Montana Department of Transportation

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Active Project - US-2 Swamp Creek East Project

US-2 Swamp Creek East

US-2 Swamp Creek East project logo

Project Overview

The Montana Department of Transportation is improving US 2 approximately 15 miles southeast of Libby. The project will reconstruct five miles of roadway and replace a bridge over Swamp Creek. Construction is anticipated to be completed in fall 2020.

The project includes:

  • Widening the travel lanes to 12 feet.
  • Adding 4-foot shoulders on both sides of the roadway.
  • Adding 4-foot shoulders.
  • Replacing a bridge over Swamp Creek with a wider single-span concrete bridge.
  • Repaving the road surface of US 2.
  • Using Geofoam block as part of the road base to limit the settling of the road.
US-2 Swamp Creek East project map
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Swamp Creek Bridge

Work to replace a bridge over Swamp Creek was was completed in 2019. The original bridge was a narrow bridge that had deteriorated over the years and needed to be replaced. Rehabilitation and maintenance of the bridge was no longer practical.

The new bridge is a much wider, single-span concrete design that will serve motorists well into the future. The new design includes 12-feet wide travel lanes and 8-foot shoulders. The bridge will be opened to traffic later this year once improvements to the roadway are completed.

Bridge construction image
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US Highway 2

US 2 serves as an important lifeline for Lincoln County. The roadway has settled and deteriorated due to the soft soils and swamp-like conditions in the area. The reconstruction of the roadway will provide motorists a safer and smoother driving surface.

Due to the poor soil conditions, MDT will utilize an innovative building feature called "Geofoam" to build the roadway. Geofoam is a synthetic block compound that takes the place of regular fill dirt. It has been used successfully around the country to increase longevity and stability in areas with difficult soil conditions.

Construction on US 2 is anticipated to be completed in late fall 2020.

Geofoam image
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Anticipated Project Schedule

Fall 2018 Construction begins to replace a bridge over Swamp Creek.
Summer-Fall 2019 Roadway widening begins; Geofoam blocks installed to build road base; Bridge is opened to traffic.
Summer-Fall 2020 Roadway widening is completed; Roadway is chip sealed.
Late Fall 2020 Construction complete.