when was the deepwater horizon oil spill capped
Deepwater Horizon oil spill Concerns were raised about the appearance of underwater, horizontally extended plumes of dissolved oil. Researchers concluded that deep plumes of dissolved oil and gas would likely remain confined to the northern Gulf of Mexico and that the peak impact on dissolved oxygen would be delayed and long lasting.[61] Two weeks after the wellhead was capped on 15 July 2010, the surface oil appeared to have dissipated, while an unknown amount of subsurface oil remained.[62] Estimates of the residual ranged from a 2010 NOAA report that claimed about half of the oil remained below the surface to independent estimates of up to 75%.[63][64][65]
Efforts to stem the Deepwater Horizon oil spill On September 10, Allen said the bottom kill could start sooner than expected because a "locking sleeve" could be used on top of the well to prevent excessive pressure from causing problems. BP said the relief well was about 50 feet (15Â m) from the intersection, and finishing the boring would take four more days.[51] On September 16, the relief well reached its destination and pumping of cement to seal the well began.[52] Officials said on September 18 that the cement pumped in from the base of the well had completed the sealing of the well.[53] On September 19, after pressure testing, Allen declared the well "officially dead".[54]
Deepwater Horizon oil spill Numerous investigations explored the causes of the explosion and record-setting spill. The U.S. government September 2011 report pointed to defective cement on the well, faulting mostly BP, but also rig operator Transocean and contractor Halliburton.[21][22] Earlier in 2011, a White House commission likewise blamed BP and its partners for a series of cost-cutting decisions and an inadequate safety system, but also concluded that the spill resulted from "systemic" root causes and "absent significant reform in both industry practices and government policies, might well recur".[23]
Dust Bowl This catastrophe intensified the economic impact of the Great Depression in the region.
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New France Thus, it extended from Newfoundland to the Canadian prairies and from Hudson Bay to the Gulf of Mexico, including all the Great Lakes of North America.