Port Isabel Reservoir
Reservoir in Cameron County, Texas · on the USGS Mouth of Rio Grande quadrangle
25.96040, -97.22875
Maps that show Port Isabel Reservoir
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Mouth of Rio Grande, TX,TAM, US
USGS topo, 2025
Mouth Of Rio Grande, TX
USGS historical 15-minute topo (1955)
Regional Map - El Camino Real de los Tejas National Historic Trail
National Park Service Maps (public domain) · El Camino Real de los Tejas National Historic Trail
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-20 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-07 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-21 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).