• Project

SR 433 Lewis and Clark Bridge Finger Joint Replacement Project

Project overview

In 2023, the Lewis and Clark Bridge, also known as the Rainier Bridge, will fully close for six days as crews replace two bridge expansion joints, one joint on the north end of the bridge and one on the south.

Steel expansion joints allow the structure to expand and contract with daily temperature variations. These two expansion joints have deteriorated and need to be replaced. This repair project will help preserve the bridge and extend its service life.

During the closure, all vehicle traffic crossing The Columbia River will detour to use either the Astoria-Megler Bridge between Megler, WA and Astoria, OR, or the Interstate 5 Bridge between Vancouver, WA and Portland, OR. Pedestrians, bicyclists, those using wheelchairs/mobility scooters and emergency vehicles will be provided access across the bridge during the full closure.

While construction is not scheduled to begin until 2023, we are proactively planning for impacts to business, commuters, and freight haulers. The Lewis and Clark bridge is currently in working condition and safe for all travelers.

Summer 2022-Spring/Summer 2023
Project status
$1 Million
Project hotline

What to expect

Construction will start in 2023. Once a contractor is selected, we will know the construction schedule and bridge closure dates. We will share more information, including exact dates of total closure, in early 2023.

While the heaviest impacts to travelers will occur during the full closure of the bridge, travelers should prepare for up to two months of traffic impacts.

During construction, expect longer delays and congestion whether you commute over the bridge or travel in the project area. The work zone will have reduced speed limits for the safety of travelers and the construction crew. Emergency services will be able to cross the bridge during the full closure within a coordinated response time at low speeds.

Full closure for six days

To replace these expansion joints, the bridge must be fully closed to vehicle traffic for up to six days to allow the concrete adjacent to the new expansion joints to fully cure. Pedestrians, bicyclists, wheelchair/mobility scooter users and emergency vehicles will be provided access across the bridge during the full closure.

Nighttime single lane closures

Before and after the full bridge closure, there will be nightly single lane closures for additional joint work, project staging, and clean-up. This will leave only one lane open for both northbound and southbound traffic to share each evening.

Northbound and southbound traffic will take turns alternating through the single lane, waiting until the oncoming vehicle passes, before proceeding. Occasional daytime single lane closures may be needed but will be limited to reduce congestion throughout the region.

Pedestrian, cyclists and people who use wheelchairs/mobility scooters

People who walk, bike or roll can cross the bridge during the full closure of the bridge. 

Ferry service

During the full bridge closure, the Wahkiakum County Ferry between Cathlamet, WA and Westport, OR will run twice an hour all day. Find more information about the Wahkiakum County Ferry here.

In 2023, The Lewis and Clark Bridge, which spans across The Columbia River between Washington and Oregon, will close for six days for bridge joint replacement work.