April 1, 2015 Source: U.S. Energy Information Administration, based on DrillingInfo Inc., New York State Geological Survey, Ohio State Geological Survey, Pennsylvania Bureau of Topographic & Geologic Survey, West Virginia Geological & Economic Survey, and U.S. Geological SurveyNote: Map includes production wells from January 2003 through December 2014. . Natural gas production from the Marcellus […]
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