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Latitude: 37.76297 ; Longitude: -122.379631 Donor's metadata notes: Bart Construction, Bethlehem Shipyard (near today's Crane Cove Park), Transbay Tube construction. Concrete worker on top of tube section, downtown skyline in the background. Concrete loaded into the tubes on docks at the far east end of the shipyard that may no longer exist. 300 20th St., 94107