Outflow from Shellmouth Reservoir increased

Published on Tuesday, 03 February 2026 06:00

Manitoba Transportation and Infrastructure’s Hydrologic Forecast Centre reports the Shellmouth Reservoir outflow was increased January 29th as part of normal operation to draw down the reservoir level in preparation for spring runoff from the upper Assiniboine River.
The current outflow is 500 cubic feet per second (cfs) and will be increased to 650 cfs today.
An additional scheduled increase to outflow will occur February 4 to 800 cfs.
The increased outflow will result in a half-foot to one-foot level increase on the Assiniboine River from Shellmouth to Brandon. The increase will diminish as the river reaches Winnipeg.
The province will continue to monitor conditions on the upper Assiniboine River as well as downstream river levels.



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