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A COALBURG TUG AND EIGHT COAL BARGES GO DOWNSTREAM THROUGH THE LONDON LOCKS ONE OF THREE LOCKS SYSTEMS ON THE... NARA .tif Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Schaefer Harry Photographer File ACOALBURGTUGANDEIGHTCOALBARGESGODOWNSTREAMTHROUGHTHELONDONLOCKS ONEOFTHREELOCKSSYSTEMSONTHE