
Ranching and mining interests dominate the high desert floor and mountain slopes of Pima County in this 1940 survey. Centered on Palo Alto Ranch, the landscape is defined by the braided channels of Altar Wash and Brawly Wash, which drain the surrounding highlands. The Sierrita Mountains to the east are heavily marked by early 20th-century mineral extraction, including the Copper Glance Mine (abandoned), Philimena Mine (abandoned), and Banner Mine (abandoned).
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This is the sole edition of this map. No revisions or reprints were ever made.
1920 · Arivaca
USGS Topo · 1:125,000
1925 · Samaniego Peak
USGS Topo · 1:62,500
1925 · San Xavier
USGS Topo · 1:62,500
1934 · Tucson Mountains
USGS Topo · 1:125,000
1934 · Silver Bell
USGS Topo · 1:125,000
1938 · San Vicente
USGS Topo · 1:62,500
1939 · Twin Buttes
USGS Topo · 1:62,500
1939 · Tubac
USGS Topo · 1:62,500
1940 · Palo Alto Ranch
USGS Topo · 1:62,500
1941 · Presumido Peak
USGS Topo · 1:62,500