1949 Map of Red Canyon

About this map

The United States Atomic Energy Commission collaborated on this 1949 field-checked survey, highlighting a landscape defined by uranium-era prospecting and traditional ranching. The deep gorge of the Dolores River dominates the western half, while the San Miguel River enters the frame to the south. Numerous mining operations are documented throughout the river canyons, including the North Star Mine, Black Rock Mine, and the clustered Shamrock Mines.