Principio Quarry has $7K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
6
Years on record
2022–2026
Latest incident
Jun 2026
Compliance record
MSHA citations since 2022
34
citations
10
significant & substantial
$6,622
proposed penalties
$6,622
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2022
12
inspections on record
272
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: 272 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Principio Quarry has $7K in proposed MSHA penalties and $0 outstanding across 2 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.
$7K
proposed penalties
$7K
current assessed
$7K
paid to date
$0
outstanding
33 assessments are final orders; 2 contested dockets.
As of the most recent assessment on 2025-11-20.
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
15,196
2
0
131.6
2025 Q3
13,404
0
0
0.0
2025 Q2
16,632
2
0
120.3
2025 Q1
12,528
0
0
0.0
2024 Q4
19,373
3
1
154.9
2024 Q3
17,506
0
0
0.0
2024 Q2
18,307
1
0
54.6
2024 Q1
13,703
0
0
0.0
Show 10 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2023 Q4
15,893
3
1
188.8
2023 Q3
15,975
0
0
0.0
2023 Q2
16,911
5
2
295.7
2023 Q1
14,920
0
0
0.0
2022 Q4
14,897
10
2
671.3
2022 Q3
12,206
3
0
245.8
2022 Q2
8,210
0
0
0.0
2022 Q1
2,435
4
3
1642.7
2021 Q4
6,837
0
0
0.0
2021 Q3
6,290
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
6 on file
2026 · 2 incidents
June 2, 2026MD · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techPOWERED HAULAGE
Employee was attempting to track the return side of the conveyor belt by striking the frame of the roller with a hammer to move it backwards. EE missed and EE's hand got caught between the conveyor belt and roller.
Employee was tightening a bolt on Crusher 2 (CR2) with a torque wrench and torque multiplier. After tightening bolt, the torque multiplier came loose and dropped. Employee reacted by attempting to catch the multiplier. The multiplier jammed employee's left hand.
2023 · 2 incidents
September 25, 2023MD · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
Employee got finger pinched between aerial lift basket and a wall fracturing the left middle finger tip.
For insurers, brokers, and safety consultants
The full compliance file on Principio Quarry
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.