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MSHA mine register by county

Mines in San Benito County, California

San Benito County, California has 30 mines on MSHA's register: 5 active, 2 intermittent, 22 abandoned. 390 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,355 citations.

Every mine MSHA has registered in San Benito County, working or not, with the accident, fatality and citation record each one carries on this site. Active mines are listed first, then the rest by the weight of their record.

Abandoned and historical mine features in San Benito County →

Mines on register
30
Active
5
Fatalities on record
0
Citations issued
1,355
0 underground · 29 surface · 1 facilities 0 coal · 30 metal and non-metal 2 intermittent 22 abandoned 390 reported accidents, 1983–2026
Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
San Benito County, California · Population 66,056
0.0%
Mining share of county employment
$108,289
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
On the map 
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MSHA-registered mine, any status

Mines plot only where MSHA holds a surveyed coordinate for the site; mines the agency locates to a town, county or state centroid are in the counts and the list above but not drawn. Click a point for the mine's status and record.

Operators with the most mines herecurrent operator of record
Operator Mines Active Fatalities
Granite Rock Company 4 2 0
Hillsdale Rock Company Inc 3 0 0
South Bay Sand & Gravel 2 0 0
Buffalo Gypsum Inc 1 0 0
Cal Rock Products LLC 1 0 0
California Rock Crusher Corp 1 0 0
Custom Rock Products Inc 1 0 0
Don Chapin Company Inc 1 1 0
Don Rider & Son 1 0 0
Evergreen Concrete Inc 1 0 0
Mines in San Benito County30 on register
  1. A R Wilson Quarry
    Surface metal/non-metal · Granite Rock Co · MSHA ID 0400119
    Active
  2. Southside Sand And Gravel
    Surface metal/non-metal · Granite Rock Company · MSHA ID 0405164
    Active
  3. PLANT 25
    Surface metal/non-metal · Don Chapin Company Inc · MSHA ID 0404647
    Active
  4. Renewable Resources
    Surface metal/non-metal · Renewable Resources · MSHA ID 0405601
    Active
  5. VINEYARD ROCK
    Surface metal/non-metal · Vineyard Rock Products · MSHA ID 0405619
    Active
  6. Cal Rock Products LLC
    Surface metal/non-metal · Cal Rock Products LLC · MSHA ID 0400111
    Intermittent
  7. San Juan Pit Mill
    Surface metal/non-metal · Hillsdale Rock Company Inc · MSHA ID 0402781
    Abandoned
  8. WILLIAMS PIT
    Surface metal/non-metal · Stevens Creek Quarry Inc · MSHA ID 0405354
    Temporarily Idled
  9. Mule Shoe Mine
    Facility metal/non-metal · Buffalo Gypsum Inc · MSHA ID 0405250
    Abandoned
  10. San Juan Asphalt
    Surface metal/non-metal · San Juan Asphalt · MSHA ID 0404896
    Abandoned
  11. JOE 5 PIT
    Surface metal/non-metal · Kcac Inc · MSHA ID 0402550
    Abandoned
  12. Portable Plant #2
    Surface metal/non-metal · California Rock Crusher Corp · MSHA ID 0405715
    Intermittent
  13. PAICINES PIT
    Surface metal/non-metal · San Benito Supply · MSHA ID 0404646
    Abandoned
  14. Pearce Quarry
    Surface metal/non-metal · Grade-Way Construction · MSHA ID 0404736
    Abandoned
  15. San Benito Sand Plant
    Surface metal/non-metal · Granite Rock Company · MSHA ID 0404270
    Abandoned
  16. Anzar Quarry
    Surface metal/non-metal · South Bay Sand & Gravel · MSHA ID 0404919
    Abandoned
  17. Bitterwater Quarry
    Surface metal/non-metal · Parsons Ag Minerals · MSHA ID 0404961
    Abandoned
  18. Cienega Pit And Mill
    Surface metal/non-metal · Don Rider & Son · MSHA ID 0401752
    Abandoned
  19. Harrison Ranch Limestone Quarry
    Surface metal/non-metal · Granite Rock Company · MSHA ID 0404899
    Abandoned
  20. Hillsdale Paicines Pit
    Surface metal/non-metal · Custom Rock Products Inc · MSHA ID 0404658
    Abandoned
  21. New Idria Mines
    Surface metal/non-metal · Idria Minerals Corp · MSHA ID 0402609
    Abandoned
  22. Pacheco Pit
    Surface metal/non-metal · Granite Construction Company · MSHA ID 0404714
    Abandoned
  23. Paicines Plant
    Surface metal/non-metal · Hillsdale Rock Company · MSHA ID 0404948
    Abandoned
  24. Paicines Plant No 7
    Surface metal/non-metal · Hillsdale Rock Company · MSHA ID 0404252
    Abandoned
  25. Paicines Quarry
    Surface metal/non-metal · South Bay Sand & Gravel · MSHA ID 0404920
    Abandoned
  26. San Juan Pit
    Surface metal/non-metal · Evergreen Concrete Inc · MSHA ID 0404340
    Abandoned
  27. San Juan Sand Pit
    Surface metal/non-metal · William Caprista Underground Construction Inc · MSHA ID 0404325
    Abandoned
  28. SANDMAN INC.
    Surface metal/non-metal · Star Concrete · MSHA ID 0401809
    Abandoned
  29. Vallecitos Clay Mine
    Surface metal/non-metal · Leonard W Knepper · MSHA ID 0400606
    Abandoned
  30. Williams Sand Pit
    Surface metal/non-metal · Mel Williams Sand & Gravel Inc · MSHA ID 0403817
    Abandoned

Status, type and operator are as reported to MSHA. Fatality and accident counts are MSHA's reportable accident records for the mine; citations are inspector-issued violations on record. Each mine's own page carries the full detail.

Other counties in CaliforniaAll counties →
How to read these numbers

The register is MSHA's Mine Data Retrieval System: every operation ever assigned a mine ID, including ones abandoned decades ago, so the count is a history of mining in the county, not a count of working mines. A mine's county is the one its operator reported to MSHA. Fatality and accident counts start with MSHA's reportable-accident records (1983 onward); citation counts are inspector-issued violations on record. We are an independent research tool, not MSHA.