Field Trip to the North Bloomfield Gold Mine, California

​Matthew Johnson

Eroded cliffs at the former North Bloomfield mine. Photo by author, July 2017.

In the 1850s, Californians experienced the state’s natural environment primarily through work. In was the gold rush then and the northern Sierra Nevada foothills were overrun with miners. Although many Californians associate gold mining with human labor, the largest and most productive companies harnessed the mountain’s rivers to mine for gold. Mining companies built networks of reservoirs and canals that diverted water to hydraulic cannons which then blasted the water against mountainsides. As entire hillsides washed away, a mercury-lined sieve sitting in the center of the valley attracted gold. By the mid-1870s, a hydraulic mine at North Bloomfield, near present day Nevada City, became the largest gold mine in the state. The landscape at North Bloomfield was so scarred from the water cannons that French miners reportedly compared it to the Battle of Malakoff, a bloody episode in the Crimean War (1853-1856). ​Read more on the blog.