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: 723 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
D41 has $28K in proposed MSHA penalties and $0 outstanding across 3 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.
$28K
proposed penalties
$28K
current assessed
$28K
paid to date
$0
outstanding
119 assessments are final orders; 3 contested dockets.
Of $6K in penalties contested before the Commission, $6K was upheld in final decisions.
As of the most recent assessment on 2026-03-02.
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.
6citations taken to the federal commission · 5% of citations on record
Settled
1 · 17%
Stood as issued
5 · 83%
100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 6 decided S&S contests · industry: 79%
0%
Penalty reduction in decided contests
$6K proposed, $6K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2019-04-15.
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: 2026-05-21
0%
of limit-tested samples over the exposure limit
15
samples
3
limit-tested
Most sampled contaminants
Respirable dust, <.1mg10
Quartz, respirable, >1% Qtz4
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (15)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-05-21
Quartz, respirable, >1% Qtz
0.13
Mechanic
2026-05-21
Respirable dust, <.1mg
0
Crusher Oper/Worker
2026-05-21
Respirable dust, <.1mg
0
Supervisor, Co. Official
2023-11-08
Quartz, respirable, >1% Qtz
0.26
1.25
0.21
Front-end Loader Operator
2023-11-08
Respirable dust, <.1mg
0
Truck Loader
2023-11-08
Quartz, respirable, >1% Qtz
0.32
1.28
0.25
Hydrating Plant Operator
2023-11-08
Quartz, respirable, >1% Qtz
0.35
1.16
0.30
Crusher Oper/Worker
2018-08-23
Respirable dust, <.1mg
0
Truck Driver
2018-08-23
Unlisted Particulate, respirable, <1% Qtz
0.16
Crusher Oper/Worker
2018-08-23
Respirable dust, <.1mg
0
Washer Operator
2013-12-04
Respirable dust, <.1mg
0
Washer Operator
2013-12-04
Respirable dust, <.1mg
0
Truck Driver
2009-09-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-09-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-09-15
Respirable dust, <.1mg
0
Truck Driver
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.
D41 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 *
0.00
0.00
0.000
2023 *
7.67
3.84
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
4.64
4.64
0.000
2019 *
4.64
4.64
0.000
2018 *
5.63
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
14
2025
13
2024
19
2023
21
2022
20
2021
16
2020
15
2019
15
2018
13
2017
11
2016
12
2015
11
2014
12
2013
11
2012
10
2011
9
2010
11
2009
12
2008
13
2007
10
Source: MSHA quarterly employment and production, updated weekly.
D41 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
10,489
0
0
0.0
2026 Q1
10,766
5
1
464.4
2025 Q4
10,867
0
0
0.0
2025 Q3
8,057
0
0
0.0
2025 Q2
8,122
1
0
123.1
2025 Q1
7,863
0
0
0.0
2024 Q4
12,179
4
0
328.4
2024 Q3
13,064
0
0
0.0
Show 68 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
12,807
0
0
0.0
2024 Q1
11,599
0
0
0.0
2023 Q4
13,236
0
0
0.0
2023 Q3
14,112
8
0
566.9
2023 Q2
13,496
0
0
0.0
2023 Q1
11,297
1
0
88.5
2022 Q4
11,613
0
0
0.0
2022 Q3
12,359
1
0
80.9
2022 Q2
12,404
0
0
0.0
2022 Q1
11,969
4
1
334.2
2021 Q4
10,041
0
0
0.0
2021 Q3
9,357
0
0
0.0
2021 Q2
12,978
2
1
154.1
2021 Q1
10,377
0
0
0.0
2020 Q4
9,494
1
0
105.3
2020 Q3
10,868
7
0
644.1
2020 Q2
11,806
0
0
0.0
2020 Q1
10,954
3
0
273.9
2019 Q4
12,305
0
0
0.0
2019 Q3
11,479
0
0
0.0
2019 Q2
9,524
7
2
735.0
2019 Q1
9,831
10
3
1017.2
2018 Q4
6,540
0
0
0.0
2018 Q3
10,948
16
5
1461.5
2018 Q2
9,560
0
0
0.0
2018 Q1
8,489
2
0
235.6
2017 Q4
8,472
0
0
0.0
2017 Q3
7,191
0
0
0.0
2017 Q2
8,337
0
0
0.0
2017 Q1
7,711
0
0
0.0
2016 Q4
7,297
2
2
274.1
2016 Q3
7,246
1
0
138.0
2016 Q2
8,401
0
0
0.0
2016 Q1
9,261
4
1
431.9
2015 Q4
7,610
0
0
0.0
2015 Q3
4,846
2
1
412.7
2015 Q2
7,264
0
0
0.0
2015 Q1
6,724
0
0
0.0
2014 Q4
6,475
0
0
0.0
2014 Q3
6,958
2
0
287.4
2014 Q2
7,790
0
0
0.0
2014 Q1
7,417
0
0
0.0
2013 Q4
6,986
3
1
429.4
2013 Q3
6,962
0
0
0.0
2013 Q2
6,241
1
1
160.2
2013 Q1
4,919
0
0
0.0
2012 Q4
5,466
1
0
182.9
2012 Q3
6,104
1
0
163.8
2012 Q2
5,787
0
0
0.0
2012 Q1
5,586
0
0
0.0
2011 Q4
5,226
2
0
382.7
2011 Q3
5,347
1
0
187.0
2011 Q2
5,854
0
0
0.0
2011 Q1
5,122
0
0
0.0
2010 Q4
5,723
4
1
698.9
2010 Q3
6,490
0
0
0.0
2010 Q2
6,468
1
0
154.6
2010 Q1
4,428
7
3
1580.8
2009 Q4
4,938
0
0
0.0
2009 Q3
4,339
5
1
1152.3
2009 Q2
6,442
0
0
0.0
2009 Q1
5,883
0
0
0.0
2008 Q4
6,898
0
0
0.0
2008 Q3
6,558
0
0
0.0
2008 Q2
6,612
0
0
0.0
2008 Q1
6,400
1
0
156.2
2007 Q4
6,367
0
0
0.0
2007 Q3
5,485
8
3
1458.5
No fatalities recorded at this mine.
Reportable incidents
6 on file
2024 · 1 incident
May 6, 2024AZ · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerOTHER
On 5/6/2024 at approximately 10:30 AM EE was in the shop when EE informed the plant foreman that EE wasn't feeling well. EE stated that EE felt a little dizzy and that EE's left arm was numb. EE was immediately transported to the hospital.
2023 · 2 incidents
December 18, 2023AZ · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
Employee was exiting the crusher control room and as EE proceeded to come down the stairs EE's right foot slipped causing EE fall. When employee fell EE's left foot got twisted and ended up underneath EE causing the ankle to break in three different places.
Water pull operator pulled to the side of the road to let semi trucks pass, the shoulder was soft due to recent rains and could not hold the weight of the machine. The shoulder gave way causing the water pull to roll over.
2019 · 1 incident
July 17, 2019AZ · Metal/Non-Metalbeltman, conveyor man, conveyor belt worker, mobile bridge carrierman, feeder operator, conveyor riderHANDLING OF MATERIALS
Employee got finger smashed between take up bolt & take up bearing while loosening tail pulley for repairs on the conveyor. Employee smashed left index finger.
2018 · 1 incident
January 25, 2018AZ · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerSLIP OR FALL OF PERSON
1/25/18 employee was walking along the belt line at the crusher and rolled their left ankle. Employee was sent to Concentra to get evaluated. Employee was diagnosed with a muscle strain on the left ankle. Employee was given a prescription and put on light duty. Employee was released to full - regular duty on 2/14/18.