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• <br />• hMrfh Eagleview Droirmge Concept Phase <br />• EA6LEVIEW POND IMPROVEMENTS <br />. filmy of the improvemerrts rernmmerded by the Comp Pkn have been hulk, erchd'vrg b 2001 a carcrete box alvat <br />• to carry flats from Epple Paris pond under 4'^ St m the Iarsorr Ditch. In 1997 a concrete box alvat for the Larswr <br />Ditch was crosfnxied viler B Street aril the Eagkview Pord was modified to detoar the Lasorr fors and storm <br />• naroff from the neighboring sub-ba.:sQr (#21 in the Canp Phn} <br />. Carstrvctim pbrs for Eagk:vier Pad hnprovements tae prepared by R6 Ergs+eers, Lrc of Darecr, CO who <br />• opted l.idsfone 6 Mderson Comp Plm hydrobgic models aril extended the modek for armdysis of the Pad <br />_~''-. - <br />- '~{ _ <br />~ _. <br />~ °, <br />.r <br />r ~.f, <br />. ~ ~' r <br />a ~F a <br />• r ( ~ ~ <br />d -J.'.t y y r ~~ f :~, . <br />.~ "' <br />O - ~ <br />'._ '.:' ~ R ~ t <br />.~- a. ~" .4 L>. "_ a Ste. _ <br />~~a r- ~~ _ <br />~~//++ -~s ~. <br />• •N ~~`,c~~ ~!`' yr, ,.~ C"'j - J ~ - i <br />3• ,"\e <br />~ +c ~~~ 5 s d a .s 3 ~ ~; a <br />...'-L ~~,.vw+ ~. S' RyS+'i^~ ~'.~ 8~,y4 d~~' ~. e' Y 04T b°J.`'~6S di `~v~'Cu1t ~ <br />• ~ ~y s ~~ k i ". ~ ~ • t+p E fiT. <br />n ~rt x { E ~ y.ry k''a~ <br />• ~ 6 ~a~~~~y" <br />_ y. 1 " <br />Eog~vrewPwwd -Looking north imltt B Syteet atLmson Ditch adtr°rt <br />The impro~ertrmts to the Eagkvier Pad achieved detmtbn of excess rraaff from storms up to and inchdary the 10 <br />ymr event. Rmoff from the 2 yea storm is completely retaerdi b the odstvrg Pad. Rvroff from the 5 and 10 <br />y~ storms rill flow through the Pond dixha~ge strtxtrae aril pipes into the #3 Ditch m the rwrth side of the <br />Pad nt peck rotes of 54 aril 90 cfs (obit feet per secmd) respectively. <br />The 100 year storm rvrwff will fbr out of Eagleview Pad through the dis<:hage stntchae aril pipes ad acru~ the <br />300' wide spilhray along the Pond's rorth bark, then doom 'vrto the #3 Ditch The rnmb'sred fbr rill reach a peak <br />rate of nearly 900 efs. Dvvg that event, the #3 Ditch will overfbr its north bards yr vremtrolkd spill'wrg to the <br />rrorf h. The high fbr rote across the spillway ad the bunks of the #3 Ditch is likely to rnLSe severe erasion of the <br />bmks. The uncontrolled spill to the rrrth would fkw. to, along, aril across F Street aril then attempt to reach the <br />historic chormel aril bridge order the L6S Railroad tracks rest of 35"' Ave m its ray to the Pordre River. <br />Potartial faihae of the #3 Ditch banks oral vrcantrolled flows north towards the Rives dying the 100 year event <br />were foreseen and accepted as a temporary ride when the Eaglevier Pond improvemads were caahrrcted since <br />budgets limited the nark that could be done. This aarart project afidrvssis this kst Ivrk "ur the droirrage path to <br />redrxe the risk of damage from the 100 year storm aril safely convey the water to the Cache La Padre River. <br />Page 3 <br />