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MSHA mine register by county

Mines in Larimer County, Colorado

Larimer County, Colorado has 134 mines on MSHA's register: 9 active, 12 intermittent, 113 abandoned. 4 miners have died and 936 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 2,625 citations.

Every mine MSHA has registered in Larimer 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 Larimer County →

Mines on register
134
Active
9
Fatalities on record
4
Citations issued
2,625
2 underground · 127 surface · 5 facilities 0 coal · 134 metal and non-metal 12 intermittent 113 abandoned 936 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.
Larimer County, Colorado · Population 363,561
0.6%
Mining share of county employment
$91,364
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
Pete Lien and Sons, Inc. 7 1 0
Coulson Excavating Company, Inc. 6 0 0
Connell Resources, Inc. 5 0 0
Flatiron Materials Company 5 0 0
Lafarge West Incorporated 5 0 0
Martin Marietta Materials 5 0 0
Sterling Sand & Gravel Company 5 0 0
Arkins Park Stone Corporation 4 1 0
Sterling Sand & Gravel Company 4 0 0
Don Kehn Construction, Inc. 3 0 0
Mines in Larimer County134 on register
  1. TRUPP LOVELAND
    Surface metal/non-metal · Arkins Park Stone · MSHA ID 0502666
    Active
  2. Owl Canyon Quarry & Mill
    Surface metal/non-metal · Pete Lien and Sons, Inc. · MSHA ID 0503222
    Active
  3. LOVELAND READY-MIX CONCRETE INC SAND AND
    Surface metal/non-metal · Loveland Ready Mix Concrete Inc · MSHA ID 0501004
    Active
  4. PORTABLE #1 Fort Collins
    Surface metal/non-metal · Simon Contractors · MSHA ID 0504083
    Active
  5. Stone Wholesale Brownstone Quarry
    Surface metal/non-metal · Stone Wholesale, Inc. · MSHA ID 0504910
    Active
  6. MASONVILLE QUARRY
    Surface metal/non-metal · Masonville Stone Company · MSHA ID 0504013
    Active
  7. Sprague Stone LLC
    Surface metal/non-metal · Sprague Stone LLC · MSHA ID 0505077
    Active
  8. Meadow Hollow Quarry
    Surface metal/non-metal · Colorado Quarry 1, LLC · MSHA ID 0505153
    Active
  9. Knox Pit
    Surface metal/non-metal · Loveland Ready Mix Concrete, Inc · MSHA ID 0505169
    Active
  10. FT COLLINS PLANT
    Facility metal/non-metal · Holcim Inc · MSHA ID 0500039
    Abandoned
  11. Glacier Rock Pit
    Surface metal/non-metal · Glacier Rock Company · MSHA ID 0504634
    Intermittent
  12. Mobile
    Surface metal/non-metal · Rubble Inc · MSHA ID 0504470
    Abandoned
  13. Fort Collins Plant
    Surface metal/non-metal · Aggregate Industries WCR, Inc. · MSHA ID 0504733
    Abandoned
  14. Hotchkiss Mine
    Surface metal/non-metal · BB Stoneworks · MSHA ID 0504666
    Intermittent
  15. LAPORTE HYDRATE LIME PLANT
    Surface metal/non-metal · Pete Lien & Sons Inc · MSHA ID 0503964
    Abandoned
  16. Rocky Road Quarry
    Surface metal/non-metal · Colorado Flagstone Inc · MSHA ID 0503995
    Intermittent
  17. Portable Crusher
    Surface metal/non-metal · Larimer County Road & Bridge Department · MSHA ID 0504124
    Intermittent
  18. Northern Portable Plant #12
    Surface metal/non-metal · Martin Marietta Materials · MSHA ID 0504526
    Abandoned
  19. Wyoming Hereford Ranch Pit
    Surface metal/non-metal · Don Kehn Construction Inc · MSHA ID 0503839
    Abandoned
  20. PORTABLE CRUSHER #1
    Surface metal/non-metal · Dillon Construction · MSHA ID 0504617
    Abandoned
  21. KAUFFMAN PIT
    Surface metal/non-metal · Jake Kauffman & Son Inc · MSHA ID 0500996
    Abandoned
  22. Coulson Portable
    Surface metal/non-metal · Coulson Excavating Company, Inc. · MSHA ID 0503522
    Intermittent
  23. Barnard Quarry
    Surface metal/non-metal · Blue Mt Stone · MSHA ID 0504196
    Intermittent
  24. Northern Portable Plant #4
    Surface metal/non-metal · Martin Marietta Materials · MSHA ID 0504320
    Abandoned
  25. Carter Lake Enterprises Inc
    Surface metal/non-metal · Carter Lake Enterprises Inc · MSHA ID 0504123
    Abandoned
  26. NORTHERN PORTABLE PLANT #3
    Surface metal/non-metal · Martin Marietta Materials · MSHA ID 0504361
    Abandoned
  27. Northern Portable Plant #17
    Surface metal/non-metal · Martin Marietta Materials · MSHA ID 0504735
    Abandoned
  28. COLORADO ROSE RED QUARRY
    Underground metal/non-metal · Colorado Rose Red Inc. · MSHA ID 0500070
    Abandoned
  29. NORTHERN PORTABLE PLANT #2
    Surface metal/non-metal · Lafarge West Incorporated · MSHA ID 0504360
    Abandoned
  30. R&R GRAVEL
    Surface metal/non-metal · R & R Gravel Inc · MSHA ID 0503811
    Abandoned
  31. Sheep Draw Quarry
    Surface metal/non-metal · Colorado Lien Company · MSHA ID 0503167
    Abandoned
  32. PORTABLE WASH PLANT #1
    Surface metal/non-metal · Connell Resources, Inc. · MSHA ID 0503795
    Intermittent
  33. Portable Crusher #3
    Surface metal/non-metal · Connell Resources Inc · MSHA ID 0504762
    Abandoned
  34. WEAVER QUARRY
    Surface metal/non-metal · Loukonen Brothers Stone · MSHA ID 0500079
    Intermittent
  35. NORTHERN PORTABLE PLANT #7
    Surface metal/non-metal · Lafarge West Incorporated · MSHA ID 0504364
    Abandoned
  36. KELSEY LAKE
    Surface metal/non-metal · Great Western Diamond Company · MSHA ID 0504494
    Abandoned
  37. Berthoud Pink
    Surface metal/non-metal · Arkins Park Stone Corp · MSHA ID 0500005
    Abandoned
  38. Coulson Portable Wash Plant
    Surface metal/non-metal · Coulson Excavating Company, Inc. · MSHA ID 0504800
    Intermittent
  39. Heitf Pit
    Surface metal/non-metal · Mill Iron Mining · MSHA ID 0505025
    Intermittent
  40. Garita Stone Buzzards Inc.
    Surface metal/non-metal · Garita Stone Buzzards Inc. · MSHA ID 0504737
    Abandoned
  41. Portable Plant 5
    Surface metal/non-metal · Plains Aggregate Company · MSHA ID 0504060
    Abandoned
  42. Northern Portable Plant #5
    Surface metal/non-metal · Lafarge West Incorporated · MSHA ID 0504330
    Abandoned
  43. WINDY POINT
    Surface metal/non-metal · T Bone Stone Inc · MSHA ID 0504675
    Abandoned
  44. Monroe Pit
    Surface metal/non-metal · Monroe Excavating Incorporated · MSHA ID 0504768
    Abandoned
  45. MJR
    Surface metal/non-metal · Mjr Lc · MSHA ID 0504669
    Abandoned
  46. Amrize Ingleside Quarry
    Surface metal/non-metal · Amrize West Central Inc. · MSHA ID 0505140
    Intermittent
  47. Portable Crusher #4
    Surface metal/non-metal · Connell Resources Inc · MSHA ID 0504882
    Abandoned
  48. Meadow Hollow
    Surface metal/non-metal · Molina Red Stone · MSHA ID 0504971
    Abandoned
  49. Northern Portable Plant #13
    Surface metal/non-metal · Lafarge West Incorporated · MSHA ID 0504556
    Abandoned
  50. Northern Portable Plant #9
    Surface metal/non-metal · Lafarge West Incorporated · MSHA ID 0504515
    Abandoned
  51. Lyons Red
    Surface metal/non-metal · Arkins Park Stone · MSHA ID 0500448
    Abandoned
  52. Loudwire Quarry
    Surface metal/non-metal · Loudwire Diesel LLC · MSHA ID 0505154
    Intermittent
  53. Cedar Valley Gravel
    Surface metal/non-metal · Cedar Valley Ltd · MSHA ID 0503812
    Abandoned
  54. East Harmony Rock
    Surface metal/non-metal · East Harmony Rock Inc · MSHA ID 0503840
    Abandoned
  55. Ft Collins South
    Surface metal/non-metal · Flatiron Paving Company · MSHA ID 0503256
    Abandoned
  56. Jay Hawker
    Surface metal/non-metal · Larimer County · MSHA ID 0503024
    Abandoned
  57. M P M Fort Collins Timberline Pit
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0503541
    Abandoned
  58. MUNROE QUARRY
    Surface metal/non-metal · Colorado Lien Company · MSHA ID 0503114
    Abandoned
  59. WEAVER QUARRY
    Surface metal/non-metal · Colorado Lien Company · MSHA ID 0504393
    Abandoned
  60. Meadow Hollow Quarry
    Surface metal/non-metal · Carter Lake Enterprises · MSHA ID 0504935
    Abandoned
  61. NORTHERN PORTABLE PLANT #4
    Surface metal/non-metal · Martin Marietta Materials · MSHA ID 4801565
    Abandoned
  62. ALLIED PORTABLE CRUSHING
    Surface metal/non-metal · Allied Portable Crushing/Recycling · MSHA ID 0504703
    Abandoned
  63. Arkins Quarry
    Surface metal/non-metal · Holliday Mining LLC · MSHA ID 0505065
    Abandoned
  64. Quarry 1
    Surface metal/non-metal · Rock & Company · MSHA ID 0505005
    Abandoned
  65. Sprague - Buff Quarry
    Surface metal/non-metal · Arkins Park Stone Corporation · MSHA ID 0504725
    Abandoned
  66. 6001 Pecos
    Surface metal/non-metal · Siegrist Construction Company · MSHA ID 0502818
    Abandoned
  67. Barker Sand & Gravel Pit
    Surface metal/non-metal · Barker Sand & Gravel · MSHA ID 0501037
    Abandoned
  68. Beech Hill Quarry 1 & 2
    Surface metal/non-metal · Svilar Stone · MSHA ID 0504377
    Abandoned
  69. Bixby Pit
    Surface metal/non-metal · Bixby Excavating · MSHA ID 0504379
    Abandoned
  70. Brose Pit
    Surface metal/non-metal · Flatiron Materials Company · MSHA ID 0503471
    Abandoned
  71. BURDICK QUARRY
    Surface metal/non-metal · Rocky Top Stone · MSHA ID 0504259
    Abandoned
  72. Buster'S No 2
    Surface metal/non-metal · Superior Stone Company · MSHA ID 0504223
    Abandoned
  73. Coulson Pit
    Surface metal/non-metal · Coulson Excavating Company Inc · MSHA ID 0501998
    Abandoned
  74. Currie Pit
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0501884
    Abandoned
  75. Customer Technical Service Lab
    Facility metal/non-metal · Holcim (US), Inc · MSHA ID 0504507
    Abandoned
  76. DILTS QUARRY
    Surface metal/non-metal · Holcim (US), Inc · MSHA ID 0504573
    Abandoned
  77. Dowdy Mine
    Surface metal/non-metal · Pine Creek Mining · MSHA ID 0503578
    Abandoned
  78. East Rigden Pit
    Surface metal/non-metal · Flatiron Materials Company · MSHA ID 0503427
    Abandoned
  79. Estes Pit & Plant
    Surface metal/non-metal · Sterling Contracting Companies · MSHA ID 0503014
    Abandoned
  80. F H Norberg Co Rex Quarry
    Surface metal/non-metal · Colorado Lien Company · MSHA ID 0500057
    Abandoned
  81. Fort Collins Plant
    Facility metal/non-metal · Cominco American Inc · MSHA ID 0503735
    Abandoned
  82. Ft Collins N
    Surface metal/non-metal · Flatiron Materials Company · MSHA ID 0500973
    Abandoned
  83. Gavell Excavating
    Surface metal/non-metal · Gavell Excavating · MSHA ID 0503857
    Abandoned
  84. Goodwin Quarry
    Facility metal/non-metal · Ideal Basic Industries-Cement Division · MSHA ID 0500427
    Abandoned
  85. Haags Sand & Gravel
    Surface metal/non-metal · Haag Sand & Gravel Inc · MSHA ID 0500989
    Abandoned
  86. Harmony Pit
    Surface metal/non-metal · Don Kehn Construction Inc · MSHA ID 0501917
    Abandoned
  87. Ingleside Quarry
    Surface metal/non-metal · Ingleside Quarry · MSHA ID 0503633
    Abandoned
  88. Jackson Stone Quarry
    Surface metal/non-metal · Jackson Stone Company · MSHA ID 0503994
    Abandoned
  89. Jim'S Wrecker Service Incorporated
    Surface metal/non-metal · Jim'S Wrecker Service Inc · MSHA ID 0504188
    Abandoned
  90. Johnson Pit
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0501038
    Abandoned
  91. Kirtright Pit
    Surface metal/non-metal · Coulson Excavating Company Inc · MSHA ID 0504210
    Abandoned
  92. LARIMER QUARRY
    Surface metal/non-metal · Divide Constructors Inc · MSHA ID 0502813
    Abandoned
  93. Masonville Industries Incorporated
    Surface metal/non-metal · Masonville Industries Inc · MSHA ID 0504224
    Abandoned
  94. Nauta Ii
    Surface metal/non-metal · Nauta · MSHA ID 0503145
    Abandoned
  95. Ohline Quarries
    Surface metal/non-metal · Doc'S Stone Company · MSHA ID 0504192
    Abandoned
  96. Ohline Quarry Pablo Vasquez Lease
    Surface metal/non-metal · Pablo Vasquez · MSHA ID 0500861
    Abandoned
  97. Osborn Pit
    Surface metal/non-metal · Loveland Excavating Company · MSHA ID 0503297
    Abandoned
  98. Owl Canyon Quarry (Section 16)
    Surface metal/non-metal · Divide Constructors Inc · MSHA ID 0503283
    Abandoned
  99. Patterson Pit
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0503214
    Abandoned
  100. Pink Misty Minerals and Gems
    Surface metal/non-metal · Pink Misty Minerals and Gems LLC · MSHA ID 4801876
    Abandoned
  101. Portable Crusher #1
    Surface metal/non-metal · Ward Construction · MSHA ID 0505071
    Abandoned
  102. Portable Plant #3 Screen
    Surface metal/non-metal · Connell Resources Inc · MSHA ID 0504370
    Abandoned
  103. Portable Plant #4
    Surface metal/non-metal · Sterling Companies · MSHA ID 0504362
    Abandoned
  104. Portable Plant #5
    Surface metal/non-metal · Sterling Companies · MSHA ID 0504363
    Abandoned
  105. Portable Plant #9
    Surface metal/non-metal · Western-Mobile Northern Inc · MSHA ID 0504366
    Abandoned
  106. Portable Plant 2
    Surface metal/non-metal · Plains Aggregate Company · MSHA ID 0504326
    Abandoned
  107. Probasco Pit
    Surface metal/non-metal · Coulson Excavating Company Inc · MSHA ID 0503277
    Abandoned
  108. Prospect Pit And Plant
    Surface metal/non-metal · Plains Aggregate Company · MSHA ID 0502339
    Abandoned
  109. Pulliam Gravel Pit
    Surface metal/non-metal · Coulson Excavating Company Inc · MSHA ID 0503156
    Abandoned
  110. R & R Stone
    Surface metal/non-metal · R & R Stone · MSHA ID 0504243
    Abandoned
  111. Red Feather Pit
    Surface metal/non-metal · Barker Sand & Gravel · MSHA ID 0503466
    Abandoned
  112. Red Quarry
    Surface metal/non-metal · United Stoneworks LLC · MSHA ID 0504988
    Abandoned
  113. Rented Chieftan Powerscreen
    Surface metal/non-metal · Connell Resources, Inc. · MSHA ID 0504982
    Abandoned
  114. ROBERTS QUARRY
    Surface metal/non-metal · Colorado Lien Company · MSHA ID 0504510
    Abandoned
  115. Russell Gravel Pit
    Surface metal/non-metal · Doyle Russell · MSHA ID 0504225
    Abandoned
  116. Schureman
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0501952
    Abandoned
  117. Screener
    Surface metal/non-metal · Larimer County Road & Bridge Department · MSHA ID 0502877
    Abandoned
  118. Seaworth Pit
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0501951
    Abandoned
  119. Simpson
    Surface metal/non-metal · Flatiron Materials Company · MSHA ID 0503258
    Abandoned
  120. SLAB CANYON QUARRY
    Surface metal/non-metal · Holcim (US), Inc · MSHA ID 0500345
    Abandoned
  121. Sloan Diamond Project
    Underground metal/non-metal · L E L Construction · MSHA ID 0503783
    Abandoned
  122. SLOAN MILL
    Facility metal/non-metal · Barker Construction Company Inc · MSHA ID 0504542
    Abandoned
  123. St Louis
    Surface metal/non-metal · Flatiron Materials Company · MSHA ID 0503259
    Abandoned
  124. Swartz
    Surface metal/non-metal · Flatiron Paving Company · MSHA ID 0501997
    Abandoned
  125. Taft Hill Pit
    Surface metal/non-metal · Loveland Excavating Company · MSHA ID 0503823
    Abandoned
  126. Three Bell
    Surface metal/non-metal · Sterling Paving Company · MSHA ID 0503960
    Abandoned
  127. Timnath
    Surface metal/non-metal · Flatiron Paving Company · MSHA ID 0503255
    Abandoned
  128. Timnath Pit-Wash Plant
    Surface metal/non-metal · Don Kehn Construction, Inc. · MSHA ID 0504795
    Abandoned
  129. Tomahawk Mine
    Surface metal/non-metal · Pine Creek Mining · MSHA ID 0503577
    Abandoned
  130. Treiber
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0502629
    Abandoned
  131. W R E N
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0503213
    Abandoned
  132. Weitzel
    Surface metal/non-metal · Sterling Sand & Gravel Company · MSHA ID 0504226
    Abandoned
  133. Whitman Quarry
    Surface metal/non-metal · Ed Loloff Construction Inc · MSHA ID 0503129
    Abandoned
  134. Woodhams Quarry
    Surface metal/non-metal · Quad Honstein Joint Venture · MSHA ID 0502548
    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.