The Ada County Highway District will close the intersection of South Whitewater Park Boulevard and West Main Street beginning Monday for underground sewer line work, with the intersection expected to reopen by September 13.
During the closure, West Main Street will be inaccessible between 27th Street and Whitewater Park Boulevard. Motorists will lose direct access to Interstate 184, Chinden Boulevard, and Fairview Avenue from Main Street.
Recommended Detour Route
Drivers needing I-184 access should use an alternate route: travel to 27th Street, proceed to State Street, then connect via Veterans Memorial Parkway and Curtis Road to reach the interstate.
Broader Project Timeline
The sewer work represents the second phase of a larger development project affecting the area. Once this phase concludes, Main Street will close west of Whitewater Park Boulevard extending toward the Boise River. The final phase of work is expected to continue through the end of October.
The closure is not part of an Ada County Highway District project. For questions about the work, motorists can contact Granite Excavation at 208-382-4188.
Residents and commuters in the Treasure Valley should plan ahead and allow additional travel time. Those regularly using this corridor to access I-184 or downtown Boise should familiarize themselves with the detour now to avoid delays during the closure period.
What Comes Next
The Ada County area continues to manage infrastructure strain as regional growth accelerates. Residents concerned about long-term transportation capacity in Ada County can monitor updates from ACHD on ongoing and planned projects at achdidaho.org.