Rio Tinto’s Diavik Diamond Mines is set to install a deep-water aerator in Yellowknife’s Frame Lake on June 4, 2024. The aerator is designed to improve the conditions to sustain aquatic life with the view of reintroducing fish into the lake in the future.
The equipment, which has been selected for its ability to perform in Northern climates, will circulate oxygen to the deepest areas of the lake to increase oxygen levels in Frame Lake during the winter months. The results will be monitored for two years before Diavik can determine whether to reintroduce fish into the lake.
The project is being managed under the Diavik mine’s Fisheries Authorization with the Department of Fisheries and Oceans Canada as the mine approaches closure in 2026.
Matt Breen, the Chief Operating Officer of Diavik, says, “Diavik values being a responsible community partner and a good environmental steward. The opportunity to help restore such an iconic spot in Yellowknife, where many of our employees and families live, work, and play, was a natural fit.”
Mayor Alty of Yellowknife states, “The introduction of the aerator into Frame Lake brings the exciting potential for fish to be reintroduced and clean up the lake. This is a great lake in the heart of our community, and we appreciate Diavik’s work to enhance the area for residents and families to enjoy.”
Frame Lake was long known as a popular boating, fishing, and swimming location in the heart of Yellowknife. Traditional knowledge suggests that the lake was used for fishing activities by the Indigenous population long before settlers arrived in the Northwest Territories.
Diavik will install the aerator and work with project proponents from the Government of Northwest Territories, federal Department of Fisheries and Oceans Canada, Wilfred Laurier university , and the University of Waterloo to monitor its impact on the local ecosystem.
The contract for installing and maintaining the aerator has been awarded to Det’on Cho Nahanni Construction Ltd. for the next two years. WSP, along with researchers from the University of Waterloo and Wilfrid Laurier University, will carry out the monitoring work.
Residents of Matonabee Street and Frame Lake Trail users are advised to expect minor disruptions on the morning of June 4th for several hours as the aerator is installed in the lake.
