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JONESVILLE Metal/Non-Metal

Gerken Materials Inc. · Surface

Controlled by Brent Gerken; Michael J Gerken

Jonesville, Hillsdale County, MI · Intermittent

MSHA Mine ID: 2002932

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Fatalities: 0
Total incidents: 5
Years on record: 2000–2016
Latest incident: May 2016

Compliance record

MSHA citations since 2000

citations

significant & substantial

$11,217

proposed penalties

$11,217

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	3,616	1	276.5
2025 Q3	5,930	0	0.0
2025 Q2	5,361	0	0.0
2025 Q1	2,676	0	0.0
2024 Q4	5,184	2	385.8
2024 Q3	6,125	0	0.0
2024 Q2	5,916	0	0.0
2024 Q1	3,029	0	0.0

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

No fatalities recorded at this mine.

Reportable incidents

5 on file

2016 · 1 incident

May 31, 2016 MI · Metal/Non-Metal outside foreman, leadman HANDLING OF MATERIALS

Glacial Sand & Gravel LLC · Struck by... (Not Elsewhere Classified)

Rock became lodged in vibrating feeder, shut down equipment and locked out. Employee went in feeder to dislodge rock. When doing so employee's foot was hit by metal skirt board bouncing off steel toe boot and broke little toe.

2003 · 1 incident

August 14, 2003 MI · Metal/Non-Metal NO VALUE FOUND

Glacial Sand & Gravel · No Value Found

WHILE PUTTING PATCH ON PIPE FINE, USING CUMALONG TO SQUEASE PATCH AROUND PIPE CHARM BROKE AND HIT IN LEFT KNEE. THERE IS SWELLING AND BRUISE.

2000 · 3 incidents

July 17, 2000 MI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator DISORDERS (REPEATED TRAUMA)

Glacial Sand & Gravel · Over-exertion (Not Elsewhere Classified)

ALLEGED ACCIDENT OCCURRED THROUGHT CONTINUOUS MOTION OF RIGHT ELBOW. ELBOW GETS TIGHT.

March 27, 2000 MI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator MACHINERY

Glacial Sand & Gravel · Flash burns (welding)

WELDER BURN IN EYES.

February 21, 2000 MI · Metal/Non-Metal miner, nec HANDLING OF MATERIALS

Glacial Sand & Gravel · Struck against stationary object

WORKING ON SAND SCREEN AT MINE HIT LEFT KNUCKLE ON A BOLT AND PAIN FROM HEAT FROM EXCESSIVE CLOTHES CAUSED HIM TO LOSE CONSCIOUSNESS FOR AWHILE.