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Gardiner Dam Outflow to See a Further Increase Due to Alberta Rainfall

June 23, 2014 - The Water Security Agency (WSA) is advising the public of another increase in outflow from Gardiner Dam.

The inflows to Lake Diefenbaker from the heavy rainfall events in Alberta are now materializing in Saskatchewan. Flows peaked in Medicine Hat over the weekend at roughly 3,000 cubic metres per second (m3/s), and peak inflows of 3,300 m3/s are expected to arrive at Lake Diefenbaker today with the lake level peaking around July 3, 2014.

In order to not exceed the full supply level of Lake Diefenbaker, outflow from Gardiner Dam will be increased from approximately 920 m3/s to 1,100 m3/s.

This will result in the current water level on the South Saskatchewan River downstream of Gardiner Dam rising by approximately 0.3 m above the current level. Flooding is likely to occur on some low lying agricultural land located in the flood plain downstream of the dam, however it will be less than the event in 2013 when peak outflow was approximately 2,000 m3/s.

On the Saskatchewan River system, flows will be above normal for this time of year but are not expected to cause any flooding issues.

Water levels in the river section below Tobin Reservoir will rise approximately 0.2 m above the current level around June 25 when reservoir outflows are planned to be increased to 1,600 m3/s. The Codette and Tobin reservoirs will fluctuate within their normal operating range.

The forecast for stream flows and any other relevant updates will be posted to WSA’s website at wsask.ca.

The Water Security Agency was created to lead implementation of the 25 Year Saskatchewan Water Security Plan.  The plan will improve water management capacity and service to individuals, businesses and communities across Saskatchewan.  The agency brings together all of the major responsibilities related to water quality and quantity.


For more information, contact:

Patrick Boyle
Water Security Agency
Moose Jaw
Phone: 306.694.8914
Email: Patrick.Boyle@wsask.ca
Cell: 306.631.6997