Zelma Reservoir

Zelma Reservoir is a reservoir in the Canadian province of Saskatchewan in the Rural Municipality of Morris No. 312. It is about 17 km east-southeast of the town of Colonsay. The reservoir was built in 1967 as part of South Saskatchewan River Project. That project, originating at Gardiner Dam of Lake Diefenbaker, involved the building of aqueducts, canals, and a series of reservoirs to supply water for irrigation, consumption, and industry. Other reservoirs in the system include Broderick Reservoir, Brightwater Reservoir, Indi Lake, Blackstrap Lake, Bradwell Reservoir, and Dellwood Reservoir.

The BHP potash mine at Jansen gets its water supply from Zelma Reservoir through the Zelma East Non-Potable Water Supply.

There are no communities along the reservoir's shores. Besides Colonsay, other nearby communities include Zelma and Young. There is a public boat launch at the north-east corner, near the dam and access is from Highway 763.

Zelma Dam
Zelma Dam (51.8424°N, -105.8516°W), which was built in 1967, contains the reservoir. The dam is 9.1 m high and the reservoir has a capacity of 14555 dam3. The dam and reservoir are owned and operated by the Saskatchewan Water Security Agency.

Fish species
Fish commonly found in Zelma Reservoir include northern pike, yellow perch, and walleye. In 2019, Zelma Reservoir was stocked with 200,000 walleye fry.