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MSHA mine register by county

Mines in Weston County, Wyoming

Weston County, Wyoming has 24 mines on MSHA's register: 3 intermittent, 17 abandoned. 1 are coal mines and 23 metal or non-metal. 126 accidents have been reported at these mines between 1983 and 2024. Inspectors have issued 329 citations.

Every mine MSHA has registered in Weston 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 Weston County →

Mines on register
24
Active
0
Fatalities on record
0
Citations issued
329
2 underground · 22 surface · 0 facilities 1 coal · 23 metal and non-metal 3 intermittent 17 abandoned 126 reported accidents, 1983–2024
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.
Weston County, Wyoming · Population 6,835
14.4%
Mining share of county employment
$87,545
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
American Colloid Company Minerals Group 3 0 0
Black Hills Bentonite A Limited Liability Co 2 0 0
Dan Hart Patrol Service LLC 2 0 0
Gilpatrick Construction Company Inc 2 0 0
Wyoming Earthmoving Corporation 2 0 0
Federal Bentonite Div/Aurora Metal Company 1 0 0
Fisher Sand & Gravel Company 1 0 0
Kenneth Thompson 1 0 0
Lamb Construction Company 1 0 0
LoneHart, LLC 1 0 0
Mines in Weston County24 on register
  1. UPTON MILL & MINE
    Surface metal/non-metal · American Colloid Company Minerals Group · MSHA ID 4800059
    Abandoned
  2. Thornton Plant
    Surface metal/non-metal · Black Hills Bentonite A Limited Liability Co · MSHA ID 4801042
    Intermittent
  3. OSHOTO MINE
    Surface metal/non-metal · Black Hills Bentonite · MSHA ID 4801376
    Intermittent
  4. Upton Mine
    Surface metal/non-metal · American Colloid Company Minerals Group · MSHA ID 4800807
    Abandoned
  5. Fisher Industries Plant 21
    Surface metal/non-metal · Fisher Sand & Gravel Company · MSHA ID 4801400
    Temporarily Idled
  6. Osage Field Project
    Underground metal/non-metal · Rock Well Petroleum (U.S.), Inc · MSHA ID 4801706
    Abandoned
  7. Habeck Gravel Pit
    Surface metal/non-metal · Timberline Aggregates, LLC. · MSHA ID 4801771
    Intermittent
  8. Screen Number 2
    Surface metal/non-metal · Dan Hart Patrol Service LLC · MSHA ID 4801684
    Abandoned
  9. Wagner Scoria Pit
    Surface metal/non-metal · Wagner Ranch Services, LLC · MSHA ID 4801787
    Temporarily Idled
  10. Screen Number 1
    Surface metal/non-metal · Dan Hart Patrol Service LLC · MSHA ID 4801652
    Abandoned
  11. Banks Silver Creek Pit
    Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4801234
    Abandoned
  12. Dry Fork Pit #2
    Surface metal/non-metal · LoneHart, LLC · MSHA ID 4801713
    Abandoned
  13. Fawcet Pit No 2
    Surface metal/non-metal · Kenneth Thompson · MSHA ID 4801089
    Abandoned
  14. Government Quarry No 1
    Surface metal/non-metal · Lamb Construction Company · MSHA ID 4801041
    Abandoned
  15. Grieves Pit
    Surface metal/non-metal · Weston County Highway Department · MSHA ID 4801153
    Abandoned
  16. Metso Nordberg HP400 Cone Crusher
    Surface metal/non-metal · Wyoming Earthmoving Corporation · MSHA ID 4801913
    Temporarily Idled
  17. Mill Fall Run Mine #1
    Underground coal · LID Not Available · MSHA ID 4808480
    Abandoned
  18. Newcastle Quarry
    Surface metal/non-metal · Summit Materials Inc · MSHA ID 4801321
    Abandoned
  19. Old Gold Mine
    Surface metal/non-metal · American Colloid Company Minerals Group · MSHA ID 4801101
    Abandoned
  20. Osage Mine
    Surface metal/non-metal · Federal Bentonite Div/Aurora Metal Company · MSHA ID 4800619
    Abandoned
  21. Roby Pit
    Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4801233
    Abandoned
  22. Superbase Screen
    Surface metal/non-metal · Wyoming Earthmoving Corporation · MSHA ID 4801914
    Temporarily Idled
  23. Vondriska Quarry
    Surface metal/non-metal · R J Studer & Sons · MSHA ID 4801299
    Abandoned
  24. Weston County Mine
    Surface metal/non-metal · Weston County Roads & Bridges Department · MSHA ID 4801313
    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.