Root Control Dam, also commonly known as the Lake St. Joseph Dams, are located on the English River at the top of a diversion channel leading from Lake St. Joseph to the Root River. The dams were constructed in 1957 to provide for diversion of the waters of Lake St. Joseph into the English and Winnipeg Rivers. The Diversion Dam is a concrete structure with five log sluices, and the Block Dam is an earth structure.

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