Milk River Ridge Reservoir is an artificial lake in southern Alberta, Canada.

1956: Reservoir built by the Prairie Farm Rehabilitation Administration (PFRA) as a balancing reservoir and offstream storage for St. Mary River Irrigation District.

1994: Raymond Reservoir Generating Station built by Irrican Power.

Committee Members: Town of Raymond, PFRA, Environment Canada, University of Calgary, Health Canada, and Chinook Health Region 2003-2007: Study by Sue Watson, Bunny Mah, Shannon Braithewaite documented issues with water quality, livestock entering reservoir, dead livestock near or in reservoir, algal blooms.

2004: St. Mary River Irrigation District Main Canal Drops #4, #5, #6 were brought on-line 2014: Milk River Ridge Reservoir Water Quality Stewardship Initiative (MRRWQSI) begins.