. Nyberg, Plart Review Engineer cc: Bi11 Heraimings gwn/gJengrsldevsrvcslcommlcamments•P-f 737r2 dac DRAINAGE REPORT FOR VALLEY PINES SUBDtVISION POR. OF SE 114, SEC. 21 T2SN, R44E. W.M. SPOKANE, `VV'A.SHTNGTON Prepared Fvr: LaRay Builders, L.L.C. . 12$ l 0ENara, St C Spvkane, WA 99 1 fi . ~ was G. ~ ~ 2e247E`~~ aIsTF-~'~' ~~roNAl. Prrepared By: ~ Hahn Engineering, Inc N 8623 Divisian St Ste# B Spokane,WA 99208 vpsub-doc PRfJJECT DE5G1tEMO11T The project knvwn as "Valley Pines Subdivisian°" is generafly Iocated South and adjacent to Tvvelfth Av e, appraxirnatley 500 feet Co the West of Pines rvad in the SE 114 quarter of sectivn 21, T25N, R44E, W.1Vd., Spokane County, Washington, "Valley Fines is situated an approximately 11.5 arces which wi11 be subdivided inta 371ots for single family dwellings. The soi1s in the area caf this project are Springdale gravelly sandy lvams ( S* B). The Springdale saits are pre- approved in spakane caunty for the use of dryweils. vpsub.doc sr,gl ~R~s% ~A ~ ~Orrnrv . .i~ ~ir ;'o ~\vo~ i• •`~~.!~N . z~ ~ A}CY"ER7 a€ft s'~•~'-_~' E° ~ ~ ; ; ~ . ` `''fffr:::`~~~ y1 ~ ~~-n I~~ ~ i , ' ~ . • ° ' ` r ■ ~ • ` ' VU Z d 0 ` 1~~_-- y:• r i~.' ~ S 51 . s• • ~+F ~ y~ i ^ ~ °tll{ ~P~ ~ j '.i l _'"'7 - 1 L_ I tl ~ ~ 9' . ` • ~ 1 --~~~-`~z~_-_ r ~ - ~ . ~ . _ . j,~ ~ i ~I~~~ ~f' •r1 - • ' • i ` :a = ~ I ~.fAL r ~OPrDw . _ ' . ~ ~ra•Isr ~ ~ I-•-d .~~i _ _ ~ 7ER~'4Tj d ~ PiL" . saga' i"'s~~~~M1 ' IiElil_ s F.~ w ~ ~f 1 ' c tanrEs ~ - - ' - p _ , ~ ~ • . . . ~Pa►k . ~ ~ ~ '~,..,l~ = _ ir n _ i'--'~:-•~~ i Npf~r k= • ~ ~ E y 4. e ~ .s 1~°11 202~ SpckaneValley . .,ve ~ ~ • - " , •-~IjHom-ft~ i A'~^~,:✓,='-~l:w~ I'•-_ y y' = ~ !~I ~ • 6 ~ _ • I i! - . II .1. . I rr"~ ~ ~ M1 _ ~ Sr ~ u . ti+• ~4-~~ ~.J . • 'w Yt ' ' ~ BfT6ME • , . 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' L : f ~ ~ ry ~ rq .,~.t , ?~t' q:~.c~~' ~,s+.a.i, ;~;r ~ 't~ i 4~ ' ~ ~T ~t ` S~ay'° ` ` ~y' ~ ~ ~~'S I~• ~ a~,a ~ . . ~ • -Z + ' ~ 4. i ~ y~ , ~ ~ . ~;s~ i - _ ~'s~1• ' 3 ~L ~dt'' ;F1'xr ~r~ ~ 1'~l 6:'i~'~• J'" 7h• ~;d + + F~.....-"~ _ t Y~`~, iij i ~;1~~ ° ,,-~~~~°~7~ d' Z ~4~#.1~'~ , n • ~e, 7~}~, ,I~iy i { , i ~ ~r~ :sg i• ~ _ if 'L{ d t~+~^ _ ~ ~ ~~Yd Y :3 ~ T~:s ~ ~a",'s; IQ ~ ~ ~ 1~:~ ~j$~~`~,~'~~~t~ ~ ~ ~ ~ _ ~ rra _ya~ _ , _ ~ ~a~. • ~,;Y' ~ ~ 7 `I ~ '~n:s~Y.~~~S, io °~~~s ~ Y~= I~~~~ •+~~'i ~ ~ , i,~, h, 1 ,'~'~`t'"', , • ' ' 4',~ ` ~ ~:,s' f , i ~,:s , ! ~ ~e' ~ y~ r~.E tl ' ~ r e~4~,~a,~ ~ ~r"~ ~ ~'k 1 , if~ ~ •p~ s~ 'A, • ~ F i ~ - ~ •}^~5.. ' ~ia_ i r•~~d~~l"~ pp '1` "~r ih 4 ¢!i1 ~ i• ~ ^ p ' ~ i ,~i ~ •r+ .1• ~e~ ~ ~`2 ~ ~~~y~~~ ~ >j 'C ii 6 ~ i y~~'~:~,~~~~i,~~, ~~~Yi~ ~e~:.r~~td ~Fr . ; ~ ' _ +AF y~ ~ {~t M I ' }~tl~}~ ' ' ~ ' ; 'iw . y~F'1~ ~ 7 ~ • ~ ' Y P. R So~ ~URVEY 1 ° it Vle-9 ;wvoel3ancl gyroup t; not in a, rlnge siee. Spa- terraces iiacl glacial flaacl plauns iiear Colberz and Ghat- K,Lne loarri-capability uniL $Ve- 4: «'oadIancl grpup G. 11ot ta,ro izi tlie eetitr:~1 p1rt of Spvl~ana Ce~uiitF. lI¢st slopes r in :L r;~nge szte} s~, 1 ~p~k4wap e- e ~t~seen ? ~~id 14 percent; fenT a~•e sreepea•. I~epre- 5pokane comgles, 30 to 70 percent sldpes ISsE}.~-~~ sentatire pi•ofilc, to iO perceait flf tUis camplex is innderate]y =lia11vw 0 t4 2 fn`hes, rery aark orayisn-brown, s err fr,abie graveity uol~aiie lo im ; froin 17 ko 25 percent is Spol~ane ioarrs that roarse s:~ndr 10 nm ; g~'aTlniar 5trusttirE ; nesI : uudisti$rbed s slope z•~,11~e of 30 to 55 pei-ceiit; t~~e rest corsis~ of areas kaare au or;a~afe uxat 1 encli Chicl: on ~e surf;~ce. ssCoW, soils aald otliet• Spnkane roils. T11e mcdzratelv to 1' iuches, aark-urawn, eriabte barelly roa~-_e sandy loava ; sli~btlr aeid, medium ac2d below a tleptb of 3 :nehes. LIIOtP Spakarie loaa11 IiaS a 5urfaCe 1a~~er 3 ar ~ 11Ycl~es 12 tv 24 anches, dar£; rellrrwisb=bron-n grarell, loams eoarse I.i131111QI' th731 thRt 0f e.~ ]Ok111Q IOaIII, D to 30 percem, Kope;. s1nd ; slFglit1y aeie. and is 24 to 30 inclies e~ to he~lrock. Surface ~~noi~ is `~4 inches grarelly cv4rse sansl. ~sztl at very rtipicl, 1n tlse hazartl of erosion ;i trery Tiie Ca1or of the surfflce 1,%ver is ti-erv daz•k ~~-1st~ k~rown FerP. ta ~Ters dark bro►rn. The sul~soi1 xanges from dark- brown -rlais complex xs used :ts irootllanc3 aiici for luaired grnz- to dark rell4wich UxQwii in calor antl #roin gr:ivelly sandy zn g. (As i coiiipZex: capabzlity uadt VIIe-J.. B;cona- loam ta tra•;tvellv 1oanap oaarse saiiel in texttire. Gra~-elly txer~ts :S~~ol~ai~e loan~, mo4lei~%te1y sI~a11a~--Zralaility caaree sasncl iS :~ia[~eptIa oE 26 to $G incl~es. I:~ sai~ae ~.i-eas it ~~[~e-X ;~roacllaii~l ~group r_ not in a mrne site. cobblestanes occizr tliroughaut the prafile. A; mucFa as 10 apflkane, 1oam--capnlaility lllY1ti VIe-2:woodlnl,,Z ~r~aup perceiat af so3ue are:~s consists af other Spri~ciala sails; 5 - fi- aioG in range site} l5 ~tic~ percez~t of I3oainer ~avelly silt loana; Ri~d 3 peresnt of aPa~:ane ❑ery rocky cot~p ex, 0 ta 30 percent st4p~s (;lnrton ssinde 1oam. `"1.-Frai~ 60 to 80 perceiit of fhfs naappii.nz ,.anzt is 'f]lis soil i-s sDmewI;at excesiirelv dra~~ed and htzs Mqcterately s1ia11Qer Slaakane 1oain; thB rest canwists of mQder~telr rapiclperiueabilit~*. It I~oI~1s leG= rh:~n 5 uaches ~r`1ll1t8 TQCIi 411tC10p9 t111C~ pf 1~~45GOS9 sails car oc^er Spo- of ~-;~ter tl~it Z~l:~nts cai~ use. Xt ia low, in lartiiits*. Xn ne soils. These soila malm up 15 percent of saraz tireas. ~eizer:~l, it is e~~sr to irork. Raots af most pl~cs penetrafe .s a conlples : ca~~<i1~ilit~+ unit VIZs-`, ~3~- compo" oa,,r ~ few iiiclies iiifa tlie gravellv caarse sancl. Surface nents: Spokaaae 1aam. znoderately shallow---~a :)abilztp Liuioff is slgw. ancl the laaxird of erosion zs =azht. -it VIe--?; wofldlnnd ~-rou~ i; not ii~ a rar~ge sir.e. Tfocix ~foct af xhe acrel~°e is uss~l as zroas'aar~ anzl for tcr4~~s--_%pak~ilitv u~YZt ~~s-1; not in ~rnocll~.ncl arazititr. ~:iedr,~,; of forn~'e €~ae la~-. Less il:an 1(1 percent ou~a ar range site}~ v.a~CC.7~~* fa,~.a~ xs cu1~i~-atec~, ai~d r~sl1y fe~r sanall ~.reas are iri•az~,ted. SPakane very rocky comples, ~ 30 to 74 percent sibpes 'Z`he Giaps grnwn are aifnlf tti and grlss for hav or pnsture. 11,E1.-Fronnn 50 to SU percent af this mnppiag unit is Wheat oz i-c-e is -o-row1i cIuring reestablisiasnent af alfalfa )(leaately shallow Spoli-131e l€]7E111. ThB tB.St C6uz1stS (1f and grass. 'Leo-itines zespoiad_~to sulfiir and izarnetimes tn anzte rock vizterops. boran. (CapAility unit ~~e-2; -woocllanrl go«p 17; not ~ Tlie acreacze fs used for timber antl for orazintr. T.3e 1II a r2alae silce) r,cze Of trlctarrr for la~;izi,~§~ is liinitecl. (~.s ceEU~~lex: SPringdale -raveIly Paamy sand, 30 t❑ 74 pereent ps~l~ilit~ lYlll~ ~~5-ry. 1~y coiiipaiients : Spo'sana sail siopes iSzE1= TH1i.s GOll 15 IT10ClEP;~{P' y PxteY1s3v9 DI1 teL'T:1 CE~ cap~.bilit;~ unit 1~Xe-1: ~-~dlaaael ~ an~,~ s:nOi i~i ' a breiks antl rolluratll sfiopes a1a1ig ini,or dr:tinageways in rai1ge site. Rock oitfcrops~apabi3ity Yii~~t TIIIz--X : no~ th8 CE11LT3T 1)7i'C pf tZle CoLZlltti. Representat_re f)rofile : Ll, 7yopCll:13ld -I'CILlp t11' T:Lll6'0 S1te) Spakane ex tbetnely tocicy cam~p7~~e, 2~ t~0 pe~~ent~~ to xi'ncbes. aark-afo~s ~relis tou~9 snna :ne~trat; gran- ular structure and siiahtlr darl:er coior in upper 3=nch25. aFes (SuE).-Fzazn 20 tca 50 pereent af tliis mRpping unit 11 tv 14 inches. brown grarell,7 loamy sazd; _'aw darlt•bracvn is ti maderatelr shaIlow Spokane loam tlzat h,is a slope ana seddi=b-brown matcles > ueurral. ^^nge Qf 30 to rO perceiat. The rest caiisists ❑f rocl- out- 1T to 60 inche; Urowa vgry „ra=eily Cvarse 3and; neut:al. :)ps. Tlie acre:sga is ~rse~l for timher anr~ for ~raaing. Ths testure of the su~°face 1a~-er ranges fram ge~avelly ~,s a calli~]les : capnbility- u~nit VII~~. Br eampa- loamy snaad to grarellv or cobbly snncl. TLe g-raR-eP con- ~ielats : Spoliane soil-capabilitr iuiit VIIe-1;;raodlnnd teait at the Subtgil ran~es fi om 40 tao 90 perceZ. A.s mueh --vup T. iiot in a ranze srte. Rock outezops-ca~al~ility as 1~1 pei-cent of soine :~ieas co3isists ~af ~I:~rble iaainsT canrse it VIIIs-X; nat in z ti~oot~an~l ~ot~p rar r:~i~ge sirz} sazid, 0 to 'OG percei7t siopes, and of other Nps~o'dale soils. ~ Z'his sozl i= svtnezrliat exeesstvelv drzi.necl and has 3nod- Sp11Tig"dale S@k ieS eiatelz• r-Lpicl pernaeakaility. It laalds less than a incligs of 1" fer that plarais c,un iise. The featzlity is Iow. Raot pene- Tlie 5priiiydala series consists af somezrhai esce=sivelg tiatiaiz is (leep. The Use af 3nachtnei-v 1s clif,ficult. Sttrflce ained, coarse testure€l nncl tnocler-itel)r canrse testured, z•w7aff is L-lvw to meclituu, and tlre ~1iizarrl flf erasiaxi is grave1ly a~~d cobbly sails. These soils fozme~T i.n ~l~,cial sliglit to mo~~{erlte. t~vash n1i:;ec~. ~citln sanie rolcnruc asli, Eintler panclerasa This soil i-z uWecd as rL source of r_,rn, reI for coaerete. Tliere :ie and o-rass. The3 are nearly 1ece1 ta very wcc~zp soils is same ~ aziug on t~~e less slaping areas. b~~t yie£r~s of out«asi tez•race~ ;~z~cl floo~l 131ains. Tl~e aurau:~1 pi•e- forage aze 1o~r. (~apability uiiit VIIs-1; troodland cipitatian is 35 t0 18 inches, and the frost-frec season is 'OToup 19 ;nOL lIl -l, PS4I1gQ SLtQ) out I40 days. Spring€lale gravelTy sandy Ioazn, deep, 0 to 20 percent tSoils vf the ipririgdale series are used for alfalfa, grLus, slopes 4SxB1: This soil has a surface layer 1or 2 inches d crrmiir. They ara also used for ~i xzin~; intl a.s thicl~er than Ek~at of Sp~•ing~l~.Ie ~relly sanc~y 1onm, 0 to ~vr~radland. 20 peicent wloges; ~nc1 t~ie deptli tQ ~vel and eob'~lestanes _ Spria~gdale gravelly sandy lrsaz~, 0 ta 20 percent is more than 36 inclies. '~lais soil liolcls 5 t0 7 inclies af ~ ❑ges IS,NB].-This is the dorninaiit soil on thLe autwash water t}int plants cniY use. -1s muGli as 10 percent Qf same °t ~ COUN3'Y, WASMI:+GTOZ 37 •eas consist.s of otlier Springc£ale =oils, and is tt:uch :tis S xekaa „z-avelly Silt Inam: ?fl to 36 percent siupes percent coiislsts of 13oiutei• and Clay[an soils. f TeCl.-This gxavelIy sflil h2s niedium t❑ :-apic1 surface `.Chis soil is ttsecl fot tl►e same crops as Spr:.~gd21e rtuioff an(l a rsioderate to see-ere liaxzrcl af ernsian: About •avell~x s.7ii~ly PoaPn, 0 to 20 ~aercene slapes, l~~~r nroiuces 3~~erceiat Qf so~e axeas caxisists ❑f I3ernl~:i1 aaicl Scl~u- "ixer yielc~.s. (C.~ja.~i~ilitr uiiit I~4~a; ~rvr~il2:~r,:i ~rvup annclter soiIs. 15 : liot. I n a. raizcre Eiite) Tliis sail is used primarzl}■ far taitYber psoztuction. Szrsall Springdale cabbly sand} loam, Q to 20 percent slopes are.is are seeeied ro sinall graiia or to grzws ar-;i legu.mes fflr ~6).-This soil conrains graoel and cobblestores at a liar or pisture. (Cnpabzit,y uizit %rc-A2anc1 group ;Ptli af 20 fo 36 inclies. .:Ls mucli ai 10 percenz ot sonie i; aivt in a, rnnge site) Fc<~ o~c' cL-Df c° areas cotisists of atlier Sprinaclale soilr. Tek❑a veAr rocky cpmplex, ?a to oa percent ia~es Tliis soil zs iFSed as woosilancl anrl far (yrazin~-. i;CaZ3a- (?ka).TFroiti ?Q to 60 pezcent of tlzis m~pp:ng unit con- Izty ruiit VTTrs-1; Ys-aaclland graup 17; not in a a ng e s3sts of sTncl=zone outcrops; the i est is a Ts'saa, ;ravelTy e) silt iaain thaz lias a slope range of 30 t❑ 55 percent. Tlie acreaae is ii-ced for gratiinz. (As a complei : mpability koa Seiie5 unit ~`IZs-?. £iv coinpanexits: Telsoa soil--._npauilit unit 'LIe-?: wavdl.ind group 7: not iaa a i•aaa~e ri:e. Roc- out- ~'lxe Te1~4~, sez•ies coPiststs of ~re13-r~raine~~. ~,z-elly, crolag--c:~pftk~il'at~- tiazit ~`IIIs-1; iia't ill~. dre~Dc3laai~l ~ oiip it°►e~lii~ii~-textiired soalr 71ieae sails fornietl uziclei• caaaifers or raizcre szte) -„d gracses izi weathersd snndstone, quarfzite, sc_-~st, aiid ile. They occupy gQY3C1y sl11p111z to rei-r steel) :::dlr aild Ubjxg Sex ieS Du11t;11110tiS 1Z`LTs. T11~ :1Y111i1;1l '~?IECI~]it~itlOil 13 ~~DflYl~. 77 iiiclies, alicl t1Le fzosr-free sze.i=on is aboue 120 days. The soiis of tlie U`11ho- series are c1ark- L_olni•ed, -ws1I Telcoa soils are u:ecl toi• ~a•aaiT7~, a5 rcao~lla~.~i. ai~ed as c~rall~ed. anct ;iietliu~a~ textizrecl. '~`her zre erzx t~eep for tclllfe lial~itars. _L fe►~- ~~lla11 aresi~ are ~i=ee~ £or ~ain, t138 31]i~?C ~3Ri~c, l~ui l~eela;oc~; is at a cle~~cli af ~i~ ta 40 inches Lls-, liilcl le~u~~es. 1~1 s~nie ~~laces. `~liese sai15 fOYTalEtL 1113C~eT ~-ass in g1ac1al ~`ekoa. az•avelly silt Ioam, 30 ta 55 percent slopes till nii3ed in the upper part zritli loe~~ anu ralcqnia asli. 'TiD1. Tllis svil occtirs on Tekoa ltouuitnin and _imilar Tlxei• ❑eciap.- ~entlv s1o~~ing tn ino~lex•:~telG s:ae~a uplant~.s. - ❑izioi~eorie9 r~~ t~ie cou~~.tz-. ~~ost ~l~.~pe; are be: eea~ 30 Tlle ~.zuiu~Il l~recipitataaii zs la to ?Y anclies. The frost-free d -15 percent. RepresentatiFe profile: season is about 140 days. , Q t6 14 illChes, ~1arh-brcrirn. Prlal~la ~ave~p stte ivam. ~nnulaF 1-~1liz voila ire ~isec! tor ~i•ain; gezs; lezztil:. ~ra~W, ~.lfal~~., iu the ugper 5 inches ; neutral, ;radin, ta s3fghtlF ac°d belQCV VeZ~~ -lbleS. and 4rCtzard f3'Yt1ts. • - a aepth af 5 inclies; uutli.turberl areas hare an vr_anic mat tFtlig silt ioazn, 5 t0 20 percent slopes is i tiich tutck vu the surraee. tlle cloininant ---nil on Peaiie, t]rcliarc:. nvd P:easant Prai- 14 to ?Q iucues, durk•browa, frirtble firareTly ]iears ~-ac Paam Fhft[ breaks into prisms I tv ? inehe= wSs3e agd z-lien inta riea ua tlie cenri•al nrt vf tixe cotiFatv,trliacli raceires l.S to angular vlocks ?•`s to',~ ~ne~ ~d~; ~~~u~n ~cia. ?1 izie3iesaf r;~infR 1 nni7uz11y. It alsu occiir= anthe ~1aci:~I 20 t4 85 iuches, yplloccfsh-4ratvn verr grarelis 1oarn :massire outsrash plain in Ciie sreseern aizd sou~~IWe.Ern pnrt.s of at fineir lamfai:ltetl; meaiua, ncsa. tiie coiinti- wlizel~ ~.'eCe1i"B 1.J to 18 lI1Cllei Df T:~fal. ~iost 38 rvcues Practuresl s:ene➢szone slo~~e, ~rre =l~et~reen 6 ftlIL1 10 Zaea•eeiat; a, few are steeper. Tlae color of tlie surface laeer is brusii or dark aa•on'n_ Reprewentztive profile: ►E teNture ol tlie subsOil iS grarellr }.aat11 oa ??'aI•elly p to 4 inches, biacL°, Fery friabYe silt laam; gr=:.F3r structure ; t loam. Fracture{l pnreiir rack occuia at adePth of 24 meaium aeacl, to 10 iiiches. As much as Spercent of -zanie areas eaaisists fta 13 iacues, rerg dark gras, rerr Eriable sl-_ loam abore a Bel•iiliill and SChtinznClier svi1s. ciepch oi 10 inches ; lireahs anto plazes Ylo ro vs Inc$ tuic3; ; ~'liis ~oil is rce1Z d~~~n~~3 anc~ madersr~ll- ~e~•~i~e:iole. It '1'gt~tly ac'~a; rerr ~t~.rk browu, res•c f~able s.it Fo:~ui beta~.• lc~s ~ to r ir~c~xes af r~ater t~aat lan~~ caix~ n~e. ~'i~c ~er- ~ de~'th ot 10 tucbes; neutr:,a. ' p1s' [o -k-' incbe;i, tlarY.-Farpwn. Sr:u lOnsii frizble L~-1on• n cleptFx af tiTity aa low. Raots penetrnte to the sanzlvtone. Siarfzce 32 Fnclae~: i,reaks tnto subangul:er btaclrs 1_ :o i zucli wide; -..noff is ra ~it~, :~a~~~. tlle Ii:7Z7TCJ 0l ~'2`o?PQIl I3 Wf.'L"EI'@_ AeSlTYRI. 1rOI1e Of t~iis soil i= cuItiraeecl. It a- u=ecl for tisnber, for 42~euc~a 1nche" ulown rerr Pci:ilile verti- rne :.a,Fav ioauz : ❑zill an~l "~y ~-sldlI fe. (Cnpabilitr ~init Ti~ Ie-? : rraoc~- laiid ~raup~ a; zioc ux a r:~~l~e =it~] tae cvior of clie s~irface 17;~er rar~zes frotn ~Slacla ta veiy x`ekoa g~.~avelly siit lcram, 5 to 20 percent slvpes eln.rk broerii. Tlae felture ❑l tiie su~i~oil ranzes from silt :B1.-Tha suiface Iarer of this sail is a littie tli'scker than lolnx ta rerr fine sznd}r loam. Litne nccizrs in nlaces belaw zt of Tekoti lrravelly : ilt 1oam, 347 Fa 35 pereenz slopes. adepili of : uzclies. Tn same areas ns inucl~ Bs 15 pezcent S11rf2ce rianoff as inedium; and the erosiQn hazard niod- ol the subYoil consists af coarse gP7111Le. Rrid b~salt SAl7C1y zte. Surface grave1 hizxclers culta;-nrivn iaa soine placm grarel; aaid a fecr cabblestozies. In places a graFellp and i ll]L2ch 1S 3 percent of -zome azeas vaixsist; of Bernliil.l stincly layei is present ae a. cleptix o# 36 to Ifznclies. As d Sc1iimifteher soxIs. much as 10 percent of same argns consists af Bernlaill, - `I'liis sail is u:.ed mainl3• for timber anc3 graainty. A few C1iener, Snflsr, :snd Hesseltine sails. tnLl areas sre used fvr small graui said zlfalfl. or are Tliis 5aii is ~rell dt.~ine~l anrl rnoderntel9 }~erzileable. Xt ~ed ts~ ~r~.ss and Iegumes fvr pa.s'raire rar hay. ~~`ield.s ]3olr~ 7 ta lI inclies ❑f Ara~ter tliat p1~izts can usB. ~`]xe --3 fa,ir. Grain anr1 grass craps z•espuzid to xiit-ragea, fertiliGv is liiah. Raot penetratiQn i; rez•$ deep. There is de-gurne, resp€and fo Slilflix aZld 13l105pI1Q3'l15. (G'R.pRb111ty ncr d.ifficultv in ehe use at farrn machinery. 42-urface ruazoff r~ IVe-k; woacllancl -rpitp 7; ilot in a raazge site) ia mecliuttl, ancl elte hnzarcl of erosion is moderite. ~ 102 sou. s'UxvEy Tanr.E i. Interpr?tdtion o j enqineerinu ,Quitabilitc;s;ourceof- Soil [eatiires affer_:ng- Soil series or trpe, I ; F:u•iu poncL• and map s}mbols ~ . • Topsoil Sand ' Gra~•el ~ Itoad Hll Highn-a~•locarion Dikes or le~•ees Reservoir arc:► Speigle (SoE)_____ Fs:r_____ \ot Z-uit- Not suit- Fair_Slight to high su:cep- \•Iocierntc s:soil- 'Modcrntr pcr- , ahle, nbie, tibilitp to frosc, ity; imper:-:ous meabitit}-. action; moderate x+-tien coui- . permeabitic}•; low paetecl; !er- shrink-swell t-lu•ink-sw;Ll, pocenual. potential. • 3pokane (SpC, Guud____ \oc suic- _,,~ot suit- Good____ Slieht suseegtibility to LoR• skabilic-: \Ioder:ice to SpO, SrC, SrE, able. sble. !'rost actiou; mod- semipcrviou; ro r:ipid pec- part of SsC, erate to rapid imper~•ious mc:~bility. SsE, StC. StE, Perme:ll)lL1LV; low n•hen com- a►id SuEj. I -4Iirink-sn-ell pacted; lon- potentiai. shrink-swe! potentisl. ~ $priusclale (Sw B, 1 Fs:: _ _ _ _ _ Fair------- C-ood_ _ _ _ Very good_ Slichc susceptiUIIitc to \Ioderace to :.igli ~ Rapid to vcry Sx6, SyB, SzE). frost acuon; rapid stabilitc; z-emi- rapul perme- to vem~ rapid perme- pervious to , abilin-. • abilitv; low shrink- pervious traen ; • sn•ell poteutinl. compacted: low . shrink-sn-r11 t i potcutial. . r i . Tekoa (TeB, TeC, F3L_____ - NOL3llli- t-NoTSiut- Fair_____ \Ioderntetohighsus- NWerntestaoilit}-:' \foderateto I TeD, part of nble. ablc. cepti bilix''to frost semiperviou to ; rapid pcrme- ~ TkD). ; Aecion; moderate to imperviow abilic}-. rapid permenbilitc; when eompact- 't lom shrink-swell ecl; low shriak- ~ ~ poteuEial. sn-ell potendal. j • , ~ . i i • f L'hlig (UhA, UhB, Good\ot suit- ~\ot snit- Fair_____ 'Moderate to veryhigh \Ioderate stnbil- ~'Moderatc per- ` I UmC, part of nble. able. suscepGibility to it} ; cemipe~r?ou- • menbilicx-. CnB und Co8). . frost action; mod- to impervions j erate permeabilitp; n hen com- f low to moderate pacted; lo%v to shrink-swell moclernte s6rink- ~ potentiul. sn-ell potenrial. ~ I ' Vassar silt lonm Poir to \ot suit- \oc suit- Fair_____ Modernte to very high \Ioderatc stabil- ~\Lodernte to i (VaC, VaD, part poor. able. able. susceptibility to icv: senugerviousmodersttelc of VsD). frost action; mod- to impen•ious ' rapi<l perme- erute to modcrutelv n•hen coin- i abilit}-. • rapid permeabilit}•; pncted; low to lo" to modemte moderute shrin.l-- shrink-swell swell potencial. potential. . ~ See footnote ut end ot tabie. 7 sPO-E cov--N.-aY, wj.~GTaN 103 ,7bpertaes of sails--Cantiszued ~ • aoil features affecting-CanCintded ~ Fsrm pvnds-- ' + Conrinued Agneul tural Terraces aad Sc"nge dispvsal E dr:tiiuige Irnnation di+.•ersions Watern ars heids TrafficabiliLy Emhsnl:ment I I,otir shear strengtla, l.[vdemte per- lToclerate ia_ _lIaderate re- _lfoder:Gte resistr .lfodernte per- ' Zow shesr ixnperi•ious when meahility. take rate: sistanca to anee to erosiQn, iaesbilitr; ? zerength, compacted, slight high waier- erflsicsn; higli wates- kugh n•ater- i ~aocierate aompresaik~slity, hoiding anodsrat~; holding capsc- k~aldirig , lcsad-sarrying I nnoderate cigaeity. permeabiiit3•. it%•, regetiaLion caparaty. capneity; stlbilit~_. diftatilt to ~noderate es[ablish. perxne:tbiliEy Losr =_hezr strengtls, _lloderate to _lfosPerate to .lioderate re- Mvder.ate restst- .lladerats to T.ow shear IE Sei115~7.72Ti'1OL15 to TApid peF- TAI]IC~ 8I1F1i? 3F5[7.17C@ to aItCe Cfl 250.194; S'A~]SCl p@S- ' aLF~2IIgCt1~ t1Yg}l I llY1~]s'Pv-lQL1S [Cl1L'll ~ r~a~b~.ity. rate; ix~vd- erosio~a; nuod- maderats to la~v snent~ilitr; load-carr}=iilg cvmpacted. , erafe to 1aw era[e ra ragid wa#er-hoidiiig Inflderaie t❑ rapacity; wafier-ho1(Lg permenbility czpncrtF; segs- Iaa• nacer- modernte to ' capieii}-, ta.tiflsY difFiciilt hvtdiag rspid pes- I to esmblash cagscicy meabilitv. axeegt on are.es of Spakaue loaan, nhere it is faariz- e.1sr to I j £3L.1bllstl Aild n•here water- wavs are likeiv j to bc Fieeded.. ~ HigEi slsear streLiath, i Rnpid to very Papid iutnka lToc£ertite to lov ]Ioderate to lan Rapid fio very ;Hiaa shear ~ seuiipari•iaus to rapid perme- rate; mnder- resi:ranes to resista=ice to rapicl perjue- 5trength; high per.-iou= wheai ability. ate to lon- ero$iou; ragid erosiva; mader- abilitr• ancsder-, t❑ad-eurrying rosaip-icxed n•ater-holcii.g Eo rerv- ragid mte to Poer water- nte to Iow , capmmc'sty; rapfd sli~ht coul re5si- c:ipacity. peru~eabilit~-. holr9iug eapacitv; ~vAter=haldin~ ;cr rerc r~pacl ~•egetatxon fa'arlv capnci[~-. ?e~eAb~tY- ~ bihn': a :zn:t4~o erailitiyie i dif~cult to dif&- to Fiigh . ~ Cu1t ib e5tak]1i5b, I depencling an , eobble=toue ~ COIlYC11t. Lan• skte:zr stren;t~a; ''+Faderate Ea .lYoderaCe to l~oderare to 1o~s ~lladerate to 1Qn• IIoctera[e to Lon- slienr sesiai~:•s-iflus tiv ' rapid penne- slow isitaLe resiaxance to re5i5tsnce to rapscl perrsie- =crsugrh; i:npervsaus n-heLz ; ahility. rate, mQdQ: ero:ion; niod- eroePOn, moder- abilit}-• mod- moderate Ivad- N compacred; : :ete n`ater- erate to rnpid ate n•aeer- erate water- carr3:ng uiecEaiiui cvaupim5- ~ hvlttiiig ca- pei-naeabihty. holding capac- halding ca.- rapacitip; mod- ihslir}-• LiYOder- ; pacity. fty, ve$etation pac'sty. emte Co r3pid ire ;r5briitti. ~ f.tirkr easy to p2rmeability. est-iblrsta n•here tikaierwars are 1'skeir to 6e needed. L,ow ;lie.ir sfrcaig~tfx; ~ Mcsderste ][aclerate to 'Moderata to low tiPacler;ete to Tpn• 'NIoclerare lasv shear I seaiiipera-ioiis to ~ permeability. slow irscake resiscaace to resistaiiee to pCl'Crie:II]I1tY•p ziF£11gL71; iEieg~en-iakis 1~•liea ~ rafe; t~i5h .a ervaian, m4d- ero-iais, high t4 'high to ven• naaderate to i cauiFaarred, verr hiah er-ite perrnc- verv hi-h hizii n•atei- ?nn lvad- niedittEU caiiipres:- ` water-hakli-_g abiliUr. naCer-ieolding holding carryang ibilir■- low c:tpacity. cngacat~, ~•ege- eapacitr. capscitir; ~ stabilir~-. ICaiaan ea5u }v ~ aiaderate ~ estab3ish. ~ perineahality. lloderace stiear 1fvderate to lIoderate inta'se :lioderate .lfvderate resisft- 1Toderate to ! lIuderate shear s[reilgth; semi- moderately mte; mr~r3er- resi;tance to ance to erosion, ma~lerately f -srength; I per~•io+~ to irn- rapid perme- ate zs-ater- erosion; mod- mvciesate ~-ater- rupid ~rrae- ~ morierat~ lvad- ! peririoeis 3vfien ubility. halding esake ta holding eapxic- ubilitr; mad- ~ rarrvig c~r~np~cLed, eapncity, maderately ity; regetation eraie ~rater- capncirzty: medxum conapress- rmpid perme- easv to esta,b- holding -moder:at,c to ibilitr: lon • abilitr. lish Eshere capucitr. Fnoder.stely ` staUility, n atem-nys are rapid i llkel6' CO be pi'CIdie.9.t)1l3ty. E AeCLI.ed. ~ HYDROLOGY q UFF-SI'I'E FLDWS 4ff=site tapography and existing development in the surraunding area mitigates the impact af off-site flovvs ta this subdiGision. After an extensive fteld Visit, off-site effects to this subdiwision are as follows: 1} Panes Cemetery is lvcated to the sQuth and adjacent to the plat baundary. Grades in the cernetery prevent flow on to the site. 2} Existing grades along the east plat bou.nda.ry flow ta fihe Northeast arad away from this site. 3} Uevelopment to the nvrth flows tv the east. improvements to 12th AVenue w$Il prevent off-site flow from coming onto our property. 4} Flvvvs along fihe wes¢ plat baundary frvm back yards on this site and the adjacent . development will flow n4rth to 12th Avenue and then flow west to a 1Qw paint. pines.doe . z L +~~'~r ~~T oO-1 X?4t~ 707~9 L A rc.e-A ; ~~P 9~ E~9 §9 16)613 3S J4= ~ Z, - A~ ' ram~w 3;.-,' t) v,'NL ~•~'7'1; IeTvw'~ioa '1Ie,,e ~~~v~ ~ ~ - • I~ ~ If 5'r~'~ ~ ~ ~ e- f CA~ 0, 40 L x 3.5 v ca/A c ~A ly'rvIt L v s~ 113d ~N A c ~~~z.~~r►~~ = ~~'j ~P ~s~~~ ~t~ l G L0T ^CeP\ `rOT-krL- kq-f2el*q Z, 33. A --5- f`7 5~~ 45. - - 3.i?~ • 3.6 D V/~ G. z;?(7A.rvA L ` V,5,0- ,~-,C? C-14 r ~ = / 7~' ¢ ro~ Z- e92 ~4? 7- ~ . r~ ~ F • C= 4 r~~►~.~~~. Y1:1WL1U ~ r AnIf~S¢C 71 52~2'i 74 4 ° ~ ~ . . -5 r -0 1 ~ ►~9 ' ~ ~ ~~e~r~ 77,r ~ 45 ~.4~• WAC~~~~ , z° J~"►~~ ~ ~ ~ ~ i r ~ t Ll . 3.,5'ovI'Ac :-46;z,> 4.5 V's e L ToTAqL lllr 1 ?-(D 7" ' G nd~~ a~~ ~ J ~g3~3 • ' .~9~~ ~~v w G .5~ • 3.S o~~R~. ~ ~9>/.~.~T~ NNN~ ° rA~~~ ~ol~l D ~G s ✓se . 3v c.~v -rg~~~~ ~ - " ' G ~ ~~~r- &000111- S l/V f-f . 7r • 4Z ,4V~ ~~~9 1 ~ ~ G r~ge , 30 ~~v , sr~ ~4r3ov~ . ~Oo9 o tG % . L=/~d' S= 3, 3S/ ~q = z 960 , OT /9v i' H f2eG~ ~ -4 c'3q9'O G4R-,tti Z I • 3. S D ✓~~G > L ~ / ~Cf~M~ ust L= 3 30 r S' ~ a f~= ,~!'g = I 6~7 Bf7WSTRING NETHOD (TEN YEAR STC]RM I7E5IGN) PRQJECT: V. PAVES DETENTION SASIN l3ESIGN BASN: BA5IlV-A REVIEWER: GSM NCJM6,ER ()F DRYWELLS PROPC35ED DATE: 10-Oct-97 4 Single (type ,P I Dvuble (type B) `d'otah Area (eaPc.) (see H 1) 2.19 Ti,me of Conc. (calc. ) (see H1) 6.90 C4mpasite"C" {Gale.} (see H1) 0.40 Time of Gonc. (rnin) 6.90 Area (Acres) 2.19 C' Factor , 0.40 AsphalC Area (sq. ft. ) 16613 Valume Prvvided 1021.5 Outflow (cfs) 1 Area * C" Factcrr 0.$9 , #1 #2 #3 #4 #5 #6 #7 Time Time Lntensity Q dev. V in V out Starage Inc. Tne. (min. ) (sec.) (in.lhr. ) (cfs) {cu. ft. ) (cu. ft. ) (cu. ft.) 1 *60} (A*C*#3) (ourf.*#2) (#5-#6) 6.90 413.84 2.82 2.50 1386 413.84 972 5 304 3.15 2.81 1131 300 831 14 600 2.24 1.98 1468 600 868 15 900 1.77 1.57 1630 900 730 20 1200 1.45 1.28 1720 1200 520 25 1500 1.21 1.07 1757 1500 257 30 1800 1.04 0.92 1786 1800 -14 35 2140 0.91 0.81 1805 210[1 -295 40 2400 0.82 0.73 1844 2400 -556 45 2700 0.74 0.65 1860 2700 -844 5+6 3000 0.68 0.60 1890 3000 -1114 55 3300 0,64 0.57 1949 3300 -1351 60 3600 0.61 0.54 2019 3600 -1581 65 3900 0.60 0.53 2146 3900 -1754 70 4200 0.58 0.51 2228 4200 -1972 75 4500 0.56 0.50 2304 4540 -2200 80 4800 0.53 0.47 2317 4800 -2483 85 5100 0.52 0.46 2412 5100 -2688 90 5400 0.50 0.44 2452 5400 -2948 95 5700 0.49 0.43 2533 5704 -3167 100 6000 0.48 0.42 2649 6000 -3391 DRATNAGE F(7ND CALCCTLATI(7NS Required grassy svvale pcrnd stoarage volume = Lnpesvious Area x.5 iml 12 in.1~'t. = 692 cu. ft. Crrassy swate pond volume pravided = 245 DRYWELL REQUIREMENTS - 10 YEAR dESIGN STORM Ulaacimum starage requirA by Bowstring = 972 cu. ft. Number and type af Drywe1L5 Requared _ 0 5 in,gle 1 T3ouble TIlViE OF CC)NGENTRATICJN (minutes) Tc (Qverland) Tc (g,utter) Ct = 0.15 L2= 557 ZY= 0.16 LI(A) - 64 Z2 = 54 N(A) _ 0.4 $ = L? S(A) = 0.02 n= 4.416 s = 0.4I'7 Tc (A) = 3.27 ci = 0.20 L1(B) _ 0 Tc (gu) = 3.63 N(S) = 0 Tc(,A+B) = 3.27 S(B) = 4 Tc(tat.) = 6.90 Tc (B) = 0.0 Entensity = 2.82 Areas "C" AT A = 0.97827675 W v 10.4770 0.38 0.90 0.342 R= 4.0971 1.81 0.30 0.543 V= . 2_56 0.00 0.00 U Tc(gu) = 3.63 0.00 0.00 0 Q(est) = 2.50 0.00 O.Uf3 0 0.00 0.00 0 HoTding = 19.85 0.0(] , 0.00 0 Total A Cnmp „CII . 2.19 0.40 Q=c*~*A= 2.50 Q(est.) = 2.50 Tc (tatal) _ Tc {4verFand} + Te (gutter) Tc (csverland) = Gt*(L 1 *NIS"f1.5 )"0.d} Ct= 0.15 L 1= Len$th of Llveetand Flow N ~ frictian faetflr of ouerTand flaw (.4 fvr average grass ccrwer) 5= average slope of averland flaw Tc (gutter) _ Length {ft. }IVelsxity (ft.lsec.)f 60 S= Bottvm width of gutter [n' ditch APea = d*B+dn2I2*(21+22) ZI = inverse of cross slope one of ditch Z2 _]I1VeCSe (]f CIO55 SiLpe twQ {yf dICCh d = dej3Lt1 Qf floW 1A giltte! (estiTils'iie, ChecIC estimate Wlth FlOVy) vvettea perimeter = B*d+{ Iesin(am(i /z 1))+l/sin(atn(i 1z2))) Hydraulic Radius = R = Area/Wetted Ferimeter Velocity T 1.4861n*R^.667*s^.5 Flow = Veloeity*Area n= 0. 0 16 for asphalt s = longitudinal slope vf gutter BOWSTRING MOETHO1] {TEN YEAR STL7RM DESZGiV} PRC37ECT: V. PTNES DE'Y'ENTIfJN BASIN DESIGN BASTN: BA5IlV-B REVIEWER: ~SM NUM13ER C}F DRYWELLS PROPC}SED DA'TE: 10-Oct=97 I'Single {type P 4 DQUbte (type B) "Totaf Area (calc.) {see H1} {].62 Trme of Conc. {caIc.} (see H1) 5.10 Cvmgosite "C" (calc.) (see H1) 0.43 Tisne of Conc. (min) 5.10 Area {Acres} 0.62 C' Factor 0.43 Aspbalt Area (sq. ft,) 5800 Volume Provided 440 C)utflow (efs) 0.3 Area * C" Factor 0.26 #1 #2 #3 #4 95 #6 #7 Time TiFne Tntensity Q dev. V in V aut 5torage Tnc. Inc. - (TnlTl.) (SeG.) (IIl.lh.T.) (Gfi) (Cil. ft.) (Cil. ft.) (CLI. ft.) (#1*60) (A'~~~~~) (Outf. *#2) (#5°#6) 5.10 305.93 3.16 0.83 342 91.78 250 5 300 3.18 0.84 337 90 247 10 600 2,24 0.59 416 180 236 15 900 1.77 0.47 469 270 199 20 1200 1.45 0.38 499 360 139 25 1500 1.21 4.32 512 450 GZ 30 1800 1.44 0.27 523 540 -17 35 2100 0.91 0.24 529 630 -101 40 2400 O.82 0.22 542 720 -178 45 2704 0.74 0.20 548 810 -262 50 3000 0.68 0.18 557 900 -343 55 3300 0.64 0.17 575 990 -415 60 3640 0.61 0.16 596 1080 -484 65 3300 0.60 0.16 634 1170 -536 70 4200 0.58 {}.15 659 1264 -601 75 4500 0.56 0.15 681 1350 -669 80 4800 0.53 0.14 686 1444 -754 85 5100 0.52 (}.14 714 1530 -816 90 5404 0.50 0.13 727 1620 -893 95 5700 0.49 0.13 751 1710 -959 100 6404 4.48 0.13 774 1900 a1026 DRAINACE PC7ND +CALCULATIONS Reguired grassy svydle pond storage valume = Tmpervzous Area x.5 in.l 12 in.lft. = 242 cu. ft. Grassy swale pond vviume provided = 245 DRYW'ELL REQT.]IREMENTS - 10 YEAR I3E5IC'rN S`F'ORM Maximum storage requirW by $owstx-ing = 250 cu. ft. Numler and type af DryweEs Required = 1 Single 0 Dvubte TD,1E OF CONCENTRATTC]N {minutes} Tc (averkkand) Tc (gutter} Ct = 0.15 G2= 215 Z1- 0.16 L1(A) = 50 22 = 50 N(A) = 0.4 B = S(A) _ 0.02 n = 0.016 5 = 0.011 Tc (A) = 2.93 d = 0,142 L 1{B} = 0 Tc (gu) = 2.17 N(B) = 0 Tc(A+B) Y 2.93 5{B} _ 0 Te(tat. ) 5.14 Tc (B) = 0.0 Intensity = 3.16 Areas ='C„ A*C A = 0.50571312 • WP = 7.2452 0.13 4.40 0.117 R = 0.4698 0.49 0.30 0,147 `J = 1.65 0.00 0.00 0 Tc(gu)_ 2,17 0.00 0.00 Q(est) _ 0.83 {1.00 4.00 0 0.00 0.00 0 Hvlding= 7.66 0.00 0.00 . 0 .4 oL[i y~yl !'S y4 ~~(~omp flCSl 0.62 0.43 Q=C*I*A= 0.83 Q{est.} = 0.83 Tc (total) _ Tc (overland) + Tc (gutter) -r~ (overiana) = cc*(L i *NeSno. s)A0. Ct = 0.15 L 1 = Length of Overiand FPnw N ~ frictian factor af overland frlow (.4 for average grass caver) S = aVerage sloge a£vverland flow . Tc (gutter) = Length (ft.}IVelocity {fLlsec,}l64 S= Battom width of gutter ar ditch Area = d*B+d^2/2*(21+Z2) Z1= inverse of cross slope ane of ditch Z2 = inverse of crross slope tsvo of ditcb d= depth of flow in geatter (estirnate, chack estimate with Fiovv) wetted perimerrer =B*a+(llsin(am( I IZ l)1+I1 sin(atn( I122)}} HydrauPic Radius = R = Areal'Wetbed Perimeter Velocity = 1.4861ra*R^.667*s^.5 F1ow = Vel'vciry*Area n=0.a 16 for asphalt s=1sangitttdinai sPape of gutter BOWSTRING METHOD {TEN YEAR STORM DESZGN} PROJECT: V. PEIIF-5 DETENTTdN BASIN DESIGN BASIN: HASIN-C REVIEWER: GSM NLTMBER OF L)RY4VELLS PRdP[]SED L}AZ'E: 10-£3ct-97 0 Sing]e (rype .4 1 17oubIe (type B) T'otal Acea (ca3c.) (see Hl) 2.33 Time of Canc. (calc.) (see H1) 6.37 Compasite "C„ (ca1c.) (see xl) 0.42 T'ime crf Ccmc. {mi.n} 6.37 Area (Acres) 233 C" Factar 0.42 Asphalt Area (sq. fl.) 19554 Volutne Provided 1251.5 Outtlora (cfs) 1 Area * C" Factor 0.97 #1 92 #3 #4 #5 #G #7 Time "I'ime Intensity Q dev. V in V out 5torage Tnc. Irsc. (min.) (sec.) {iE►.1hr-} (efs) (cu. ft.) (cu. ft.) {cu. ft.} 1 *60) (A*C*#3) (Outf.42) (#5-#6) 6.37 382.17 2.92 2.83 1450 382.17 1068 5 340 3.18 3.08 1239 300 939 10 600 2.24 2.17 1584 600 984 15 900 1.77 1.72 1766 904 $66 20 1200 1.45 1.41 1869 1200 669 25 1504 1.21 1.17 1911 1500 411 30 1804 1.04 1A1 1945 1800 145 35 2100 4.91 0.88 1966 21e0 -04 - 40 2400 0.82 0.79 2010 2400 -390 45 2744 0.74 0.72 2029 2700 -671 50 3000 4.68 0.65 2062 3000 -9.38 55 3300 0.64 {].52 2127 3300 -1173 60 3600 4.61 0.59 2205 3600 -1335 55 3900 0.60 0.58 2343 3900 -1557 70 4200 0.58 0.56 2434 4200 -1766 75 4500 0.56 0.54 2512 4500 -1988 Sd 4800 0.53 0.51 2532 4800 -2268 85 5100 0.52 0.50 2635 5100 -2465 44 5440 0.54 0.48 2679 5400 -2721 95 5700 4.49 0.47 2768 5700 -2932 100 6000 0.48 4.47 2851 6040 -3149 DRATNAGE PQND CA.LCTILLATIONS Required grass}+ 5wale pand stvFa,ge volume = Impervious Area x.5 in.l 12 in.lft. = 815 cu, ft. Grassy swale pon.d vnlume provxded = 830 D1tYWELL REQUIREMEAITS - iQ YEAR T)ESIGN ST'ORM Maxi.mum st+mrage required by^ aowstring Y 1068 cu. ft. iVumher a.nd t}rpe of Drywe11Ls Required _ Siaagle 1 Uauble TINE OF CONCENTRATION (minutes) Te {oaerland} Tc (gutter) Ct = 0.15 LZ= 492.02 Z1= 0.16 L1(A) = 64 Z2 = SO N(A) = 0.4 B = Q S(A) = 0.02 _ n = 0.016 s = 0.0171 Tc (A) = 3.27 d = 0.21 L 1(B) = Q Tc (ga) = 3.10 N(B) = D Tc(A+B) = 3.27 S(B) = a Tc(tat.) = 6.37 Tc (6) = 0.(} Tntensity = 2.92 Area,s „C„ A*C A = 1.07050368 W = 10.5413 0.45 0.94 0.405 R = 0.1016 1.88 0.30 0.564 V = 2.64 0.00 4.00 0 Tc(gu) = 3.10 0.00 0.00 4 Q(est) = 2.83 0.00 0.00 0 0.00 0.40 0 Hvlding= 17.53 Q.0[1 0.0f1 0 Tatal A Conip "C" 2.33 0.42 Q--C*I*A= 2.$3 Q(est.) ~ 2.83 Tc (total) = Tc (overland) + Tc (gutter) Te (overland) = Ct*(T..1 *NIS"0,5)^4.6} Ct = 0. 15 LI = Ger►gth DfQverland Ffovv N= friction factor of overland flow (.4 fcar average grass caver) S= average slape af overtand flaw Tc (gutter) = Length (ft.)IVelocity (ft.lsec.)160 B=Bottom rvidth of gutter or ditch Area = d*B+ci"212*(ZI+Z2) Z I = inverse of cross slope ane of clitch Z2 = inverse of crass sloge two af ditch d= depth of f1Qw in gutter (estimate, check estyxnate with Fiow) VV'etted perimeter = B*d+(Ilsin(atn(11ZI))+-llsin(atn(lfZ2))3 Hyciraulic Radaus = R = .AreafWetted Perimerer Velocty = 1.486In*R^.667*s^.5 F1ow = Vel[city'"Area n= 0.0 16 far asphalt s=1angitudinai stope of gatter BOVVSTRINC'i METHOD {TEN YEA.R STORM I]E5T~'rN) PROJECT: V. PLNES L?ETENTiflN BA5IN IJE5IGN BASIlV: BASIN-D REVEEWER: G5M NCTMBER (3F DR7'WELLS PRC]PpSED DATE: 10-C1ct-97 1 SingTe (type ? Dauble (type B) Tota! Area {calc.} (see Hl) 1.17 Time af C onc. (calc.) (see Hl ) 6.99 Cvmpvsite "C" {calc.} (see H1) 0.45 Time af Cauc. (min) 6.99 Area (Acres) 1.17 C' Factar 0.45 Asphalt Area (sq. ft.) 12792 Volume Provided 1040 ❑utflovv (cfs) 0.3 Area * C" Factor - 0.53 #t #2 #3 #4 #S #b #7 Tixne Time Intmsity Q dev. V in V aut Starage Tne. Ine. (min.) (sec.) (ia,.lhr.) {cfs} (Cu. ft.) (cu. ft.) (cu. ft,) r *60) {A*C*#3} (orutf.*92) (#546) 6.99 419.58 2.81 1.47 828 125.87 702 5 300 3.18 1.67 671 90 581 10 G(]U 2.24 1.1$ 873 i$D 693 15 300 1.77 0.93 969 270 639 24 TZflD 1.45 0.76 1022 3647 662 25 1500 1.21 0.64 1043 450 593 30 1800 1.44 0.55 1061 540 521 35 2100 0.91 0.48 1071 630 441 - 40 2400 0.82 0.43 1095 720 375 45 2700 0.74 0.39 1144 SIfl 294 54 3000 0.68 0.36 1122 900 222 55 3300 0.64 0.34 1157 990 167 60 3600 U.6 1 0.32 1199 1080 119 65 3900 0.60 0.32 1273 1170 103 70 4200 4.58 0.30 1322 1260 62 75 4500 0.56 0.29 1365 135(} 15 80 4800 0.53 0.28 1375 1444 -65 85 5100 0.52 0.27 1431 1534 -99 90 5400 0.50 [}.26 1455 1620 -165 95 5700 0.49 4.26 1503 1714 -207 100 bdOQ 0.48 0.25 1548 1800 -252 DRAINAGE PQN7] CAI.CCTLATTONS Required grassy swale pond storage valurne = Impervious Area x.5 in.1 12 in.lft, = 533 cu. fL ~'rrassy swale pond valuxne provvided = 550 DRYWELL REQUIREMENTS - 10 YEAR I)ESIGN STORM Matximum siQrage required by Bawstring - 702 cu. ft. Numher azd type of T}rywells Aequired = i single 0 I?csuhle . TIME QF CO1viCENTRA"I"[ON (mirtutes) Tc (overland) Tc (gutter) Ct = 0.15 L2= 410 Z1= 0.16 LI(A) = 60 Z2 = 50 N(A) = 04 B = U S(tsr) _ 0.02 n = 0.016 s = 0.01 'I`c (A) W 3.27 d= 0.18 L 1(B) 9 0 Tc (gu) = 3.73 N(B) = 0 Tc{P►+B} = 3.27 S(B) = fl Tc{tot.} = 6.99 Tc (1H) _ 0.0 intensiir,y = 2.81 Ar,eas "CPI A*C A _ 0.80000084 )w= 9.1127 0.29 0.9(] 0.261 R= 0.0878 4.88 0.34 4.264 V= 1.83 0.00 4.00 0 Tc(ga) = 3.73 0.40 0.00 0 Q{est} = 1.47 0.00 {1.0[1 0 0.40 0.00 a Hvlding- 14.61 0.00 0.00 Q - Total A Comp "C" 1.17 0.45 Q=C*I*A= 1.47 Q(est.) ~ 1.47 Tc (tatal) _ Te (nVerland) + Tc {gutter} Tc (overlarid) = Ct*{L 1 *N15^0.5}^4,6) Ct =0.15 L 1= Length of QverIand Flow N = friction faetUr a£ overland £low (.4 for average grass couer) S = average stope of overland flow Tc (gutter) = Leno (ft.)Nelocity [ft.lsec,Y60 E= Bottvm width of gwtter or ditch Area = d*II+d^2A2*(Z1+Z2) Z i= inverse of cross slape ane of d.itch Z2 = inverse of cross spope two of ditch d= depth caf flow in gatter (estimate, check e;stimate with Flow) Wettei perimeter _B*c+( llsin(am(11Z I)}+ 11sin(atn( l fZ2))) Hydraulic Radius = R= AreafWeetttted Perinter Velocity = 1.48614*lt^.567*s^.5 Flow = Vetocity"Area n=(1.01 6 for asphaTt s= P4ngitudina.l slope of gutt,er BQWSTRTNG METHOL] (TEN YEAR STC?RV[ ~']IESTCrN) PROTECT: V. PINE5 ❑ETENTd(JN SASLN DESI .C`aN BASIN: BASIN-E REYCEW'Ek: GSM NU1►rISER OF URYWELLS PRCJPUSET) DATE: Y O-Oct-97 0 Single {type A l DoubIe (trype B) Tata1 Area (calc.) (see Hl) 2.43 Time vf Cvnc. (caFc.) {see H1) 5.64 Composite "C" (ca1G. ) (see H 1) 0.41 Tin2e v£ Gonc. (min) 5.64 Area {Acres} 2.43 C' Factcar 0.41 A,sphaJt Area {sct. ft.} 19802 Volume PraVided 1127 {7utflcaw (cfs) 1 Area $ C" Factor 1.40 #1 #Z 93 #4 45 #6 #7 Time Tirne Intensity Q dev. V an V out Sivrage Tnc. Inc. (myn.) (soc.) (irr.lhc.) (cfs) (cu, ft.) (cu. ft.) (cu. fc.) ! *60} (A*C*#3) (C7utf.*#2) (#5-#6) 5.64 338.31 3.06 3.06 1386 338.31 1[}47 S 300 3.18 3.18 1277 304 977 10 600 2.24 2.24 1600 600 1004 15 900 1.77 1.77 1795 900 895 24 1200 1.45 1.45 1905 1200 745 25 1500 1.21 1.21 1952 1546 452 30 1800 1.04 1.04 1930 1800 190 35 2100 0.41 0.91 2014 2106 -86 44 2400 0.82 0.82 2050 2400 -340 45 2700 0.74 0.74 2081 2700 -619 50 3000 0.68 0.68 2116 3000 -884 55 3300 0.64 0.64 2183 3300 -1117 60 3600 0.61 0.61 2264 3600 -1336 65 3904 0.60 0.60 2407 3904 -1493 70 4200 0.58 0.58 2500 4200 -17()(] 75 4500 0.56 0,56 2582 4500 -1918 80 4800 0.53 0.53 2602 4800 -2198 85 5100 0.52 0.52 2709 5100 -2391 40 5400 0.50 0.50 2755 5400 -2645 95 5700 0.44 0.49 2847 5700 -2853 100 6000 0.48 0.48 2432 6000 -3468 DRAINAGE P[7N17 CALCULATTQNS Required grassy swale pvnd storage valume = Impervious Area x.5 irs.l 12 in.fft. = 825 cu, ft. Grassy swale ponci volume provicled = 832 DRYWELL REQTJIREWNTS - 10 St EAR DESIGN STORM Maximum storage requu-ed try Sowstring = 1047 cu. ft. Number and type of Drywells Required = 0Single 1 I]aubFe TrnE OF CaNcENTxATIc+N (minutes) T"c (overlauid) Tc (gutter) Ct = 0.15 L2= 426 21= 0.16 L1 {A} = 60 Z2 ~ 50 N(A) = 0.4 S = U S(A) = 0A2 n = 0.016 s = [1.flZ2f Tc (A) = 3.27 d = 0.20 LT(B) = 0 Tc {gu} = 2.37 N(B) = fl Tc{A+8} = 3.27 S(B) ~ 0 Tc(wt.) = 5.64 Tc (B) ~ 0.0 Tnteasity = 3.06 Areas „C" f1*C A = 1.02336432 WP = 10.3066 0.45 0.90 0.405 R = 0.4993 1.48 0.30 0.594 V = 2.99 0.00 0.40 U Tc(gu) _ 2.37 0.00 0.00 0 Q(est) = 3.06 i].a0 0.00 0.00 0.00 4 Halding = 15.18 0.00 0.00 Tota1 A Comp "C" 2.43 0.41 Q=C*Z*A= 3.06 Q(est.) = 3.06 Tc (total) = Tc (oveckand) + Tc (gutter) Tc (ouerland) = Ct*(L I *N15''0.5)10.6) Ct = 0.15 L1 = Length of O►ferland Flow N= frictian factor of overland flow (A for average grass cvver) 5 = average slope of averland flaw Te (gutGer) _ Leng¢h (fL)IVelocity (ft.Isec.)I60 B = Bvitam rvidth vf gutter or ditch Area = d*a+d"212*(Z1+22) 21 = inverse of cross slape ane af ditch z2 = inverse of cross slcape two vf ciitch d=depth o£ flow in gutter (estirate, check estimate with Flow) WettQd perimeter =B*d+(1lsin(am{l lZ1})+1lsin(atn(1 fZ2))} Hydraulic Radius = R = AreaIVVetted Ferimeter Velocity = 1.4E6In*R^.667*s^.5 FPovv = Veiocity*Area n = 0.0 16 for asphalt s=1angitudinal slvpe of gutter BC3WVSTRING MMTH[.7L7 (TEN YEAR STQRM UESZGIV) PRO.TECT: V. PINES DETENTIDN BASIN DESIGN BASIlN: BASIlyT-F REVIEWER. G5M NUIVfBER C3F DRYWELLS PROFOSET] DATE: 10-C3cte97 i Single (type A 0 Dauble (type B) Tvtal Area (caPc.) (see EIt) 1.29 Time vfCvuc. (calc.) (see Hi) 5.00 Composite "C" {calc.} (see H1) 0.39 Time of Conc. (min) 5.00 Area {Acres} 1.29 C' Factnr 0.39 Asphalt Area (sq. ft.) $741 V41ums Pravided 750 [3utflow (cfs) 0.3 Area * C" Faccvr 0.51 #1 92 #3 94 #5 #6 #7 Time Time Intensity Q dev. 'a in V out Storage T,nc. iric. (min.) {sec.} (in.Ihr.) (cfs) (cu. ft.) (cu. ft.) {CU. ft.) {#3*64} (A*C*#3) , (Outf.*t#2) (#5-#6) 5.00 .300.00 3.18 1.61 648 90.00 558 5 300 3.18 1.61 648 90 558 1Q 600 2.24 1.14 797 180 617 15 900 1.77 0.90 899 270 629 20 1200 1.45 0.74 957 360 597 25 1500 1.21 0.61 983 450 533 30 1800 1.04 0.53 1003 540 453 35 2100 0.91 0.46 1016 630 386 40 2400 0.82 0.42 1040 720 320 45 2700 0.74 0.38 1051 810 241 50 3000 0.68 0.34 1069 900 169 55 3300 0.64 0.32 1104 990 114 60 3600 0.61 0.31 1145 1480 65 , 65 3900 0.60 0.30 1217 1170 47 70 4200 0.58 0.29 1265 1260 5 75 4500 0.56 0.28 1347 1350 -43 80 4840 0.53 0.27 1317 1440 -123 85 5100 0.52 0.26 1371 1530 -154 90 5400 0.50 0.25 1395 1620 -225 95 5700 0.49 0.25 1441 1710 -269 100 6000 0.48 0.24 1485 1800 -315 DRAINAGE POND CALGULA'TICJNS Required grassy° swate pond storage volume =Impervious Area x.5 in.l 12 imlft. = 364 cu. ft. Grassy svvaie pemd volume provided = 375 DRYWELL REQiJIREIVLENTS - 10 YEAR DESTGN STORM Maximum stvrage required by Bowstring = 629 cu. ft. Number and type of DrywelLs Required = k Single ; 0 Uorubte rrnvIE oF caNcErrTRATrorr (minuces) . Tc (overIand) Tc (gutter) Ct = 0.15 L2= 260 Z1= 0.16 LI(A)= 64 Z2 ~ 50 N(A) _ 0.4 B = Q S(A) = 4.02 n = 0.016 s = 0.0226 Tc (A) = 3.27 d = 0.16 L I(B) ~ +0 Tc (gu) = 1.70 N(B) = 4 Tc(A+B) = 3.27 S(B) _ 0 Tc(tot. ) = 5.40 'I'c (T3) = 0.4 Inten,sYty = 3.18 Areas "C" A*C A ~ 0.63165711 VV? _ $.0973 4.20 {].90 0.1$ R = 0.0780 1.09 0.30 0.327 V = 2,55 0.00 0.00 4 Tc(gu) = 1.70 0.00 0.04 U Q(est) = 1.61 D.0(? 0.00 U 0.00 0.00 o xmiding = 9.26 0.00 0.00 0 Totai A comp „C" 1.29 0.39 C=C *I*A= 1.51 Q(e.st.) _ 1.61 ' Tc (total) = Tc (oVerland) + Te (gutter) Tc (averlaud) = Ct*(L l *NIS"0.S )'Y].6} Gt ~0. 15 LT = Length of 0veriand Fiow ~~frictian facwr af averland flow (,4 far average grass caVer) S= average sZoge of overland flovv ?c (gutta) _ Length (ft.)1Velocity (ft.fsec.)160 B=Bottcrm vyidth of gutter or ditch ts►rea = d*S+d"212*(Z1+Z2) Z 1= inaase of cross slope one of diteh Z2 = inverse af eross slope two of difch d= cepth af flow in gutter {estunate, check estimate with Flow} Wetc~ perimeter = ~*d+(i/s~(atn(lrzi))+ 1/si~(atn(lrZ2))) - Hydraulic Radius = R= ArealWetted Perianeter Velocity = 1.4861n*R^.667*s^.5 Flaw~ = Velacity*Area n= 0.016 fvr asphalt s=lvragitudinal slope of gutter gawsTR.IrrG METxaD (T~N YEAt sToRM DEs~GN) PRo.rEcr: - V. PINEs DETEIV'TI(]N BASiN DESIGN BASIlV: BASIlN-G REVIEWER: GSM I►1LTM$ER [3F DRYWELLS PRaFQSEL] nATE: 10-Qct-97 1 Sigtgle (type A 4 Dvuble (type B) Tata! Area (calc.) {see H1} 0.57 Time o£Canc. (caPc.) (see Hl) 5.00 Camposite „C" (ca1c.) (see H1) 0.46 Time of Canc. (rrtin) 5.00 Area (Acres) 0.57 C' Factor 0.46 Asphalti Area (sq. ft.) 6553 Valume Provided 590 Qaatflaw (cfs) 0.3 Area * C" Factor 6.26 #1 #2 #3 #4 #S #6 #7 Tiane `C`iuae Interasity Q dev. V in V vut Storage Inc. Inc. (min.) (sec.) (in.llhr.) (c£s) (cu. ft.) (cu. tt.) (cu. ft.) (~#1*60) (A*C*#3) (Outf.*#2) (#5-#6) 5.00 3[]0.00 3.18 0.83 334 90.00 244 5 300 3.18 0.83 334 94 244 10 600 2.24 0.58 410 iSo 230 15 900 1.77 0.46 463 270 193 24 120{} 1.45 0.38 493 360 133 25 1500 1.21 0.32 506 450 56 30 1800 1.04 0.27 516 540 -24 35 210{} [].91 0.24 523 630 -107 40 2400 0.82 0.21 535 724 -185 45 2700 0.74 0.19 541 81a -269 50 3{900 0.58 0.18 551 900 -349 55 3300 0.64 0.17 568 990 -422 60 3600 0.61 0.16 589 1080 -491 55 3900 0.60 0.16 627 1170 -543 70 4200 0.58 0.15 551 1260 -609 75 4500 0.56 0.15 673 1350 -677 80 4800 0.53 0.14 678 1440 -762 85 5100 0.52 0.14 706 1530 -824 sn 5400 0.50 0.13 718 1620 -902 95 5700 0.49 0.13 742 1710 -968 100 6400 0.48 0.13 764 i$oo -1036 DRATNAGE FpND CALCULA'I'IQNS Required grassy swaPe pand storage Volume = Imper•vious Area x.5 in.l 12 inJft, _ 273 cu. tt. Grassy swale pond volume pravided = 295 DRYWELL REQUZRENtENTS - 10 YEAR DESZGN STORM Maximurn stvrage required by Bowstrang = 244 cu. ft. Number and type af I?rywe11s Required = I Single 0 Double TTME C3F CC7NCENT°RATIDN (mirxutes) - Tc (nverland) Tc (gulter) Ct = 0.15 L2- 160 Z1= 0.16 L1(A) = 50 Z2 = 50 N(A) = 0.4 B = U S(A) = 0.02 a = 0.015 s = 0.0335 Tc (A) = 2.93 d = 0.12 L.Y(B) _ 0 Tc (gu) _ 1.07 - N(B) = fl Tc(A+B) = 2.93 5(B) = 0 Tc{tot.} = 5.04 Tc (B) = 0.0 Intensity = 3.18 Axeas "C" A*C A = 0.331683 W = 5.8676 0.15 0.90 0,135 R= - 0.0565 0.42 0.30 0.126 u = 2.50 0.00 0.00 0 TC(gu) = 1.07 0.00 0.00 4 Q(est) ~ 0.83 0.00 aoa 0 , 0.00 0.00 0 Hold'uag = 5.70 ' 0.00 0.00 0 ~otai A Comp "C" 0.57 0.46 Q=C*I*A= 0.83 R(ess.) = 0.83 Tc (total) = Tc (averland) + Tc (gutter) Tc (ouerland) = C#*(L 1 *N15'°0.5".6) C# _ 15 L I = Length of Overland FFow . N= friction factor of overland f1ovW (.4 £ar average grass cover) 5 = average sloge of oueriand £low Tc (gatter) = Length {ft.}Nelociiy (ft.lsec.)/60 B =Battom width of gutter or ditch Area = d*B+d^212*(ZT+Z2) Z I = iaverse of cross slope one of ditch Z2 ° 1riV8tSe of CI'I35S 5lope t'VdU of d1tCh d= depfh of flUW Il'l gEIttCT (e.5tliZ3aLe, CheCk PSLiniaie V4+1th FlOw) WeLL~per11Y1eteP= B*d+(I/$lii(atn(Z/Z1))+L/511](3f11(~/Z2))} Hy'draZ1l1G R3d1u5 = R = ATTeafWetted P@TIITietEI' v~locity= 1.486rn#R^.667*5^.5 Fi~~ ~ ~~locity*Area m= 0.016 for asphalt s=longitudinaP slope of guttec SC]WSTRINCi METH(.]L? (TEN YEAR STORM DESIGN) PRaTECT: V. PTNES DETENFI(]N BASTN LlESI4iN BASIlV: BASIlN-H REVIEWER: GSM NUMBER. ClF URYWEC.LS PRDPOSED DATE: 1tl-Oct-97 I 5 ingle (dype.4 0 Double (rype B) Tatal Area (calc_) (see H 1) fl. G$ Tirrte of Conc. (calc.) (see H1) 5.00 Composite "C" (calc.) (see HY) 0.53 T'ime af Canc. (mirt) S.(!fl Area (Acres} 0.68 C' Factor 0.53 Asphalt Area (sq. ft.) 11124 Voiume Pravided 93$ Outflaw (cfs) 0.3 e4rea * C" Factor 0.35 #1 #2 #3 #4 #5 #6 #7 Time Time Tntensity Q$ev. V in V qut Stvrage Iic. Tnc. V (min.) (sec.) {in.lhr.} (cfs) (cu. ft.) {GU. flt.) 4cu. ft.) (#1*60) (A*c*#3) {Outf,*42' (#5-46) 5.00 300.40 3.18 1.14 460 90.00 370 5 306 3.18 1.14 460 90 370 10 COQ 2.24 0.81 566 180 386 15 900 1.77 U.64 638 270 368 20 1200 1.45 0.52 680 360 320 25 1500 1.21 0.44 698 4547 248 30 1800 1.04 0.37 712 540 172 35 2100 4.91 0.33 721 630 91 40 - 2400 4.82 0.30 739 724 19 45 2700 0.74 0.27 746 810 -64 54 3000 4.68 0.24 759 990 -141 55 3300 4.64 0.23 784 990 -206 60 3600 4.61 0.22 813 1080 -267 65 3990 0.60 0.22 964 1170 -306 70 4200 0.58 0,21 898 1260 -362 75 4500 0.56 0.20 428 1350 -422 SO 4800 0.53 0.19 935 1440 -505 85 5100 0.52 0.19 974 1530 -556 90 5400 0,50 0.18 990 1620 -630 95 5700 0.49 4.18 1023 1710 -687 140 6400 0.48 0.17 1454 1800 -746 DRAINAGE POND CALCLTLATTQNS ~ Requirecf grassy swale pond storage vcalume - rmpervious Area x.5 in.l 12 in.lft. = 464 cu, ft. Grass}+ swale poad volvme proVided = 469 DRYWELL REQtiIREMENTS - 10 YEAR DESrGN STOR1bC Macimum storrage required by Bawstring = . 386 cuu. fL Number and type of I]rywvells Require3 = 1 Single 0 Double TrnE oF eONcErrTRATIor~ (minutes) T~ (~ver1and) r~ (gutter) Ct _ 0. r s L2_ 160 zl= 0.16 Lr (a) = so Z2 = so N(A) = 0.4 B = a S(A) = 0.02 n = 0.016 s = 0.0335 Tc (A) = 2.93 d = 0.13 L 1(B) = 0 Tc (gu) = 0.98 N($) = 0 Tc(A+B) = 2.93 S(B) = 0 Tc(tot.) = 5.00 Tc (B) = Q.i] Intensity = 3.18 • Aaeas "C" A*C A = 0.42059787 6.6074 4.26 0.90 0.234 R= 0.0637 0.42 0.30 0.126 V = 2.71 0.00 0.00 0 Te(gu) = 0.98 0.00 0.00 0 c~(est) _ 1.14 4.00 0.00 0 0.00 4.00 (D Halding ~ 5.70 0.00 0.00 0 To#a1 A Cnmp "C" 0.68 0.53 Q=C*I*A= 1.14 Q(est. ) = 1.14 - Tc (total) = Tc {oVerland} + Tc {gutter} Tc (averland) = Ct*(L 1 *NlS"0.5)"0.6} Ct = 4.15 L1= Length of (heriand Flow N= friction factor of overland flnw (.4 for average grass eover) S = average slvpe of overlazid flow Te (gutter) = Length (ft.)Nelociry (ftJsec.)I60 g= Bottom width of gutter or ditch Area = d*B+d^212*{Z1+Z2} Z 1= inverse of cross slvpe rme of drtch ZZ = s`nverse of crnss sPope twv of dbitch d= depth of flvw in gutter (estimate, check estimate with FIow) Wetted perimeter = B*d+(Ilsin(am{YIZl})+llsin(atn(1122))) Hydrautic Radius = R = ArealWetted Perimeter Velocity = I.4861n*R".667*s'".5 Flow = Velocity*Are,a rn =0.016 for asphalt s=langituciinal slope of gutter a[JW~TRJNG METHOD {TEN YEAR ST(JRM I)ESTGN} PRU7ECT: V. PMS DETENTZC3N BASIN DESIGN 8A51N: BASIN-3 RE'VIEWER: GSM NUI~IBER o~ ~~~LLs PROPoSED L)ATE: 1 [1-CDct-97 o single trypeA I noubi~ (type B) Total Area (calc.) (see Hl) 1.21 Titne of Cvac. (calc.) (5ee HI) 6.06 compQsiae «c" (C&IC.) {5ee I$1} 0.34 Tirne ofCortC. (min) 6.06 Area (Acres) 1.21 {C' Factar 0.34 Asphalt Area (sq. ft.) 414$ Vo1ume Provided 352 Ouiflow (cfs) 1 Area * C" Factor 0.42 #A 42 #3 #4 #5 #f #7 - 'I'ime Time Tntensity Q dev. v in V out Stosage Enc. Tnc (min.) (sec.) {in./hr.} (cfs) (cu. ft.) (cu. ft.) (cu. ft.) 1 *60} (A#C*#3) (Outf.*#2) (#5-46) 6.06 363.51 2.98 1.24 606 363.51 242 5 3(]0 3.18 1.33 533 340 233 10 6(}0 2.24 0.93 676 600 76 15 940 1.77 0.74 756 900 -144 20 1200 1.45 0.60 800 1200 -400 25 1500 1.21 0.54 819 1500 -581 30 1800 1.04 0.43 834 1800 -966 35 2100 0.91 0.38 844 2100 -1256 40 240{} 0.82 0.34 863 2400 -1537 45 2704 0.74 0.31 871 2700 -1829 54 3400 0.68 0.28 886 3000 -21 E4 55 3304 0.64 0.27 914 3300 -2386 60 3600 [}.51 0.25 947 36€10 -2653 65 3900 0.60 0.25 1007 3900 -2893 70 4200 4.58 0.24 1046 4244 -3154 75 4500 0.56 0.23 1080 4500 -3420 80 4804 0.53 0.22 1088 4800 -3712 85 5140 4.52 0.22 1133 5100 -3967 30 5404 4.50 0.21 1152 5400 -4248 95 5700 0.49 0.20 1190 5700 -4510 100 6000 0.48 0.20 1226 6000 a4734 DRAINA GE F'ONI? CALCULA,T~ONS Requireci grassy swale pond storage valunne =Impe.rvious Area x.5 in.l 12 in.Ifk. = 173 cu. ft. Grassy swate pond valume prrvided 176 I)RYWELL REQUIREMENTS - 10 YEAR DESIGN 5Tt)RM Maximum storage requued by Bowstring = 242 eu. ft. Nwnber and type of I7rywelLs Required = 4 5ingle 1 I]oubFe TIl1E OF CC]iVCENTRATTON (minutes) Tc (averland) Tc (gutter) Ct = 0.15 L2= 330 21= 4.16 GT(A) = 50 Z2 = 50 N(A) _ 0.4 B = 0 S(A) _ (}.02 n = 0.016 s = 0.01 Tc (A) ~ 2.93 d = 0.17 Ll(B) = D Tc (gu) _ 3.13 N(B) - 0 Tc(A+B) = 2.43 S(B) _ 0 Tc(tvt. ) = 6.06 Tc (B) = 0.0 Int.ensity = 2.98 Areas "'C" A*C A = 0.70365075 RVP = 8.5463 (}.09 0.90 0.081 R= 0.0823 1.12 0.30 0.336 V = 1.76 [}.00 0.04 0 Tc(gu) = 3.13 0.40 0.04 U Q(est) _ 1.24 4.0[} 0.00 0 0.00 0.00 a Hoiaing = 11.76 6.0(1 0.(10 0 Tcrtal A Camp "C„ 1.21 0.34 Q=C*I*A= 1.24 _ Q(est.) = 1.24 Tc (total) = Tc (overland) + Tc (gutter) Tc (overland) - Ct*(L 1'KN1S"'0.5)^0.6} Ct =0. 15 L 1=Length of dvecLs.nd k`low N= frictiran factar of overiand flow (.4 for average grass cover) S= average siope v£ overland flaw Z`c (gutter) = Length (ft.)1Velacity (ft.lsec.)f60 B= Bottorri width of gutter ar ditch A,rea = d*B+d^2!2*(ZI+Z2) Z1= inverse of cross slope one of ditch Z2 = inverse of crass slope twa of ditch d= depth of flow in gutter (estimate, check esimte with Flow) Wettei peri.naeter = B*d+{Ylsin(ata(1121))+IIsin(ata(1122))) Hydraulic Radius =1t = lArea/iN~ Perimeter Velocity = 1.4861n*R^.657*s^.5 Flow = Velocity*AArea a= 0.0 16 iFOr asphalt s=langitudinal slcfpe of gutter 8~5, r~ A ~VJA LE .r4 c ~mp6pviaUs Ar~6.A, 3 I30 .e(. r-Fz" Pe$2e-z "E PA (s~+hy C 4" ~ Z+4()(Zo) ~ Z 37-o +4 z' +a+u 5w►aL4 A94A RLCQ' o _ 5:50 f ~ 4se ~Ft ~ I Z, ~ ~ SwAtC- ARdA PR-ov"o = lCt• sf X z5' ~ 4-GL S f4 ~ ~ &S Sv)AL-,c A Z, 1 MPEP_v+ oO-S ,4 R~-A : PERi2INF- R[]AD (S-TQ 5'WA L-F_ 49E-A )LEG7'D-z 34-7.0 r Z,65 'F4 t L , :W~~ AOZEA PRoVt] = i5,S' x l9.' ~ Zql~.5 a,cc- lo+--s zL qjA z4 ) 61-c.k I ISwaL~E P 3 rmpoeRvrau-5 ARg-#~ Pe-Rpit.1s iw (s-rA ! t4'k A VE [ 5rA O+va -Y ~ `~'i Y )C Z~a' = Z$ 3 l a +'S` '~f rZ+' A►.~ (.5" - 1400 5 a +00 Y&)(d, s I ooa. oo f4 z,. :i4►9 L 5wALL ARCA REQ'O ' -+GRZ- ~ ~p+ ~ Swa 6 pRZ-4 PR*lj'v z Z-4' x Z-i' . ()t Cn )WVS Cu~-b rajurA) DRAirJAC-.E - "ZaB" GAI.(-uCA?)ONS BAsIIJ 3 SWA(-f c3- I ~rnv~av~o~s naE~ L ~♦;ary''~•~ PERR Ini E F?oa D(STr1 3 t 35 ~(o+ Z5~ C~~ ~ 580D C'1'y W:uy~jj NNN~j W"M~iG s~sg < SWA~f AR6A REc~a~O - 58QO : 483 f4 Z" ~ 5wAZ6 AREfl ?RO%I'.D = Zg-~ x Z'+' = 410 a /h i►JV5 CvRg RElvtznJ A RE A, `~t DP,QIOAe.,E Z06 " 6,4,LcuLa Ti BAsw c- '5W,~ Lr, C,- f CvL - D£ - 5 a c. ('/ty rr )(45 PERQ iN~ rzoA~ 65-rq I t 4s - 3 +35 y?~ - 3500 Eaw ly~~ d AagA RE~ fl=(a`3 8!~ ~ S$z. Z [`L-~ ~ SW aL-4- A REA PeaJb ZC.` x Zf", ~ 1n dWAS Cur6 M+vrn GieerX ~ ~ 5 L.!!p C. ig Z {M~ERVlc3rl5 AR$ A 13'+ R VLc ,,lu-E (5'TA 0 + 00 - I + 3 a 7-0ZwU F4 'SwAoaE ~giEp 940'L1 s 7/aOO ^ Zt j t 7- - SGIAL-c pREy4 PpaV'0 = 15, xIstc 2Z5 5w,a~E C- 3 rmPlfAvtuvs AZIEA , 13¢k AvEsJu16 5fiA 1+310 - Z4 44.(*0 -z z89z, -F4~ c41~- -D~c -sA~ C'fz)~r~~C45~} = 3(a4F4z 1?6 et4 ccyjm=r (sTA f +,+S ` 3+ 4a~C~' 3loo f-+ ~ . 7- 5wALf- AREA R6ct',D s 'Iqq3 d Z. 5waL-6 A e.c A PtzoJ'o = -3o X. 31 - ig44 (k M1 W5 [ur6 ~'~dri1 GZrC~ ) DklprrJAGE Z08 5WA L6 D i a~~~~~ IMPE-aVIOVS 1AkE A - . n NN `944' AV6pJQ6 (5$1q C7-FoL7 r f#1~ 1~~ ~ ~ zZC]D F+ ~ !Vwn Z~Aa F# 1~ _ SwALE PROV 10,69 = f o' rL Zo' _ = Z 00 '~4 z' ~ s~-e. S ~r~►~ ~ ~ blo~.~ ~ ~ 5w~~6 PS- ~ lfnPC-OVSnus Agc-A ~ WNa PpGg: AvE (STA 3+40 - 44Z3.mi )~zo' ) a P!o64 145 9t, F4 g° I3rt4` pvEAru& (5tR 4+10 S ~ f-5& .0)(7.") 89 3Z f~ 1Q5ciZ- F+T~ ~ 8~.3 3 f+ 7-' ,5mt-e PROvIOE~ ~ ;347"v 30' - ~ -$c c, L.O+s z ~ ~ C712A es•]R6e 12kk)rP...EMEns'r'S BA-s 10 . a~a Ofz] C rr)(4s) r ~4 z- Rve'16 c`Z-r (5-ra r++ s - ~++0~l~Z~ ~ - gloo • .4o+a l - 74081 f4 7- ~ ~WAC-6 aRc A 2~& , r.> f 4 Z" _ Sct r ~-f ~ 5wAL~r-- A f~ -P Peov' v - 2/" x. Lea' T 5 .1 c+ -F t~ * m1,4us cvwe ctr-~) 5wAL~ imPeRVlous A P,6A I$4~` ~ v6 N~ (-3T'A Z # 44',coa - 4 +ZL• $ ~ ~ (7-7 ) 134, A U~~V€ (s-rA J4+Z7-. 8Cv Z~ ~5 4-4 a~ L Z' '5 w.4 L E A P€1A Fz L-a' p ~ SG 40 f'4 I?~ SWRL6 Ppa►j'a i Zi x- 77-' = 4 8 4 P ~ 5+wA c CUL- vE - sAC ( ~/z.~ ~ ~ ~(~~),L, ! fi42" Wk,sPOE OR, 1+45- 3f,Fo)(zo' ) - 3~~ z- z- -5wA~ A96A *o6 / ff7- ~Z- sL-4L-C- IOR4-CA Pftv'n ~ 30 • xZ3'= /p 04- ft~' . . ~ OC' m[4Ji11s Cfr10 f"E+ir!'E'1 C, J DR~106i ~ "ZOS" REau►-er-►njErJTS - ,5w~ LF- F - ~ I►-APERv?vu5 A eEA cu I -~q c. ~lz(Tr}~~~~~' - 318 1 IF4 tvA,FpJr, raod (540L P-f 4S - +Z3.o i )(Z-o 8 -4- 4-1 ,F+ ~ ~ ~ SwuALE Ag6A 2EU"D - 6441 r~f~- ~ #ZS F4 ~ f Z- 5v.44 r.-F- Ftvv',D = ZS ' x 30~ 5e-e fa-ks !f ~n~ S~ Bloc.~ d I3 R5 d F.1 " & t I MnEKVi aw5 A RC-A ' wa4'PPC.E pcai9o CSrA 4+z3.vt - G f3~~(zo') = 41,40 f 4?-0' dZ+~' AveNuE (srta ~4 a$.I 'I - SiF~.6-5 Y zo' Z4I3 -RL- +Q-6( ~ 6o 'S 53 ~4 z- 5 WARR-c- A eLco' 'F-- ~ - rZ~ 5,,,nLF- AR6A PRQV'D x cA.u~ e,~~~ r~~~ ~ar-c~ ~ PR~~~~ 6,E- BAs+a H ~5;w aL-E ~ ul~~~ ;."w rrVu~PPL.E AvE (sTA I+z2,0i (to') = 4! 3cl. 90 ,~rf lZoj'' ,p,~ep4ut 3+4c~ - c499. 19 ) ( zo ,~~xw=rssr~G . z -3. 5wALE ,pgr=,q REGae!? 17-3- (o 4 5-w f-f ~ I Z, ~ - SWRLE pft6,A PRoV.`v Z•3e -3 Z- = 13$ ~ (A'i~rn~s euRB ,R~avRnl ~1~~ ~ -5 c_e !;wAWE AvEu~~ (-5-ra 1t+r,59 - 3+49)(ZOCP") ~ $14$. ~ ~ ~ 5VJALE APEA R60'D ~ 4148 17- SwaLE .agiA PROVD ; [Gk zz. = .35Z- ~~a5r►J "~d`~ 5'wA Lf A ~ ~f$.,S'ic Z5')(o5' c4,- p fh ~ - Z3f, ZS -~4~ A-Z (15.5'x 111(0•5'd,p-t~,) Za ;f~ nnNMVi+n Z4' k z}' Y r. ~ep-Lh ) = &-13 F-+3 C~} 5 'v~'eS ~ PY't31IIOk ~ = to zd • f ^i W~ [ , ' iPG A -+Z F# 3 ~ ~ 5wAL& B--d '(24+! x Z4' 1,0 490 IF-+ -~D +a~ 490 43 +1pe- -}0+40 rrt' d 5wALS x Z-C.' )(O,S` ~ -F+ 3 sw.~c.~ • ~ f ~ !5 ~ ~d. -5' J, p+k ~ - f I 7-. 5 54dPGE c.-3 x 3i ` 0` d, P,+~• ~ - +044a 4PfaV'd' = f 251 15~+-4 w/ {43 SWpL6 D-1 ~ (a" )L 7-c' o ~ep+ 5 WPc.F- D - Z. x -3o' 1• 0' dep tl-, L700 3 4,a4-al pro tld = f000 J~WI ~ 'Fype la df+%jw-e-dj D;?ArrJAGE ~ PDrj~ Voiwm E e As..CvL-A71a r~s 5wp~~ ~ - ~ • ~ ~c~` ~ ZG` )C0-s` drp+k t ZZ' x T.z' 0 5' = Z$ z 3 5wa~4 r- - 3 ° C ~o' - p+k D 4 ;4 3 Gt`~ rov'd -~f~ W/ l4\t F~ F3 k P ~'•aw`ur (0fir 7; f+3 ~ ~ ~ 5w~r~ ; ~ZS~x 2jv I.s~' ~f-P+~-. 4K 4o ~a I P,-Cv'cl cr t t,f p e- A u.rc l ~ + o4-a.I r°~'.k = 6OZ9 -Ft ~ SwpL~ G- [ r c.' x Zo' ~C ~-o' dep f1, ~ - 590 4-o+,x I prv'd s i5Ro T7+' wl I +,tp e. R r.~►-~w~I ► 4b-b, 4 re,&'d~ a 4 -F+3 OASlo ~l gwwL E 14-1 37,. x-a,z)( i.v'depfk F43 +OTAC pVOv'ol = 938 TT3 WI ~ ~pe~ A ~°~,WG1[ ta+a l rc,~e[ = 38(a W3 SeNALf x ZL' )(1-c++ cAep4k ~f - -35Z F-+ ~ +o+al p►av'd wt Ja -~~a i ,^e%'cl' = Z-lt Z ;45 CURB DROP CALCULA'FIONS A l - Sta 2+61 Perf°ine Raad . Top af Lurb Elevation = 2{]60.25 Gutter Elevation = 2059.75 "208" Flavr Elevation = 2053 08 C-rutcer szope = 1.51% Area of Basin = 2.19 ~cres Area t~ Wet = a 73 acre5 Peroent Area = 33°lQ . Affectei 4 (QCotal)*(Percent) q = 2.50 x [}.33 = 0.825 31$ d = [(nxq) 1 (0.55x Z x 450) ] 3IS d=~ 4 0.014 x 0.825 } 1( 0 56 ac Sa x4D.U1.5I } d = 0. 12 Capacity f ft= 0.075 ( See Figure 16 } Length Req'd = d,$ZS 10.075 = 11.00 ft ' Therefore: Use three (3) curb c#.rvps at 4,-0„ A2 - Sta 4+32 PetY-ine Road Top of Gurb Elevation = 2057.86 Gutter Elevation = 2057.36 "20$" Flcor Elevation = 205669 Gutter Slope = Il .D6°r'n Area of Basin = 2.19 acres drea ta Wet = 0.46 acres P"erCetlt Aiea = 2 1% Affected Q (Qtntal)*(Perc.ent) q = 2 50 x 0.21=0.525 3f8 d=~(nxq) 1(056x Z x4So) l 31$ ) . d = { ( 0.0 14 x 0.525 } 1 ~ 0.56 x 50 x 40.0106 d = +6.11 Capactty 1 fk = 0.07 { See Figure Id ~ Lengcn Req'd = a 525 t a 07 =7.s0 ft T~ereF4re: U5C diIeE (3) Ci1rb drop5 a4 2'-6': A3 - Sta 5+85 Per,rine Road Trsp of Cutb Elevation = 2056.23 Gutter Elevation = 2455.73 "208" Floor Elevation = 2054.56 Low Point Flaw to Wet _ 2.50 G.f.s. Capacity 1 ft _ 0.37 ~ See Figure 17 ) Lengtb Req'd = 2 50 10 37 = 6.75 £t T'herefore; Use three (3) curb drops at 2'-3" B 1- Sca 5+85 Perrine Road Top vfCurb Elevation = 205 6 23 Gutter Elevation = 2055.73 "20$" Floor Elevation = 2054.56 L,ow Paint Flcsw to Tailet = 0.83 c.f.s. Capaciiy f ft = 4.37 ( See Figure 17 } Length Roq'd = 0.$3 J 0.37 = 2.24 f} TYceaefbre: Use one (1) curb drop at 2'-3" C 1- Sta 2+95 Perrine Road Top of Curb Elevation = 2[}59 7i Gutter Elevation = 2059.23 "208" F1'oor Elevation Y 2058.55 ' Gutter S lope = 151% Area of Basin = 2 33 acres Area to Inlet = 0,84 acres Percent Area = 36°/0 Affeded q = (Qtotal)*(Percerct) q = 283x 0 36 = 1019 3I8 d = [{nxq} 1 (O.SGx Z x 45o) 1 318 } d _ 0 014 x 1019 0.56 x 54 x 40.0151 d = 0 13 Capacaty J ft = 0.09 ( See Figure 16 ~ Length Re,q'd = 1.019 1 0.09 11.32 ft `Iherefare: Use three (3) curb dmps at 4'-4" C2 - Sia 1+30 13th Avenue Tap af Cuurb Elevation = 2057 36 {'rutter Elevation = 2056.86 "208" Floor Elevation = 2056.I9 Gutter SIape = 1 UO°/fl Area of Basin = 2.33 acres Area ta Inlet = 0.30 acres T'€rcent Area = 13% Affected Q (¢toW)*(Percent) q=233x0.13=0.3[l3 318 d=[(nxq}1{a.55xZx4So}I , 318 d=[{ 0.414 x 0.303 )1( 0.56 x 50 x4v.a1a0) d = 0.09 } Capacity 1ft= 0 06 {See Figure 16 T.erigtk Req'd = 0.303 f0.06 = 5.05 ft Theref'ore: Use two {2} curb crops at 2'-9" C3 - Sta 3+02 Robie Caurt Tap of Curb Elevation = 2055.97 Gutter Elevation - 2055 47 "2[]9" Floor Elevaton = 2054 30 Law Point Flow tQ Inlet = 2 83 c.fs Capacity 1 ft = 0.37 ( See Figul`e 17 ) Length Req'd = 2.83 J a 37 = 7.65 ft T°herefore Use twa (2) curb drop at 4'-4" D1- Sta 1+30 13th AVenue - Tap o£Curb Elevation _ 2057.36 Guttea Elevation = 2055 86 "208" Floor Elevation = 2056.19 Gutter S1oge = 1.00% Area af Basin = 1. 17 acres Area ta Tnlet = 0.20 acres _ Percent Area = 17% ' Affected Q (QterW)*(Percent) q= 1 47 x 0.17 = 0.254 . 3J8 d= [(nxq) 1(O.Sbx Z x 4So) ] 318 ' d = [ { 0.014 x O.250 } 1( 056 x 50 x 40.0100} d = 0.08 Capacfty 1 ft = 0.0575 ( S@e Fig,ure 16 ) Length Roq'd = 0.250 1+d 4575 = 4.35 ft There£ore: Use two (2) cu:rb drops at 2'-3" D2 - Sta 4+22 13th AVenue Top of Curh Eleuatton _ 2054.57 Gutter EFevatron = 2454.07 "208°~ ~loor Eie►ation = 2052.90 Low Pamt FPow to Inlet ~ 1.47c.£s. Capacity 1 ft= 0.37 ~~ee Figare 17 } Lengt.h Req'd = 147 1 0.37 ° 3.97 ft `Iherefore. LTse ane {1} curb drop at 4'-0°, E1 - Sta 3+15 13th Avenue Top af Curh Elevation = 2055.52 Gutter Elevativn = 205502 "208" FPoor Elevation = 2454.35 - ~`sutter Slope = 1.00% Area of Basin = 1.17 acres Area ta Uet = 4.42 acres PBFCent APea _ 36% ~ (Qtotal)*(PerCeIlt) i} = 3.06 X 0.36 = 1.1(12 3I8 d _ [(nxq) 1 (O.Sbx Z x 450) ] 318 d _ [ Q0.014x 1 102}1(0.56x 50 x 40.0 100} d = 4.14 Capacity 1 ft= 0.09 (See Figure l6) Length Roq'd = 1. P0210.09 = 12.24 ft Therefore: Tlse tFu-ee (3) curb draps at 4'-3" E2 - Sta 4+22 13th Avenue Tap af Curb Etevatian = 2054.57 Gutter Elevation = 2054 07 "208" Floor Elevation = 2052.90 Low Pamt Area of Basin = 2.43 acres Area to Inlet = 1 55 acres Perr,ent Area = 64% AffeCCted Q (Qtotal)*{Percent} q = 3.06 x 0.64 _ 1.96 Flow to Uilet = 195 c.f.s. Capa.city !ft_ 0 37 { See Fagure 17 ) Length Req'd = 1 .96 J0.37 = 5.34 ft l'herefare. CTse tvvo (2) curh drrrps at 2'-9" E3 - Sta 2+$7 Whipple Road T'ap of Curb Elevation = 2056 73 Gutter EIevation = 2056.23 "2[}8" Floor Elevation = 205506 Low Point Axea of Basin = 2.43 acres Area ta Inlet = 4.87 acres Percent Area = 36°l0 ' Affected Q (Qtatal)*(PeTCerit) q=3(16xD.3b= 1. 10 Flow ta Wei = l. 10 c.f s. Capactty 1 ft = 0.37 {See Figuree 17 } LengCh Roq'd = 1.10 ! 4.37 = 2.47 ft ' Therefore: iJse one (1) curb rirop at 3' -4" F 1 - Sta 2+90 Wh.ipple Road Top af Curb Elevation = 2056 75 ~'rutter Elevation = 2056 25 "208" FPoor Elevation _ 2055 08 Law Fotnt Flvw to Inlet = 1.61 c.f.s. Capacity 1 ft=0 37 ( See Figure 17 } Length Req'd = 1.61 ! 0.37 = 4 35 ft Therefore: Use two (2) curb drops at 2'_3" GI - Sta 5+85 WPupple Raad Tap nf Gurb Elevation _ 2053.68 - ~''rutter Elevation = 2[]53 1$ "208" Flaor Elevation = 2052.0I Gutter Slope = 3 35% Area af Basia _ 0.57 acres Area tv InTet = Q 57 acre.s Perr,ent Area = 100°/g Affected C} {gtotal}*(Per€ent) q =083x 1.00=0.83 3P8 d = L(nxq) I (0.56x Z x 4So) ] 318 d = [ (0.014 xo.s3)i { 0.s6x 50 x 40.0335) a - oro Capacity 1 ft _0.0675 {See Figure 16 } Length Roq'd = 0.831 0.09 = 9.22 ft Therefore: Use three {3} curb dmps at 3'-3„ HIa - 5ta 5+85 'VVtugple RQad Top of Curb Elevatian = 2053.68 Gutter Eievation = 2453.18 "208" Floor Elevation a 2051.$3 Gutt.er S lope = 3 35% Area of Basin = D 68 acres Area to Tnlet = 0.25 acras Percent Area = 37°/a Affected Q (Qtvfa!)*{Perr,ent} q= 1.14 x 0.37 = 0,422 318 d = [(nxq) 1 (0.56x Z x 4Sa) ] 318 d = [ (4.014xt1422)!(056x 50 x 4470335) d=008 Capacity 1 ft= 0.4525 ( See Figtare 15 ) Length Reci'd = 4.4221 0 4525 = 8.04 ft Therefvre [7se three (3) curb drops at 2'-9" Hlb - STa 6+50 12th Avenue Top of Curh Elevation = 2053.54 GuUer Eleva-uon _ 2053.00 "208" Floor EIerration = 2051.83 Gutter Slcrpe = 1.00% AArea of Basrn = 0.68 acres Area to Tnlef = 0.43 acres Percent A,rea = 63% Affected Q ([ltotal}*(Fercent) Q=1.14x 0 63=0.72 318 d = [(uxq) 1 (0 55x Z x 4So) 1 31S d=[{ 0.0 14 x 0.72 0.56 x 54 x4q.0 1 o(? ~ d y 0. 12 Cagacity ] R = 0,07 (See Figure 16 ) - Length Req'd = 0.72 J 0.07 = 10.28 ft 7herefore. Use thrm (3) curta drops at 3,-6" J 1- Sta 3+49 12th Avenue Top of Curb Elevation = 2055.84 Gutter Elevation = 2055.34 "208" Floor Elevation = 2054.17 Gutter Slope = 1.00% Area of Basin = 1.21 acres Area to Inlet = 1.21 acres Percent Area = 100% Affected Q (Qtotal)*(Percent) q= 1.24 x 1.00 = 1.24 3/8 d = [(nxq) / (0.56x Z x 4So) ] 3/8 d = [ (0.014x124)/(0.56x 50 x 40.0100) d=0.15 Capacity / ft= 0.10 ( See Figure 16 ) Length Req'd = 1.24 / 0.10 = 12.40 ft Therefore: Use three (3) curb drops at 4'-3" DEPTH OF FLOW - y- FEET , .01 .02 .03 04 OS .06 .OB .10 . •Z .3 •4 •3 .6 .7 .8 .9 1.01 O .6 " ~ _ 4- - -T -4- a a . , o 0 ---i ' I La I .oe o I I I ~-~I-~-~I I Lid .oe I 05 ~ - ~ -i--1- - . .oa ~ - ~ ~ I _I ~ .os ~ .-+--t- .02 , - L I- , i I i I I I ~ I_I i~ ~ i ~.oi ~ . 1.0 I ~ .s (a) DISCNARGE PER FOOT OF .s LENGTH OF CURB OPENING ~---t--+--+o INLETS WHEN INTERCEPTING t~"S 100% OF GUTTER FLOW - T-~- /r I I I I I . 4 (b) PARTIAL INTERCEPTION a6 3 Q° R A T I O F O R I N L E T S O F LENGTH LESS THAN La . I ~~+.--~--~-.,2 _ ~ _ ~ i ! ~ - - - - - t- - - L - - ~t- -t - - -t - ~I Ji'~~ o I ~ ~ ~ I I I .~.10 .OS .06 .08 .10 .2 .3 4 .S .6 .8 1.0 L/La CAPACITY OF CURB OPENING INLETS ON CONTINUOUS GRAOE 6-39 FIGURE 16 o ~ . ~ e ~ ~ ym a c JaNWARY 1951 x 1 3 . HEfGHT OF OF'ENING (h) fN FEETi . c aa r H sft w a es w ~s w cn v N 1 ;a - u y w w ar o ur ~ ra r c~ ' ZA LA 6 6 m c e = ta x ~ n ~ r ~ ~ a ~ s, • ~ . ! ~ I ~ A o = ~ o 0 ~ t D ~ G r m 0 rn CARACITY PER Fn0T OF LENGTH UF flPEfVIdVG ,\i(p L) IN CF5 PER FCIOT 2 G) 0 O N A dJ m a ,r? y 9 A tl1 07 p I I I t f l t C)'-0 I li A 1 11l11 z ~ d1 ~ + = g' ; , ~ ,`~i ~ ~ ~ ~ _ 0 z c W ~ ~ a '1 c RATiQ AF DEPTM fJF WATEFt AT QPEfdING TC1 FiE GHT OF nPENlNG (H/h) kN FT./FT ~ ;u v 67l W p CM S lN Q'V ~ 17 (yN W A L1o ~ ¢ L-E- Swale No. I Road ~ Station I Top of cvxb I VViath A-1 I Perrane Road 2f61 I 2060.25 I 3@ 4'-0" A-2 I Femne Ftoad 4+32 I 2057.86 I 3@ 2:-6„ A-3 Perrine Road 5t$5 I 2056.23 3@ 2'-3„ $-l Pcrrtns R4ad I 5+85 ~ 2056.23 1 @2'_3" C-1 ~ Perrine k4ad I 2t95 2059.73 I 3@ 4,-0„ C-2 I 13tJh Avenue I 1+30 205736 I Z a 2'_9„ C-3 I Robie Court I 3+02 I 2055 97 I 2@ 4'-0" D-P I 13th AVenue 1+34 I 2057.36 2@ 2'-3" D-2 I I3th Avenue 4f22 I 2054.57 1 ?u 4'-0" E-l I 13th Avertue I 3+15 I 2055.52 I 3 @ 4'-3„ E-2 I 13th Avenue I 4+22 ~ 2054.57 I 2@ 2'_9" E-3 I Wtupple Road I 2+$7 ~ 205673 I 1@ 3'-0" F-1 ~ Whiple Road I 2+90 ~ 2056.75 ~ 2[,~a7 2'-3" Cs-1 ~ Wlupple Road I 5+85 I 205368 ~ 3@ 3'-3" H-1a I Whipple Road ~ 5+85 I 2053.68 3@ 2,-9„ *14-1b I 12th A►+enue ~ 6+60 I 2053.50 I 2@ 4'-0" t *T-1 I I2th Avenue ~ 3+40 ~ 2055.94 I 3@ 4,-0" *Tndicates Type 1 Sidevalk Tn9et 5tructum CURB DR(3P TABLE Swale No. ~ Road I Sr.ation I Top of Curb ~ Widtti A-1 ~ Perrine Road I 2+6E ~ 206025 ~ 3@ 4'-0'= A-2 ~ Perrine Road I 4+32 ~ 205786 I 3@ 2,-5„ A-3 Perr°ine Road I 5+85 ~ 205623 I 3@ 2'_3" B-t Perrsne Road 5+$5 I 2056.23 I 1@ 2'-3" c-1 Perrine Road 2+95 I 205973 3@4"-0" C-2 I 13th Avenue 1+30 I 2057.36 2 r~,r7 V-9„ C-3 I R4bie Court ~ 3+02 I 2055.97 ~ Z@ 4,-0„ I?-1 I 13th Avenue I 1+30 I 2057.36 I 2@ 2'-3" I]-2 I 13th AVenue I 4+22 I 2054.57 I 1@ 4,-0„ E-1 I 13Rh Avenue I 3+15 ~ 2055 52 I 3@ 4'-3" E-2 I 13ih Avenue I 4+22 ~ 2454 57 I 2@ 2'-9" E-3 Wluppie Road ~ 2}87 205673 i @ 3y-~~ F-1 WhiPple Road I 2+90 I 2056.75 Z@ 2,_3" G-l ~ VAupple Road ~ 5+$5 I 2053.68 ~ 3@ 3'-3" H-la IWhiPPle Road ~ 5+85 I 2053.68 I 3@ 2'-9„ *H=lb I 12th Avenue ~ 6+60 ~ 2053.50 I 2@ 4,-0„ *J-i -12r~ ~ 3+40 ~ 2055.84 - ~ 3 @ 4,-0„ *rnaicat~ Type 1 sidewalk Wet suuctm DRYWELL "TABL.E -a--- ------------~-----._.------._..e._........ ~-----------e - swal~ ~Io. Road Narn e Statian Offset Lft1Ett Type Rim Eteu. . . - - Y............. ~ t~-3 Pernne 5+8D 32' Left B 2~SS.Z3 B-1 I P'emne ~ 5+80 ~ 32' ~Rsght I A I 2055.23 C-3 13th 2+35 28' Right S 2054.97 51 . .••-~-2 _ • 28' I,eft A 2053.57 . - - E-2'.T._. 13tt~ 4f1Q Z$' Right H 2053.57 E-3 ~ vAupple ~ 3-1-00 ~ 2$' ~ Left A ~ 205573 F-I Wtupple 2+80 28' Right A 2055.75 _ 1 ~hipple 5+9(] 30' Right A 2050. . I , H-1 Whipple 5+90 30' I,eft A 2052.50 y-1 ~ 12th ~ 3+30 I 32' ~ Right I B I 2054.94 . NOVeIiIbBC 17, 1997 Randy H&hil, P.E. Hahn Engineering 8623 North T7ivisian, Suite B Spokane, Washingt[an 99208 Re: Review Commenta 3 far Valley Pines, PE-1737 Randy, The Craunty Engineers haVe reviewed the road and drainage plards far this piat. The follaw'rng items rnust be addressed prior to acceptance afthe plans. Sheet 1 l. Tvyo swales are labeled as Swale A-1. Please clarify. 2. This sheet mustbe stamped by a Professivnal Engineer, licensed in the State of Washin,gtan. 5heet 2 r. Illustrate the centerline stationing an each rraad. 2. A,ddress where the runoff goes Qn lP Arrenue, firom Sta l 0+96.8G westward, ar►d from ths east curh an Wlzigple eastward. 3. The taper vn the west end of 12'h Avenue extends outside oFthe RIW. Please correct this, 4. I]etail the transitian from the Type A curb an 12'h Auenue to the Type R curb vn the interior rvads. 5. Nvte Sta. 10+00 and Sta. 19+19. r2 as the "End" of each taper. b. Address why Type A curh is being used instead vf"Type B. 7. Specify the c1ass of asphalt and the type of crushed rock tv be used. Iteference the WSDDT specifieations. 8. Regarding En,gineer' s Note 3(flabeled as 2): It appears that there 1s suf~'icient RIW vvidth for the sidewalk. Why is the 1' easernent needed on i 2'h Avenue? 9. A Design Deviation is required for curb grades less than 0.8°l0. 10. Vertical curvea are required fvr changes in grade greater than 100°I'o. There are tw4 grade breaks on tt3is sheet where verticai cuYVes at-e needed. 5hcet 3 1. As on Sheet 2, the taper on the west end of 12th Avenue extends outside of the RiW. 1 prvvide station equations far each intersection. 3. Note the stativn of the centerpoint of the cul-de-sae in the plan view. 4. Yvu may wan# to take a look at the two vertical curves that begin at 1+75 and 3+0(]. Tt dQes not appear that these two curves are needed. 5. Specify the class of asphalt and the type of crushed rock to be used. Reference the W SDQT specifications. 6. °I'he Conciitions vfApproval reqtrire 3dr of iAS]]h$it OI'1 fihe 1ntetlDI' ToAdS. Plea5e GaffBCf th15. 7. In the profile, detail the lacation, elevatian, and affset of each curb inlet. Sheet 4 1 . Frorn the curb return eievations giVen for the nartheast comer of Petrine and 13"° A,venue, it appears that that the water wi11 puddle at the middle afthe retum. P1ease take a laok at tlus, and correct if necessary. 2 Place stationing on the centerlines of the rvads. 1 The two curb retum elevativns shawwn as 2056.00 4n Robie Caurt, are shown as 2035.97 on 5heet S. Which eievatian is correct? 4 The street inxersection eguation given far Whipple RQad is incorrect. The statian fvr 13'h Avenue shauld be 5+56.60. 5. The landing for 13`h AVenue anta Wupple Rvad is tvo steeg. The rnaximum grade for the ]anding area 'rs 2.00°fa. f. Specify the class of asphalt and the type of crushed rock to be used. Reference the WSDGT specifications. 7. The Cvnditivns of Apgrova.l require 36' of asphalt on the interiar rvads. Please correct this, 8 In the profile, detail the location, elevation, and offset of each curb inlet. 5heet 5 1. Pl,ace stataaning an the centerlines vfthe roads. 2. Note the curb retum elevations for each side of the intersectian. 3. Prvvide the station equation far the intersection. ~ 4. The curb retum elevativns showwn as 2455.97 in the prafile on this sheet are shvwn as 2056 OD vn the preVivus sheet. Please clarify. 5, In the profide, deta the location, ele►+ation, and offset of each curb inlet, 6. 5pe.cify the class of asghait and the type of crushed rock to be used. Reference the WSDt3T specificatioras. . ~ 7. The Conditions of Approval require 36' 4f asphalt vn the interiQr roads Please carrect this. 5heet 6 1. Ptace stationing on the centeriines of the roads. 2. Fravide statian equatians fnr each intersection. 3. Nnte the curb retum elevativns far each intersect1an. 4. Label each curve w'sth its appropriate desi„gna#ian (R I, R2, etc.). 5. Prorride curve data far curves FG azd AB at the cul-de-sac. 6, Shaw the centerpvint and radius for the Gulpde-sac. 7. Check the centertine eievatians fvr 1Nhipple Raad. The elevatIans do not campute carrectly with the given grades. 8. Check the elevativn for the tvp right of curb at StaCion 5+00 -sametting isn°t quite right here. 9. The profile far thc cul-de-sac, on the right hand side of the sheet, is mistalcenly laheled centerline. 10. Check the elevatians for Point B and Point F on the cul-de-sac. 11. 5pecify the class aF asphalt and the type of crushed rvck tv be used ;Reference the WSDC3T specifications. 12. The Cvnditions of Apprvval require 36' of asphalt ❑n the interior rvads. ;Please carrect this. 13. The minirnum allowable vertical curve Pength is 100'. Piease carrect the curves that do not adhere to this requirement. 1 Sheet 7 1. Review the bvttam of swale and drywell rim elevaticrns. It appe.ars that the grate is 1.5" abave the bottvm of the swale. Flease correct this. 2. Far a!l swales, relvcate the dryvvells a sufficient distance away from the curb draps. This will prevent shart-circuiting vfthe swales. 3. Are the givan bottom of swale elevations ,given as final gcade or rvugh grade7 P1ea5e clarify. 4. For Swale H- 1, cheek the statian giuen fvr the curb drop an 'VVhippls. lnstead of 5+50 it seems that 3t shauld be 5+85. 5. Forr Swale E-3, the stativn fvr the curh drvp vn Whipple shauld be 2+86.82 instead of 2+90. Sheet S 1. The swale crvss-sections refer tv "SHT 6 OF 7." Please clarify ar mvdify. ~ . Drainage Renort The time vf concentratian Iengths for reaches 14 thrvugh 18 do nat appear to be accurate. Also, the slope for reach 16 dves not seern to reflect the road grade. Flease review these, and r,,.orrect the Bowstmng and swale calculatians as necessary. 2. Check the areas af Basins B, H, and J. I cauld nat duplicate the areas that you shaw an ths calculations. Finally, the plans vvvuld be clearer and easier to read if the layers for the utiYities were tumed off, un2ess there is a cvrnpelling reason to shovv the utilities crn the road and drainage plans. All af the foregoing corrnments must he addressed with xhe next subrnittal. Pieme return the enclased red-Iined plans with th€ next submittal. Feel free to call if yau hawe any questivns regarding these commerats. Sincerely, Spukane County Engineers i]vug Busko, E.I.T. Plans Review Engineer encl. Submittal 3, rad-lined G. Williarn Koll, K&B Tnvestment Ca. PE,1737 Project Fi1e / DRAINAGE 1REPO.LR 1 FOR VALLEa ~INEAf SUBDI1 ISIO1 1 POR7 OF SE 1f4' SEV• 21 T2SN, R44E. W.M. SPOKANE, WASHINGTON Prepared For: Laltay 8uilders, L.L.C. , 128 10 E Nvra, St C Spvkane, WA 99 1 . ~ . G. ~ ~ ~ras 0 2saa~ t~l ,ry'~v NAL, , r Prepared By; Hahn Engisneering, Tric N 8523 Divisiorc St Ste# B Spvkane,WA 99208 vpsub-doc PROJECT I)ESiCRtMClN The praject knvwn as "Vafley Pines Subdirrisivn" is generally lacated Sauih and adjacent to Twelfth AVe, approximatley 500 feet ta the West of Pines road in the SE 1J4 quarter of section 21, T25N, R44E, W.M., Spakane Cnunty, Washington, Valley Fines is situate.d on apprvximately 115 arces which wi1T be subdivided intv 37 Ivts far single family dwellings. The soiIs in the area af this project are Springdale graVelly sandy loanns ( S* B). The Springdale soils are pre- approved inSpok~e 6ounty fvr the use of dcyvvells. PW..MMMM - vMuhdoc erae t=;-'•' l.... . ~ ~~I ° ' ~ ~L,; Y4~~s ~ ~ 3 ~ ~ ~ ~ ]l 2W1 f ! ~~r`•........ fI4~ ' f _ ~ 0~ . t ' ~„k`• ~ ~ ~ ~ ~ yf,.. i pys . _~dd6~ - q j , ___'=_~U r ~Off4w \w q ~ Pit - ' f N~ A 7+! [Y M R ~ s . - - ~ ' ` E ~ ' - Z oo ° sss we~c ~ • ~ ~ ~ ' ~ I~' ~ -'~~s`~~~ . 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Q~~ . ` ' ~e,y N y ~ • 2 ! ~ ~a~Y~ ~ sF' '.s~'~ ~ ~ i4' ~ '~i` 4 ~1~~'~~~ 4 s ° . ~ ~ ♦ ~ ~ a~ •-j?;1~y« ~ ~ a• l : ~ ~ 'r; t + ' { ' C~" 1 ~ ~ `1 r ~ ~ y~ ~ • 1.~~~i;'Wl s~ S!. \ '~~.t1'7~ t.~ `T ~K~t~ ',11•~~yl{~~~~' ~`v.~~y~VT' rw,!~~~>>' ti~ li J t ~~~4~~} y ; ~ ~ • ,t~i '•i .,11-. ~ ~ ~ , t. + ~ c ' ~ ; ' ~ i` q .~.~1 ~ + ~ M.~•. ` • ~^t~ - . • it~~"~ r•....rt ~ • ~ t ~.t. ` O ~ ~ - ~ .Il, y•~ ti, ~ ` ` ~i •1 ',.4•.'x~'°i~' ,u'' • '~ry;~;~U V+''~•• ~ E`~~ ~ ~ . ~ ~l ~ ` i _~t:' • •lj j ~•'r '~~t ~ t~~l~~ ~ r`~ ,t, , 't'Y, R•a.ts TNCP7NG$ ~ ~~•J_ IC. ~t~r~ ~ ti ~ ~~i t~~ ra ~ ~~(TEpY ~ ~ ~ ryl~t . ~ : .tjrv • , • i.r ~.s o •a ~ ~ ~ l~y~ + ~ ~ H' t~~11'~~~~~ ' ~CB~ .'~~i!~ . ~ ~ 'i. ~ 1 , ~ _ "~f4~; ~ ,r' ~ , . ~ Z ' . • ~ ~ ' ~!1 ~ ^ ♦ F S ~ ~y,.~ k.~. 7j#j I1~i' ~i;il;.~~ i':~~~~i'rr{y;ti; '~~i..~•~ ;qj~ `v^ ~ • ~ i4 ~ ~ ! + ::KO ♦ i i :i.~.e'! . - ~i ~ 1~ _ ) ~ ~ ~Q~j~: ~ t ~ _a~ ' t t Z~C`R~ r' ~ • 1 ~ ~ l~ K~~ ~ ~5 +l_til~i. ~ , ~ +}x!', • , Q ' t,•, ~ ! •1 C: ~ . ~ H. T . . f ~ . : , .r,~~7~.~ ..*l! ! ~ Y ._4~ K~ ~F:Z~f. .x` ` ~ ~2 ~ Ori•r~ ♦ ~ , ; ~ ~ ~ ~ 4, ~p{;~,~ , vst ~ ~ -~~```Y t ;:'~i'f;y Y},~,yi:'-; : • ( .i 1 ~ ~t ' ~ , i • ~ S , j ,1 ~ i 1: • 1~ . ` • ;AyYa,k ~Y • 2 ~ i . ` j ~ ~ J~. (c!, ,j~~ M1µ ` ~ ` i , ~ r~ •~',}"U~ ~ . ~ . ~rNtii4~'ki' ' a W . . . . ~ ~i' ~ '1 '~,~1• J,' . ; i r R: t~ ` . ~O • !P~' ~ • • Y ' .t•.: j : ~ chool , zF 9~ ` ~ :iA~ . ~ . , y~ - . 5 . ~ ~ $ ~ i ~t ~ • ♦ - ZQ • ; i • , ~ ^ th~~. I~Y e~M,, ~ ~1;~ ' : • Q •d .}y~ .A•~.i~ . 't ~ . ~,a. '1 ~ ~ - : f~N ~ ~M1~~ S' . +K 'C - • ; ~,i9~~~~, .,!i ~ x~ti::a~~~;i~=,~.~ } . , • ^~~S „'J ~ ' ~ } y1~!~Y ~'4'~' ' ' • 3~j 3'. 74~~t'•`'~"~ :i 1 ' ii• , "P' ~ ~ .~~.4 , ~ ' 'i'~ Ci, ,~t{'c~,l~+,,, 'e. . . ` f ~ ~ ~~,i ...,A~ :,r rt~ a . ° 'a~` • , r•' , . . 1~~ . ~r , . ~,..4 . ~ t~ ~r` ~ + t' ~f `,;.,~;7 • : ~ ` . 'i tu►., ~ ~S ~ SL; Y ~ y~X ~ • "^.i4 ` r'c'~n p~` 1 '~,~j•.• ~ - hA ~ A i c ~"1 ~ • 1~ ~ t A~ar~ , ~ • : • t< H ~ u: ~ri Y~i ~T''Y' ~1 ' ~M , • 1..1i ,rl'~^ ~S~ ;LLy a : .i c;s ~ . ' ~ t t ' r ~ 'u~,, ' - ;i;' sti'~^;,~~ f: i ~t , ~1 J~ ~ ~ ~ , ~1 • _~e~ l • . . , i, ` t ~l,~ . .5~-- • . ;•p:t~iA _ .,r •i, i . ~ I , ~ ~t , 4,~ h~j ir~••.•+' .rr..(~(T~B~~t•'~It, ' ~ 4~•~ 1 ~ ~ ~ ~ , ~ r~ 4~ 1R-~'~♦ 4 , ~ ~ ~R ~ F J~- ~ • • ' ~f ~:~ai:.'~,;~,~t ~.L~ , ..y• ' ' art' ` '1,~ « ~ ~ ' ryt ' ~,Y,~ ` ,.~.t?', `t•.:t:.: i,• SXB ' ' ~ • • I • , a`.'' e~~• • t ~~r~W {'+~'r'~ `~t' , r T`=, ~F ~t.;.. . ,i' • ' ~,~'(~j~.i'n4'i, 'L"~~;~iYb-1.ti. i;~!};. Y 1~ hit . ~ ~i ~ fw + ' , ' :it,~' i~S: ~i'~•r .s": .,s~' . ~ ~•.T ~ . F .t" ' ~ • ,e , ,f H'.e,~ ~f~ t` L '7 :~ti: . ; . • ~ ,i w' •~~*~'~i,, N i ~~•r• A'11~~~:.~~'~, " . . ~i .{,r.• . ' f ~ y~~ ~.y ~ T,~i• ~..s~'W ~ ' ` • ~ ' ~ - , ' $x8 `'4 spu, ~Vt 4~, j`~ '~~:t:;`.• 4.n•~ .1 '.i ~ ty~. ~F'' i;.,. ~ S - ` . . y ' 'jhg;1N~;'~ , . 1~ ~ , . ' , ' ~t t ' , t L 1~; ~ ~r ~ . ~C: . • f• . . $DCL{' ''IS+'~• i~ S t.~ ~ `•~ti ~.r„U~ + l hester,: ~ ' 1 ~ ; ' ' ' •'~.~M ~pi'w~.~.a. ~ 34 I •,ti: h,~ ~;'t ~ i ~ ~'K 1: • ~ ~ ~Y ~c, y r'~~.'*`,~.~i . • . 7 ~ ~ a ' i~ « n+• ~ l~{y~~~y ~ h ~,►~~~ti~ ~ ~ ~ i, t i X ' ~ '•'H l $ ;~r~ ;t;~ ~~y A',f~. . ~ •tc t L , h .~L+• , ; c , ~ .J.r .\~b P~ ~T Bb$~ •~i ntili~5,'• . t{;~. :r n{t r' . ~ ~ s•t yy d • ~ ('y, ati ~ • ~ : Y i'~ ~ : i5' ~ 'y{'~ , • i~l ~i~~ ~ ` ' 4 ~ } -A • ~ ;'~y~f> :...y... ~ ~j ~ X:t ~ •~i ct. ~ y~~~ .s. .ti~i .i ~,l , ~ t ~ ` j ~ ~l; .w~. t G ~ ~ FS r ~ . . •~.1~~~y,~ ~a~ , ~`sA f ►4. 4 :iy ~i~,J~+: + ~ + . T tit. . ~ ty . ~ . v~s:,{ • ' :.;r `L, . --~c. • , . - 't - ~ SDIL SLi1RYEY it VIe---2; ivoacll-iiicl group 7; not in a ran~e site. Spo- terr:~ces ~ezid glaci:~l tiaacl plauis iz~r CQi~rt a~id Chtit- kana laam--c~.pa1~ilit~- tiziit ~raodlancl ~roii~ G; nat taro~* ui tiie eez~trai part of S~ok;ane Couiitr. llast sl~apes ~ -a tange site} 5kow:+~ ft k.a~r•e_ c- are letireeai ? atid 1~} ~~ercent; fen~ 2i•e steeper. Pepre- Spokane cample_r-, 30 to 70 percent sIdpes {5sE!.-F ot sentstire pL=ofi9e: to i(] percent af tlais cnmglcs is mvder;itelr =ti.tllow 0 to 2 inche,. rery r1ark- brayfsh-brUwn, Ferr 'r,ab1e ,rave11p §p[5ka1i2 loatn; froiat 15 to ?3 percellt is SpO1.a2ie Ioxm that caarse :ansir loam; ,,,~°I'ffIIli1aP SCPIICLAPL•, IICllL:1d; ITri[I15CLlIbed 5a SZ0p8 ran~B of 30 t~7 +~6 perCC11~.; t~le re5t cOr sist.5 of areas hare an oraanfC mat 1 inCh tbick on t!:z surface. DscoIV ss~ils aikd ❑'t11ei• Spok:ine scails. Tiie rnc.:eratel}' 2 to 12 luchgs, t3ark-hr4nEn, friable b avel1y cna::a sandy lvana , sl€ghtlr acid, ~ediuzn ucir~ Uelnts a ~lepth nP 13 ;uches. aLip~T ~i~?O~i111~ Ip,ti1n ~~:15 a Sur~~CB lat=~r ~~3r ~ iJ1C~a25 12 ta 24 facLies, darh yellowish-brvirn grarelT,r loamy cvarse thuiner than that af Spokane roam, 0 to 30 Percer_r .;---lapes, sana; sligk►ckS acid. d is ?fl ta 30 inches dea to ~reelrack. Surf;~ce ~uiot~ is 24 inches grarelap cvarse sand pic~ rar very ra~aicl, ;~i~~ the 1iazard a# erosion ~s very The ealor ot the surface Iaj ei is z°erz• dnrlc ~visii l~i•o~vn rerp. to ~rery cl~.rk 1~rawn. '~~~e su~oi] ranges fromdark brown This coniplex is ttsecl rts ►rvodland and for lirnir~1 crraz- tp dark ~e~]orrish braR-a~ in co1or aszel f~:s~i~t g: avell~' satzdy g. (~Ls ;t com~ale_~ : c:~pauilitF unit ~`+XIe-J.. BT c~am- laa~n tr~ grarellv 1oamJ- coarse satYC1 iix tesiLize. Gravel3y inents: Spoltaaie 1aan1. moelerateTy s1ia11ow-eqnability eonr:e saaad is nt a depth of 20 to 30 inches. Ta soine a rea5 _iit VIIe--1; n oadlancl',group i_ aiat in a ran~e sate. cvuulestoaies flcc~ir tkirougl~o~~G tlie prafiie. ~ ra~ucli :~s l4 Spokane la:xm-ctipabilit►= unit ~~Te-`~; iraodFnn~; ~rou~ psrcent of saiiae ag•cas couslsts of other S~ric~c~ale ~oils; ~ - - ixot in a, r:~nge site} ~~•tid- acsYp ~.o~'~ perceait af T3oriner mraFelly silt Iaan~; and apercezat of SPo1ri.az~e very a-~acky cainplex, 0 to 30 ~ercent sl0pes C1artaii: indr 1oaan. ,_tC).-Froru 50 to $0 perceiit of fYsis map}3ing unit is T'liis sail 'i; soF3iess-li;at excessirelv rlra~ined :uid has niaderateljT shallow Spakane 1oain; the rest conz-ists of moderatelr rapid periueabilit~. It 1ao1~Is le=- zhan 5 iiicl3es •anita rock OLltCrA~JS R11C1 0f J~IOiCO~V soils oi odmer Spa- af ~;s-atez that pla~i~ can use Zi is low in sertility. In 4ne soils. These soils analze up 15 percekit af son_e areas. Oleneial. it is easy to work. :Roots of mast palanzs penetz•ate ,_~.s a eoni ple~: c:~pability nnit VIIS-~. Ft' CCII11~)C?- o11l~" a ~B[T 11~C~1E5 lilC9 $218 ~raz•elly conrse s&ncl. S~irf1ce ne3~ts: S~aflka r~e iaaixs, moc~feratelp s1~a11o~r~apa~azlity rui1Qff is slow. nn~l tl~e ~iaz~.rct of eiosion is =ias~it. lit ~~xe-°~; .~-~oc~l~i~~1 ~ ;ou ~ i ; nat 1n i=~z~;e siLe. Pack 1~ost of the qcre;~ae is ~~secl ;~s ~rood'_a~.a nx~cl for Ltcaops---capzbilitv ui~~~ rMs-1: nat in a woocllwicl ~r~,zulz. Yields of foraze are 1o~r. Less zL~ ltl percer~t ~_•vup flr range site) ~~I~ is ctilcirated, nntl aza11• a few sinalI areas are irrigated. Spokane vezy roc'ky cex, 30 to 70 percent albpes The Graps nown are z1f21fa and grass for ]aar or pasture. rEi.-Fr4m 50 to 80 percent of this rnapping iuiit is yyI1eac ar rre is (ri-orn dttriiacr reestablislunen't of alfalfa ocleratel~ s~iallo~r S~~al.;~ne loaru. The rest ca:ists of ;vnd orasu. Le~lines respgn~l ta sulfiir ~i~d ~anietimes to b: anite rne1~ a~.itcro~aG. boran. ( C ip:tbility unit VIe-2jwnaclland zroup 1 i; not ; The acrenge is used for tinibez• ;ind for ~rnx~g. T~ae ina ringa sire) • ;e of tractoia for log;ing is IiZnited. (As acemples: SprirgdaTe gt`avelty loamp sand, 30 ta 70 gercent .paUilitv tinit YiIs-?7 ffy ecrinpaneiits: Spolrane snil sloPes {SzE1.-Tliis soil is rneaclerateTy extensire an terrace -~~pahility Linit VIle-1: wovdlanel ffro1iP 1:noc 111 n brenks nncl coilurill slvpes alonyg ~ m:~aar drr:linaae►r2ys aii r:~nga site. l~ocl:, auterops-capabiTity ~€izii't noc t~tQ Ce11CP11 ~7.11`C f}f tJ7E Cf7LlTZti'. .kiei]Z'eSelltfll:7°$ ~li[]Flle: tL l}-OOffli1I1d jl'OLlp Ol` Ya11ge Slfe) i3~..~4,iVaF"' a,~.par1.~►~ Spvi:ane e~tx•emely z•oci~y cnm~7e~, ~0 ~o r4 ~aercent~""P~iS to 11 anches. darl-bro~ e arelly Iotemr sancl :neutral, b au- ular srrucause and sLi~htls darlcer caloa in np~r 3 iaehes. .~.OpeS (SvE).-~'rom t0 50 ~]erC~ET4t i~f ti3~1S m~1pP~ unit 11 to 1 ~ iacbe~. bsosrn gPAFQIIy lonmp saiad ;fecc dark-broran is a, maderately shallow Spakane laam tliat has~ a slope ana red(li:h-browu mvtcles; ueutrai. .nge afr 30 to 70 perceiit. The rest coxisisfy of rock oLZt- 17 to 60 incnes brown rery braveti9 course sana; neutrui. ops. Tlie acxeage is useel fvr timber arid for grnzizs;. The testura af the suiface 1ayer i:tn;es 'Irom gaavelIy ~_s cotnplex : c.p:~bili~ unit ~Is-?. Br caznpo- loamr sar~~i to ~raE-ellv ar col~l~lv sanrl. TLe ;;rai•el con- i7anis : Spo1~2ne soil-~capabilitr t~it VIIe-1; wooc~lland tei~t of t~ie _u}_-oi1 n, nies from 40 ta 90 pei•cerLc. As mucli •oup i; aiot in z z•ange site. Rnck outeropa-c1pability as 10 pei-ceirz nf soine areas consists of Marble iaainv caarse iit VIIIs-1; nat in a woocilnnd goup or rz~i,re Siie) stincl, 0 tv 30 percent slapes, and of aEher Sprina~l~le svils. ~ ~'l~is soil i= sv;nerrliit exces::ir elv drainetl :tncl has anvd- p1i11tgdalE SeYieS erately rapid peruzeability. It lifllzls less than 5 anches of zrtiter that p1aws ean use. T]ie fea•tilaLy is low. Raat pene- 7`he Spriaigclale series cansists of samerrhtii exceSsivelv tiatioii is deep. Tlie ttse of iiiaclzuieny Ls t1ifficu1t. Surfacg urairied , conrse teaturerl antt rnodera.tely co:cm rextured, ruuloff zs -zIotr to n-ieditiin; and tlae h2aarrl of erasion is rrravell;y 2iid eobhly soils. TIzese soils formetl ui glacial sli;ht to msxlerate. it`vash niixecl witli sonae roIcnniG as1ii under ponderos;e Th4s sail i: uced as a, sotiirca Qf f-rmreT for concrete. There .na and ~ ass. Tliey are nearIy level ta very ssc~zp soiTs is saine - azur& on tl~e 1e~ s3aping areas. bt~t yielc~s af Uri outiv~~i terri,ces :it1d 8.0od j]l:L1iL5, The Z111111al 17L'e- fOl'aa8 are iaw. {Ctipnbility iinit VU~-1; woadIand r.ipit€~tion is la ta 18 inches, nnd t,}~e fr~sst-free se:~son zs ~ oup 19; nac in ran~~ si~e} aaut 110 d2ys. Springdale gravellF sandy loam, deep, Q ta 20 percent Sails of tlxe Springdale series are iised for nlfalfs. gr1ss, SlOpG'$ (Sx$}.-TI'i1S SO1L ha„S a 831rface Iayer 1 or 2 inches anr1 ~ airi. They axe a~o user~ f+~r ~z•azir~g :~nr~ s~.s thir-er than chat of Spsingelala ~i-elly sandp loam, 0 to ~oo~lia~nd. 20 percent slopes, and tlie depth to b svel and cohblestoness Springdale graveIly sandy 1Qam, 0 to 20 percent is ara.ore than :6 inclies, This soi3 1iolels 5c0 7 inches af lopes (SwB).-T3iis is tlae dominant sail on tlie outwash water that plants cnn use. _ls lnuclt as 10 percent of same s` ~ ,t._. . . ~ _ . . _ I sPaKA_'Z_z. co`fiY, WAsH1:cGT0s 37 ---ea,s Colisists Of fltlier Spriu~►daIe =oi1s, ancl ,is i3:-ach a.s S Tekoa gt•avelly silt loam, 20 ta 30 percent sloges percent catisist,s of 13o»ier:tiid Clayton solls. (TeCl.-Tliis Pravelly soil la;rs medium to :-apici surface This soil is usecl fvr the s1nae craps as Cpri.ragdale rtitzotf and a mncieraLe to cerere Iiazard uf emsivii. About ave11y sazzely lo,tm. 6 fa ?d percent sTopes, but nroduces ~~~erceixt af sorne tireas coiisists vf Berazh~:i and Schu- ---~lier vields. (C~~p.zlailat~- tuiit I~~ e--5; iroacllar,',a ~*ro~i~~ anlc~~er snils. 1.~ : siot iaI rnr~ge ~ire} T1I~S sarl i~ ~Fve~l L~~-iiiiari1y fo~• tiniber ~,r0d-- 4tia~~. 5m:~1z 5prinadaTe cobbIy sandy loam, 0 $(1 20 p@TCEIIt 5lopF:5 are:is ara seecled io sinaTl graiiY ar to o°rass anc:t 1eg-umes fflr ,B).-`l'his soil cantiizis gravel an(t colablestanrs at a liav or pu4ture. {C1palaixity uiiit Nrc-Aland aroup __pth ot 24 t0 36 izaclges. A5 maiclr as 10 percenz ot soine i ; iiot in :L i•inae site} -treas coiisists of otlier S~Si•isi~c~.ale soi1=. Tekaa ~;ez~~ ~rocky ccrmples, 9-5 trs ~a p~rGent Iupes ~1iis soil is use~~ :~s R-avtlland and for grtizzncy. i;Cap%- (Tk[3).-Frain 20 to 50 pet•cent of this in~pp1ig umt con- ity tuiit VTIs-1; wooclland group 17; nQt iri a range sista Qf sancl.rone outcrops; tlie rest is a T-~koa bravelly ,...81 sLlt lQam tlaac 3i.-Ls a, slope i•ange of 30 ta 33 -percent. Tlie zcrelze is iiserl for graxinz. {As a camples: capabality ,koa Serie5 U21it r. ZZs-?. Bv, camponei~ts : Tekon soil---=apabi.lit u.nxt VZ~?: Nr~sacdlir~~~ ~raup i ; ii4t i11 xaz7~e SI:e. Rac~ oui- y, craL~s capalatlit~ tuiiG ~L`IIIs-1; npt in ~u `rc•_rffland 97oitp Die Tel-oa series consists af irell-drlineel. -ti•ell ii~ecli~iax~-texiiire(l sails. Tliese voils forn~ecl uncl~e~• conifers or range sxte) tl ~ricses ~a ~reatlie~•e~1 santlstone, qu:~z-tzite, sch-t, ~id ile. Thev ❑ecupy zenrly Sloi3in~ ta `-er~• stee~~ ?~art~l LThlra se~'1e5 .._auntainaus areas. ~Tlie :~Z~aiual p~•ecigitlttot~. i5 ;oQ~it ?2 ixiehes, anzl tiie frosr-fz•ee seaion is ab~ur, 120 claya. Tlie soil; of t17e ~~ilic, series are dark- calored, well Tel.aa soils ax•e use(l fvz• gazing, as rc-oodZanci. :tncl as cIrailied, aiid mediunz texturecL Tlier are Tezir cleep far lcllife lxzbata'ts. =L faNr siu;ePl areas tre ticeel fvT c-Taiii; the m»st 1)arr, btii betlrocl- is at a depcli of to -10 anches iss, <x~i~~ ie~ux~es. in soane plnces. '.Cl~e;.e soils farrnecl iui~ler ~aEs in glacial ~ Tekoa gravelly siTt I4am, 30 tn 53 pex•eent alrspes till mised in the upper part n-itli 1oess asci ,-olcnnac uh. D1 -This soil occurs on Teboa ]Iourr.tain and -zimilar Tlier accurze7itly s1o~3i~7~ #o a~~a~~er;~telc s.eep uplaiicls. oinoixtaries 121 tlie ca~int~-, llast slope; :~x-e be:~een 30 TIie~iuii~a~~,az•ecipitatiaii zsX5ta ?liiiches. Tlie frost-free -..d. 45 perceut. Reprewenratire profile: seasoal zs Rboizc 140 d:r.s-s. 0 to 14 tz~ches, aark-hFOwa. frzaeFe gra=euy stit io;~m. ~nnnlar LTllrz soils 1~•e tiseci~foa zrnin, peas; lezitils. gra_s; alfalfn, iu the upper 5 inches,iieueral, grading io slibhClr ac;d below 1-ezerables. lntl 0rC1inrd f'rtlits. r s aepth of 5 lncires, undf5turbeti ureas hare au n,Wmic mflt TThlig silt laam, 5 to 20 percent sIapes ~3},-T1zis is I iiieli thiczc on the surtuce, the doz;iiiiant :oil an 1'eoiie. Qrchaz d. aiid P:easant Prai.- 14 ro 20 inehes, aark-brvwn, fraubIe grarelfy lienrr ---Ic ioam that breatis IntD prisnzs 1 ta 2 incE~~s wisle and z2ien inta ries ui the cenri•al aTt Qf t128 COlillty' n"11ICl1 recezves 18 tn angnlar hiocl-s lj to 1/1 rnch wiag; medilam actd. 21 inehes of iaa3rfn 1azanually. It alsa vccurSon the;la.cial 20 ro 35 inclies, yelFatir3sh-brottin rery grareliy loamF massire autwazPi pl;ei3i in the western npicl sanrhwe_tei-n ~urFs af or $netr la~nnaterl; ~nea:um neae~. tlie cotiia~t~•, tirlizciz zeceiti-e 15 tr~ 15 inches af r:infnl~. lrost 3s iuches fractured sRIIa5C0II0. slOpEj are becrreen G azail 10 Xaercent: ;t fe'~- are steeper. riie color of flbe surfaee larsx is bz•owii or dariL arawn_ Representaeive profile : Le textuz•9 of the subsoiP 1s grave11r lon1T7 or z?'arelly o to 4 inches, hlack, rery friabie silt 1oam; grat;lar strncture; ..._t loain. Frzcturecl la:srent rock acciirs at a cleprh of 24 mecl'aum scld. to 40 iuches. As much :is 5 percent of same areas cansists 4 to xs kIIches, verr darb gray, very friahle sL= laam anore a BEl`IlliEli a]'1[I CaG1au111aC11er svlls. c3epth ot 10 inehes; Uie:eks iaita pPares ?I(; tu fneh thfck; T3iis sail is we1l clrained rsncl maclei•atelr perinezble. It ^liglitlr q6rl; rex•F clarL broirn, rea-r frlable ~:lt ]nntu below :l cle«th o$ lfl inChCS ; ueutral. ZdS 5 tfl r inclies of zrater that p1ants can ZTSe. The fer- i• co 421 inehri, tiark-urown. flrsn lo2ui, friable L*!on- a depth ot t111ty I3 10w. RoC1t5 pQtl@t11Ze tf] the 3lridvtoRe. 'SiIPfRCe iuclies: bre:3hs fazto sula:sugtilnr Lllnck; ~o 1 iueh wicie y «off is ra l, and tiie 1iazard af ero:ion is seZ-eIE. I1efICP1l- \roiae af soil is eultirate[l. Xt is i3sefl fCrr timoer, far 42 rri 60 iziehe:, Ueown, rerr fri:zl,le rein• Suc s.►uds Taam ; . 1zi2ig; :kzicl l~~r 1~-ilcl'life. jC`npal~ilirr ui~iG VYe-?: ~-uod- neutral. ri~tzd gTQLil7'i ;iiOG ]ll 2 P'allrre -ite) TI~e co1nr nf rlie stTrfzce 1ayer xnnze: from ~a1ac1~ tn vei•y Pekaa graveTly silt ~Zoam, 5 t4 20 percent slapes dark brawn. The texture vf the su'brqil rzn-zes from silt BJ,-Tlia surf2ee larer of klus soi] is a littie thickzr tlia,iz loasn to s-eri- fine sancly loain. Lime occiirs ir- nlaces'beTora ,,uat ~f Tekoa ~=a•~.~ell~- si1t laaan, 30 to aa percenr slopes. a Glepeli af 3G inclies. In some arens a; rrcucli 7= la pexcent Surfnce riaioff is znedtlm, and tlie et•flsinn hazard is moel- of the sub-zflil calisists nf coaiie granite aa7d baszlt sand, ite. 5uz•face g-rai-e1 hintlers cultiratian in srme plaees. gr-.ve1, aiitl afezs` cabblestones. Tn pl1ces n ryraFelly and , much as 3 perceait of some areas v6nsists of Bernliill sandy layer is pze=eiit ne ti depth of 36 to -1= inches. As aild Scit3umaeher soils. much 1s 10 percent af same :LY`eRS CQISSI5ts of Beimhi]l, This soil is used niainlr for iimber 3ne1 gr$zing. A fe-w Clreney, Snow; azid H€sseltine soils. a1T nreas are used fcsr small grnui 3nil aIfalfa, ar are ThBS soil is ccell drained and snoderately Zerineabla. ~t ded ta g-rass and leg-urnes for pasture ar hay. Yields ho1ds + t❑ II inches of trater that plants can iise. Tlie are fair. Grain cLnd gras; crops respoaid to 3iirrogen; ferxzlzbv• is liigh. Root penetrztzan is rery deep. There is unies respon(l to sulfiir and pliosg#zorus. (C:xpRbiiity no diffici;lty in rlie use of farm m;tclainery. Crlrface runaff it IV e-4; woadland -roup 7,; iaot in z a•an ge site) is mecdiuiai. nncl rlae hazare1 flf erosiozi as moderare. 6 102 ' soIL sURvEF TaBr.E i.-Intea•pi•etatio?a oj ertgaaieerinu Suiiabiliti c:.s aource bf- Svil ieastiires sffer-.mg- 5oi1 series ar type, F.l1Ii3 liaiidz Rnd tsiap s}-iuhois ~ , . ~TapEaLl Sand i Grai•eF ' Road fIi H i ghwa}•la c:sxion Dikcs or levees an• src:i I Spe9gle (SoE)-----I F.i:r_---- 'Nvt aiai[- rnt 5litt- T.iir----- Sll& h}, TO }li$}1 suscep- .lloclerate _lPodEratt- [icr- ~ ahle abIe. tibLlit~~ ta frast isr; xnipe-~:oiis me~i~3iilte•, ~ actiou; Fnvderz[e irlieal cvrn- ~ perme:tbilit►-; Ioir pacie[l; :cw ~ ;linzik-sErell ~Earink-ww_ , ~ pacencisi. pvrenti:il_ ~ Spakazie (SpC, Gt7ild---- 1pY s'l1PT- NOt zLlit» GpOd_ _ _ _ CIl$}iS iu:re[a[i13iliav to Low -fabiiirr- tIot;(-r.ite to Spc), SrC, SrE, f a$le. ahlr. Frost acEiv3s; :nod- senasperr:1610 ro r:iificl ~(•r- pnrt aF SsC, erate to rapid in~~aer~'iaLs lirs• SsE, StC, StE, ~ peri neabiiitic-; lv«° n•han con:- zntl 5uE). I s#►ritik-sn-ell parled; faor ~ patential Aaruik~swril patetitial. i i ! ~ - ~ ~ Spa•uagclale (Sw 8, Fair------- Goad- t' ery goocl_ Sliehtsu::ceptibxlit}• t❑ 'Mo[lei•ure to high ~ Rspz(l to rcrv SxB, SyB, SxE). ' i frvst artion, rapi(i scabilitr, __-C:ui- r•apid pei•me- YT] i-C'1`r Y&ptd peIIII6- &]CrvS9i.IS FO . 3B]PlIYi- ubiliGr; lan• shnink- per.•:ous when sn•ell pateiztial. compacted: Zan ~ shrink-sweU ~ patentiut. - r P i A i ` . t TeRva (Te 8, TeC, Noe zuie- ;-Nor :uit- k'a9r_ :llaclerate to high sus- yIodernte stabIty; ~ 1lorJea•afe to ~ Te D, p$z•t of ahle. ' ahle, eeptsbilit•' to frast semiperti-iow t❑ 1 rapici pGr:ne- . Tk[?}, ~ action, m.oderate to impervaou: al»lirj. ~ rap;d perinealailitr; n hen rvmFaac#- i loir shrink-snell ed, low 4hrizk- ~ poterxcisi. swell pazea-~`sl. e ~ I k 3 ' ~ I L-"g { U hA, Uh 8, Gaod_ 1 ot suit- ~ 1vt auit- Fair----- "IladerAte to very hagh i4foderate stabil- ~ lfodea•are per- u mC, part of ahle. sl~ie. susceptibility to its ;;em"sp~r'o~~: • mcaiaalitr. G n B and Co B} Prast acti6n ; rnud- to ianpervioa3 ~ erate permeebiiitpz whea com- ~ losv to madsrate pucted; Iorr eo shr¢nk-snedl moaierate shnnk-' p potential. sn-ell poteatta3. ~ I ~ Vessar silt laem F'air t❑ 1ot sust- ~-Nvt suit- Fnir_ Moderate to very hig& lladerstc siabiI- j_lIodersste to (VaG, Y'aD, gatt ,{OOr. a61e. abie. suscegtibiIity to itv: serns'pcrrious ° modcratelr af V5D)• frost activn; mod- fa Finperraous ~ rnpicl perane_ . erate to mQdcrutely irhen ear~- ~ ei~iEit~•- rapirl permeak~:li#~~ ; gacted; Pow ro ~ lN to modeaate mnclerate shruik- s sbnnL•-sR•eu sss-etl patenriai. potential. ; i ~ See foaanote nt ead at tabI?. . ~ sParIM CoUN=, WAS=GToN 103 _ 'opaz•ties v f soizs-Conti.nued 4 avil `eatures affecting-Continueci i I Fnrrn pvnds-- Cantinued Agricultural Te17ACea' 3IId Scn`a~e disgtfsa€ drunagc Trrigatian di~•crsinns V1"afenra}•s rielels Trafficabilaly E:izbaiikment • 4w shaar strength; _l~~derate per- _lIader:xte is~- illaderate re- :l~s~dernte resis~ .lPoderatie per- `~.D~C 9bL`aP iinperE•ictus n hen rrseabdity. Cake rate sistance to snee t❑ erosion, ineabilstv; srreEagth; corxtpacted; sligiit high trater- erosian; lugle naEer- ~ifgh nater- j m4derate I camgrecsib'slity; hplding rxx+ader$te hoid'sng capac- holding i LO'1CL-C31'YTjriIlg rnvderace capacity. permeability. ity; vegecation capaciur. cagacity; st:~hili€.- diffic~ilG to masieE':ite establYSh. permeability. I a,vn• =1ze.ar streiigth; iTodernte to 'Moclerate to .lloderate re- lIoelerate resist- :lIvder:tce to ? oxr shear se:ieiper+.-ious to rapicl per- rapid inta'se sistance t❑ ance to erasiom; rapid per- sTrerag[h; high inxper~•ivtiss ~~-heu meability. rate; ano~i- ervsion; mvc!- masierate to loev :neak~ility; ia:sd-carrying couipacterl. erite to lvw er-tre to rapid water-halcling moderate ta capacitr; ~ n°ater-hol[Lg permeabdxtr. csgacity; vege- 1vw n-zter- moderate to 9 ° capacitr.•, faxivn dif&ciilt holding , :apid per- I to eara6lish capicitr. mgabllity. excepc on arcis af L pokane lonan, nhere it ~ 19 f.liPi}' e.'1sv to estabitsh aaid n heA e n 2ter- Wars; are lakelr I to be needecl. ' ~ EIigEa sliear streugttz, , Rmpid to very RapirJ intrska 2-Mvcfsrme to la►v ]Iaderate to £ow Rapid to verr ;~3a shear semipervious to rapid perme- rate; mvder- resiz-cance to resistauce t❑ rapitl pernie- srreiigth; high perviots: wheai qhility. ate to lo►r ero=ion, ragid eroriau, moder- abilix, mocter- [oad-carrymg couipict2d, witer-hvlciiziz to r•en rapzd rLt.e to lon water- nte to lotr , capuaiGy; rapid ~ sligbLt cv«ipressi_ capacitr, gersnEabsl'str. hvldsug cnpaeity; svater-'haldi:ig ,a 'k•erc rapic£ bnixtr iiipderate j regetRrion £airly capacitr. aermeabi3ity. to liisCa stitsilitv, r difficulc t❑ di~'i- - ' ~ CLIIC LQ 9St3bI15h, ~ clepending rn , . , cobbPestotie ~ . 1 cvlicelit. .ow z-he.tr sGreszgth; _l~vdera#e to ~.lioderatn to l-Iorlera7e to lon- _1To[lerate to Ian Moderate to T atir aliear senupez rious to ' a•apid pernze- ~ Claw intab:e rezisrance 4fl t-esistavice to rnpid pem-,e- srreaigrh; ~ fiuper■-ipus R-hen ; nbility rate; snode: erosion; navd- erosiQ:i; rnoder- alaslixs-; macl- asoderate load- coin~asered; ate n-ater- erate to rnpici ate n•acer- erate ~rnter- cari•ying :nediiiua cotupims- I hralding c:e- permeahtlasr. !iQlding enpac- hvlcEing ca- ripacity, mvd- ihiiirr, uiodea•- ~ pacitti. icy E-egetation pmlcv. eracQ t❑ rapid ite sr: bslit?•. Fairl.° easv to aermeability. ~ 9 I estlblish 'where ' ivaeer«•si•s are likedr to be i nEedeti. ~ a.vw she.zr streiigtla; ~_lIaderate _lfoePcia'[e to lladerste to lvry Mvderate to lan• _l~o[lerate low shcsr sesxiipes•vyoiis to ; permeability. slnw antake se:i.ianee to resistaFice to persneak~lit.•; =ere:zgth, it~iIae~•sasis ~vliell 1 r:ete, iiigh :v ero;i❑n: mr~d-' erosioii, high to hagks mven• mvrlerate to ❑v:FiPacte€1; ~ ver-v h;gh erate perme- -i•en• hi;h high R-ater- lvn- to:zd- mer~iLim cv~a~precs- ' n',xter-holcliag alailitir n•;~ter-iaplcling ]aoltLing , carrying I ihs13¢v. lan• : capacit`•. npsearr; i-cge- cnpasicE. rapacit}•; 5L.1bilitr. I tatian ensy t❑ at[]derate E estabUsh. ~ peruieataility. kIvc3erate stienr lXvderate to 3loderate iata'se Moderate _lloderate resist- :1Toderaee to ~'Maderate shear E stt-engrh: semi- mnderatelp r:tte; mcrder- resisfance to anre to erosiou; xnoderately srreugth; E Pervivers to irn- mpid perme- ate ir:sier- erosian; mad ma~lerate n-aLter- rApid perme- ~noderst.e laa~ per~-iaa~s ~~l~en ability. lxalding erate to holding capac- abiiftr. med- c3rrying caznpaeted, cagaciLy. moderatelv ity, ti•egetatzan ernte water- cagncity; mediuin cvrupress- rapid perme- easy to estnYr hvltiing moderatc to p ibility, lon- abilitr. lisEL n*hese capacity. moderately 4 sttihilir}-, nafiern•ays ure rapid likely to bs permeability. neQCled. _~s-7a.i--+4c-g ~ ~~~~G"y ii"Y'~ CDFF-SITE FLO'WS C]ff-site topograghy a.nd existing development in the surrnunding arear mitigates the ampact vf off==site fl4ws to this subdivision. After an extensive field visit, off-site effects to this subdiuisian are as fvllDVVs: 1) Pines Cemetery is lacated to the south and adjacent to the plat baundary. Grades in the cemetery prevent flow an to the site. 2} Existing grades alang the east plat bvundary flow to the Nvrtheast and away fram this site. 3} DeVelaprrient to the north flaws to the east. kmprcavements to 12th Avenue will prevent off-site flvw from cvming onta our praper[y. 4} Flows along the west glat botandary firQm back yards on thas site and the adyacent development will flow ncrrih to 12th Avenue and then flow west to a lcrw paint. pines.doc r~~ ~ ?r~.? ~ ~~~~r~.`~ Gar ~ I ~~~~Trt J 7'07~9 A rZAE-4 ' . ~ ~ . 7•-7 `7 nine7u~ j ~i~~~ _ ~ ~►i+~b~SF` /I ~~'T ~ 0 ~ 4Z2T l-jJEOg.#q al -s 5s- oo~~ I G~ 4/t X ~J.-5 Q V~i~ A !~Fvlti L. vs& 3tP cN A e- UV~L►G]-~[+r~ y ~~r ~S~r'~ 3r14 r 4b J r~ce-Io", = 45, ~-q. • ~.s I? v/1616. =S Z-;?,~~A CTV A L ~ = ~~~r ~c~ ~ f' % ~ n l0~ ~3~7 ~~2•`~J~'= G~h~~ = r ~ ~ ~ ~ ~ ~ ~c~►~~ w~ • '~j / cy- L a ~ ~ 35r ~ ~ ~ ~ . ~-aT~+ ~ ~►~~t y 7 Iq ~ ~ _a„ ✓ 44~1 7 57 74 J ! .a..r ~ 14( - ~'_Cfr 7~1 r~i~ + ~ 77- ~ a ~ y' ~ T6'9 l- ~!!~~-i~ s6 rr ~~iNcrv V*'Oo ~ ~ z 45z-~ > 4.5 ~ ~ ~ ~ I~ ~ ~ ~or►~~ ~1r~~ .54 T,Nvl 1 , ~ F ~~q-~ - ~ ~ ~ ~ ~ ~ ~ J Juy~ y 54 .y ~ee . 74~ e/4a ?&f3~~ ± ~ T! ~ /r 6o,,2 ~ ~ x0e. Tor4~- ,#-r~Aq _ ~ r~ ~ ►r~} - l ~ r~ ~ _ ~ (o~ • Ig - v4e I Ae; 4~.+I'j 1 0~ q6o aog~ Al ~ = ' ~ = ~ ~c ~r -4 8~(-7~~ ~~~L- A4a-tpi ~ ! /i z ra~ ~a~'D 1.1 - f. ~ [ • S p wIAC, I C--20nr-> B0OV5TRING METHDD (TEN YEAR ST(3RM DESIGN} PROJECT: V. PIlVES ~ DETENTI[7N aASIlN DESIGN BASIN: BASIN-A REVIEWER: GSM NUMBER QF DkYWELLS PRC7PC35EI] DATE: 19 Dct 97 Q Single (type t4 I Dvuble (type B) Total Area (calc.) {s€e Hl} 2.13 7ime af Conc. (catc.) (see H1) 6.90 - Coinposite "C" (calc.) (see H1) 0.40 Tune of CDne. (min) 6,90 Arrea {Acres} 2.19 C' Factor 0.40 Asphalt Are.a (sq. ft, ) 16613 ~ Volume Provided 1021.5 Outflo❑a (cfs) 1 Area * C" Faetor 0.89 ~ 41 42 93 #4 #5 #6 #7 Tiitne Time Iratensity Q dev. V in V out Stvrage Tnc. Trac. (mirL) (sec.) (in.lhc.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (91*60) (A*C*#3) (C3ut£*#2) {#5-#6} 6.90 413.84 2.82 2.50 1386 413.84 972 5 300 3.18 2.81 1131 300 831 10 600 2,24 1.98 1468 604 868 15 900 1.77 1.57 1630 900 730 20 1200 1.45 1.28 1720 1200 520 25 1504 1.21 1.07 1757 1540 257 30 1800 1.(}4 0.92 1786 1800 -14 35 2100 0.91 0.81 1845 2100 -295 40 2400 0.82 4.73 1844 2400 -556 45 2700 0.74 [}.65 1860 2700 -84(] 50 3000 0.+58 0.60 1890 3000 -1110 55 3300 0.64 0.57 1949 3300 -1351 60 3600 0.61 0.54 2019 3600 -1581 65 3900 0.64 0.53 2146 3900 -1754 70 4200 0.58 0.51 2228 4200 -1972 75 4500 0.56 0.50 2300 4500 -2200 ~ 80 4800 0.53 0.47 2317 4800 -2483 { 85 5100 0.52 0.46 2412 5100 -2688 90 5400 17.50 0.44 2452 5400 - -2948 95 5700 0.49 0.43 2533 5700 -3E67 j 104 6000 6.48 0.42 2649 6000 -3391 I7RAIlVAC'rE PDNL7 GALCULATIONS Required grassyr swale prmd stvrage VoIume = Irnperviaizs Area x.5 in.l 12 m.lit. = 692 Cu. ft. Grassy swale pond volurne provided = 245 nRYWELL uEQuIREMErirS - Lo YEAt DESFGrr STORM Maxanum storage required by Bawstrmg = 972 cu. ft. Numter and type nf Drywells Required = U Single 1 13auble TIlVTE DF CONCENTRATTON (aninutes) Tc {overland} Tc (guiter) ~ Ct= 0.15 L2= 557~ 21- 0.16 ~r L1(A) = 60~ Z2 = 5fl ~ N(A) = 0.4 Z B = 4 S(A) ~ 4.02 n a 0.0 16 ~ s = 0.017 ~ 'I'c {A} ~ 3.27 d = 0.24 L 1(B) = 0 Tc {gu} = 3.63 N(B) ~ D Tc(A+B) = 3.27.1-11, S(B) _ 0 TG(tot. ) = 6.94 Tc = 0.0 Itttensity = 2.82 Aceas "c" A*C A = 0.97827675 WF = 10.0770 ~ 0.35 0.900.342 R = 0.0971 1.81 0.30," 0.543 V = 2.56 0.00 0.00 Q Tc(gu) = 3.63 0.00 0.00 0 Q(est) _ 2.54 4.00 fl.t30 0 0,00 0.00 0 Holdiiag = 19.85 4.00 0.00 0 Total A Ct7mp "C" 2.19 0.40 Q=C *I*A= 2.50 Q(est-) = 2.54 Tc (tatal) = Tc (overland) + Tc (gutter) Tc {overland} = Ct'(L 1 *Nf5^0.5)NN9.6) Ct = 0.15 L I =Length of Overland Flow N= friction faetar of overland flaw (.4 for average grass ctver) ~ S= average slope of averland flvw Te (gutter) = Length (ft.)IVelocity (ft.Isec.}I60 B = Hattom widtth of gutter or ditch Area = d*B+d"212*(Z1+Z2) Z 1= iuverse of cross slope one of ditch Z2 = inr+erse of cross slope two of ditch d = depth of flow imm gutter (estirnate, check estinmte with Flvw) - Wetted peritmeter = S*d+{ 11sin(aCn(I1Z l))+Tlsin(atn(11Z2))) Hydraulic Radixs = R = Area/Wetted Pecimeter Velacity = 1.4861eR^.667*s^.S FPow = Velocity*Area n = 0.015 for asphalt s= Iongitudinal slope of gutter BO'VVSTRING METHC3D (TEN YEAR STOR.M DESIGN) PROJECT: V. PTNES ~ DETENTIQN BASIlN DESTGN BASIIV: BASIN-B HEVIEWER: CrSM N[7I1+,~BER QF I]RYWELI,~ PROPC]SED T]ATE: 14-Oct-97 1 5ingle (type e? 4 T)ouble (type B) ~ T'otal A.re.a (calc. ) (see H 1) 0.62 - Tune of Gonc. (calc.) (see Hl) 5.10 Gomposite "C„ (calc.) (see H1) 0.43 Ti►ne of Conc. {min} 5.10 Area (Acrres) 0.52 C' Factor 0.43 Asphalt Are-a (sq. ft.) 5800 Valume Provideci 490 Chitflovv (cfs) 0. 1/ Area * C° Factor 0.26 ~ #t 93 #4 45 96 #7 Time Time tntensity Q dea. V in "V out Storage Inc. c min-) {sec ( (in.lbr.) (cfs) (cu. ft.) (cu.. ft.) (cu. ft.) 1 *60) (A*C*#3) COutf.##2) {#5-#6} 5.10 305,93 3.16 4.8.3 342 91.78 250 5 3(]0 3.18 0.84 337 94 247 10 6(]0 2.24 0.59 416 1$d 236 15 400 1.77 4.47 469 270 199 20 1200 1.45 0.38 499 360 139 25 1500 1.21 0.32 512 450 62 341 1804 1.04 0.27 523 540 -17 35 2100 0.91 0.24 529 530 -101 40 2400 0.82 0.22 542 720 -178 45 2700 0.74 0.20 548 8i0 -262 50 3400 0.68 0.18 557 900 -343 55 3300 (].64 4.17 575 990 -415 60 3600 0.61 0.16 596 1480 -484 65 3900 0.60 0.16 634 1170 -536 70 4200 0.58 0.15 659 1260 -601 , 75 4500 0.56 0.15 681 1354 -669 80 4800 4.53 0.14 686 1440 -754 ' 85 5100 0.52 0.14 714 1534 -816 90 5400 0.50 0.13 727 1620 -893 ' 95 5700 4.49 0,13 751 1710 -959 104 GDQD 0.48 0.13 774 1800 -1026 DRAENAGE POND CALCULATIQNS Required grassy swa3e pond storage vnlume = Imnpervious Area x.5 an.l 12 in.lft. = 242 cu. ft. ' Grassy swa1e gond vvlume provided = 245 QRYWELL REQUTRENTENTS - 10 YEAR UESTGN STORM Maximum storage requireci hy Bawstring = 250 cu. ft. Nrumber and t}+pe of Drywells Required = I Siagle 0 DaubPe T'IlI4E UF CQNCENTRATI[71V (minutes) Tc (averland) Tc (gutter) ~ ~ Ct = 0.15 L2= ? 15 Z1= 0.16 Ll(A) = 50 Z2 = 54 N(A) = 0.4 B = 0 S(A) = 0.02 n = 0.016 ~ s = 0.011 Tc (A) = 2.93 cl = O. 142 ~ L1(5) = 0 Tc (gu) = 2.17 N(B) = fl Tc(A+B) = 2.93 S{E3} = D Tc(tot.) = 5.10 Tc {B} = 0.0 Tntensity = 3.16 Areas "C„ A,*C A = 0.5057131 2 W - 7.2452 0.13 4.90 0.117 R= 0.0698 0.49 0.30 0.147 V= 1.65 , 0.00 0.00 0 TcEgu3 = 2.17 ~ 0.00 0.00 4 Q(est) = a. $3 0.00 0.00 0 ~ 0.00 0.40 0 HQlding ~ 7.66 4.{)t1 0.00 0 `I'at,al A Coxnp „C" 0.62 0.43 Q=C*I*A= 0.83 Q(est.) = 4.83 Tc (#atal) _ Tc (averland) + Tc (gutier) Tc (averiand) = Ct*(L,1*NIS"0.5)^0.6) Ct =0. 15 L1 = Length of (]verlartd FIaw N- friction factor of averlaxad flaw (A for average grass cover) 5= av erage slope of vverland €low Tc (guttu) _ Length {ft.}Nelocity (£t.lsec,)I"SO I3 = Battom wicith of guner r ditch Area = d*Bfd^2f2*(ZI+Z2) Z 1= inverse of crass slope one af ditch Z2 = invers€ of cross slope twn af ditch d= depth of flvw in gutter {estimate, check estitnate with Ftow} Wetteci perizneter = H*d+{ fl Isin(am{ 1!Z 1})+1 Isin(ata(11Z2))) Hydraulic Radius _ R = Area/Wetteei Ferimeter Velocity= 1.486In*R".657*s^.5 Fiaw = Velocity*Area n= a. 0 16 for asphalt s = longitudinal slc,pa af ,gutter gaws~RJNc METHan (TEN YEAR sToRM DEsrGN) PRaJEcT; v. Pnv£s DETENTTQN BASIN DESIGN $AS1N: HASAN-C REVIEVVER: GSM NUM13ER {JF DRYWELLS PTfG7AC3SED F]ATE: 10-Oct-97 0 5ingle {type P 1 Dauble (type B) ~ Total tarea (ca1c.) (see H 1) 2.33 Time of Gonc. (calc. ) (see H 1) 6.37 Cvmpnsite "C" (ca£e.) (see H1) 0.42 ~ Time qf Conc. (min) 6.37 Area (Acres) 2.33 C' Factor 0.42 Asghart Area (sq. ft.) 19554✓ Volume Provided 1251.5 C?utf'low (c£s) l•+r Area * C" Factar 0.97 #1 42 #3 #4 #5 #6 #7 Time Time Intens'rty' Q dev. V in V out Storage Imc. Inc. (min.) (sec.) (iLIhr.) {cfs} (cu. ft.) (cu. ft.) (cu. ft.) 1 *60) (A*c**3) tOutf.*#2) (#5-46) ~ 6.37 382.17 2.42 2.83 1450 382.17 1068 5 300 3.18 3.08 1239 340 339 14 600 2.24 2.17 1584 600 984 15 900 1.77 1.72 1766 900 866 20 1200 1.45 1.41 1869 1200 669 25 1500 1.21 1.17 1411 1500 411 30 1800 1.04 1.41 1945 1800 145 35 2100 0.91 0.88 1966 2100 -04 40 2400 0.82 0.79 2010 2400 -390 45 2700 0.74 0.72 2029 2700 -671 50 3000 0.58 0.66 2062 3004 -938 55 330(} 0.64 4.62 2127 3300 -1173 60 3600 4.61 0.59 2205 360(} -1395 65 3900 0.60 4.58 2343 3900 -1557 70 4200 [}.58 0.56 2434 4200 -1766 75 4500 0.56 0.54 2512 4500 -1988 sa 4800 0.53 0.51 2532 4800 -2268 85 5100 0.52 0.50 2635 5100 -2465 30 5400 0.50 0.48 2679 5400 -2721 95 5700 0.49 0.47 2768 5700 -2932 100 6000 0,48 0.47 2851 6000 -3149 DRATATAGE PC3ND CALCULATI[JNS Required grassy swale pond storage volume = Tmpervious Area x.5 in.l 12 in..Ifc = 815 Cu, ft. Grassy swale pond wolume provided = 830 I3RYWE1IL REQUIREMENT'S - la YEAR DESIGN STORM Maxitnum storage reqtaired hy Bowstring = 1068 eu. ft. , Tfumber and xype o#'DywelLs Required _ 0 Singte ~ 1 Double TIME QF CQNCEIVTR.4TIQN (minuTe.s) ~ Tc (overland) Tc (gureer) Ct= 0.15 L2= 492.02 ~ 1 Z1= 4.16 L1(A) = 60-/ ZZ = 50 N(A) _ (}.4 $ = 0 S(A) = 0.02 n = 0.016 ~ s = 0.01"11 Tc (A) = 3.27 d = 0.21 L1(B) = fl Tc(gu) = 3.I0 N(B) = 0 Tc(A+B) = 3.27 S(B) = 0 Tc(tat. ) = 6.3 7 / Tc (B) 4.0 Intensity = 2.92 / ~ Areas "c„ A*C A = 1.07450368 WP = 10.5413 0.45 {].90 0.405 R = 0.1016 1.88 0.30 4.564 V = 2.64 0_04 0.00 0 Tc(,gu) = 3.10 0.00 0.00 0 Q(est) = 2.83 0.00 0.00 4 0.00 0.00 0 Hotaing = 17.53 0.00 0.00 0 Tatax A Comp "C" ~ 2.33 0.42 ~ Q-=C*I*A= 2.83 ~ Q(est) = 2.83 i Tc (total) = Tc (overIarid) + Tc (gutter) Tc (overland) = Gt*(F.T*NIS`'Q.5)''0.6} Cfi = 0. 15 LI = Length of fh+erland Flow N= frictioa factor of overland flow (A fvr average grass caver) S~ average sPope af overland flow Tc (gutter) = T.ength (ft.)NeYocity (fLIsec.)160 H=Battom wic#h af gutter or ditch Area = d*B+d^212*(ZI+Z2) Z I = inVerse of cross slape one af d.itcfi Z2 = inverse vf cross slope twn of ditch d= depth of flow in gutter (estimate, check estimate witfi FIow) Wetted perimeter = H*d+{ Ilsin(atn(l lZ l))+llsin(atn(I1Z2))} Hydraulic kadiuRs = R = Area/Wetted Ferimeter Veiocity = 1.4861u*R^.667*s^.5 Flovrr = VeiQCity*Area n=0.016 for asphaYt s=longitudsnal slope of gutter BC7VVSTRING NfETHf]D (TEN YEAR STORM T3ESIGIV) PRC?.1ECT: V. PLNES ❑ETENTION BASCi+F DESIGN BASIN: BASIN-a R.EV[EWER: C'sSM NLTMBER (3F DRYWELLS PROPflSED DATE: 10-Oct-97 1 Single {type P 0 Z}auble {type B} ~ Total Area (calc.) {see H1} 1.17 Time af Conc. (calc.) (see HI) 6.99 Composite "C" (cale.) (see H1) 0.45 1 Time af Canc. (min) 6.99 Area (Acres) 1.17 C' Factor 0.45 Asphalt Area (sq. ft.) 12792 Volunte Provided 1000 []utflow (c!'s) 4.3v Area * C" Factor 0.53 #1 92 43 #4 45 #fi 47 Time Tirne Lntensity C? siev. V in V nut 5torage Inc. Fnc. (min.) (sac.) (in,Ihr.) (cfs) (eu. ft.) {cu. ft.) (cu. ft.) l *60) (A*{C*#3} (Outf.*#2) (#546) 6.99 419.58 2.81 1.47 828 125.87 702 5 300 3.18 1.67 671 90 581 1 10 5017 2.24 1.18 873 180 693 15 900 1.77 0.93 969 270 693 20 1200 1.45 4.76 1022 360 662 25 1500 1.21 0.64 1043 450 593 30 1800 1.04 0.55 1061 540 521 35 2100 0.91 0.48 1071 634 441 40 2400 0.82 0.43 1095 720 375 45 2700 0.74 0.39 1104 810 234 50 3000 0.68 4.36 1122 304 222 55 3300 0.64 0.34 1157 930 167 60 3600 4.61 0.32 1199 1080 119 65 3900 0.60 0.32 1273 1170 103 70 4200 0.58 0.30 1322 1260 62 75 4500 0.56 0.29 1365 1350 15 80 4800 0.53 0.28 1375 1440 -65 85 5100 4.52 0.27 1431 153(] -99 90 5404 0.547 0.26 1455 1620 -165 95 5700 0.49 4.26 1503 1710 -207 100 6000 0.48 0.25 1548 1900 -252 I)RAiNAGE FUNL? CALCULATIONS _ Requared grassy swale pr3nd storage valume ' = Tanpervi4us Area x.5 in.I 12 in.lft. = 533 cu. ft. Grassy swale pand voPume pravided ~ 550 DRYWELTI REQUIRENIEN'I'S - 10 YEAR DESIGN STC]RM Nlaximum starage requirei by Bawstrmg = 702 cuu. ft. Number and fyge of Drywells Requirei = 1 Single 0 I?ouble TIIViE pF CONCENTRATIOFV (minutes) Tc (overlanri) T'c (gutter) ~ Ct = 0.15 L2= 41CYV Z1= 0.16 L1(A) - 60/ Z2 = 50 ~ N(A) = 0.4 B - fl 5(A) = 0.02 n = 0.016 s = 0.01 Tc (A) = 3.27 d= 0.18 Lf (B) = Q Tc (g,u) = 3.73 N(B) = 0 Tc(A+B) = 3.27 , S(B) = U Tc(tot, ) = 6.99 Tc (B) = 0.0 Tntensity = 2.81 Areas "C„ A*C A = 0.80000084 W= 9.1127 0.29 0.90 0,251 R= 0.0878 0.88 0.30 0.264 V = 1.83 4.00 0.00 0 Tc(gu) = 3.73 O.Q0 0.00 0 Q(esi) = 1.47 4.0{? 0.00 Li 0.00 0,00 U Halding = 14.61 0.00 0.00 o ~otal A Comg nCl, 1.17 0.45 Q--C*T*A= 1.47 Q(est.} = 1.47 Tc Crotal3 = Tc (overlana) + Tc cguttery Tc (overlamd) = Ct*(L 1 *N1S"0.5)^^4.5) - Ct =0.15 LI = Length of DverIaud FIlow N= frictinn factor of averland flow (.4 for average grass eover) S= average slope of averland flcaw Tc (gutter) = Leugth (ft.)'Velocity {ft.lsec.}160 B = Bottom width of gutter ar ditch Area = d*S+d^212*(Zl+Z2) Z 1= inverse of cross slope one of ditch Z2 = inverse of crvss s1Qge two of ditcb d=depth of flow in gutter (estimate, rheck estimate with FIow) Wetted perimeter = S*d+{llsin(atn(1fZI))+l Isin{atn(11Z2)}} Hydraulic Radius = R = A,realWetied Perimeter Velcicity = 1.4861n*R^.667*s^.5 Flow = Velocity*Area n= 0.016 far asphalt s =1ongitudina.1 slape of gutur I BOWSTRING METH(3I7 (TEN YEAR STQRM I]ESIGN) PRL]JECT: V. PNES D£TENTitJIV BASIN DESTGN BASIlV: BASIN-E F.EVIEVVER: G5M NUMBER QF DRYWELLS T'ROPCJSED DAT'E: l e-C]ct-97 0 Single {type A 1 Dauble (rype B) TotaG1 Area (calc.) {see Hl} 2.43 Time of Conc. {c,alc. }(see Hl) 5.64 C[3II1pC351tQ (CSiG.) (SE'~ 0.41 Time of Canc. (min) 5.64 Area {Aeres} 2.43 C' Factor 0.41 Asphalt Are.a (sq. ft.) • 19802 - ~ Vvluine Provided 1127 ~ C)utflow (cfs) .Y 1• Area * C" Facfor 1.00 41 #2 #3 #4 #5 #6 #7 Time Time Intensity Q dev. V in V saut Stcrrage Tne. Inc. (iillri. ) (SeC. ) (1I1,IhI. ) (Cf5) (Cll. ft.) (CLI. ft. ) (CiP. ft.) 1 (A*C*#3) (Ollff *42) (#5-#6) 5.64 338.31 3.06 3.0e 1386 338.31 1047 - 5 3170 3.18 3.18 1277 340 977 10 600 2.24 2,24 1600 600 1000 15 900 1.77 1.77 1795 900 895 20 1200 1.45 1.45 1905 1200 705 25 1500 1.21 1.21 1952 1500 452 • 30 1800 1.04 1.04 1490 1800 190 35 2100 0.91 0.91 2414 2100 -86 40 2400 0.82 0.82 2060 2444 -340 45 2700 0.74 0.74 2081 2740 -619 50 3000 0.68 0.68 2116 3000 -884 55 3300 0.64 0.64 2183 3340 -1137 6(] 36(]0 0.61 0.61 2264 3600 -1336 GS 3900 0.60 0.60 2407 3900 -1493 70 4200 0.58 0.58 2500 4204 -1700 75 4500 0.56 0.56 2582 4500 -1918 80 4800 0.53 0.53 2642 4800 -2198 SS 5100 0.52 0.52 2709 5100 -2391 94 5400 4.50 0.50 2755 5400 -2645 95 5700 0.49 4.49 2847 5700 -2853 ioa 6000 0.48 0.48 2932 6000 -3068 DRAINAGE POM] CAT.CULATIQNS Required girassy swale pond starage voluzne = Impen+ieus Area x.5 in.A 12 in.l& = 825 cu. ft. Grassy swale pond volume provided = 832 DRYWELL REQL]IREMEN'$`5 - 10 YEAEt DESICrN STORM Maximum storage required by Bowsving = 1047 cu. ft. Number and type of Dcywells Required = Q Single t I7oub1e TIlvIE C]F CONCENTR ATIC?N (minutes) Tc (overland) Tc (gutter) D Ct- 0.15 L2= 426 Z1- Q.~6 LF(A) = 60 Zz = 50 N(A) _ 0.4 H = 0 5(A.) = 0.02 n = 0.416 s = 0.0226 Tc (A) = 3.27 d = 0.20 ~ Ll(B) _ 0 Tc (gu) = 2.37 N(B) = 0 Tc{A+B} = 3.27 _ S(B) - 0 ~ Tc(tQt.) = 5.64 Tc (6) ~ 4.0 Intensity = 3.06 Areas 'oC" ` A*C A= 1.02336432 W = 10.3066 0.45 0.90 0.405 R = 0.(}993 1.98 0.30 0.594 V = 2.99 0.00 0.00 0 Tc(gu) = 2.37 ~ 0.00 O,IDt] U Q{est} = 3.06 0.00 0.00 0 0.00 0,00 0 Holding = 15.1$ 0.00 U0 0 Total A Comp "C" 2.43 (1.41 Q=e*I*A= 3.06 Q(est.) = 3.06 Tc (tatal) _ Tc {o❑ecland} + Tc (gutw) TG (overland) = ct*(i..1 *v/S^O.5"-6) Ct = 0.15 Ll = L,ength of C3verIand Flovv N=frictirnn facCar of vVerland flvw 0 for average g}`ass caver) S= awerage slope of over]and flow Tc {gutter} = I.,ength {ft.}IVelocity (ft.lse,c.)160 B= Svttom width of guttu or ditch Area =d*B+d^ZI2*(Z I+Z2) Z1= inverse of crass slcrpe ane of ditch Z2 = inverse of cross sloge twn of c3itch , d=depth of flo►v im gutter (estinaate, check e5tinmte writh Flow) VV'etced perimeter = B*d+(llsin(atta(l1Z1))+llsin(am(11Z2)}) , Hydraulic Radius ~ R = AreaJWetteti Pex'imeter ~ Velocity =1.4861n*R".G67*s^.5 Flow = Velacity*Area n= 0.0 16 far asphalt s=longitudmal slape df gutter sOwsTRING nETHon (~~N YEAR sTORm aEs~GN) PROaECT: V. PaNES ~ DETENTIQN BASIlV DESTGN BASIN: BASIN-F REVIEWER: GSM NC]NTBER QF DRYWELLS PRaPOSEL'] DATE: 1O-Oct-97 1 Single (type P 0 I]ouble (type B) Tatal Area (carc. )(see H 1) 1.29 Time of Canc. (ealc.) (see H1) 5.0(} Cvmposite "C" (ealc.) (see H1) 0.39 T'une of Conc. (miu) 5.00 Area (Acres) 1.29 G' Faetor 0.39 Asphalf Area (sq. ft. ) 8741 Volume Pravided 750 Oratflow {c£s} 0.3 Area * C" Factar 0.51 1 #t 42 43 #4 #5 #5 #7 Tirne Time Intensity Q dev. V in V aut Storage Pnc. Itic. {min.} (sec.) (in.lhr.) (cfs) (cu. ft.) (cu. ft.) (cu, ft.) i *60) (A*c*#3) (Outf.*#2) (#5-#6) 5.00 300.00 3.18 1.61 648 90.00 558 5 300 3.18 1.61 648 90 558 10 600 2.24 1.14 797 180 517 15 940 1.77 0.90 899 270 629 20 1200 1.45 t?.74 357 360 597 25 1500 1.21 0.61 983 450 533 30 1841o 1.04 0.53 1003 540 463 35 • 2140 0.41 0.46 1016 630 386 40 2404 0.82 0.42 1040 720 320 45 2700 4.74 0.38 1051 ' 8io 241 50 3000 0.68 0.34 1064 900 169 55 3304 0.64 0.32 1104 990 114 60 3600 0.61 0.31 1145 1080 65 65 3900 0.60 0.3(] 1217 1170 47 70 42410 0.58 0.29 1265 1260 5 75 4500 4.56 0.28 1,307 1354 -43 j 80 4800 0.53 0.27 1317 1440 -123 i 85 5100 0.52 0.26 .1371 1530 -159 90 5400 0.50 0.25 1395 1620 -225 ~ 95 5700 0.49 0.25 1441 1714 -269 ' 104 6000 0.48 0.24 1485 1900 -315 DRAiNAGE PONI) CALCULe4TIONS Required ,grassy swaIe pond storage volume = Iruper►rious Area x. S in.f 12 in,lft. = 364 cu, ft. Grassy swaZe pond vnlume provided = 375 DRYWELL REQUTRENNIENTS - 10 YEA,R DESZCiN STORM Maxinnum stora,~ requued by Bowstriztg = 629 cu. ft. Number and rype af I7ryvvells Required = T Single 0 DoubPe TnvE OF eoNCENTrcAriaN (minutes) Tc (a~~~~~) TC (guccer) Cc = 0.15 Lz= 260 Zi= 0.1s L1{A} = 60 Z2 = 50 , N(A) ry 41.4 B= d S(A) _ 0.02 n = 0.016 ~ 5 = 0.0226 Tc (A) _ 3.27 a = 0.16 Ll(B) = a Te (gu) _ 1.70 N(a) w a rc(A+B) = 3.27 S(B) = a rc(tot.) = 5.00 Tc (a) = o.~ ~~ity = 3.18 _ Areas s,c„ A*C A = 0.63165711 wP - 8.0973 0.20 0.90 0.18 R = 0.0780 1.09 0.30 0.327 V= 2.55 0.40 0.00 0 Tc(,gu) = 1.70 0.00 0.00 D Q(est) ~ 1.61 0.00 0.00 o 0.00 0.00 4 Halding = 9.26 0.00 0.00 0 Total A Comp "C" - 1.29 0.39 Q=C*Z*A= 1.61 Q(est. ) = 1.61 Te {tatal} = Tc (overland) + Tc (gutter) Tc (Qverland) = Ct*(L 1 *N15^[1.5)^O.6) . Gt = D. 15 L 1=Len,gth of L7verland Flow N = frictian factcr of overland flvw (.4 fbr aVeeage grass cvver) S= average slope of overiand flow Tc (gutter) - Length (ft.)lVeltcity (ft.lsec.)l60 B=Bflttsotn width ofgutter or ditch Area = d*B+d"2I2*(ZI+Z2) 2I = Inverse of eross slvpe one of ditch Z2 = 1riVei'S8 of GTi}S5 524]Je 'CWO of CIILCIl d= ciepth of flow in gutter (estimate, check estitnate with Flaw) Wetted perimeter = H*d•+{llsin(afin(11ZP))+llsin(ain(11Z2)}) Hydrauliic Radivs = R = AreatWetted Feri.meter VeIoci[y = 1.485Jn*R^.667*s".5 F1aw ='Velocity*Area n=0.416 fnr asphalt s=1angituciipal slope o£ gutter BC3WSTRING METHCID (TEN YEAR STOR,M I]ESIGN) F'RCyJECT: V. FIIVES I7E7ENTION BASIlN DESIGN BASIlY: HASTN-G REVIEWER: +GSM - NUMBER OF DRYWELLS PROPOSED IJATE: 10-4Jct-97 1 Single {type A 4 Double (type B) Total Area (caPc.) (see 1I1) 0.57 Time of Conc. (calc.) (sae 141) 5.00 Composite "C" (calc.) (see H1) 0.46 TimeofCvnc. (naia) 5.00 Area {Acres} 4.5 41wlwo C' Factar 0.46 Asphalt Area (sq. ft,) 6553 ~ Voluzne Prcvided 530 dutflaw (cFs) 0.3 Area * C" FactQr 0.26 #1 #Z #3 #4 #5 96 #7 Time Time Intensity Qde►a. V isi V tiut Starage Tnc, Inc. (rinui.) (sec.) (in,lhr.) {cfs) (cu. ft.) {cu. ti.} {cu. ft.} (#1*G4?) (A*C*#3) (Chztf:42) (#5-#6) 5.00 300.40 3.18 0.53 334 90.00 244 5 340 3.18 0.83 334 90 244 10 640 2.24 0.58 410 180 230 15 900 1.77 0.46 463 27[] 193 20 1200 1.45 0.38 493 364 133 25 1.500 1.21 0.32 506 450 55 . 30 1800 1.04 0.27 516 544 -24 35 2100 0.91 0.24 523 634 -107 40 2400 0.82 0.21 535 720 -185 45 2700 0.74 0.19 541 814 -269 50 3000 0.68 4,18 551 900 -343 55 3300 4.64 0.17 568 994 -422 60 3600 0.61 0.16 589 1080 -491 ss 3900 0,60 0.16 627 1170 -543 70 4204 0.58 0.15 651 1264 -609 75 4500 0.56 0.15 673 1354 -577 ~ 80 4800 0.5.3 4.14 678 1440 -762 ~ 85 5140 0.52 0.14 706 1530 -824 90 5400 0.50 0.13 718 1620 -902 45 5700 0.49 0.13 742 1714 -968 100 6000 0.48 0.13 764 1800 -1036 I)R1-LIlNACiE POND CALC L1LATIONS Required grassy swale pond starage volume = Tmpetvious Area x.5 in.112 in,lft. - 273 cu. ft. Grassy swale pond woIume prowided _ 295 DRY'WELL REQUIREMENTS - 101EA,R DESIGN STORM Ndaxmum starage requared by Bowstrmg = 244 cu. ft, Number and type of DrynivelLs Requissd = 1 5ingle 0 Daubls TIlvffi OF CONCEN`I`RATION (minutes) Tc {etverland} Tc (guttez') ~ Ct = 0.15 L 16 ■ Z1= 16 Ck L1(A) = 50 22 = 5F~ ~ ~ ~ N(A) = 0.4 B = 0 Lj S(A) = 0.02 n t 4.016 ~ s = 0.0335 Tc (A) = 2.93 d= 0.12 L1(B) = a Tc (gu) = 1.07 - hT(B) = 0 Tc(A+B) = 2.93 • S(B) = a T'c(tot.) = S.UfJ Tc (B) _ 0.0 Intensiry = 3.18 Areas "cil A*C A= 0.3316$3 W = 5.8676 0.15 0.90 4.135 R = 0.0565 [].42 4.30 0.125 V = 2.50 0.00 0.00 4 Tc(gu) _ 1.07 0.{]0 0.00 Q{est} = 0.83 0.40 0.00 4 0.00 0.00 0 Hnlding = 5.70 0.00 0.00 0 T[7tal A CC11I1p "~,"ee 0.5'7 0.46 Q=C*I*A= 0.83 Q(e.st.) = 0.83 Tc (total) = Tc {overland} + Tc {gutter} TG (aveeland) = Ct*(T.1*NIS''"U.5)^U.&) Ct ~0.15 Li 2= Length of fl►rerlaatd Flow , , N= friction factor of nverland flow (.4 for average grass cover) S = average slope of overland flow Tc (gutter) _ Length (ft.)IV'elocity (ft.1see.)I64 B= Bottom rvidth of gutter or ditch Area - d*8+d"212*(Z 1+22) Z 1-inverse of crass siape one of dftch Z2 = inaerse of crass slrape tv►+o of diteh d= depth of flvw in gutter (e,stimate, check estinmte with Flarv) Wetted perimew =B*d+( l lsin(atD{ g 1Z1})+llsin(am(11Z2))) HydrauIic Radius = R= ArealWeitted Perimeter Velocity = 1.$861n*R^.667*s".5 Flow = VePocity*Area a=0.0 16 £ar a,sphalt s = longitudinal slope of gutter ` I BDWSTRING 1VfETHDD (T£N YEAR STORM DESIGIY) PRO]-ECT: V. PAfES DETENTION BA5TN DESTGIV BASTAI: BASIlN-H RE'VZEWER: GSM NL]Mi3ER UF DRYWELLS PROPQS£D DATE: 10-Gct-97 l Single (type A D 17ou4ale (type B) Totai Area (calc.) (see Hl ) 0.68 Time of Conc. {calc.} (see H 1) 5. a0 Campnsite "C" (caic.) (see H1) 0.53 Time of Cvnc. (rnin) 5.00 'o~ Area {Acres} 0.6$ {C' Factor 0.53 Asphalt Area (sq. ft.) 11124 ~ Voiume Provided 93$ ~ £3utflaw (ciFss) 0.3 At'ea * C" Faetor 0.36 91 #2 #3 94 #5 #C #7 Time Time Intensity Q de+r. V in V nut SCorage inc. Tnc. {mi.n.} (sec.) (in.lhi'.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) . (#1*60) (A*C*#3) ((hxtf.*42) (#5--#6) 5.00 300.00 3.18 1.14 464 90.00 370 5 300 3.18 1,14 460 90 370 ifl 600 2.24 0.81 566 180 386 15 900 1.77 0.64 638 270 368 20 1200 1.45 0.52 680 360 320 25 1500 1.21 (].44 698 450 248 30 1800 1.04 0.37 712 540 172 35 2100 0.91 0.33 721 63{] 91 40 2440 0.82 0.30 739 720 19 45 2700 0.74 0.27 746 810 -64 Sfl 3004 17.68 0.24 759 946 -141 55 3300 0.64 0.23 784 990 -206 60 3600 0.+51 0.22 813 1080 -267 65 3900 0.60 0.22 864 1170 -306 70 4200 0.58 0.21 898 1260 . -362 75 4504 0.56 0.20 928 1350 -422 so 4800 0.53 0.19 935 1440 -505 85 5100 0.52 0.19 974 1530 -556 90 5400 0.50 0.18 990 1620 -630 95 5700 0.49 0.18 1423 1710 -687 100 6000 0.48 0.17 1054 1800 -745 DRAINAGE POND CALCULATIONS Requu-ed grassy swale pond stsarrage vaTume = Inzpervious Area x.5 in.l 12 in.lft = 464 cu. fL Grassy swaFe pand valume provided = 469 DRYWELL F,EC1[JIREMEN`I'S - 10 YEAR DESTGN STflRNT Maximum stoage requireci hy Bawstrting = 3$6 cu. fL Nunaber and type of DryweUs Requu-ed = 1 Sinoe 0 I)aubPe TIME OF CONCENTRATION (minutes) TC (overland) Tc (gutter) Ct = 0.15 L2= 160 Z1= 0.16 L1(A) = SU C2 = 50 N(A) = 0.4 B = a S(A) = 0.02 n = 0.016 s 0,0335 Tc (A) = 2.93 d = 0.I3 L1(H) = U Tc (gu) _ 0.9$ N(B) = a TC(A+B) = 2.93 S(B) = o Tc(tot.) = 5.00 `['e (B) = 0.0 Intensity = 3.18 • ArEas "c„ A*G A = 0.42059787 WP = 6.6074 0.26 4.40 (].234 R = 0.0637 0.42 0.30 0.126 V'= 2.71 0.00 0.00 fl TC(gu) = 0.98 0.00 0.00 D Q{est} 1.14 0.00 0.00 v 0,04 0.00 D xotding = 5.70 0.00 0.00 0 1 oI.Ql A L..omp 91C11 0.68 0.53 Q=C*I*A= 1.14 Q(est. ) = 1.14 Tc {tataT} = Tc {Qvertand} + Tc (gutter) Tc (Dverland) = Ct*(L 1 #NIS''"U. 5)10.6} Ct = 0.15 L1 = Length of [3verRand Flovv N= frictian factor of ovtrland flaw (.4 for awerage grass caver) S= average slope of vverland flow Tc (gutter) = Length (ft.)fVelocity (ft.lsec.}J60 B= Battam wiath of gutter or r3itch Area = d*B+d^212*(z1+Z2) ZI = 1fIVerSe of ciUS5 510pe C3IIe of d1tch Z2 = inverse of cross slope two of diteb d= degth of flow im gutt.er (estimate, check estimate ruith Flow) Wetted perimeter = B*d+{11sin(ata(i121))+11'sin(ata(1IZ2))) Hydraulic Radius = R= ArealWelted Peritneter Velocity = 1.4861n*R^.667*s^.5 Florv = Vel'acity*,Area n s 0.016 far asphalt s=1€rngiWdinal sPoge of gutter B[]WSTRING METgTQD (TEN YEAR STORM ❑ESIGN) PRC},TECT: V. PINES I]ETENTION BASIlh1'DESIC`rN BASIN: gASW-J REVIEWER: CrSM 1VUMBER DF DRYWELLS PR,OPQSED DATE: 10-L7ct-97 0Sirigle (type A 1 Double (type B) ~~5 ~1 T'atal Area (ca1c.) (s~ HI) 1.21 Tizne af Canc. (ca1c.) {see Hl} 6.06 P Composite "C" (calc.) (sae H1) 0.34 et Time vf Conc. (anin) 6.416 ~ Are~a (Acres) 1.21 ~ v C' Factar 0.34 Asphalt Area (sq. ~ti 4148 ' Volume Provided 352 Oufflaw (cfs) _ 1 Area * C" Factvr 0.42 #1 #2 #3 #4 #5 #6 #7 Time Tune Intensity Q dev. V in V aut Starage Inc. Inc. (min.) (sec,) (umlbr.) (cfs) (cu. ft.) (cu. ft.) (cu. ft.) (#fl*dfl) (A.*C*#3) {Qutf.*92) (#5-#6) 6.06 363.51 2.98 1.24 646 363.51 242 5 300 3.18 1.33 533 340 233 10 600 2.24 0.93 675 600 76 FS 900 1.77 0.74 756 940 -144 iD 1200 1.45 6.64 8oQ 1200 -400 25 1500 1.21 0.50 814 1500 -581 30 1800 1.04 0.43 834 1800 -966 35 2100 0.91 0.38 844 2140 -1255 40 2400 0.82 0.34 863 2400 -1537 45 2700 4.74 0.31 871 2700 -1829 50 3000 4.68 (].28 886 3000 -21 T4 - 55 3300 4.64 0.27 914 3300 -2386 60 3600 0.61 0.25 947 3600 -2653 65 3900 0.60 - 0.25 1007 3900 -2893 70 4200 0.58 (}.24 1046 4200 -3154 75 4500 0.56 4.23 108[} 4500 -3420 80 4800 0.53 0.22 1088 4800 -3712 85 5100 0.52 0.22 1133 5140 -3967 90 5400 0.50 0.21 1152 5444 -4248 95 5700 0.49 0.20 1190 5700 -4510 100 6000 0.48 4.24 1226 6000 -4774 I]RA.INACYE PQNI] CALCL]LATIDNS Required grassy swa1e porad starage volume = TmgerWiaus Area x.5 in.i 12 in.lft. = 173 cu, ft. Grassy swale pond volume pro.rided = 176 I3RYWELL REQUIRE1VIENTS - 10 YEAR I]ESICrN 5TORM Maximum storage required by Bowstring = 242 cm ft. Number and ty+pe v£DryvyeiLs Required= - [l SingYe • 1 Double TUvEE oF CoNcEN°rRATro~ (minut~) Tc (oVertana) Tc (gutter) Ct - 0.15 L2= 330 Zl= 0.16 L1(A) = 54 Z2 ~ 50 N(A) _ 04 B = 0 S(A) = 0.02 n= 0.016 ~ s = 0.41 Tc (A) = 2.93 d ~ 0.17 L1(B) = 0 Tc (gu) = 3.13 N(13) = 0 Tc(ta,+B) = 2.33 S(B) ~ D Tc(toi.) = 6.06 Tc (B) _ 0.0 Intensity = 2.98 Areas "C" A*C A = 0.70365075 WP = 8.5463 0_09 0.90 0A81 R= 0.0823 1.12 0.30 0.336 V = - 1.76 0.00 0.00 g Tc(gu) = 3.13 0.00 0.00 0 Q{est} = 1.24 0.0[l (1.0fl 0 0.00 0.40 0 Haldsng r 11.76 D.i]fl 0.00 4 Total A Comp "C" 1.21 0.34 Q=C *I*A= 1.24 Q(est. ) = 1.24 7c (tatal) = Tc (averla.nd) + Tc (gutter) Te (nverland) = Ct*(L 1 *N15"0.5 )^U.6) Ct ~0.15 L1 = Length nf C]verlaud Flow N= frictiQn factor of ovverland frlavv (.4 #'or average grass cover) S= average sIope of averLand flaw Tc (gutter) = Length (ft.)Nelocity (ft.Isec.)160 S= Bottom vvidih af gutter vr ditch tauea = d*~`3+-d^2/2*(ZI+Z2) Z 1= i.nverse of cross slape one rrf ditch Z2 = inVerse vf csoss slvpe two of ditch d= depth of flaw in gut#er (estimate, c.heck esimate with Flow) WetEed perimeter = B*d+(11sin(atn(11Z7))+lf5in(atn(11Z2))) Hydraulic Radius = R = ArealWetted FerimeCec Velocity ~ 1.4861n*R^,667*0.5 Flaw = Velacity*Area n= 0.0 16 for asphalt s= ton$itudinal ~lope af gutter Dg►4jrJ.a6E z-~OE ;ZPaQa2EM9)..►T S ~A-Sr tS A, 5wA LE A IMPERvious A ra~-A • ~ - ~~g 1'9 cUL - 0~-s0 C. ~~~4e, 7-~ ~ ` 3 I3d.~~ F~PE-fWE AD (s+,4 144+5 z 3Z0 +4 ~ `s~ „~LS.~i[l 5w A ~ AP4A RgQ' D w S:50 I z- f ~ 5wAt-c- AkeA Pgov'❑ N3.5 ` x 7-5' =4-G LS f4 ~ ~ 10+.5 Z.* Z.S ~ im I cc.~- ~ svJAr-:1E A -Z, lmPEWOOs ARGA _ Z P,ERPr,NF- RoAP (5-rA - 5w,QL-E r49,c--,4 9461V'ta ~ 34-7.0 ? 2~5 f4 ~ . . . [L • ~ vA ~ A ~ A PRod' b = !Sr'~~ c ~ ~ - Zq`f 5 z- ~4- ~a.w( Z-4 6 1 5WA+..E N 3 ImP6,zvaov--> Ajec.A ~ P6iZRr1,]F- P-P (5-rA 4 ~60'4~.S~I~Z~= IZ`+k A+IE (srA d too {'V AvE (,riA - 1400 - o +00 )(ZO)Co. 5 ) oo f4 z~ :1(v9 z f+ ~ . 6 4' ~ ~ SwAGP- AfacA REa fl ' -+4,IZ- 1L. Z-4, x Z~ + - 6+3 i~ ~ ()t /]11 vVs l.cJrb '4r,+, CZirn ; ~ n QRAI~ACsF- e-AtG.)L.4'TlrJlsls BAst~ B Sw~LiE S-l . IMPCavRau:5 afa6,q s ~gpsGsp3p - p~71Aa1tA ~~iJtS ~~~Rw& RQ/d.D `-5rT"+'~ '3'~ ~ - Gf IS!j (26) w~ ..7 T ❑ ea • 5 I.+IA LiE jqR6,a RLr-Ce'o = S $cx:) _ 463 f4 ~ I Z, ~ 5wAa.f. RF2EA t'ROV'.D = ~.4t X Z4 ~ C A+ ~ -F* P67vRn1 A X6 A ~ DRPfNJACaE ~ le -ZC.'Ns'3 " 6PLC[JP.+Iq TA0FJS ~ L3f~51T1 ~ 5w~LiE c~ i CVL-i0f~..5r4c- (f~Z)(rr)(`+S~}~ gn~~ f>C 12 Rr1,f WA 0 (STA d + 4S ~ 3 +3s 3500 ~ ~~=Y to ~ A,~~A RE&~7 = ,R8 5e~. ! Z. odle -P~ ~ ~ SG..a~ 006-A p eav.~ ~ zc,'rr Z'('o~ ~ 59 0 ~ ~ ,~'k i'~+~'s Cs~~ 6 rr°~~fn e~re~ 5WRLig C- Z ' ~ IMPgf3V6c1V5 ARiELi 13+j' IqVcNU.,-r- (ST,p 0t00 Z&,)o F4 ~ ~ SwA~ RlE p jEFGi'l~ ~ 2/,oC7 ~ Z.! ~ -F4~ .i'. 5w4zf AAE-A PRaV'a = 15' x I5 ~ Z-. ~[.ryqLE 3 1thPEitvtovs pP-E~4 13-01 p4v6r.}u~,C (57P [+3o~Z-+ -74.6o )(e~' ZB9 z- -F-{'I. CtIL-Dc .!5 Ae- ~ °t L) ~~~('~5~) V/ = 3 (8 F4 i. Ps43rC teauF?--r (STfi I +4S - 3t 3loo f4 4,o +w~ q `t 3 V 5 w ,4tF_ A,eEA RC-q' p ~ 1111-43 _ 3 I ~4L rL 5WAc-4 A".Q Ppov' o -z 3c K 3I = g~F4 (k R'11 NV5 [ur6 r-G.{Vrl\ otrcr,~ ) DipA7+JAraE z08 `REQ,IF-lEmGt-.1-rS B f15 I ~.I , SWAI-i; D C nx~gri~ IM-P69-Vi C7ti15 ~C-A' Lu L r`~wW 1~~ Av~r~►~~ ~~4~ cs~~a -«~c~(T~'~ - F4. 'V1f.'1V! 5W A L.6 A1Q`] P6Q+ 0 ° Zz0o F,+L- Z. tZ- ~ $wAC.E pPorJIDg1? 1 ZCX7 F4 ~ f / yr ~rf`S 5 CJ'n d iP ~ L7lCGL 2- w14 LE PrZ- ll"PERVIVUS AR,c.-A ~ t,jjr PPL9 A~~ (SlrA 3f 4o J 44Z3.01 9L f# I3*k Pvstru& (Sfw I+10 89 3 Z, f-+ 5WALE !4 lEfA ReQ'ct ~ d Q 5`l 4 -F+ 7'' ~ 903 f+ ' . ~ 'SwA L.L` PIZoV I p c-F] ~ -3a x 30 ;'.y Z~ ~e c, t*4-s z anJ 3 3 pRA 1n1A6r= Rc-cxj,zEm-r=+r^s'r5 BASTr.l 5 wA L-F- F - ~ ~ ' peiavious R A SI~FLJ R yr~~CGL- E7E -5Bc- ('I7-)C fT)(45) f4 z- . wrRu sfE cc- R-r (5~+~ f+ +"5- 34 4°0~(zo~ ~ ~~ff~e 4a+ci k ..4 ~ ~ fc~ S f '~4 ~ ~ neOV'o r _ x z/"' ~ 510 -Ft 7-~ ~7~ I11~N41~ Cvr'6 rC.~W7+~ ~r~,ra ~ SWAL£ E-~ fft'PieVlvus A jZ6A ' 13+~ Auc- ,J~ (z rA 7 +:*4~cc> - 4+ z-L • Z C, (,5 ~4 7-- 1-3 +J- ~~i~~UC (s-rA 4 + zz. 8 ta ~ '5 + s6,_(-,0 )(ZO' ~ - Z16. -kS ~4 -21~ +v+~ L • 56 ~ -F4 ~ Sw,qLE p f7s ° ~ 5 w.4 L.C- ~F-64 F'eov`D = Z-Z-' ~ Zz' = 4 8 $ -F4 SwAL.& E = 3 ir"p6Xr,,,av.s • CVL - q- -S A C. 'rT)(45) C: -3181 f42- GVr+~PPI.~ f7IZ. (5,rrA j ♦ 45; - 3 -F+o ) (Zo' ~ - -L - = lOE3 i F+ I-F-' SLVQL6 510 1Z- S L.,~~C- 4AGA P,eoV' o ~ 3o ' v Z 3 ' = lp (74- -F f Ot M14lV S Cl1P6 f"@+l.J!'f) arCrk ) DRAWAC~~ ~ "ZoB " Rr.0uagE11?ElJ`F5 ~w~L F- F - ~ Ij,.JPF-jaVIOUS A REA 1l~.Crrs)7 - 318 t f-f- Nw W ~ Wp ~T !l ~'0 ) ~ - ~ ~(oQ f~'L AI ,i7p~G 1°Qt7oL {ri'f'OC 144S - 4 G 3.O I 1/ a I ~ $ $ 4r! -F-+ ~ ~ . 5wR[~ A96A e EC~.`D - '~4 4 t ~ - ~Z.B~4 7-1 IZ ~ Ik,v+A L-E. Z-i! 5EPr tQ Imr'ARviov5 A~~A V/ wR+PKE ROA❑ (5-rA 4+Z3.cl - & +30)(7-0' 4 1,40 f 4 a,.= fZ#k AvEwuL (~r~ ~4 981 '1 ~ S lC5.$5 Y 20' y T 13 -P T-' ' F~-i+F l = ~SS 3 F4Z , 5 W A 4¢ ARE A J?EQ' JA = Cv a lZ~ 5LVA[.:g- A96A PRoV'D - 7CP'XZ,(-'` 5`l-0 ~f°~,~ ; T• 6* ! nru ~ ~,-~n rc~*,r~ Q~~ ~ - PRAtn]A G6 - Z08 y RE Quig~EP1LNTS 9145+ ~ H 5w ~~L- N 1 ~§10 3~~_ ~.ulJiPPt.~ p VE (STA 4#.~3.'s i - +30) (7~ ~ ~ - ~ -aiZ~~ AvErvu-e (rrt,4 3+,}°t - 6f99. 1-1 zo) -rO+ka SwALE A~&A gEd-O Z°4 5c~ f~l I Z- 1wALE g RcA ppov.'t7 s ~ 3 Zrk ~k 6+11nus r_vgB RE`TugnJ AR4,Ff ~ ~ -gwAL4c- ~ - ~ ~ pVa,uvJ (S~A 1+41~59 - 3++Cl)(2A;[-') ° 41 48. ~ AREA R60'v ~ 4t4r8 swAI-E A9Eq PRO►rD y[(o.wc ZZ S,ee- P~)JD Vor uME CAC.cUL,4IJO~[5 BRS~ n1 SwAc.iE R Z,5`)(v5` ca~p+t, ~ - Z31, ZS -F43../r 5wQr.E A-Z {t~.s' x 0.~' f~ ~Z4' xz 4` Y 1. 43' dep4lr i'a$~ E~~~ ~~~a&z +v ~a f Presv'oY - zl • zJ rrf 5 13 Ju+e.'~l ~`t P za~w VOO" 1-+z JF*3 U 1 : 5waL6 4-90 4 -b+a4 4,90 ~+3 w1 ~ +1pr, f~ d-~W e l1 rv~ 't boo, _ B'~lpj ~ 5WALiS L- I (s, )(O,sr d'rp+k 3 . ~-Z~- (ds`x )5' }Co.4cp+t, ~ - rrZ.S jr+ , ✓ ;4 'f~i'~'tlt 1 ~ Td ~ Ol = #~'J f r~ T T~ 6~! ~ "V'~ ~'F, ~ t7~ r~ SAJ C~~ -~a~~ ~ r r IOfv~ {4-3 ~ gAsr+~ ~7 5; WAL,6 J> -I cl c~+~ / a a/ ~r S1~ALE ~'6~ , JC ~L7' GI+gp t~'L q~1[y fT 3 ~ ao +-m I ,~~vvt ~4 3 Wr p~ A d~wct} de _ I DRFrj]g6E ~ FOr)D Voi-uM£ CPLCWL-A"rto,n}~ ~~~I t~ , ~5 wjQ L E [ -1 C zc.` x z~' ~Cos' 295 f+3 SWAL~ ZZ' k ZV Y Q• c~~~*k - Z4 Z -r+ 3v~ W~•~~~ ~99 s wALE ~ - 3 • ~ ~o ' ~ o' ~e p 604 fO 1~uW ~~~v' c~ - y~ ~ f~ ~ w f -4- 3 ~ swA+..C F- o d-P+k - -+50 f+ ~ Pou,d ~ -+50 4-3 wI [ +ipc~ A d~,f +l r,e$'dl F la~9 -F# 3 ~ BA~i~1 ✓ 5wp Lr-- G~- l'• ~ Zi:.' x Z(o' ~C f a' cl e-p4. S90 4.a4-a, e Pr.v'cA s 5qo t+3 4b4.x ~ r•el'd ~f 3 ✓ Swat,f- P-1 [ 37- x ~.op +0.s pva~'.A w93$ F4~ wl I 4`[pe. ra d+,Jwc4j gA~r~l ~ X ZZ' )[f.a dep+h ~ - 35L F-~ ~ +0+-a1 pmv'd = 3-5~zl 4Q4c+ 1 nc%' d ;t Z-`f Z $43 CURB DR4P CALCiJL?ieT'df3N5 A 1- 5ta 2+61 Perrine R0a3 Top af Curb ElevatFan = 2060 25 Gutter Elevation e 2059.75 "20$" Floor EIevation - 2(}59.08 +Gutter Siope = 151% Area vf Basan =2 19 acres Axea to Ir-det = 0.73 acres Percent Area = 33°/0 Affected Q [Qtotal]*(Perc.ent) q= 2.50 x 0.33 =0 825 318 d = [(nxq) 1 (0.56x Z x 4Sa) ] 318 d=(((].D14 x 0.$25 )1( 0.56 x 50 x*.4151 ) d=0.IZ Capa.ciry C ft= 0.075 ~ See Figure Ifi ) Lengrn xeq°a = 0.825 ~ 0.075 = 11.00 ft 'Lherefore; Use three (3) cwb drops at 4'-0'> A2 - Sta 4+32 Pemne Raad T'ap af Curb Elevation = 2057.86 C"sutter EImtion _ 2057.36 <`20$" Floor Elevation = 2056.69 ' C`iutter SlOpe = 1.06% Area of Basin = 2.19 acres A rea ta Inlet = 0.46 acres Percent Area = 21 % Affecced Q {Qtotal}#(Percent) q= 2 50 x0 21 = 0.525 318 d=[{nxq} 1(4.56x Z x4So) l 318 d=[(0.0 14 x 0,525 ~ f{ 4.56 x 50 x40.0105 } ~ d = 0.11 Capacrty 1ft =0. 07 { See Fagure 16 ) rengthReq°a = 0.525/0.07 = 7.50fr Therefore: Use three (3) curb drops aat 2'-6„ A3 - Sta 5+$5 Perruie Road Top vf Curb Elevation = 2056.23 .C`r~utter Elevation = 2055 73 <`208" Floar Elevation = 2054,56 Low Paint Flowr to Tn.Iet = 2.50 c.f s Capaciiy 1 ft = 4 37 ( See Figxre 17 ] Length Req'd = 2.50 ~ 0.37 = 6.75 ft T'herefore: Use three (3) curb drops at 2'_395 B i- 5ta S+SS Perrine Road Top af Curb Elevation = 2056.23 Crutter Elevation = 2055.73 "208" Floor Eievation = 2054.56 Lvw Point Flaw tQ Wet = 0.$3 c.f.s, Capacity 1#t =0.37 ( Sce Figure 17 ] Length Req'd = 0.83 1 0.37 = 2.24 ft Thereft}re: Use one (1) curb drop at 2'-3„ C T - Sta 2+95 pemne Road T"vp of Curb EleVatian = 2059.73 Gutter Elevation = 2059.23 "208" FTovr EIevanon = 2058.56 +'rutter Slope = 1.51% ~ Aaea of Sasin = 2.33 aeres Area ta Inlet = 0.84 acres percent Area = 36°/0 Affected q = (Qtotal)*(Percent) q Y2.83 x 0.36 = 1.0I9 - 3I8 d =[(nxq) e(a.56x Z x 4so) 1 318 d = [ (0 014x1019)1{0.56x 50 x 40.0151 ) d = 0.13 Capaci#y 1ft= 0,09 ( 5ee Figure 16 ) L,ength Req'd = 1 019 f 0.09 = 11 32 ft Therefore: Use dhree (3) curb d.raps at 4'-0" C2 - Sta 1+30 13th Avenue Top of Curb Elevation = 2057.36 Gutter Elevation = 2456.86 "248" Floor Etevation _ 2056.19 tarutter Slope = 1.00% Are,a vf Basin = 2.33 acres Are.a to Lnlet = 0.30 acres Percent Area _ 13% Affected Q (Qtotal)*(Percm) g= 2 33 x 0.13 =0.303 318 d = [(nxq) 1 (0 56x Z x 4SQ) ] 31$ d = [ (4.014x0.303)l(0.56x 50 x 40.0100} d = 0. 09 Capacity 1 ft = 4.46 { See Figure 16 ) I.eength Req'd =0.3413 l 0.06 = 5 45 ft Tlierefore: Usa two (2) curb clrops at 2'_9„ C3 - Sta 3+02 Robie Court Top of Curb Elevation = 2055.97 Gutter Elevation = 2055.47 "208" Floor Elevation = 2054.30 Low Point Flow to Inlet = 2.83 c.f.s. Capacity / ft= 0.37 ( See Figure 17 ) Length Req'd = 2.83 / 0.37 = 7.65 ft Therefore: Use two (2) curb drop at 4'-0" D 1- Sta 1+30 13th Avenue Top of Curb Elevation = 2057.36 Gutter Elevation = 2056.86 "208" Floor Elevation = 2056.19 Gutter Slope = 1.00% Area of Basin = 1.17 acres Area to Inlet = 0.20 acres _ Percent Area = 17% Affwted Q (Qtotal)*(Percent) q = 1.47x 0.17 = 0.250 3/8 d = [(nxq) / (0.56x Z x JSo) ] 3/8 d = [ (0.014x0.250)/(0.56x 50 x 40.0100) d = 0.08 Capacity / ft= 0.0575 ( See Figure 16 ) Length Req'd = 0.250 / 0.0575 = 435 R Therefore: Use two (2) curb drops at 21-3" ~ I]2 - Sta 4+22 t 3th Avenue Top of Curb Elevation = 2054.57 Gutter Elevation = 2{]54.07 "208" Ficor Elevation - 2052.94 Low Pvint F1ow to Wet ~ 1.47 c.f s. Capaciry J ft= 0.37 ( See Figure 17 j Length Req'd = 1 47 10 37 = 397 ft Therefore. Use one (1) curb dresp at 4' -0" E1 - Sta 3+15 13th Avenue ~ Top af Curb Elevation = 2055.52 Gutter Elevation = 2055.02 "208" Floor Elevation = 2054.35 Gutter 5lape = 1.00% Area vf Basm = 1.17 acre.s Area to Tnlet = 0.42 acres Perc,ent Area = 36°/a Affected R (Qtotal)*(Perc,ent) q = 3 06 x 0.36 = 1.102 3/s +d = [(nxq) 1 (0.56x Z x 4sv) ] 318 ~ a = 0.014 x i. 102 0.56 x 50 x 40.0 100 d =~~4 Capacity 1 ft= 0.09 { See Fxgure 16 } I..ength Rec{'d = 1.102 ! 0.09 = 12.24 ft Therefore: Use three (3) curb drnps aut 4'-3„ E2 - Sta 4+22 13th Avenue Top of Curb Elevation = 2054.57 Gutter Elevation = 2054.07 "208" Floor Elevation = 2052.90 Low Point , Area of Basin = 2.43 acres Area to Inlet = 1.55 acres Percent Area = 64% Affected Q (Qtotal)*(Percent) q = 3.06x 0.64 = 1.96 Flow to Inlet = 1.96 c.f.s. Capacity / ft= 0.37 ( See Figure 17 ) Length Req'd = 1.96 / 0.37 = 5.30 ft • Therefore: Use two (2) curb drops at 2'-9" E3 - Sta 2+87 Whipp(e Road Top of Curb Elevation = 2056.73 Gutter Elevation = 2056.23 "208" Floor Elevation = 2055.06 Low Point Area of Basin = 2.43 acres Area to Inlet = 0.87 acres Percent Area = 36% Affected Q (Qtotal)*(Percent) q=3.06x0.36= 1.10 Flow to Inlet = 1.10 c.f.s. ' Capacity / ft= 0.37 ( See Figure 17 ) Length Req'd = 1.10 / 0.37 = 2.97 ft Therefore: Use one (1) curb drop at 3'-0" F t- Sta 2+90 Whipple Raad Trop a#"Cwb EZevatian _ 2056.75 Gutter Elevation = 2056.25 "208" FIoor £lewati4n = 2055.08 Law Point, ' Flow tv InTet = 1.61 cf s. Capacity f ft= G 37 ( See Figure 17 ) LengtlY Req'd -1.61 1 0.37 = 4.35 ft Therefvre: Use two (2) curh drops at 2'-3" Cr l- Sta 5+85 VVhipple Rvad Top ofCurb Eleuafiion = 2453.6$ Gurter Elevation = 2453 18 "208" FPoor Elevation = 2452.0I Gutter Slvpe = 3.35% Area af Basin = 0.57 acres Area to Wet = 0.57 acres Percent Area = 100°Io Affectei Q ([Ztotal}*(Percent) q= 0.83 x 100 _0.s3 3/s a = [(nx q) r ~0.56 x z x 4so) ] 3i$ d = 0.014 x 0.83 ) 1 ( (].56 x 5[) x 40 0335 ) d=U.P0 Capacity 1 ft= 0.0675 (aee Figure 16 } Lengrn Req°a = 0.83/004 = 9.22 ft 'Therefore: Use three (3) curb drops at 3'-3„ Hla - 5ta 5+85 VV'hipple Roaa Top of Curb EIeVatiQn = 2053.68 Gutter Elevation = 2053.18 . "208" Flvnr Elevation = 2051 83 Gutter Slope = 3.35% Area of Basiri = 0.68 aeres Area to Uet m 0.25 acres Percent Area = 37°./Q Affected Q (Qtatal)*(Percent) q = 114x 0.37 = 0422 3J$ d = [(nxq) 1 (0.56x Z x 4So) ] 3r8 , d _ 0 014 x 0.422 ~ 1 { 0.56 x sv x 40.0335 ~ d = 0. 08 , Cagacilty 1ft _0.4525 ~ See Figure Tb ~ Length Req'd = 0.422 ! 0.0525 = 8.04 ft . TkereFore: Use three (3) curb drvps at 2'-9" Hlb - 5Ta 6+60 12th Avenue Top vf Curb Elevatton = 2453.50 ~'iutter Elevation = 2053.00 "208" FZoor EZevatiQn = 2051.83 Gutter 51ope = 1.00% Area of Basin = 0.68 acres Area to Wet = [},43 2cres Percent Area = 63% Affected Q (Qtotal)*(Percent) q= 114 x 0.63 = 4 72 318 d=[(nxq) 1{0SCx 2 x 45o} ] 318 d = L (0.014xQ.72)1(0.55x 50 x 40.0140) a = 0. 12 Capacity 1 ft= 0.417 ( See Figure 16 ~ LengLh Req'd = 4.72 I 0.07 = 10.28 ft '['Izerefore: CIse tlu-ee (3) curb drops at 3'-6" r + ~ ~ - 3+49 12TtI sS►VBIIlle Top of Gurb Eievataon = 2055 84 Gutter EIeVation = 2055.34 "208" Floor Elevation = 2[]54.17 Gutter STape = 1.04% Area of Basin = 1.21 acres Area to Znlet = 1 21 acres Percent Area = 100% Affixted Q (Qtatal)*(Percent) q = 1.24 x 1.00 = 1.24 31$ d= E(n xq) 1 40.56 x Zx 4S+o) l 318 d=[{4014x 124(0.56x 50 x 400104) d = 0.15 Capacity 1 ft= fl. l[] (See Figure 16 ) Lengih Req'd = 1.2410.10 = 12.40 ft 'Cherefore: Use th= (3) curb drops at 4,-3" - _ oEPTH oF FLOw -y -FEET vi .02 03 oa . as os ve .ro .x .3 a 5 6 .7 a.9 i.oi n f • ~ ~ " : ; ~ ~ ~ I 1 J~+ ~ . i ~ ~ i •6 ' ~ ~ -1- -T I I , -rT l .a i 4 I I ~ Tr ~ I .3 , Q n La aa .oe I ~ i ~ ~ I_~ { i~6• I 4~ ~ I I~ f 4~ os I .05 ~ ~ Tp i I I~~? i .04 b 03 ~ r .02 ' I ~ ~ i 1 f 3 ~ j~ 4 I ~ ~ ~ f ~ l l L.01 1.0 t ~ ¢ ' I (o ) ID15CHA'FaGE PER FQQT []F LENGTH DF CURB ❑'FENING + -4o INLETS WHEN INTERCEPTING 400°lo OF GUT7ER FLC}W XA~ y 3~ [b] PARTIAL 1NYERCEPTION a/'~ aa RATIa FC3R INLETS ~DF ~T %f L'ENGTH LESS THAN L a -.x "17 ~ti i ----t---L--~ / 1~ a E ~ ~ r 6 ~1 /f ~.1o .03 Ofi OB .kQ 2 3 4 3 .6 .B 1.0 L/La C,4PACITY OF Gl]RB OPENING fNL'~TS. QN CONTINUI]US -GRADE 6-39 FIGURE 16 1,4 12 8 IA I~ 4 9 8 3 sa 6 .B g 4 ' 7 ~ - LL 8 I S li ^ 7 5 F- - O z ~ _fi 0 7 ~ t cr " `r a ~q yl 10 . ~ ti.o = s 5 ~ " z 'a p:~,l~ ` z .a LU' ~ ~ ~ -.T .a v U. ~ . Q -.6 w ~ ~ ~ ~ ~ fo z L w 4 Qlsfi! a 2 - ~ p - LL. 4.9 z •3 ~ 0 -.4 y 3.3 r■ • z • . Lt1 'a ~ •~'T 4k C? - o yj .GB 0 ¢ .23 ~ 3 J F- u.. as a -.3 0 m x w c7 H ~ w 0 .G4 ~ 0 .PS 2.5 ~ w +D (L ~ - H .2 .a2- CL ~ w O U 2 a ' a a ~ o 15 . 0 t- 5 ~ Q I 4x ' L ~ 6~3.. • • -.w` . v: HT. ~ CURB m LQ. o (-LocAe. oepREssioH (4) y z . IVpMDGRAPH FC?R CAPACITY mF CLJRB QPENIRIG CNLE7s AT LDW P(]1NT5 BUREA!! OF PW$LIC RqApS p1V1'SiQM TWO, WASHOMGTpH, D.C. ~-41 ~`~►~~G TAa L- ~ Swale Nv I Road I Statson I Top of Curb ~ W1dth A-1 I Ferrine Road I 2+61 7060.75 I' 3@ 4'-0" A-2 I Ferrine Road I 4+32 2057.86 I 3@ 2'-6' A-3 Perrine Road ~ 5+$5 I 2056.23 3@ 2'-3" H-1 Pemne Road I 5+85 I 2056.23 l@ 2'-3" C-1 ~ Perrine Road I 2+95 I 2059 73 I 3@ 4'-0" C-2 ~ 13th Avenue ~ 1+30 ~ 2057.36 ~ a@ 2,_9„ C-3 I Robie Court I 3+02 ~ 205597 I 2 @ 4,-0" D-1 I 13th Avenue I 1+30 2057.36 I 2 @ 2'-3°, , D-2 - I 13th ,A,venue I 4+22 2054.57 I 1 @ 4'-0„ g-1 I 13th Avesnue ~ 3+15 I 2055.52 ~ 3@4'-3„ E-2 I 13th Avenne ~ 4+22 I 2054 57 ~ 2 la 2,-9" E-3 ~ w~~~e Road ~ 2+87 2056.73 1 @ 3,-0., F-I - ~ whiple Road C 2t90 ~ 2056.75 ~ 2 @ 2°-3- G-1 I Wtupple Road I 5+85 I 2053 68 I 3@ 3"-3» H-Ia ~ Wbgple Road I 5+85 ~ 2053.68 I 3 @ 2,_9„ *H-1b 12th AVenue I 6+60 ~ 2053.50 ~ 2@ 4'-4" , *J-E ~ 12th Avenue I 3+40 I 2055.84 ~ 3 a? 4'-0" *Indhcates 1ype 1 Sidewal& Inlet StruGtwe CiTRB T3RClF TABLE ' Sware No I Road ~ Staatian I Tap of Curh I Width A-1 I Perrane Road I 2++61 I 2060.25 3 al 4'-0" A-2 I Perrine Road I 4+32 I 2057.85 3@ 2,-6„ A-3 I Perrine Road I 5+85 _ I 2056.23 ~ 3@ 2,_3" B-1 I Perrine Road I 5+85 ~ 205623 ~ 1 t~,,t7 2"-3" C-1 I Pernne Road I 2+95 _ 2059.73 I 3@ 4,-0„ C-2 ~ 131h A►+enue I 1+30 2057.36 I 2 @ 2'-9" C-3 kobie Couurt I 3+02 I 2055.47 I 2 @ 4'-0" D-I 13th A►+enue I 1+30 I 2057.36 I 2@ 2,_3„ D-2 ~ 13f.h Avenue ~ 4+22 I 2054.57 I I@4,-0„ E-1 ~131th Avenue 3+15 I 2(}55.52 3@ 4'_3„ E-2 ~ 13th Avenue 4+22 I 2054.57 2 a7 2'-9„ E-3 I ►NTupple Road I 2+87 ~ 2056.73 I l@ 3'-0" F-Z I Whipple Road I 2+90 ~ 205675 I 2@ 2'-3" G-1 I Wtupple Road I 5+85 2053.68 I 3 @ 3°-3" H-la I WhippPe Road I 5+85 I 2053.68 I 3(~a 2'-9" *H-1b I 12th AVenue I 6+60 I 2053.50 I 2 @ 4,-G„ *d-1 ~ 12tt► Avenue I 3+40 I 2055.$4 I 3@ 4,-0„ *Iinidicaies Type I 5idewalk Inlet Suucture DRYWET,L TABLE „ . - - . . . Swa~e Nv. ~Load Nara~e Stati[5n ~ffset L#~tf fiy~ Ftim El~. .e,~.m...._....».».y.-».. .."""""e..ee.... ~ 3~C ; .."""""_.n"'._.....V«... ~ B-1 I PeTP11Ze 5+$0 ~ 32' I Ftlglt ~ A ~ 2055.23 C-3 13ih 2+35 29' Right B 2054.97 -~d..........,-•-•-~--------. ----n~e I)-~ W. 13th 4+~5 ~S' L.efl A ~U53.57 - 57 . ~ ~ - ~=2 . i3i . li 4+10 ZS' Right . B..... .,...2053 - E-3 WFiippie ~ 3+00 I 28' I Left I A I2455.73 F-I 4fihipp1e 2+80 28' Right A 2055.75 . . . . . ....d..-----. ----°-vq - P le 5 90 30 ' Right A 2050.69 ...........___PP....._.... ~ ..,..~....+,..~._.R...... v............. H-1 ►~V~t~i ~e 5~t} 3D' C.eft t~ ~DS~.Si~ J-i ~ 12rh 3+30 32! C Pugr►fi ~ B N 2054.84 Spokane C4unry Eagincers Project: VAI,LEY PINES W. 1026 Broadway Job No.: 97H466 Spokane, WA 49201 Disc.No.: 97H466 File Na►ne: I.a Ray Builders I4-dct-97 TYFICAL SECTION DATA 02:34 PM Roadway= half w7dth EIVTER--> 1$ Road iVame ENTER--> 12 TH. AVE. Left ar Right ENTER--> LEFT Curb Type T~E A ~OUNTY Station Interval ENTER--> 50 MINDNUM MAfQM4.TM Curb EL. Curb EL. Edge Pave. CEN"1 ER % SLOPE EDGE DIST, % S3,OPE EDGE DIST FROM {4.5°/m (-29`o to Gutter LINE CENTER- PAVEMENT ClI. T(~ C1L TD PAVEMEN'1' EDGE PVMT. &am EIP + FROM E1P + SELECT- [ksign Tap Curb STATI4N ELEVATION LII3E F,LEVATION FfP EDGE PAVE % 5LOPE TO CURB CUAf3 HGT} CURB Hun ED ELEV % GRADE % Grade l(}OO.04 ~ 2054.73-r - I 2654.58 N 3.00 1 -5.00 ~ - I 15.0c I 2054.411 2054.781 2054.78T •2.00 I 205.48 1050.(}0 ~ 2055.784-" 2.10 ~ 2055.73 M 3.00 I -1.67 M 2.330 1 15.44 I 2055.56 I 2455.93 I 2055.85~'. -2.53 I 2.14 1096.86 ~ 2056.194-- 0.87 N 2056.03 M 3.00 I •5.33 N 0.64 ~ 15.04 I 2055.86 I 2056.23 I, 2056.164,11 -2A7 1 0.66 1185.86 N 2056.63+~- 0.62 N 2056.48 N 3.40 I -5.00 N 0.55 ~ 15.00 1 2056.31 I 2056.68 M 2056.61 T' -247 1 0.50 1236.86 M 2056.854, 0.44 N 2056.66 7 3.00 I -6.33 N 0.36 ~ 15.00 N 2056.49 1 2056.86 M 2456.864" -2.00 I 0.50 1786.961 2056,774," -0,16 I 2056.58 I 3.00 b -6.33 I -0.16 I 15,001 2056.41 M 2056.781 2456.41•K -4.47 I -0.90 1336.96 I 2056.3541' 484 I 2056.13 I 3.00 1 -7.33 -0.90 I 15m 1 2055.96 N 2056.33 1 2056.16400' -3.13 -0,50 138b.8fi I 2055.67 ~ -1.3b I 2[155.52 I 3.00 1 -5.0(1 -1.12 I 15A0I 2055.35 N 2055.72 I ZU55.72~ -2.0(1 -0•88 1436.86 ~ 2654.47-1.4U I 205~1.82 ~ 3.0{~ I -5.40 I -1.40 N 15.00 1 2054.65 I 2055.02 I 2055.42i`. -2.04 M -1.40 N .50 ~ -0.94 ~ 2054.35 N 3.00 I -5,00 N -0.44 M 15.00 N 2034.18 I 2054.55 k 2054.55 . -2.0(1 ~ ~1.`~ 1486.86 2QS4 1536.86 ~ 2054.30,V1 -0.40 M 2054.14 N 3.00 I -5.33 N -0.42 M 15.00 N 2053.47 1 205434 1 2054.30 •2.27 N -0.50 1586.86 I 2054.12~ -0.16 N 2[~53,95 M 3.00 I -9.00 y -0.38 N 15.(10 N 205378 1 2054.15 N 205443+I' -2.67 M -[l.Sd 1636.86 I 20S4a00~ -0.44 ~ 2453.98 M 3.00 I -0.67 1 0.05 N 15.00 N 2053 81 N 2054.18 N 2053.80~.53 ~ -O.SO 1b53.4G I 2053.86 ~ -0.84 I 2053.81 I 3.00 1 -1.67 I -1.92 15.(10 M 2053 64 1 2D5~1.O1 M 1053.71 ~.00 -0.54 i743.46 I 2052.79~ •1.19 I 2a52.76 I 3.0~ ~ -La4 I -1l7 15.40 M 2052.59 1 2052.961 2052.81 -3.~ -1~ -0.88 I 2052.53 I 3.00 ~ b,04 I -4.~ ~ 15.(~0 2052.36 N 2452.73 1 2052.56~' . -3.13 M -0.50 l793,46 I 2052.35~ 1819.12 I 2052.07 ~ -0.09 I 205236 I 3.00 M 9.671 -066 I 15.00 2052.19 M 2452.56 I 2452.43~' •2.87 ~ -0.51 I M ~ ~ I ~ I I M ~ ~ I I ~ ~ I M N M ~ M M a I I 1 ~ I I I ~ ~ ~ 1 I I 9 I M j I M I I I I I I I I M ~ I I I I I I I I I i ~ I M ~ I I I I 1 I f I I OC1 1 sPOKANE coUNrv ENCiNEEa , VALLEY P__NES SUBITS10, . BAS__X MAP--, ~ ~ 4 umm RW ROBIE ROAD _ ~ I b~ Z70 S~IIIL 6-I 11E J-1 9fAl,Z $*1 .3 7~+ I Z70 I, 1 ~ . ' i - - - . 4 Z~iS [.a~y. ~ ~ _ ~ 3 I. ~ILE D-I I I ~ ~ 4qz ~ ~ - ~ ; ~ ' ~ ~ ~ I I ~ ~1m,j z~• 4ro' 8 ' - ~ j• ~I sw c-z i ~ ! s~ur e-s_ srua g=s svus r-r s+uac-t ~ 4 +o +z.' z zcye ~ sWuU,-l SnALs-e IL ! 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