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: 396 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
1013 Coolidge has $10K in proposed MSHA penalties and $125 outstanding across 12 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.
$10K
proposed penalties
$10K
current assessed
$9K
paid to date
$125
outstanding
48 assessments are final orders; 12 contested dockets.
Of $7K in penalties contested before the Commission, $5K was upheld in final decisions.
As of the most recent assessment on 2025-10-29.
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.
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.
31citations taken to the federal commission · 65% of citations on record
Settled
20 · 65%
Stood as issued
4 · 13%
Vacated or withdrawn
7 · 23%
64%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 14 decided S&S contests · industry: 79%
21%
Penalty reduction in decided contests
$7K proposed, $5K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2024-11-17.
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.
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: 2024-12-06
50%
of limit-tested samples over the exposure limit
8
samples
2
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz21 over
Respirable dust, <.1mg6
Show the individual readings (8)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2021-04-14
Quartz, respirable, >1% Qtz
1.74
0.38
4.58
Crusher Oper/Worker
2024-12-06
Respirable dust, <.1mg
0
Crusher Oper/Worker
2024-12-06
Quartz, respirable, >1% Qtz
0.34
0.45
0.76
Crusher Oper/Worker
2022-09-28
Respirable dust, <.1mg
0
Truck Driver
2021-06-09
Respirable dust, <.1mg
0
Crusher Oper/Worker
2021-04-14
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-02-08
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-02-08
Respirable dust, <.1mg
0
Crusher Oper/Worker
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.
1013 Coolidge 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
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 *
8.38
8.38
0.000
2022 *
9.54
9.54
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
6
2025
11
2024
11
2023
11
2022
18
2021
9
2020
7
2019
6
2018
10
2017
8
2016
7
2015
6
2014
4
Source: MSHA quarterly employment and production, updated weekly.
1013 Coolidge 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
2,786
0
0
0.0
2026 Q1
4,660
0
0
0.0
2025 Q4
5,768
5
3
866.9
2025 Q3
7,581
0
0
0.0
2025 Q2
6,376
3
0
470.5
2025 Q1
5,612
0
0
0.0
2024 Q4
7,212
1
0
138.7
2024 Q3
6,150
0
0
0.0
Show 41 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
5,061
4
1
790.4
2024 Q1
5,457
0
0
0.0
2023 Q4
2,456
0
0
0.0
2023 Q3
3,848
0
0
0.0
2023 Q2
3,589
1
0
278.6
2023 Q1
4,705
0
0
0.0
2022 Q4
4,553
8
6
1757.1
2022 Q3
4,414
0
0
0.0
2022 Q2
6,669
0
0
0.0
2022 Q1
5,330
2
0
375.2
2021 Q4
4,586
0
0
0.0
2021 Q3
2,801
0
0
0.0
2021 Q2
3,951
1
0
253.1
2021 Q1
3,441
0
0
0.0
2020 Q4
3,393
0
0
0.0
2020 Q3
3,352
1
1
298.3
2020 Q2
2,742
0
0
0.0
2020 Q1
3,008
0
0
0.0
2019 Q4
2,357
3
1
1272.8
2019 Q3
2,135
0
0
0.0
2019 Q2
2,229
0
0
0.0
2019 Q1
3,022
4
2
1323.6
2018 Q4
4,956
0
0
0.0
2018 Q3
5,374
2
0
372.2
2018 Q2
3,896
0
0
0.0
2018 Q1
3,863
0
0
0.0
2017 Q4
5,807
2
0
344.4
2017 Q3
5,224
0
0
0.0
2017 Q2
2,525
2
0
792.1
2017 Q1
2,835
2
0
705.5
2016 Q4
3,136
0
0
0.0
2016 Q3
4,192
2
1
477.1
2016 Q2
3,340
0
0
0.0
2016 Q1
3,007
4
0
1330.2
2015 Q4
2,715
0
0
0.0
2015 Q3
2,441
1
0
409.7
2015 Q2
2,556
0
0
0.0
2015 Q1
2,508
0
0
0.0
2014 Q4
2,676
0
0
0.0
2014 Q3
2,327
0
0
0.0
2014 Q2
0
0
0
No fatalities recorded at this mine.
Reportable incidents
10 on file
2024 · 1 incident
February 7, 2024AZ · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSLIP OR FALL OF PERSON
On 2-7-24 between 5 and 6 am. employee was checking the 57-rock stacker during routine monitoring of plant. EE noticed that belt #1 feeding the 57-rock stacker had stopped. EE started making way to the control panel to shut off belt to prevent overflow. On EE's way to the control panel to shut it off, EE stepped wrong hurting their left foot around the achilleas area.
2023 · 2 incidents
June 6, 2023AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorPOWERED HAULAGE
Employee was on EE's knees shoveling. When EE finished, EE put EE's hand down to help self up and contacted a sharp rock with EE's hand, resulting a cut that needed stitches.
2022 · 1 incident
June 27, 2022AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
The employee was assisting the crushing and screening plant operator with a screen change. As employee was lifting one of the screens to replace it, employee felt a "pull" in shoulder, causing pain.
2021 · 1 incident
March 18, 2021AZ · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerMACHINERY
The employee was shoveling by the chute of a sand and gravel screen when a rock bounced off the chute and hit the employee on the hard hat. The employee complained of neck pain and was seen at an urgent care. Loss of time as of 3/19/21.
2019 · 2 incidents
April 11, 2019AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
The injured employee and another employee were pulling wire and dismantling a crushing unit. While pulling wire, the employee felt a jolt of pain in shoulder.
January 8, 2019AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
Employee was removing rocks from the grizzly bars at the feeder with a sledge hammer. While doing this, the employee felt a pain in back. Injury reported 1/9/19 and lost time as of 1/10/19.
2018 · 1 incident
March 8, 2018AZ · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerNONPOWERED HAULAGE
The employee claims to have been shoveling 3/8 rock into a wheel barrow while cleaning up the plant. Upon lifting the wheel barrow full of 3/8 rock, the employee felt "tearing and pain" in the abdomen. The employee was later diagnosed with two hernias.
2017 · 1 incident
August 11, 2017AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorDISORDERS (PHYSICAL AGENTS)
Employee is a loader operator. When the air conditioning in the loader was unable to be repaired, the employee elected to run the loader (unbeknownst to Supervisor). Towards the end of the day, the employee complained of not feeling well, was seen in the emergency room and diagnosed with dehydration. Employee returned to work 8/14/17 (no lost time).
2016 · 1 incident
May 24, 2016AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
Employee was preparing to top off the radiator of a 980 loader. When the employee unlatched the hood, the latch crushed a rock and the debris flew into the employee's eyes.
Related mines
Other mines operated by Arcosa Aggregates West, LLC.