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North Eagk:viar Droirge Concept Phase <br />PREVIOUS WORK <br />The Camp Won errvisiaed Lawn Ditch fkn.s rauld rmrair separate from Eagkview Pad ad be partied over the top <br />of the #3 Ditch in o fkme. Upstroom of the fkrne a rdr would be cut ido the Nrth bode of the #3 Ditch to spill <br />excess flats from the ditch The flume roukl act ~ one of trro flat contrd spill strrrcturs prq»sed for the #3 to <br />limit dornstreann flows. The Carp Plm proposed the otfie~ spill stnrchre and chvenei be belt about 3,500 feet <br />upstrean (rest) on the #3 Ditch enter doss srciion #187 (on a line extended north from 49th Ave} <br />Once across the #3 Ditch, the combirrd Larson ord #3 flows veld be hardkd n are of tw otterrates caruidoed <br />The first dternate proposed rnnsiructian of another deterdion pond inmedately Nrth of the #3 Ditch, identified <br />re the'Nortir Eogkaeew Reiland Detation Pond'. The Regod Pad wandd have 90 oac feet of stonoge vo4rrre, <br />mare ihm double the 41 ove-feet of the Eagkview Pond (Q+e aoz-foot equds 325,829 gdkns ar one foot of <br />water covuTg one aae} A smoN clrwrd from the Regal Pad would ca^RY fkna tenth to F Sheet, across F St <br />a, a oorrcrete box other', east alag the north site of F 51 to a pout about 1,100 feet rest of 3516 Ave, then enrth <br />to the bridge undrr the roibood trodcs, and ultimately to the Rive. <br />The dteroative to this Regivd Pad and smell chamd coreistr~ of krgrr chord and aiva~Fs dl the ray to the <br />rivrr without orry new pond The Comp Plm evdrrated the cost of each dtenrative ad deternnined that the Regiaxi <br />Pad with smell cfranrd reordd be less expensive to build than the krger chard ord adva~ts <br />Plorevrr, srru the Comp Wan was tanpkted'rr 1995. lad tae n the arm has charged sigeficantly. The gravel <br />miring °PC1ota^ udv~ay na-Fh of F Street an lend owned by BrstWq Pavig Ca nos rot thm completed. It o <br />saw. The pit left by that grave! miring oPe'atpn will be rocloimed n the neon future as the grmlel stodcpiks ae <br />rornovad. The owner iderds to devekrp iro pads in the arm rich home sites odjamrt to mch. Proposed tattoos <br />for the grow) pit ponds are shover on drowig 'CCB'. <br />The existence of the grovel Pit Prods old then possible use far storm water detention nos thought to Possibly <br />reverse the ecaamics of the two ohersrAivrs evduated it the Comp Won, requiring recvaYratian of the rwrd to <br />coretroct a Regiarnl Pond just nrrth of the #3 Ditch <br />Wore by R6 Engvneers far the Eagkvier Pond show a fufree 340' keg weir to be art nto the north balk of the #3 <br />Ditch opposite the spilhrq from the pond. (Sec photo on previars pogo) That rev and the spillray weld have to be <br />armored to protect the sandy barks of the spilhray and #3 Ditch brig 100 yea storms when 900 cfs weld flat <br />out of the Eogkview Pard, ido the #3 Ditch and then avoss the ter and out into the R.egiad Pad. This proposed <br />mlution to the problem of oomeyrng 100 yea' fkxrs to the rwrth of the #3 Ditch also requiod ro-ewMntim for a <br />ember of tenures <br />• massive armoring re¢ered to protect ogoeesl erosim riarrld be expensive and ursghtly <br />the 340' ksgth of the #3 Ditch weir weld also be expensive and rrnottnoctive <br />the work could reprice rvmovd of the fair cottarwod trees m the myth boric of the #3 Ditch, <br />drstroyig rikllifc habitat and ladxope aesthetics <br />The Eagkevier Pond design report rnrrclrrded that the proposed Tbrfh Eagk:view Regiard Deterrtian Pond' would <br />require about 72 acre-feet of volume ssnce the Eagk:vier Pond was inaenzd n sixc <br />MAPPING <br />Mappig for the mrnoept phase cvahration ens taken from the City of &eeky 6eogophic Lrfarmation Systen <br />(6I5} Acrid pinto doges wee strpeinposd m topographic data showig roods, parcel 6ardaies, fenors, wafer <br />and sewer molts, ad T irtervd oarrtars. We rm tnnverses to set Beni-pesnarent axrtrol poirts (2-V2" ohminm <br />crops on #5 reba~) for rrsc n later detailed topo suxys far design and le rnnslrsrction stdvg, and nSCd those <br />control poirts to verify and cortekrte mappig irfarsnatian <br />The mrynpig and controls ore on the NAD 27 horizwRd ord NAD 29 verficd datrm. <br />Pogc 5 <br />