Qu'Appelle River Dam

The Qu'appelle River Dam is the smaller of two embankment dams along the South Saskatchewan River that created Lake Diefenbaker in the Canadian province of Saskatchewan. The bigger of the two dams is Gardiner Dam, which is the third largest embankment dam in Canada and one of the largest in the world. Construction of both dams began in 1959 and was completed in 1967. Lake Diefenbaker is the largest lake in southern Saskatchewan. The dam is the source of the Qu'Appelle River and it keeps the flow of water down the river relatively constant. Formerly, the Qu'Appelle River dried up in many places every summer at the conclusion of the spring freshet from the Rocky Mountains. Constant, steady flows down the Qu'Appelle River are important as downstream there are several smaller dams and reservoirs that supply water for irrigation, industry (such as the Mosaic potash mine at Belle Plaine), and drinking water for cities such as Regina and Moose Jaw. The dam is 3,100 metres (10, 200 ft) long, 27.4 metres (90 ft) high, and, along with the Gardiner Dam, holds back a reservoir that contains 9,400,000 dam3 (7, 600, 000 acre⋅ft) of water.

Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).