Wyoming will mine its ten billionth ton of coal in the month of May. Since 1987, Wyoming has been the nation's largest producer of coal. During 2012 Wyoming mines have produced 401 million tons of coal, with a total value of four billion dollars.
Using historical data dating back to 1865, the Wyoming State Geological Survey has determined that the state's energy contribution to the nation since that time is equivalent to powering the entire nation's electricity grids for more than eight years.
Wyoming has enough reserves to produce coal long into the future and expand into international markets. But, Washington state is trying to block Wyoming's access to those international markets with efforts to close their ports to Wyoming coal. Governor Mead and many others are currently in a battle to get those ports opened.