On Monday, June 8, Gates #9 through #12 will be lowered to a setting of 99 cm (39 in) open. Gate #16 will be raised to 20 cm (8 in) to allow sea lamprey trapping. Gate #1 will remain at its typical setting which supplies a flow of about 15 cubic meters per second (500 cubic feet per second) to the…
Engagement / Outreach
Anglers and other users of the St. Marys Rapids, please be advised that Gate #14 on the U.S. side of the Compensating Works at the head of the St. Marys Rapids will be adjusted multiple times on Tuesday, June 2, 2026, to facilitate flow measurements in the St. Marys Rapids.
Water levels of Lake Ontario and the St. Lawrence River (Lake Ontario: 75.37 metres or 247.28 feet; Pointe-Claire: 21.91 metres or 71.88 feet) remain above long-term (1960-2025) average but well below the record high for this week.
Persistent precipitation this spring has resulted in rising water levels throughout the Great Lakes-St. Lawrence River basin and flood conditions in many tributaries. Water levels in Lake Ontario have risen a total of 0.76 meters (2.50 feet) in two months.
The International Rainy-Lake of the Woods Watershed Board (IRLWWB) Water Levels Committee (Committee) will host a virtual information session on Friday, May 8, 2026, at 11:30 a.m. CT.
The gate setting of the Compensating Works at the head of the St. Marys Rapids will remain at the typical winter gate setting of one-half gate open (Gates #1 and #7 through #10 open 20 cm (8 in) each). The St. Marys Rapids flow will remain at approximately 84 cubic meters per second or 3,000 cubic…
Removal of the Lake Erie Niagara River ice boom will begin Monday, April 6, 2026.