Orion Marine Group, Inc. operates as a marine specialty contractor serving the heavy civil marine infrastructure market. The company provides a range of marine construction and specialty services on, over, and under the water along the Gulf Coast, the Atlantic Seaboard, and the Caribbean Basin, as well as the Pacific Northwest. The companys marine construction services include construction of marine transportation facilities, marine pipelines, bridges and causeways, and marine environmental structures. Its marine transportation facility construction projects comprise public port facilities for container ship loading and unloading; cruise ship port facilities; private terminals; recreational use marinas and docks; and other marine-based facilities. Orion Marine Groups 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. Its bridge and causeway projects include the construction, repair, and maintenance of bridges and causeways, as well as the development of fendering systems in marine environments; and marine environmental structure projects primarily comprise the installation of concrete mattresses to ensure erosion protection, and the installation of geotubes for wetlands and island creation. In addition, the company offers dredging services; specialty services, including salvage, demolition, surveying, towing, diving and underwater inspection, excavation, and repair; diving services; and survey services, including surveying pipelines and performing hydrographic surveys. Its customers include federal, state, and local governmental agencies, as well as private commercial and industrial enterprises. The company was founded in 1994 and is headquartered in Houston, Texas.