Water Supply Outlook for Alberta

November 2012

Recorded March 1 to September 30, 2012 Natural Runoff Volumes - Oldman River Basin (Natural Flows)

2012 Recorded Volumes
March 1 to September 30 		2012 Forecast Volumes
Locations Volume in dam3 Volume as a
% of Average 		Ranking (lowest to highest) Average difference between Forecast and Recorded natural volumes
St. Mary River 790,000** 106 60/91 11%
Belly River 280,000* 114 71/91 17%
Waterton River 541,000* 89 28/91 9%
Oldman River near Brocket 1,181,000* 108 57/91 8%
Oldman River at Lethbridge 3,087,000* 103 51/91 8%

* - Recorded 2012 natural volumes are preliminary and subject to change
** - This value is the natural volume and includes the U.S. share

Average and rankings are based on the period 1912 to 2001

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