[5] Moosomin Lake sits in the Pipestone Valley, which was created about 15,000 years ago with the melting of the last ice age.

The valley was cut by the melting waters from glacial Lake Indian Head and is called the Pipestone Spillway.

[6] The construction of Moosomin Dam (50°02′52″N 101°41′26″W / 50.0478°N 101.6905°W / 50.0478; -101.6905) along the Pipestone Creek began in 1953 and work was completed by November 1954.

It is an earth-filled embankment dam located at the south-east corner of Moosomin Lake that is 13.5 metres (44 ft) high with an uncontrolled overflow concrete spillway and a gated riparian outlet.

The project involves adding a 300 mm (12 in) thick concrete slab to the top of the existing spillway, upgrades to the embankment road, improvement to the drainage system, erosion prevention work, and improvement to the movement monitoring system.