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<br />D <br />C) <br />t- <br />~\) <br />.., <br />." <br /> <br />01 <br /> <br />An alternative to calculating an average annual depletion value would be to provide mitigation <br />water based on actual depletion over a negotiated period such as a 5-year moving average. The <br />main issue in this approach would be determining when depletions occur: When the water is <br />stored or when the water is diverted for use. If it was determined that depletions occur when the <br />water is stored, following are extreme examples of the variability in Project depletions: <br /> <br />1959 - Total runoff of Dolores River at McPhee Darn was 34% of normal. <br /> <br />About 41 30 AF of water was available in the Dolores River for Project use. The Project diverted <br />about 25,000 A of water for use and evaporation but over 113,000 AF of water was supplied <br />from carry-over storage. Project depletioos- he Dolores River was about 12,000 AF in this year. <br /> <br />1957 - Total runoff of Dolores River at McPhee Darn was 172% of normal <br /> <br /> <br />About 380,000 AF of water was available in the Dolores River for Project use. The reservoir <br />entered 1957 with essentially 0 active storage and finished the year essentially full, so about <br />229,000 Af of water was diverted for storage in that year. The Project also delivered about 3,000 <br />AF of water for use and evaporation so in this year the Project depleted the Dolores River by <br />about 322,000 AF. <br /> <br />~f it was determined that depletions occur when the water is diverted for use the previous 3 <br />examples show that Project depletions are greater during ii.!?ryears than in ~ years because of <br />MVIC's need for Project water. 'WI- <br />