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,;,. <ij :}: The only region that experienced more than 100% of nonnal runoff was the Cherry Creek basin in central Colorado. V. RESERVOIR ACCOMPLISHMENTS. a. Flood Damages Prevented. Flood damages prevented by Corps of Engineers and Bureau of Reclamation projects in FY92 and cumulative totals of flood damage prevented for each of the projects are summarized in Table 3. b. Recreation Usage. Visitation hours for each project for FY9l and FY92 are tabulated in Table 4. VI. RESERVOIR OPERATION. Actual operations for the past year and proposed operations through calendar year 1992 are discussed briefly in the following subsections. Individual project operation summaries are contained in Appendix 4. A tabulation of the number of cases that the exclusive flood control zones in the 35 Omaha District tributary reservoirs have been filled to 25,50,75 and 100 percent is shown on Table 5. Most of the near capacity pools occurred at the Section 7 Bureau of Reclamation projects. a. Previous Years Operation (August 1, 1991 through July 31, 1992.) (1) Corps of Engineers Lakes. All Corps' tributary projects within the Omaha District were regulated in accordance with nonnal procedures during the period covered by this report. Bear Creek, Chatfield, Cherry Creek, Papio #11, Papio #18, Pipestem, Salt Creek #4, #8, #9, #10, #14, #17 and #18 stored water in the flood storage zone or above their nonnal level at some time during the reporting period. A new low pool of record was established at Bowman Haley Dam. (a)' Bear Creek Reservoir, Colorado. During the report period, the district renewed the two temporary one year municipal and industrial water supply storage contracts for a total of 74 acre feet under Section 6 of the Flood Control Act of 1944 (Public Law 534, 78th Congress), pending development of a long-tenn contract under the Water Supply Act of 1958, as amended. A revised Memorandum of Understanding (MOU) between the Corps of Engineers and the State of Colorado was signed on June 20, 1988, superseding the previous MOU dated May 11, 1977. Under the revised MOU, the State Engineer or his representative will detennine the storage and releases necessary to satisfy downstream water rights requirements when the pool level is below elevation 5559.0 ft. MSL. This target elevation encroaches one foot into the flood storage zone and was selected to allow flexibility in targeting authorized pool levels. During the reporting period, no requests were receiyed to change to continuous gated regulation to store water per the contract. 8