Reclamation is the largest wholesale water supplier and the second largest producer of hydroelectric power in the United States, with operations and facilities in the 17 Western States.

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Looking down relief well #5 at Jamestown Dam.  Jamestown Dam is a zoned, rolled earthfill structure with a structural height of 110 feet. The spillway is a morning-glory inlet leading to a 9.5-foot-diameter concrete conduit near the right abutment of the dam with a capacity of 2,930 cubic feet per second. The outlet works, near the left abutment of the dam, are controlled by two 5- by 6-foot high-pressure slide gates with a capacity of 2,990 cubic feet per second, and discharge into a 13.5-foot high, horseshoe-shaped concrete tunnel. The reservoir has a total storage capacity of 220,978 acre-feet from streambed to elevation 1454.0, the top of exclusive flood control, of which 185,435 acre-feet are for flood control.  http://www.usbr.gov/projects/Facility.jsp?fac_Name=Jamestown+Dam

Photo by Randy Ehlis, DKAO, U.S. Bureau ofReclamation

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