Bridges in unincorporated King County
Baring Bridge, Skykomish, WA.
The King County Department of Local Services, Road Services Division owns and maintains 185 bridges in the unincorporated area of King County. Built over many generations, these bridges range from less than 10 years to over 100 years in age. These bridges are an integral part of a road system that supports more than one million vehicle trips every day.
Bridge load limits and permits
Learn about bridge load limits in unincorporated King County and the overlegal permit application process.
Bridge washing
Find out about bridges that will be cleaned by King County in 2024, as a part of preventative maintenance efforts.
Bridges with weight restrictions
Access the latest updates on bridges with weight restrictions and find links to complete lists of bridges with vehicle weight, height, speed and other restrictions.
Ames Lake Bridge
This project replaces the 97-year-old Ames Lake Bridge with a wider structure and straighter bridge approaches.
Baring Bridge
King County will replace the existing timber bridge with a wider, steel truss bridge., which will be open to all vehicles and carry no weight restrictions.
Boise X Connection Bridge
Boise X Connection Bridge
Bridge Washing
Bridge Washing in Unincorporated King County
Duvall Slough Bridge
More than 10,000 vehicles cross the Duvall Slough Bridge on NE Woodinville-Duvall Road every day. The concrete driving surface is now too damaged to rely on short-term repairs.
Fifteen Mile Creek Bridge
This project replaces the Fifteen Mile Creek Bridge, which is past its useful life. The new bridge will be designed to meet current national bridge standards.
South Park Bridge
The South Park Bridge on 14th Avenue S/16th Avenue S spans the Duwamish waterway. The structure is a bascule, or drawbridge, with two moveable leaves forming the main span so the bridge can be opened for marine traffic below.
Historic Bridges of King County by Eduardo Calderón
Frequently asked questions
To request the schedule for bridge maintenance, please contact the Road Services Division's Engineering Services Section by email.