YESLER BRIDGE REHABILITATION PROJECT, YESLER WAY OVER 4TH AVENUE S.
IMCO rehabilitated the historic Yesler Bridge in downtown Seattle, removing the existing bridge and constructing a new pier foundation and abutment (to support the lateral pressure of an arch or span at the ends of a bridge). IMCO performed rehabilitation of the existing abutment and historic elements, building a new steel girder bridge, and making improvements to sidewalks, roadway surfaces, and existing railings for improved pedestrian and traffic safety. Historical elements such as decorative pedestrian railings, fascia girders, girder columns and cladding, and ornamental capitals and corbels, were carefully removed, rehabilitated and re-incorporated into the new construction to ensure that the key historical features of the bridge were preserved.
The bridge connects the east and west arterial across I-5 and is a vital route for residents, commuters, and workers. Yesler Way and Terrace Street were closed during the life of the project, but vehicle and pedestrian traffic on 4th Avenue had to be maintained, and access to existing buildings located near the work area had to be maintained. This project required tough scheduling and work in tight work areas, while keeping existing facilities operating during construction.