1949 Map of Gypsum Gap

About this map

The Atomic Energy Commission appears in the margin of this 1949 topographic study, signaling the era's focus on uranium and mineral resources in San Miguel County. The landscape is dominated by the broad Gypsum Valley and the neighboring Disappointment Valley, separated by a narrow passage at Gypsum Gap. Mining activity is evident along the valley slopes, with clusters of workings such as the Long Ridge Mines, Bald Eagle Mines, and Pitchfork Mines located near the water sources of Gypsum Creek. The presence of several Dams and water features like Larson Spring and a Flume illustrates the critical management of water for industrial and livestock use in this arid basin environment. Sparse infrastructure, mostly unimproved dirt roads, connects these remote mining operations to the surrounding plateau.