The industrial legacy of Baltimore County is evident across this landscape, where large-scale extraction sites like the Oregon Ore Bank, Caves Ore Bank, and Cross Ore Bank mark the historic iron ore deposits that once fueled local furnaces. By the early 21st century, these sites exist alongside modern developments such as the Campbell Quarry and Greenspring Quarry. The map detail follows the course of Jones Falls and its many tributaries, including Beaverdam Run and Western Run, which historically provided the water power for early mills in settlements like Oregon and Ashland.
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1892 · Ellicott
USGS Topo · 1:62,500
1894 · Ellicott
USGS Topo · 1:62,500
1894 · Baltimore
USGS Topo · 1:62,500
1899 · Baltimore
USGS Topo · 1:62,500
1900 · Parkton
USGS Topo · 1:62,500
1902 · Parkton
USGS Topo · 1:62,500
1904 · Baltimore
USGS Topo · 1:62,500
1905 · Westminster
USGS Topo · 1:62,500
1906 · Ellicott
USGS Topo · 1:62,500
1908 · Patapsco
USGS Topo · 1:125,000