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<br />'vater storasre facility (UppE',r Lo<:!ry DetE,ntion Pond) :Ear <br />flows intercepted by the ea~;t to \,'ee':: channel, (51 wLnirr.wn <br />improvements to Kelly Dam 'to recluce it.s hazard level, and <br />(6) croposed Stapleton Detention Pond to suppress storm <br />runoff flows crossing Stapleton F~r;~rt. <br /> <br />[:>elected Alternative <br /> <br />Alternative 3A was reconmlended .in t::-H~ Phase A report,. Based <br />upon our studies, 1:his l:'ecoTIut,enoed plan provides (1) an <br />adequate drainage outlet for the upper 'r,aten3hec.; (2) a <br />relief to the hazard levels of the existing storage struc- <br />tures; and (3) a reduction of the fj,ocd potential in the <br />downstream reaches of t,he \'Iester ly Cree,: basin. <br /> <br />Review of the Selected AltE,rnati.ve <br /> <br />1'he Report on Drainage Haster Plan fen \i',,,sterly Creek has <br />been reviewed by the Urban Drainage and I"lood Control District, <br />Ci ty and Cou.nty of Denver, City of ;~.u:cora, Omaha Dis1:ric.t <br />Corp3 of Engineers, Lowry Air Force LaSE and Stapleton <br />Airport. Several meet:ings had been. h,~lcl with associated <br />juriSdictions before the preliminary design was hegun. The <br />recommended alternative plan was gelwrally accepted by a.ll <br />j uri:;dictions. The conclusions from tho,' e meetings ,,,"re <br />impl,~mented and are summarized beloW', <br /> <br />Stap Leton Detention Pond: Al thoGqh ',ehe o:,tapletoYl De1:ention <br />Pond, as proposed in the Phase A report, provides more <br />benefits than its construct.ion and rnaint:E::nance costs,. <br />Stapleton Airport has a fu1:ure plan teo u~c e part of Uw pro- <br />posed detent.ion storag'e si1:e. A recornmerdati.on ~las initiated <br />by S~apleton Airport and agreed to by all juriSdictions to <br />reevaluate the proposed Staplet.on DetcE,nt.ion Pond by consider- <br />ing ':he followi nq criteria: <br /> <br />a. Use the natural detention capacL:,y u;:, to its waximum <br />extent possible. <br /> <br />b. Occasional flooding of vacant areas, parking lots, <br />airport aprons can be teolerated. <br /> <br />C' . Additional capacity under 8taplE,t.on ll,irport should be <br />considered. <br /> <br />d. ;\ny proposed improvement.s should not agg:l:'avat.e thE! <br />flooding situation in t.IlE! pruposcd :;tapleton Detention <br />Pond area. <br /> <br />e. Investigate the possibility of lncreasing the capacity <br />under Stapleton in existing culverts by imp]~oving inlet <br />conditions. <br /> <br />-4- <br />