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I I I I I I I I I I I I I I I I I I I 2'" rl, ":;1,.., (1 . The potential storage capability can not effectively use all of the Colorado Canal delivery system capacity of 760 cfs based on the assumption of Lake Meredith average annual releases to be approximately one-half of the Colorado Canal inflows to Lake Meredith, This assumption needs further evaluation and verification during development of preliminary water operation analysis. The Colorado CanallLake Meredith raw water delivery and storage system currently operates to meet agricultural uses and to provide storage for the purpose of exchanging water for both agricultural and municipal uses, Figure I-I summarizes the maximum (wet year) and minimum (dry year) year diversion over the last 10 years, This represents the current range of water delivery case scenarios over the last 10 years. Based on this analysis, the wet year occurred in 1997 and shows a maximum diversion occurring in June of approximately 450 cfs, The dry year occurred in 1989 and shows a maximum diversion occurring in July of200 cfs, From this graph, the wet and dry year diversions are similar from November through April with a major difference in diversion the remaining part of the year. The graph also indicates that the available canal capacity can be further utilized for other diversions without impacting current users, A possible worse case scenario of canal operations over the last 10 years was evaluated based on assuming the maximum monthly diversions for each water type, Based on this analysis, it is apparent that the majority of diversions occur during the months of April through August with a peak diversion of 1,000 cfs occurring in June, It should be noted that since 1950, Colorado Canal has diverted flow over 700 cfs for approximately 245 days and for only 120 days since 1965. URS Greiner - 5 -