News Releases

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...

Weather and water supplies to Lakes Superior and Michigan-Huron were much drier than average in January. Lake Superior water levels remain below the seasonal long-term average while Lake Michigan-Huron water levels remain above the seasonal long-term average.

The Board expects the total outflow to be 1,730 m3/s (61.1 tcfs) in January, which is as prescribed by Lake Superior Regulation Plan 2012. The gate setting at the Compensating Works will be maintained at the setting equivalent to one half gate open (Gates #7 through #10 partially open 20 cm (7.9 in)...

Lake Superior outflows continue to be set in consideration of water levels upstream and downstream. The gate setting at the Compensating Works will be maintained at the setting equivalent to one half gate open (Gates #7 through #10 partially open 20 cm (7.9 in)). There will be no change to the...

Lake Superior and Lake Michigan-Huron have both continued their seasonal declines in October. As a result of the continued drier than average weather and water supply conditions, water levels on Lake Superior remain slightly below the seasonal long-term average. Weather and water supply conditions...

Lake Superior and Lake Michigan-Huron have both continued their seasonal declines in September. As a result of the drier than average conditions, water levels on Lake Superior have gone below the seasonal long-term average for the first time since April 2014.

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 September 27, 2021. The four middle gates (Gates #7 through #10) will be closed and four gates on the US side of the structure (Gates...

As a result of the drier than average weather and water supply conditions, Lake Superior water levels have declined and have reached the seasonal long-term average for the first time since April 2014. Conditions have been wetter in the Lake Michigan-Huron basin and water levels are midway between...

(In French only) - Les conseils de régularisation des eaux des Grands Lacs de la Commission mixte internationale (CMI) vous invitent à assister à un webinaire prévu le mercredi 8 septembre de 12 h à 13 h (HAE). La séance se déroulera en français. Le Conseil international de contrôle du lac Supérieur...

The International Joint Commission (IJC) Great Lakes water levels boards invite you to attend a webinar scheduled for Friday, August 27 from 12:00 pm to 1:00 pm (EDT).

The gate setting at the Compensating Works will be maintained at the setting equivalent to one-half gate open (Gates #7 through #10 partially open 20 cm). Gate #16 will be closed on Friday, August 6 now that the sea lamprey trapping has been completed for the season. There will be no change to the...

Lake Superior and Lake Michigan-Huron water levels are above their respective long-term averages. Therefore, there is a risk of shoreline erosion, lakeshore flooding, and coastal damages.

Anglers and other users of the St. Marys Rapids are advised that Gate #16, which is the southernmost gate of the Compensating Works structure, located closest to the U.S. shoreline at the head of the rapids, will be temporarily opened beginning on Thursday, June 17th to a setting of 5 cm (2 in).

The Board expects the total outflow to be 2,280 m3/s (80.5 tcfs) in June, which is as prescribed by Lake Superior Regulation Plan 2012. Lake Superior outflows are set in consideration of the above-average levels upstream and downstream.

While Lake Superior and Lake Michigan-Huron water levels remain above their respective long-term averages, the risk of shoreline erosion, lakeshore flooding, and coastal damages remains.

While Lake Superior and Lake Michigan-Huron water levels remain above average, the risk of high-water impacts remains. Lake Superior outflows continue to be set in consideration of high levels upstream and downstream. Last month, Lake Superior declined 2 cm (0.8 in), while on average it declines 1...

The Board expects the total outflow to be 2,040 m3/s (72 tcfs) in March, which is as prescribed by Lake Superior Regulation Plan 2012. The gate setting of the control structure will be maintained at the typical winter setting equivalent to one-half gate open in March.

The Board expects the total outflow to be 2,050 m3/s (72 tcfs) in February, which is as prescribed by Lake Superior Regulation Plan 2012. The gate setting of the control structure will be maintained at the typical winter setting equivalent to one-half gate open in February.

The Board expects the total outflow to be 2,170 m3/s (77 tcfs) in January, which is as prescribed by Lake Superior Regulation Plan 2012. The gate setting of the control structure will be maintained at the typical winter setting equivalent to one-half gate open in January.

Lake Superior and Lake Michigan-Huron water levels continue to decline, but are still well above average and the risk of high-water impacts remains. Lake Superior outflows continue to be set in consideration of high levels upstream and downstream. Last month, Lake Superior declined 3 cm (1.2 in)...