Volume and extent of the Deepwater Horizon oil spill Gulf Coast that prevented vessels from coming within "of booming operations, boom, or oil spill response operations". In a press briefing, USCG admiral Thad Allen said the new regulation was related to safety issues. On CNN's "360", host Anderson Cooper rejected the motivation for the restrictions outright. The Civil Air Patrol also monitored the spill on behalf of the USCG. 27 May 2010 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
Volume and extent of the Deepwater Horizon oil spill collected before it could enter the Gulf waters. In its permit to drill the well, BP estimated the worst-case flow at . Immediately after the explosion the USCG did not estimate any oil leaking from the sunken rig or from the well. On 24 April, USCG Rear Admiral Mary Landry announced that a damaged wellhead was indeed leaking. She stated that "the leak was a new discovery but could have begun when the offshore platform sank . . . two days after the initial explosion." Initial estimates by USCG and BP officials, based on remotely operated vehicles as well as