[1] The dam is managed by the Ministry of Land, Infrastructure, Transport and Tourism.

After the Second World War, the comprehensive Ishikari River system development plan in Hokkaido was started by the Ministry of Land, Infrastructure, Transport and Tourism in parallel with the electric power generation project.

It is the only multipurpose dam for irrigation, water supply and electricity generation without Flood control aside from the Sarutani Dam located in Nara Prefecture.

In recent years, Ashibetsu Lake has become increasingly Sedimented.

Since the Ashibetsu Dam does not have a flood control mechanism, the rate of sedimentation is not an issue.