Bridge replacement underway on State Highway 46 in Gooding County

Map of Big Wood River Detour on SH-46

Work began earlier this week to replace the bridge over Big Wood River at milepost 112.9 on State Highway 46 north of Gooding. Built in 1947, the current structure has reached the end of its service life.

“We will raise the height of the new bridge approximately 3.5 feet,” ITD Project Manager Tom Logan said. “The additional height will allow for more flood water to pass underneath the structure.”

The new bridge will also be both wider and longer to increase mobility and safety.

Initial work will first include setup of traffic control and then demolition of a portion of the old bridge. While work is underway, traffic will be reduced to a single lane. Temporary traffic signals will be in place to direct motorists throughout the duration of the project.

“Drivers can anticipate wait times between two and five minutes when traveling through the area,” Logan stated. “Lane width will also be restricted to 12 foot during construction, and we advise motorists to plan ahead and use caution while traveling through the work zone.”

Short-term closures of SH-46 will also be required for different portions of the project to allow for crews to safely complete various stages of work. When these closures occur, signs will be in place to direct motorists through a detour route. Approximately four closures are anticipated throughout construction.

Cannon Builders of Idaho are the primary contractor on this replacement project that is expected to be complete this fall.