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I-90 - WB East Channel Bridge Expansion Joint Repair - complete August 2014

Project Status - Complete
Project map of the work area and location.
View a larger version of the project area

An image of the new expansion joints for the westbound I-90 East Channel Bridge near Mercer Island.
The new expansion joints waiting for installation.

A damaged expansion joint on westbound I-90 East Channel Bridge.
The old expansion joints were broken and leaking.

See more photos of the expansion joints and the work to replace them on the WSDOT Flickr website.

In July 2014, we replaced two 33-year old expansion joints on the westbound I-90 East Channel Bridge between Bellevue Way S.E. and Mercer Island. The expansion joints had deteriorated and outlived their useful lifespan.

Contractor crews replaced the old joints with stronger, 92-foot long expansion joints. The expansion joints along the I-90 pedestrian/bike trail were also replaced.

How You Benefit
Cross GlyphImproves Safety
Expansion joints are critical to the safe operation of a bridge. They allow the structure to bend and flex with changing temperatures and traffic loads. The expansion joints help maintain the bridge's structural integrity and keep drivers safe.
Leaf Glyph Protects Environment
The old expansion joints had begun leaking due to broken rubber seals. The new expansion joints will help prevent roadway stormwater run-off from leaking through and possibly entering Lake Washington.
Dollar Sign Glyph Economic Incentive
The new expansion joints are expected to last the remaining lifespan of the bridge. The expansion joints will require less maintenance, reduce the need for costly repairs and keep commuters and freight moving on this important corridor.

Partnerships & Cooperation
WSDOT worked closely with the cities of Bellevue and Mercer Island to coordinate the work and the week-long closure of all but two westbound lanes on I-90 to install the expansion joints.

Drivers who use the corridor daily played a critical role in reducing the congestion during the closure. Many worked from home, scheduled vacation time, used alternate routes or found innovative ways to commute , including by boat and bike, in order to reduce the number of vehicles on I-90.


Financial Data for PIN 109045D
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $1,676
Total $1,676

Contact Us
Northwest Region Communications
15700 Dayton Avenue North
Seattle, WA 98133

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