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MSHA mine register by county

Mines in Jefferson County, Colorado

Jefferson County, Colorado has 77 mines on MSHA's register: 4 active, 4 intermittent, 69 abandoned. 693 accidents have been reported at these mines between 1983 and 2025. Inspectors have issued 1,793 citations.

Every mine MSHA has registered in Jefferson 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 Jefferson County →

Mines on register
77
Active
4
Fatalities on record
0
Citations issued
1,793
5 underground · 65 surface · 6 facilities 0 coal · 77 metal and non-metal 4 intermittent 69 abandoned 693 reported accidents, 1983–2025
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.
Jefferson County, Colorado · Population 579,715
0.8%
Mining share of county employment
$107,800
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
Board Of County Commissioners 7 0 0
Brannan Sand & Gravel Company 4 0 0
Asphalt Paving Company 3 0 0
George W Parfet Estate Inc 3 0 0
Mobile Premix Sand & Gravel Company 3 0 0
Amrize West Central Inc. 2 1 0
BURNCO Colorado LLC 2 1 0
Cotter Corporation 2 0 0
Energy Fuels Nuclear Inc 2 0 0
G C Bennetts & Sons Inc 2 0 0
Mines in Jefferson County77 on register
  1. Amrize Morrison Quarry
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0500864
    Active
  2. Spec Agg Quarry
    Surface metal/non-metal · Martin Marietta Materials · MSHA ID 0500860
    Active
  3. Jeffco Gravel Mine
    Surface metal/non-metal · BURNCO Colorado LLC · MSHA ID 0504756
    Active
  4. CHURCH HARVEY MINE
    Surface metal/non-metal · Cmt Excavating Inc · MSHA ID 0500340
    Active
  5. SCHWARTZWALDER
    Underground metal/non-metal · Cotter Corp · MSHA ID 0500791
    Abandoned
  6. Ralston Quarry
    Surface metal/non-metal · Oldcastle SW Group, Inc · MSHA ID 0503007
    Intermittent
  7. Arcosa Boulder Plant #1604
    Surface metal/non-metal · ARCOSA LWB, LLC · MSHA ID 0504415
    Intermittent
  8. Northern Portable Plant #11
    Surface metal/non-metal · Martin Marietta Materials · MSHA ID 0503984
    Abandoned
  9. SCREEN PLANT
    Surface metal/non-metal · Board Of County Commissioners · MSHA ID 0504264
    Abandoned
  10. POWERSCREEN CHIEFTAIN
    Surface metal/non-metal · BURNCO · MSHA ID 0504185
    Abandoned
  11. Deer Creek Plant
    Surface metal/non-metal · Aggregate Industries WRC Inc · MSHA ID 0502554
    Abandoned
  12. Portable Crusher #1
    Surface metal/non-metal · Asphalt Paving Company · MSHA ID 0504202
    Abandoned
  13. Bluestone Pit
    Surface metal/non-metal · Lafarge West Incorporated · MSHA ID 0502777
    Abandoned
  14. Portable Crusher #2
    Surface metal/non-metal · Asphalt Paving Company · MSHA ID 0504522
    Abandoned
  15. El Jay Cone Crusher
    Surface metal/non-metal · Board Of County Commissioners · MSHA ID 0502836
    Abandoned
  16. Shaffers Crossing Quarry
    Surface metal/non-metal · Elk Creek Sand & Gravel LLC · MSHA ID 0504761
    Abandoned
  17. MCINTYRE PIT
    Surface metal/non-metal · Asphalt Paving Company · MSHA ID 0500932
    Abandoned
  18. WP 3
    Surface metal/non-metal · Oldcastle SW Group, Inc. · MSHA ID 0504549
    Intermittent
  19. Rocky Flats Facility
    Facility metal/non-metal · Rocky Flats Environmental Solutions LLC · MSHA ID 0505139
    Abandoned
  20. Denver Plant 60 Clay Mines
    Surface metal/non-metal · General Shale Brick, Inc. · MSHA ID 0500215
    Intermittent
  21. Crane Pit
    Surface metal/non-metal · Mobile Premix Sand & Gravel Company · MSHA ID 0503205
    Abandoned
  22. Black Forest Mine
    Underground metal/non-metal · Cotter Corporation · MSHA ID 0504734
    Abandoned
  23. 3DW Mines
    Surface metal/non-metal · Acme Brick Company · MSHA ID 0500198
    Abandoned
  24. Bandimere Pit
    Surface metal/non-metal · Western Paving Construction Company · MSHA ID 0502370
    Abandoned
  25. Public Works Quarry #4
    Surface metal/non-metal · Board Of County Commissioners · MSHA ID 0504039
    Abandoned
  26. Public Works Quarry #5
    Surface metal/non-metal · Board Of County Commissioners · MSHA ID 0504014
    Abandoned
  27. Turkey Flats Pit 17
    Surface metal/non-metal · Western Paving Construction Company · MSHA ID 0503969
    Abandoned
  28. Mt Olivet Development
    Surface metal/non-metal · L G Everist Inc · MSHA ID 0504206
    Abandoned
  29. Northwest Industrial Pit
    Surface metal/non-metal · Northwest Industrial/Gravel Inc · MSHA ID 0504135
    Abandoned
  30. PIT #10
    Surface metal/non-metal · Albert Frei & Sons Inc · MSHA ID 0504577
    Abandoned
  31. Public Works Quarry #2
    Surface metal/non-metal · Board Of County Commissioners · MSHA ID 0504053
    Abandoned
  32. Public Works Quarry #6
    Surface metal/non-metal · Board Of County Commissioners · MSHA ID 0504052
    Abandoned
  33. State Clay Mine
    Surface metal/non-metal · Wesley D Conda Inc · MSHA ID 0500191
    Abandoned
  34. ROCKWELL MINE
    Surface metal/non-metal · George W Parfet Estate Inc · MSHA ID 0501843
    Abandoned
  35. Portable Plant # 166
    Surface metal/non-metal · Pioneer Sand Co Inc · MSHA ID 0504976
    Abandoned
  36. Hudick Conifer
    Surface metal/non-metal · Hudick Excavating Inc · MSHA ID 0504979
    Abandoned
  37. Allied Dirt Moving Co Pit & Plant
    Surface metal/non-metal · Allied Dirt Moving Company · MSHA ID 0502030
    Abandoned
  38. Alumet Pilot Plant
    Facility metal/non-metal · Alumet Company · MSHA ID 0502839
    Abandoned
  39. Beryl Ores Mill
    Facility metal/non-metal · Beryl Ores Company · MSHA ID 0503473
    Abandoned
  40. Blunn Dam Project
    Surface metal/non-metal · Eby Construction Company · MSHA ID 0503272
    Abandoned
  41. Bonzo
    Underground metal/non-metal · Energy Fuels Nuclear Inc · MSHA ID 0503257
    Abandoned
  42. Carbon Mountain Pit
    Surface metal/non-metal · Western Paving Construction Company · MSHA ID 0502031
    Abandoned
  43. Chieftain
    Surface metal/non-metal · Robinson Brick Company · MSHA ID 0500217
    Abandoned
  44. Clear Creek Cave
    Underground metal/non-metal · Csm Mining Engineering Department · MSHA ID 0504378
    Abandoned
  45. Coors Washing Plant
    Surface metal/non-metal · Adolph Coors Construction · MSHA ID 0502192
    Abandoned
  46. Dakota
    Surface metal/non-metal · Denver Brick Company · MSHA ID 0504421
    Abandoned
  47. Deer Creek Pit
    Surface metal/non-metal · Peter Kiewit Sons' Company · MSHA ID 0503079
    Abandoned
  48. Denver Fire Clay
    Surface metal/non-metal · G C Bennetts & Sons Inc · MSHA ID 0504049
    Abandoned
  49. Doughty
    Surface metal/non-metal · Lee Doughty · MSHA ID 0500212
    Abandoned
  50. Green Mountain Clay Pit
    Surface metal/non-metal · George W Parfet Estate Inc · MSHA ID 0500203
    Abandoned
  51. Green Valley Pit & Plant
    Surface metal/non-metal · Jefferson County Road & Bridge Department · MSHA ID 0502928
    Abandoned
  52. Holloway Bear Creek Pit And Plant
    Surface metal/non-metal · Holloway Construction Company · MSHA ID 0502762
    Abandoned
  53. Ladwig
    Underground metal/non-metal · Energy Fuels Nuclear Inc · MSHA ID 0501184
    Abandoned
  54. Lakewood Brick Plant
    Facility metal/non-metal · Lakewood Brick & Tile Company · MSHA ID 0500230
    Abandoned
  55. Lariat
    Surface metal/non-metal · Robinson Brick Company · MSHA ID 0500223
    Abandoned
  56. Leyden Pit
    Surface metal/non-metal · G C Bennetts & Sons Inc · MSHA ID 0500201
    Abandoned
  57. Lustre Lode Quarry
    Surface metal/non-metal · Colonna Of Colorado Company · MSHA ID 0500076
    Abandoned
  58. M H S Lab
    Facility metal/non-metal · Golbal Milling · MSHA ID 0504391
    Abandoned
  59. Mauz Mannon Pit
    Surface metal/non-metal · Adolph Coors Company · MSHA ID 0503624
    Abandoned
  60. Mc Intyre Pit
    Surface metal/non-metal · Mobile Premix Concrete Inc · MSHA ID 0501031
    Abandoned
  61. Pallaoro Pit
    Surface metal/non-metal · George Pallaoro · MSHA ID 0502535
    Abandoned
  62. Pioneer Park Pit
    Surface metal/non-metal · G L M Farms Inc · MSHA ID 0503643
    Abandoned
  63. Pit #22
    Surface metal/non-metal · Brannan Sand & Gravel Company · MSHA ID 0503537
    Abandoned
  64. Pit #9
    Surface metal/non-metal · Brannan Sand & Gravel Company · MSHA ID 0503598
    Abandoned
  65. Pit 110
    Surface metal/non-metal · Mobile Premix Sand & Gravel Company · MSHA ID 0502746
    Abandoned
  66. Pit No 12
    Surface metal/non-metal · Brannan Sand & Gravel Company · MSHA ID 0502329
    Abandoned
  67. Pit No 17
    Surface metal/non-metal · Western Paving Construction Company · MSHA ID 0503539
    Abandoned
  68. Pit No 26
    Surface metal/non-metal · Brannan Sand & Gravel Company · MSHA ID 0503003
    Abandoned
  69. Precious Metals Refining Plant
    Facility metal/non-metal · Chemetech Corp · MSHA ID 0503804
    Abandoned
  70. Public Works Quarry #3
    Surface metal/non-metal · Board Of County Commissioners · MSHA ID 0504137
    Abandoned
  71. Rubey Standard Mine
    Surface metal/non-metal · George W Parfet Estate Inc · MSHA ID 0500204
    Abandoned
  72. Snowbird
    Surface metal/non-metal · G L M Farms Inc · MSHA ID 0503660
    Abandoned
  73. Strainland
    Surface metal/non-metal · Denver Brick & Pipe Company · MSHA ID 0500196
    Abandoned
  74. T & W Sand & Gravel
    Surface metal/non-metal · T & W Sand & Gravel Company · MSHA ID 0502331
    Abandoned
  75. Tripoli Red Granite Quarry
    metal/non-metal · Rocky Mountain Quartz Inc · MSHA ID 0504103
    Abandoned
  76. West Lake Pit
    Surface metal/non-metal · Mobile Premix Sand & Gravel Company · MSHA ID 0503009
    Abandoned
  77. Youngfield Pit And Plant
    Surface metal/non-metal · Mobile Premix Sand & Gravel Company · MSHA ID 0501001
    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 ColoradoAll 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.