Camp Ripley Bridge, Combined road and rail bridge in Green Prairie Township, Minnesota, US

Camp Ripley Bridge is a combined railway and road bridge crossing the Mississippi River, built in 1930 by the Minneapolis Bridge Company. It features five steel sections supported by four massive concrete pillars in the water, with two center girders carrying railroad tracks in the middle and side beams supporting the roadway at the same level as the tracks for vehicles.

Built in 1930 as part of a major transportation improvement effort in Minnesota, it was designed primarily to connect Camp Ripley, a training site for the Minnesota National Guard, with the road network. The structure allowed trucks, trains, and cars to cross the river more efficiently, supporting the movement of supplies and personnel to the military facility.

The bridge is known locally as Bridge 4969 and represents a key connection that shaped how the region developed and communicated. It shows how engineers solved the problem of moving both military personnel and civilian traffic by designing a single unified structure.

The bridge carries Minnesota State Highway 115 and a railroad spur at Camp Ripley, in Morrison County; it is a working crossing, so expect traffic rather than a pedestrian path. View it from the riverbanks near the Camp Ripley reservation, and check access rules for the military installation before approaching.

Camp Ripley Bridge is the only remaining unified road–rail bridge over the Mississippi River, which earned it a place on the National Register of Historic Places in 2015. Its single deck carries both a railroad spur line and Minnesota State Highway 115, so a visitor can watch a train and highway traffic share the same span.