Great Lakes Dredge & Dock Corporation (Great Lakes) is a provider of dredging services in the United States. Great Lakes provides dredging services in the East, West, and Gulf Coasts of the United States and worldwide. The Company has a 50% interest in Amboy Aggregates (Amboy), a sand dredging operation in New Jersey and a 50% interest in TerraSea Environmental Solutions, (TerraSea) an environmental remediation services business. The Company operates in two segments: dredging and demolition. In April 2014, the Company announced that it has completed the sale of NASDI, LLC and Yankee Environmental Services, LLC, its two subsidiaries that comprise the historical demolition business, to a privately owned demolition company located in the Midwest.