Expansion joints can be constructed in different ways under state design standards for bridges. Shown is a plate cover joint (left) on the Highway 99 George Washington Memorial Bridge over Lake Union in Seattle and a concrete header joint (right) on southbound I-5 at the Duwamish River in Tukwila. These are similar to two types of expansion joints now used on the U.S. 2 bridge over the Pilchuck River in Snohomish County. (WSDOT photos)

Expansion joints can be constructed in different ways under state design standards for bridges. Shown is a plate cover joint (left) on the Highway 99 George Washington Memorial Bridge over Lake Union in Seattle and a concrete header joint (right) on southbound I-5 at the Duwamish River in Tukwila. These are similar to two types of expansion joints now used on the U.S. 2 bridge over the Pilchuck River in Snohomish County. (WSDOT photos)

About expansion joint covers on US 2’s Pilchuck River Bridge

One lane has a reinforced concrete-type header instead of a plate. Both are used on other bridges.

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