Project Overview

The Montana Department of Transportation (MDT) will remove and replace the Kalsta Bridge that carries traffic across the Big Hole River, located three miles north of Glen on Montana Highway 91 (MT 91). This project will enhance safety features and improve traffic flow. Since 2024, the bridge has been closed to traffic due to structural deficiencies identified during inspections. Bridge construction is tentatively scheduled for 2028 based on completion of design, right-of-way, and funding availability.

The Kalsta Bridge replacement is currently in the design and right-of-way phases. The design process includes environmental and engineering studies and considers how the project can be constructed in the most cost-effective manner to meet the needs of the traveling public.

As the project develops, the bridge will continue to be closed to traffic with the current restrictions in place. Recreational use on the river below will not be affected. Once the project moves into the bridge removal and replacement phase, the project team will make every effort to minimize the impacts to roadway and river users.

The public and all stakeholders will be kept informed throughout the project. Community members and other stakeholders will be notified via this website, email and mailers.

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UPN 9667000