September 6, 2001, San Francisco, California
The Post Conference technical tour will begin at 8 am and visit some of the very interesting sites along the San Francisco waterfront. Descriptions of the sites are given below. These have been especially selected because they have been enjoyed by previous visitors to San Francisco. The tour will return from the Bay Model via a ferry ride across San Francisco Bay. Prof. Robert L. Wiegel, University of California, Berkeley, will narrate the tour with George Domurat, Corps of Engineers and Lesley Ewing, California Coastal Commission.
OCEAN BEACH
- The O'Shaughnessy Seawall
The massive O'Shaughnessy Seawall is a conctete, combination curved-faced and stepped seawall built in 1929 backing Ocean Beach in San Francisco. The wall is founded on piles and interlocking sheetpile. The lower steps were buried below the original beach face to minimize the risk that the toe of the seawall would be exposed. To replace it today would cost $5,000 or more per linear foot.
OCEAN BEACH – The Great
Highway Seawall
The 3,100-foot Great Highway Seawall, modeled after the O'Shaughnessy wall and built just downcoast on Ocean Beach in the early 1990s, cost $4,700-$8,000 a foot, depending on how much was built at one time, with the smallest (120 feet) section being the most expensive. Newer structures have cost $1,000-$3,000 per foot, or $5-$15 million per mile - considerably less than the O'Shaughnessy Wall, but their design and materials differ.
