Mining Incidents

Carderock Quarries Metal/Non-Metal

Bethesda, Montgomery County, MD  ·  Active
MSHA Mine ID: 1800404

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Fatalities
0
Total incidents
7
Years on record
2000–2013
Latest incident
Aug 2013
Compliance record
MSHA citations since 2001
98
citations
12
significant & substantial
$12,759
proposed penalties
$10,517
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 14,770 1 0 67.7
2025 Q3 13,801 1 0 72.5
2025 Q2 13,311 0 0 0.0
2025 Q1 12,482 0 0 0.0
2024 Q4 17,559 0 0 0.0
2024 Q3 18,040 1 1 55.4
2024 Q2 18,918 0 0 0.0
2024 Q1 16,318 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

7 on file

2013 · 1 incident

August 6, 2013 MD · Metal/Non-Metal ledgeman/hand, quarry man HANDTOOLS (NONPOWERED)
Tri-State Stone & Building Supply Inc. · Struck by flying object

While breaking stone, EE was hit in the left forearm by a foreign object, causing a laceration. No stitches were required nor time lost. However, on 9/30/13 a small metal shard was discovered at the healed wound site and removed. EE returned to work 10/14/13 at regular job at full capacity.

2006 · 3 incidents

August 24, 2006 MD · Metal/Non-Metal ledgeman/hand, quarry man HANDLING OF MATERIALS
Tri-State Stone & Building Supply Inc. · Caught in, under or between (Not Elsewhere Classified)

Miner was hand loading building stone when his L thumb was caught between 2 stones when another miner inadvertinly dropped a stone. The finger was lacerated, requiring sutures, and is fractured, requiring splinting.

August 8, 2006 MD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Tri-State Stone & Building Supply Inc. · Caught in, under or between (Not Elsewhere Classified)

Miner was hand-loading building stone, when his left thumb was pinched between 2 stones. His thumb is bruised and has a slight fracture. The Dr. splinted the thumb and instructed him not to use his left hand for one week.

2005 · 1 incident

April 21, 2005 MD · Metal/Non-Metal ledgeman/hand, quarry man FALL OF FACE/RIB/PILLAR/SIDE/HIGHWALL
Tri-State Stone & Building Supply Inc. · Struck by falling object

EE WAS SCALING THE LEDGE WHEN HE MOVED HIS ROPE WHICH DISLODGED LOOSE MATERIAL FROM ABOVE. THIS MATERIAL KNOCKED HIS HARD HAT OFF AND A SUBSEQUENT PIECE OF FALLING MATERIAL STRUCK HIS HEAD, CAUSING A LACERATION THAT NEEDED STITCHES. FAILURE TO PROPERLY CLEAN THE ROPE'S DRAG PATH CONTRIBUTED TO THE ACCIDENT.

2000 · 2 incidents

May 17, 2000 MD · Metal/Non-Metal miner, nec HANDTOOLS (NONPOWERED)
Tri-State Stone & Building Supply Inc. · Struck by... (Not Elsewhere Classified)

LACERATION LEFT INDEX FINGER. I WAS BREAKING STONE WHEN A STONE HE HAD SPLIT FELL TOWARDS HIM. IN AN ATTEMPT TO STOP IT FROM STRIKING HIS LEG, HE TRIED TO GRAB OR DEFLECT IT. THE SHARP EDGE OF THE STONE CUT THROUGH HIS GLOVE AND LACERATED AND SMASHED HIS FINGER AGAINST ANOTHER STONE.