Conococheague Creek carves a winding path through the limestone valley of Washington County, anchoring a landscape where colonial-era boundaries and modern transportation corridors meet. The historic Pennsylvania-Maryland border, famous as the Mason-Dixon line, bisects the northern reaches near Worleytown and the village of Mason and Dixon. This 2016 survey illustrates the persistent agricultural character of the region, evidenced by historic industrial sites like Fairview Mill and Kemps Mill alongside numerous family and church burial grounds including Mount Tabor Graveyard and Salem Graveyard.
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1900 · Mercersburg
USGS Topo · 1:62,500
1902 · Chambersburg
USGS Topo · 1:62,500
1902 · Mercersburg
USGS Topo · 1:62,500
1909 · Hagerstown
USGS Topo · 1:48,000
1912 · Hagerstown
USGS Topo · 1:62,500
1912 · Williamsport
USGS Topo · 1:62,500
1942 · Hagerstown
USGS Topo · 1:125,000
1943 · Hagerstown
USGS Topo · 1:125,000
1943 · Mercersburg
USGS Topo · 1:24,000
1943 · Chambersburg
USGS Topo · 1:62,500