, settlement_type = Neighborhood of San Jose , nickname = , motto = , image_skyline = , image_flag = , image_seal = , image_map = , mapsize = , map_caption = , image_map1 = , mapsize1 = , map_caption1 = , pushpin_map = United States San Jose , subdivision_type =

Country A country is a distinct part of the world, such as a state, nation, or other political entity. It may be a sovereign state or make up one part of a larger state. For example, the country of Japan is an independent, sovereign state, while the ...

, subdivision_name = United States , subdivision_type1 =

State State may refer to: Arts, entertainment, and media Literature * ''State Magazine'', a monthly magazine published by the U.S. Department of State * ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States * ''Our S ...

, subdivision_name1 =

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

, subdivision_type2 =

County A county is a geographic region of a country used for administrative or other purposesChambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French ...

, subdivision_name2 = Santa Clara , government_footnotes = , government_type = , leader_title = , leader_name = , leader_title1 = , leader_name1 = , established_title = , established_date = , unit_pref = , area_footnotes = , area_magnitude = , area_total_km2 = , area_land_km2 = , area_water_km2 = , area_total_sq_mi = , area_land_sq_mi = , area_water_sq_mi = , population_as_of = , population_footnotes = , population_total = , population_density_km2 = , population_density_sq_mi = , timezone = Pacific (PST) , utc_offset = -8 , timezone_DST = PDT , utc_offset_DST = -7 , elevation_footnotes = , elevation_m = , elevation_ft = 492 , coordinates = , postal_code_type = ZIP code , postal_code = 95042 , area_code =

408 __NOTOC__ Year 408 (Roman numerals, CDVIII) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Bassus and Philippus (or, less frequentl ...

, blank_name =

GNIS The Geographic Names Information System (GNIS) is a database of name and locative information about more than two million physical and cultural features throughout the United States and its territories, Antarctica, and the associated states of ...

feature ID , blank_info = 1659212 , blank1_name = , blank1_info = , website = , footnotes = New Almaden, known in

Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Can ...

as Nueva Almadén, is a historic community and former mercury mine in the Capitancillos Hills of

San Jose, California San Jose, officially San José (; ; ), is a major city in the U.S. state of California that is the cultural, financial, and political center of Silicon Valley and largest city in Northern California by both population and area. With a 2020 popul ...

, located at the southwestern point of

Almaden Valley , other_name= , native_name= es, Almadén , nickname= , settlement_type= Neighborhood of San Jose , total_type= , motto= , image_skyline = , flag_size= , image_sea= , seal_size= , image_shield= , shield_size= , image_blank_emblem= , ...

South San Jose South San Jose is the southern region of San Jose, California. The name "South Side" refers to an area bounded roughly by Hillsdale Avenue and Capitol Expressway to the North, Camden Avenue to the West, Highway 101 and Hellyer Avenue on the east ...

. New Almaden is divided into two parts: the mines and much of their immediate surroundings, including historic

ghost town Ghost Town(s) or Ghosttown may refer to: * Ghost town, a town that has been abandoned Film and television * Ghost Town (1936 film), ''Ghost Town'' (1936 film), an American Western film by Harry L. Fraser * Ghost Town (1956 film), ''Ghost Town'' ...

settlements in the Capintancillas, which together form the

Almaden Quicksilver County Park Almaden Quicksilver County Park is a 4,163 acres (17 km²) park that includes the grounds of former mercury ("quicksilver") mines adjacent to south San Jose, California, USA. The park's elevation varies greatly: the most used entrance ...

, and the largely residential historic district surrounding the Casa Grande. Discovered in the 1820s by Mexican settlers, New Almaden mines are the oldest mines in California and were one of the most productive mercury mines in the country. Long before the arrival of the Spanish, Mexicans, and Americans, the indigenous Ohlone people had long utilized the area for its

cinnabar Cinnabar (), or cinnabarite (), from the grc, κιννάβαρι (), is the bright scarlet to brick-red form of mercury(II) sulfide (HgS). It is the most common source ore for refining elemental mercury and is the historic source for the bri ...

, which they used in paint production.NPS Santa Clara guide
/ref>

History

Cinnabar Cinnabar (), or cinnabarite (), from the grc, κιννάβαρι (), is the bright scarlet to brick-red form of mercury(II) sulfide (HgS). It is the most common source ore for refining elemental mercury and is the historic source for the bri ...

, bright red mercury ore, was used by the

Ohlone people The Ohlone, formerly known as Costanoans (from Spanish meaning 'coast dweller'), are a Native American people of the Northern California coast. When Spanish explorers and missionaries arrived in the late 18th century, the Ohlone inhabited the ...

for paint, but the settlers soon saw its potential to produce quicksilver. Andres Castillero, a captain in the Mexican Army, obtained a grant to the mine in 1846 but, occupied with his military duties during the Mexican War, soon sold it to Barron, Forbes Company, an English textile firm based in Tepic, Mexico. It was named "Nueva Almaden" by Alexander Forbes.Edgar Herbert Bailey, Donald Lough Everhar
Geology and quicksilver deposits of the New Almaden district, Santa Clara County, California
Professional Paper 360 USGS Castillero's mining claim was confirmed by the Board of Commissioners that evaluated private land claims in California on January 8, 1856, but there was continued litigation in the District court, ''The United States vs. Andres Castillero.'' A claim of fraud was made on behalf of the Quicksilver Mining Company, which had acquired a competing land claim originating in an agricultural claim to the land the mine was on. On appeal to the Supreme Court of the United States the claim was found invalid in a decision rendered March 10, 1863. One of the competing land claims was

Rancho Los Capitancillos Rancho Los Capitancillos was a Mexican land grant in present-day Santa Clara County, California given in 1842 by Governor Juan B. Alvarado to Justo Larios. Los Capitancillos means the Little Captains in Spanish. The grant was south of present- ...

The mine is named for a mercury mine in (old)

Almadén Almadén () is a town and municipality in the Spanish province of Ciudad Real, within the autonomous community of Castile-La Mancha. The town is located at 4° 49' W and 38° 46' N and is 589 meters above sea level. Almadén is approximately 3 ...

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

, which had operated since at least Roman times. (See

Heritage of Mercury. Almadén and Idrija Heritage of Mercury. Almadén and Idrija is a joint UNESCO World Heritage Site in Almadén, Castile-La Mancha, Spain, and Idrija, Slovenia. The property encompasses two mercury mining sites. In Almadén mercury has been extracted since Antiquity, ...

.) The term Almadén, meaning "the mine",Gudde, Erwin; William Bright (2004) California Place Names (Fourth ed. ed.). University of California Press. p. 9. is derived from the

Arabic language Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walter ...

. In 1863, acting on information that title to the mine had not been proven, Abraham Lincoln attempted to seize the mine, but the federal agent and deputy federal marshal were met at the mine gates by armed miners. Mindful of the possibility of losing the loyalty of California during the Civil War, the federal government backed off and Barron, Forbes Company was allowed to sell it to American investors for $1.75 million.

Arthur De Wint Foote Arthur De Wint Foote (1849–1933) was an American civil engineer and mining engineer who impacted the development of the American West with his innovative engineering works and entrepreneurial ventures. In Northern California in the late 1 ...

worked at New Almaden in the late 1870s under

James Butterworth Randol James is a common English language surname and given name: *James (name), the typically masculine first name James * James (surname), various people with the last name James James or James City may also refer to: People * King James (disambiguat ...

. Representations of historical life at the New Almaden Mine were drawn in vivid detail by Mary Hallock Foote, the wife of Arthur DeWint Foote, the resident engineer from 1876. Her illustrated correspondence about New Almaden, "A California Mining Camp", appeared in the February 1878 issue of ''

Scribner's Monthly ''Scribner's Monthly: An Illustrated Magazine for the People'' was an illustrated American literary periodical published from 1870 until 1881. Following a change in ownership in 1881 of the company that had produced it, the magazine was relaunch ...

''. New Almaden also features prominently in her memoir '' A Victorian Gentlewoman in the Far West'', which was later fictionalized by

Wallace Stegner Wallace Earle Stegner (February 18, 1909 – April 13, 1993) was an American novelist, short story writer, environmentalist, and historian, often called "The Dean of Western Writers". He won the Pulitzer Prize in 1972 and the U.S. National Book ...

in his novel '' Angle of Repose.''

Environment

Mining operations resulted in mercury

pollution Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the ...

of the Guadalupe River and South

San Francisco Bay San Francisco Bay is a large tidal estuary in the U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the big cities of San Francisco, San Jose, and Oakland. San Francisco Bay drains water from a ...

, impacting birds and aquatic species. In 2005 the responsible parties, which include private companies and local government agencies, agreed to a legal settlement of approximately for restoration projects. The California Department of Fish and Wildlife and the

US Fish and Wildlife Service The United States Fish and Wildlife Service (USFWS or FWS) is an agency within the United States Department of the Interior dedicated to the management of fish, wildlife, and natural habitats. The mission of the agency is "working with othe ...

issued an environmental restoration plan for the area in 2008.

Geology

The mineralized area in the Almaden mining district where the New Almaden and the nearby Guadalupe mine are located is within the large

Franciscan Assemblage The Franciscan Complex or Franciscan Assemblage is a geologic term for a late Mesozoic terrane of heterogeneous rocks found throughout the California Coast Ranges, and particularly on the San Francisco Peninsula. It was named by geologist Andr ...

associated with the Coast Range. Quicksilver ore deposited by

hydrothermal Hydrothermal circulation in its most general sense is the circulation of hot water (Ancient Greek ὕδωρ, ''water'',Liddell, H.G. & Scott, R. (1940). ''A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with th ...

deposition of cinnabar from deep within the earth is found in a

gangue In mining, gangue () is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. It is thus distinct from overburden, which is the waste rock or materials overlying an ore or mineral body ...

of silica-carbonate rock formed locally by

hydrothermal alteration Metasomatism (from the Greek μετά ''metá'' "change" and σῶμα ''sôma'' "body") is the chemical alteration of a rock by hydrothermal and other fluids. It is the replacement of one rock by another of different mineralogical and chemical co ...

of serpentine. The Guadalupe mine produced about 10% as much mercury as the New Almaden. There are several smaller mines in the mining district, but their ore production was not significant. The only significant quicksilver ore is cinnabar; other sulfides are present in small quantities. Mining, other than a single placer deposit of cinnabar, was underground. There is a high probability of undiscovered high-grade ore which could be found and exploited using modern techniques.

New Almaden Mines

The entrances to the mines are closed off. After being identified as a Superfund site and after subsequent containment activities, the mining area can now be visited as part of the

Santa Clara County Santa Clara County, officially the County of Santa Clara, is the sixth-most populous county in the U.S. state of California, with a population of 1,936,259, as of the 2020 census. Santa Clara County and neighboring San Benito County together f ...

Almaden Quicksilver County Park. It was declared a

National Historic Landmark A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 places listed ...

in 1961. By the time

bought the mines in 1976 and ended operations, 1,137,727

flask Flask may refer to: Container * Hip flask, a small container used to carry a small amount of liquid * Laboratory flask, laboratory glassware for holding larger volumes than simple test tubes ** Erlenmeyer flask, a common laboratory flask wit ...

s totaling of mercury (worth more than US$70 million) had been extracted. The remains of a variety of structures left over from the 135 years of mining activity, including housing for the up to 1,800 miners, are scattered about the park, with the biggest concentration at what was known as English Camp, established by Cornish miners in the 1860s. Some structures were built later by the

U.S. Army Corps of Engineers , colors = , anniversaries = 16 June (Organization Day) , battles = , battles_label = Wars , website = , commander1 = ...

and there is a memorial honoring the

Civilian Conservation Corps The Civilian Conservation Corps (CCC) was a voluntary government work relief program that ran from 1933 to 1942 in the United States for unemployed, unmarried men ages 18–25 and eventually expanded to ages 17–28. The CCC was a major part of ...

firefighters who were stationed there for a time. Two

California Historical Landmark A California Historical Landmark (CHL) is a building, structure, site, or place in California that has been determined to have statewide historical landmark significance. Criteria Historical significance is determined by meeting at least one of ...

markers honor New Almaden Mine: #339 marks a cinnabar hill where Indians gathered pigment for paint, while #339-1 is near Arroyo de los Alamitos Creek where the actual mining of ore first occurred. There is also a museum adjacent at the site.

Almaden Quicksilver County Park

Almaden Quicksilver County Park is a 4,147 acre (17 km²)

park A park is an area of natural, semi-natural or planted space set aside for human enjoyment and recreation or for the protection of wildlife or natural habitats. Urban parks are urban green space, green spaces set aside for recreation inside t ...

that includes the grounds of former mercury ("quicksilver")

mine Mine, mines, miners or mining may refer to: Extraction or digging * Miner, a person engaged in mining or digging *Mining, extraction of mineral resources from the ground through a mine Grammar *Mine, a first-person English possessive pronoun ...

s. The park's

elevation The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § Vert ...

varies greatly: the most used entrances (on the east side of the park) are less than 600 feet (183 m) above

sea level Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardised g ...

, while the highest point in the park is over 1,700 feet (518 m) above sea level. During the coldest storms of the winter season, it is not uncommon for the high summits to receive a light dusting of snow (which usually melts by noon). The park is owned and managed by the

County of Santa Clara Santa Clara County, officially the County of Santa Clara, is the sixth-most populous county in the U.S. state of California, with a population of 1,936,259, as of the 2020 census. Santa Clara County and neighboring San Benito County together f ...

and its grounds also include the Guadalupe Reservoir; adjacent to the park is the

Almaden Reservoir Almaden Reservoir is an artificial lake in the hills south of San Jose, California in the United States. It borders on the Almaden Quicksilver County Park, which provides limited fishing ("catch-and-release"), picnicking, hiking, and horseback r ...

. The Casa Grande Almaden Quicksilver Mining Museum is located nearby.

Conversion from mines to park

In the period 1976 to 1978 the county developed a number of new large parks in rapid succession including

Grant Ranch Park Joseph D. Grant County Park is the largest county park in Santa Clara County, California. Also known as Grant Ranch Park, this site is situated in the Diablo Range foothills of the eastern Santa Clara Valley. The park is one of 28 owned by Santa ...

, Sanborn Park and Almaden Quicksilver County Park. Very soon after buying the mining property in 1976, Santa Clara County began planning for park usage, in an era where the county parks program was aggressively expanding. The county parks director envisioned a historic park where visitors could experience the mining past and also enjoy the

biodiversity Biodiversity or biological diversity is the variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic (''genetic variability''), species (''species diversity''), and ecosystem (''ecosystem diversity'') l ...

of the natural setting. Facilities plans were created and an Environmental Impact Report was prepared.David Crimp, Leda Patmore, C. Michael Hogan, Harry Seidman and Vivian Paparigian, ''Final Environmental Impact Report, Almaden Quicksilver Park'', prepared by Earth Metrics Inc. for the Santa Clara County Parks and Recreation Department (1976) Principal issues assessed in the park proposal: * biological impacts upon habitat by park users * water quality impacts to creeks draining the watershed * visual and drainage impacts of road improvements * historical analysis of mine usage

New Almaden Quicksilver Mining Museum

The New Almaden Quicksilver Mining Museum is located in the Casa Grande (big house) at 21350 Almaden Road in New Almaden. La Casa Grande, an 1854 revival-style mansion designed and built by architect Francis Myers, was the official residence and office of the mine superintendents, as well as a country retreat for wealthy mine investors. The mansion now serves as the site of the New Almaden Quicksilver Mining Museum, which contains exhibits about the history of mercury mining and the cultural history of the mining communities at New Almaden. The exhibits include a mine diorama of the interior of a mine shaft, mining equipment and technology, a mine manager's office with period displays, and artifacts from Cornish, Mexican and

Chinese Chinese can refer to: * Something related to China * Chinese people, people of Chinese nationality, citizenship, and/or ethnicity **''Zhonghua minzu'', the supra-ethnic concept of the Chinese nation ** List of ethnic groups in China, people of ...

mining families.

Notable residents

Pat Tillman Patrick Daniel Tillman Jr. (November 6, 1976 – April 22, 2004) was an American professional football player in the National Football League (NFL) who left his sports career and enlisted in the United States Army in May 2002 in the afterma ...

Arizona Cardinals The Arizona Cardinals are a professional American football team based in the Phoenix metropolitan area. The Cardinals compete in the National Football League (NFL) as a member of the National Football Conference (NFC) West division, and play t ...

All-Pro safety

References

External links

Almaden Quicksilver County ParkVolunteer Organization supporting the Park, includes more information about the park and museum
*

- Chapter 6 of "Scenes of Wonder and Curiosity in California" (1862) by

James Mason Hutchings James Mason Hutchings (February 10, 1820 – October 31, 1902) was an American businessman and one of the principal promoters of what is now Yosemite National Park. Biography Born in Towcester in England, Hutchings immigrated to the U.S. i ...

- description of life and operations at the mine site during the 1860s
Guide to the Papers Relating to Quicksilver Mining, (ca. 1849-1894)
at

The Bancroft Library The Bancroft Library in the center of the campus of the University of California, Berkeley, is the university's primary special-collections library. It was acquired from its founder, Hubert Howe Bancroft, in 1905, with the proviso that it retai ...

New Almaden Mine (Calif.) Collection, 1845-1973
housed at Stanford University Libraries {{National Register of Historic Places Mining in California Mercury mines in the United States Underground mines in the United States New Almaden Quicksilver Mining Museum New Almaden Quicksilver Mining Museum New Almaden Quicksilver Mining Museum History of Santa Clara County, California National Historic Landmarks in California National Register of Historic Places in Santa Clara County, California Parks in the San Francisco Bay Area Parks in Santa Clara County, California Regional parks in California Industrial buildings and structures on the National Register of Historic Places in California 1854 establishments in California Ghost towns in the San Francisco Bay Area 1861 establishments in California