U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
The Golden Gate Bridge, owned and operated by the Golden Gate Highway and Transportation District, has been declared one of the seven engineering wonders of the United States by the American Society of Civil Engineering.
But this extremely important bridge, which carries 41 million vehicles per year, is situated near two major faults, the San Andreas and the Hayward, making it vulnerable to a major seismic event. A seismic retrofit project has been in the works for this bridge for nearly a decade. A four-year design study was underatken in the early 1990's to develop a retrofit design. The total cost of the design was $14.7 million, of which $5.9 million came from the Federal Highway Administration out of ISTEA legislation. The final design was completed in 1997 and in that same year the first of three retrofit phases began construction. TEA-21 authorized $25 million of HIgh Priority Projects funding and $22.5 million of Discretionary Bridge funding toward construction of the second phase of the retrofit project. Since the enactment of TEA-21, the District has received addtional Discretionary Bridge funding and, thus far, the total federal money allocated is approximately $65 million.
The three phases of the retrofit consist of:
Phase I is still under construction and Phase II went to bid on October 10, 2000.
More background and retrofit detail can be found at the Golden Gate Bridge's seismic retrofit summary page.