BLACKFOOT — The Idaho Transportation Department began construction of the new Riverton Road Bridge over Interstate 15 near Blackfoot on Monday.

The project will soon result in the closure of Interstate 15 in the area of the bridge on multiple nights.

The old bridge was damaged in October when a semi crashed into one of its support pillars. It will be demolished and replaced with a two-span steel girder bridge that will allow for future widening of Interstate 15.

Demolition will occur over three nights from May 18 to May 20, necessitating full closure of Interstate 15 at Riverton Road during those nights. Interstate traffic will be detoured at Exit 89 and Exit 93.

Work is expected to be completed in November. During construction speed limits will be restricted to 65 mph in the work zone.

Access over Interstate 15 on the Riverton Road Bridge will remain closed until the project is completed.

Drivers are encouraged to use the Idaho 511 system, either online, by phone or through the app, for updates on conditions and traffic impacts throughout the construction season.