April 3, 2024

The Montana Department of Transportation (MDT) and Frontier West are rehabilitating the Cyr Bridge located on Old Highway 10 west of Alberton. Construction is anticipated to begin in spring 2024 and be completed in the fall.

Planned improvements include:

• Repairing deteriorated concrete in the bridge deck (driving surface), piers, and retaining walls.
• Repairing and painting a portion of the steel superstructure.
• Replacing the bridge railing.
• Applying a deck crack seal to the bridge's driving surface.
• Resurfacing the roadway on each end of the bridge.
• Paving the vehicle parking area on the east side of the bridge.
• Installing a historical marker.

The bridge is expected to close the week of April 1 and will reopen in the fall when construction is complete. A detour route is in place during this closure (see below detour map for more information.)

What to expect during construction:

• Starting the week of April 2, the Cyr Bridge will be closed to vehicle and pedestrian traffic.
• The Clark Fork River Boat Ramp located near the Cyr Bridge will remain open.
• A detour route is expected to be in place throughout construction.
• For access to and from the boat ramp and the west side of the river, motorists will need to use the Fish Creek Interchange (Exit 66).
• For access to and from the east side of the river, westbound I-90 motorists will need to use the Cyr Interchange (Exit 70). Eastbound I-90 motorists will need to use the Alberton Interchange (Exit 75), enter I-90 traveling westbound, and exit at the Cyr Interchange.
• Boating and floating beneath the bridge will remain open, however signage may direct traffic to one side of the river at certain times. Do not linger beneath the bridge.