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The mine waste carried by the Yuba River ended up raising the riverbed (by up to 100 feet (30 m) in some cases), causing floods that buried farms east of the town of Marysville with gravel, mud, as well as mercury and arsenic (byproducts of the mining process). [5] As the Yuba River is a tributary of the Sacramento River, much of that debris ...
Argonaut Mining Company: 1893–1942 registered as California Historical Landmark #786. Golden Fleece Tunnel: Westville: Golden Fleece Mining & Milling Co. Iron Mountain Mine: Redding: Kennedy Mine: Jackson: 1886–1942 South of Sutter Gold Mine Locarno Mine
Iron Mountain Mine, also known as the Richmond Mine at Iron Mountain, is a mine near Redding in Northern California, US. Geologically classified as a "massive sulfide ore deposit", the site was mined for iron , silver , gold , copper , zinc , quartz , and pyrite intermittently from the 1860s until 1963.
This mine is still mined occasionally today. In 1992 $70,000 was mined out of it. In 1849 gold was first found in the Yuba river in Downieville. The tale of a 427-pound nugget found near there is unverified. [9] [10] Hydraulic mining was used at Howland Flat and Poker Flat in the 1850s. $700,000 worth of gold came out of Poker Flat alone. [3]
The Sacramento River (Spanish: Río Sacramento) is the principal river of Northern California in the United States and is the largest river in California. [9] Rising in the Klamath Mountains , the river flows south for 400 miles (640 km) before reaching the Sacramento–San Joaquin River Delta and San Francisco Bay .
[17] [18] [20] [21] In 2004, the California Environmental Protection Agency published a staff report that acknowledged the continued increase of mercury in Cache Creek, and determined that 12 percent of the source were old mercury mines located near major tributaries such as: North Fork Cache Creek, Clear Lake outflow, Bear Creek, Harley Gulch ...
The McLaughlin Mine enjoyed a reputation as one of the most ecologically sensitive gold mining operations in the world. [87] Nevertheless, during its last year of operation in 2002, the mine emitted 32,396 pounds of mercury into the environment. It was the largest industrial mercury emitter in California that year. [88]
Gold mines in California (25 P) Pages in category "Mines in California" The following 4 pages are in this category, out of 4 total.