The dam is situated in the upper reaches of the Sanru River, which merges with the Nayoro River, a tributary of the Teshio River. It is a new dam completed in April 2019 in Shimokawa Town. It supports the lives of local people as a multipurpose dam for flood control and hydropower generation. The dam lake’s name Lake Shimokawa Sanru was chosen from submissions from the public.

Dam data
●River name
Sanru River of the Teshio river system
●Type
Trapezoidal CSG dam
●Height
46 m
●Crest length
350 m
●Dam functions
Flood control, maintenance of normal water flow function, provision of city water, hydropower generation

Map code: 572 886 367*18