Paving on I-90 near mountain passes to kick off this month

Four lanes of I-90 stretch toward the horizon near Mullan

Two resurfacing projects will begin this July on several miles of Interstate 90 near Fourth of July and Lookout passes, with the first set to start Monday.

Paving between Wallace and Mullan will start next week and is scheduled to take until September, with traffic reduced to one lane in each direction. Crews will add an 85-foot-long wall and fencing at milepost 67 to protect drivers from potential rockfall.

These improvements were added to the project after boulders fell down a steep chute onto the freeway during two separate events in June and November of 2020. The project was originally scheduled to be constructed in 2024 but was advanced to this summer with funds from Governor Brad Little’s “Leading Idaho” investment, which includes a one-time transfer from the state’s budget surplus of $126 million dedicated in 2021 by the Idaho Legislature.

The bottom of Fourth of July Pass will also undergo construction as part of a different project starting in late July. Work this year will focus on improving the driving surface four miles east of the pass, and concrete barrier will be installed in the median next spring to prevent head-on crashes. While work is underway, one lane in each direction will be closed.

For both work zones, all traffic will eventually be crossed over to run on one set of lanes and will be divided by cones rather than a median.

Other work zones on I-90 include bridge replacements in Kellogg and a range of smaller projects to address bridges, concrete barrier and ramps. Drivers should plan extra time for commuting and check for traffic conditions and restrictions on up to seven planned work zones east of CDA this summer.