Thomas N. Crellin No description specified. 1-2 (2 Records) Documents Historic Structure Report: Culvert 170 (Parkhead), Architectural Data, Chesapeake and Ohio Canal National Histoircal Park, MD. -D. C. -W. VA. (1976) Historic Structure Report: Mule Barn at Four Locks, Architectural Data, Chesapeake and Ohio Canal National Historical Park, MD. -D. C. -W. VA. (1975)