
The New River carves a sinuous path through this 1940 Imperial Valley landscape, highlighting a complex irrigation and transport network developed shortly before the mid-century. A grid of irrigation canals, including the Main Canal, Thistle Canal, and Tokay Canal, supports the agricultural expansion surrounding the major hubs of Brawley, Imperial, and El Centro. The map illustrates the transition from the desert basin, marked by the Sea Level contour, to a highly managed agricultural plain.
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This is the sole edition of this map. No revisions or reprints were ever made.
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