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Carderock Quarries Metal/Non-Metal

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

Carderock Quarries has $13K in proposed MSHA penalties and $453 outstanding across 23 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
9
Years on record
1995–2013
Latest incident
Aug 2013
Compliance record
MSHA citations since 2001
98
citations
12
significant & substantial
$13,061
proposed penalties
$10,517
paid to date
81% of proposed penalties paid to date, a $2,544 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
60
inspections on record
906
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: 906 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Carderock Quarries has $13K in proposed MSHA penalties and $453 outstanding across 23 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.
$13K
proposed penalties
$11K
current assessed
$11K
paid to date
$453
outstanding
94 assessments are final orders; 23 contested dockets.
As of the most recent assessment on 2026-04-22.
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 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
Show 95 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 17,825 0 0 0.0
2023 Q3 16,973 3 0 176.8
2023 Q2 17,430 0 0 0.0
2023 Q1 17,606 2 0 113.6
2022 Q4 16,299 0 0 0.0
2022 Q3 16,053 0 0 0.0
2022 Q2 15,548 0 0 0.0
2022 Q1 15,728 2 0 127.2
2021 Q4 15,864 0 0 0.0
2021 Q3 15,624 3 0 192.0
2021 Q2 16,586 0 0 0.0
2021 Q1 14,972 2 0 133.6
2020 Q4 14,981 0 0 0.0
2020 Q3 17,149 1 0 58.3
2020 Q2 15,651 0 0 0.0
2020 Q1 14,493 0 0 0.0
2019 Q4 17,741 3 0 169.1
2019 Q3 16,267 0 0 0.0
2019 Q2 16,743 5 0 298.6
2019 Q1 15,863 0 0 0.0
2018 Q4 16,325 0 0 0.0
2018 Q3 17,065 1 1 58.6
2018 Q2 16,870 0 0 0.0
2018 Q1 16,454 3 1 182.3
2017 Q4 17,919 0 0 0.0
2017 Q3 18,188 0 0 0.0
2017 Q2 17,387 4 1 230.1
2017 Q1 17,138 2 0 116.7
2016 Q4 16,622 0 0 0.0
2016 Q3 12,959 1 1 77.2
2016 Q2 11,065 0 0 0.0
2016 Q1 11,894 2 2 168.2
2015 Q4 11,092 0 0 0.0
2015 Q3 11,391 0 0 0.0
2015 Q2 9,588 0 0 0.0
2015 Q1 9,366 2 0 213.5
2014 Q4 11,562 0 0 0.0
2014 Q3 11,234 1 0 89.0
2014 Q2 11,063 0 0 0.0
2014 Q1 10,741 1 0 93.1
2013 Q4 13,188 0 0 0.0
2013 Q3 11,846 0 0 0.0
2013 Q2 11,410 0 0 0.0
2013 Q1 10,410 1 0 96.1
2012 Q4 11,210 0 0 0.0
2012 Q3 12,079 0 0 0.0
2012 Q2 11,259 2 0 177.6
2012 Q1 10,627 0 0 0.0
2011 Q4 10,350 1 0 96.6
2011 Q3 9,786 0 0 0.0
2011 Q2 11,206 6 1 535.4
2011 Q1 10,369 0 0 0.0
2010 Q4 11,384 2 0 175.7
2010 Q3 12,099 1 0 82.7
2010 Q2 11,182 0 0 0.0
2010 Q1 9,754 0 0 0.0
2009 Q4 10,107 0 0 0.0
2009 Q3 10,832 0 0 0.0
2009 Q2 9,567 0 0 0.0
2009 Q1 8,482 0 0 0.0
2008 Q4 13,031 2 0 153.5
2008 Q3 14,180 0 0 0.0
2008 Q2 17,048 0 0 0.0
2008 Q1 16,468 3 0 182.2
2007 Q4 17,564 0 0 0.0
2007 Q3 17,445 1 0 57.3
2007 Q2 17,750 0 0 0.0
2006 Q4 17,098 0 0 0.0
2006 Q3 16,312 3 0 183.9
2006 Q2 17,963 0 0 0.0
2006 Q1 16,578 8 1 482.6
2005 Q4 17,642 0 0 0.0
2005 Q3 16,938 1 1 59.0
2005 Q2 15,924 0 0 0.0
2005 Q1 14,238 0 0 0.0
2004 Q4 14,040 0 0 0.0
2004 Q3 13,056 0 0 0.0
2004 Q2 12,044 0 0 0.0
2004 Q1 12,344 0 0 0.0
2003 Q4 13,333 0 0 0.0
2003 Q3 10,360 18 2 1737.5
2003 Q2 10,328 0 0 0.0
2003 Q1 10,109 0 0 0.0
2002 Q4 12,655 0 0 0.0
2002 Q3 13,616 0 0 0.0
2002 Q2 13,454 0 0 0.0
2002 Q1 12,038 2 0 166.1
2001 Q4 11,902 0 0 0.0
2001 Q3 11,690 3 0 256.6
2001 Q2 11,663 0 0 0.0
2001 Q1 11,609 0 0 0.0
2000 Q4 14,316 0 0 0.0
2000 Q3 14,683 0 0 0.0
2000 Q2 11,530 0 0 0.0
2000 Q1 11,130 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

9 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.

1996 · 1 incident

1995 · 1 incident

March 1, 1995 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

INJURED WAS SCALING THE SOUTH FACE OF THE QUARRYSOME STONES FELL FROM ABOVE HIS LOCATION, KNOCK ING OFF HIS HARDHAT AND STRIKING HIM ON THE TOP OF THE HEAD, LACERATING HIS SCALP, REQUIRING STITCHES. MINERS FAILURE TO SCALE ABOVE WORK AREA BEFORE HAND CONTRIBUTED TO THE INQUIRY.

For insurers, brokers, and safety consultants

The full compliance file on Carderock Quarries

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.

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