Great Falls vicinity>
Chesapeake & Ohio Canal, Lockhouse at Lock 21, Swain's Lock Road, State Route 190, Great Falls, Montgomery County, MD
State Route 190 Vicinity, Great Falls vicinity, MD
Find maps of Great Falls, MD
Documentation compiled after 1933.
Survey number HABS MD-56-P
Unprocessed field note material exists for this structure (FN-40).
Historic American Buildings Survey (Library of Congress)
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