The Natoma Water Company was formed in 1851 by local miners to construct a 20-mile ditch that would supply water for miners seeking gold. The ditch started up by the new salmon falls bridge and reached down to Granite City, which today is named Folsom. The ditch was named the "Natoma Ditch" and it cost around $175,000 to build. In 1912 the Natoma Water Company lined 13,000 feet of the ditch with concrete. In 1953 the government bought most area to build Folsom Lake. The Natoma Water Company is now called Natoma Company.