89% of proposed penalties paid to date, a $28,270 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2007
601
inspections on record
10,653
inspection hours
7.9
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.
840 citations across 10,653 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.
$250K
proposed penalties
$223K
current assessed
$222K
paid to date
$872
outstanding
823 assessments are final orders; 47 contested dockets.
Of $70K in penalties contested before the Commission, $36K was upheld in final decisions.
As of the most recent assessment on 2026-06-15.
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.
0.61
total case rate
0.15
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
0.55
0.00
0.000
2025
0.61
0.15
0.000
2024
0.50
0.00
0.000
2023
0.60
0.00
0.000
2022
0.25
0.00
0.000
2021
0.32
0.32
0.319
2020
1.12
0.37
0.000
2019
1.56
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: 2026-04-14
0%
of limit-tested samples over the exposure limit
161
samples
44
limit-tested
Most sampled contaminants
Respirable dust, <.1mg99
Nuisance dust, respirable, <1% Qtz27
Quartz, respirable, >1% Qtz27
Unlisted Particulate, respirable, <1% Qtz8
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.
76citations taken to the federal commission · 9% of citations on record
Settled
67 · 88%
Stood as issued
6 · 8%
Vacated or withdrawn
2 · 3%
Still open
1 · 1%
76%
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 37 decided S&S contests · industry: 79%
43%
Penalty reduction in decided contests
$64K proposed, $36K 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 2025-09-15. 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.
Martin Marietta Materials Southwest, LLC · Caught in, under or between a moving and a stationary object
Customer truck driver pulled into tarping area behind another truck and failed to set parking brake before exiting the truck. The driver did not use wheel chocks as required. The customer truck driver was fatally injured when customer's truck moved forward and pinned customer truck driver against the other drivers truck.
For insurers, brokers, and safety consultants
Where Martin Marietta Materials Southwest, 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.