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Coolidge Plant 65: 28 MSHA citations Metal/Non-Metal

Coolidge, Pinal County, AZ  ·  Active
MSHA Mine ID: 0203173

Coolidge Plant 65 has $9K 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
1
Years on record
2020
Latest incident
Mar 2020
Compliance record
MSHA citations since 2007
28
citations
4
significant & substantial
$9,198
proposed penalties
$8,092
paid to date
88% of proposed penalties paid to date, a $1,106 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Arizona, LLC's full MSHA compliance history →
Inspection activity
MSHA inspections since 2007
25
inspections on record
305
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: 305 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Coolidge Plant 65 has $9K 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.
$9K
proposed penalties
$8K
current assessed
$8K
paid to date
$0
outstanding
28 assessments are final orders; 2 contested dockets.
Of $2K in penalties contested before the Commission, $960 was upheld in final decisions.
As of the most recent assessment on 2024-10-01.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘ Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
14.3%
significant & substantial
7.1%
high negligence or reckless
17.9%
reasonably likely or greater
46.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 14.3% low, 78.6% moderate, 7.1% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘ Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
5 citations taken to the federal commission · 18% of citations on record
  • Settled 2 · 40%
  • Vacated or withdrawn 3 · 60%
67%
S&S designation survived the contest
ⓘ Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 3 decided S&S contests · industry: 79%
60%
Penalty reduction in decided contests
$2K proposed, $960 after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2011-09-09.
Contested penalties
ⓘ A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
WEST 2011-1464M Settlement Lesnick 2012 $2K → $960
WEST 2010-706M Withdrawal Lesnick 2010 $362 → $0
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Health sampling
ⓘ A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
ⓘ Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2024-10-02
0%
of limit-tested samples over the exposure limit
14
samples
1
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg11
  • Quartz, respirable, >1% Qtz2
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (14)
Date Contaminant Concentration Limit Conc / limit Occupation
2024-10-02 Respirable dust, <.1mg 0 Screen/Scalper Operator
2024-10-02 Respirable dust, <.1mg 0 Crusher Oper/Worker
2024-10-02 Respirable dust, <.1mg 0 Front-end Loader Operator
2022-09-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-12-14 Quartz, respirable, >1% Qtz 0.13 Cleanup Man
2021-12-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-12-14 Quartz, respirable, >1% Qtz 0.2 0.56 0.36 Front-end Loader Operator
2020-03-19 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-03-19 Respirable dust, <.1mg 0 Mechanic
2020-03-19 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-03-19 Respirable dust, <.1mg 0 Complete Load-Haul-Dump
2020-03-19 Unlisted Particulate, respirable, <1% Qtz 0.52 Front-end Loader Operator
2009-11-24 Respirable dust, <.1mg 0 Utility Man
2009-11-24 Respirable dust, <.1mg 0 Front-end Loader Operator
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.

Coolidge Plant 65 recorded 0.00 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
ⓘ This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
Below average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Arizona, metal and nonmetal mining averaged 1.81 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2025 * 0.00 0.00 0.000
2024 * 0.00 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. Hanson Aggregates Arizona, Inc 2007 to 2010
  2. Hanson Aggregates LLC 2010 to 2022
  3. Martin Marietta Materials, Inc 2022 to 2022
  4. Martin Marietta Arizona, LLC 2022 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 14
2025 13
2024 14
2023 14
2022 12
2021 8
2020 6
2019 4
2012 1
2011 0
2010 2
2009 2
2008 5
2007 2
Source: MSHA quarterly employment and production, updated weekly.

Coolidge Plant 65 sits in Pinal County, Arizona, where the Census mining category is 0.8% of county employment.

Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Pinal County, Arizona · Population 449,219
0.8%
Mining share of county employment
$77,588
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
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
2026 Q2 8,038 0 0 0.0
2026 Q1 7,891 0 0 0.0
2025 Q4 6,967 0 0 0.0
2025 Q3 6,514 0 0 0.0
2025 Q2 7,943 0 0 0.0
2025 Q1 7,136 0 0 0.0
2024 Q4 8,090 2 0 247.2
2024 Q3 8,318 0 0 0.0
Show 41 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 8,468 0 0 0.0
2024 Q1 7,628 0 0 0.0
2023 Q4 7,882 0 0 0.0
2023 Q3 8,405 0 0 0.0
2023 Q2 9,175 1 0 109.0
2023 Q1 7,625 0 0 0.0
2022 Q4 7,712 2 0 259.3
2022 Q3 8,341 0 0 0.0
2022 Q2 5,154 0 0 0.0
2022 Q1 6,244 0 0 0.0
2021 Q4 5,145 0 0 0.0
2021 Q3 5,358 0 0 0.0
2021 Q2 5,222 0 0 0.0
2021 Q1 4,112 0 0 0.0
2020 Q4 4,133 1 0 242.0
2020 Q3 4,109 0 0 0.0
2020 Q2 3,464 0 0 0.0
2020 Q1 3,847 1 0 259.9
2019 Q4 3,677 0 0 0.0
2019 Q3 4,237 0 0 0.0
2019 Q2 1,617 0 0 0.0
2012 Q1 518 0 0 0.0
2011 Q4 0 0 0
2011 Q3 0 0 0
2011 Q2 0 2 2
2011 Q1 0 0 0
2010 Q4 929 0 0 0.0
2010 Q3 812 0 0 0.0
2010 Q2 1,071 0 0 0.0
2010 Q1 1,030 0 0 0.0
2009 Q4 921 2 0 2171.6
2009 Q3 1,241 0 0 0.0
2009 Q2 1,146 0 0 0.0
2009 Q1 1,875 0 0 0.0
2008 Q4 1,920 0 0 0.0
2008 Q3 3,329 2 0 600.8
2008 Q2 3,890 0 0 0.0
2008 Q1 1,491 6 0 4024.1
2007 Q4 1,608 0 0 0.0
2007 Q3 1,187 0 0 0.0
2007 Q2 685 6 0 8759.1
No fatalities recorded at this mine.

Reportable incidents

1 on file

2020 · 1 incident

March 4, 2020 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates LLC · Over-exertion in lifting objects

Clear sunny sky on dry level ground replacing conveyor belt roller assembly at chest height with assistance.