Chaudiere No. 4 Generating Station (9.3 MW) - Ottawa: Ottawa 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.


Chaudiere #4 Generating Station is a 2-unit hydroelectric station located on the Ottawa River in Ottawa, Ontario. The powerhouse was originally built in 1900. The redeveloped station came online in 2005 and has an installed capacity of 9.3 MW at a head of 10.3 metres.

The station is run-of-river without storage capability. The station consists of concrete headworks and intake. Concrete channel conveys water to the stone powerhouse.

The footprint, including powerhouse and water conveyance, is part of a designated heritage site.

The station is connected to Hydro Ottawa’s 13.2 kV feeders TC1TL, TC2TL and TC3TL supplied from the Lisgar Transformer Station LV bus.

This hydroelectric generating station generates approximately 61,000 MWh of renewable energy per year.

Location: Ottawa
River System: Ottawa River
Nameplate Capacity: 9.3 MW
OPA Contracted Capacity: 9.3 MW
Operator: Energy Ottawa Inc.
Technology: Hydroelectric
Turbines: Two horizontal double Francis
Originally Built: 1900
Coordinate: 45° 25' 13.5" N, 75° 42' 53" W

Project Contacts:

Ontario Power Authority

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