Shimen Reservoir is located in Hanzhong City, Shaanxi Province. It belongs to the middle reaches of the Baohe River. It is a large-scale reservoir with irrigation as its main purpose, giving consideration to power generation, flood control and fish culture. The reservoir dam is arched between the two mountains. The pivotal project consists of arch dam, river-bed power station, the head of the East and west main canals and the counter-regulating pond.