III. Oakland

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18. Aerial view of collapsed sections of the Cypress viaduct of Interstate Highway 880. [H.G. Wilshire, U.S. Geological Survey]

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19. Aerial view of collapsed sections of the Cypress viaduct of Interstate Highway 880. [H.G. Wilshire, U.S. Geological Survey]

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20. Reinforcement bars exposed at the base of the Cypress viaduct near 14th Street. [J.K. Nakata, U.S. Geological Survey]

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21. Remnant portion of the north- and south-bound Cypress viaduct exposing box girders near 14th Street. [J.K. Nakata, U.S. Geological Survey]

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22. Side view of support-column failure and collapsed upper deck, Cypress viaduct. [H.G. Wilshire, U.S. Geological Survey]

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23. Support-column failure and collapsed upper deck, Cypress viaduct. [H.G. Wilshire, U.S. Geological Survey]

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24. Bent reinforcement bars in failed support column, Cypress viaduct. [H.G. Wilshire, U.S. Geological Survey]

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25. Closeup of damaged reinforcement bars from a Cypruss viaduct support column. [H.G. Wilshire, U.S. Geological Survey]

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26. Pancaked upper deck, Cypress viaduct. Guard rail at right is on lower deck. [H.G. Wilshire, U.S. Geological Survey]

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27. Sheared reinforcement bar, Cypress viaduct. [H.G. Wilshire, U.S. Geological Survey]

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28. Temporary support structures emplaced to prevent further collapse, Cypress viaduct. [H.G. Wilshire, U.S. Geological Survey]

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29. Demolition of Cypress structure near 14th Street. [J.K. Nakata, U.S. Geological Survey]

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30. A downtown building at the corner of Alice and 13th Streets lost part of its unreinforced facade and brick masonry. [J.K. Nakata, U.S. Geological Survey]