The NS 8104 Lehigh Valley leads the weekly limestone run into the yard at Belews Creek. Limestone is used in the plant WFGD or "scrubber" system and is injected into the flue gas to help reduce Sulfur Dioxide, the key ingredient in Acid Rain. The byproduct from this process is synthetic Gypsum, which is sold to produce wallboard or Sheetrock as it is better known. It is loaded onto trucks and taken to a wallboard plant near Mount Holly, NC. The pile to the left is Limestone, to the right Gypsum. Photo was taken from the top of the powerhouse with an Iphone 7 in the Adobe DNG raw format