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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />gpm. It was located at the same elevation (47 feet slope-distance <br />down from the crest) and 162 feet from the spillway, or 120 feet from <br />the left abutment contact on the downstream face. The Parshall fl ume <br />in the trench at the base of the dam was flowing 0.21 feet deep, <br />corresponding to a discharge of between 35 and 40 gpm. <br /> <br />As a result of this seepage problem, the Santa r~aria Reservoir <br />Company agreed with the State Engineer's Office in 1986 to restrict <br />storage to 15,000 acre-feet (gage height 64.5 feet), until the problem <br />has been rectified. Since the reservoir can store 22,679 acre-feet <br />before spilling, this restriction represents a potential storage loss <br />of 7,679 acre-feet per year. <br /> <br />C. C1 imate Summary <br /> <br />1. Service Area <br /> <br />The water stored behind th" dam is used for irrigating crops in <br />the western portion of the San Luis Valley, mainly in Rio Grande and <br />Saguache counties. This area can be classified as arid with severe <br />winters. The average annual precipitation from approximately 40 years <br />of record is about 8.6 inches per year with over 30 percent occurring <br />during July and August. Very little precipitation occurs in June, the <br />month during which crops require moisture to germinate and begin <br />growing. Annual extremes have ranged from over 16 inches (at Del <br />Norte) to less than 4 inches (at Monte Vista). <br /> <br />1-6 <br />