
Mining operations dominate the landscape of the Humbug Mountain and Pinto Mountains area in this mid-1980s topographical study. The map documents a significant history of extraction across the San Bernardino and Riverside county line, where complex topography is punctuated by numerous named claims. Researchers can find specific locations such as the Imperial Mine, Gypsy Mine, and Golden Eagle Mine. Traces of previous habitation and industry are evident at the Ruins Old Mill Site and scattered Ruins near the Joel Mine. The settlements of Old Dale and New Dale anchor the northern portion of the quadrangle, reflecting the shifting centers of local activity. A Radio Facility in the northeast corner highlights the modernization of this arid mountain terrain during the latter half of the twentieth century.
15 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1942 · Amboy
USGS Topo · 1:250,000
1943 · Amboy
USGS Topo · 1:250,000
1943 · Pinkham Well
USGS Topo · 1:62,500
1944 · Pinkham Well
USGS Topo · 1:62,500
1944 · Eagle Tank
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1954 · Needles
USGS Topo · 1:250,000
1954 · Valley Mtn
USGS Topo · 1:24,000
1955 · Salton Sea
USGS Topo · 1:250,000
1956 · Needles
USGS Topo · 1:250,000