Hydroelectricity in Canada
Canada is the world's second largest producer of hydroelectricity after China, and one of the few countries to generate the majority of its electricity from hydroelectricity (59% in 2006). In 2011, Canada consumed the equivalent of 85.2 megatonnes of oil of hydroelectricity, 10.8% of all the hydroelectricity generated in the world.
Some provinces and territories, such as British Columbia, Manitoba, Newfoundland and Labrador, Quebec and Yukon produce over 90% of their electricity from Hydro. All of the dams with large reservoirs were completed before 1990, since then most development has been run-of-the-river, both large and small. Natural Resources Canada calculates the current installed small hydro capacity is 3,400 MW, with an estimated potential of 15,000 MW.
Canada has about 75 GW of installed hydroelectric capacity, producing 392 TWh of electricity in 2013.
Over 80% of BC Hydro's installed in generating capacity is at hydroelectric installations in the Peace and Columbia river basins. The GM Shrum and Peace Canyon generating stations on the Peace River produced 29% of BC Hydro's electricity requirements. In the Columbia River Basin, Mica and Revelstoke hydroelectric plants together contributed 25%, while Kootenay Canal and Seven Mile generating stations together supplied 10%.
The remaining 25 hydroelectric generating stations supplied 14% of electricity production. BC Hydro also operates thermal power plants. The Burrard Thermal Generating Station contributes 7.5% and the remaining 14.5% of the electricity requirement was supplied by purchases and other transactions.
BC Hydro's last dam was completed in 1984, since then run-of-the-river projects with private partners have been built. Power production without reservoirs varies dramatically though the year, so older dams with large reservoirs, retain water and average out capacity. As of 2012 there were approximately 40 small hydro sites generating 750 MW. By 2014 various companies have built a total of 100 run of the river projects under 50MW. In 2014 they produced 18,000 GWh from 4,500 MW of capacity.
As of March 31, 2013, Manitoba Hydro serves a peak Manitoba electrical load of more than 4500 megawatts. Electrical supply to Manitoba customers was 21.5 terawatt-hours in fiscal 2013, with total revenue due to electricity of $1.733 billion CAD. Extraprovincial sales were at 9.1 terawatthours, with normal water flows. The company also delivered 2.05 billion cubic metres of natural gas in 2013, which contributed $573 million CAD to revenues.
Newfoundland and Labrador
Newfoundland and Labrador Hydro's installed generating capacity, 7289 megawatts (MW), 80% hydroelectric, is the fourth largest of all utility companies in Canada.
Ontario Hydro Has 40% hydroelectric, and 60% nuclear-powered facilities.
After a provincial government commitment to phase out all coal generating plants, two units at Nanticoke were shut down in fall 2010. Another two were shut down in 2011. The final four were shut down on December 31, 2013.
Hydro-Québec's extensive network of 61 hydroelectric dams have a combined capacity of 38,400 megawatts, accounting for over half of the Canadian total. Hydropower accounts for 95.73% of the supply sold by the Quebec state-owned utility. Five of Hydro-Québec's hydroelectric facilities are rated above 2,000 MW — the Manic-5, La Grande-4, La Grande-3 La Grande-2-A and Robert-Bourassa stations — while 7 others have a capacity of over 1,000 megawatts.
Inside the Robert-Bourassa generating station powerhouse, the largest in North America with an installed capacity of 5,616 MW.
The Daniel-Johnson Dam, on Quebec's Manicouagan River (1968)
The 204-MW Rapide-Blanc generating station, on Quebec's Saint-Maurice River (1934)
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