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: 449 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
1016 Peoria has $18K in proposed MSHA penalties and $443 outstanding across 7 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.
$18K
proposed penalties
$18K
current assessed
$18K
paid to date
$443
outstanding
53 assessments are final orders; 7 contested dockets.
Of $4K in penalties contested before the Commission, $3K was upheld in final decisions.
As of the most recent assessment on 2026-02-26.
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.
19citations taken to the federal commission · 36% of citations on record
Settled
8 · 42%
Stood as issued
6 · 32%
Vacated or withdrawn
5 · 26%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 9 decided S&S contests · industry: 79%
20%
Penalty reduction in decided contests
$4K proposed, $3K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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: 2025-09-24
0%
of limit-tested samples over the exposure limit
6
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg4
Quartz, respirable, >1% Qtz1
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (6)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-09-24
Respirable dust, <.1mg
0
Crusher Oper/Worker
2025-09-24
Respirable dust, <.1mg
0
Front-end Loader Operator
2025-09-24
Respirable dust, <.1mg
0
Utility Man
2017-05-18
Unlisted Particulate, respirable, <1% Qtz
0.16
Welder, etc.
2017-05-18
Respirable dust, <.1mg
0
Truck Driver
2017-05-18
Quartz, respirable, >1% Qtz
0.21
0.9
0.23
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.
1016 Peoria 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 *
17.00
11.34
0.000
2023 *
5.41
5.41
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
10.67
10.67
0.000
2019 *
5.94
0.00
0.000
2018 *
17.24
17.24
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
11
2025
11
2024
18
2023
23
2022
16
2021
16
2020
18
2019
15
2018
11
2017
12
2016
8
2015
3
Source: MSHA quarterly employment and production, updated weekly.
1016 Peoria sits in Maricopa County, Arizona, where the Census mining category is 0.2% 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.
Maricopa County, Arizona · Population 4,491,987
0.2%
Mining share of county employment
$85,518
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
5,433
0
0
0.0
2026 Q1
6,182
6
3
970.6
2025 Q4
6,657
0
0
0.0
2025 Q3
8,785
2
1
227.7
2025 Q2
8,431
0
0
0.0
2025 Q1
8,180
8
4
978.0
2024 Q4
8,087
0
0
0.0
2024 Q3
8,769
3
0
342.1
Show 36 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
8,769
0
0
0.0
2024 Q1
9,659
1
0
103.5
2023 Q4
10,465
0
0
0.0
2023 Q3
9,486
2
1
210.8
2023 Q2
8,926
0
0
0.0
2023 Q1
8,075
2
0
247.7
2022 Q4
6,382
0
0
0.0
2022 Q3
7,043
0
0
0.0
2022 Q2
8,601
0
0
0.0
2022 Q1
8,988
0
0
0.0
2021 Q4
8,954
0
0
0.0
2021 Q3
7,820
0
0
0.0
2021 Q2
8,726
0
0
0.0
2021 Q1
8,484
6
5
707.2
2020 Q4
8,337
0
0
0.0
2020 Q3
8,555
0
0
0.0
2020 Q2
9,979
1
0
100.2
2020 Q1
10,604
0
0
0.0
2019 Q4
10,807
0
0
0.0
2019 Q3
8,647
0
0
0.0
2019 Q2
7,880
0
0
0.0
2019 Q1
6,311
1
1
158.5
2018 Q4
4,983
0
0
0.0
2018 Q3
5,708
0
0
0.0
2018 Q2
6,531
1
0
153.1
2018 Q1
5,980
0
0
0.0
2017 Q4
6,280
3
2
477.7
2017 Q3
6,310
0
0
0.0
2017 Q2
6,262
5
2
798.5
2017 Q1
5,785
3
0
518.6
2016 Q4
5,315
0
0
0.0
2016 Q3
4,451
2
0
449.3
2016 Q2
3,401
0
0
0.0
2016 Q1
2,084
0
0
0.0
2015 Q4
2,336
0
0
0.0
2015 Q3
0
0
0
No fatalities recorded at this mine.
Reportable incidents
13 on file
2024 · 3 incidents
July 3, 2024AZ · Metal/Non-Metaldry screening plant operator, screen house operatorPOWERED HAULAGE
On 7-3-24, employee woke up with a sore back. During the shift, they operated a 980m Front End loader. About halfway through the shift, they got off the loader to work on the wash plant. They got back in the loader and around 10:00 a.m., they informed the Plant Manager of a minor pain in their back.
The employee was airing up/checking the pressures of the tires of the water truck. After checking the pressure of one of the tires, the employee went to grab the air chuck to add air to the tire. As EE approached, the tire blew out. The employee was about 4 feet away from the tire, but the air pressure blew EE's safety glasses against EE's eyes and debris into EE's eyes.
February 26, 2024AZ · Metal/Non-Metalmine manager, mine foreman, mine ownerMACHINERY
On 2-26-24 EE was using a MAG drill to drill holes on the inside frame of a stacker. In operation EE attempted to clean the metal that was stuck to the drill bit. The drill bit caught EE's glove entangling EE's hand into the drill bit. An employee that was assisting hit the emergency stop on the drill. The entanglement resulted in a laceration to right hand.
EE was on top of a conveyor hooking up chains to the lifting eyes to lift the conveyor with the 988k Loader. EE signaled to the loader to put pressure on the chains and then unhooked the fall protection to be able to climb down. The chains that were attached then slipped causing the employee to fall off the side of the conveyor 10 feet to the ground.
2020 · 2 incidents
July 14, 2020AZ · Metal/Non-Metalwasher operator, sizing operatorPOWERED HAULAGE
The employee was walking to the port-a-john when plastic (trash) wrapped around their leg and tripped them. They hit the gravel causing cuts to their hand and forehead. No lost time, but sought treatment on 5-20-19.
2018 · 2 incidents
November 12, 2018AZ · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
The injured employee and another employee were moving a large piece of plate steel. The injured employee dropped their end and the plate steel struck their leg and landed on their foot.
April 18, 2018AZ · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerSLIP OR FALL OF PERSON
The employee had just gotten finished changing screens on the JCI screen. As ee was rushing to get back to the MCC to get the plant started back up, ee missed the second from the top step and fell approximately 10' to the ground, landing on left foot. The employee complained of pain in ankle. No fracture or deformity observed. Became a loss work injury on 4/19/2018.
The employee was moving a metal beam from one area to another. There were lifting chains on the ground nearby that the employee didn't see. While carrying the beam, the employee stepped on the chains, the chains and the employees foot slid out from under EE, and EE's knee twisted. Employee referred to doctor for evaluation.
The miner was walking from EE's welding truck to the parts room when EE's foot slid in mud on concrete. When EE's foot slid, EE's knee twisted. The miner continued to work until 7/24/2017, when EE was sent to the doctor. EE received PT and medication. Injury became reportable on 7/24/2017.
July 14, 2017AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorMACHINERY
The miner was assisting a welder with fabrication activities when slag entered glove cuff and burned three fingers. The miner declined treatment at the time. The following Monday (7-17-2017), the miner complained of pain and swelling and was sent to an urgent care for treatment. Did not become a lost time accident until 7-18-2017.
January 20, 2017AZ · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerHANDLING OF MATERIALS
The employee was doing excessive shoveling the previous Wednesday, woke up Thursday with back a little sore, worked Thursday, woke up Friday with intense back pain, but still came to work. Injury reported 1/20/2017 and became a lost time accident 1/23/2017.
Related mines
Other mines operated by Arcosa Aggregates West, LLC.