Alleged possible noise - Reportable hearing loss
IROCK #5 Metal/Non-Metal
Magruder Limestone Co
· Surface
Controlled by
Mark Magruder
Lake Ozark,
Miller County,
MO
·
Active
MSHA Mine ID: 2302583
IROCK #5 has $2K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 2
- Years on record
- 2024–2026
- Latest incident
- Jan 2026
Compliance record
MSHA citations since 2024
11
citations
0
significant & substantial
$1,641
proposed penalties
$1,641
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2023
7
inspections on record
98
inspection hours
n/a
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.Rate withheld: 98 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
IROCK #5 has $2K in proposed MSHA penalties and $0 outstanding across 0 contested dockets.
Penalty disposition
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
11 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-01-21.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also
the operator's enforcement record
Quarterly safety rates
ⓘ
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.Citations per million employee-hours, as reported to MSHA
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2025 Q4 | 3,892 | 0 | 0 | 0.0 |
| 2025 Q3 | 3,480 | 0 | 0 | 0.0 |
| 2025 Q2 | 3,583 | 2 | 0 | 558.2 |
| 2025 Q1 | 2,611 | 2 | 0 | 766.0 |
| 2024 Q4 | 3,356 | 0 | 0 | 0.0 |
| 2024 Q3 | 3,120 | 0 | 0 | 0.0 |
| 2024 Q2 | 3,320 | 2 | 0 | 602.4 |
| 2024 Q1 | 2,812 | 3 | 0 | 1066.9 |
Show 1 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2023 Q4 | 2,924 | 0 | 0 | 0.0 |
No fatalities recorded at this mine.
Reportable incidents
2 on file2026 · 1 incident
January 30, 2026
MO · Metal/Non-Metal
laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman
DISORDERS (REPEATED TRAUMA)
Magruder Limestone Co · (Not Elsewhere Classified)
2024 · 1 incident
August 29, 2024
MO · Metal/Non-Metal
laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman
HANDLING OF MATERIALS
Magruder Limestone Co · Struck by falling object
Fueling the jaw crusher, EE lifted the cover which had a broken strut. While attempting to secure the lid, it fell onto EE's left arm.
For insurers, brokers, and safety consultants
The full compliance file on IROCK #5
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.