
The Grand River and Maple River converge in this mid-1970s landscape, shaping the industrial and social development of eastern Ionia County. The villages of Muir and Lyons sit at this river junction, where several gravel pits and the Chesapeake and Ohio railroad grade indicate a local economy tied to both resource extraction and transportation. To the south, the city of Portland is centered near the Portland Municipal Dam, which along with Webber Dam and Wagar Dam, demonstrates the extensive hydroelectric and water management infrastructure of the era.
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This is the sole edition of this map. No revisions or reprints were ever made.
1916 · Ionia
USGS Topo · 1:62,500
1918 · Ionia
USGS Topo · 1:62,500
1943 · Ionia
USGS Topo · 1:62,500
1945 · Portland
USGS Topo · 1:62,500
1954 · Midland
USGS Topo · 1:250,000
1958 · Midland
USGS Topo · 1:250,000
1958 · Grand Rapids
USGS Topo · 1:250,000
1959 · Midland
USGS Topo · 1:250,000
1961 · Grand Rapids
USGS Topo · 1:250,000
1962 · Grand Rapids
USGS Topo · 1:250,000