According to a recent trade journal, Arch, in fact, did finally receive permit approval. The state, reportedly, will more closely monitor the effects of mountain top removal / valley fill mining to determine future permit rulings.
Your statement is correct -- Arch did receive a permit for the mine, but sometime last week a Federal judged issued an injunction which blocks the mine permit because of claims by an environmental group that mountaintop removal mining causes irreversible damage to the environment.
On March 8, Arch announced it will immediately lay off 30 workers at the mining complex and mine closure will commence. Of course, Arch will continue the legal battle to open the mine.
Just trying to correct the facts. Good luck to all miners impacted and the 5 to 8 jobs in supporting industries created by each coal miner.