"There's approximately 18,000 to 20,000 miners in Kentucky right now,'' Hall said. "If those production levels go down ... you can see what effect that would have.''
Industry supporters and political leaders from the coalfields have taken aim at the Environmental Protection Agency under Obama, saying its tough stance on a controversial surface mining method known as mountaintop removal is stifling production and eliminating jobs.
In 2009, the year President Obama took office, coal production in eastern Kentucky fell by nearly 19 percent from the year before, from 90 million tons to 73 million.
"I am as afraid of my government as I have ever been,'' said Rusty Justice, who owns a Pikeville, Ky., engineering and construction business that works with coal operators. "The policies being enacted by my government is going to destroy the economy of my part of the state.''
Powerful politicians like Senate Minority Leader Mitch McConnell, Kentucky Gov. Steve Beshear and West Virginia Sen. Joe Manchin have railed against the federal government's enforcement actions against the industry, calling them a "war on coal.''
Robert Ukeiley, an environmental lawyer in Berea, Ky., said industry and political leaders ignore the fact that seams in the region are getting harder to reach.
"They'll blame it on Obama and climate change, rather than just acknowledge that geology trumps economics,'' he said.
In one of the biggest blows to the industry, the EPA earlier this year revoked a water permit for Arch Coal's Spruce No. 1 mine in Logan County, which was to be West Virginia's largest surface mine that uses mountaintop removal. Plans for the Spruce mine included the burial of more than six miles of streams with material blasted and scraped from the mountain tops.
The West Virginia Coal Association, an industry group, said the rare act of revoking the permit "casts a dark shadow over all federal regulatory permit actions related to the coal industry in West Virginia and elsewhere.'' The group said the action eliminated hundreds of potential jobs.
Coal operators have also decried the regulations.
A top eastern Kentucky coal producer, Tampa, Fla.-based TECO Energy, said in its 2010 annual report that compliance with EPA standards are "projected to be very costly'' and could make its "reserves no longer economic to develop.''
Several coal operators and company executives, including officials from St. Louis-based Arch and TECO, were asked to comment for this story, but they declined to be interviewed by the AP.
Experts say a sign of the region's declining reserve base of coal is the steady drop in production despite the increase in hiring over the last decade. They say it's taking more labor to mine the same or less amount of coal.
Even with more workers, production dropped in Central Appalachia's underground and surface mines to 196 million tons in 2009 from 261 million in 2000 -- a 25 percent decline.
"Now that tells you something, because it's not been declining in other parts of the country in that way. It tells you something about the economics of coal mining here,'' said Jason Bailey, a researcher at the Mountain Association for Community and Economic Development in Berea.
The Energy Information Administration said in a 2011 outlook statement that the region's coal is "extensively mined'' and its higher-cost coal will slowly be "supplanted by lower cost coal from other supply regions.''
Wyoming's Powder River Basin, produced about 417 million tons in 2009, more than twice the output of Central Appalachia that year.
Justice said when he was just getting into the business, an old veteran of the mines gave him some words to live by.
"He said, `The number one rule in mining is you mine the best and then what's left is the best,''' Justice said. "They've been mining coal here in the valley for about 100 years. And the first day the first guy mined the best lump of coal he could find -- that was the easiest to get.''