1912 Map of Mariposa

About this map

The Mariposa Grove Big Trees stand at the northeastern corner of this 1912 survey, signaling the transition from the high Sierras into a landscape of early 20th-century industry. The map illustrates a complex network of resource extraction and early settlement, where the Southern Pacific Railroad reaches into the foothills to connect with mining and timber hubs. Notable industrial sites like the Enterprise Mine, Quartz Mine, and Standard Mill are scattered among family ranches and community centers like Coarse Gold and Fresno Flats. This survey documents a critical period of infrastructure development, featuring the Crane Valley Reservoir and the Powerhouse, which indicate the early harnessed power of the San Joaquin River. For genealogists, the map is particularly dense with rural institutions, from the Indian Settlement to numerous local schools like the Chowchilla School and Oakvale School.