Where does your energy come from? The truth is Coal powers most of the world. But coal and coal by-products go far beyond energy production to be fundamental to our modern lives. One of the most sophisticated and automated ways to mine coal is through Longwall mining. Longwall Associates is an international OEM supplier of Longwall Conveyor Systems. With equipment operating in four countries and on three continents, Longwall Associates is proud to be a link in the global coal production chain.