
Oakdale serves as a major transportation hub on this 1940s landscape, where the Sierra Railway of California meets the Southern Pacific and the Atchison Topeka and Santa Fe. The map documents a highly developed irrigation economy along the Stanislaus River, defined by an intricate network including the South San Joaquin Irrigation District Canal, Tulloch Ditch, and Woodward Reservoir. North of these waterworks, the terrain transitions into the broad Bachelor Valley and the historic land grants of Rancho Thompson and Rancho Del Rio Estanislao. Rural life is marked by numerous district schools such as Wheatland School and Lone Tree School, alongside smaller rail stops like Thalheim and Trigo. This survey, revised using 1939 aerial photos, captures the region's agricultural plumbing just before the mid-century expansion of the Central Valley Project.
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This is the sole edition of this map. No revisions or reprints were ever made.
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