Osoyoos Lake in the South Okanagan region of British Columbia has hit its lowest water level in almost four decades, drawing concern as it sits approximately 30 centimeters below the usual level for this time of year. The Town of Osoyoos has taken action by temporarily closing its powerboat boat launch to prevent damage to the marina infrastructure along the shoreline. Mayor Sue McKortoff emphasized the need to protect the marina from potential harm during these low water levels to avoid costly repairs.
Situated between the border of Canada and the United States, Osoyoos Lake is governed by the U.S.-Canada Boundary Waters Treaty. Factors such as a low snowpack, mild winter, and decreased inflows have been cited as contributing to the unusually low lake levels. David Hutchinson, chair of the Canadian section of the International Osoyoos Lake Board of Control, highlighted the impact of Okanagan Lake on Osoyoos Lake’s water levels, emphasizing the interconnectedness of the two bodies of water.
The Okanagan Lake Regulation System, which includes a network of dams and structures extending into the U.S., plays a crucial role in managing the water flow to Osoyoos Lake. Hutchinson noted that the provincial dam operator has been controlling water releases to maintain Okanagan Lake’s target elevation, ensuring a sufficient water supply later in the year. While Osoyoos Lake levels have been gradually increasing, the Washington State Department of Ecology has been granted approval by the International Joint Commission to raise Osoyoos Lake’s water level, with expectations to return to normal levels by the end of the month.
Despite the challenges posed by the low water levels, Osoyoos Lake remains open to tourists for recreational activities, excluding the use of the boat launch. Mayor McKortoff advised visitors to be cautious of the water levels and potential risks, reminding them of the importance of being aware of the current conditions to prevent accidents or damage to equipment. Officials are optimistic that powerboating activities will resume on Osoyoos Lake in time for the peak summer season as water levels gradually recover.