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契夫约瑟夫坝位于美国华盛顿州桥港附近的哥伦比亚河上,在大古力坝下游82km处,是一座水电大坝。水库在溢流建筑物附近深约61m。该坝始建于50年代初期,以后为了抬高库水位和扩大电量生产,从70年代中期到1981年对其进行了结构修改。在库水位抬高之前,集水坑以往的入流量低于0.11m~3/s,完全处于集水坑的设计范围之内。集水坑曾建有两台0.082m~3/s的潜水泵和两台0.088m~3/s的备用涡轮泵。1982年,在库水位抬高之后,集水坑入流量立即骤增到约0.23m~3/s。到1988～
The Qifu Joseph dam is located on the Columbia River near the port of Washington, U.S.A. It is a hydroelectric dam 82km downstream of the Grand Coulee Dam. The reservoir is about 61m deep near the overflow structure. Built in the early 1950s, the dam was later reworked from mid-1970s to 1981 in order to raise the reservoir water level and expand electricity production. Prior to the elevation of the reservoir water level, the inflow to the sump was less than 0.11 m 3 / s in the past, completely within the design range of the sump. The sump has built two submersible pumps of 0.082m ~ 3 / s and two spare turbo pumps of 0.088m ~ 3 / s. In 1982, immediately after the water level of the reservoir was raised, the inflow of water from the sump increased rapidly to about 0.23 m 3 / s. To 1988 ~