Mining Incidents

Martin Marietta Materials, Inc. operator

MSHA operator ID: L16197
Fatalities
11
Total incidents
1445
Mines on record
201
Years on record
1987–2026
Compliance record
MSHA citations since 2000
12,462
citations
2,296
significant & substantial
$5,069,578
proposed penalties
$4,159,981
paid to date
82% of proposed penalties paid to date, a $909,597 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
10,022
inspections on record
201,933
inspection hours
6.2
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.
12,462 citations across 201,933 inspection hours.
Source: MSHA inspections data, updated weekly.
Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$5.1M
proposed penalties
$4.2M
current assessed
$4.2M
paid to date
$26K
outstanding
12,132 assessments are final orders; 412 contested dockets.
As of the most recent assessment on 2026-05-28.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.

Top causes

Incident timeline

2026
15
2025
47 (1f)
2024
52 (2f)
2023
47
2022
44
2021
49
2020
49 (1f)
2019
63
2018
49
2017
50
2016
73 (1f)
2015
49
2014
45 (1f)
2013
62
2012
56 (1f)
2011
66
2010
58 (1f)
2009
49
2008
72
2007
5

Mines on record

Fatalities under this operator

11 recorded
March 5, 2025 NC · Metal/Non-Metal welder (non-shop) Fatality · POWERED HAULAGE
Martin Marietta Materials, Inc. · Caught in, under or between running or meshing objects

Employee was found entangled in conveyor 12 tail pulley. Responding authorities pronounced the employee deceased. Incident is still under investigation.

April 15, 2024 CO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech Fatality · POWERED HAULAGE
Martin Marietta Materials Inc · Caught in, under or between a moving and a stationary object

Employee was fatally injured while working on a conveyor system.

April 13, 2024 GA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator Fatality · OTHER
Martin Marietta Materials, Inc. · Drowning

Based on investigation to date, employee suffered a personal medical event (cardiac arrest). "Per Prelim: After washing a concrete pad, a miner drowned in a two-foot-deep pool of water."

August 21, 2020 IA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver Fatality · MACHINERY
Martin Marietta Materials Inc. · Struck by falling object

Customer driver was found unresponsive outside the customer's truck. Cause of death is unknown.

March 22, 2016 IA · Metal/Non-Metal outside foreman, leadman Fatality · EXPLOSIVES AND BREAKING AGENTS
Martin Marietta Materials Inc. · Struck by flying object

On March 22, 2016 at approximately 6:35pm an employee was struck by flyrock after a shot was detonated. The employee was sitting inside of a pickup approximately 1,200 feet away from the shot when detonated. This incident resulted in a fatality.

February 27, 2014 IA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech Fatality · SLIP OR FALL OF PERSON
Martin Marietta Materials, Inc. · Fall from machine

Emp a contract worker repairing a Scaler in Mod 12. The emp had fallen to the ground in fetal position, locked arms, clenched fist and bleeding from the ears. The witness did not know if the emp fell from a height or ground level. The injured emp was airlifted. He was lacking oxygen to brain for 10 minutes. He was pronounced dead at 9:45AM on Feb 28.

October 24, 2012 NE · Metal/Non-Metal utility man, errand boy, service truck operator Fatality · POWERED HAULAGE
Martin Marietta Materials Inc · Struck against a moving object

Forklift turned over - The miner was operating a forklift, traveling on a decline toward the mine entrance, when the forklift went out of control. The forklift struck a concrete support for the belt conveyor and overturned, killing him.

October 10, 2010 OK · Metal/Non-Metal electrician helper Fatality · ELECTRICAL
Martin Marietta Materials, Inc. · Flash burns (electric)

The investigation into the accident is on-going, but as of now, it appears as the three employees were installing ground vault indicator lights when an ach flash occurred, injuring them. The employees were transported to the hospital.

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The full compliance file on Martin Marietta Materials, Inc.

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.