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February 2013

Continuing Innovation in Design-Build

View of where the new SR 520 floating bridge transitions to the fixed East Approach bridge.

The Design-Build Institute of America Northwest Region (DBIANW) will host a breakfast meeting on Wednesday, 13 March, at the Harbor Club in Seattle, Washington. DBIANW was chartered in 2002 by professionals representing all aspects of the design and construction industry in the Northwest. The organization supports and promotes the use of integrated design and construction for both public and private use.

Dolphin Berth Improvements at the Port of Everett

Points achieved in each Envision category for the Port of Everett, Dolphin Berth Improvement project.

To determine the level of sustainability achieved on a typical small capital improvement project, the Port of Everett tested the use of Envision, a new rating system and guidance manual to assess sustainable infrastructure. With assistance from BergerABAM, the designer of record, the project team applied the Envision system to the Port’s Dolphin Berth Improvement project at the 100 percent design phase.

The Problem with Engineering…

The 2013 commemorative poster for National Engineers Week.

…Is that without it, you wouldn’t have much of a life. It’s a branch of science that—like the medical field—is filled with people who enable you to do what you need to do to live your life in comfort and convenience. Without engineering, it would be harder to get to your job, harder to do your job, and harder simply to live.

Replacing a Deteriorating Bridge

The replacement bridge is nearly two times longer than its predecessor at 76 feet.

Built in 1962, the 240th Street SE Bridge over North Creek in Bothell, Washington, had a high propensity for flooding and displayed many signs of wear. Part way through the process of designing a replacement bridge, further inspection revealed advanced deterioration of the bridge’s timber foundation. Along with the ongoing scour action of the creek water further compromising the integrity of the structure, the City of Bothell was forced to immediately close the bridge to traffic.

As thousands of commuters use the city’s roadway systems that connect with the 240th Street SE Bridge, the City needed to act quickly with a replacement plan. During the emergency closure, the City and the design team mobilized to develop a new design strategy for the replacement bridge that could be fast-tracked: designed, permitted, and constructed a year ahead of schedule.