Big Spring
Spring in Laclede County, Missouri · on the USGS Russ quadrangle
37.51969, -92.61395
Maps that show Big Spring
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Russ, MO
USGS topo, 2021
Lebanon, MO
USGS historical 15-minute topo (1941)
Lebanon, MO
USGS historical 15-minute topo (1943)
Network to Freedom Brochure Map - National Underground Railroad Network to Freedom Program
National Park Service Maps (public domain) · National Underground Railroad Network to Freedom Program
U.S. Fish and Wildlife Service Alligator Snapping Turtle Range (2024)
Fish & Wildlife Service Refuge Maps (public domain)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-16 (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).