Lower Mattagami River - Kapuskasing, Ontario
The Lower Mattagami River Project is an investment into clean, renewable energy. It is the largest hydroelectric power generation initiative in nearly 40 years in Northern Ontario. Ontario Power Generation (OPG) selected Kiewit-Alarie, a Partnership (KAP) to administer the design-build project on the Mattagami River.
This project retired the old 52-megawatt (MW) Smoky Falls Generating Station and constructed a new 271-MW station immediately adjacent to the existing plant. In addition, a new generating unit was added to three other power generating stations along the Mattagami River: Little Long, Kipling and Harmon. In total, OPG aims to increase Ontario’s energy generation capacity by over 440 MW, enough electricity to power up to 440,000 additional homes.
The project required the excavation of 650,000 cubic metres of overburden and over 700,000 cubic metres of rock, as well as the placement of over 190,000 cubic metres of concrete over five years.