
The Illinois River serves as the dominant geographic and economic spine of this mid-1990s survey, dividing the landscape between the industrial and residential grid of Pekin and the low-lying wetlands of the west bank. Large-scale water management and industrial infrastructure are evident, notably the massive Powerton Lake and its associated Power Plant, which sit adjacent to the winding Mackinaw River. The area shows a complex mix of conservation and institutional land use, with the Pekin Lake State Conservation Area buffering the river, while the Federal Correction Center occupies a significant footprint south of the main city center.
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1905 · Peoria
USGS Topo · 1:62,500
1927 · Peoria
USGS Topo · 1:62,500
1929 · Manito
USGS Topo · 1:62,500
1930 · Glasford
USGS Topo · 1:62,500
1932 · Manito
USGS Topo · 1:62,500
1942 · Delavan
USGS Topo · 1:62,500
1948 · Glasford
USGS Topo · 1:62,500
1949 · Peoria East
USGS Topo · 1:24,000
1949 · Peoria West
USGS Topo · 1:24,000
1950 · Peoria West
USGS Topo · 1:24,000