Upper Mattagami

Ontario Power Generation (OPG) awarded Kiewit-Alarie, a Partnership (KAP), the design-build contract for the redevelopment of the Wawaitin, Sandy Falls and Lower Sturgeon hydroelectric Generating Stations (GS), on the Upper Mattagami River and the Hound Chute GS on the Montreal River.

KAP’s bold and innovative solutions provided the best use of the water resource on behalf of OPG. The KAP proposal minimized the environmental “footprint” of the project and accordingly, the risks to the environment.

Wawaitin GS - KAP installed two Francis units with a total capacity of 15.8 megawatts (MW) in a new powerhouse on a new site located to the west of the existing plant, providing an incremental increase of 5.4 MW of power at this location.

Sandy Falls GS- KAP installed a single 5.6-MW “Saxo” unit together with a powerhouse/dam structure and integral intake, located upstream of the existing facilities, providing an incremental 2.6 MW of power at this location.

Lower Sturgeon GS - KAP installed two “Saxo” units with a total capacity of 14.6 MW, in a new powerhouse to be constructed at the existing location providing an incremental 9.3 MW of power at this site.

Hound Chute GS - KAP installed two “Saxo” units with a total capacity of 10.0 MW, in a new powerhouse to be situated to the east of the existing facility for an incremental 6.4 MW of power at this location.