Train AM-1, with 74 cars and interleaved C420's and RS11's, passes the New Jersey Zinc Company's west plant in Palmerton. The zinc company was by far the largest employer in Palmerton, but the by-products of its operation constantly spewed into the air, eradicating much of the vegetation on the Blue Mountain, including the Lehigh Gap in the background. Today the plant has been razed, and trees are slowly returning to the mountain.