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Controlling water levels
The Little Long Dam Safety Project proposes to increase the discharge capacity at eight-gate Adam Creek spillway structure located on the Little Long Reservoir in Northeastern Ontario. Located about 90 km north of Kapuskasing, the project will add four new sluice gates and make other reliability improvements to the existing Little Long, Smoky Falls and Adam Creek sluice gates.
A sluice gate works like a sliding barrier that dam operators use to control water levels and flow rates in rivers. This helps OPG regulate levels and maintain safety for Ontarians.
Improving safety, infrastructure and economies
The project will ensure extreme floodwater can safely bypass OPG’s four Lower Mattagami River stations (Little Long, Smoky Falls, Harmon and Kipling generating stations) in the event of large-scale flooding in the area. It also helps OPG comply with updated requirements established by the Province of Ontario.
“We’re working closely with local Indigenous communities including the Moose Cree First Nation, Taykwa Tagamou Nation and Metis,” says OPG project manager, Ahmad Al-Ali. “We’re also working with provincial and local governments, and other stakeholder groups to ensure we’re assessing risks in the right way, and offering the greatest long-term benefit to the community.”
The majority of the project involves heavy civil construction and provides employment and contracting opportunities during construction for Indigenous communities, residents of Kapuskasing, Smooth Rock Falls, and the surrounding Northern Ontario region. Construction is scheduled to begin in 2020 and will take approximately three years.
For further details, explore OPG’s Project Overview, which details our efforts.
The project will help protect the assets improved in 2015 through the $2.6-billion Lower Mattagami Redevelopment Project, which added generating capacity at our Little Long, Smoky Falls, Harmon and Kipling generating stations and was an important partnership with Moose Cree First Nation.
Latest update
When OPG studied the wildlife habitat, plant community, and at-risk species around Adam Creek, we found the construction of the sluiceway to have previously disturbed the habitat, but that no species were harmed.
OPG is committed to moving forward with Indigenous and local communities to assess risk, mitigate issues, and produce detailed, technical engineering plans for the area.
A detailed engineering work plan including technical specifications is also in progress.