Mines in San Benito County, California

San Benito County, California has 277 mine and mineral deposit locations documented in federal records from the USGS and MSHA. 60 of these are currently active mining operations. The most commonly recorded commodity is mercury, with 90 sites. The table below lists all recorded mines in the county with links to individual site details.

All Mines in San Benito County

Mine	Commodity	Type	Status	Source
A R Wilson Quarry	Crushed, Broken Granite	Surface	Active	MSHA
Plant 25	Construction Sand and Gravel	Surface	Active	MSHA
Renewable Resources	Construction Sand and Gravel	Surface	Active	MSHA
Southside Sand and Gravel	Construction Sand and Gravel	Surface	Active	MSHA
Ambrose	Antimony		Producer	MRDS
Arthur R. Wilson Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Ashurst-Lewis Pit	Bentonite	Surface	Producer	MRDS
Bixby Lane Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Bolsa Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Butte Mine	Mercury		Producer	MRDS
Central San Benito	Mercury		Producer	MRDS
Dallas Mining Co.	Gemstone		Producer	MRDS
Dar Prospect	Mercury		Producer	MRDS
Dooley Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Dunne Quarries	Gypsum-Anhydrite		Producer	MRDS
Five Oaks Ranch Pit	Gypsum-Anhydrite	Surface	Producer	MRDS
French Ranch	Antimony		Producer	MRDS
Hannagan Ranch Deposit	Manganese		Producer	MRDS
Harris Ranch Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Harrison Deposit	Chromium		Producer	MRDS
Hawkins Mine	Manganese		Producer	MRDS
Hines Deposit	Chromium		Producer	MRDS
Hollister Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Hollister San Benito Sand Plant	Sand and Gravel, Construction	Surface	Producer	MRDS
Hospital Road Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Ideal Cement Company	Limestone, General	Processing Plant	Producer	MRDS
Joe 5 Pit	Asbestos	Surface	Producer	MRDS
Logan Quarry and Mill	Stone		Producer	MRDS
Mule Shoe Ranch	Gypsum-Anhydrite		Producer	MRDS
Nash Road Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
New Idria	Mercury		Producer	MRDS
New Idria	Asbestos		Producer	MRDS
New Idria	Mercury		Producer	MRDS
New Idria - Creek Pit	Mercury		Producer	MRDS
New Idria - San Carlos Mine	Mercury		Producer	MRDS
New Idria Group	Mercury		Producer	MRDS
New Idria Mine	Mercury		Producer	MRDS
New Idria Mine	Mercury	Underground	Producer	MRDS
New Tirado	Mercury		Producer	MRDS
Pacific Claim of Stayton Group	Mercury		Producer	MRDS
Paicines Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Paicines Plant No. 7	Sand and Gravel, Construction	Surface	Producer	MRDS
Pearce Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
Quicksilver & Antimony Deposits	Silver, Antimony, Mercury		Producer	MRDS
Quien Sabe	Antimony, Mercury		Producer	MRDS
Quien Sabe	Antimony		Producer	MRDS
Sampson Magnesite Mine	Magnesite		Producer	MRDS
Sann Juan Pit #6	Sand and Gravel, Construction	Surface	Producer	MRDS
Santa Rita	Asbestos	Surface	Producer	MRDS
Shriver	Antimony		Producer	MRDS
Stayton-Santa Clara Claim	Antimony		Producer	MRDS
Tres Pinos Creek Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Tres Pinos Pit	Sand and Gravel, Construction	Surface	Producer	MRDS
Trinity Deposit	Chromium		Producer	MRDS
Union Carbide	Asbestos	Surface	Producer	MRDS
Union Carbide Nuclear	Asbestos		Producer	MRDS
Unnamed Location	Copper		Producer	MRDS
Vallecitos Clay Mine	Bentonite	Surface	Producer	MRDS
Westvaco	Magnesite		Producer	MRDS
Williams Quarry	Stone, Crushed/Broken	Surface	Producer	MRDS
A.s. and R. Deposit	Limestone, General		Prospect	MRDS
Alpine	Mercury		Past Producer	MRDS
Alpine Deposit	Chromium		Occurrence	MRDS
Alpine Mine	Mercury	Surface	Past Producer	MRDS
Alvarez & Tully Deposit	Gypsum-Anhydrite	Surface	Past Producer	MRDS
Ambrose Mine	Antimony	Underground	Past Producer	MRDS
Antelope	Copper		Past Producer	MRDS
Antelope Copper Mine	Copper	Surface-Underground	Prospect	MRDS
Asbestos Ridge Mine	Asbestos	Surface	Unknown	MRDS
Aurora Mine	Mercury		Past Producer	MRDS
Aurora Mine	Mercury	Surface	Past Producer	MRDS
Aurora Quicksilver Mine	Chromium		Past Producer	MRDS
Barbee Ranch Deposits	Stone, Crushed/Broken		Prospect	MRDS
Berbich Gravel Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Berg Copper Prospect	Copper	Surface-Underground	Prospect	MRDS
Bird Canyon Ledge	Limestone, General		Occurrence	MRDS
Bitter Water	Mercury		Past Producer	MRDS
Bitter Water Mine	Mercury	Underground	Past Producer	MRDS
Bobcat A, & Alta Anchor Claims		Surface	Past Producer	MRDS
Bonanza Quicksilver Mine	Mercury		Occurrence	MRDS
Bradford	Mercury		Past Producer	MRDS
Breen			Occurrence	MRDS
Breen Group	Mercury	Surface	Past Producer	MRDS
Bright Future Claims	Chromium	Surface	Occurrence	MRDS
Buena Vista Prospect	Chromium		Occurrence	MRDS
Buena Vista Prospect	Chromium		Occurrence	MRDS
Butte Mine	Mercury	Underground	Past Producer	MRDS
Butts	Mercury		Past Producer	MRDS
Cal Rock Products Llc	Crushed, Broken Limestone NEC	Surface	Intermittent	MSHA
Cannon			Occurrence	MRDS
Cannon Prospect	Mercury	Underground	Prospect	MRDS
Cerro Bonito	Mercury		Past Producer	MRDS
Cerro Bonito Mine	Mercury	Underground	Past Producer	MRDS
Cerro Gordo			Occurrence	MRDS
Chalone and Defiance Mines	Gold	Underground	Prospect	MRDS
Chambers			Occurrence	MRDS
Chambers Deposit	Gypsum-Anhydrite		Occurrence	MRDS
Chambers Deposit			Prospect	MRDS
Clear Creek Cromite Placer	Chromium	Placer	Prospect	MRDS
Copper Mountain	Copper		Past Producer	MRDS
Copper Mountain Mining Co.	Copper	Surface-Underground	Past Producer	MRDS
Cowell-Thompson Creek Deposit	Limestone, General	Surface	Past Producer	MRDS
Dallas Mining Co.	Gemstone	Underground	Past Producer	MRDS
Dar	Mercury		Past Producer	MRDS
Dar Prospect	Mercury	Surface	Prospect	MRDS
Dolomite Occurrence	Magnesite		Occurrence	MRDS
Dr. J. M. O'Donnell Deposit	Clay		Occurrence	MRDS
Dunne Quarries	Gypsum-Anhydrite	Surface	Past Producer	MRDS
El Cajon	Mercury		Past Producer	MRDS
El Cajon	Mercury	Surface	Prospect	MRDS
El Rey	Mercury		Past Producer	MRDS
Elkafajo	Mercury		Past Producer	MRDS
Elkafajo	Mercury		Unknown	MRDS
Elma Queen	Chromium		Occurrence	MRDS
Ely Rey Mine	Mercury	Underground	Past Producer	MRDS
Flint Group	Mercury		Past Producer	MRDS
Flint Group	Mercury	Underground	Past Producer	MRDS
Flint-Steinbeck Deposit	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Florence Mac	Mercury		Past Producer	MRDS
Florence Mine Group	Antimony		Occurrence	MRDS
Fries Ranch			Occurrence	MRDS
Fries Ranch Mine		Underground	Prospect	MRDS
Garner-Harris Deposits	Limestone, General		Occurrence	MRDS
Gleason Mine	Antimony	Underground	Prospect	MRDS
Gold Occureence	Gold		Occurrence	MRDS
Granite Rock Quarry	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Unknown	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Gravel Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Gravel Pits	Sand and Gravel, Construction	Surface	Unknown	MRDS
H.g. Quicksilver Mine	Mercury	Surface-Underground	Prospect	MRDS
Hamilton Deposit	Limestone, General		Past Producer	MRDS
Hamilton Deposit	Limestone, General	Surface	Past Producer	MRDS
Hannagan Ranch Deposit		Surface	Prospect	MRDS
Harlan Limestone Deposit	Limestone, General		Past Producer	MRDS
Harlan Limestone Deposit	Limestone, General	Surface	Past Producer	MRDS
Harmony Hills Deposit	Limestone, General		Occurrence	MRDS
Harrison Deposit	Chromium		Occurrence	MRDS
Hawkins Mine		Surface	Past Producer	MRDS
Hendricks Mine			Occurrence	MRDS
Hendricks Mine		Surface-Underground	Past Producer	MRDS
Hines Deposits	Chromium		Occurrence	MRDS
Hollister Dolamite Quarry		Surface	Past Producer	MRDS
Hollister Pit and Mill. Plant No 12	Sand and Gravel, Construction	Processing Plant	Past Producer	MRDS
Holthouse Ranch	Uranium		Occurrence	MRDS
Ingalls	Chromium		Occurrence	MRDS
Ingalls Deposit	Chromium		Occurrence	MRDS
Lea - Grant	Mercury		Past Producer	MRDS
Lea-Grant Mine	Mercury	Underground	Past Producer	MRDS
Lewis & Clark Claim	Copper	Underground	Prospect	MRDS
Lewis Ranch			Occurrence	MRDS
Lewis Ranch			Occurrence	MRDS
Lewis and Clark Claim			Occurrence	MRDS
Lone Oak	Mercury		Past Producer	MRDS
Lone Oak Mine	Mercury	Surface	Past Producer	MRDS
Lone Star	Mercury		Past Producer	MRDS
Lone Star Mine	Mercury	Underground	Prospect	MRDS
Lucky Strick Mine	Mercury	Underground	Past Producer	MRDS
Lucky Strike	Mercury		Past Producer	MRDS
Mariposa	Mercury		Past Producer	MRDS
Mariposa Mine	Mercury	Underground	Prospect	MRDS
Martin Ranch Deposits	Limestone, General	Underground	Prospect	MRDS
Mc Creary Ranch			Occurrence	MRDS
McCray Deposit	Chromium		Occurrence	MRDS
McCray Property	Chromium	Surface	Prospect	MRDS
McCray Ranch Deposits	Limestone, General		Occurrence	MRDS
McCreary Ranch		Surface	Prospect	MRDS
Middle Dam Deposit	Magnesite		Prospect	MRDS
Mitchell	Mercury		Past Producer	MRDS
Mitchell Prospect	Mercury	Surface-Underground	Prospect	MRDS
Mule Shoe Mine	Sand, Industrial NEC	Facility	Abandoned	MSHA
Mule Shoe Ranch	Gypsum-Anhydrite	Surface	Past Producer	MRDS
New Idria - Molina Mine	Mercury		Past Producer	MRDS
New Idria - Ranchito	Mercury		Past Producer	MRDS
New Idria - Sulfur Spring	Mercury		Past Producer	MRDS
New Idria Mine	Mercury		Unknown	MRDS
New Tirado Mine	Mercury	Surface	Past Producer	MRDS
Nickel Magnesium Group	Nickel		Occurrence	MRDS
North Star	Mercury		Past Producer	MRDS
North Star	Mercury	Surface	Prospect	MRDS
North Star Mine	Mercury	Underground	Past Producer	MRDS
Paicines Clay Deposits	Clay		Prospect	MRDS
Palmtag-Harris Ranch Deposits	Limestone, General		Occurrence	MRDS
Parker - Carlson	Mercury		Past Producer	MRDS
Parker-Carlson	Mercury	Surface	Prospect	MRDS
Picacho	Mercury		Past Producer	MRDS
Pinnacles National Monument	Uranium		Occurrence	MRDS
Power Line Deposits	Limestone, General		Occurrence	MRDS
Prospects	Asbestos		Occurrence	MRDS
Prospects	Asbestos		Occurrence	MRDS
Prospects	Asbestos		Occurrence	MRDS
Quarry	Stone	Surface	Prospect	MRDS
Quien Sabe Mine	Antimony	Underground	Prospect	MRDS
Quilty Deposit	Iron		Occurrence	MRDS
Ramirez Consolidated Mine	Mercury	Underground	Past Producer	MRDS
Reeves Northeast Deposits	Limestone, General		Occurrence	MRDS
Reported Collection Area	Gemstone		Occurrence	MRDS
Reported Deposit	Diatomite		Occurrence	MRDS
Reported Occurrence	Antimony		Occurrence	MRDS
Reported Occurrence	Chromium		Occurrence	MRDS
Reported Occurrence	Mercury		Occurrence	MRDS
Reported Occurrence	Iron		Occurrence	MRDS
Reported Occurrence	Mercury		Occurrence	MRDS
Reported Occurrence	Iron		Occurrence	MRDS
Reported Occurrence	Mercury		Occurrence	MRDS
Reported Occurrence	Mercury		Occurrence	MRDS
Reported Occurrences	Mercury		Occurrence	MRDS
Reported Occurrences	Mercury		Occurrence	MRDS
Reported Occurrences	Chromium		Occurrence	MRDS
Rider Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Riley Ranch	Copper		Unknown	MRDS
Rip Van Winkle Mine	Antimony	Underground	Past Producer	MRDS
S. L. Mead Chromite	Chromium		Occurrence	MRDS
Sampson Magnesite Mine	Magnesite	Surface	Past Producer	MRDS
San Benito	Limestone, General		Past Producer	MRDS
San Benito Asbestos Co.	Asbestos	Surface	Past Producer	MRDS
San Benito Deposit	Iron		Occurrence	MRDS
San Benito Deposit	Iron	Surface	Occurrence	MRDS
San Benito Lime Deposit	Limestone, General	Surface	Past Producer	MRDS
San Benito No. 1		Surface	Past Producer	MRDS
San Benito Soap Mine	Bentonite	Surface	Past Producer	MRDS
San Carlos Mine	Mercury	Surface	Prospect	MRDS
San Domingo Palito	Chromium		Occurrence	MRDS
San Domingo Palito Deposit	Chromium		Occurrence	MRDS
San Juan Diaz Pit	Sand and Gravel, Construction	Surface	Past Producer	MRDS
San Juan Pit Mill	Construction Sand and Gravel	Surface	Abandoned	MSHA
Santa Marguerita	Mercury		Past Producer	MRDS
Santa Rita	Chromium		Occurrence	MRDS
Santa Rita Deposit	Chromium		Occurrence	MRDS
Shriver Mine	Antimony	Underground	Past Producer	MRDS
Silver Creek Deposit	Gypsum-Anhydrite		Occurrence	MRDS
Spanish	Mercury		Past Producer	MRDS
Spanish Claim	Mercury	Surface	Past Producer	MRDS
St. Thomas Mine	Asbestos	Surface	Prospect	MRDS
Standard Group	Magnesite		Occurrence	MRDS
Stayton Quicksilver Mine	Mercury	Underground	Past Producer	MRDS
Stayton-Santa Clara Claim	Antimony	Underground	Past Producer	MRDS
Sulphur Springs Mine	Mercury	Underground	Unknown	MRDS
Tirado	Mercury		Past Producer	MRDS
Tirado & Shear Group	Mercury	Surface	Prospect	MRDS
Tirado Chrome	Chromium	Underground	Past Producer	MRDS
Tirado Mine	Mercury	Surface	Past Producer	MRDS
Tirado and Shear	Mercury		Past Producer	MRDS
Trinity Deposit	Chromium		Occurrence	MRDS
Tully Deposit	Gypsum-Anhydrite		Occurrence	MRDS
Underwood Deposits	Limestone, General		Past Producer	MRDS
Underwood Deposits	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Unidentified Gravel Pits	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Unnamed	Sand and Gravel, Construction	Surface	Past Producer	MRDS
Unnamed Adit	Mercury	Underground	Prospect	MRDS
Unnamed Adit	Mercury	Underground	Prospect	MRDS
Unnamed Barite Prospect	Barium-Barite	Surface	Past Producer	MRDS
Unnamed Location	Stone, Crushed/Broken		Prospect	MRDS
Unnamed Location	Asbestos	Surface	Occurrence	MRDS
Unnamed Location	Copper	Underground	Past Producer	MRDS
Unnamed Placer	Mercury	Placer	Occurrence	MRDS
Unnamed Prospect			Occurrence	MRDS
Unnamed Prospect	Mercury		Prospect	MRDS
Unnamed Prospect	Asbestos	Surface	Prospect	MRDS
Unnamed Prospects	Mercury		Occurrence	MRDS
Unnamed Quarry	Stone		Occurrence	MRDS
Unnamed Quarry	Stone, Crushed/Broken	Surface	Past Producer	MRDS
Unnamed Quarry	Stone	Surface	Past Producer	MRDS
Unnamed Shaftrrence	Mercury	Underground	Prospect	MRDS
Upper Bird Creek Deposit	Limestone, General		Occurrence	MRDS
Vineyard Rock	Crushed, Broken Stone NEC	Surface	Intermittent	MSHA
Valdez Bros. Chrome	Chromium		Past Producer	MRDS
Vallecitos Deposits	Clay		Past Producer	MRDS
Valley View	Mercury		Past Producer	MRDS
Valley View Mine	Mercury	Surface	Past Producer	MRDS
Williams Pit	Construction Sand and Gravel	Surface	Intermittent	MSHA
Wilbur Ellis Co. Bentonite Deposit	Bentonite	Surface	Unknown	MRDS
Wonder	Mercury		Past Producer	MRDS
Wonder Mine	Mercury	Underground	Past Producer	MRDS
Yturriarte	Mercury		Past Producer	MRDS
Yturriarte Mine	Mercury		Past Producer	MRDS