The Iwaonai dam is a multipurpose dam that was completed in 1971. At the Iwaonai Lake Shirakaba Campsite by Lake Iwaonai, visitors can enjoy a leisurely time in a natural setting surrounded by white birch trees. Fishing, canoeing and boating can also be enjoyed on the lake.

Dam data
●River name
Teshio River of the Teshio river system
●Type
Concrete gravity dam
●Height
58.0 m
●Crest length
448.0 m
●Dam functions
Flood control, provision of irrigation, city and industrial water, hydropower generation

Map code: 572 115 490*63