Volume and extent of the Deepwater Horizon oil spill Volume and extent of the Deepwater Horizon oil spill The "Deepwater Horizon" oil spill was discovered on the afternoon of 22 April 2010 when a large oil slick began to spread at the former rig site. According to the Flow Rate Technical Group, the leak amounted to about of oil, exceeding the 1989 "Exxon Valdez" oil spill as the largest ever to originate in U.S.-controlled waters and the 1979 Ixtoc I oil spill as the largest spill in the Gulf of Mexico. BP has challenged this calculation saying that it is overestimated as it includes over of oil which was
1989 Narragansett Bay oil spill 1989 Narragansett Bay oil spill On June 23, 1989, several hundred thousand gallons of fuel oil were spilled at the mouth of the Narragansett Bay in Rhode Island after the tanker MV "World Prodigy" ran aground on a reef near Aquidneck Island. "World Prodigy", a long ship operated by Ballard Shipping under the Greek flag, was inbound to Providence and Tiverton, Rhode Island when at about 16:40 local time she ran aground on Brenton Reef, about offshore from Brenton Point State Park, after passing the wrong side of a buoy marking the channel. She had a cargo of about 8.1