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1968 Map of Seneca

Name: 1968 Topographic Map of Seneca
Creator: U.S. Geological Survey
Published: 1984
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1984

About this map

The Potomac River carves a dramatic boundary through this 1960s survey, separating Montgomery County, Maryland, from the Virginia counties of Loudoun and Fairfax. This corridor is defined by the Chesapeake and Ohio Canal National Historical Park, where historical locks like Lock 24 and Lock 23 near Rushville trace the legacy of nineteenth-century river commerce. Further downstream, the river fragments into a series of significant landforms, including Watkins Island, Clagett Island, and Conn Island, leading toward the complex hydrology of Great Falls National Park.

Away from the water, the landscape transitions into established rural communities and early suburban growth. Settlements such as Darnestown, Quince Orchard, and Travilah are connected by a network of winding roads like River Road and Georgetown Pike. Local history is anchored by landmarks such as Smiths Chapel, the Poplar Grove Ch, and the Dranesville Tavern Park, providing a detailed look at the social and transport geography of the Potomac Valley before modern expansion.