USGS Pacific Coastal and Marine Science Center
Pacific Coastal and Marine Science Center

Fate of Dredge Disposal Material and Polluted Sediment, Offshore Honolulu, Hawaii

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Map of Mamala Bay Disposal Area

Mamala Bay has been used as a repository of dredged material for over a century. This map shows the location of the past and present disposal sites. The sites are overlain on a backscatter image, with water depth contours shown in red. Note the lighter high-backscatter areas in and around the disposal sites that mark the location of dredged material deposits. The small circular features areas around the periphery of the disposal sites are interpreted to mark the location of individual disposal events. The lighter-toned seafloor area in the lower left corner of the image is a submerged reef composed of outcropping limestone.


Map of Mamala Bay disposal area

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For more information, please contact:
Mike Torresan

U.S. Geological Survey
2885 Mission Street
Santa Cruz, CA 95060

U.S. Department of the Interior | U.S. Geological Survey
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Content last modified in ~2000