Placer Canyon cuts through this arid landscape in eastern Riverside County, where the desert floor is defined by a complex network of seasonal drainage patterns and sparse water sources. The dominant hydrological feature is Pinto Wash, which trends across the terrain and serves as a primary conduit for desert runoff during flash flood events. A vital point of interest for local history and wildlife is Eagle Tank Spring, one of the few named water sources in this stretch of the Colorado Desert. The 2012 survey illustrates the topographic character of the region before any modern developments altered these natural drainages, showing the precise relationship between the alluvial fans and the main canyon floor.
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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 · Coxcomb Mountains
USGS Topo · 1:62,500
1944 · Eagle Tank
USGS Topo · 1:62,500
1944 · Coxcomb 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
1956 · Needles
USGS Topo · 1:250,000