The original function of the Shihmen Reservoir, completed in 1963, was principally irrigation. Aside from the outflow channels meant for agricultural irrigation, no others meant exclusively for supplying water to the public were built.
民國五十二年完工的石門水庫，原始功能以灌溉為主，除了農業灌溉取水道外，並未設置專用的公共給水取水道。