Just reading the local weekly rag from my old home area (The Pointe Coupee Banner) yesterday, and THE front page story is that one of the "Big Cajun" coal power stations is being converted to natgas. That part of the country is all set, about 1/3 nuclear (River Band), 1/3 coal, and 1/3 natgas (both Big Cajun). No matter what "fuel" gets scarce, they will have working capacity in alternates.
November 21, 2012) The U.S. Environmental Protection Agency (EPA) and the Department of Justice announced today that Louisiana Generating, an electric generating company owned by NRG Energy, Inc., agreed to a settlement at its Big Cajun II coal-fired power plant in New Roads, Louisiana, which will result in the elimination of over 27,300 tons of harmful emissions per year. The settlement, lodged in federal court today in Baton Rouge, will require Louisiana Generating to spend approximately $250 million to reduce air pollution and also requires the company to pay a civil fine of $3.5 million and spend $10.5 million on environmental mitigation projects.
http://www2.epa.gov/enforcement/louisiana-generating-settlement