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R J MacIsaac Construction Ltd. is a well-respected, innovative contractor specializing in marine construction for 38 years, successfully completing numerous commercial, industrial and residential projects. We handle all types of projects including marine and land based dredging, armour stone breakwaters, excavation, demolition, tug, barge and scow work, sub-sea pipelines & cables and underwater drilling & blasting. We also offer tug and barge rentals.