Tank Number Four
Reservoir in Pima County, Arizona · on the USGS Stevens Mountain quadrangle
31.97994, -111.32462
Maps that show Tank Number Four
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Stevens Mountain, AZ
USGS topo, 2021
Palo Alto Ranch, AZ
USGS historical 15-minute topo (1940)
Palo Alto Ranch, AZ
USGS historical 15-minute topo (1943)
Nogales & Sierra Vista Ranger Districts
Front Motor Vehicle Use Map (MVUM) — Coronado National Forest
IFR Enroute Low Altitude Chart L-05 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-04 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).