SR 518/24th Avenue S Bridge - Girder Replacement - Complete November 2023

Project overview

During summer 2023, our contractor crews replaced the damaged girder on the 24th Avenue South bridge over SR 518 near the Sea-Tac International Airport. Crews also made bridge drain and drainpipe improvements in the area.

Timeline

Summer to Fall 2023

Project status

Completed

Funding

$2.3 Million

What to expect

The 24th Avenue South bridge reopened to traffic on Wednesday, Nov. 1, and major construction for this project is complete.

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New girder installed on 24th Avenue South bridge over State Route 518 in SeaTac.

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A girder on the 24th Avenue South bridge over State Route 518 in SeaTac was replaced after it was struck by an over-height vehicle.

History and background

In 2020, the 24th Street bridge over State Route 518 (milepost 1.44 to 1.46) was struck by an over-height vehicle, causing severe damage to one of the girders over the eastbound lanes. The girder was moved more than a half inch to the east and suffered a crack.

The girder had to be replaced, which required the closure of SR 518 to demolish the old girder and place a new one.

The bridge serves as an artery to and from Sea-Tac International Airport for airport-related businesses located north of SR 518 and for a large Port of Seattle employee parking lot.

Milestone

2020

24th Street bridge over SR 518 struck

Dec. 7, 2022

Advertised for competitive bidding

Dec. 28, 2022

Contract awarded to Karemer North America, LLC

Summer 2023

Construction began

November 2023

Construction completed

SR 518/24th Avenue S Bridge - Girder Replacement - Complete November 2023

Project overview

What to expect

History and background

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