Armstrong currently operates seven active coal mines, three preparation plants, a rail load-out facility and a dock facility on Kentucky's Green River. In 2011, Armstrong sold 7.2 million tons of coal from its active mines.

Armstrong's mines and facilities include:
Midway Mine, Preparation Plant and Rail Loadout
Parkway Mine and Preparation Plant
East Fork Mine
Equality Boot Mine
Lewis Creek Mine
Kronos Mine
Maddox Mine
Armstrong Dock and Preparation Plant