Mining Incidents

CalPortland operator

Controlled by Taiheiyo Cement Corp
MSHA operator ID: L11900
Fatalities
2
Total incidents
1002
Mines on record
28
Years on record
1990–2026
Compliance record
MSHA citations since 2000
3,521
citations
753
significant & substantial
$1,848,570
proposed penalties
$1,769,674
paid to date
96% of proposed penalties paid to date, a $78,896 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
1,291
inspections on record
34,766
inspection hours
10.1
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.
3,521 citations across 34,766 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.
$1.8M
proposed penalties
$1.8M
current assessed
$1.8M
paid to date
$322
outstanding
3,470 assessments are final orders; 31 contested dockets.
As of the most recent assessment on 2026-04-22.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.

Top causes

Incident timeline

2026
14
2025
23
2024
23
2023
36 (1f)
2022
37
2021
25
2020
16
2019
28
2018
19
2017
24
2016
30
2015
29
2014
26
2013
17
2012
11
2011
19
2010
20
2009
24
2008
24
2007
27
2006
31
2005
21
2004
21
2003
25
2002
39 (1f)
2001
34
2000
37
1999
32
1998
39
1997
29
1996
29
1995
27
1994
26
1993
27
1992
31
1991
59
1990
21

Mines on record

Fatalities under this operator

2 recorded
January 17, 2023 CA · Metal/Non-Metal weighman, scale person Fatality · POWERED HAULAGE
Calportland · Struck against a moving object

EE was involved in a traffic accident on the road that leads to the plant. EE was extricated from the vehicle and transported to the hospital where EE later died.

September 23, 2002 AZ · Metal/Non-Metal miner, nec Fatality · SLIP OR FALL OF PERSON
CalPortland Company · Fall from scaffolds, walkways, platforms

THE WAS ASKED TO REMOVE SCREWS FROM A METAL ROOF DECK ON THE EAVE OF A ROOF. FOR REASONS UNKNOWN, THE MINER REMOVED HIMSELF FROM THE ELEVATED WORK PLATFORM (JLG AND GOT ON THE ROOF. HE ALSO VI OLATED COMPANYPOLICY IN PROCEEDING TO WORK IN AREAS OF THE ROOF WHILE NOT TIED-OFF. WHILE WORKING ON THE ROOF DECK, NOT IN FRONT OF THE JLG AND WHILE NOT TIED-OFF, HE FELL TO THE GROUND.

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The full compliance file on CalPortland

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.