MP Mine Operations, LLC.: 306 MSHA citations operator
Controlled by
MP Materials Corporation
MSHA operator ID: 0154633
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Email me when a new MSHA incident is filed at any MP Mine Operations, LLC. mine.
- Fatalities
- 0
- Total incidents
- 96
- Mines on record
- 1
- Years on record
- 2018–2026
Compliance record
MSHA citations since 2018
306
citations
54
significant & substantial
$199,431
proposed penalties
$181,077
paid to date
91% of proposed penalties paid to date, a $18,354 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2018
86
inspections on record
2,549
inspection hours
12.0
citations per 100 inspection hours
ⓘ
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.306 citations across 2,549 inspection hours.
Source: MSHA inspections data, updated weekly.
Penalty disposition
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.$199K
proposed penalties
$199K
current assessed
$181K
paid to date
$18K
outstanding
275 assessments are final orders; 2 contested dockets.
Of $2K in penalties contested before the Commission, $2K was upheld in final decisions.
As of the most recent assessment on 2026-05-28.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘ
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.17.8%
significant & substantial
12.5%
high negligence or reckless
17.8%
reasonably likely or greater
30.6%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 19.7% low, 67.8% moderate, 12.5% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
Injury rate, 2025
ⓘ
This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.1.30
total case rate
0.35
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
| Year | total case rate | days-away | fatal |
|---|---|---|---|
| 2026 | 2.72 | 1.63 | 0.000 |
| 2025 | 1.30 | 0.35 | 0.000 |
| 2024 | 1.74 | 0.00 | 0.000 |
| 2023 | 1.72 | 0.00 | 0.000 |
| 2022 | 0.56 | 0.00 | 0.000 |
| 2021 | 2.16 | 0.00 | 0.000 |
| 2020 | 6.22 | 0.44 | 0.000 |
| 2019 | 1.62 | 0.00 | 0.000 |
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Health sampling
ⓘ
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.Metal and nonmetal contaminants (personal samples)
ⓘ
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.
Last sampled: 2026-07-21
ⓘ
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.0%
of limit-tested samples over the exposure limit
24
samples
4
limit-tested
Most sampled contaminants
- Quartz, respirable, >1% Qtz7
- Unlisted Particulate, respirable, <1% Qtz7
- Fibers, >5um3
- Respirable dust, <.1mg3
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.
Contested penalties
ⓘ
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.Largest penalties this operator contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
| Docket | Decision | Judge | Year | Proposed / upheld |
|---|---|---|---|---|
| WEST 2023-0336 | Settlement | Manning | 2023 | $1K → $1K |
| WEST 2023-0344 | Settlement | Simonton | 2024 | $1K → $1K |
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Top causes
- SLIP OR FALL OF PERSON 38 non-fatal
- HANDLING OF MATERIALS 29 non-fatal
- MACHINERY 9 non-fatal
- OTHER 7 non-fatal
- HANDTOOLS (NONPOWERED) 6 non-fatal
- POWERED HAULAGE 3 non-fatal
Incident timeline
2026
17
2025
15
2024
13
2023
13
2022
3
2021
8
2020
14
2019
3
2018
10
Mines on record
For insurers, brokers, and safety consultants
Where MP Mine Operations, LLC. stands on silica, penalties, and injury rate
MSHA's standard limits respirable silica to 50 micrograms per cubic metre, but MSHA publishes dust and quartz as separate files and never the silica figure itself. We derive it per sample, score it against the limit, and set the operator's injury rate against a benchmark built from the full MSHA operator record. With the 26-year penalty trail, contest posture, and fatality history. Delivered as a PDF with the underlying data as CSV.
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