Mining Incidents

Thayerville Mine Metal/Non-Metal

Maryland Minerals Inc · Underground
Controlled by Beverly A Critchfield
McHenry, Garrett County, MD  ·  Active
MSHA Mine ID: 1800735

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Fatalities
0
Total incidents
9
Years on record
2000–2016
Latest incident
Jun 2016
Compliance record
MSHA citations since 2000
195
citations
50
significant & substantial
$42,823
proposed penalties
$40,794
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 S&S Per 1M hrs
2025 Q4 10,049 1 0 99.5
2025 Q3 7,991 0 0 0.0
2025 Q2 9,335 0 0 0.0
2025 Q1 6,644 3 1 451.5
2024 Q4 7,645 1 0 130.8
2024 Q3 8,318 0 0 0.0
2024 Q2 11,462 2 0 174.5
2024 Q1 8,451 0 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

9 on file

2016 · 1 incident

June 27, 2016 MD · Metal/Non-Metal utility man, errand boy, service truck operator STEPPING OR KNEELING ON OBJECT
Maryland Minerals Inc · Struck against stationary object

Miner was exiting the water truck. Stepped on rock on the floor which rolled. This slightly tore a ligament in ankle.

2013 · 2 incidents

November 6, 2013 MD · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Maryland Minerals Inc · Struck by... (Not Elsewhere Classified)

Miner was cleaning a tramp magnet. He pulled a piece of steel down and it pulled the piece of steel back up pinching the tip of his index finger.

June 17, 2013 MD · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Maryland Minerals Inc · Struck by... (Not Elsewhere Classified)

The miner was installing a rubber screen. It was too long so he decided to trim off the excess with a utility knife. It slid and caused a laceration to his left forearm approximately 2 1/2" in length.

2010 · 1 incident

March 26, 2010 MD · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDTOOLS (NONPOWERED)
Maryland Minerals Inc · Struck by... (Not Elsewhere Classified)

EE was using a bar to turn a ratchet wrench, pulling toward himself. The bar slipped and hit the EE on the right side of his head.

2007 · 2 incidents

October 8, 2007 MD · Metal/Non-Metal driller operator HANDTOOLS (NONPOWERED)
Maryland Minerals Inc · Over-exertion (Not Elsewhere Classified)

Employee strained his chest muscles while performing maintenance on the underground drill.

February 22, 2007 MD · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Maryland Minerals Inc · Struck by... (Not Elsewhere Classified)

EE was working on a loader that had its cab & transmission removed. He was where the transmission had been, cleaning the area. He raised an access panel on the hood to give himself more room. His hard hat fell off. He stood to replace it, the wind blew the access panel shut striking him in the head before he could replace his hard hat. He required 4 stitches, 1 day off work.

2006 · 1 incident

December 8, 2006 MD · Metal/Non-Metal blaster, shooter, shotfirer, explosive worker, powder gang/monkey HANDLING OF MATERIALS
Maryland Minerals Inc · Struck against stationary object

Bumped head on roof of mine while filling drill holes with explosives

2004 · 1 incident

April 28, 2004 MD · Metal/Non-Metal blaster, shooter, shotfirer, explosive worker, powder gang/monkey POWERED HAULAGE
Maryland Minerals Inc · Struck against a moving object

EMPLOYEE WAS DRIVING A MINE HAUL TRUCK. HE MADE A WRONG TURN IN THE MINE, AND WHEN HE DISCOVERED THE WRONG TURN HE BRAKED WHICH THEN CAUSED THE TRUCK TO SLIDE IN THE MUD SLAMMING INTO THE MINE WALL.

2000 · 1 incident

August 18, 2000 MD · Metal/Non-Metal miner, nec DISORDERS (REPEATED TRAUMA)
Maryland Minerals Inc · Over-exertion (Not Elsewhere Classified)

COMPUTER AND WRITING WORK LEADING TO CARPAL TUNNEL SYNDROME.