Boise Creek bridge closes today for six months
Published 3:45 pm Monday, June 1, 2026
Enumclaw’s Boise X Connection Bridge has closed for several months, altering how traffic can get onto and off of SR 410 near the White River Bridge.
The structure, located on 473rd Street SE just north of the river, was no longer accessible June 1 and reopen near November.
Construction was originally planned for the summer of 2025, but was delayed “due to funding obligations and permitting issues,” Amy Bresslour, King County communications and customer service manager said. “We can only construct in the fish window which we missed in 2025. We also needed more time for the fabrication lead time for the girders. We’re looking forward to constructing this bridge in 2026.”
According to King County, the 70-year-old structure has outlived its useful life: the steel deck and girders are rusting, the timber foundations are rotting, and the lead-based paint is peeling are all concerns not just for drivers, but the surrounding environment as well.
Additionally, its current weight limit means fire engines and commercial trucks cannot access the road from the highway.
The new bridge will have a higher weight limit and will be wider than the current bridge. It will also help straighten the road, making it easier for drivers to see ahead.
Finally, there will be public art created at the bridge site after construction is complete.
The county expects the bridge to be completely closed from the summer to the fall, perhaps to the chagrin of locals who use 248th Way and SE Mud Mountain Road to skirt the “Buckley Crawl” traffic in the mornings and evenings.
The closure also means that those needing to go west on SE Mud Mountain Road must access the road via 252nd Ave and 248th Way.
While the bridge closure will not affect access to the Boise Creek Trail and Pinnacle Peak Park, access to the Foothills Trail and the Lower Boise Creek Trails may be temporarily restricted.
The project is expected to cost $4.7 million.
An average of 947 vehicles use the bridge daily, with 2% truck traffic.
When construction is complete, a Muckleshoot artist will be creating an art piece consisting of images portrayed on vanes produced by the King County Sign Shop.
