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<br />VIII. MASTER PLA."I f'ACII.mES <br /> <br />A. <br /> <br />GENERAL <br /> <br />, <br />, <br />, <br /> <br />The recommended Ma~ter Plan faeililics presented below have !>een developed at IWO levels; <br />COllCc1>tual and pre1iminary design, ThepreliminarydesignhasheenundenakenlOgcnerallyclefine <br />!hc m"'tpractical system. alignmem and COStS of drainage facilities thaI have a poICnlial for being <br />conMructed through the City'" capital improvement program (CIP) over a 20-year planning horizon. <br />These: f.ci1itiesare limiredlO the Sp'illg Gulch basin due '0 lhe limited availability of CIP funds <br />COllCeptual rceommcndations are provided fOl" systems tha! are nOt expecled t o bcconstructed through <br />!he C]P within 20 years but which should be recognized a~ nceded improvements ami could be <br />incorporated ;nto the design of minor local improvemems or proposed developments. <br /> <br />I <br /> <br />Watcr linc and sanitary sewCr map' provided by the City werc used 10 determine .ppro"imate <br />localiorn,fwaterandsewcrulilitiesalongtbeproposedalignments. Forprelj,mnarydesignpnrp<JSCs <br />ilW", assumed that lhe top ofwarer]ines are located at 4.5 feet benenth the ground surface. FIeld <br /> <br />data for depth of sewer lines was obtained (or mo.t of the preliminary dcsign alignments, and where <br />snch information was nOl obtaine<;l depth ()f sewer lines was assnmed to be 10 feet from ground <br /> <br />surfacc to top of pi pc. <br /> <br />Theprclimlnarydc,ignsprc>cntcd include main li"c sizing and alignmenl.S and do "01 illcfude inlct, <br />or local :\ewer systems or connections. It is a",umed thar rC<juircments for luch facililies will be <br />,lctermincdat lhe time of final design. The rcader is referred to the Allernali,'e, EvalualionRepon <br />for additioMl intoffilation rcgarding existing systems <br /> <br />The Inng'lerm plans of the C;ty inc1ude the removal of storm runoff from irrigation ,tructure, and <br />the development af . slOrmwater management syslcnl independem of Ifrigalion fac,lilies. Where <br />apparently feasible, lhis goal has been ;ncorpoMcd into ,he Masler Plan fttommcnded improvements, <br />However, atpregemitd"",nOlappearlhalwi,nin ,he forcsceab]e furure facilities will beconstrucled <br />10 replace the Oligarchy Diteh as a nlainr stormwater conveyance strueture. The Oligarchy Dilch ;s <br />theref"fe con,idcrcd in the Ma'ter Plan t(> be a n,lativdy permanent component of the storm drainage <br />'YS!"'11, ror,,'hcr smaller irrigation bcihtie, intbe "udy arca. ,ocha'the.\.1illand Da1liolTaylnr <br /> <br />" <br /> <br />Ditches. new facilities have been propo.'<Cd to exclude storm runoff from lhcsc ditehes, Any other <br />new stormw.ter facililies COllStructed in the study area ,hould. where pos,ib]e. be implemented to <br />scp",ate runoff from irrigation.tl"UCtures. <br /> <br />No improvements have been proposed for ,he St. Vrain Creek and Dry Creck Ba,ins, The St. Vrain <br />Ba,in i, composed of sub-basins lhat drain directly 10 51. Vrain Creek and no additional minor 'IOrm <br />SYSlemS appear to be needed al thi, lime, The Dry Creek Basin is composed of a relatively ,mall arca <br />Ihatdrains direclly away from dIe City, <br /> <br />, <br /> <br />SPRING GULCH BASIN <br /> <br />, <br /> <br />Ma'ter Planned System,. Preliminary De.igns <br />a. loomillerLake_A,hlelie f'ieldDclentionSy'tem <br />As Spring Gulch lies at Iheecmerofthceityandexperienc", themoS! promincm <br />drainage-relatcd probkm, a, pcreeived by the public. this area has been largetecl to <br />receive the majority of capital improvement investments during the upcoming years. <br />Thi" arca lies approximately between 15th Awnue at Hover Strttl and Spring Gulch <br />alllth Avenue and inc1udes the ffilIjorilyof tacilitie, lor wh,eh prehmlflary deSIgn <br />i'pr.",,,tc-u as pan of Ihi,mastc,p].n. <br /> <br />The Cily has acquired for detention pond ,iting a one-half.block parcel of land <br />locatetle.srMKimbark Street !>etwccn 101h and ]lthA,.enue,. lnthi, rep<Jrlthis <br />detention facility i,referredlOa.,theAlhleticField Detenlion(1I<:<: Orawi ns, 10 and <br />13). <br /> <br />Shown in Drawings 13 through 2] are the facilities propo,ed for the Spring Guleh <br />basin. Theeenterpieee of the system is lheeollcctor Sewer from 15th Avenue .11 <br />Cambridge Drive to Spring Gulch at ll\h Avenue. and Ihc loomiller Lake and <br />Athlelic Ficld det.nlittn facilities (",e Drawing, 13 through Iii). The proposed <br />syslem will relie,'. problem, Jssoc;al<.'d wlIll millor '\OlID noodin~ ;n the Sprin~ <br />Gulch ha.in Ihmh "f ]Oth Avenue. AI.", n""ding problem, along <Jlh and 10th <br /> <br />'" <br />