
Plomosa terrain and the arid expanses of La Paz County define this 1990 provisional survey. The landscape is marked by the presence of mineral exploration, with several prospects and an adit located in the northeastern quadrant, suggesting the area's history of small-scale mining. Transportation across this portion of the Sonoran Desert is anchored by Plomosa Road, which traverses the southern sections and provides the primary corridor through the valley. Aside from a Gravel Pit and scattered tanks used for water storage, the map reveals a largely undeveloped landscape where section lines and township boundaries like T 6 N T 5 N provide the principal structure for land organization.
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This is the sole edition of this map. No revisions or reprints were ever made.
1930 · Linskey
USGS Topo · 1:62,500
1931 · Moon Mtn
USGS Topo · 1:62,500
1932 · Moon Mtn
USGS Topo · 1:62,500
1933 · Cunningham Mtn
USGS Topo · 1:48,000
1940 · Dome Rock Mts
USGS Topo · 1:62,500
1942 · Blythe
USGS Topo · 1:250,000
1942 · MOON MTN
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1955 · Salton Sea
USGS Topo · 1:250,000
1959 · Salton Sea
USGS Topo · 1:250,000