<br />VIII. MASTER PLA."I f'ACII.mES
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<br />A.
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<br />GENERAL
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<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.
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<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
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<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
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<br />surfacc to top of pi pc.
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<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
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<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
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<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.
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<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,
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<br />SPRING GULCH BASIN
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<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.
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<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).
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<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
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