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Design Report for Canon City Whitewater Kayak and Recreation Park in the Arkansas River <br /> . a boulder and precast concrete feature that will create a wave upstream of the bike path <br /> pedestrian bridge. To have a reasonable advanced recreation experience with rodeo event <br /> potential, a minimum flow of 1,800cfs at the Nessman is required. The proposed <br /> "Flytrap"would place boulders and precast structures to create a hole feature downstream <br /> of the Bullen pedestrian bridge. It is desired to achieve advanced levels of experience <br /> because of the publicity and economic impact of festivals and competitions. Having <br /> features that attracts world-class competitors to festivals and competitions enhances the <br /> economic benefits to Canon City. Terraced banks would provide areas for spectators. <br /> Similarly having a feature that would perform during the shoulder seasons provides <br /> economic benefits. Beginner and intermediate freestyle kayakers have been another key <br /> focus for the Canon City Whitewater Kayak and Recreation Park. The features perform <br /> at beginner and intermediate levels at lower flows. Both the Flytrap and the Nessman <br /> features are designed to provide reasonable intermediate recreation experience at flows of <br /> 700cfs and thus to efficiently persist for a sufficient period of the hydrograph. Both the <br /> Flytrap and the Nessman will provide beginner freestyle kayaking experiences at 250cfs. <br /> The season of kayaking is anytime that the channel is not obstructed by ice and there is <br /> sufficient water. Typically the warm-up season is in April and May on the rising limb of <br /> the hydrograph. Advanced freestyle season is around the peak in late May and early <br /> June. As the runoff recedes the water warms and the intermediate and beginning <br /> freestyle paddlers are more active. The warmer temperatures and longer days in late <br /> summer and early fall are popular seasons for"Park and Play"whitewater destinations. <br /> • IV. Hydrology <br /> Average monthly flows were calculated from average daily flows recorded at the USGS <br /> gage station 070960000 at Canon City, and subtracting the diverted flow located below <br /> the gage and upstream of the WKRP. A period of record from 1970 to 2003 was <br /> assumed to be an adequate period to represent hydrology at the project site. Historical <br /> diversions below the USGS gage at Canon City are: The Canon City and Oil Creek <br /> ditch 10.46cfs and the 14.27cfs water right,Municipal Water Works 3.5 cfs, and the <br /> Southern Colorado Power Company 30inch pipe approximated at 5cfs. The Canon City <br /> and Oil Creek ditch diversion data was obtained from the Master Water Supply Plan for <br /> the City of Canon City (Martin and Wood Water Consultants Inc. project#488.3, 2006) <br /> for the period of record 1970-2003. Figure 1 shows the average monthly flows in cubic <br /> feet per second for the Arkansas River at the Canon City Whitewater Kayak and <br /> Recreation Park. <br /> • ellatah <br /> 3of16 <br />