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MSHA mine register by county

Mines in Ventura County, California

Ventura County, California has 34 mines on MSHA's register: 10 active, 24 abandoned. 1 miner has died and 520 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,723 citations.

Every mine MSHA has registered in Ventura 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 Ventura County →

Mines on register
34
Active
10
Fatalities on record
1
Citations issued
1,723
2 underground · 31 surface · 1 facilities 0 coal · 34 metal and non-metal 24 abandoned 520 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.
Ventura County, California · Population 838,259
0.2%
Mining share of county employment
$107,327
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
Southern Pacific Milling Company 4 0 1
MRC Rock & Sand, LLC. 2 1 0
P W Gillibrand Company 2 1 0
ARCOSA LWFP, LLC 1 1 0
Best Rock Products Corp 1 0 0
Calmat Company 1 0 0
Calmat Company 1 0 0
CalPortland 1 1 0
CEMEX Construction Materials Pacific, LLC 1 1 0
D W Burhoe Construction Inc 1 0 0
Mines in Ventura County34 on register
  1. Canyon Rock Plant
    Surface metal/non-metal · Gillibrand Industrial Sands, LLC · MSHA ID 0401888
    Active
  2. Arcosa Frazier Park Plant# 1603
    Surface metal/non-metal · ARCOSA LWFP, LLC · MSHA ID 0400555
    Active
  3. Moorpark Quarry
    Surface metal/non-metal · CEMEX Construction Materials Pacific, LLC · MSHA ID 0404140
    Active
  4. Grimes Rock a CalPortland Company
    Surface metal/non-metal · CalPortland · MSHA ID 0405432
    Active
  5. Wayne J. Sand & Gravel Inc.
    Surface metal/non-metal · Wayne J. Sand & Gravel Inc. · MSHA ID 0401915
    Active
  6. Pacific Rock Inc
    Surface metal/non-metal · Pacific Rock Inc · MSHA ID 0401614
    Active
  7. Santa Paula Materials
    Surface metal/non-metal · Santa Paula Materials · MSHA ID 0405798
    Active
  8. Ojai Quarry
    Surface metal/non-metal · MRC Rock & Sand, LLC. · MSHA ID 0405229
    Active
  9. S-6 Red
    Surface metal/non-metal · Upland Rock · MSHA ID 0405834
    Active
  10. Tapo Rock & Sand
    Surface metal/non-metal · Tapo Rock & Sand · MSHA ID 0404212
    Active
  11. EL RIO PIT & MILL
    Surface metal/non-metal · Southern Pacific Milling Company · MSHA ID 0401956
    Abandoned
  12. SATICOY PLANT
    Surface metal/non-metal · Calmat Company · MSHA ID 0401740
    Abandoned
  13. Speciality Sand Plant
    Facility metal/non-metal · P W Gillibrand Company · MSHA ID 0405134
    Abandoned
  14. Ventucopa Quarry
    Surface metal/non-metal · H Lima Company Inc · MSHA ID 0405481
    Abandoned
  15. Best Rock Products Corp
    Surface metal/non-metal · Best Rock Products Corp · MSHA ID 0400118
    Abandoned
  16. Briggs Road Plant
    Surface metal/non-metal · Southern Pacific Milling Company · MSHA ID 0404823
    Abandoned
  17. SANTA PAULA REACH II
    Surface metal/non-metal · Ogden Constructors Inc · MSHA ID 0405373
    Abandoned and Sealed
  18. Santa Paula Plant
    Surface metal/non-metal · Livingston-Graham · MSHA ID 0401841
    Abandoned
  19. Ventura River Pit & Mill
    Surface metal/non-metal · Southern Pacific Milling Company · MSHA ID 0401957
    Abandoned
  20. Runkle Canyon Pit & Mill
    Surface metal/non-metal · Southern Pacific Milling Company · MSHA ID 0402104
    Abandoned
  21. Sespe Rock Products
    Surface metal/non-metal · Sespe Rock Products Inc · MSHA ID 0404706
    Abandoned
  22. Limo Rock Remediation
    Surface metal/non-metal · MRC Rock & Sand, LLC. · MSHA ID 0405935
    Abandoned
  23. Sherwood
    Surface metal/non-metal · D W Burhoe Construction Inc · MSHA ID 0405024
    Abandoned
  24. Santa Paula Plant
    Surface metal/non-metal · Calmat Company · MSHA ID 0404824
    Abandoned
  25. P.F. Hofmeister Construction, Inc.
    Surface metal/non-metal · P.F. Hofmeister Construction, Inc. · MSHA ID 0405688
    Abandoned
  26. Frazier Mine
    Underground metal/non-metal · Frazier Gold Partners · MSHA ID 0404454
    Abandoned
  27. Long Dave
    Underground metal/non-metal · Long Dave Enterprises · MSHA ID 0404344
    Abandoned
  28. Robuck/Schmidt Quarry
    Surface metal/non-metal · Robuck Construction Inc · MSHA ID 0404332
    Abandoned
  29. Rocklite Pit & Mill
    Surface metal/non-metal · Lightweight Processing Company · MSHA ID 0400553
    Abandoned
  30. Santa Barbara Portable Plant
    Surface metal/non-metal · Granite Construction Company · MSHA ID 0404339
    Abandoned
  31. Somis Pit
    Surface metal/non-metal · Somis Sand & Rock Inc · MSHA ID 0401951
    Abandoned
  32. Stinky Rock & Sand
    Surface metal/non-metal · Stinky Rock & Sand · MSHA ID 0404533
    Abandoned
  33. Tapo Oyster Shell
    Surface metal/non-metal · Tapo Oyster Shell · MSHA ID 0403763
    Abandoned
  34. Ventura County Rock Corporation
    Surface metal/non-metal · Ventura County Rock Corp · MSHA ID 0405128
    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.