Consolidation Coal Company Mine No. 11, Lepley Ventilator, East side of State Route 936, Midlothian, Allegany County, MD
Significance: The Lepley ventilator is significant as one of the few centrifugal mine ventilation fans in the eastern United States, surviving in situ. The ventilator, patented in 1903 by Daniel Lepley, helped improve the health and safety of miners by removing impure air and gases and providing fresh air to mine passages.
Survey number: HAER MD-87-A