News Releases

Media Bulletin - Manitoba

March 9, 2023

Province Advises Outflow from Shellmouth Reservoir to Increase

Manitoba Transportation and Infrastructure’s Hydrologic Forecast Centre advises it will increase flows from the Shellmouth Reservoir as part of the normal operation to draw down the level of the reservoir in preparation for spring run-off from the upper Assiniboine River.

Outflow from Shellmouth Dam will be increased later today to 1,000 cubic feet per second (cfs) from the current 680 cfs.

The increased release to 1,000 cfs will raise Assiniboine River water levels by one to one and a half feet between the Shellmouth Dam and Brandon. The rise in river levels due to the operation will diminish east of Brandon, causing an increase of close to half a foot as the flow increase arrives in Winnipeg in two weeks.

The province will continue to monitor conditions in the upper Assiniboine River as well as downstream river levels.

Manitoba Transportation and Infrastructure advises the public to take precautions as the rise in water levels may create unsafe conditions on the river and along the shoreline.

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