Traffic Control Update
During construction, motorists traveling through the project area can expect a 12-foot width restriction, reduced speeds, detours, alternating traffic, occasional single lane traffic, and possible delays. Construction updates are available.
Traffic control may vary at each site. All wide loads should coordinate alternate routes with Motor Carrier Services at 406-444-7262.
Project Overview
The Montana Department of Transportation (MDT) and its partner, Kiewit, have begun construction on the MT 200 Bridges Lewistown Area project.
This project will reconstruct 10 bridges along US Highway 87 (US 87)/Montana Highway 200 (MT 200) in the Lewistown area, replacing the aging structures with new bridges or culverts. Nine of the bridges were constructed prior to 1940 and the timber structures are reaching the end of their useful and serviceable life. In addition to the bridge replacements, the project will include:
- Minor road and approach construction to tie the new structures into the existing road
- Widening an approach for mail route turn-around (bridge #5993)
- Flattening the Briggs Coulee curve (bridge #6005)
- Flattening the roadway profile and installing lighted wildlife signage at Elk Creek (bridge #6101)
- Upgrading the Ayers irrigation ditch
- Improving flood conditions at North Fork McDonald Creek (bridge #5994)
- Reconstructing nearly three miles of roadway adjacent to bridges
- Widening shoulders near the bridges
- Installing new guardrail
- Installing rumble strips
- Fencing improvements
Construction is expected to continue through 2026, weather and other unforeseen factors permitting.
Project Map
UPN 9884000