“Minor” delays to affect SR 410 traffic on Aug. 18
Published 1:30 pm Thursday, July 30, 2026
There will be some delays on SR 410 between Enumclaw and Buckley on Aug. 18 as King County crews move in materials to finish construction of the new Boise X Connection Bridge.
According to the county, girders for the bridge are expected to be delivered that day, necessitating intermittent traffic stops at the SE Mud Mountain Road intersection.
The county said the delays should be “minor.”
The bridge closed June 1 for construction, and is expected to reopen near November.
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.
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.
