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Orion Group Holdings, Inc., a leading specialty construction company, provides services both on and off the water in the continental United States, Alaska, Canada and the Caribbean Basin through its heavy civil marine construction segment and its commercial concrete segment. The Company鈥檚 heavy civil marine construction segment services includes marine transportation, facility construction…More, marine pipeline construction, marine environmental structures, dredging of waterways, channels and ports, environmental dredging, design, and specialty services.