
The Mad River valley in West Central Ohio defines this landscape, where fertile floodplains meet the rising hills of Champaign and Clark counties. The Cedar Swamp State Memorial preserves a significant glacial fen south of the western edge of Urbana, a city shown at a moment of mid-century growth. This 1961 survey, updated with 1973 photogrammetric revisions, reveals a dense network of early transportation routes, including the Old Troy Pike and the crossing lines of the Penn Central and Erie-Lackawanna railroads.
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4 editions found
1904 · Springfield
USGS Topo · 1:62,500
1906 · Springfield
USGS Topo · 1:62,500
1907 · South Charleston
USGS Topo · 1:62,500
1914 · St. Paris
USGS Topo · 1:62,500
1914 · Mechanicsburg
USGS Topo · 1:62,500
1916 · Mechanicsburg
USGS Topo · 1:62,500
1916 · St. Paris
USGS Topo · 1:62,500
1944 · Mechanicsburg
USGS Topo · 1:62,500
1944 · St. Paris
USGS Topo · 1:62,500
1947 · Columbus
USGS Topo · 1:250,000