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MSHA mine register by county

Mines in Fremont County, Colorado

Fremont County, Colorado has 96 mines on MSHA's register: 11 active, 11 intermittent, 74 abandoned. 16 are coal mines and 80 metal or non-metal. 2 miners have died and 850 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 4,045 citations.

Every mine MSHA has registered in Fremont 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 Fremont County →

Mines on register
96
Active
11
Fatalities on record
2
Citations issued
4,045
15 underground · 76 surface · 5 facilities 16 coal · 80 metal and non-metal 11 intermittent 74 abandoned 850 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.
Fremont County, Colorado · Population 49,394
0.6%
Mining share of county employment
$61,027
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
Holcim-WCR, INC 7 3 1
Oldcastle SW Group, Inc 6 0 0
Pioneer Sand Company 4 0 0
Martin Marietta Materials Inc. 3 2 0
Summit Pressed Brick & Tile Company 3 0 0
Super Ex., LLC 3 2 0
Holcim (US) Inc 2 1 1
Calco Inc 2 0 0
Colorado Quarries Inc 2 0 0
Colorado Refractories Corp 2 0 0
Mines in Fremont County96 on register
  1. Amrize Portland Plant
    Facility metal/non-metal · Amrize Cement Inc. · MSHA ID 0500037
    Active
  2. Amrize Canon City Quarry
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0500073
    Active
  3. Red Canyon Quarry
    Surface metal/non-metal · Martin Marietta Materials Inc. · MSHA ID 0504136
    Active
  4. Penrose Ranch Gravel Pit
    Surface metal/non-metal · Martin Marietta Materials Inc. · MSHA ID 0504509
    Active
  5. Amrize Table Mountain Quarry
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0503748
    Active
  6. Langston Concrete Inc.
    Surface metal/non-metal · Langston Concrete Inc. · MSHA ID 0503855
    Active
  7. Yevoli Cobblestone Pit
    Surface metal/non-metal · Yevoli Cobblestone Inc · MSHA ID 0504878
    Active
  8. Kleemann MS15Z-AD
    Surface metal/non-metal · Rocky Mountain Landscape Materials, LLC · MSHA ID 0504968
    Active
  9. Portable Unit Eljay1140
    Surface metal/non-metal · Super Ex., LLC · MSHA ID 0505023
    Active
  10. Amrize Phillips (McCloskey 89822)
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0505111
    Active
  11. Portable Unit Extec
    Surface metal/non-metal · Super Ex, LLC · MSHA ID 0505061
    Active
  12. Southfield Mine
    Underground coal · Energy Fuels Coal Inc · MSHA ID 0503455
    Abandoned
  13. COTTER MILL
    Facility metal/non-metal · Cotter Corp · MSHA ID 0501732
    Abandoned
  14. Parkdale Quarry
    Surface metal/non-metal · Martin Marietta Materials Inc. · MSHA ID 0504635
    Intermittent
  15. Colorado Quarries Inc
    Facility metal/non-metal · Colorado Quarries Inc · MSHA ID 0502172
    Abandoned
  16. Grisenti Farms Gravel Pit
    Surface metal/non-metal · Castle Concrete Aggregates · MSHA ID 0504430
    Abandoned
  17. Twin Pines No 2 Coal Mine
    Underground coal · Twin Pines Investment Ltd Ptnrship/Falcon Energy · MSHA ID 0503793
    Abandoned and Sealed
  18. AIRPORT PIT #1
    Surface metal/non-metal · R E Monks Construction Company · MSHA ID 0503732
    Abandoned
  19. Portable Unit #1
    Surface metal/non-metal · Colorado Quarries Inc · MSHA ID 0504199
    Intermittent
  20. Portable Screen Plant #1
    Surface metal/non-metal · Oldcastle SW Group, Inc · MSHA ID 0504552
    Abandoned
  21. Persolite Products Inc
    Facility metal/non-metal · Persolite Products Inc · MSHA ID 0501899
    Abandoned
  22. Rex Carbon
    Underground coal · Corley Company · MSHA ID 0503889
    Abandoned and Sealed
  23. Wash Plant 2
    Surface metal/non-metal · Oldcastle SW Group, Inc · MSHA ID 0504999
    Intermittent
  24. Portable
    Surface metal/non-metal · Langston Concrete Inc · MSHA ID 0504927
    Intermittent
  25. Portable Crusher #9
    Surface metal/non-metal · Oldcastle SW Group, Inc · MSHA ID 0505163
    Intermittent
  26. Portable Plant # 159
    Surface metal/non-metal · Pioneer Sand Co Inc · MSHA ID 0504786
    Abandoned
  27. 8-MILE GRAVEL PIT-WEST
    Surface metal/non-metal · Rocky Mountain Materials & Asphalt Inc · MSHA ID 0504449
    Abandoned
  28. Amrize Fourmile (J&J Stone Pit #1)
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0504983
    Intermittent
  29. Portable Crusher #6
    Surface metal/non-metal · Oldcastle SW Group, Inc · MSHA ID 0505040
    Intermittent
  30. Portable Screening Plant
    Surface metal/non-metal · Kagan & Son LLC · MSHA ID 0504853
    Intermittent
  31. Amrize RP2 (Rock Pit #2)
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0505141
    Intermittent
  32. Newlin Creek
    Underground coal · Harrison-Peltron · MSHA ID 0503023
    Abandoned and Sealed
  33. Coaldale
    Surface metal/non-metal · Oldcastle SW Group, Inc · MSHA ID 0505125
    Abandoned
  34. Mackenzie Pit
    Surface metal/non-metal · Oldcastle SW Group, Inc · MSHA ID 0500977
    Abandoned
  35. Byzantine Quarry
    Surface metal/non-metal · Larson Colorado LLC · MSHA ID 0504845
    Abandoned
  36. Portable Screener #1
    Surface metal/non-metal · Fremont County Department of Transportation · MSHA ID 0504876
    Intermittent
  37. Salt Canyon
    Surface metal/non-metal · GCC Rio Grande Inc · MSHA ID 0504974
    Abandoned
  38. Brown's Pit
    Surface metal/non-metal · Custom Gravel Products Inc. · MSHA ID 0504748
    Abandoned
  39. FLORENCE GRAVEL PIT
    Surface metal/non-metal · Pioneer Sand Company · MSHA ID 0504482
    Abandoned
  40. Gec Strip And Auger
    Surface coal · G E C Minerals Inc · MSHA ID 0500290
    Abandoned and Sealed
  41. Taylor Gulch West
    Underground metal/non-metal · Calco Inc · MSHA ID 0504472
    Abandoned
  42. U S Soil M & M Plant
    Surface metal/non-metal · U S Soil M & M · MSHA ID 0504388
    Abandoned
  43. Iron Mtn Rd Gravel Pit
    Surface metal/non-metal · Rocky Mountain Excavating LLC · MSHA ID 0504847
    Abandoned
  44. SUMMIT CLAY PITS - L.C.I. Inc.
    Surface metal/non-metal · L.C.I. · MSHA ID 0504710
    Abandoned
  45. Coaldale Gypsum Quarry
    Surface metal/non-metal · Holcim (US) Inc · MSHA ID 0500425
    Abandoned
  46. Portable Unit Diamond
    Surface metal/non-metal · Super Ex, LLC · MSHA ID 0505060
    Abandoned
  47. Amrize Fremont Quarry
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0504708
    Intermittent
  48. 8-Mile Clay Mine
    Surface metal/non-metal · Summit Pressed Brick & Tile Company · MSHA ID 0503925
    Abandoned
  49. Airport Pit #2
    Surface metal/non-metal · R E Monks Construction Company · MSHA ID 0503927
    Abandoned
  50. Apex Trust Mine
    Underground metal/non-metal · Ideal Energy Company · MSHA ID 0503457
    Abandoned
  51. Azco Pit
    Surface metal/non-metal · Azco Construction Inc. · MSHA ID 0504797
    Abandoned
  52. Beaver Creek Red
    Surface metal/non-metal · Summit Pressed Brick & Tile Company · MSHA ID 0500234
    Abandoned
  53. Box Canyon #1
    Underground metal/non-metal · Calco Inc · MSHA ID 0504511
    Abandoned
  54. Can-Usa Quarries
    Surface metal/non-metal · Can-Usa Construction Inc · MSHA ID 0504002
    Abandoned
  55. Canon Black Diamond
    Underground coal · Canon Black Diamond Coal Company · MSHA ID 0500244
    Abandoned
  56. Canon City Concrete Division
    Surface metal/non-metal · Valco Inc · MSHA ID 0500956
    Abandoned
  57. Canon Dolomite
    Surface metal/non-metal · C F & I Steel Corp · MSHA ID 0500013
    Abandoned
  58. Canon Zenith No 2 Mine
    Underground coal · Nick Moschetti Coal Company · MSHA ID 0500251
    Abandoned
  59. Cedar Canon Strip & Auger
    Surface coal · Cedar Canon Coal Company · MSHA ID 0502775
    Abandoned
  60. Cedar Canon Ug
    Underground coal · Cedar Canon Coal Company · MSHA ID 0500247
    Abandoned
  61. Cherokee Pit
    Surface metal/non-metal · Colorado Refractories Corp · MSHA ID 0502556
    Abandoned
  62. Colorado Refractories Brick Plant C
    Surface metal/non-metal · Colorado Refractories Corp · MSHA ID 0502578
    Abandoned
  63. Cotopaxi Lode Mine Venture Ltd
    Surface metal/non-metal · Cotopaxi Lode Mine Venture Ltd · MSHA ID 0502162
    Abandoned
  64. Coyote Ridge Quarry
    Surface metal/non-metal · Rocky Mountain Materials & Asphalt Inc · MSHA ID 0504688
    Abandoned
  65. Dozier Ave Pit
    Surface metal/non-metal · Sabatino Excavating Inc · MSHA ID 0503527
    Abandoned
  66. Eight Mile Creek Gravel
    Surface metal/non-metal · Wilson Excavation · MSHA ID 0504237
    Abandoned
  67. Eight Mile Quarry
    Surface metal/non-metal · Holcim-WCR, INC · MSHA ID 0505068
    Abandoned
  68. English Quarry
    Surface metal/non-metal · Lockhart & Sons · MSHA ID 0500049
    Abandoned
  69. Florence Gravel Pit
    Surface metal/non-metal · Pioneer Sand Company · MSHA ID 0504446
    Abandoned
  70. George Wolfe Pit
    Surface metal/non-metal · George H Wolfe · MSHA ID 0503679
    Abandoned
  71. Golden Quality No 5
    Underground coal · Golden Quality Coal Co · MSHA ID 0500249
    Abandoned
  72. Hastings Strip Mine
    Surface coal · Hastings Construction Company · MSHA ID 0503116
    Abandoned and Sealed
  73. J&J STONE PIT #1
    Surface metal/non-metal · Double S Enterprises · MSHA ID 0504632
    Abandoned
  74. Last Chance No 2
    Underground coal · Last Chance Coal Company · MSHA ID 0500250
    Abandoned
  75. Lyons Pit
    Surface metal/non-metal · Mountain Valley Excavating LLC · MSHA ID 0505155
    Abandoned
  76. Mica Lode
    Surface metal/non-metal · Colonna Of Colorado Company · MSHA ID 0500052
    Abandoned
  77. Murco Mill
    Facility metal/non-metal · Murco Wall Products · MSHA ID 0504148
    Abandoned
  78. New Annex #2 Strip
    Surface coal · Nickie Rocchio Operator · MSHA ID 0500241
    Abandoned
  79. Northfield
    Underground coal · Northfield Partners LLC · MSHA ID 0504918
    Abandoned
  80. Portable Crusher
    Surface metal/non-metal · Pioneer Sand Company · MSHA ID 0504161
    Abandoned
  81. Portable Crusher 2
    Surface metal/non-metal · Kagan & Son LLC · MSHA ID 0504973
    Abandoned
  82. Portable Crusher And Screening Plant
    Surface metal/non-metal · Ed Loloff Construction Inc · MSHA ID 0503284
    Abandoned
  83. Portable Plant #1
    Surface metal/non-metal · V & V Construction Company · MSHA ID 0504425
    Abandoned
  84. Red Devil Quarry
    Surface metal/non-metal · Nutritional Research & Development · MSHA ID 0501853
    Abandoned
  85. Rocky Mountain Minerals
    Surface metal/non-metal · Rocky Mountain Minerals · MSHA ID 0503769
    Abandoned
  86. SPOTTED BURRO PIT
    Surface metal/non-metal · Trans Colorado Concrete · MSHA ID 0504629
    Abandoned
  87. Stocks White
    Surface metal/non-metal · Summit Pressed Brick & Tile Company · MSHA ID 0503924
    Abandoned
  88. Table Mountain Quarries Incorporated
    Surface metal/non-metal · Table Mountain Quarries Inc · MSHA ID 0503806
    Abandoned
  89. TALLAHASSEE PIT
    Surface metal/non-metal · Fred Lowry & Jerald A Seifert · MSHA ID 0504636
    Abandoned
  90. Tezak #2 Pit
    Surface metal/non-metal · Tezak Stone & Aggregate Supply Inc · MSHA ID 0505013
    Abandoned
  91. Thunder Mountain
    Surface metal/non-metal · Lionelle Group · MSHA ID 0500429
    Abandoned
  92. Twin Pines
    Underground coal · Twin Pines Coal Company · MSHA ID 0500252
    Abandoned and Sealed
  93. V & V Construction Company
    Surface metal/non-metal · V & V Construction Company · MSHA ID 0504054
    Abandoned
  94. Vento
    Underground coal · Vento Company · MSHA ID 0500253
    Abandoned
  95. Yellow King
    Surface metal/non-metal · Red Mountain Clay · MSHA ID 0502598
    Abandoned
  96. Zinghein Quarry
    Surface metal/non-metal · Texas Creek Native Stone Inc · MSHA ID 0500863
    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.