在美国加利福尼亚州北部费瑟河支流上有一座已建15年的老土坝,高73米,蓄水8,010万立方米,用于灌溉。坝下有一条直径6.4米的隧洞,当坝完工时,隧洞用混凝土堵塞。现设计了一座新电厂,利用此隧洞作为进水结构。工程采用的水轮机是1927年制造经过翻修的竖轴混流式机组。虽机组已造53年,但翻修的费用较低。电站将供电1.1万千瓦,在峰荷时运转。造价约1,350万美元。 A tributary of the 15-year-old dams, 73 meters high and 80,100,000 cubic meters of water, is used in the tributaries of the Fesur River in northern California to provide irrigation. Under the dam there is a 6.4 m diameter tunnel, when the dam is completed, the concrete blockage of the tunnel. Now designs a new power plant, using the tunnel as a water inlet structure. The turbine used in the project was a 1927 renovated vertical shaft Francis machine. Although the unit has been built for 53 years, the renovation cost is lower. The power station will supply 11,000 kilowatts, running at peak load. The cost of about 13.5 million US dollars.