Knowles Reservoir

Reservoir in Zavala County, Texas · on the USGS La Pryor quadrangle

28.93691, -99.79867

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La Pryor, TX — USGS 7.5-minute topo (2022)

La Pryor, TX

USGS topo, 2022

La Pryor, TX — USGS historical 15-minute topo (1939)

La Pryor, TX

USGS historical 15-minute topo (1939)

IFR Enroute Low Altitude Chart L-20 (U.S.) — FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-20 (U.S.)

FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-19 (U.S.) — FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-19 (U.S.)

FAA, 2026-10-29

IFR Enroute High Altitude Chart H-07 (U.S.) — FAA, 2026-10-29

IFR Enroute High Altitude Chart H-07 (U.S.)

FAA, 2026-10-29

Name, class, county and location: USGS Geographic Names Information System (public domain).