The Portsmouth Mine, Croft Mine, and Armour Number Two Mine form a dense corridor of mining activity just north of Crosby and Ironton, highlighting the industrial legacy of the Cuyuna Range. The landscape is defined by a high concentration of water bodies and pits, where established settlements like Deerwood and Crosby Beach sit alongside specialized infrastructure such as the Mals-Serpent Lake Seaplane Base.
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This is the sole edition of this map. No revisions or reprints were ever made.
1912 · Deerwood
USGS Topo · 1:62,500
1913 · Cuyuna
USGS Topo · 1:62,500
1914 · Deerwood
USGS Topo · 1:62,500
1915 · Cuyuna
USGS Topo · 1:62,500
1915 · Brainerd
USGS Topo · 1:62,500
1918 · Brainerd
USGS Topo · 1:62,500
1953 · Duluth
USGS Topo · 1:250,000
1953 · Brainerd
USGS Topo · 1:250,000
1957 · Brainerd
USGS Topo · 1:250,000
1958 · Brainerd
USGS Topo · 1:250,000