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<br />or no opportunity to provide municipal and industrial water sup- <br />ply, vater quality improvement, hydroelectric pover developments, <br />commercial navir,~tjon, or irrigation. Primnry consideration was <br />r,iven to resolving the basin's flood problems and to removing the <br />risks associated with the Cherry Creek Dam and Reservoir project. <br />Recreation, erosion, and sedimentation needs of the basin vere <br />eiven secondary consideration. The folloving paragraphs briefly <br />discuss the potential solutions to the vater resources problems <br />of the Cherry Creek basin. <br /> <br />b. Flood control <br /> <br />(1) Cherry Creek Dam and Reservoir. The solutions con- <br />sidered for either reducing or eliminating the potential hazards <br />caused by the hydrologic deficiencies of the Cherry Creek Dam and <br />Reservoir included zoning, evacuation, flood proofing, diversion, <br />interbasin storage, and intrabasin storage. <br /> <br />(a) Zoning. The possibility of zoning those lands <br />\lithin the Cherry Creek Reservoir below the elevation of the <br />maximum pool vas considered as a solution for reducing losses <br />caused by flood storage. Portions of these lands are currently <br />developed as expensive residential properties. Other portions <br />are now zoned for residential and commercial use and development <br />is actively underway. Zoning of the Toll Gate Creek and Sand <br />Creek flood plsins as a possible solution to prevent damages <br />trom the operation of the Cherry '~reek Reservoir emergency <br />spillvay was also considered. These lands are also extensively <br />developed in some areas and are presently experiencing pressures <br />for additional rapid development. Because of the amount and <br />extent of the urban improvements already present in the Cherry <br />Creek Reservoir area and along Sand and Toll Gate Creeks, zoning <br />would be an impractical solution to the flood problems. Such <br />action, if implemented vithout evacuation mea.sures or flood- <br />proofing measures, vould curt,,!l only future levels of flood <br />losses vhile having little effect on the current levels of flood <br />dwnage. <br /> <br />(b) Evacuation. In order to mitie;ate damages by <br />use of evaculLtion, removal of development around the Cherry Crcek <br />Reservoir and alonr, Toll Gate and Sand Creeks downstream from the <br />Cherry Creek spillvay outlet route vould be required. Evacuation <br />of the areas around the Cherry Creek Reservoir would cost in <br />excess of mlO million under existinp, conditions of development. <br />Based on the type and nature of development planned for these <br />areas and the rapid rate at which the areas are developing, <br />evacuation operations under future conditions are estimated to <br /> <br />3087 <br /> <br />2" <br />