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. c.Recreation. The Cherry Creek Dam. and Reservoir currently provides excellent recreational facilities for Metropolitan Denve:r:, but these facilities cannot be efficiently expanded to satisfy the area's growing recreational needs. Local interests have indicated that there is a need for a regional park development in the Franktown vicinity and, therefore, consideration of recreational development in the Cherry Creek basin centered at the Castlewood Dam and Reservoir site. Because of its historic and scenic attributes, the Castlewood Dam and Reservoir site offers unique recreational opportunities unavailable in other areas of the Cherry Creek basin. The Cherry Creek channel right- of-way downstream from the Cherry Creek Dam is currently used for hiking, horseback riding, and cycling. Construction of channel improvements would permit expanding the use of the right-of-way for these activities. d. Erosion and sedimentation. The Castlewood Dam and Reservoir would reduce the erosion problems along Cherry Creek between Franktown and the Cherry Creek Reservoir. Land treatment measures and floodwater detention structures along tributary watercourses between Franktown and the Cherry Creek Reservoir would reduce the remaining erosion problems in the reach. Improvement of the Cherry Creek channel between the Cherry Creek Dam and the South Platte River would virtually eliminate the erosion problems along that reach of Cherry Creek. e. Summary. Potential solutions to the Cherry Creek basin's flood problems were developed and analy~ed for the Cherry Creek Reservoir project, for the areas upstream from the project, and for the areas downstream from the project. It was determined that ~oning would be a possible and practical solution in the undeveloped reaches upstream from the Cherry Creek Reservoir, but within the reservoir and along Cherry, Toll Gate, and Sand Creeks downstream from the dam and from the emergency spillway, the extensiveness of existing development precludes ~oning as a practical solution. Evacuation of the Cherry Creek Reservoir area would be an effective method of eliminating a part of the ha~ards associated with the project, but the high costs and social drawbacks involved in evacuation make this solution undesirable. The flood proofing measures were determined to be too expensive and their application too complex to be considered seriously as a means of reducing flood damages and risks. At the Cherry Creek Reservoir and in the areas upstream from the reservoir, channel enlargement or diversion would be too costly and impractical; however, for the downstream areas along.Cherry Creek, channel improvement works could be efficiently installed. Because of 30 .