STC-7787, old HWY 30; W plymouth ST BR, canyon CO

The Federal Highway Administration (FHWA) awarded $110,000 to the Idaho Department of Transportation under the Highway Planning and Construction program (CFDA 20.205) on June 20, 2025. This formula grant funds the replacement of the Plymouth Street Bridge in Caldwell, Idaho with a new two-lane structure as part of project STC-7787 on Old Highway 30 in Canyon County.

The primary deliverable under this award is the construction of a modern two-lane replacement bridge to improve transportation infrastructure and safety. The project incorporates a multimodal transportation component by preserving the existing bridge for continued use as a bicycle and pedestrian facility, thereby enhancing active transportation connectivity within the community. This approach aligns with the Highway Planning and Construction program's emphasis on comprehensive transportation infrastructure development that addresses both vehicular and non-motorized transportation needs.

Project description

Replace the plymouth ST. Bridge in the city of caldwell with a new two-lane structure, leaving the existing bridge in place for use as a bicycle and pedestrian bridge.