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Olympic Region Bridge Cleaning Program

Agate Pass Bridge Map

Photo of the Agate Pass Bridge
Agate Pass Bridge. View larger maps.

Nisqually River Bridges on I-5 getting painted.

Nisqually River Bridge
Nisqually River Bridges re-painted
I-5 Nisqually River Bridges.

2018 Agate Pass Bridge work

The State Route 305 Agate Pass Bridge drivers can expect possible long delays while crews conduct maintenance on the bridge.

The bridge will be reduced to one alternating lane of traffic each day from Tuesday Feb. 20-Friday, March 2.

  • 8:45 a.m. to 3 p.m. weekdays
  • 7:45 a.m. to 2 p.m. Saturday and Sunday, Feb. 24-25

Cyclists and pedestrians
Accommodations will be made for cyclists who cross the bridge while work and lane restrictions are in progress. Pedestrians access will remain open during work activities.

Try transit
Commuters can help reduce congestion by taking transit.
Kitsap Transit

Jefferson Transit

Clallam Transit System

How will this bridge work affect the Cascade Bicycle Club Chilly Hilly Bicycle Ride?
The Sunday, Feb. 25 Chilly Hilly route does not cross the Agate Pass Bridge. Participants going to the event, however, could result in increased bicycle and vehicle traffic traveling across the bridge that day.

Why clean bridges?
WSDOT has the responsibility of maintaining bridges along our state highways. For the bridges to be thoroughly inspected, an equally thorough deep cleaning of the bridge deck and support areas is required. Cleaning the bridge improves the efficiency of WSDOT's rigorous bridge inspection program and is required by the Federal Highway Administration.

Why is work performed during the day and not at night?

In many cases, the bridge is being hand cleaned. Daylight is often necessary to ensure that the maneuvering of Under Bridge Inspection Trucks (UBITs) through steel truss members of a bridge is done so safely and accurately. Safety concerns for bridge maintenance crews, the traveling public, and limited workspace requires this work to be performed during daylight hours.   

The end result

The deep-cleaning, inspection and any subsequent repairs will ensure that bridges in the Olympic Region continue to function for all motorists. 

How many bridges are cleaned each year?

WSDOT crews have averaged nearly 30 bridges each year throughout the seven county Olympic Region. This includes the Agate Pass Bridge on SR 305, the Tacoma Narrows Bridge on SR 16 and the Nisqually River Bridges on Interstate 5.

WSDOT instituted and funded a bridge cleaning program to clean state-owned bridges prior to performing a bridge inspection. Bridge cleaning and inspection of state fracture-critical bridges began in January 2014. All of these bridges are regularly inspected and washed, and placed on an annual cleaning cycle.

How can I get more information?

Doug Adamson
WSDOT Olympic Region
(360) 357-2716