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: 248 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
1015 Northern has $2K in proposed MSHA penalties and $117 outstanding across 4 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
$117
outstanding
15 assessments are final orders; 4 contested dockets.
Of $932 in penalties contested before the Commission, $700 was upheld in final decisions.
As of the most recent assessment on 2025-05-06.
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.
8citations taken to the federal commission · 53% of citations on record
Settled
5 · 63%
Stood as issued
1 · 13%
Vacated or withdrawn
2 · 25%
25%
Penalty reduction in decided contests
$932 proposed, $700 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2018-02-26.
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: 2025-05-07
25%
of limit-tested samples over the exposure limit
9
samples
4
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz41 over
Respirable dust, <.1mg5
Show the individual readings (9)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2024-04-17
Quartz, respirable, >1% Qtz
0.93
0.68
1.37
Crusher Oper/Worker
2025-05-07
Respirable dust, <.1mg
0
Truck Driver
2025-05-07
Respirable dust, <.1mg
0
Front-end Loader Operator
2025-05-07
Quartz, respirable, >1% Qtz
0.17
0.86
0.20
Crusher Oper/Worker
2024-06-18
Respirable dust, <.1mg
0
Truck Driver
2024-06-18
Respirable dust, <.1mg
0
Truck Driver
2024-04-17
Quartz, respirable, >1% Qtz
0.52
1.02
0.51
Truck Driver
2017-12-20
Quartz, respirable, >1% Qtz
0.12
0.93
0.13
Crusher Oper/Worker
2017-12-20
Respirable dust, <.1mg
0
Front-end Loader Operator
Area samples (mill and shop air)
Last sampled: 2014-04-16, 12 years ago
1
samples
Show the individual readings (1)
Date
Contaminant
Concentration
Limit
Conc / limit
Area sampled
2014-04-16
Respirable dust, <.1mg
0
MP CRUSHING
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.
1015 Northern 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.
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
4
2025
9
2024
14
2023
13
2022
10
2021
9
2020
9
2019
7
2018
5
2017
5
2016
5
2015
0
2014
3
2013
0
2012
0
Source: MSHA quarterly employment and production, updated weekly.
1015 Northern 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
1,642
0
0
0.0
2026 Q1
1,825
0
0
0.0
2025 Q4
4,371
0
0
0.0
2025 Q3
6,101
0
0
0.0
2025 Q2
5,374
1
0
186.1
2025 Q1
4,299
0
0
0.0
2024 Q4
4,062
1
0
246.2
2024 Q3
4,114
0
0
0.0
Show 48 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
4,815
1
1
207.7
2024 Q1
4,209
0
0
0.0
2023 Q4
3,422
0
0
0.0
2023 Q3
3,322
0
0
0.0
2023 Q2
3,917
0
0
0.0
2023 Q1
2,784
1
0
359.2
2022 Q4
3,419
0
0
0.0
2022 Q3
3,572
0
0
0.0
2022 Q2
3,760
0
0
0.0
2022 Q1
3,903
0
0
0.0
2021 Q4
3,864
0
0
0.0
2021 Q3
3,909
0
0
0.0
2021 Q2
4,309
0
0
0.0
2021 Q1
4,707
0
0
0.0
2020 Q4
3,911
0
0
0.0
2020 Q3
3,957
0
0
0.0
2020 Q2
4,235
3
1
708.4
2020 Q1
5,061
0
0
0.0
2019 Q4
4,121
0
0
0.0
2019 Q3
4,489
0
0
0.0
2019 Q2
4,363
0
0
0.0
2019 Q1
3,074
0
0
0.0
2018 Q4
1,963
0
0
0.0
2018 Q3
2,345
0
0
0.0
2018 Q2
1,934
0
0
0.0
2018 Q1
2,593
0
0
0.0
2017 Q4
2,658
4
0
1504.9
2017 Q3
2,266
0
0
0.0
2017 Q2
2,477
2
0
807.4
2017 Q1
2,665
0
0
0.0
2016 Q4
3,140
0
0
0.0
2016 Q3
2,042
1
0
489.7
2016 Q2
972
0
0
0.0
2016 Q1
1,049
0
0
0.0
2015 Q2
0
0
0
2015 Q1
0
0
0
2014 Q4
0
0
0
2014 Q3
0
0
0
2014 Q2
2,523
0
0
0.0
2014 Q1
2,776
0
0
0.0
2013 Q4
0
0
0
2013 Q3
0
0
0
2013 Q2
87
0
0
0.0
2013 Q1
0
0
0
2012 Q4
0
0
0
2012 Q3
0
0
0
2012 Q2
0
0
0
2012 Q1
0
0
0
No fatalities recorded at this mine.
Reportable incidents
5 on file
2022 · 1 incident
June 8, 2022AZ · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerDISORDERS (PHYSICAL AGENTS)
The employee was working at our Northern plant, running a crushing plant, when the supervisor noticed that EE began acting a little off. Thinking it was heat related, supervisor ushered EE to the scale house to sit in the air conditioning. EE was given water, which EE proceeded to vomit up. EE was then taken to the hospital for evaluation.
2019 · 3 incidents
August 5, 2019AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
The employee was assisting with cleaning up spilled anhydrous lime around the crushing and screening plant. During the course of this process, the anhydrous lime came into contact with the employee's wet skin, causing 1st degree burns. Lost time as of 8/6/2019.
July 31, 2019AZ · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
The employee was using a large bar to knock a large rock out of the cone crusher. The employee was putting a lot of force behind the bar, when the rock suddenly moved, pinching EE's finger between the bar and the side of the cone. Lost time as of 8/2.
July 29, 2019AZ · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerSLIP OR FALL OF PERSON
The employee was stepping up onto a platform and lost balance. When employee's leg came back down to stabilize self, employee was cut by a stray piece of metal. Lost time as of 8/2.
Related mines
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