Main Avenue Bridge over the Red River

A combination of geometric, structural, and flooding challenges led the Minnesota and North Dakota Departments of Transportation to replace the Main Avenue Bridge over the Red River, a key gateway connecting the cities of Moorhead and Fargo.

SRF was instrumental in the project, beginning with the development of a bridge concept development report that included:

• Hydraulic analysis to address flood risks.
• A bridge type study to explore viable structural options.
• An environmental inventory and urban design assessment to ensure compatibility with the surrounding area.

As the project progressed, SRF provided full design services for the new bridge, retaining walls, and roadway approaches, carefully aligning the infrastructure to meet the elevated bridge profile. Additionally, SRF reimagined 3rd Street in Moorhead as a riverfront parkway beneath the east end span of the bridge, creating a functional and scenic connection to the Red River.

The project also included riverfront plazas and amenities for both Fargo and Moorhead. These urban enhancements featured:

• Gateway towers and ornamental railings to reinforce the bridge’s landmark status.
• Decorative lighting and historic plaques to celebrate the region’s rich history.
• A mid-span plaza overlook offering stunning views of the Red River corridor and opportunities for public engagement with the environment.

SRF’s comprehensive approach to bridge design and urban integration delivered a structure that balances regional connectivity, flood resilience, and community-focused aesthetics. The Main Avenue Bridge now stands as a signature element of Fargo-Moorhead’s infrastructure, reflecting the area’s growth and vision for the future.

Resource links:
City of Fargo
City of Moorhead
Minnesota Department of Transportation – MnDOT
North Dakota Department of Transportation – NDDOT

More from:
Minneapolis, MN
Fargo, ND