The University of Idaho will close Perimeter Drive at State Highway 8 beginning Monday, August 31, for a comprehensive bridge replacement and creek corridor improvement project expected to last until May 2027. The closure affects the western campus entrance and will require significant traffic rerouting across the Moscow area.
Recent flooding events revealed structural vulnerabilities in the aging bridge and surrounding creek infrastructure, prompting university officials to prioritize the replacement work. The project aims to enhance public safety and reduce construction complexity by completing the work before seasonal weather patterns and rising creek flows could create additional hazards.
Traffic and Transit Adjustments
Drivers will be directed to use Stadium Drive and Line Street as primary detours around the construction zone. SMART Transit has adjusted its routes to accommodate the closure and maintain regional connectivity. The university anticipates that Nez Perce Drive, currently closed for separate improvements, will reopen during the first week of September, providing an additional access option for campus traffic.
Parking along Perimeter Drive adjacent to Guy Wicks Field will remain available to the public throughout the construction period. Pedestrian traffic has been rerouted to the north side of State Highway 8, and the Paradise Path will be closed at the bridge location during active construction.
Funding and Project Scope
The State of Idaho’s Deferred Maintenance Initiative is funding the bridge replacement work. The nine-month timeline reflects the university’s commitment to completing the project before conditions deteriorate further and to minimize disruption to the academic year and campus operations.
The project represents a significant infrastructure investment for the Moscow campus and addresses maintenance challenges that have accumulated over decades. Officials emphasized that the timing of the closure—beginning at the end of August—allows the university to schedule detours with minimal impact on the fall semester and campus access during the academic year.
Moscow residents and visitors should plan for extended traffic delays in the vicinity of the western campus entrance and consider alternative routes when accessing the university or traveling through the area. The university has indicated it will provide periodic updates on project progress and any changes to the expected reopening timeline.
Related to ongoing campus construction, the University of Idaho Golf Course and restaurant continue operating through parking lot construction, providing amenities for students and the community during the broader infrastructure improvements on campus.