Huiqu Irrigation Project

　　The Huiqu Irrigation Project is situated in Juyuan Town, Chenggu County, at the Huiqu Irrigation Project site. It was constructed where the ?? River flows out of the mountains and into the flat plains, spanning the ?? River. The project was initiated under the advocacy of the renowned hydraulic engineer Li Yizhi and designed by the distinguished hydraulic expert Liu Zhongrui. Construction began in 1939 and was completed in 1948. The entire project consists of a dam, intake sluice, scouring sluice, and two main canals — the 28.8-kilometer East Main Canal and the 20.2-kilometer West Main Canal — as well as 216 kilometers of branch and minor canals, along with bridges, sluice gates, water control structures, ponds, reservoirs, pumping stations, and wells. The main construction involved excavating 2.339 million cubic meters of earth and stone, laying 11,700 cubic meters of stone masonry, with a total investment of 11.506 billion yuan (in fiat currency at the time). This project was the largest irrigation initiative in both Chenggu and Yang counties during the Republican era. Upon completion, it irrigated approximately 100,000 mu of farmland across the two counties. After the founding of the People’s Republic of China, the project underwent multiple rounds of maintenance, reinforcement, and upgrades in 1952, 1956, and 1964. Today, it continues to irrigate 142,500 mu of land in Chenggu and Yang counties.