Steep Rock Lake

Steep Rock Lake,

4 mi (6.4 km) long and 3 mi (4.8 km) wide, SW Ont., Canada, W of Lac des Mille Lacs. It is the site of important iron ore mining. Part of the lake was drained to facilitate the mining, and the flow of the Seine River was diverted.
References in periodicals archive ?
Before mining commenced in 1944, Steep Rock Lake was drained and the area's watershed was reconfigured with a network of dams and diversion tunnels.
Steep Rock Lake was drained during the Second World War to access the iron ore.