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MSHA mine register by county

Mines in Los Angeles County, California

Los Angeles County, California has 95 mines on MSHA's register: 16 active, 79 abandoned. 7 miners have died and 1,397 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 2,927 citations.

Every mine MSHA has registered in Los Angeles 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 Los Angeles County →

Mines on register
95
Active
16
Fatalities on record
7
Citations issued
2,927
3 underground · 82 surface · 10 facilities 0 coal · 95 metal and non-metal 79 abandoned 1,397 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.
Los Angeles County, California · Population 9,848,406
0.0%
Mining share of county employment
$87,760
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
On the map 
Loading map…
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
CALMAT Co 6 3 2
Aman Brothers Inc 3 0 0
Holliday Rock Company Inc 3 1 0
UNITED ROCK PRODUCTS CORP 2 1 2
Calmat Company 2 0 0
Connolly-Pacific Company 2 1 0
Curtis Sand & Gravel 2 0 0
Diversified Materials 2 0 0
Granite Construction Company 2 1 0
Paul Hurns Construction 2 0 0
Mines in Los Angeles County95 on register
  1. IRWINDALE PLANT
    Surface metal/non-metal · UNITED ROCK PRODUCTS CORP · MSHA ID 0401763
    Active
  2. Irwindale Aggregates
    Surface metal/non-metal · Martin Marietta Southern California Aggregates,LLC · MSHA ID 0401838
    Active
  3. Durbin Plant
    Surface metal/non-metal · CalMat Co · MSHA ID 0401734
    Active
  4. Littlerock Quarry
    Surface metal/non-metal · Hi-Grade Materials Co · MSHA ID 0404802
    Active
  5. PEBBLY BEACH QUARRY
    Surface metal/non-metal · Connolly-Pacific Company · MSHA ID 0400081
    Active
  6. RELIANCE PLANT
    Surface metal/non-metal · CalMat Co · MSHA ID 0403200
    Active
  7. Azusa Rock
    Surface metal/non-metal · Azusa Rock, LLC · MSHA ID 0404674
    Active
  8. Holliday Rock-Little Rock Plant
    Surface metal/non-metal · Holliday Rock Company Inc · MSHA ID 0404930
    Active
  9. Palmdale
    Surface metal/non-metal · Robertson's · MSHA ID 0404803
    Active
  10. PALMDALE PLANT
    Surface metal/non-metal · CalMat Co · MSHA ID 0402125
    Active
  11. Coast Aggregates Big Rock Creek
    Surface metal/non-metal · Coast Aggregates · MSHA ID 0405908
    Active
  12. Acton Clay Quarries
    Surface metal/non-metal · North Star Minerals Inc · MSHA ID 0405169
    Active
  13. PECK ROAD GRAVEL PIT
    Surface metal/non-metal · S L S & N Inc · MSHA ID 0405309
    Active
  14. Sylmar Site
    Surface metal/non-metal · C & M Topsoil, Inc. · MSHA ID 0405943
    Active
  15. Big Rock Creek Quarry
    Surface metal/non-metal · Granite Construction Company · MSHA ID 0405946
    Active
  16. 75th Street Quarry and Recycling
    Surface metal/non-metal · 75th Street Quarry and Recycling · MSHA ID 0405896
    Active
  17. Sun Valley Plant
    Surface metal/non-metal · CalMat Co · MSHA ID 0401736
    Abandoned
  18. Azusa Quarry
    Surface metal/non-metal · L&G Portable Crushing and Materials · MSHA ID 0401696
    Abandoned
  19. Governor Mine
    Underground metal/non-metal · Herron Construction Inc · MSHA ID 0404671
    Abandoned
  20. Littlerock Plant
    Surface metal/non-metal · Holliday Rock Company Inc · MSHA ID 0401690
    Abandoned
  21. AZUSA
    Facility metal/non-metal · Robertson'S Ready Mix Ltd · MSHA ID 0403821
    Abandoned
  22. TRP-Soledad Canyon Plant
    Surface metal/non-metal · Triangle Rock Products · MSHA ID 0401889
    Abandoned
  23. Upland Plant
    Surface metal/non-metal · Holliday Rock Company · MSHA ID 0402828
    Abandoned
  24. Hansen Dam Plant
    Surface metal/non-metal · Borges Rock Products Inc · MSHA ID 0404730
    Abandoned
  25. Lang Station
    Surface metal/non-metal · Curtis Sand & Gravel · MSHA ID 0401950
    Abandoned
  26. Littlerock
    Surface metal/non-metal · Granite Construction Company · MSHA ID 0404926
    Abandoned
  27. Quarry Division
    Surface metal/non-metal · Three D Service Company · MSHA ID 0404779
    Abandoned
  28. INDUSTRY PLANT
    Facility metal/non-metal · Chemical Lime Company Of Arizona · MSHA ID 0400894
    Abandoned
  29. A-1 Grit Co
    Facility metal/non-metal · A-1 Grit Company · MSHA ID 0404963
    Abandoned
  30. Bay Street Mill
    Facility metal/non-metal · Cyprus Industrial Minerals Company · MSHA ID 0401125
    Abandoned
  31. Chandlers Palos Verdes Sand And Gravel C
    Surface metal/non-metal · Chandler'S Palos Verdes Sand & Gravel Company · MSHA ID 0403110
    Abandoned
  32. Redlands - Wet Plant
    Surface metal/non-metal · Transamerican Soil Service · MSHA ID 0405507
    Abandoned
  33. Soledad Canyon
    Surface metal/non-metal · Curtis Sand & Gravel · MSHA ID 0401746
    Abandoned
  34. Sweetwater Aggregates
    Surface metal/non-metal · Sweetwater Aggregates · MSHA ID 0404741
    Abandoned
  35. Rasmussen Soledad Rock Quarry
    Surface metal/non-metal · Rasmussen R&R Inc. · MSHA ID 0400247
    Abandoned
  36. Del Sur Ridge Quarry
    Surface metal/non-metal · Bouquet Canyon Stone Company Inc · MSHA ID 0402363
    Abandoned
  37. Palmdale Disposable
    Facility metal/non-metal · Frank R Walker Jr · MSHA ID 0405238
    Abandoned
  38. SUNBURST DECORATIVE ROCK INC.
    Facility metal/non-metal · Sunburst Decorative Rock Inc · MSHA ID 0404978
    Abandoned
  39. Big Rock Creek
    Surface metal/non-metal · CalMat Co · MSHA ID 0405778
    Abandoned
  40. SOUTHWEST WEAR PARTS CO., INC.
    Facility metal/non-metal · SOUTHWEST WEAR PARTS CO., INC · MSHA ID 0405921
    Abandoned
  41. Kagel Cyn
    Surface metal/non-metal · O & B Equipment Incorporated · MSHA ID 0405548
    Abandoned
  42. CASPAR MINE
    Surface metal/non-metal · Industrial Mineral Fillers Llc · MSHA ID 0405294
    Abandoned
  43. Calspar Plant
    Facility metal/non-metal · Calspar Division-Steelhead Resources Inc · MSHA ID 0404818
    Abandoned
  44. Empire Quarry
    Surface metal/non-metal · Connolly-Pacific Company · MSHA ID 0404954
    Abandoned
  45. Mid City Granite
    Surface metal/non-metal · Mid City Granite · MSHA ID 0405055
    Abandoned
  46. PORTABLE PLANT A
    Surface metal/non-metal · Diversified Materials · MSHA ID 0404997
    Abandoned
  47. Plant #1
    Surface metal/non-metal · Recycled Base Materials Inc · MSHA ID 0405806
    Abandoned
  48. WHITEMAN AGGREGATES
    Surface metal/non-metal · Whiteman Aggregates · MSHA ID 0405019
    Abandoned
  49. District 9 Plant 1
    Surface metal/non-metal · Griffith Company · MSHA ID 0405588
    Abandoned
  50. Onsite Krushing Co.
    Surface metal/non-metal · Onsite Krushing Co. · MSHA ID 0405772
    Abandoned
  51. C A Rasmussen Inc Crusher Units
    Surface metal/non-metal · C A Rasmussen Inc · MSHA ID 0405722
    Abandoned
  52. #1 PORTABLE
    Surface metal/non-metal · No Frills Trucking · MSHA ID 0405317
    Abandoned
  53. Andrew
    Surface metal/non-metal · Curtis Tungsten · MSHA ID 0405092
    Abandoned
  54. SAN GABRIEL ROCK
    Surface metal/non-metal · San Gabriel Rock Inc · MSHA ID 0404733
    Abandoned
  55. Red Rover Mine
    Underground metal/non-metal · Red Rover Mine 2, LLC · MSHA ID 0405837
    Abandoned
  56. Boulevard Plant
    Surface metal/non-metal · Calmat Company · MSHA ID 0401742
    Abandoned
  57. Hansen Dam Plant
    Surface metal/non-metal · Calmat Company · MSHA ID 0404833
    Abandoned
  58. Palmdale Sand & Gravel
    Surface metal/non-metal · Palmdale Equipment · MSHA ID 0404852
    Abandoned
  59. PORTABLE PLANT C
    Surface metal/non-metal · Aman Brothers Inc · MSHA ID 0404958
    Abandoned
  60. Azusa Quarry
    Surface metal/non-metal · Greenleaf Engineering · MSHA ID 0405930
    Abandoned
  61. Extec 1
    Surface metal/non-metal · Hawk Stone Co · MSHA ID 0405699
    Abandoned
  62. Portable Operation 1
    Surface metal/non-metal · Rasmussen R&R, inc. · MSHA ID 0405867
    Abandoned
  63. PORTABLE PLANT C
    Surface metal/non-metal · Diversified Materials · MSHA ID 0405137
    Abandoned
  64. Portable Plant #2
    Surface metal/non-metal · B & B Materials Inc · MSHA ID 0405363
    Abandoned
  65. Redlands Dry Plant
    Surface metal/non-metal · Trans American Soil Services Inc. · MSHA ID 0405606
    Abandoned
  66. A E Schmidt Company
    Surface metal/non-metal · A E Schmidt Company · MSHA ID 0404763
    Abandoned
  67. Arrow Sand And Gravel Incorporated
    Surface metal/non-metal · Arrow Sand & Gravel Inc · MSHA ID 0404338
    Abandoned
  68. Big Horn
    Surface metal/non-metal · A T G Company · MSHA ID 0404735
    Abandoned
  69. Big Rock Creek Plant
    Surface metal/non-metal · Premier Rock Div Of Ca Portland Cem · MSHA ID 0404042
    Abandoned
  70. C D Houston Sand & Gravel
    Surface metal/non-metal · C D Houston Company · MSHA ID 0405043
    Abandoned
  71. Calmat Plant
    Surface metal/non-metal · Conrock Company · MSHA ID 0401717
    Abandoned
  72. Castaic Brick Plant
    Surface metal/non-metal · Castaic Clay Mfg Co · MSHA ID 0400545
    Abandoned
  73. Chino Plant
    Surface metal/non-metal · Higgins Brick Company · MSHA ID 0402636
    Abandoned
  74. Compton Plant
    Surface metal/non-metal · Atkinson Brick Company · MSHA ID 0400535
    Abandoned
  75. D & S Earthmovers
    Surface metal/non-metal · D & S Earthmovers Equipment Rental · MSHA ID 0404989
    Abandoned
  76. Dam Sand Plant
    Surface metal/non-metal · Paul Hurns Construction · MSHA ID 0404445
    Abandoned
  77. Davidson Brick Company
    Surface metal/non-metal · Davidson Brick Company · MSHA ID 0400550
    Abandoned
  78. Devil'S Gate Dam Plant
    Surface metal/non-metal · Pasadena Aggregates · MSHA ID 0403214
    Abandoned
  79. Enterprise Aggregates Corporation
    Surface metal/non-metal · Enterprise Aggregates Corp · MSHA ID 0404074
    Abandoned
  80. Hansen Dam Aggregates
    Surface metal/non-metal · Hansen Dam Aggregates · MSHA ID 0404719
    Abandoned
  81. Hi-Grade Mine
    Underground metal/non-metal · Hi-Grade Mining Company · MSHA ID 0404557
    Abandoned
  82. Hurns Products
    Surface metal/non-metal · Paul Hurns Construction · MSHA ID 0404500
    Abandoned
  83. Material Yard
    Facility metal/non-metal · H & B Liston Inc · MSHA ID 0404061
    Abandoned
  84. Mission Mineral Plant
    Facility metal/non-metal · Desert Mineral Products Corp · MSHA ID 0403364
    Abandoned
  85. Mobile Sand/Eaton Wash
    Surface metal/non-metal · Mobile Sand Company · MSHA ID 0405011
    Abandoned
  86. Pasadena Rock & Sand
    Surface metal/non-metal · Pasadena Rock & Sand · MSHA ID 0405041
    Abandoned
  87. Pomona Pit
    Surface metal/non-metal · Sand Pebble Suppliers Inc · MSHA ID 0404990
    Abandoned
  88. PORTABLE PLANT A
    Surface metal/non-metal · Aman Brothers Inc · MSHA ID 0405013
    Abandoned
  89. Portable Plant E
    Surface metal/non-metal · Aman Brothers Inc · MSHA ID 0405168
    Abandoned
  90. Precision Products
    Surface metal/non-metal · Precision Lumber Company · MSHA ID 0404467
    Abandoned
  91. Sun Valley Plant
    Surface metal/non-metal · Livingston-Graham · MSHA ID 0401839
    Abandoned
  92. Sunburst Rock
    Surface metal/non-metal · Sunburst Decorative Rock Inc · MSHA ID 0404494
    Abandoned
  93. URP Portable 1
    Surface metal/non-metal · United Rock Products · MSHA ID 0405842
    Abandoned
  94. West Valley Base Materials Pit & Mill
    Surface metal/non-metal · West Valley Base Materials · MSHA ID 0404238
    Abandoned
  95. Western EnvironmentalContracting
    Surface metal/non-metal · CALMAT Co · MSHA ID 0405485
    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.