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I I I I I I I I I I I I I II I I 'I I I 3. Operation ofreallocated storage in Chatfield Reservoir to meet Denver Water's demand schedule produced the greatest average increase in Chatfield Reservoir water surface elevations (approximately 9 feet for the 20,600 acre-feet reallocated storage pool) and operation for the South Metro participants resulted in the least average increase in water surface elevations (approximately 3.5 feet for the 20,600 acre-feet pool). 4. It will be necessary for those entities that are concerned with increased reservoir water surface elevations in Chatfield Reservoir resulting from storage reallocation to carefully review the results presented in Figures l-E through l5-E herein to determine the increased frequency of higher reservoir water surface elevations. 5. During the study period, there are drought years in which there was no water available for storage in the reallocated storage pools. During these drought years, consequently, there would be no effect on reservoir water surface elevations from reallocation of storage space. 6. To further explore feasibility for Chatfield storage reallocation, the Corps should perform a detailed hydraulic analysis to determine the effects that storage reallocation would have on the flood control function of the reservoir. This analysis should also consider potential environmental and recreational impacts from increased pool size. P:\Data\GEN\CWCB\Chatfield\Report12.02\RevisedChatReportl 03\Report2-03 .doc 5