Manitoba Water Stewardship

Rainfall for the long weekend was only in the 5-10 mm range in the watershed upstream of Shellmouth Dam. Rainfall was quite heavy on areas from Brandon eastward with up to 50 mm in some areas, most of which fell last night. Additional rainfall of 10-15 mm is expected tomorrow in the portion of the Assiniboine River upstream of Miniota. Winds at Shellmouth Reservoir are expected to be light to moderate northerly for the next few days.

A FLOOD WATCH FOR THE ASSINIBOINE RIVER FROM SHELLMOUTH TO MILLWOOD CONTINUES.

The flood watch from Shellmouth Dam to Millwood will continue until the present storm system has abated and a period of dry weather is foreseen. The water level of Shellmouth Reservoir declined slightly over the weekend and stood at 1410.20 feet this morning. The total outflow was 1600 cfs this morning of which 300 cfs was flowing through the conduit. The inflow continues to decline slowly and was 1470 cfs this morning. Since outflows now exceed inflows, the reservoir is not expected to rise further except if strong northerly winds develop during the next week or so.

The conduit flow was raised slightly from 250 cfs to 300 cfs this morning. The object for the next few weeks will be to maintain a total outflow between 1500 and 1600 cfs. This should gradually reduce the reservoir water level unless above average precipitation develops.

Red Deer Lake:

Levels of these streams continue to decline. The decline in the Saskatchewan River will continue to be very slow until the end of May. High water levels at The Pas will continue to require pumping from the Pasquia River since gravity flow cannot occur until levels decline significantly further.

This is the last report of this series for the Red Deer, Carrot and Saskatchewan River systems for the spring of 2007.

A flood sheet for the Swan River area is not available for today.