The Water Security Agency (WSA) is warning residents and recreational users along the South Saskatchewan River to exercise extreme caution as increased runoff from heavy rainfall in Alberta has prompted spillway operations at Gardiner Dam.
The higher-than-normal inflows into Lake Diefenbaker have led the WSA to significantly increase water releases from the dam.
Beginning July 2, outflows from Gardiner Dam will increase from approximately 270 cubic metres per second (m³/s) to 470 m³/s.
On July 3, releases are expected to rise further to approximately 770 m³/s as spillway operations commence.
Current plans indicate the spillway will remain in operation until approximately July 25, after which outflows will gradually be reduced.
The WSA notes that additional adjustments may be necessary if further rainfall increases inflows into Lake Diefenbaker.
River Levels Expected to Rise
Communities downstream of Gardiner Dam can expect noticeably higher water levels over the coming weeks.
The WSA estimates the South Saskatchewan River will rise by approximately two metres through the Moon Lake area and about 0.8 metres within Saskatoon.
In addition to higher water levels, river currents will become significantly faster, creating potentially hazardous conditions for anyone on or near the water.
Stay Safe
The Water Security Agency is urging the public to avoid the spillway area and maintain a safe distance from Gardiner Dam throughout the operation.
Boaters, paddlers, anglers, swimmers, and anyone using the river are advised to carefully assess conditions before entering the water, as the increased flow and stronger currents pose a serious safety risk.
Motorists travelling across the dam are also reminded to obey all traffic regulations and remain alert for pedestrians.
The WSA will continue to monitor weather conditions and reservoir inflows and may adjust water releases if additional precipitation occurs.
Follow the WSA website for important updates.