U.S. Geological Survey
Open-File Report 98-139
Version 1.0

Multibeam Data and Socio-Economic Issues in West-Central San Francisco Bay

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Reconstruction of San Francisco Bay Floor as of 19?? (date unknown)

This is a computer simulation of the bay floor over the dump site (yellow circle) south of Alcatraz Island when it was partially filled. The vertical exaggeration of the island is 2x and of the submerged features is 10x. The gray mesh is 300 x 300 feet (91 meters).

• Alcatraz Dump Site, present-day (120 kb)
• Alcatraz Dump Site, 19?? (computer-generated) (110 kb)
• Alcatraz Dump Site, 1894--prior to dumping (100 kb)
• Profile of sediment accumulation at Alcatraz disposal site (51 kb)

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