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MSHA mine register by county

Mines in Sonoma County, California

Sonoma County, California has 36 mines on MSHA's register: 6 active, 1 intermittent, 29 abandoned. 1 miner has died and 353 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,118 citations.

Every mine MSHA has registered in Sonoma 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 Sonoma County →

Mines on register
36
Active
6
Fatalities on record
1
Citations issued
1,118
0 underground · 33 surface · 3 facilities 0 coal · 36 metal and non-metal 1 intermittent 29 abandoned 353 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.
Sonoma County, California · Population 485,642
0.0%
Mining share of county employment
$102,840
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
Syar Industries Inc 4 0 0
Stony Point Rock Quarry Inc 3 1 0
BoDean Company Inc 2 2 0
Canyon Rock Co., Inc 2 2 0
H G I Sand & Gravel Inc 2 0 0
Piombo Construction Company 2 0 0
Shamrock Materials Inc 2 0 0
Sonoma Rock Company 1 0 1
BCJ Sand and Rock Inc 1 0 0
Bed Rock Products Inc 1 0 0
Mines in Sonoma County36 on register
  1. Mark West Quarry
    Surface metal/non-metal · BoDean Co Inc · MSHA ID 0400600
    Active
  2. Canyon Rock Co Inc
    Surface metal/non-metal · Canyon Rock Co Inc · MSHA ID 0400079
    Active
  3. Soiland Co., Inc.
    Surface metal/non-metal · Soiland Co., Inc. · MSHA ID 0400284
    Active
  4. Diamond T Natural Resources, LLC
    Surface metal/non-metal · Canyon Rock Co., Inc · MSHA ID 0404981
    Active
  5. Blue Rock Quarry
    Surface metal/non-metal · BoDean Company Inc · MSHA ID 0400276
    Active
  6. Roblar Quarry LLC
    Facility metal/non-metal · Roblar Quarry LLC · MSHA ID 0405975
    Active
  7. Healdsburg Main Plant
    Facility metal/non-metal · Syar Industries Inc · MSHA ID 0401700
    Abandoned
  8. Sonoma Rock Company
    Surface metal/non-metal · Sonoma Rock Company · MSHA ID 0404988
    Abandoned
  9. Windsor
    Surface metal/non-metal · Hanson Aggregates West Inc · MSHA ID 0401825
    Abandoned
  10. Lind Marine Incorporated
    Facility metal/non-metal · Lind Marine Incorporated · MSHA ID 0405003
    Abandoned
  11. Petaluma Quarry
    Surface metal/non-metal · Dutra Materials · MSHA ID 0400131
    Abandoned
  12. SOILS PLUS
    Surface metal/non-metal · Soiland Co., Inc. · MSHA ID 0404638
    Intermittent
  13. Windsor Plant No 3
    Surface metal/non-metal · Kaiser Sand & Gravel Company · MSHA ID 0401801
    Abandoned
  14. Cloverdale Plant
    Surface metal/non-metal · Shamrock Materials Inc · MSHA ID 0404977
    Abandoned
  15. Twin Bridges
    Surface metal/non-metal · Bed Rock Products Inc · MSHA ID 0402786
    Abandoned
  16. BCJ Mobile
    Surface metal/non-metal · BCJ Sand and Rock Inc · MSHA ID 0405704
    Abandoned
  17. Nuns Canyon Rock LLC
    Surface metal/non-metal · Nuns Canyon Rock LLC · MSHA ID 0402836
    Abandoned
  18. STONY POINT ROCK QUARRY, INC.
    Surface metal/non-metal · Stony Point Rock Quarry Inc · MSHA ID 0404982
    Abandoned
  19. Dewitt Sand & Gravel
    Surface metal/non-metal · Jerry Dewitt Trucking Inc · MSHA ID 0404979
    Abandoned
  20. Portable Plant
    Surface metal/non-metal · Shamrock Materials Inc · MSHA ID 0405215
    Abandoned
  21. Bloomfield
    Surface metal/non-metal · Piombo Corp · MSHA ID 0402305
    Abandoned
  22. Doyle Plant
    Surface metal/non-metal · Syar Industries Inc · MSHA ID 0402790
    Abandoned
  23. Geyserville Aggregates
    Surface metal/non-metal · Piombo Construction Company · MSHA ID 0404130
    Abandoned
  24. Guerneville Aggregates
    Surface metal/non-metal · Piombo Corp · MSHA ID 0404298
    Abandoned
  25. Healdsburg Sand & Gravel
    Surface metal/non-metal · Syar Industries Inc · MSHA ID 0401921
    Abandoned
  26. Healdsburg Sand & Gravel
    Surface metal/non-metal · Syar Industries Inc · MSHA ID 0402700
    Abandoned
  27. Irwindale Plant
    Surface metal/non-metal · Manning Brothers Rock & Sand Co Inc · MSHA ID 0401849
    Abandoned
  28. Shiloh Aggregates
    Surface metal/non-metal · Piombo Construction Company · MSHA ID 0404717
    Abandoned
  29. Soda Rock Pit And Mill
    Surface metal/non-metal · H G I Sand & Gravel Inc · MSHA ID 0401922
    Abandoned
  30. Soda Rock Pit And Mill No 2
    Surface metal/non-metal · H G I Sand & Gravel Inc · MSHA ID 0404220
    Abandoned
  31. Spaletta Quarry
    Surface metal/non-metal · Spaletta Ranch · MSHA ID 0405000
    Abandoned
  32. Trinity Quarry
    Surface metal/non-metal · Trinity Quarries Inc · MSHA ID 0402352
    Abandoned
  33. Trinity Quarry
    Surface metal/non-metal · Bob Ford & Son · MSHA ID 0404975
    Abandoned
  34. Trinity Rock Pit And Mill
    Surface metal/non-metal · Trinity Rock Company · MSHA ID 0404210
    Abandoned
  35. Water Shed Quarry
    Surface metal/non-metal · Ghilotti Brothers Construction · MSHA ID 0404781
    Abandoned
  36. Zamaroni Quarry
    Surface metal/non-metal · Zamaroni Quarry Inc · MSHA ID 0402381
    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.