Ontario
Large hydroelectric:
- DeCew Falls 1 (Twelve Mile Creek)
- Decew Falls 2 (Twelve Mile Creek)
- Ontario Power (retired) (Niagara River)
- Sir Adam Beck 1 (Niagara River)
- Sir Adam Beck 2 (Niagara River)
- Sir Adam Beck Pump-Generating Station (Niagara River) - Currently being upgraded.
- Abitibi Canyon Generating Station (Abitibi River)
- Harmon (Mattagami River)
- Hound Chute (Montreal River)
- Indian Chute (Montreal River)
- Kipling (Mattagami River)
- Little Long (Mattagami River)
- Lower Notch (Montreal River)
- Lower Sturgeon Falls (Mattagami River)
- Matabitchuan (Montreal River)
- Otter Rapids Generating Station (Abitibi River)
- Sandy Falls (Mattagami River)
- Smoky Falls (Mattagami River)
- Wawaitin Falls (Mattagami River)
- Aguasabon (Aguasabon River)
- Alexander Falls (Nipigon River)
- Cameron Falls (Nipigon River)
- Caribou Falls (English River)
- Ear Falls (English River)
- Kakabeka Falls (Kaministiquia River)
- Manitou Falls (English River)
- Pine Portage (Nipigon River)
- Silver Falls (Dog River)
- Whitedog Falls (Winnipeg River)
- Arnprior (Madawaska River)
- Barrett Chute (Madawaska River)
- Calabogie (Madawaska River)
- Chats Falls (Ottawa River)
- Chenaux (Ottawa River)
- Des Joachims (Ottawa River)
- Mountain Chute (Madawaska River)
- Otto Holden (Ottawa River)
- R.H. Saunders (St. Lawrence River)
- Stewartville (Madawaska River)
- Baysville Dam, Baysville
Small Hydroelectric
- Auburn (Otanabee River)
- Big Chute (Severn River
- Big Eddy (Muskoka River)
- Bingham Chute (South River)
- Coniston (Wanapitei River)
- Crystal Falls (Sturgeon River)
Non hydroelectric
- Pittock Dam (Thames River)
- Fanshawe Dam (Thames River)
- Wildwood Dam (Thames River)
- Crooks' Hollow Dam (Spencer Creek, Greensville)
- Claireville Flood Control dam and reservoir, Claireville Conservation Area (Humber River (Toronto)
- G Ross Lord Park Flood Control dam and reservoir, G Lord Ross Park (Don River (Toronto)
- Milne Dam and Reservoir, Milne Park Conservation Area - Markham (Rouge River (Toronto))
Planned Upgrades or Projects (all are currently in progress):
- Umbata Falls Hydroelectric Project - Installed capacity of 23MW Q2 2008. This project in progress is a partnership of the Pic River First Nation and Innergex II Income Fund (on the White River, near Marathon).
- Island Falls Hydroelectric Project - Installed capacity of 20mW Q4 2009. Canadian Hydro Developers Inc. Location: Smooth Rock Falls.
- Glen Miller Hydroelectric Project - Innergex II Income Fund (Trenton).
Hydroelectric generation under development with Ontario Power Generation (the unit in-service dates range from 2009 to 2012):
- Little Long, Harmon, Kipling and Smoky Falls - 450MW
- Lower Sturgeon, Sandy Falls and Wawaitin - 16MW
- Mattagami Lake Dam - 5MW
Read more about this topic: List Of Dams And Reservoirs In Canada