Tag Archives: Arch Coal


Flying Stockpiles

A team in Colorado is accurately estimating coal stockpileĀ volumetrics with drones. Arch Coal is the second-largest domestic producer of metallurgical and thermal coal in America, with 96 million tons of coal sold in 2016. In total, Arch represents more than 13% of America’s coal supply from their complexes in Colorado, Illinois, Kentucky, West Virginia, Wyoming,...