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 Little Buffalo oil spill dangerous chemicals. According to Alberta Environment spokesman Trevor Gemmell, the spill was contained in stands of stagnant water and was 300 metres from any flowing water. Within two weeks, the company had cleaned up about 33 per cent of the oil, the oil pooled on top of the open water. However, it was estimated that it would take six months to recover most of the oil, including that which had soaked into the vegetation. Everyone involved admitted that restoring it fully was out of the question. The ERCB is the agency responsible for determining the cause of the leak. According