News Releases

The Board expects the total St. Marys River flow in March to be 1,610 cubic meters per second (56,900 cfs), as prescribed by Regulation Plan 2012. Actual hour-to-hour and day-to-day flows may vary depending on hydrologic conditions, as well as variations in flow from the hydropower plants.

Water levels in each of the Great Lakes, except for Lake Erie, are currently below long-term monthly averages. Actual spring and summer water levels will depend primarily on weather and water supplies during the spring and summer months.

The gate setting of the Compensating Works will be maintained at the typical winter gate setting (Gate #1 and Gates #7 through #10 open 20 cm each) equivalent to approximately one-half gate open. The Board expects the total St. Marys River flow in February to be 1,690 cubic meters per second (59,700...

The Board expects the total St. Marys River flow in January to be 1,790 cubic meters per second (63,200 cfs), as prescribed by Regulation Plan 2012. Actual hour-to-hour and day-to-day flows may vary depending on hydrologic conditions, as well as variations in flow from the hydropower plants. Note...

The gate setting of the Compensating Works will be maintained at the typical winter gate setting (Gates #7 through #10 open 20 cm each) equivalent to approximately one-half gate fully open. The Board expects the total St. Marys River flow in December to be 1,900 cubic meters per second (67,100 cfs)...

Anglers and other users of the St. Marys Rapids need to be cautious of the flows and water levels that will be experienced in the rapids in November. The gate setting of the Compensating Works will be decreased from the current setting equivalent to approximately one gate fully open to the typical...

The International Lake Superior Board of Control will host a virtual public meeting Tuesday, November 12, from 6:00 pm to 7:00 pm.

Friday, October 11, Gates #9 through #13 will each be lowered to 38 cm open and Gates #14 and #15 will be closed.

Anglers and other users of the St. Marys Rapids need to be cautious of the flows and water levels that will be experienced in the rapids in October. The gate setting of the Compensating Works will be decreased from the current setting equivalent to approximately three gates fully open (Gates #7...

Anglers and other users of the St. Marys Rapids need to be cautious of the flows and water levels that will be experienced in the rapids in September. On Monday, September 9, the gate setting of the Compensating Works will be decreased from the current setting equivalent to approximately four gates...

On Wednesday, August 7, Gates #7 through #15 will be lowered to a setting of 97 cm open, and Gate #16 will be closed. The St. Marys Rapids flow will decrease from approximately 850 to 640 cubic metres per second. The average St. Marys Rapids flow in August is expected to be approximately 684 cubic...

Anglers and other users of the St. Marys Rapids need to be cautious of the increasing flows and water levels that will be experienced in the rapids in July. The gate setting of the Compensating Works will be increased from the current setting equivalent to four gates fully open (Gates #7 through #14...

Anglers and other users of the St. Marys Rapids, please be advised that the gates of the Compensating Works at the head of the St. Marys Rapids will be adjusted multiple times in the next 11 days to facilitate underwater inspections of the International Bridge piers. Please take extra caution when...

Anglers and other users of the St. Marys Rapids need to be cautious of the changing flows and water levels that will be experienced in the rapids in June. The Board expects the total St. Marys River flow in June to be 2,070 m3/s (73,100 cfs), as prescribed by Regulation Plan 2012. Actual hour-to...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be increased on May 6 from a setting equivalent to approximately one-half gate fully open (Gates #7 through #10 open 20 cm (7.9 in)) to a setting equivalent to approximately three gates fully open, to meet the Plan...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be maintained in April at a setting equivalent to approximately one-half gate fully open (Gates #7 through #10 open 20 cm (7.9 in)) and Gate #1 at its typical setting of 20 cm (7.9 in) open. St. Marys Rapids flow...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be maintained in March at a setting equivalent to approximately one-half gate fully open (Gates #7 through #10 open 20 cm (7.9 in)) and Gate #1 at its typical setting of 20 cm (7.9 in) open. St. Marys Rapids flow...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be maintained in February at a setting equivalent to approximately one-half gate fully open (Gates #7 through #10 open 20 cm (7.9 in)) and Gate #1 at its typical setting of 20 cm (7.9 in) open. St. Marys Rapids flow...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be maintained in January at a setting equivalent to approximately one-half gate fully open (Gates #7 through #10 open 20 cm (7.9 in)) and Gate #1 at its typical setting of 20 cm (7.9 in) open. St. Marys Rapids flow...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be lowered in December to a setting equivalent to approximately one-half gate fully open. After the gate adjustments on Wednesday, December 6, the St. Marys Rapids flow will be approximately 96 m3/s.

The International Lake Superior Board of Control will host a virtual meeting to give an update on operations on the St. Marys Rapids and Regulation Plan 2012. The meeting will be Tuesday, December 12, from 5:30 pm to 6:30 pm.

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be lowered in November to a setting equivalent to approximately one gate fully open. After the gate adjustments on Monday, November 6 (U.S. gates) and Tuesday, November 7 (Canadian gates), the St. Marys Rapids flow...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be lowered in October to approximately four gates fully open. After the gate adjustments on Friday, October 6 (American gates), and Tuesday, October 10 (Canadian gates), the St. Marys Rapids flow will be...

Anglers and other users of the St. Marys Rapids, please be advised that testing of Gate #5 of the Compensating Works will be conducted on Tuesday, September 19. Gate #5 is located on the Canadian side of the structure, as highlighted in the figure. There will be a temporary increase in St. Marys...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be maintained at the current setting in September, which is equivalent to approximately five gates fully open. The St. Marys Rapids flow is approximately 773 m3/s. At this flow, some low-lying areas of Whitefish...

The gate setting of the Compensating Works at the head of the St. Marys Rapids will be maintained at the current setting in August, which is equivalent to approximately five gates fully open. The St. Marys Rapids flow is approximately 784 m3/s. At this flow, some low-lying areas of Whitefish Island...

On Wednesday, the flow through the St. Marys Rapids will decrease from approximately 1,200 m3/s (42,380 cfs) to 780 m3/s (27,500 cfs). The gate setting will be equivalent to approximately five gates fully open. At this flow, some low-lying areas of Whitefish Island including recreational trails may...

The St. Marys Rapids flow will remain at approximately 1,200 m3/s for the month of July. Low-lying areas of Whitefish Island including recreational trails are currently flooded and portions of the Island have been closed by Batchewana First Nation. Users are encouraged to use extreme caution.

Anglers and other users of the St. Marys Rapids, please be advised that the gate setting of the Compensating Works at the head of the St. Marys Rapids will be maintained at the current setting equivalent to approximately eight gates fully open. Low-lying areas of Whitefish Island including...

The United States Army Corps of Engineers will be performing an inspection on the gates of the Compensating Works at the head of the St. Marys Rapids on Tuesday, May 23, 2023.

Anglers and other users of the St. Marys Rapids, please be advised that the gate setting of the Compensating Works at the head of the St. Marys Rapids will be increased on Monday May 8, 2023, from the current setting equivalent to approximately five gates fully open to a setting equivalent to...

Anglers and other users of the St. Marys Rapids, please be advised that the gates of the Compensating Works at the head of the St. Marys Rapids will be adjusted on Monday April 24, 2023. Gates #6 through #16 will each be raised to a setting of 94 cm (37 in.), which is equivalent to approximately...

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.

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...

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...

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...

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...

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...

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.

As of Friday, August 5, the St. Marys Rapids flow is expected to be approximately 923 cubic meters per second (m3/s) (32.6 thousand cubic feet per second (tcfs)). At these flows, some flooding of low-lying areas including recreation trails on Whitefish Island is expected, and everyone is encouraged...

Anglers and other users of the St. Marys Rapids, please be advised that the St. Marys Rapids flows and water levels will increase in July. As of Wednesday July 6, the St. Marys Rapids flow is expected to be approximately 786 cubic meters per second (m 3 /s) (27.8 thousand cubic feet per second (tcfs...

Anglers and other users of the St. Marys Rapids, please be advised of the increased flows and water levels that will be experienced in the Rapids in June. After the Compensating Works gate movements scheduled for Monday June 6, the St. Marys Rapids flow is expected to be approximately 720 cubic...

Anglers and other users of the St. Marys Rapids are advised that on Wednesday morning, May 11, 2022, Gates #9 through #12 will be raised from their current position to a setting of 33 cm (13 in) open for the remainder of the month. Gates #7 and #8 will remain at their current setting of 20 cm (8 in)...

Outflows from Lake Superior and into Lake Michigan-Huron continue to be set in consideration of water levels upstream and downstream. The Board expects the total outflow to be 1,910 m3/s (67 tcfs) in May, which is as prescribed by Lake Superior Regulation Plan 2012. The gate setting at the...

Lake Superior water levels remain below the seasonal long-term average while Lake Michigan-Huron water levels remain above the seasonal long-term average. Lake Superior outflows continue to be set in consideration of water levels upstream and downstream.

Lake Superior and Lake Michigan-Huron water levels are near their seasonal low point and depending on weather and water supply conditions could begin their seasonal spring rise over the coming weeks. The gate setting at the Compensating Works will be maintained at the setting equivalent to one-half...