CANYON COUNTY – The Idaho Transportation Department will begin maintenance work on two bridges in Canyon County starting Sunday night. Crews will work on both bridges simultaneously with construction lasting approximately one week.
The structures being repaired include the bridge for the eastbound on-ramp that crosses Indian Creek at the Karcher Interchange in Nampa and the Centennial Way Railroad bridge in Caldwell. Work will take place between 8 p.m. and 5 a.m. with speed limits reduced to 35 mph.
At the Karcher Interchange, the on-ramp will be closed. Motorists will still be able to access I-84 by following the signed detour.
At the Centennial Way Railroad Bridge, one lane will be open in each direction.
This work is part of a larger effort to repair bridges throughout southwestern Idaho to extend their service life and reduce maintenance costs. ITD has completed work on bridges in Elmore and Ada counties and will be working on bridges along US-95 in Adams/Idaho counties later this summer.
Repairs will include:
- Patching and sealing concrete
- Working on expansion joints
- Removing asphalt overlays
- Improving deck drains
- Milling and paving bridge approaches
- Painting steel structures
ITD is committed to minimizing disruption during construction while prioritizing the safety of both crews and motorists. Drivers are urged to use extra caution when traveling through active work zones.
To learn more about the project or sign up for construction updates visit the project website at ITDProjects.Idaho.Gov/pages/Bridges2025