Bridge on ID-3 in St. Maries reopened last week, ending detour through town

A truck crosses the railroad bridge on ID-3 in St. Maries after its reopening in Jan. 2019.

The St. Maries Railroad Bridge on Idaho Highway 3 is now open to two-way traffic, meaning drivers will no longer need to detour through town.

Crews have also suspended work on the bridge on ID-3 over the river for the winter to ensure the highest quality completed project. Other tasks that are not weather dependent will continue.

Most other traffic and parking situations have returned to how they before construction, specifically:

  • A four-way stop at ID-3 and ID-5.
  • Two-way traffic on both 10th and 11th Streets north of Main Avenue.
  • NO four-way stop at Main Avenue and 10th Street.
  • The intersection at 10th Street and Railroad Avenue will be placed back into the original configuration of stop signs on 10th Street in both direction and free-flowing traffic on Railroad Avenue.

Traffic patterns on the river bridge will continue to function as they have been–two-way traffic shifted to the west side of the structure. In coordination with this work, the south end of Meadowhurst Drive will continue to be closed, and Riverside Avenue under the bridge will be intermittently closed as needed for construction. These impacts will be in place through completion of construction.

Pedestrian access across the river bridge will also remain the same: a sidewalk on the west side of the river bridge connects to a pedestrian crossing over Railroad Avenue and to the new sidewalk on the railroad bridge.

Upon completion in early summer 2019, both bridges will include one lane in each direction with a shoulder and sidewalk on each side. Work also includes reconstructing the highway to match the upgraded bridges, replacing guardrail and signs in several locations and improving the adjoining intersections.

Check 511 for traffic impacts or visit the “Projects” tab at for more information.

Members of the public are also invited to contact the project team by calling the project hotline at 208-292-8515 or by emailing Gemma Puddy at