Rat Rapids Control Dams (North & South) are located on the English River system at the east end of Lake St. Joseph and were constructed in 1935. With the construction of the Lake St. Joseph Diversion in 1957, water was diverted to the English Winnipeg system, resulting in very little energy generated at Rat Rapids which was subsequently retired from service in 1963. The generating equipment replaced with two log sluices in each dam in 1964.

Please visit the Lake of the Woods Control Board which manages data for this site.