Changes

{{CoalSwarm}}'''The Upper Big Branch mine disaster''' occurred on April 5, 2010 at [[Massey Energy]]'s [[Upper Big Branch Mine South|Upper Big Branch Mine]] at Montcoal in Raleigh County, West Virginia. (In 2011, Massey Energy was acquired by [[Alpha Natural Resources]].) Twenty-nine miners were killed<ref>Massey Energy, [http://www.prnewswire.com/news-releases/update-on-rescue-efforts-from-massey-energy-90445529.html "Update on Rescue Efforts From Massey Energy"], Media Release, April 10, 2010.</ref> following an explosion 980 feet underground. Two miners were hospitalised. The accident was the worst in the United States since 27 miners were killed at Orangeville in Utah, in 1984.<ref>James Melkle,[http://www.guardian.co.uk/world/2010/apr/06/us-mine-explosion-west-virginia "US mine explosion leaves 25 dead: Four miners still missing after blast at West Virginia plant"] The Guardian, April 6, 2010.</ref>