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Keywords:
REEFS,
ROCKS,
SUBMERGED,
BLASTING,
DRILLING,
REMOVAL,
SURFACE,
EXPLOSIVES,
GALLERIES,
CHANNELS,
NAVIGATION,
IMPROVEMENT,
UNDERWATER,
OPERATION,
DYNAMITE,
EXPLOSIONS,
WORKS,
NEW YORK,
HALLETTS POINT,
HELL GATE,
USA,
UNITED STATES
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© Thomas Telford and ICE
1886
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