International Lake Superior Board of Control

Anglers and other users of the St. Marys Rapids, please be advised that a higher than customary gate setting continues to be maintained to minimize the impacts of ongoing maintenance at Evolugen’s Clergue hydropower facility in Canada. The International Lake Superior Board of Control (Board) expects that the total St. Marys River flow will be 2,020 m3/s (71.3 tcfs) in March, which is 390 m3/s (13.8 tcfs) less than the flow prescribed by Regulation Plan 2012.

Anglers and other users of the St. Marys Rapids, please be advised that a higher than customary gate setting will be maintained this winter to minimize the impacts of ongoing maintenance at Evolugen’s Clergue hydropower facility in Canada. The gates of the Compensating Works at the head of the St. Marys Rapids will be maintained at an equivalent of two gates fully open (Gates #6 through #16 partially open 26 cm (10 in) each) in February.

Higher than customary gate setting will be maintained this winter to minimize the impacts of ongoing maintenance at the Canadian hydropower facility. The gates of the Compensating Works at the head of the St. Marys Rapids will be maintained at an equivalent of two gates fully open (Gates #6 through #16 partially open 26 cm (10 in) each) in January. A setting equivalent to one-half gate open (Gates #7 through #10 open 20 cm (8 in) each) is typically used during the winter months.

Anglers and other users of the St. Marys Rapids, please be advised that a higher than customary gate setting will be maintained this winter to minimize the impacts of ongoing maintenance at the Canadian hydropower facility. The gates of the Compensating Works at the head of the St. Marys Rapids have been set to an equivalent of two gates fully open (Gates #6 through #16 partially open 26 cm (10 in) each). A setting equivalent to one-half gate open (Gates #7 through #10 open 20 cm (8 in) each) is typically used during the winter months.

Note: Due to unforeseen scheduling conflicts, the gate adjustments will occur on November 23 and 28. It was previously reported that the initial gate movements would occur today, on November 21, but these adjustments have been postponed to November 23.

Anglers and other users of the St. Marys Rapids are advised that the gate setting of the Compensating Works structure at the head of the Rapids will be adjusted on November 21 and again on November 28, 2022.

Anglers and other users of the St. Marys Rapids, please be advised that the St. Marys Rapids flows and water levels will remain above average in November. The gate setting of the Compensating Works will remain at the current setting equivalent to approximately six gates fully open.

Anglers and other users of the St. Marys Rapids, please be advised that the St. Marys Rapids flows and water levels will remain above average in October. Some recreational trails and features in these areas will likely be flooded, and users are encouraged to use extreme caution.

As of Wednesday, September 7, the St. Marys Rapids flow is expected to be approximately 931 cubic metres per second (m3/s) (32.9 thousand cubic feet per second (tcfs)). As a result, some recreational trails and features in these areas will likely be flooded, and users are encouraged to use extreme caution.

The three Great Lakes Boards will host joint webinars in English and French on August 30 and 31, respectively from 5:30 to 6:30 pm EDT. Information shared will include current and forecast conditions within the Great Lakes basin.