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返步桥水库位于永丰县南坑乡,距县城约七十五公里,是一座以灌溉为主,结合灌溉进行发电的综合利用工程。水库的集雨面积114平方公里,设计正常高水位344.2米,总库容2110万立米,灌田5.5万亩,发电装机容量5600千瓦。水库的挡水结构为浆砌石重力坝,坝顶高程为348米,最大坝高60米,坝顶长度156.5米,其中溢流坝长36米,溢流净宽3×10米,堰顶装3台环形闸门,每台挡水面积为10×7.3米。水库始建于1979年冬、1983年枢纽工程建成。在工程建设中曾碰到坝基中缓倾角节理发育影响大坝的稳定问
Beibi Bridge Reservoir is located in Nankeng Township of Yongfeng County, about 75 kilometers away from the county seat. It is a comprehensive utilization project that mainly uses irrigation and combines power generation with irrigation. The rainwater harvesting area of the reservoir is 114 square kilometers, with a designed normal high water level of 344.2 meters and a total storage capacity of 21.1 million cubic meters. There are 55,000 mu of irrigated fields and an installed capacity of 5600 kilowatts. The water retaining structure of the reservoir is a masonry gravity dam with a crest elevation of 348 meters and a maximum dam height of 60 meters. The crest length is 156.5 meters, of which the overflow dam is 36 meters long and the overflow net width is 3 × 10 meters. Installed three ring gates, each retaining area of 10 × 7.3 meters. Reservoir was built in the winter of 1979, completed in 1983 hub project. During the project construction, the stability of dams affected by the development of gentle dip joints in dam foundation was encountered