Knoxville Pond
Reservoir in Marion County, Iowa · on the USGS Knoxville quadrangle
41.30500, -93.12354
Maps that show Knoxville Pond
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Knoxville, IA
USGS topo, 2022

Knoxville, IA
USGS historical 15-minute topo (1909)

Knoxville, IA
USGS historical 15-minute topo (1912)

Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)

IFR Enroute Low Altitude Chart L-27 (U.S.)
FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-12 (U.S.)
FAA, 2026-10-29

IFR Enroute High Altitude Chart H-05 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).