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Harmon Generating Station

Harmon Generating Station

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Harmon Generating Station

DRAINAGE BASIN: Hudson/James Bay
RIVER: Mattagami
NEAREST POPULATION CENTRE: Kapuskasing (88 km south)
IN SERVICE DATE:
UNIT 1 - June 1, 1965
UNIT 2 - Aug. 1, 1965
UNIT 3 - June 3, 2014
BUILT BY: Hydro-Electric Power Commission of Ontario
ASSET TRANSFERRED TO ONTARIO POWER GENERATION: April 1, 1999
NUMBER OF UNITS: 3
CAPACITY:  220 MW

Harmon Generating Station (GS) is located on the Mattagami River about 88 km northeast of Kapuskasing. The station’s first two units were built in the 1960s, and a third unit was added in the 2014 in partnership with the Moose Cree First Nation as part of the Lower Mattagami Project

Harmon GS is operated from OPG’s control room in Timmins, along with Little Long, Kipling and Smoky Falls generating stations. In total, the four stations have a peak capacity of 942 MW.

The Harmon station was the third of four hydro sites developed in the 1960s on the Moose River system including its tributaries – the Mattagami and Abitibi rivers.

As with the operations at all of our generating stations, OPG is considerate of the environment and other users of the waterways. Our technicians manage water levels and flows according to approved water management plans. The amount of water available for generation depends on environmental needs, minimum and maximum water level requirements, and precipitation.

Harmon GS generates clean, renewable electricity 24 hours a day, 365 days a year, and is part of OPG’s clean energy portfolio which is more than 99 per cent free of greenhouse gas and smog emissions.