 Even in deep water, commercial activities such as pipe-laying operations and deep sea trawling can place a wreck at risk.Such a wreck is the "Mardi Gras" shipwreck sunk in the Gulf of Mexico in 4,000 feet (1220 meters) of water.The shipwreck lay forgotten at the bottom of the sea until it was discovered in 2002 by an oilfield inspection crew working for the Okeanos Gas Gathering Company (OGGC).