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MSHA mine register by county

Mines in Custer County, Idaho

Custer County, Idaho has 52 mines on MSHA's register: 1 active, 3 intermittent, 48 abandoned. 1 miner has died and 615 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 470 citations.

Every mine MSHA has registered in Custer 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 Custer County →

Mines on register
52
Active
1
Fatalities on record
1
Citations issued
470
23 underground · 25 surface · 4 facilities 0 coal · 52 metal and non-metal 3 intermittent 48 abandoned 615 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.
Custer County, Idaho · Population 4,411
1.0%
Mining share of county employment
$56,957
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
United States Antimony Corp 8 0 0
Myko Inc 3 0 0
Fisher International Inc 2 0 0
Hecla Mining Company 2 0 0
The Rock Works Mining Inc 2 0 0
Umont Mining Company 2 0 0
Thompson Creek Mining Company 1 1 1
3BW LLC 1 0 0
American Industrial Minerals 1 0 0
Arizona-Idaho Mining LLC 1 0 0
Mines in Custer County52 on register
  1. Thompson Creek Mine
    Surface metal/non-metal · Thompson Creek Mining Company · MSHA ID 1000531
    Active
  2. Three Rivers Stone Corp
    Surface metal/non-metal · Three Rivers Stone Corporation · MSHA ID 1001672
    Abandoned
  3. GROUSE CREEK UNIT
    Surface metal/non-metal · Hecla Mining Company · MSHA ID 1001552
    Abandoned
  4. Clayton Silver Mines Inc
    Facility metal/non-metal · Clayton Silver Mines Inc · MSHA ID 1000142
    Abandoned
  5. Yankee Fork Silver & Gold Mill
    Facility metal/non-metal · United States Antimony Corp · MSHA ID 1001500
    Abandoned
  6. Grouse Creek Venture
    Underground metal/non-metal · Hecla Mining Company · MSHA ID 1001893
    Abandoned
  7. Darlington Mine
    Surface metal/non-metal · US Calcium LLC · MSHA ID 1002277
    Intermittent
  8. Estes Mountain Mines
    Underground metal/non-metal · United States Antimony Corp · MSHA ID 1001558
    Abandoned
  9. Red Bird Mine
    Underground metal/non-metal · United States Antimony Corp · MSHA ID 1001644
    Abandoned
  10. Salmon River Red
    Surface metal/non-metal · Rock Works Mining Inc · MSHA ID 1002019
    Abandoned
  11. C R M PIT #1
    Surface metal/non-metal · 3BW LLC · MSHA ID 1001888
    Intermittent
  12. Charles Dickens
    Underground metal/non-metal · United States Antimony Corp · MSHA ID 1001559
    Abandoned
  13. Lost Packer Mine
    Underground metal/non-metal · Lost Packer Mining Company · MSHA ID 1001469
    Abandoned
  14. Rams Horn
    Surface metal/non-metal · The Rock Works Mining Inc · MSHA ID 1001963
    Abandoned
  15. Portable #1
    Surface metal/non-metal · Salmon River Sand & Gravel · MSHA ID 1002039
    Abandoned
  16. Yankee Fork Pit
    Surface metal/non-metal · Sluder Construction · MSHA ID 1001050
    Abandoned
  17. Black Mine
    Underground metal/non-metal · M & S Mining Company · MSHA ID 1001501
    Abandoned
  18. Bulldog Mine
    Surface metal/non-metal · Greyhound Mining & Milling Inc · MSHA ID 1001479
    Abandoned
  19. Carbonate Mine
    Underground metal/non-metal · Fisher International Inc · MSHA ID 1000417
    Abandoned
  20. Carbonate Mine
    Underground metal/non-metal · Fisher International Inc · MSHA ID 1001652
    Abandoned
  21. Crazy Lumberjack
    Surface metal/non-metal · Arizona-Idaho Mining LLC · MSHA ID 1002032
    Abandoned
  22. Custer Mine
    Surface metal/non-metal · United States Antimony Corp · MSHA ID 1001734
    Abandoned
  23. Cyprus Mining Project #2
    Surface metal/non-metal · Liberty Drilling & Pump Company · MSHA ID 1001431
    Abandoned
  24. Empire
    Underground metal/non-metal · Konnex Resources, Inc. · MSHA ID 1002294
    Abandoned
  25. Empire Mill
    Facility metal/non-metal · Myko Inc · MSHA ID 1000457
    Abandoned
  26. Greyhound Mine
    Underground metal/non-metal · Yanke Machine Shop Inc · MSHA ID 1001352
    Abandoned
  27. Hoodoo Mine
    Surface metal/non-metal · Dick Black · MSHA ID 1000503
    Abandoned
  28. Horseshoe Mine
    Underground metal/non-metal · Myko Inc · MSHA ID 1000213
    Abandoned
  29. Jehovah-Shammah
    Underground metal/non-metal · Shama Mineral-Chemical & Oil · MSHA ID 1001025
    Abandoned
  30. MAHOGANY MINE
    Surface metal/non-metal · American Industrial Minerals · MSHA ID 1001964
    Abandoned
  31. Maranatha Mill
    Facility metal/non-metal · Maranatha Milling Company Inc · MSHA ID 1001568
    Abandoned
  32. Mill Creek Project
    Underground metal/non-metal · Domestic Power Development Company · MSHA ID 1001236
    Abandoned
  33. Mobile Screen Plant
    Surface metal/non-metal · P-Diamond LLC · MSHA ID 1002355
    Intermittent
  34. Montana Gulch Placer Mine
    Surface metal/non-metal · Mandymet Inc · MSHA ID 1001451
    Abandoned
  35. Obsidian Pit
    Surface metal/non-metal · Western Construction Inc · MSHA ID 1001407
    Abandoned
  36. Pacific 9a Mine
    Underground metal/non-metal · Umont Mining Company · MSHA ID 1000691
    Abandoned
  37. Phi Kappa Mine
    Underground metal/non-metal · Myko Inc · MSHA ID 1001262
    Abandoned
  38. PIONEER
    Surface metal/non-metal · Lost River Highway District · MSHA ID 1001995
    Abandoned
  39. R & S Mine
    Underground metal/non-metal · R & S Mining Company · MSHA ID 1001629
    Abandoned
  40. Rain In The Face
    Underground metal/non-metal · R M Barrett · MSHA ID 1000955
    Abandoned
  41. Ramshorn Slate Quarry
    Surface metal/non-metal · Stone Peddler Quarries · MSHA ID 1001833
    Abandoned
  42. RD. VALLEY REDI MIX
    Surface metal/non-metal · Rd Valley Redi Mix Inc · MSHA ID 1001879
    Abandoned
  43. Rob Roy
    Underground metal/non-metal · United States Antimony Corp · MSHA ID 1001631
    Abandoned
  44. Salmon River Scheelite Mill
    Underground metal/non-metal · R M Barrett · MSHA ID 1000526
    Abandoned
  45. Sandy J
    Surface metal/non-metal · United States Antimony Corp · MSHA ID 1001607
    Abandoned
  46. Seafoam Mine
    Underground metal/non-metal · Umont Mining Company · MSHA ID 1001546
    Abandoned
  47. Sill Mine
    Underground metal/non-metal · Leroy Davis Leonard Fisher Partners · MSHA ID 1001314
    Abandoned
  48. Tenth Hole
    Surface metal/non-metal · Lost River Ready Mix · MSHA ID 1002117
    Abandoned
  49. Tungsten Jim Mine
    Underground metal/non-metal · Centennial Development Company · MSHA ID 1000223
    Abandoned
  50. Valley Creek
    Underground metal/non-metal · United States Antimony Corp · MSHA ID 1001755
    Abandoned
  51. Washington Mine
    Surface metal/non-metal · Washington Peak Mining Company · MSHA ID 1001006
    Abandoned
  52. Yankee Fork Placer
    Surface metal/non-metal · International Minerals & Development Corp · MSHA ID 1001640
    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 IdahoAll 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.