The West Virginia mine had estimated in early March that production levels would be curtailed for approximately three to five weeks due to the company's conservative approach to remedying the situation and ensuring the safety of its workers.
“Our dedicated employees at Federal have done a terrific job getting the longwall back up and running in a safe and efficient manner," said Patriot president Richard Whiting.
“We are pleased that, as a result of our strong safety culture, we experienced no injuries during this clean-up effort, while also meeting our planned schedule."
The company did not publicly disclose any details of the roof fall issues.
It said at the time of the idling that Federal's lower production would impact first-quarter 2008 earnings, though it was unable to provide a guidance.
Patriot added that improving markets and other favourable circumstances that were not included in its full-year guidance would offset some of the lost production.