1968 Map of Seneca

About this map

The Potomac River serves as the central artery of this 1968 landscape, dividing the rolling terrain of Montgomery County, Maryland, from the northern reaches of Fairfax and Loudoun Counties in Virginia. The river is punctuated by numerous named landforms including Watkins Island, Clagett Island, and Sharpshin I, revealing the complex hydrology of the Piedmont region before modern suburban expansion fully gripped the corridor. Historic road networks like River Road and Georgetown Pike connect rural clusters such as Darnestown and Seneca, where a Mill and Quarry indicate the area's early industrial and agricultural foundations. Local heritage is deeply embedded in the survey, from the Dranesville Tavern Park to scattered country congregations like Smiths Chapel and Poplar Grove Ch. The map captures the area just as the 1980s revisions began to note a changing landscape, including the Filtration Plant near Watts Branch.