MT 37 bridge project logo

Project Overview

The Montana Department of Transportation is evaluating 11 bridges on MT 37 between Libby and Eureka. The bridges are aging and in need of repairs and routine upkeep. Most of the bridges were built between 1959 and 1974. They are safe to drive on, but it is important to identify needed repairs to keep them safe and functional. Just like an oil change for your car, routine upkeep of the bridges extends their service life and ensures Montanans receive the best return on our bridge investments.

The evaluations will allow MDT to determine and prioritize the needed repairs and will include:

  • Testing the bridge decks (driving surface) to evaluate the current condition.
  • Verifying inspection reports and repair lists.
  • Gathering input from local maintenance staff on individual bridge issues.
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 5,000 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 preformed 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 Late 2022
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