Mining Incidents

Spencer Material Metal/Non-Metal

Tucson, Pima County, AZ  ·  Intermittent
MSHA Mine ID: 0203460

Spencer Material has $2K 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
0
Years on record
Latest incident
Compliance record
MSHA citations since 2024
10
citations
2
significant & substantial
$1,728
proposed penalties
$1,728
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2023
5
inspections on record
33
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: 33 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Spencer Material has $2K 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.
$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
10 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-11-19.
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 2,515 0 0 0.0
2025 Q3 5,503 0 0 0.0
2025 Q2 4,327 0 0 0.0
2025 Q1 3,085 0 0 0.0
2024 Q4 2,307 4 1 1733.9
2024 Q3 4,102 0 0 0.0
2024 Q2 1,588 0 0 0.0
2024 Q1 2,371 6 1 2530.6
Show 5 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 2,034 0 0 0.0
2023 Q3 2,243 0 0 0.0
2023 Q2 242 0 0 0.0
2023 Q1 1,694 0 0 0.0
2022 Q4 353 0 0 0.0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.

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The full compliance file on Spencer Material

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.