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ID
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J-1-99-SF
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Abstract
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Chief Scientists: John Chin, Paul Carlson. Seismic and
Sidescan Sonar and Video data (Geopulse, sidescansonar,
underwatertelevision, underwatercamera) of field activity
J-1-99-SF in Central San Francisco Bay, CA from 01/11/1999 to
01/20/1999
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Project/Theme
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Applied Sediment Transport
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| National Plan
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Environment
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Chief Scientist
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John Chin
Paul Carlson
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Activity Type
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Seismic and Sidescan Sonar and Video
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Platform
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David Johnston
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Area of Operation
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Central San Francisco Bay, CA, San Francisco Bay, CA
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Bounding Coordinates
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37.92942
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-122.47744 -122.19342 |
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37.50867 |
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Dates
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01/11/1999 (JD 011) to 01/20/1999 (JD 020)
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Analog Materials
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list
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Crew
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John Chin
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Chief Scientist, USGS Western Region
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Paul Carlson
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Chief Scientist, USGS Western Region
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Mike Boyle
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Electronic Tech, USGS Western Region
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Hank Chezar
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Video Specialist, USGS Western Region
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Gordon Smith
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Captain, UCSC
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Equipment Used
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Geopulse
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sidescansonar
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underwatertelevision
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underwatercamera
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Purpose
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Obtain acoustic & video imagery of sand shoal regions and rock pinnacles
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Information to be Derived
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Morphology of the sand waves and shoals and of the rock pinnacles and
surrounding sediments.
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Summary
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Good imagery across sand waves, dredge area and hazardous rock pinnacles.
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Notes
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San Francisco Bay Pollutant and Sediment Transport.
From "Western Region coastal and Marine Geology Bulletin",
Publisher: Mike Carr, Editor: Anne Gartner, February 12, 1999:
CRUISE NEWS: R/V DAVID JOHNSTON
In mid-January 1999, the David Johnston returned to central San
Francisco Bay for follow-up studies of three bedrock knobs that
rise above the unconsolidated sediment to water depths of <39'
(LLW).
The rocks are within the general westbound traffic zone and about
200 m from the Deep Water Traffic Lane where oil tankers and cargo
vessels with drafts of 50' routinely enter the bay; thus a
potential catastrophe awaits.
The rocks have been lowered by blasting in the past (late 1800s and
early 1900s) and the Harbor Safety committee is meeting frequently
to determine how to tackle this problem under present rules and
regulations.
At their invitation, John Chin and Paul Carlson have attended
several of the meetings.
We (Mike Boyle, Paul Carlson, John Chin, and boat skipper Gordon
Smith) ran very successful hi-res seismic lines and a few side-scan
sonar lines across the rocks and over some of the sand shoal areas.
Hank Chezar joined us for one day and we obtained some good video
over two of the rocks and over one of the sand shoals.
Fortunately, we had our camera deployment before the rains came to
muddy up the water.
The accompanying photo shows Hank testing the camera system before
we left Pier 39 in San Francisco.
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Got Help?
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For J-1-99-SF, we would appreciate any information on -- contract, days at sea, dive count, funding, information specialist, kms of navigation, NGDC Info, organization, owner, ports, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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