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
Oil spill governance in the United States covers inland oil spills. It is required by US federal law that any discharge of oil that creates a film or sheen on the water surface be reported to the National Response Centre. The National Response Centre then dissipates information to the USCG who acts as the federal on-scene coordinator. The USCG are the primary federal response authority in coastal water hence having the overall power to ensure the effective cleanup of oil spills and lead actions that prevent further discharge from the spill source. The resulting activities that follow up an oil spill involving federal, state and private parties