1962 Map of Valley Springs

About this map

The Calaveras River and Mokelumne River corridors define this landscape at a time of significant hydrological transformation. The 1962 field check captures the area as the New Hogan Reservoir and Camanche Reservoir were being established, with blue hatching indicating areas soon to be submerged by the New Hogan Dam. This era of water management overlays a much older history of resource extraction, evidenced by the Penn Mine, Pluto Mine, and Emma Mine scattered throughout the hills. The Southern Pacific railroad serves the settlement of Valley Springs, while the historic community of Campo Seco sits near the northern edge of the quadrangle. These topographic details illustrate the shift from a mining-based economy to one centered on massive water infrastructure projects in the mid-20th century.