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Sequence on construction operations at Eisenhower Lock. Sequence on Iroquois control dam and construction. Several shots of trailer camp for seaway construction workers at Massena, New York. CS of blasting signal. Several LSs, MSs and CSs of Long Sault Rapids before seaway construction, MSs of canallers in foreground on old canal. Sequence on causeway construction operations, dumping rock and gravel on rapids to stop up flow of water.