Diablo Plant # 136 has $12K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
3
Years on record
2015–2017
Latest incident
Apr 2017
Compliance record
MSHA citations since 2015
57
citations
10
significant & substantial
$11,988
proposed penalties
$11,988
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2015
31
inspections on record
495
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: 495 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Diablo Plant # 136 has $12K in proposed MSHA penalties and $0 outstanding across 0 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.
$12K
proposed penalties
$12K
current assessed
$12K
paid to date
$0
outstanding
57 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-03-17.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
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
5,990
0
0
0.0
2025 Q3
6,286
1
0
159.1
2025 Q2
7,527
0
0
0.0
2025 Q1
7,043
0
0
0.0
2024 Q4
6,963
0
0
0.0
2024 Q3
7,748
0
0
0.0
2024 Q2
9,128
0
0
0.0
2024 Q1
7,508
0
0
0.0
Show 36 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2023 Q4
8,203
0
0
0.0
2023 Q3
8,199
0
0
0.0
2023 Q2
7,081
1
1
141.2
2023 Q1
6,508
0
0
0.0
2022 Q4
5,963
4
0
670.8
2022 Q3
4,304
0
0
0.0
2022 Q2
6,452
0
0
0.0
2022 Q1
7,698
1
1
129.9
2021 Q4
4,162
0
0
0.0
2021 Q3
5,251
3
0
571.3
2021 Q2
5,392
0
0
0.0
2021 Q1
5,270
0
0
0.0
2020 Q4
5,210
4
0
767.8
2020 Q3
5,293
0
0
0.0
2020 Q2
5,360
0
0
0.0
2020 Q1
5,542
0
0
0.0
2019 Q4
5,373
4
0
744.5
2019 Q3
4,429
0
0
0.0
2019 Q2
4,779
0
0
0.0
2019 Q1
4,894
0
0
0.0
2018 Q4
3,609
2
0
554.2
2018 Q3
5,491
0
0
0.0
2018 Q2
4,931
3
0
608.4
2018 Q1
4,834
0
0
0.0
2017 Q4
4,792
5
0
1043.4
2017 Q3
4,988
0
0
0.0
2017 Q2
5,462
6
2
1098.5
2017 Q1
5,186
0
0
0.0
2016 Q4
5,193
9
3
1733.1
2016 Q3
4,926
0
0
0.0
2016 Q2
4,867
0
0
0.0
2016 Q1
4,197
0
0
0.0
2015 Q4
4,266
7
3
1640.9
2015 Q3
2,861
0
0
0.0
2015 Q2
2,791
0
0
0.0
2015 Q1
228
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
3 on file
2017 · 1 incident
April 7, 2017AZ · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
EE was moving a piece of plate steel to gain access to timber to place under load of new steel shipment. EE lifted the approximately 3' x 5' by 3/8 inch steel the long way and pushed over to the side 180 degrees. The steel plate hit an approximately 18" high steel beam and kicked back striking the EE's heel causing EE's heel bone to break in hairline fractures
2016 · 1 incident
November 18, 2016AZ · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
CalPortland Company · Caught in, under or between a moving and a stationary object
Employee used poor hand placement while getting off of VSI lid EE was repairing. Employee was also not wearing gloves during the time of injury. Poor hand placement on pivot point while getting off of equipment caused left pinky to get caught between VSI lid and attach point. The result was employee fracturing the tip of the right pinky finger.
CalPortland Company · Caught in, under or between a moving and a stationary object
Employee was removing a broken impeller from pump shaft. A cheater bar was connected to a wrench when the wrench slipped and the employee fell to the ground and his hand was caught between cheater bar and the concrete pad, fracturing the right ring finger.
For insurers, brokers, and safety consultants
The full compliance file on Diablo Plant # 136
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.