
Gillespie and its neighbor East Gillespie anchor the southern portion of this mid-1970s landscape, which illustrates a transition from agricultural land to industrial and recreational utility. The presence of the Monterey Mine No 1 and the surrounding Gillespie-Wyen Oil Field highlights the region's reliance on subsurface resources. Transport infrastructure is prominent, with the Illinois Terminal and the Chicago and North Western railroad lines cutting through the terrain to connect local industry and settlements like Henderson and Monterey Siding.
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1912 · Gillespie
USGS Topo · 1:62,500
1915 · Gillespie
USGS Topo · 1:62,500
1915 · Mount Olive
USGS Topo · 1:62,500
1923 · Carlinville
USGS Topo · 1:48,000
1923 · Raymond
USGS Topo · 1:62,500
1925 · Carlinville
USGS Topo · 1:62,500
1925 · Raymond
USGS Topo · 1:62,500
1931 · Carlinville
USGS Topo · 1:62,500
1944 · Mount Olive
USGS Topo · 1:62,500
1958 · Decatur
USGS Topo · 1:250,000