Cyr Bridge Project logo

Project Overview

The Montana Department of Transportation is rehabilitating the Cyr Bridge located on Old Highway 10 west of the town of Alberton in Mineral County.

Project Map

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The bridge was originally constructed in 1932 and is showing signs of its age. MDT is proposing to repair or replace the bridge deck while repairing and strengthening the existing steel superstructure. The proposed improvements will help improve motorist safety, increase the weight limit of the bridge to handle all legal loads, and extend the life of the bridge.

Cyr Bridge

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The project will ensure the continued safe operation of the bridge for many years to come. The proposed improvements are a cost-effective option that reduce construction time, serves motorists well into the future, and helps preserve the appearance of the historic bridge.

Planned Improvements

The planned improvements include:

  • Repairing or replacing the existing bridge deck.
  • Replacing the bridge railing.
  • Repairing and strengthening the steel superstructure.
  • Strengthening the concrete approach spans.
  • Cleaning and spot painting the steel superstructure under the bridge where needed.

What are the benefits of bridge rehabilitation versus bridge replacement?

MDT is committed to thoughtfully preserving Montana’s bridge infrastructure. The cost to replace the bridge is significantly higher than rehabilitating the bridge’s components. The project will develop economical options for extending the life of the bridge and the local access it provides. By electing to rehabilitate the bridge rather than fully replacing it, MDT will move forward with an option that both maximizes value for Montanans and preserves the historic nature of the existing bridge.

Preliminary design phase 2020-2021
Present preliminary design information to the public Spring/Summer 2021
Final design 2021-2022
Present final design and construction information to the public Spring/Summer 2022
Construction anticipated 2023

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. The public’s input will help guide MDT in the design and construction of the bridge improvements.

UPN 9524000