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A pump blows air into the riverbed to loosen the sand and gravel so the dredge can work through it later. Picture

A pump blows air into the riverbed to loosen the sand and gravel so the dredge can work through it later.

A pump blows air into the riverbed to loosen the sand and gravel so the dredge can work through it later.

Photo Location: Alaska, Juneau
Photo Date: 1999

Author: NOAA Auk Bay Lab, K Koski/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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1172 x 1764 433.64 KB
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Added On
19th October 2015
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