Complex Seismic Revamp

摘要

Contractors are almost complete with the second phase of a planned decade-long, $392-million effort to keep San Francisco's storied Golden Gate Bridge in place for future generations of span users and lovers. The complex seismic retrofit of the link to Marin County, Calif., is "a little like brain surgery," says Ewa Bauer, deputy district engineer for the Golden Gate Highway and Transportation District, the public agency that built the bridge in 1937, and now operates and maintains it. "We must modify the system but be cautious not to destroy the intricate structure already in place," she says.