The clash between mineworkers and coal company agents at Blair Mountain in 1921 resulted in the suppression of a campaign for union representation, but thrust the Stygian conditions mineworkers faced into national attention. It was a step on the road in the volcanic struggle fought in the first half of the last century to claw back some equity from the titans of industry. The popular knowledge of this history has more or less bled from the public consciousness by now, however, making it possible for the National Park Service to delist the Blair Mountain site, effectively giving Massey the go-ahead. The bulldozers are already at work.
Good articles at the Guardian, Sierra Club, and Huffington Post.