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
Prudhoe Bay oil spill 6 inch layer of chunks of live, frozen tundra that were taken from a donor site and transplanted to the spill site Government environmental officials said it could take up to a decade for the tundra vegetation to return to normal. BP decommissioned the entire 34-inch transit line and replaced it with a 20-inch line, containing pig launch and recovery sites. The Alaska oil spill had a major impact on BP as it was a loss to its image as well as a financial loss. On March 15, the U.S. Transportation Department ordered BP to test its three low-pressure lines