Lake Manitoba update: Feb. 11, 2018

Another week of slow and steady change. The level of Lake Manitoba has fallen slightly to 811.89 feet. As the lake level falls, so does the outflow at Fairford, now 6,092 cfs. Inflow from the Waterhen River is also falling and is now 2,499 cfs. The gauge on the Whitemud is still malfunctioning but it is still safe to say that it still at a trickle. Lake St. Martin rose this week to 802.11 feet. Lake Winnipegosis is also up this week to 832.34 feet. Flow on the Assiniboine is still low, being 821 cfs at Holland and 805 cfs at Headingly. The Shellmouth Reservoir rose for the first time in a very long time, and is now 1,395.80 feet.

River update
Time: 08:30 AM February 11, 2018
Portage Diversion: closed
Assiniboine at Holland: 821 cfs
Assiniboine at Headingly: 805 cfs
Waterhen: 2,499 cfs
Whitemud: gauge malfunctioning
Fairford: 6,092 cfs

Lake update
Time: 08:30 AM February 11, 2018
Steep Rock: 811.90 ft
Westbourne: 811.89 ft
Mean level Lake Manitoba: 811.89 ft
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 802.11
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.32 ft
Shellmouth Reservoir: 1395.80 ft

5 thoughts on “Lake Manitoba update: Feb. 11, 2018

  1. There is no fixed operating range for Shellmouth – it is operated according to projected water conditions. Last year, when there was a serious risk of flooding, the level of Shellmouth was dropped over winter dramatically: it was about 5 feet lower at the same time last year than it is today. When there is a risk of drought, it is kept higher so that it can be used to maintain summer flow in the Assiniboine for irrigation. Right now it is exactly at its average long-term level for this time of year. This seems appropriate given the low snowpack, and the favourable flood forecasts (low risk right now). SF


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