Lake Manitoba update: Sept. 24, 2017

Heavy rains this week have arrested the decline in the level of Lake Manitoba. The lake has risen to 812.76 feet, more than a quarter foot above the top end of the operating range. Outflow at Fairford is 9,111 cfs this while inflow from the Waterhen is 8,264 cfs. Flow on the Waterhen remains more than double its average for this time of year. That is because the level of Lake Winnipegosis remains above its long term average level, currently sitting at 833.23 feet: that is 2.6 feet above its long term mean level. The level of Lake St. Martin is unchanged this week at 802.30 feet. The Whitemud River is springing back to life in the rain and flow on it has risen to 85 cfs. Flow on the Assiniboine is also rising and is now 989 cfs at Holland and 1,165 cfs at Headingly.

River update
Time: 9:00 AM September 24, 2017
Portage Diversion: closed
Assiniboine at Holland: 989 cfs
Assiniboine at Headingly: 1,165 cfs
Waterhen: 8,264 cfs
Whitemud: 85 cfs
Fairford: 9,111 cfs
Lake update
Time: 9:00 AM September 24, 2017
Steep Rock: 812.57 ft
Westbourne: 812.96 ft
Mean level Lake Manitoba: 812.76 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.30
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 833.23 ft
Shellmouth Reservoir: 1401.61 ft

2 thoughts on “Lake Manitoba update: Sept. 24, 2017

    • Fairford has been running at maximum capacity since last fall – the flow is conditional on lake level and wind. It falls with the lake level. The province announced last week a short reduction in flows (Sept 25 to Oct 4) to collect in-stream data and to conduct an under water inspection of the structure:

      Looking at the flow readings for the last few days, it appears that MI is reducing flows gradually. The current flow through Fairford (8:00 AM Sept 26) is 7,381 cfs.



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