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Orion Marine Group, Inc. operates as a marine specialty contractor serving the heavy civil marine infrastructure market. The company provides marine construction and specialty services on, over, and under the water along the Gulf Coast, the Atlantic Seaboard, the West Coast, Alaska, and Canada, as well as the Caribbean Basin, the Middle East, and Australia. Its marine construction services include construction of marine transportation facilities, marine pipelines, bridges and causeways, and marine environmental structures. The company's marine transportation facility construction projects comprise public port facilities for container ship loading and unloading, cruise ship port facilities, private terminals, special-use Navy terminals, recreational use marinas and docks, and other marine-based facilities. Its marine pipeline service projects consist of the installation and removal of underwater buried pipeline transmission lines; installation of pipeline intakes and outfalls for industrial facilities; construction of pipeline outfalls for wastewater and industrial discharges; river crossing and directional drilling; and creation of hot taps and tie-ins, as well as inspection, maintenance, and repair services. The company's bridge and causeway projects include the construction, repair, and maintenance of overwater bridges and causeways; and marine environmental structure projects primarily comprise the installation of concrete mattresses to promote erosion protection, construction of levees to contain environmental mitigation projects, and the installation of geotubes for wetlands and island creation. In addition, it offers dredging services; and specialty services, including salvage, demolition, surveying, towing, diving and underwater inspection, excavation, and repair. The company serves federal, state, and municipal governments, as well as private commercial and industrial enterprises. The company was founded in 1994 and is headquartered in Houston, Texas.