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Scarsella Brothers Proceed With Idaho I-90 Interchange Rebuilding The Idaho Transportation Department (ITD) is reconstructing the interchange at Interstate 90 and State Highway 41 in Post Falls, as well as improving SH 41 and local roads surrounding the interchange. The project was awarded to Scarsella Brothers Inc. of Seattle, Wash., for $78 million. The current interchange was constructed in the early 1970s, with modifications to the eastbound off-ramp in the early 1990s. “The irregular intersection of Seltice Way and ID 41 has served its design life and is now a challenge for motorists,” said Heather McDaniel, public information officer of the Idaho Transportation Department, District 1. With average daily traffic numbers for 2025 around 66,250, she added, “Congestion in recent years has contributed to multiple severe and fatal crashes, especially at the westbound off-ramp.”
By Lori Lovely
CEG CORRESPONDENT
Plans The plan to replace and upgrade the interchange at I90 and SH 41 emerged as part of the I-90 Corridor Study from the Washington state line to 15th Street in Coeur d’Alene, Idaho, McDaniel said. The interchange is a central point of connection for other corridor projects planned to be built in future years, including expansion of the interstate to four lanes in each direction and the development of other improved interchange locations at U.S. 95 and Northwest Boulevard. “Once finished, the reconstructed interchange will improve safety, increase capacity, provide better connectivity to SH-41 and position I-90 for future expansion,” said Shannon Stein, ITD project manager.
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This complex interchange construction project includes building significant infrastructure such as: • 1.3 mi. of I-90 pavement reconstruction; • SH 41 widening and pavement reconstruction from Seltice Way to 12th Avenue; • .5 mi. of widening and pavement reconstruction of Seltice Way; • six permanent bridges; • two temporary bridges; • eight retaining walls; • two pedestrian underpasses; • one pedestrian bridge; • upgrades to intersections with three traffic signals; • one pedestrian (“hawk”) signal; and see I-90 page 8
The interchange at Interstate 90 and State Highway 41 in Post Falls, Idaho, is undergoing multiple improvements.
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A Cat excavator is among multiple pieces of heavy equipment being used on the I-90 project.