IROCK #5 Metal/Non-Metal

Magruder Limestone Co · Surface

Controlled by Mark Magruder

Lake Ozark, Miller County, MO · Active

MSHA Mine ID: 2302583

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Compliance record

MSHA citations since 2024

citations

significant & substantial

$1,641

proposed penalties

$1,641

paid to date

Source: MSHA violations data, updated weekly.

Quarterly safety rates

Citations per million employee-hours, as reported to MSHA

Quarter	Hours worked	Citations	Per 1M hrs
2025 Q4	3,892	0	0.0
2025 Q3	3,480	0	0.0
2025 Q2	3,583	2	558.2
2025 Q1	2,611	2	766.0
2024 Q4	3,356	0	0.0
2024 Q3	3,120	0	0.0
2024 Q2	3,320	2	602.4
2024 Q1	2,812	3	1066.9

Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

No fatalities recorded at this mine.

2 on file

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)

Alleged possible noise - Reportable hearing loss

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.