Located in Touwu Township, Miaoli County, Mingde Reservoir sources its water from Xindian Creek in Shitan Township. It is Taiwan's first rolled earth dam planned, designed, and constructed by local engineers. Construction began in 1965 and was completed in 1970. The reservoir has a catchment area of 61.08 km², a full water level elevation of 61 meters, and an effective storage capacity of 12.45 million cubic meters. It primarily supplies agricultural, domestic, and industrial water to the Miaoli region and serves as a multi-purpose reservoir with tourism significance.