Ruins of lockhouse Location: Lock 19 C&O Canal towpath, Great Falls of the Potomac, near Potomac, MD Year: 2008 Merckdigitals catalogue number: 07-50023 Comments:

Ruins of lockhouse - detail Location: Lock 19 C&O Canal towpath, Great Falls of the Potomac, near Potomac, MD Year: 2008 Merckdigitals catalogue number: 07-50024 Comments:

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