Efforts to stem the Deepwater Horizon oil spill Efforts to stem the Deepwater Horizon oil spill Efforts to stem the "Deepwater Horizon" oil spill were ongoing from the time that the "Deepwater Horizon" exploded on 4/20/2010 until the well was sealed by a cap on July 15, 2010. Various species of dolphins and other mammals (61 casualties), birds (2,095 casualties), and the endangered sea turtles (467 casualties) have been killed either directly or indirectly by the oil spill. The "Deepwater Horizon" spill has surpassed in volume the 1989 "Exxon Valdez" oil spill as the largest ever to originate in U.S.-controlled waters; it is comparable to the 1979 Ixtoc
2011 Bohai Bay oil spill 2011 Bohai Bay oil spill The 2011 Bohai bay oil spill () was a series of oil spills that began on June 4, 2011 at Bohai Bay. The spill itself however was not publicly disclosed until a month later. There were suspicions of official cover-ups by the State Oceanic Administration (SOA). The oil field is 51% owned by China National Offshore Oil Corporation, and 49% owned by the United States company ConocoPhillips. On June 4, 2011 the Penglai 19-3 oilfield caused an oil spill from a sea floor leak that lasted until June 7. On June 17 a second oil