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 in the U.S. involves a number of federal authorities. The responsibilities of the agency is split into two categories: (1) oil spill anticipation and prevention and (2) oil spill response and cleanup. The single most important authority governing oil spills in the United States is the Federal government. The federal government has jurisdiction over oil responses and oil spills that occur in state and federal navigable waters alike. The location of the Oil spill determines which authority responds. Oil spills that occur in coastal waters are the responsibility of the United States Coast Guard (USCG) while the Environmental Protection Agency