Keywords: Lock 72 from HABS LOC on C and O Canal.tif en Lock 72 at mile 174 4 Note there is a bit of whitewash on the lock walls It was customary to whitewash the locks LOC-image hhh md0893 Historic American Buildings Survey Jack E Boucher MD-891-1 39 54139 -78 61167 Chesapeake Ohio Canal National Historical Park PD-USGov |