USGS Western Coastal and Marine Geology
Pacific Coastal & Marine Science Center

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

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Close-up Of The Dredge Disposal Site, Mamala Bay

Close-up view of the dredge and construction material disposal site (A) in Mamala Bay. The site has a high backscatter pattern from coalescing of numerous individual disposal operations. At the periphery of the disposal site are numerous individual high backscatter patches (B), each interpreted as the result of a single dump. Water depth is about 450m in the site. Note the large bedforms (C) and moats around individual outcrop blocks (D), both indicating strong bottom currents. The scale across the bottom of the image is appx 3 km. The vertical exaggeration is 5x.

Disposal Area


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For more information, please contact:
Michael E. Torresan

U.S. Geological Survey
345 Middlefield Road MS 999
Menlo Park, CA 94025

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U.S. Department of the Interior | U.S. Geological Survey | Western Coastal & Marine Geology
Maintained by Laura Zink Torresan
Last modified 11 October 2005 (lzt)