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Sandy Falls Generating Station

Sandy Falls Generating Station

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Sandy Falls Generating Station

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DRAINAGE BASIN: Hudson/James Bay
RIVER: Mattagami
NEAREST POPULATION CENTRE: Timmins (11 km southeast)
IN SERVICE DATE: Oct. 27, 2010
ORIGINAL IN SERVICE DATE: June 1, 1911
ACQUIRED BY HYDRO-ELECTRIC POWER COMMISSION OF ONTARIO: Nov. 1, 1944
FROM: Northern Ontario Power Company
ASSET TRANSFERRED TO ONTARIO POWER GENERATION: April 1, 1999
NUMBER OF UNITS: 1
CAPACITY:  6 MW

Sandy Falls Generating Station (GS) is located on the Mattagami River about 11 km northwest of Timmins. Built in 1911 as a smaller station, it was replaced by a 6 megawatt (MW) in 2010 which now produces enough electricity to power 3,500 homes each year. The station is operated remotely from Timmins, Ontario.

The original generating station, built in the first decade of the 20th century, served Ontario for nearly 100 years before being shutdown and decommissioned in June 2008. The penstocks and other buried materials (metals) of the original station were excavated and recycled or disposed of appropriately.

Construction of the new station was part of the $300 million Upper Mattagami Hound Chute Project, which also involved redevelopment of Lower Sturgeon GS and Wawaitin GS on the Mattagami River, and Hound Chute GS on the Montreal River. All four stations were returned to service on time and on budget, providing 44 megawatts of clean, reliable hydroelectricity to Ontario. This electricity output is more than double the capacity of the original stations, while using the same amount of water.

As with the operations at all of our generating stations, OPG is considerate of the environment and other users of the waterways. Water levels and flows are managed by technicians 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.

Sandy Falls 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.