
Imperial Valley agriculture is defined by the intricate network of irrigation ditches and drains that cross this section of Imperial County. The landscape is a testament to hydraulic engineering, featuring a vast grid of named watercourses such as the Vail Supply Canal, Marigold Lateral, and Nutmeg Lateral. These man-made channels support the intensive farming around the settlements of Wiest and Munyon, where the dry desert has been transformed into a productive agricultural basin. Near the southern end of the sheet, the Alamo River meanders toward Wiest Lake and Finney Lake, providing rare natural breaks in the rigid geometry of the canal system. Local history is etched into the road grid, with many routes like Chalupnik RD and Dickerman RD likely named for the pioneering farming families who settled these tracts.
87 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.
1907 · Holtville
USGS Topo · 1:125,000
1915 · El Centro
USGS Topo · 1:125,000
1940 · Brawley
USGS Topo · 1:62,500
1940 · Iris
USGS Topo · 1:62,500
1940 · Alamorio
USGS Topo · 1:62,500
1942 · El Centro
USGS Topo · 1:250,000
1943 · Brawley
USGS Topo · 1:62,500
1944 · Calipatria
USGS Topo · 1:62,500
1945 · Alamorio
USGS Topo · 1:62,500
1945 · Iris
USGS Topo · 1:62,500