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Summit Materials LLC controller

MSHA controller ID: M02046

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Email me when a new MSHA incident is filed at any mine Summit Materials LLC controls.

Fatalities
7
Total incidents
561
Mines on record
120
Years on record
1983–2026
Compliance record
MSHA citations since 2000
6,797
citations
1,265
significant & substantial
$4,233,659
proposed penalties
$3,590,257
paid to date
85% of proposed penalties paid to date, a $643,402 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
4,091
inspections on record
72,933
inspection hours
9.3
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.
6,797 citations across 72,933 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.
$4.2M
proposed penalties
$3.7M
current assessed
$3.6M
paid to date
$72K
outstanding
6,657 assessments are final orders; 140 contested dockets.
As of the most recent assessment on 2026-05-06.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.

Top causes

Incident timeline

2026
14
2025
24
2024
44
2023
43 (1f)
2022
27
2021
43 (2f)
2020
23
2019
33
2018
28
2017
28
2016
33
2015
25 (1f)
2014
11
2013
28 (1f)
2012
23
2011
12
2010
2
2009
3
2008
4
2007
4
2006
4 (1f)
2004
3
2003
2
2002
2
2001
1
2000
3 (1f)
1999
4
1997
2
1996
5
1995
8
1994
2
1993
6
1992
9
1991
7
1990
6
1989
10
1988
5
1987
13
1986
4
1985
7
1984
1
1983
5

Operators under this controller

Mines on record

Fatalities under this controller

7 recorded
June 1, 2023 TX · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver Fatality · MACHINERY
Alleyton Resource Company, LLC. · Struck by rolling or sliding object

An outside truck driver came onto this site to get loaded where the driver then parked their truck and was out of view from out scale house. Driver began to work on the back of the truck where the air bag blew out from under the truck and hit the driver in the head. Driver was not our employee, nor was the driver supposed to be working on their truck.

October 20, 2021 TX · Metal/Non-Metal welder (non-shop) Fatality · MACHINERY
Alleyton Resource Company, LLC. · Struck by powered moving object

An employee was fatally injured during maintenance work on the hopper. EE was operating a CAT forklift in close proximity to a Volvo excavator. EE exited the vehicle without notifying the other employees working in the area. Other employees stated they heard a "pop" and found the forklift operator unconscious next to the fork of the forklift.

February 25, 2021 NV · Metal/Non-Metal hydrate plant operator Fatality · SLIP OR FALL OF PERSON
Sierra Ready Mix · Fall from headframe, derrick or tower

The employee was last seen on top of the tower and determined to be missing. The employee was found in a pipe traveling from the cyclone discharge box to the thickener tank. Investigation has revealed that the employee traveled outside the provided safe access to the cyclone discharge box. It is not yet determined how the employee entered the pipe.

December 15, 2015 IA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman Fatality · MACHINERY
Continental Cement Company, LLC · Struck by... (Not Elsewhere Classified)

Sub-contracted tow truck was dispatched to tow super sucker truck. Boom of tow truck was being operated by tow truck employee #1 when it struck tow truck employee #2 in the head. Employee #2 was taken by ambulance to local ER for treatment where he later passed away. Most data unknown due to HIPPA and subcontractor status of deceased

September 16, 2013 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver Fatality · POWERED HAULAGE
Con-Agg Companies, LLC · Struck against a moving object

On Monday 9/16/13 at 09:25a.m. a pit/haul truck driver, in truck number 22-2012, with 25 years, 42 weeks experience turned left and crashed through the protection berm and fell 80 feet to the pit floor

May 23, 2006 KY · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator Fatality · POWERED HAULAGE
Hinkle Contracting Company LLC · Caught in, under or between a moving and a stationary object

WHILE PERFORMING MAINTENANCE ON CONVEYOR BELT EMPLOYEE WAS PINNED BETWEEN WA500 KOMATSU LOADER AND CONVEYOR BELT LINE RESULTING IN HIS DEATH.

January 27, 2000 TN · Metal/Non-Metal drill helper Fatality · MACHINERY
Hinkle Contracting Company LLC · Struck against a moving object

WHEN POSITIONING THE DRILL, THE RIGHT REAR LEVELING FOOT SANK INTO A MUD SEAM ALLOWING THE DRILL TO OVERTURN. THE DRILL SLID OVER THE EDGE OF HIGHWALL AND THE ROCK LEDGE CRUSHED THE DRILL OPER ATORS COMPARTMENT CAUSING DEATH OF DRILL OPERATOR.

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The full compliance file on Summit Materials LLC

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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