The San Francisco-Oakland East Span Seismic Safety Project was recently named a 2015 Public Works Project of the Year by the American Public Works Association (APWA). The APWA Public Works Projects of the Year awards are presented annually to promote excellence in the management and administration of public works projects, recognizing the alliance between the managing agency, contractor, consultant and their cooperative achievements. This year, the project team of winners includes the California Department of Transportation, Bay Area Toll Authority and the California Transportation Commission as the managing agencies; the American Bridge/Fluor Enterprises, Kiewit/FCI/Manson, MCM Construction, Inc., FlatIron West, Inc., California Engineering Contractors, Inc., and Silverado Contractors, Inc., as the primary contractors; and T.Y. Lin International/Moffatt & Nichol, as the primary consultants, were presented with the award during APWA’s 2015 International Public Works Congress & Exposition Awards Ceremony in Phoenix, Arizona held August 30-September 2, 2015.
APWA selected Projects of the Year awards in five categories: Disaster/Emergency, Environment, Historical Restoration, Structures and Transportation. The San Francisco-Oakland East Span Seismic Safety Project was awarded as the APWA Project of the Year in the Transportation category at a cost greater than $75 million. The project is California’s largest public works project to date, and marks the transformation of the Bay Area bridge into a global icon.
The San Francisco-Oakland East Span Seismic Safety Project resulted after the 1989 Loma Prieta earthquake caused a section of the upper deck of the original East Span of the bridge to collapse onto the lower deck. At that time, it was determined that replacing the seismically-vulnerable bridge was the safest, most cost- effective option. T.Y. Lin International/Moffatt & Nichol’s design teams delivered a comprehensive strategy that focused on setting and delivering the highest standards for seismic safety, and also respecting the functional and aesthetic requirements of the local communities.
The new East Span of the Bay Bridge is a landmark structure and the latest in bridge design and seismic engineering technologies that is located in a high seismic zone, situated between two major faults capable of large earthquakes. At 2,047 feet long and 258.33 feet wide, the new East Span is the longest single-tower Self- Anchored Suspension (SAS) Span bridge in the world. The new seismic engineering advancements incorporate the SAS’s single tower that consists of four steel legs connected by fusible shear link beams, and it is the first bridge of any kind to use fusible shear links in its tower to protect tower shafts during earthquakes. It is also the first bridge on this scale to use a single, pre-bent three-dimensional suspension cable. The deck sections are connected by hinge pipe beams that transfer bending and shear, while absorbing seismic energy and protecting the main structure. The gigantic steel pipe piles for the foundations were driven up to 300 feet below the surface of the bay to reach stable soils.
The San Francisco-Oakland Bay Bridge East Span opened on September 2, 2013.
For more information on the APWA 2015 Projects of the Year, contact APWA Media Relations/Communications Manager, Laura Bynum, email@example.com, or call 202.218.6736.