Gartshore Generating Station (23 MW) - Montreal River

On January 1, 2015, the Ontario Power Authority merged with the Independent Electricity System Operator to create a new organization that combines the OPA and IESO mandates.

Please note that the information on this page is not current and will not be updated. A new format for contract data will be published soon.

The Gartshore Generating Station is a single-unit hydroelectric station located on the Montreal River. The station was built in 1958, and has an installed capacity of 23 MW at a head of 35 metres.

Located 5 km upstream from Hogg, this station is the second of four power stations along the Montreal River.

Gartshore has a single penstock. The forebay has a maximum elevation of 299.31 metres. The penstock is 4.9 metres in diameter.

Gartshore GS is connected to the existing Hydro One 115kV line at Gartshore GS, which in turn connects to MacKay TS.

This hydroelectric generating station generates approximately 99,454 MWh of renewable energy per year.

River System: Montreal River
Nameplate Capacity: 23 MW
OPA Contracted Capacity: 23 MW
Operator: Brookfield
Technology: Hydroelectric
Turbines: One Kaplan turbine
Originally Built: 1958
Coordinate: 84° 35' 0.61" W, 47° 14' 22.89" N
OPA Contract Term Commencement Date: December 1, 2009


Brookfield Renewable Energy Group

Project Contacts:

Ontario Power Authority

Media and Public Relations
T. 416-969-6307 or

Brookfield Renewable Energy Group

Zev Korman
Investor Relations and Communications
T. 416-359-1955