1962 Map of Valley Springs

About this map

The Mokelumne River and Calaveras River basins undergo significant structural change in this early 1960s survey, marked by blue hatching that indicates areas soon to be submerged by the New Hogan Reservoir and Camanche Reservoir. The landscape preserves a transition from ranching and mining to large-scale water management, with numerous tailing piles and mineral operations like the Penn Mine and Pluto Mine dotting the hills near Valley Springs.