MDT Starts MT 86 Structures Project, Fix Aging Bridges

Three bridges in Bridger Canyon will be replaced in coming years

BOZEMAN, Montana (August 24, 2021) – While safe, the bridges on picturesque MT 86 cannot be expected to continuously bear progressively heavier loads and increasing traffic. Replacements are needed to bring three aging bridges up to current standards while accommodating Bozeman and surrounding areas’ growth. The Montana Department of Transportation (MDT) is addressing this need with engineering partner Morrison-Maierle through the MT 86 Structures project. Through this work, three bridges over Cache Creek, Carrol Creek and Flathead Creek will be replaced.

“Some of these wooden bridges date back to 1939, a time when the Gallatin Valley looked very different from today,” said William Fogarty, Butte District Administrator for the Montana Department of Transportation. “As the valley expands and brings increasing and heavier loads onto the highway, stronger structures are needed.”  

The MT 86 Structures project will analyze three bridge crossings and determine the best route for replacement. Staff will explore the feasibility of replacing a bridge with a box culvert, a tunnel-like structure, or whether a new bridge will be needed. Once the right solution is chosen, engineers will begin the process of creating project plans and designing each structure.

The three bridge crossings in this project are all located north of Bridger Bowl, nearby Fairy Creek Road, Sedan Road, and Flathead Creek Road.

Funding for construction has not yet been identified or secured. As such, a target date for completion is not yet in place. However, the project team aims to complete plans by 2023. By having plans ready within the next few years, this project is in a better position for construction should funding become available.

Those interested in updates or more information on the MT 86 project are advised to email takami@bigskypublicrelations.com. Information is also available on the project web page, www.bitly.com/bridgerstructures, and will be continually updated throughout the course of the project.    

Alternative accessible formats of this document will be provided on request. Persons who need an alternative format should contact the Office of Civil Rights, Department of Transportation, 2701 Prospect Avenue, PO Box 201001, Helena, MT 59620. Telephone 406-444-5416 or Montana Relay Service at 711.