
Alma and the surrounding high-country mining districts are the focus of this 2022 survey, illustrating a landscape defined by historic hydraulic engineering and alpine terrain. The map traces several significant water-management features, including the Dyer Placer Ditch, Fairplay Mining Ditch, and Columbia Number 1 Ditch, which reflect the area's deep connection to industrial extraction. These man-made channels wind through the valley of the Middle Fork S Platte River, connecting prominent landmarks like Montgomery Reservoir and the Columbia Reservoir.
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This is the sole edition of this map. No revisions or reprints were ever made.
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