The MN-40 highway bridge at Milan is one of the few remaining through truss bridges left in the state of Minnesota on a state or federal highway. A through truss is the style where the highway runs through the truss structure, and not above or below the truss. This bridge was built in 1938, replacing an earlier bridge that would be flooded out due to the completion of the Lac Qui Parle Dam some 7 miles downstream.

The bridge sits near the northeast end of a causeway. There are about 200 feet of causeway northeast of the bridge, and about 1400 feet of causeway southwest of the structure. The metal bridge structure is 162 feet long, but the overall bridge is 220 feet long when you include the concrete abutments. The bridge can accomodate loads as tall as 16 feet, and during periods of normal water levels, the deck sits 17 feet above the water level on the tall end of the structure. The concrete pillars have some interesting Art Deco era details, while the bridge railings have a classical wrought iron look.

The bridge is a popular fishing location. There is a day use area on the downstream side of the bridge complete with a fishing pier. One may also fish from the bridge sidewalk or from the causeway.