Porterfield Lake
Reservoir in Cass County, Texas · on the USGS Bloomburg quadrangle
33.16172, -94.07844
Maps that show Porterfield Lake
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Bloomburg, TX-AR
USGS topo, 2022
Atlanta, TX
USGS historical 15-minute topo (1907)
Atlanta, TX
USGS historical 15-minute topo (1910)
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-17 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-06 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).