Uranium ore mines in the US: 8 open mines and MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 8 open uranium ore mines in the US, run by 7 operators and employing 188 people. Since January 1, 2022 its inspectors issued 144 citations and orders there with $22,655 in proposed penalties, and operators reported 26 injury or illness cases. The operators with the most open mines are Efr Colorado Plateau LLC; Efr Arizona Strip LLC; Efr White Mesa LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 8
- Operators
- 7
- Employees
- 188
- Active
- 4
- Temporarily Idled
- 3
- NonProducing
- 1
- Citations and orders since January 1, 2022
- 144
- Significant and substantial
- 16 (11.1%)
- Closure orders
- 4
- High negligence or reckless
- 6
- Proposed penalties
- $22,655
- Amount paid so far
- $22,504
- Inspections
- 93
- Inspector hours on site
- 2,169
- Citations per inspection
- 1.55 (all mines 2.30)
- Accident reports
- 26
- Injury and illness cases
- 26
- Fatalities
- 0
- Latest MSHA record
- October 26, 2026
Operators with the most open mines
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Efr Colorado Plateau LLC | 2 | 45 | 63 | $10,029 | 6 |
| Efr Arizona Strip LLC | 1 | 32 | 42 | $6,637 | 7 |
| Efr White Mesa LLC | 1 | 89 | 29 | $4,487 | 13 |
| Cur Henry Mountains Uranium LLC | 1 | 4 | 6 | $906 | 0 |
| Pinon Ridge Mining LLC | 1 | 12 | 4 | $596 | 0 |
| Anfield Resources Holding Corp. | 1 | 3 | 0 | $0 | 0 |
| Disa Technologies, Inc. | 1 | 3 | 0 | $0 | 0 |
Operators with the most citations
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Efr Colorado Plateau LLC | 2 | 45 | 63 | $10,029 | 6 |
| Efr Arizona Strip LLC | 1 | 32 | 42 | $6,637 | 7 |
| Efr White Mesa LLC | 1 | 89 | 29 | $4,487 | 13 |
| Cur Henry Mountains Uranium LLC | 1 | 4 | 6 | $906 | 0 |
| Pinon Ridge Mining LLC | 1 | 12 | 4 | $596 | 0 |
| Anfield Resources Holding Corp. | 1 | 3 | 0 | $0 | 0 |
| Disa Technologies, Inc. | 1 | 3 | 0 | $0 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| La Sal Complex | Efr Colorado Plateau LLC | San Juan County, UT | Uranium ore | 45 | 63 |
| Pinyon Plain Mine | Efr Arizona Strip LLC | Coconino County, AZ | Uranium ore | 32 | 42 |
| White Mesa Mill | Efr White Mesa LLC | San Juan County, UT | Uranium ore | 89 | 29 |
| Tony M | Cur Henry Mountains Uranium LLC | Garfield County, UT | Uranium ore | 4 | 6 |
| Sunday Mine | Pinon Ridge Mining LLC | San Miguel County, CO | Uranium ore | 12 | 4 |
| Mobile Hpsa Remediation Equipment | Disa Technologies, Inc. | Montrose County, CO | Uranium ore | 3 | 0 |
| Velvet Mine | Anfield Resources Holding Corp. | San Juan County, UT | Uranium ore | 3 | 0 |
| Energy Queen | Efr Colorado Plateau LLC | San Juan County, UT | Uranium ore | 0 | 0 |
States
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 1 | 0 | $234 | 1 |
| 2023 | 21 | 2 | $3,326 | 6 |
| 2024 | 27 | 2 | $4,169 | 5 |
| 2025 | 54 | 6 | $8,353 | 6 |
| 2026 | 41 | 6 | $6,573 | 8 |
Standards cited most at uranium ore mines
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 8 |
| 30 CFR 57.5039 | Underground metal and nonmetal mines | 5 |
| 30 CFR 57.15004 | Underground metal and nonmetal mines | 4 |
| 30 CFR 57.4201 | Underground metal and nonmetal mines | 4 |
| 30 CFR 57.12018 | Underground metal and nonmetal mines | 4 |
| 30 CFR 57.12030 | Underground metal and nonmetal mines | 4 |
| 30 CFR 62.130 | Occupational noise exposure | 4 |
| 30 CFR 47.41 | Hazard communication | 4 |
| 30 CFR 57.11058 | Underground metal and nonmetal mines | 4 |
| 30 CFR 57.14100 | Underground metal and nonmetal mines | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 4 |
| 30 CFR 57.14107 | Underground metal and nonmetal mines | 3 |
| 30 CFR 57.12032 | Underground metal and nonmetal mines | 3 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 3 |
Injury and illness cases at uranium ore mines
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 10 |
| No lost time, or an occupational illness | 16 |
What the accident reports at uranium ore mines describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 9 |
| Handling of materials | 6 |
| Handtools (nonpowered) | 5 |
| Slip or fall of person | 3 |
| Fall of roof or back | 2 |
| Stepping or kneeling on object | 1 |
Equipment named in accident reports at uranium ore mines
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 5 |
| Rock drill | 4 |
| Hand tools (powered) | 3 |
| Air compressor | 1 |
| Mucking machine | 1 |
| Bench grinder | 1 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.