As the historical water level graphs below indicate, water levels in Turtle Lake have fluctuated over a range of 1.6 meters  since 1964.  After significant controversy and consultation the Saskatchewan Watershed Authority placed a weir at the South Bay outlet on April 25, 1986 and established the Full Supply Level (FSL) at 654.78 meters above sea level. This weir is still in place today at this level.

Water levels in June of 2007 were at 40 year maximum peak levels and were running at 19 inches above the full supply level (FSL) elevation at the outlet at South Bay. 

Outlet of Turtle Lake in June 2005 (no outflow)                Outlet of Turtle Lake in June 2007 (19" above FSL)

Last updated:  Feb. 7, 2012

Historical Peak Water Levels on Turtle Lake