I-94 Midway Grant Marsh Bridge Engineering and Feasibility Study

The Midway Interchange area and Grant Marsh Bridge connect I-94, I-194, and Bismarck and Mandan. The existing bridge and interchanges were constructed with the surrounding Interstate system, which has not experienced major improvements since it was originally built in 1965.

The bridge is reaching the end of its useful life and will need replacement in the future. This provides an opportunity to consider operational improvements for the I-94 and I-194 roadways and ramps. These Interstate improvements would work jointly with replacement alternatives for the Grant Marsh Bridge.

This Study will provide project-level analyses and early decisions that follow Federal Highway Administration (FHWA) guidance under the Planning and Environment Linkages (PEL) initiative. More information on PEL studies can be found at: www.environment.fhwa.dot.gov/env_initiatives/PEL.aspx

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Project Goals

• The purpose of this study is to determine alternatives that improve traffic operations, increase capacity, reduce driver confusion, and maintain a uniform freeway system. 
• By following the PEL Study process, transportation planning is connected with environmental community concerns.
• At the conclusion of this feasibility study, a project will be incorporated into the federal environmental review process.

Feedback

Provide your feedback on the potential design elements and theme that will be considered during the next phase!

The I-94 Midway Grant Marsh Bridge Engineering and Feasibility Study is preliminary in nature. The bridge conceptual design will be further developed in the next phase of project development, including aesthetic features that could potentially be incorporated into the project.

For details on submitting comments visit the event page.

Virtual Public Input Meeting - May 13, 2026