The Corps completed construction of their portion of the project from 1941-1951. Operation of the project was transferred from the state of Minnesota to the U.S. Army Corps of Engineers in 1950. It is located on the Upper Minnesota River in western Minnesota near the South Dakota border. It consists of the Lac qui Parle dam, Marsh Lake dam, Highway 75 dam and the Watson Sag Weir and diversion channel on the Chippewa River. The Corps of Engineers operates and maintains day use recreation areas below Lac qui Parle and Marsh Lake dams.
Facilities consist of picnic areas, playground, privies, bank fishing and drinking water.
Lac qui Parle State Park is located on the west side of the Lac qui Parle dam. It has a modern campground and other recreation facilities to offer. Lac qui Parle project is also a tremendous place to view wildlife especially during the fall waterfowl migration. The Minnesota Department of Natural Resources controls a significant portion of the lake for wildlife management purposes. The Highway 75 dam impounds water for the Bigstone National Wildlife Refuge.