Great Lakes Dredge & Dock Corporation engages in the business of marine construction, primarily dredging, and commercial and industrial demolition primarily in the east, west, and Gulf Coasts of the United States. The company’s Dredging segment is involved in capital dredging projects consisting of primarily port expansion projects, land reclamations, trench digging for pipelines, tunnels and cables, and other dredging related to the construction of breakwaters, jetties, and canals; beach nourishment projects, which involve moving sand from the ocean floor to shoreline locations; and maintenance dredging that includes the 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. Its Demolition segment provides commercial and industrial demolition services. It is involved in exterior demolition that comprises dismantling and demolition of structures and foundations; and interior demolition, which includes removing specific structures within a building. This segment also engages in site development, removal of asbestos and other hazardous materials, and remediation of contaminated demolition materials. The company serves federal, state, and local governments; foreign governments; domestic and foreign private concerns, such as utilities and oil companies; general contractors; corporations that commission projects; nonprofit institutions, such as universities and hospitals; and local government and municipal agencies. It has a fleet of 33 dredges, including 8 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 1809 and is headquartered in Oak Brook, Illinois.