The Chocolate Mountains dominate the landscape of this arid desert region in Imperial County, where the topography is defined by the stark relief of mountain ranges and dry wash systems. In the southwestern corner of the quadrangle, the Coachella Canal introduces a human-engineered element to the environment, facilitating water transport through this sparse terrain. This infrastructure includes Siphon Sixteen, a specific engineering landmark along the canal's route. The map illustrates the isolated nature of this desert territory, highlighting how water management systems are essential to the geographic character of the area.
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This is the sole edition of this map. No revisions or reprints were ever made.
1940 · Frink
USGS Topo · 1:62,500
1940 · Iris Pass
USGS Topo · 1:62,500
1940 · Canyon Spring
USGS Topo · 1:62,500
1943 · Canyon Spring
USGS Topo · 1:62,500
1944 · Chuckwalla Mountains
USGS Topo · 1:62,500
1944 · Frink
USGS Topo · 1:62,500
1945 · Iris Pass
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1955 · Salton Sea
USGS Topo · 1:250,000
1956 · Frink NW
USGS Topo · 1:24,000