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MSHA mine register by county

Mines in Natrona County, Wyoming

Natrona County, Wyoming has 52 mines on MSHA's register: 3 active, 9 intermittent, 33 abandoned. 426 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,247 citations.

Every mine MSHA has registered in Natrona 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 Natrona County →

Mines on register
52
Active
3
Fatalities on record
0
Citations issued
1,247
3 underground · 43 surface · 6 facilities 0 coal · 52 metal and non-metal 9 intermittent 33 abandoned 426 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.
Natrona County, Wyoming · Population 79,735
6.5%
Mining share of county employment
$71,247
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
JTL GROUP,INC. 5 0 0
Mobile Concrete, Inc. 5 0 0
71 Construction 3 0 0
Black Hills Bentonite-A Limited Liability Co 3 3 0
Mc Murry Brothers Company Inc 3 0 0
McMurry Ready Mix Co. 3 0 0
Paving Corp 3 0 0
James C Orr Contractor Inc 2 0 0
N-C Paving 2 0 0
Oftedal Construction, Inc. 2 0 0
Mines in Natrona County52 on register
  1. Mills Plant
    Facility metal/non-metal · Black Hills Bentonite · MSHA ID 4800617
    Active
  2. Casper Plant
    Facility metal/non-metal · Black Hills Bentonite-A Limited Liability Co · MSHA ID 4800243
    Active
  3. HT Plant
    Facility metal/non-metal · Black Hills Bentonite · MSHA ID 4801539
    Active
  4. Crusher #2
    Surface metal/non-metal · JTL GROUP, INC. · MSHA ID 4801363
    Temporarily Idled
  5. Tolsa Wyoming Bentonite Plant
    Facility metal/non-metal · Tolsa Wyoming Bentonite · MSHA ID 4801751
    Temporarily Idled
  6. Crusher #1
    Surface metal/non-metal · McMurry Ready Mix Co. · MSHA ID 4801203
    Abandoned
  7. Oftedal Crusher #1
    Surface metal/non-metal · Oftedal Construction Inc · MSHA ID 4801290
    Temporarily Idled
  8. Crusher #7
    Surface metal/non-metal · JTL GROUP,INC. · MSHA ID 4801598
    Intermittent
  9. Casper Pit
    Surface metal/non-metal · JTL Group, Inc. · MSHA ID 4800715
    Temporarily Idled
  10. Cedarapids Screen
    Surface metal/non-metal · Mobile Concrete Inc · MSHA ID 4801522
    Intermittent
  11. Crusher #5
    Surface metal/non-metal · McMurry Ready Mix Co. · MSHA ID 4801590
    Abandoned
  12. Crusher #4
    Surface metal/non-metal · JTL GROUP,INC. · MSHA ID 4801569
    Intermittent
  13. EL JAY
    Surface metal/non-metal · Mobile Concrete Inc · MSHA ID 4801516
    Intermittent
  14. Rental
    Surface metal/non-metal · 71 Construction · MSHA ID 4801628
    Abandoned
  15. Tolsa Mines
    Surface metal/non-metal · Tolsa Wyoming Bentonite Corp. · MSHA ID 4801660
    Temporarily Idled
  16. JCI K200-6203CC
    Surface metal/non-metal · Mobile Concrete, Inc. · MSHA ID 4801736
    Intermittent
  17. PORTABLE SCREENING PLANT
    Surface metal/non-metal · Mobile Concrete Inc · MSHA ID 4800671
    Intermittent
  18. Crusher #1
    Surface metal/non-metal · Emulsified Asphalt Inc Of Wyoming · MSHA ID 4801483
    Abandoned
  19. Advanced Screenplant
    Surface metal/non-metal · 71 Construction · MSHA ID 4801746
    Intermittent
  20. Kolberg Portable Screen
    Surface metal/non-metal · 71 Construction · MSHA ID 4801421
    Abandoned
  21. Fold & Go Screen
    Surface metal/non-metal · Mobile Concrete Inc · MSHA ID 4801644
    Temporarily Idled
  22. Crusher #6
    Surface metal/non-metal · JTL GROUP,INC. · MSHA ID 4801597
    Intermittent
  23. First Water Gravel Pit A
    Surface metal/non-metal · Moses Family Investments · MSHA ID 4801828
    Intermittent
  24. Gas Hills Mill
    Facility metal/non-metal · Umetco Minerals Corp · MSHA ID 4800479
    Abandoned
  25. Screen #3
    Surface metal/non-metal · Brutill Construction, Inc · MSHA ID 4801862
    Temporarily Idled
  26. Recycle
    Surface metal/non-metal · Wyoming Crushing Inc · MSHA ID 4801733
    Abandoned
  27. Bradshaw Pit
    Surface metal/non-metal · N-C Paving · MSHA ID 4801226
    Abandoned
  28. Crusher #8
    Surface metal/non-metal · McMurry Ready Mix Co. · MSHA ID 4801748
    Abandoned
  29. Crusher No 1000
    Surface metal/non-metal · Paving Corp · MSHA ID 4801344
    Abandoned
  30. Crusher No 1001
    Surface metal/non-metal · Paving Corp · MSHA ID 4801240
    Abandoned
  31. East Pit
    Surface metal/non-metal · Paving Corp · MSHA ID 4801300
    Abandoned
  32. Ferris-Haggarty Copper Mine
    Underground metal/non-metal · Dos Lomas Mining Company · MSHA ID 4801332
    Abandoned
  33. Hildebrand Pit
    Surface metal/non-metal · Boatright-Smith · MSHA ID 4800674
    Abandoned
  34. James Orr Crusher
    Surface metal/non-metal · James C Orr Contractor Inc · MSHA ID 4801317
    Abandoned
  35. Lathrop L-3 Pit
    Surface metal/non-metal · Falcon Concrete · MSHA ID 4801140
    Abandoned
  36. Midwest-Thoeming & Wakeman
    Surface metal/non-metal · Benton Clay Company · MSHA ID 4800063
    Abandoned
  37. Miller Pit
    Surface metal/non-metal · Frost Construction Company · MSHA ID 4801298
    Abandoned
  38. Morning Dew
    Surface metal/non-metal · Colorado Quarries Inc · MSHA ID 4801515
    Abandoned
  39. N C Paving Crusher #1
    Surface metal/non-metal · N-C Paving · MSHA ID 4801253
    Abandoned
  40. Nine Mile Lake Project
    Facility metal/non-metal · Rocky Mountain Energy Company · MSHA ID 4801119
    Abandoned
  41. NORDBERG HP 300
    Surface metal/non-metal · Scherer Construction Llc · MSHA ID 4801514
    Abandoned
  42. Oftedal Crusher #2
    Surface metal/non-metal · Oftedal Construction, Inc. · MSHA ID 2402340
    Abandoned
  43. Pat Underground
    Underground metal/non-metal · Federal American Partners · MSHA ID 4801210
    Abandoned
  44. Pursell Pit
    Surface metal/non-metal · James C Orr Contractor Inc · MSHA ID 4801316
    Abandoned
  45. Rim Rock Ranch Pit
    Surface metal/non-metal · Rissler & Mc Murry Company · MSHA ID 4801094
    Abandoned
  46. Sodium
    Surface metal/non-metal · Pratt Sodium · MSHA ID 4800153
    Abandoned
  47. State Land Pit
    Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4801256
    Abandoned
  48. Sun Ray Pit
    Surface metal/non-metal · Sun Ray Energy Corp · MSHA ID 4801165
    Abandoned
  49. TEAPOT
    Underground metal/non-metal · U S Department Of Energy · MSHA ID 4801593
    Abandoned
  50. Unit 500
    Surface metal/non-metal · Mc Murry Brothers Company Inc · MSHA ID 4801386
    Abandoned
  51. Unit 505
    Surface metal/non-metal · Mc Murry Brothers Company Inc · MSHA ID 4801387
    Abandoned
  52. Unit 508
    Surface metal/non-metal · Mc Murry Brothers Company Inc · MSHA ID 4801388
    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 WyomingAll 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.