AditNow... the site for mine explorers and mining historians Mine explorer and mining history videos on YouTube Connect with other mine explorers on Facebook
AditNow Mine Exploration
Tip: do not include 'mine' or 'quarry', search by name e.g. 'cwmorthin', use 'Sounds like search' if unsure of spelling

Advanced Search
'Sounds like search'
Quick a b c d e f g h i j k l m n o p q r s t u v w x y z
Tip: narrow down your search by typing more than one word and selecting 'Search for all words' or 'Exact search'



Home > Mines, Quarries & Sites > Sulphur Bank Mercury Other Rock Mine

Sulphur Bank Mercury Other Rock Mine (United States)


A superfund site.

The Sulphur Bank Mercury Mine site is located at the southeastern end of the Oaks Arm of Clear Lake. The Superfund site also includes the Elem Tribal Colony which is located directly adjacent to the mine property. Approximately 70 houses are located within 3 miles of the site. A freshwater wetland is located 900 feet to the north of the mine. A critical habitat for three endangered wildlife species, the Peregrine Falcon, Southern Bald Eagle, and Yellow-Billed Cuckoo, is less than 1/4 mile from the site.

The 150-acre Sulphur Bank Mercury Mine site initially was mined for sulfur from 1865 to 1871. Mercury ore was mined intermittently by underground methods from 1873 to 1905. The site was intermittently open pit mined from 1915 to 1957. The mine, once one of the largest producers of mercury in California, has been inactive since 1957. Approximately 150 acres of mine tailings and waste rock and a flooded open pit mine (called the Herman Impoundment) are located on the property. The mine tailings extend into the Oaks Arm of Clear Lake along 1,300 feet of shoreline. Approximately two million cubic yards of mine wastes and tailings remain on the mine site. The Herman Impoundment, which is filled with acidic water, covers 23 acres to a depth of 90 feet and is located 750 feet up gradient of the lake. EPA's remedial investigation studies have found mercury and arsenic in the mine wastes and tailings. Mercury is present in the bottom sediments in Clear Lake, and mercury has bio-concentrated in the food web of Clear Lake. The levels of mercury in fish from the lake led the State to issue an advisory to limit consumption of fish. Clear Lake is the source of water that the Clear Lake Oaks Water District provides for municipal drinking water for 4,700 people.

Source: US EPA Region 9 Superfund

Photos of Sulphur Bank Mercury Other Rock Mine

Photographs Of Sulphur Bank Mercury
Photographs Of Sulphur Bank Mercury (1 photo)
Last updated June 16th 2012 by carnkie
Historic Photographs Of Sulphur Bank Mercury
Historic Photographs Of Sulphur Bank Mercury (0 photos)
Last updated June 16th 2012 by carnkie

Google Earth Map of Sulphur Bank Mercury Other Rock Mine

To view the location details and the Google Map please sign in or register an account.


Documents for Sulphur Bank Mercury Other Rock Mine

Sorry, there are no documents currently available. If you have any documents you can share please click the 'Upload a Document' tab.

Starless River - Caving Store Moore Books: Specialist BooksI.A. Recordings: Mining and Industrial History DVDs
Disclaimer: Mine exploring can be quite dangerous, but then again it can be alright, it all depends on the weather. Please read the proper disclaimer.
© 2005 to 2022 AditNow.co.uk
Back to Top