What are Iron Oak Energy Solutions LLC's MSHA penalties?

Iron Oak Energy Solutions LLC has $142K in proposed MSHA penalties on record, $97K paid, and $45K outstanding.

Iron Oak Energy Solutions LLC: 315 MSHA citations controller

MSHA controller ID: 0189021

Watch this controller

Email me when a new MSHA incident is filed at any mine Iron Oak Energy Solutions LLC controls.

Fatalities: 0
Total incidents: 34
Mines on record: 9
Years on record: 2024–2026

Public-issuer link

Emerge Energy Services LP discloses mines under this controller in its SEC Dodd-Frank Section 1503 (EX-95) mine-safety filings.

How to read an EX-95 filing See the issuer mine-safety liability profile

Compliance record

MSHA citations since 2024

315

citations

significant & substantial

$142,190

proposed penalties

$97,418

paid to date

69% of proposed penalties paid to date, a $44,772 gap.

Source: MSHA violations data, updated weekly.

Inspection activity

MSHA inspections since 2024

inspections on record

2,898

inspection hours

10.9

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.

315 citations across 2,898 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.

$142K

proposed penalties

$142K

current assessed

$97K

paid to date

$45K

outstanding

278 assessments are final orders; 1 contested dockets.

Of $583 in penalties contested before the Commission, $583 was upheld in final decisions.

As of the most recent assessment on 2026-06-23.

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.

10.2%

significant & substantial

5.4%

high negligence or reckless

10.2%

reasonably likely or greater

24.8%

permanently disabling or fatal if injury occurs

Negligence coding: 0.3% none, 16.2% low, 78.1% moderate, 5.4% 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.

1.01

total case rate

0.30

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
2026	1.57	0.79
2025	1.01	0.30
2024	3.07	1.23

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: 2026-06-03

12%

of limit-tested samples over the exposure limit

samples

limit-tested

Most sampled contaminants

Quartz, respirable, >1% Qtz212 over
Respirable dust, <.1mg43
Unlisted Particulate, respirable, <1% Qtz2
Unlisted Particulate, total, <1% Qtz1

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.

2 citations taken to the federal commission · 1% of citations on record

Settled 2 · 100%

100%

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 1 decided S&S contests · industry: 79%

Penalty reduction in decided contests

$583 proposed, $583 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 2025-09-18. 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 controller contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.

Docket	Decision	Judge	Year	Proposed / upheld
CENT 2025-0370	Settlement	Paez	2026	$583 → $583

Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.

Top causes

HANDLING OF MATERIALS 11 non-fatal
MACHINERY 6 non-fatal
POWERED HAULAGE 6 non-fatal
HANDTOOLS (NONPOWERED) 5 non-fatal
OTHER 2 non-fatal
SLIP OR FALL OF PERSON 2 non-fatal

Incident timeline

2026

2025

2024

Operators under this controller

Mines on record

For insurers, brokers, and safety consultants

Where Iron Oak Energy Solutions 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.

The federal record itself stays free on this site. What costs money, and why.

See a sample report Need a different cut of the data? Ask us