Last month at the Longwall USA Conference & Exhibition in Pittsburgh, Pennsylvania, Coal Age presented the Top Performer Awards to four U.S. longwall mines. The awards winners were selected based on the mine's overall safety performance during the intervening years (2017 and 2018 in this case), along with average raw longwall production per day and the mine's total production. Using data from the U.S. Longwall Census published in the January-February 2019 edition of Coal Age, all the U.S. longwall mines were subdivided into three categories by cutting height: high (96 inches and greater), medium (72 to 95 inches), and low (71 inches and less).
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