Moorhead Grade Separation


In the largest transportation construction project to date for the City of Moorhead, Minnesota, Ames built an underpass that eliminated the intersection of two railroad lines with two arterial city streets.

The two arterial city streets now pass under three railroad bridges, and new retaining walls support the residential and commercial properties along the perimeter of the project’s excavation.

To accommodate the underpass design, Ames altered or installed several city utilities, streets, and a substantial stormwater lift station. Crews then built the railroad bridges and placed the sub-ballast for the railroad track in preparation for track placement.

The project included approximately 1 mile of road reconstruction to realign the streets intersecting beneath the bridges. The new underpass reduces congestion and improves safety for motor vehicles, bicycles, pedestrians, emergency responders, and students at the adjacent Moorhead High School.

Markets: Transportation, Roadways, Grade Separations

Location: Moorhead, Minnesota

Client: City of Moorhead

Completion: October 2022


  • Earthwork
  • Utilities
  • Railroad bridge construction

2023 Project of the Year, Small Cities/Rural Communities Award
Category: Transportation
American Public Works Association

2022 Public Works Project of the Year
American Public Works Association, Minnesota Chapter

2022 Project of the Year
City Engineers Association of Minnesota

2022 Excellence in Concrete Award
Aggregate and Ready Mix Association of Minnesota