Great Lakes Dredge and Dock Company (GLDD) paid $969,000 for damage to seagrass and other resources in the Florida Keys National Marine Sanctuary. In May 1993, four tug boats owned by GLDD and another company were transporting heavy dredging equipment and dredge pipes from the Boca Grande Channel off Florida’s west coast to Green Cove Spring on the east coast. Before the flotilla reached Seven Mile Bridge off Marathon, Florida, one or more of the dredge pipes being towed by one of the tugs came loose and dragged across the bottom of Florida Bay, causing a scar 13 miles long and destroying nearly 200,000 square feet of seagrass and other sanctuary resources. The dragging pipe caused the tug to slow and another tug attempted to pass her. The other vessel ran aground, creating a massive hole and destroying more than 80,000 square feet of seagrass and coral at an area called Red Bay Banks off Marathon.