Latest flood bulletin: flood warning remains for Assiniboine River from Shellmouth Dam to Brandon

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Published on Tuesday, May 6, 2014

myWestman.ca

The latest flood bulletin by the province states that a flood warning remains for the Assiniboine River from the Shellmouth Dam to Brandon, due to high flows.

There is some flooding of low-lying land near the river.

The Little Saskatchewan River is under a high water advisory as run-off continues from the upper reaches of the watershed. The water level on the Shellmouth Reservoir has increased to 1,409.7 ft.; the summer target level is 1,402.5 ft. and the spillway is at 1,408.5 ft.

Water is flowing over the spillway and these flows will increase or decrease as the reservoir level rises and falls.

Inflows to the reservoir dropped by 380 cubic feet per second (cfs) and are approximately 8,340 cfs today. Outflows from the reservoir increased by 250 cfs and are at 6,020 cfs. Outflows include 5,270 cfs of conduit flow and 750 cfs of spillway flow.    

As of Tuesday morning, flow on the Portage Diversion increased by 2,200 cfs to 6,260 cfs and flow on the Assiniboine River downstream of the diversion remained stable at 10,020 cfs.

The operation plan for the Portage Diversion is to hold the flows on the lower Assiniboine River to approximately 10,000 cfs.

Meanwhile, a high water advisory is in place for all points along the Little Saskatchewan River, due to high flows.

In the Parkland region, Dauphin Lake is at 856.7 ft. and is rising due to high inflows.

This is above the desired level and is forecast to peak in mid-May at approximately 857 feet.

The ice remains solid at this time, and ice and wind conditions continue to be monitored.

With files from Manitoba news release