 American Resources Corporation NASDAQ:AREC told investors that it has received approval from the Mine Safety and Health Administration MSHA for an advanced roof control plan at both its Carnegie 1 and Carnegie 2 mines in Pike County, Kentucky. The Fishers, Indiana-based company said the new roof control plan, which was issued due to the mine conditions and excellent work performed by its operating teams, will reduce operating costs by an estimated 2 per ton. 