MT 37 bridge project logo

Project Overview

The Montana Department of Transportation (MDT) is evaluating 11 bridges on Montana Highway 37 (MT 37) between Libby and Eureka. The bridges are aging and in need of repairs. The bridge in Libby over the Kootenai River was built in 1959; the bridge near Jennings was built in 1969. The other nine bridges were built between 1971 and 1999. These bridges are safe to drive on, but it is important to identify needed improvements now to extend their service life.

Work includes:

  • Evaluating the current condition of the bridge decks (driving surfaces).
  • Verifying past inspection reports.
  • Gathering input from local maintenance staff on individual bridge issues.
  • Determining the most cost-effective repairs to each bridge.
  • Developing plans to rehabilitate the bridges.
  • Presenting recommended repairs to the public.
project map

MDT's Bridge Management and Design Process

The MDT Bridge Bureau is tasked with keeping Montana's bridges safe, resilient, economical, and reliable. The Bridge Bureau has two sections: Bridge Management and Bridge Design.

The Bridge Management section inspects and maintains over 4,500 bridges throughout the state and guides maintenance for local agencies and jurisdictions. The Bridge Management section is responsible for conducting all inspections and evaluating needed repairs. Routine inspections are performed every two years. In-depth inspections occur on specific and critical bridge components as needed to ensure that the most important components of the bridge are in good working condition.

The Bridge Design section provides design and engineering management on bridge replacement, rehabilitation, and preservation projects. They also establish and maintain design criteria and standards, participate in research projects, and promote design initiatives to improve bridge performance and value.

Process and Anticipated Schedule

Phase 1 – Bridge Evaluation 2020
Evaluate the bridges Completed
Determine repair or rehabilitation needs Completed
Present recommended repairs to the public Completed - Fall 2020
Final Review Report Completed
Phase 2 – Bridge Design 2021 - 2023
Develop design plans 2021-2022
Present design plans to the public Completed - Spring 2023
Finalize design plans 2023
Construction *TBD
* Construction of the bridge improvements is dependent on the availability of funding and will be scheduled once the design plans are finalized.
bridge photo

Stay Involved

Public involvement is important to MDT and the success of the project. The community will be notified about public involvement opportunities through the project website, local media, mailings, social media and other communication channels throughout the project development process.

UPN 9547001