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Great Lakes Dredge & Dock Corporation, together with its subsidiaries, engages in the business of marine construction, primarily dredging, and commercial and industrial demolition in the United States and internationally. The company's Dredging segment is involved in capital dredging projects consisting of port expansion projects, land reclamations, trench digging for pipelines, tunnels and cables, and other dredging related to the construction of breakwaters, jetties, canals, and other marine structures. It also engages in coastal protection projects, which involve moving sand from the ocean floor to shoreline locations; and re-dredging of previously deepened waterways and harbors to remove silt, sand, and other accumulated sediments, as well as lake and river dredging, inland levee and construction dredging, environmental restoration and habitat improvement, and other marine construction projects. This segment serves federal, state, and local governments; foreign governments; and domestic and foreign private concerns, such as utilities and oil companies. The company's Demolition segment provides commercial and industrial demolition services, such as interior and exterior demolition for site preparation, as well as environmental remediation services, which include the removal of asbestos and other hazardous materials. This segment serves general contractors; corporations that commission projects; nonprofit institutions, such as universities and hospitals; and local government and municipal agencies. Great Lakes Dredge & Dock Corporation operates a fleet of 33 dredges, including 9 deployed internationally; 19 material transportation barges; 2 drill boats; and various other specialized support vessels. The company was formerly known as Lydon & Drews Partnership and changed its name to Great Lakes Dredge & Dock Corporation in 1905. The company was founded in 1890 and is headquartered in Oak Brook, Illinois.