Umbata Falls Generating Station (23 MW) - Marathon: White 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.

Commercial Operation on November 12, 2008

The Umbata Falls Generating Station was developed by Innergex Group for the Begetekong Power Corporation, the general partner of Umbata Falls, Limited Partnership (UFLP).  Begetekong is majority owned by the Ojibways of the Pic River First Nation. Begetekong holds the majority of shares of UFLP, with the remainder owned by Innergex Group.

The project is located on Crown Lands.  In 1914, the Pic became a treaty reserve of its traditional inhabitants, the Ojibways of Pic River No. 50 First Nation.

The development rights for the Umbata Falls site were granted by the Minister of Natural Resources to the Ojibways of the Pic River First Nation.

Umbata Falls Generating Station is a 2-unit “run-of-the-river” hydroelectric generating facility with a nameplate capacity of 25 MW located on the White River, 30 kilometres southeast of Marathon, and approximately 330 km east of Thunder Bay, Ontario.

The facility consists of an overflow concrete dam to be built upstream of Umbata Falls on the west side of a natural island, a 14-metre long diversion canal with a 3-gated spillway, an intake structure, and a 483-metre long power tunnel to be excavated along the right bank. A 56-metre long steel penstock in the tunnel leads to a “Y” bifurcation, unit penstocks and two turbines in a surface powerhouse.

The combined rated flow for the turbines is 80 cubic metres per second with a maximum flow of 85 centimetres. The facility houses two 12.5 MW horizontal axis “SAM” Kaplan turbine units and operates under a rated net head of 32.80 metres. A 20-metre long tailrace channel returns the flow to the White River. Thirty km of existing access roads have been upgraded to access the facility from Highway 17.
The plant is connected to the existing Hydro One 115 kV circuit M2W to feed into the Ontario electricity market administered by the Independent Electricity System Operator. There is 23 kilometres of 115 kV wood pole transmission line establishing the connection from the facility to the IESO-controlled grid.

This hydroelectric generating facility will generate approximately 109,000 megawatt-hours of renewable energy per year.

Location: Marathon, Ontario
River System: White River
Nameplate Capacity: 23 MW
OPA Contracted Capacity: 23 MW
Developer: Umbata Falls LP
Begetekong Power Corporation, owned by the Ojibways of the Pic River First Nation
Innergex Group
Technology: Run-of-the-river, hydroelectric
Turbines: VA Tech
Two SAM Kaplan units
Commercial Operation Date: November 12, 2008


Innergex Group

Umbata Project Website

Ojibways of the Pic River First Nation Website

Project Contacts:

Ontario Power Authority
Media and Public Relations
T. 416-969-6307 or 
Umbata Falls LP

Renaud de Batz 
Vice President, Eastern Region - Hydroelectric Energy 
T. 450-928-2550