Lake Manitoba update: July 8, 2018

Last week’s estimate of the lake level was wind affected and too low. This week’s estimate looks more reliable with the two gauges showing similar readings. The current estimate of the level of Lake Manitoba is 811.81 feet. It appears the lake has risen with the recent rains. Inflow on the Waterhen River remains high at 6,498 cfs. This is well above the long-term average flow of 4,800 cfs for early July. The high continuing high inflow from the Waterhen River (due to a high level of Lake Winnipegosis) is keeping the level of Lake Manitoba from declining further. Outflow at Fairford is 5,898 cfs this morning. Flow on the Whitemud River has dropped to 167 cfs. The level of Lake Winnipegosis is currently 832.82 feet, unchanged from last week. The level of Lake St. Martin is down this week to 800.03 feet. The flow on the Assiniboine continues to fall and is currently 2,779 cfs at Holland and 2,278 cfs at Headingly. The Shellmouth Reservoir is down this week to to 1403.44 feet.

River update
Time: 9:30 AM July 8, 2018
Portage Diversion: closed
Assiniboine at Holland: 2,779 cfs
Assiniboine at Headingly: 2,278 cfs
Waterhen: 6,498 cfs
Whitemud: 167 cfs
Fairford: 5,898 cfs
Lake update
Time: 9:30 AM July 8, 2018
Steep Rock: 811.78 ft
Westbourne: 812.84 ft
Mean level Lake Manitoba: 811.81
Lake Manitoba desired operating range: 810.5 to 812.5 ft
Lake St. Martin: 800.03 ft
Lake St. Martin desired operating range: 797.0 to 800.0 ft
Lake Winnipegosis: 832.84 ft
Shellmouth Reservoir: 1403.44 ft

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