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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Cross-section of Accumulated Dredge Material near Alcatraz Island

This a north-south cross-section through Alcatraz Island the adjacent dump site. About 8.8 million cubic yards (6.7 million cubic meters) has accumulated in the area since 1894.

• 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)

Back to: Dredge Disposal, I  |  Dredge Disposal, II