
Military Ridge defines the northern reaches of this Tri-State area, where the borders of Iowa, Wisconsin, and Illinois converge along the Mississippi River. The landscape is etched by the intricate drainages of the Grant River, Platte River, and Galena River, highlighting a region historically vital for its mineral wealth. A dense concentration of lead and zinc workings, including the Annie Mine, Basque Mine, and Liberty Mine, reveals the industrial heritage that once drove local economies in and around Platteville and Shullsburg. Along the riverbanks, the Upper Mississippi River Wild Life and Fish Refuge contrasts with the urban development of Dubuque, where landmarks like Clarke College and Loras College appear. The map also traces the era's rail network, featuring the Illinois Central Gulf and Burlington Northern railroads as they navigate the ridges and river bluffs.
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2 editions found
1900 · Anamosa
USGS Topo · 1:125,000
1900 · Lancaster
USGS Topo · 1:125,000
1901 · Peosta
USGS Topo · 1:125,000
1902 · Mineral Point
USGS Topo · 1:125,000
1902 · Elkader
USGS Topo · 1:125,000
1903 · Waukon
USGS Topo · 1:125,000
1904 · Lancaster
USGS Topo · 1:125,000
1905 · Richland Center
USGS Topo · 1:125,000
1908 · Lancaster
USGS Topo · 1:125,000
1911 · Elizabeth
USGS Topo · 1:62,500