Hydroelectric developments have resulted in the damming of the water flow at the 214 m high Daniel Johnson (Manic 5) Dam, one of the world's largest, situated 40 km south of the reservoir (1971).
Reservoirs, as discussed here, do not include any type of subsurface reservoir structure that stores water, natural gas or oil.
Smallwood Reservoir, 6527 km 2 , elev 472 m, tenth-largest freshwater body in Canada, is situated on the remote Labrador Plateau, near the Québec border. It was created in the 1960s for hydroelectric-power production by
Réservoir Gouin, 1570 km2, elev 404 m, max length 102 km, average depth 5 m, is a collection of hundreds of small lakes containing innumerable islands in south-central Québec, equidistant from Ottawa, Montréal and Québec City.