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<br />002629 <br /> <br />August 23, 2000 <br /> <br />page 4 <br /> <br />High Savery Dam <br /> <br />Depletions associated with the High Savery Dam project are expected to average 7,724 acre-feet per <br />year as given in the Record of Decision, final Environmental Impact Statement, Little Snake <br />Supplemental Irrigation Water Supply project (Department of the Army Corps of Engineers, June 5, <br />2000). Of this amount, approximately 869 acre-feet per year is attributable to evaporation from the <br />reservoir itself, leaving 6,855 acre-feet as the depletion associated with supplemental irrigation <br />practices. This project assumes no additional irrigated acres will be brought under production; it <br />provides supplemental late-season water to existing lands. Adding tbe 20,050 acre-feet of existing <br />depletion to 6,855 acre-feet due to High Savery provides a total agricultural depletion of 26,905 acre- <br />feet, or essentially a 100 percent water supply based on full CIR. Because High Savery has already had <br />a biological opinion issued, it is included in the environmental baseline under current depletions even <br />though it has yet to be constructed. <br /> <br />Other Proj eets <br /> <br />In 1995, several dikes were permitted on Muddy Creek by the Little Snake River Conservation District <br />with assistance from several state and federal agencies, including the Wyoming Water Development <br />Commission, the Bureau of Reclamation, and the Bureau of Land Management. These dikes, and the <br />impoundments behind them, are permitted for stock and wetland purposes, and have since been <br />cons tructed. <br /> <br />According to the reservoir permit maps, the three constructed impoundments have a total surface area of <br />113.5 acres, resultmg in an evaporative depletion of 284 acre-feet per year at a net evaporation rate of30 <br />inches. <br />Future Depletions <br /> <br />The projects listed below were developed in large part with input from the Little Snake River <br />Conservation District, and reflect their plans and desired ability to further develop the water resources of <br />the basin. <br /> <br />Environmental Uses <br /> <br />Additional Wetlands Construction <br /> <br />The Little Snake River Conservation District has demonstrated the desire and ability to construct <br />wetland habitat for wildlife, stock and riparian benefits. As quantified earlier, the District in the last 5 <br />years has constructed wetlands with estimated depletions amounting to almost 300 acre-feet per year. <br />Future efforts by the District are anticipated to increase the amount of wetlands by a factor of three, <br />thus creating a future depletion on the order of 1,000 acre-feet. <br /> <br />! <br />l' <br /> <br />Little Snake River Basin Small Reservoirs Project <br /> <br />A feasibility report evaluating several small reservoirs in the basin was completed by Lidstone and <br />Anderson in 1998, This report, sponsored by the Little Snake River Conservation District, looked at the <br />feasibility of constructing up to 34 small impoundments for purposes of stock watering, rangeland <br /> <br />Appendix C - Technical Memoranda from Colorado and Wyoming <br /> <br />C-8 <br />