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MSHA mine register by county

Mines in Big Horn County, Wyoming

Big Horn County, Wyoming has 49 mines on MSHA's register: 10 active, 5 intermittent, 30 abandoned. 796 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 1,495 citations.

Every mine MSHA has registered in Big Horn 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 Big Horn County →

Mines on register
49
Active
10
Fatalities on record
0
Citations issued
1,495
2 underground · 42 surface · 5 facilities 0 coal · 49 metal and non-metal 5 intermittent 30 abandoned 796 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.
Big Horn County, Wyoming · Population 11,737
6.4%
Mining share of county employment
$60,547
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
Wyo-Ben, Inc 9 5 0
Dresser Minerals Division 6 0 0
American Colloid Company Minerals Group 3 2 0
Nicholls & Lewis Concrete 3 0 0
Bentonite Performance Minerals LLC 2 2 0
Big Horn County Road & Bridge 2 0 0
BIG HORN REDI MIX, INC. 2 0 0
Frost Rock Products Company 2 0 0
Georgia Pacific Corp 2 0 0
Nicholls & Lewis Inc 2 0 0
Mines in Big Horn County49 on register
  1. Lovell Mill
    Facility metal/non-metal · American Colloid Company · MSHA ID 4800057
    Active
  2. Stucco Mill
    Facility metal/non-metal · Wyo-Ben, Inc · MSHA ID 4800611
    Active
  3. Magnet Cove Mill
    Facility metal/non-metal · Wyo-Ben, Inc · MSHA ID 4800602
    Active
  4. Magnet Cove Mine
    Surface metal/non-metal · Wyo-Ben, Inc · MSHA ID 4800603
    Active
  5. BPM Lovell Mill
    Facility metal/non-metal · Bentonite Performance Minerals LLC · MSHA ID 4801405
    Active
  6. Sage Creek Mill
    Facility metal/non-metal · Wyo-Ben, Inc · MSHA ID 4800612
    Active
  7. G-P Gypsum Quarries
    Surface metal/non-metal · Georgia-Pacific Gypsum LLC · MSHA ID 4801019
    Active
  8. BPM Lovell Mine
    Surface metal/non-metal · Bentonite Performance Minerals LLC · MSHA ID 4801016
    Active
  9. Big Horn Basin Mines
    Surface metal/non-metal · Wyo-Ben, Inc · MSHA ID 4800974
    Active
  10. Yellowtail Mine
    Surface metal/non-metal · American Colloid Company · MSHA ID 4800607
    Active
  11. Portable #1
    Surface metal/non-metal · Mountain Construction Company · MSHA ID 4801636
    Temporarily Idled
  12. Crusher #1
    Surface metal/non-metal · Frost Rock Products Company · MSHA ID 4801681
    Intermittent
  13. Greybull Field Project
    Underground metal/non-metal · New Era Petroleum, Inc. · MSHA ID 4801679
    Abandoned
  14. Crusher No 1
    Surface metal/non-metal · Big Horn County Road & Bridge · MSHA ID 4801481
    Abandoned
  15. Crusher #2
    Surface metal/non-metal · Frost Rock Products Company · MSHA ID 4801302
    Temporarily Idled
  16. Capwood Properties
    Surface metal/non-metal · River Rock, LLC · MSHA ID 4801825
    Intermittent
  17. Bear Creek
    Surface metal/non-metal · Good Bentonite Company, LLC · MSHA ID 4801780
    Abandoned
  18. BCS - M.K.
    Surface metal/non-metal · Kenneth E Tanner · MSHA ID 4801498
    Abandoned
  19. Greybull Wash Plant
    Surface metal/non-metal · Big Horn Redi Mix · MSHA ID 4801642
    Abandoned
  20. Portable Crusher
    Surface metal/non-metal · Nicholls & Lewis Inc · MSHA ID 4800290
    Abandoned
  21. Crusher No 2
    Surface metal/non-metal · Big Horn County Road & Bridge · MSHA ID 4801648
    Abandoned
  22. 3J Crushing Plant
    Surface metal/non-metal · 3J Trucking LLC · MSHA ID 4801869
    Intermittent
  23. Bear Creek Good
    Surface metal/non-metal · L. D. Anderson, Inc. · MSHA ID 4801772
    Abandoned
  24. GK Gravel Pit
    Surface metal/non-metal · GK Construction Inc. · MSHA ID 4801788
    Intermittent
  25. MOLNAR PIT
    Surface metal/non-metal · BIG HORN REDI MIX, INC. · MSHA ID 4801892
    Temporarily Idled
  26. RM100
    Surface metal/non-metal · Summit Excavation & Grading, LLC · MSHA ID 4801839
    Abandoned
  27. Bairco Mobile Crusher
    Surface metal/non-metal · Bairco Construction Inc. · MSHA ID 4801882
    Intermittent
  28. Barnett Mine
    Surface metal/non-metal · Dresser Minerals Division · MSHA ID 4800804
    Abandoned
  29. Bear Creek Area
    Surface metal/non-metal · Dresser Minerals Division · MSHA ID 4800605
    Abandoned
  30. Brody Pit
    Surface metal/non-metal · Big Horn Ranch Holdings, LLC · MSHA ID 4801813
    Abandoned
  31. Clark Pit
    Surface metal/non-metal · Nicholls & Lewis Concrete · MSHA ID 4801209
    Abandoned
  32. Crystal Mine
    Surface metal/non-metal · American Colloid Company Minerals Group · MSHA ID 4800606
    Abandoned
  33. East Stucco
    Surface metal/non-metal · Wyo-Ben Inc · MSHA ID 4800882
    Abandoned
  34. Frost Crusher #1
    Surface metal/non-metal · Frost Construction Company · MSHA ID 4801434
    Abandoned
  35. Gypsum Quarry No 7
    Surface metal/non-metal · Georgia Pacific Corp · MSHA ID 4801154
    Abandoned
  36. Highland Excavation Pit
    Surface metal/non-metal · Highland Excavation & Construction, Inc. · MSHA ID 4801874
    Temporarily Idled
  37. Himes Gypsum Mill
    Surface metal/non-metal · Georgia Pacific Corp · MSHA ID 4800633
    Abandoned
  38. Lisbon Mine
    Underground metal/non-metal · Bob-Lea Industries Inc · MSHA ID 4801356
    Abandoned
  39. Little Sheep Mountain Limestone Quarry
    Surface metal/non-metal · Nicholls & Lewis Inc · MSHA ID 4801499
    Abandoned
  40. Lovell Clay Products No 2 Shale Pit
    Surface metal/non-metal · Lovell Clay Products Company · MSHA ID 4800071
    Abandoned
  41. Mineral Division
    Surface metal/non-metal · Dresser Minerals Division · MSHA ID 4800830
    Abandoned
  42. North Stucco Mine
    Surface metal/non-metal · Wyo-Ben Inc · MSHA ID 4800863
    Abandoned
  43. Porter Gulch Area
    Surface metal/non-metal · Dresser Minerals Division · MSHA ID 4800604
    Abandoned
  44. Rey Pit
    Surface metal/non-metal · Nicholls & Lewis Concrete · MSHA ID 4801126
    Abandoned
  45. Robertson Pit
    Surface metal/non-metal · Nicholls & Lewis Concrete · MSHA ID 4801208
    Abandoned
  46. Snake Mine
    Surface metal/non-metal · Dresser Minerals Division · MSHA ID 4800803
    Abandoned
  47. South Stucco Mine
    Surface metal/non-metal · Wyo-Ben Inc · MSHA ID 4800864
    Abandoned
  48. Stucco Mines
    Surface metal/non-metal · Wyo-Ben Inc · MSHA ID 4801185
    Abandoned
  49. U 75 Pit
    Surface metal/non-metal · Dresser Minerals Division · MSHA ID 4800832
    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.