85% of proposed penalties paid to date, a $164,003 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
1,738
inspections on record
42,307
inspection hours
8.0
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.
3,392 citations across 42,307 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.
$1.1M
proposed penalties
$933K
current assessed
$931K
paid to date
$3K
outstanding
3,329 assessments are final orders; 170 contested dockets.
Of $437K in penalties contested before the Commission, $251K was upheld in final decisions.
As of the most recent assessment on 2026-07-09.
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.
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.
0.69
total case rate
0.26
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
1.59
0.40
0.000
2025
0.69
0.26
0.000
2024
1.06
0.64
0.000
2023
0.66
0.33
0.000
2022
0.79
0.26
0.000
2021
0.89
0.15
0.000
2020
1.27
0.42
0.000
2019
1.72
0.25
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: 2026-07-27
27%
of limit-tested samples over the exposure limit
1,610
samples
443
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz414116 over
Nuisance dust, total, <1% Qtz242 over
Cristobalite, respirable182 over
Mixed Silica22 over
Area samples (mill and shop air)
Last sampled: 2024-11-05
17
samples
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.
When citations were contested
ⓘContesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
546citations taken to the federal commission · 16% of citations on record
Settled
514 · 94%
Stood as issued
23 · 4%
Vacated or withdrawn
8 · 1%
Still open
1 · 0%
48%
S&S designation survived the contest
ⓘCounts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 250 decided S&S contests · industry: 79%
39%
Penalty reduction in decided contests
$407K proposed, $248K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2025-12-29. Vacated and withdrawn citations are removed from the file this view attributes through, so that outcome is slightly undercounted here.
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.
U.S. Silica Company, LLC · Caught in, under or between a moving and a stationary object
Employee was on the ground spotting a dump truck to prepare for dumping a load of fill dirt in excavation area. Employee's back was to the dozer that came up an incline and fatally struck employee from behind.
An employee on the ground level retrieved the tool and climbed 1 to 2 rungs of the ladder to hand the tool to the employee above. The employee appeared to lose consciousness and fell. The witnesses indicated that it appeared the victim was breathing. At 12:01pm, US Silica was informed that the victim had a heart attack and while at the hospital the employee died.
For insurers, brokers, and safety consultants
Where U.S. Silica Company, 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.