Mining Incidents

CalMat Co operator

Controlled by Vulcan Materials Company
MSHA operator ID: L16645
Fatalities
3
Total incidents
558
Mines on record
45
Years on record
1999–2026
Compliance record
MSHA citations since 2000
1,808
citations
299
significant & substantial
$572,845
proposed penalties
$480,455
paid to date
84% of proposed penalties paid to date, a $92,390 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
1,679
inspections on record
31,051
inspection hours
5.8
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.
1,808 citations across 31,051 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.
$573K
proposed penalties
$481K
current assessed
$480K
paid to date
$453
outstanding
1,775 assessments are final orders; 49 contested dockets.
As of the most recent assessment on 2026-04-23.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.

Top causes

Incident timeline

2026
3
2025
5
2024
11
2023
11 (1f)
2022
12
2021
12
2020
9
2019
18
2018
12
2017
19
2016
10
2015
9
2014
13
2013
4
2012
5
2011
10
2010
11
2009
14
2008
28
2007
29
2006
27
2005
32
2004
24
2003
31 (1f)
2002
40
2001
43 (1f)
2000
49
1999
67

Mines on record

Fatalities under this operator

3 recorded
June 22, 2023 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer Fatality · MACHINERY
CalMat Co · Struck against a moving object

Machine operator was operating a CAT D9T dozer clearing overburden material from a bench. Operator reversed the machine backwards an estimated 200-300 ft. at a high speed without looking back and without responding to honking from another machine, per witness testimony. Machine fell off an edge. Operator was pronounced dead at the scene. Machine is total loss.

June 14, 2003 CA · Metal/Non-Metal mine manager, mine foreman, mine owner Fatality · MACHINERY
CalMat Co · Struck by falling object

THE VICTIM WAS POSITIONING THE WEDGE BAR AND BOLT ASSEMBLY TO SECURE THE UPPER PLATE IN A STATIONARY JAW CRUSHER. APPARENTLY THE LINER SHIFTED AND FELL, STRIKING THE VICTIM.

November 9, 2001 CA · Metal/Non-Metal beltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor rider Fatality · OTHER
CalMat Co · Drowning

EMPLOYEE WAS USING A HIGH PRESSURE WATER HOSE TO WASH OUT ACCUMULATED MATERIAL BELOW CONVEYER #11 (FLOATING) AND TAILPULLEY CONVEYER #4 (LAND)APPARENTLY FELL IN WATER PIT WHILE NOT WEARING A LIFE JACKET.

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The full compliance file on CalMat Co

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.