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<br /> <br />". <br /> <br />PREFACE <br />The Bureau of .llecla.ma tion is preparing a report on the Rio <br />Grande Division of the San Luis Valley project. The project was <br />authorized for further investigations, exploratory and preparatcry <br />work, and commencement of construction in accordance with House <br />Document Number C$3, 76th Congress, Third Session, by the Interior <br />Apprcpriation Act of June 18. 1940 (54 Stat. 406). The San Luis <br />Valley project, located in southcentral Coloradc, is divided intc <br />three major divisions. The Conejos Division, the Closed Basin <br />Division, and the Ric. Grande Division. Plans for the last division <br />are being re-examined to recognize changes in eccnomic and othsr <br />conditions; however, the effects of this division upon the entire <br />projsct and downstream areas are also being considered. <br />A Preliminary Evaluation Report on the fish and wildlife resources <br />of the Rio Grande Division, San Luis Valley projeot, was prepared by <br />the Fish and Wildlife Service and the Colorado Game and Fish Depar1ment <br />in October 1952. Engineering features studied at that time inoluded <br />a 50.000 kilowatt power plant with a total discharge of 3.000 second- <br />feet and a 1,000 aore-foot afterbay located 5 miles below Wagon Wheel <br />Gap Dam. With the elimina tion of power as a project purpose, the <br />routed streamflows were substantially revised. as were the capaci tiee <br />and areas of the various storage pools. Maximum pool capacity, for <br />example, was reduced from 1.050,000 acre-feet to 500,000 acre-feet <br />and the average annual minimum pool from 550.800 acre-feet to 59,000 <br />acre-feet. January-March streamflows under earlier project conditions <br />would have averaged about 250 second-feet below the afterbay, as <br /> <br />contrasted with the 75 second-foot average and occasional zero flows <br /> <br />... <br /> <br />." <br /> <br />" <br /> <br />11 <br /> <br />1J.93 <br /> <br />