Great Lakes Dredge & Dock Corporation announced the signing of the first ever subcontract for procurement of rock for a U.S. offshore wind farm with Carver Sand & Gravel LLC ("Carver"), a U.S. quarry in the state of New York. Through this subcontract, Great Lakes will use rock produced in the State of New York to provide scour protection for offshore wind turbine foundations, and substations at Equinor and bp's Empire Wind I and Empire Wind II wind farms. The rock will be quarried locally, transported to the quayside on the Hudson River, and loaded onto Great Lakes' rock installation vessel, the Acadia, which will sail to the wind farms to install the rock starting in 2025. Great Lakes and Carver will be developing the first U.S. rock supply chain for offshore wind, including the quarry producing the rock, the stockpiling and transportation of the rock to the quayside, the port and loading facilities that will load the rock installation vessel, and other facilities along the Hudson River that will help guide the vessel in the riverway.

The CompanyGreat Lakes Dredge & dock Corporation is the largest provider of dredging services in the United States. In addition, Great Lakes is fully engaged in expanding its core business into the rapidly developing offshore wind energy industry. The Company has a long history of performing significant international projects.

The Company employs experienced civil, ocean and mechanical engineering staff in its estimating, production and project management functions. In its over 133- year history, the Company has never failed to complete a marine project. Great Lakes owns and operates the largest and most diverse fleet in the U.S. dredging industry, comprised of approximately 200 specialized vessels.

Great Lakes has a disciplined training program for engineers that ensures experienced-based performance as they advance through Company operations. The Company's Incident-and Injury-Free(R) (IIF(R) safety management program is integrated into all aspects of the Company's culture. The Company's commitment to the IIF(R) culture promotes a work environment where employee safety is paramount.

About Empire Wind Empire Wind is being developed through a 50-50 joint venture between Equinor and bp. Empire Wind is located 15-30 miles southeast of Long Island and spans 80,000 acres, with water depths of between approximately 75 and 135 feet. The lease was acquired in 2017.

The project's two phases, Empire Wind 1 and 2, have a total installed capacity of more than 2 GW (816 + 1,260 MW).