
The Coxcomb Mountains dominate this 1987 survey, forming a stark geographic boundary between the Palen Valley to the east and the protected lands of the Joshua Tree National Monument Wilderness to the west. This arid landscape is defined by its critical infrastructure, most notably the Colorado River Aqueduct which skirts the mountain range and follows the lowlands of the Chuckwalla Valley. The presence of several prospects in the northern slopes suggests late-century mineral interest, while a network of 4wd tracks and a prominent Trans Line indicate the region's role as a corridor for utility and transit. Engineering details like a siphon and a protective levee system highlight the intensive management of water resources across this desert terrain.
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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 · Cadiz Valley
USGS Topo · 1:62,500
1943 · Iron Mountains
USGS Topo · 1:62,500
1943 · Coxcomb Mountains
USGS Topo · 1:62,500
1944 · Coxcomb Mountains
USGS Topo · 1:62,500
1952 · Palen Mountains
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1954 · Needles
USGS Topo · 1:250,000
1955 · Salton Sea
USGS Topo · 1:250,000