All comes down to economics, physically it is probably there, but the cost to get it out becomes very expensive at some point.
Last year, the U.S. Geological Survey completed an extensive analysis of Wyoming's Gillette coal field, the nation's largest and most productive, and determined that less than 6% of the coal in its biggest beds could be mined profitably, even at prices higher than today's.
"We really can't say we're the Saudi Arabia of coal anymore," says Brenda Pierce, head of the USGS team that conducted the study.
The Energy Information Administration, part of the Department of Energy, says it is reassessing its coal tally in light of the new Geological Survey data. It intends to create a new coal baseline from which it will begin its annual subtraction "as soon as we can," says William Watson, a member of the energy analysis team at EIA in Washington, D.C.
The agency began with the Powder River's rich Gillette coal field, an 80-mile-long strip in northeastern Wyoming that contains the nation's 10 top-producing mines. About one-third of all coal in the country is produced there. Some 1.2 million short tons leave the field daily, a river of coal filling more than 75 trains of 125 to 150 cars each.
For the Gillette study, USGS engineers, geologists and economists spent three years analyzing data from 10,200 drill holes, the most comprehensive study ever attempted of the region. The team concluded there are 201 billion short tons of coal in the Gillette field. Environmental rules and physical challenges put much of that out of reach, leaving what they figured were 77 billion short tons of recoverable coal.
Little is presently worth mining. Analyzing coal beds that contained 82% of the Gillette deposits, the team determined that with coal selling for $10.50 a ton, the prevailing price two years ago, less than 6% of the coal could be extracted profitably enough to leave mining companies an 8% rate of return.
If Powder River prices were to hit $60 a ton in current dollars, as much as 47% could be extracted. But at that price, coal would have a tough time competing with other fuels and technologies.
Some interesting stuff here, a really good read.
Still a lot of coal left in the ground...
http://online.wsj.com/article/SB124414770220386457.htmlEDIT:Looks like the link was changed and now u can't read the whole thing... Not sure how to get around that?
lawns should be outlawed.