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The Montana Department of Transportation (MDT) and Sletten Construction are replacing the German Gulch Road bridge deck. The replacement requires the closure of the bridge over Interstate 15 (I-15). The closure began the week of July 15th and is anticipated to last approximately two months. All interchange ramps remain open.

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Project Overview

The Montana Department of Transportation (MDT) and Sletten Construction are rehabilitating seven bridges on Interstate 15 (I-15) and Interstate 90 (I-90) in Silver Bow and Jefferson counties. These bridges were built between 1961 and 1966 and are in need of repair and routine maintenance. This project will provide cost-effective improvements that will enhance safety features, provide a smoother driving surface, and increase the service life of the bridges. The bridges include:

  • I-15 German Gulch Road Exit 119
  • I-15/I-190 Montana Street Exit 126 (north and southbound bridges)
  • I-15/I-90 Harrison Avenue Exit 127 (north and southbound bridges)
  • I-90 Burlington Street
  • I-90 Homestake Pass Road Exit 233
project map

Improvements on the bridges will vary, but each will include work to rehabilitate the bridge and extend their service life.

German Gulch Road Bridge will have its bridge deck (driving surface) replaced which will require a full closure of the bridge.

Homestake Pass Road Bridge will have its bridge deck rehabilitated and be reduced to one lane over the interstate.

Montana Street and Harrison Avenue Bridges will have their concrete substructure rehabilitated. This work will impact traffic on Montana Street and Harrison Avenue but should not impact traffic on the interstate.

Burlington Street Bridge will have its concrete substructure rehabilitated. This work will impact traffic on the interstate but should not impact traffic on Burlington Street.

Work on bridges may include:

  • Bridge deck replacement.
  • Bridge deck milling and overlay.
  • Bridge rail and guardrail replacement.
  • Expansion joint replacement.
  • Roadway approach resurfacing.
  • Substructure repair.

Stay Informed During Construction

MDT will notify the public about traffic impacts and work activities through the project website, local media, social media, and email and text notifications during construction.

Current construction information and road conditions can be found on the MDT Travel Info App.

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UPN 9315000