Construction of Qinglong Town Reservoir in Bazhong Town started on 1958. Huacheng Reservoir is a medium-sized reservoir mainly for irrigation, which comprehensively utilizes the domestic water supply of urban residents and aquaculture. Rainwater storage area is 9 1.5 square kilometers, total storage capacity is 63.8 million cubic meters, and effective storage capacity is15.77 million cubic meters. The hub project consists of main dam, auxiliary dam, spillway, vent tunnel and water intakes of left and right main canals. Both the main dam and the auxiliary dam are homogeneous earth dams.