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<br />... , <br /> <br />Flood impacts <br /> <br />At flows above 1800 cfs the structures will continue to create a hydraulic and Contain the <br />flow, but the play feature will become less significant until the structure will be overtopped. <br />When the structure is overtopped the feature will ~ot affect the tloodway and will not affect the <br />l00-year floodplain. These structures were designed a~ or below, grade and mimic the, natural <br />shape of the streambed. Tbey 40 not significantly decrease the cross-sectional area oftbe <br />streambed at their location. Nmnerous BEe-RAS models of similar strUctures in similar rivers <br />have shown that these structures do not create a' flood hazard. <br /> <br />Similar Projects <br /> <br />.~ '..-, ~. ~, . Many. Qfthe concl~ionsreached in this;~rt are based ,on past ~ences at similar <br />-project&., Similar-modificationS have been made.at a nmnber of boating parks ,including Vail~. . -.. " <br />Golden, Boulder, Gunnison ima'Salida. These existing designs verify several key claims made <br />by ~ report. <br /> <br />Primarily these courses verify the fact that these courses see increased use at increased <br />flow rates., Vail, Golden and Salida bo.st major freestyle events during peate nm-off season. <br />These evenq oflen attract thousaJ:1ds of specta~rs arid ,have a significant effect on the local <br />co~unity's economy. Tbe courses also see vastly increased traffic at higher 'levels outside of ' <br />competition dates. This traffic is attributed to ~~ and onlookers that are interested in the <br />more dynamic moves that are possible at higher flow rates. Furthermore the courses are used at <br />low flow for lower, mid-level and local boating. TheSe boa~ often sharpen their skills at,these <br />lower flows. <br /> <br />Secondly, the existing col;U'Ses verify th~ desiSn functionality. In all of these courSes the . <br />flow is diverted and CC?ntrolled to create desirable recreational in-stream features. The size, <br />power and definition,o~the features .is ~so obSCJ'Ved to increase at increased flow rates. <br /> <br />Lastly,'these courses verify the viability ofa whitewaterlboating park. Whitewater sport <br />is one of the f~ growing sports in the country and events held at similar parks have " <br />significant-effects on the-loca},economy.' ,The benetits-o-la- wbitewater/boating-park incl. Bot <br />only the increased flow of boaters to the area but an inCreased flow of tourists and spectators.. <br />These parks prpvide a natural outdoor experience for the townspeople to enjoy in a picture~ue <br />riverside environment. . <br /> <br />Conclusions <br /> <br />-12- <br />