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.