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Encyclopedia > Hastings Mine

The Hastings Mine is a mineral extraction site approximately two miles northeast of the city of Vallejo, Solano County, California. The Hastings site on Sulfur Springs Mountain was used for extraction of cinnabar until the year 1930.[1] The Hastings Mine is classified as a medium priority mine from the standpoint of environmental oversight.[2] In the last inspection of the Hastings Mine in 1997, sediments in a drainage below the mine were found to contain ten parts per million of mercury; furthermore, spring water below the mine exhibited a water concentration of .31 micrograms per liter (a violation of the State of California standard for receiving waters of .05 micrograms per liter). Miles of underground shafts were driven in the course of working the quicksilver deposits in the area. In 1989, Earth Metrics reviewed old 1918 maps of workings of the Hastings and St. John's Mines and found that mine shafts were not driven into the site prior to the year 1918.[3] Vallejo (pronounced IPA: , vuh-LAY-oe) is a city in Solano County, California, United States. ... Solano County is a county located in central part of the U.S. state of California, about halfway between San Francisco and Sacramento and is one of the nine San Francisco Bay Area counties. ... Cinnabar, sometimes written cinnabarite, is a name applied to red mercury(II) sulfide (HgS), or native vermilion, the common ore of mercury. ... Year 1930 (MCMXXX) was a common year starting on Wednesday (link is to a full 1930 calendar). ... General Name, Symbol, Number mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12, 6, d Appearance silvery Atomic mass 200. ... Quicksilver is a common name for the chemical element mercury, literally meaning living silver based on its appearance and its unusual liquidity at room temperature. ...


Environmental effects

Principal ongoing impact is from mercury contamination of spring water flowing beneath the site; moreover, historical analysis has shown that the volume of spring water itself has been greatly reduced from levels of a century ago. This reduction of spring flow has come about due to the extensive mine shafts driven to achieve the cinnabar extraction.[3]

See also

The Hayward Fault Zone is located in northern California in the San Francisco Bay Area. ... The New Almaden Quicksilver Mine, the oldest and most productive quicksilver mine in the United States, was discovered by Mexicanos. ...


  1. ^ U.S.Bureau of Mines, Mercury Potential in the United States
  2. ^ Oversight of inactive mercury mines in California
  3. ^ a b C.Michael Hogan, Marc Papineau et al., Environmental Assessment of the columbus Parkway Widening between Ascot Parkway and the Northgate Development, Vallejo, Earth Metrics Inc. Report 7853, California State Clearinghouse, Sept, 1989

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