A portion of the area is underlain by the Pittsburgh Terminal No. 8 Mine (Cortis and others, 1975), which was commonly known as the "H" Mine and the Coverdale Mine. The mine opened around 1920. The historic operations of the Coverdale Mine are apparent on a Bridgeville 7.5-minute topographic map. A “Mine Dump” is shown adjacent to the Montour Railroad tracks and South Park Road. Coal was mined through vertical shafts accessing inclined slopes following the dip of the Pittsburgh coal seam. Mine voids in the inclined slope resulted from the practice of room and pillar mining during the early 20th century. The Coverdale Mine is closed and largely unflooded.