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<br />1II~4 <br /> <br />The v~ 1 ues in Tab 1e I II ~7 be low reflect the fo 110wi ng assumpt ions: <br /> <br />lefs <br /> <br />i <br />, <br />, <br />I <br /> <br />o The gates in Chatfield D3fI1 ~re completely closed. <br />o The Mi S5 i on Vi ejo Sewage Tre~tFl1ent Pl d'lt in Marcy Gul ch is d i s ~ <br />ch~rging effluent to the South Pl~tte ~ short distance below Chat- <br />field Dam at its ultim~t~ projected capacity of 3 cfs. <br />o Eng 1 e\'/(lod' s munic1pa 1 water supply is being diverted above Chat~ <br />field Dam, rather than at the Petersburg Ditch. <br />o Englewood/Littleton STP is disch~rging effluent to the South <br />PI atte Ri ~~r at Its ult imate projected capacity of 47 cfs. <br />o Accordingly, 8Opereentof the estimated 58 cfs f10w in the South <br />P1 atte Ri~er at Bates Avenue (south city 1 imits of D(>nver) for <br />these low.flowconditions would consist of treated sewageefflu_ <br /> <br />TABLE III ~ 7 <br />ES TlMATES Cf FUTURE LOW~FLOW CaNOl TlONS <br />IN THE SOUTH PLATTE RIVER BETWEEN <br />CHATFIELD RESERVOIR MID UPSTREAM Cf DENVER METRO SEWAGE TREATMENT f>LANT <br /> <br />Location on River <br />Immed1ately below <br />ChatfieldDdrll <br /> <br />Probable Dry Year <br />Low Flow in South Platte River <br /> <br />Below effluent outfall <br />fromMissionViejoSTP <br />(assuming ultimate projected <br />f1owof3cfs) <br />@Colll1llbineValley <br /> <br />4 cfs <br /> <br />I <br />) <br /> <br />BCfs <br /> <br /> ent. <br />0 Other inflows '"' diversions between Chatfield 'ed 'he Denver <br /> Metro STP doe estimated b~s(>d uprlll flflliliarity with 'he str",~ <br /> system "d adjacent urbanized are~s . <br /> <br />@OxfordAvenue <br /> <br />gcfS <br /> <br />Groundwater <br />The ~ll uvi a 1 groundwater resou~ce is an irnportant "'<:onQo1\i c ~()mpon~nt Of the <br />South Pl attE! River floodpl~in. Groundwate~ h~s valliE! to th~ Denver Metro <br />region. Groundwater from the South Pl ~tte River all uvlwn provides a por- <br />tion of the water br the City of Thornt.on ~uring the SIJ1llTlf'r rnonths. This <br />same aquifer provides the water supply for the City of Brighton. South <br />1>1 atte al1u'li al well <; in the vicinity of the Fulton Ditch he~dgate h~ve <br />been proposed for use by the City of Northglenn. Theilgricultural industry <br />in tile South PI ~tte River valley depends upon wells. <br /> <br />(il Bates Avenue below <br />effluent outfall frorn <br />Englewood STP (asslJtlling <br />ultimate projected effluent <br />f10wof 47 cfs) <br /> <br />5ecfs <br /> <br />(il Fl or id a A~ enue <br /> <br />6lcfs <br /> <br />i<I Third Avenue <br /> <br />64cfs <br /> <br />@SpeerBlvd. <br /> <br />1}6cfs <br /> <br />I <br /> <br />@ Confl uence P~rk dboYe <br />Ch",rry Cre",k ~nd below <br />diversion for Farmers <br />and Gardners Ditch <br /> <br />52cfs <br /> <br />(il 19th St.r(>!!t <br /> <br />nlcfs <br /> <br />In the ~ 11 uvi a 1 ~quifer of the South PI atte Ri ver between Chatfi e ld Reser~ <br />voir and Brighton the tr~ns;ent groundw~ter st(lr~ge totals ~pproxim~tely <br />330,000 acre-feet. Approx im~tely 3G.OOC acre-feet (If th! s tot~l are in <br />transit storage hetween Chatfield Reservoir dnd the 19th Street. gaging <br />statio" in Denve~, ~nd the remaining approxim~t(>ly 300,OQO acre-feet ~re 1n <br />the ~11 Uyi al aqui fer from l'ltll Sir",,,,!. to Br;ghton. rll" l'Hh $tr""t 9a9in9 <br /> <br />!(t Frankl in Street ~bove <br />diversion for Burlington <br />Oitcl, <br /> <br />66cfs <br /> <br />@YurkSlreetbelowdiversfon <br />for Burlington Oitch <br /> <br />2 cfs <br /> <br />This estima!.<, of low flow is for pur PO Sf'S of oeneral evaluation of <br />potentfal river conditions for recreation anci"ild1ife, for r;ver <br />clear"ing dnd ..astewdter dilution, aM fu,- river maintend"ct' <br />purposes. It is not for pl <Inning of municioal w~ter suppl ie, or <br />water rights purposes. <br />