
The San Luis Valley serves as a broad agricultural and transport corridor on this mid-century survey, bounded by the dramatic rise of the Sangre de Cristo Range. Extensive irrigation is evident through features like the Morgan Drain near Alamosa, while the valley floor is dotted with small rural communities and institutions, including the South Bradford School and St Marys Ch. To the east, the landscape transitions into the coal-producing regions of the Huerfano River valley, where the Allen Mine and the rail-hub of Walsenburg mark the industrial activity of the era. The presence of the Great Sand Dunes National Monument highlights the unique geologic character of the region. Mountain crossings such as Veta Pass and Whiskey Pass demonstrate the critical routes used by the Denver and Rio Grande Western RR to connect these isolated high-altitude basins with the plains.
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This is the sole edition of this map. No revisions or reprints were ever made.
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