The South Branch Patapsco River and the Patuxent River carve through the landscape of Howard and Carroll Counties, framing a region defined by its long-standing milling heritage and agricultural hamlets. The settlement of Woodbine sits near the northern boundary, while the central corridor is punctuated by crossroads like Lisbon and Poplar Springs, which historically served as vital stops along the early turnpike routes. The persistence of water-powered industry is evident in the cluster of mill sites such as Carrs Mill, Roxbury Mills, and Hipsleys Mill, each marking a point where local streams like Cattail Creek were harnessed for trade.
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1892 · Laurel
USGS Topo · 1:62,500
1892 · Ellicott
USGS Topo · 1:62,500
1893 · Frederick
USGS Topo · 1:125,000
1894 · Ellicott
USGS Topo · 1:62,500
1894 · Laurel
USGS Topo · 1:62,500
1894 · Frederick
USGS Topo · 1:125,000
1897 · Laurel
USGS Topo · 1:62,500
1906 · Ellicott
USGS Topo · 1:62,500
1907 · Laurel
USGS Topo · 1:62,500
1908 · Patapsco
USGS Topo · 1:125,000