Bridge #6391 is an integral part of the Lac Qui Parle Dam. The dam has 12 spillway bays, with each bay separated by a concrete wall. These walls are brought up and flared out to form the piers for the bridge. The 11 piers and 2 abutments make a total of 12 spans. The spans are each 20 feet long, with the exception of the end spans, which are 18-1/2 feet long, for a total of 239 feet in overall length. Each span is crossed by a group of 6 reinforced concrete girders which in turn supports the reinforced concrete deck.

There has been a bridge located on top of the Lac Qui Parle Dam since the dam was built in the late 1930s. The dam was rebuilt in 1996, with most of the bridge being replaced in the process. As the bridge is currently configured, it has two standard traffic lanes, two minimal shoulders, and a set of modern solid concrete guardrails. A sidewalk is located on the downstream side of the bridge deck, while the upstream side of the bridge deck supports the mechanical equipment that operates the dam gates.

The Lac Qui Parle Dam Bridge is a popular location for fishing. The lake is reported to have some of the best walleye fishing in the state.

The photo above is looking west down the length of the bridge deck from the center of Chippewa County Highway 13. The photo below is a view of the bridge as seen from the dam face near the southeast corner of the structure.

The photo above is looking down the length of the bridge deck from the southeast corner of the structure. The photo below is the bridge plate, which carries the date of the bridge reconstruction rather than its original construction date.