Keywords: Lock 48 four locks drawing from HABS.png en Architectural drawing of Lock 48 HABS says HABS MD 22-FOFR V 8- sheet 1 of 1 - Chesapeake Ohio Canal Lock 48 108 7 miles above tidewater Williamsport Washington County MD LOC-image hhh md0597 Historic American Buildings Survey MD-212 39 60056 -77 82083 Chesapeake Ohio Canal National Historical Park |