Eight generators taken offline here
Rainy River water levels are the highest observed in 85 years, compounding the high inflows to the basin both upstream and downstream of the Rainy Lake outlet.
The high water levels on the Rainy River and Little Fork River have backed up to the dam and are impacting the Fort Frances and Boise powerhouses.
This results in a six percent reduction of outflow from Rainy Lake.
Current Rainy Lake outflow is estimated at 981.5 cubic metres per second (34,660 cubic feet per second).
H2O’s top priority is to safely restore service to these units as soon as possible.
Meanwhile, the Boise powerhouse has 46-51 cm (18-20 inches) of water on their powerhouse floor and may shut down their generators, as well.
If Boise’s generators go offline, flows will be further reduced by 18 percent.
The Water Levels Committee regularly is monitoring conditions in the watershed and will post updates as conditions warrant.
The committee is keeping the International Joint Commission informed of the situation.
The Water Levels Committee met Saturday night to discuss options for outflows from Namakan Lake and Rainy Lake dams.
The committee determined that closing sufficient gates to reduce the flows on the Rainy River, and thus storing water on Rainy Lake to alleviate flooding downstream at the Town of Rainy River, would increase flooding upstream without necessarily improving conditions on the Rainy River.
Therefore, the dams at Namakan Lake and Rainy Lake remain fully open and passing maximum flows.
Inflows to Namakan Lake and Rainy Lake are greater than outflow capacity, however, so the lake elevations are still rising.
The latest information on lake levels, dam settings, and basin flows can be found at www.ijc.org/en_/RLWWB
For further information, call 1-800-661-5922 ext. 3.