Pinyon Plain Mine has $20K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
12
Years on record
2013–2026
Latest incident
May 2026
Compliance record
MSHA citations since 2013
114
citations
18
significant & substantial
$20,036
proposed penalties
$20,036
paid to date
100% of proposed penalties paid to date, a $0 gap.
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.
114 citations across 2,133 inspection hours.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2016-05-10.
On record since 2016.
Source: MSHA imminent-danger order records, updated weekly.
Pinyon Plain Mine has $20K in proposed MSHA penalties and $0 outstanding across 0 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.
$20K
proposed penalties
$20K
current assessed
$20K
paid to date
$0
outstanding
104 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-16.
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.
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: 2025-11-20
44%
of limit-tested samples over the exposure limit
13
samples
9
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz72 over
Diesel particulate (total carbon)32 over
Respirable dust, <.1mg3
Show the individual readings (22)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-08-21
Quartz, respirable, >1% Qtz
1.03
0.99
1.04
Mucking Mach. Operator
2025-08-21
Quartz, respirable, >1% Qtz
0.52
0.48
1.08
Mucking Mach. Operator
2025-08-20
TC from EC @ 160
176
160
1.10
Mucking Mach. Operator
2025-08-20
TC @ 160
236
160
1.48
Mucking Mach. Operator
2025-08-20
TC @ 160
176
160
1.10
Miner, Drift
2025-11-20
Respirable dust, <.1mg
0
Utility Man
2025-11-20
Quartz, respirable, >1% Qtz
0.25
0.97
0.26
Scoop-Tram Operator
2025-11-20
Quartz, respirable, >1% Qtz
0.13
Mechanic
2025-11-20
Respirable dust, <.1mg
0
Blaster, Powder Gang
2025-08-21
Quartz, respirable, >1% Qtz
0.14
0.6
0.23
Utility Man
2025-08-20
EC @ 160
144
160
0.90
Mucking Mach. Operator
2025-08-20
TC from EC @ 160
0
160
0.00
Miner, Drift
2025-08-20
EC @ 160
118
160
0.74
Miner, Drift
2025-08-20
ORGANIC CARBON
58
Miner, Drift
2025-08-20
ORGANIC CARBON
93
Mucking Mach. Operator
2025-08-20
TC from EC @ 160
0
160
0.00
Mechanic
2025-08-20
EC @ 160
0
160
0.00
Mechanic
2025-08-20
TC @ 160
0
160
0.00
Mechanic
2025-08-20
ORGANIC CARBON
0
Mechanic
2021-08-05
Respirable dust, <.1mg
0
Electrician
2013-05-22
Quartz, respirable, >1% Qtz
0.53
2.78
0.19
Skip Dumper, Toploader, Tipple Operator
2013-05-22
Quartz, respirable, >1% Qtz
0.29
0.88
0.33
Laborer, Bullgang
Area samples (mill and shop air)
Last sampled: 2025-08-20
1
samples
Show the individual readings (2)
Date
Contaminant
Concentration
Limit
Conc / limit
Area sampled
2025-08-20
EC @ 160
161
UG ACTIVE MINING
2025-08-20
TC @ 160
197
UG ACTIVE MINING
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.
Pinyon Plain Mine recorded 2.75 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.
2.75
total case rate
0.00
days-away rate
0.000
fatality rate
Above 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 *
2.75
0.00
0.000
2024 *
2.86
0.00
0.000
2023 *
10.37
5.18
0.000
2017 *
5.13
0.00
0.000
2016 *
2.15
0.00
0.000
2015 *
0.00
0.00
0.000
2013 *
4.94
4.94
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
35
2025
35
2024
34
2023
28
2022
10
2021
6
2020
4
2019
4
2018
7
2017
19
2016
46
2015
18
2014
3
2013
24
2012
14
Source: MSHA quarterly employment and production, updated weekly.
Pinyon Plain Mine sits in Coconino 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.
Coconino County, Arizona · Population 144,643
0.2%
Mining share of county employment
$69,748
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
on 5/15/2026 miner was struck by loose rock from the back while kneeling to load lifters on the sill. Miner refused medical evaluation and completed shift and rotation. On 6/2/2026 miner stated EE had ache in right side pelvis area and was taken for medical evaluation and was placed on restriction for a contusion to the pelvis.
2025 · 1 incident
March 2, 2025AZ · Metal/Non-Metalminer, necMACHINERY
Miner was aligning steel frame for air door installation. Miner asked for a spud wrench to align the top and bottom steel frames. During this time the steel shifted and the tip on the Miners left index finger was pinched in the hole resulting in a crushing injury with lacerations.
2023 · 3 incidents
October 26, 2023AZ · Metal/Non-Metalminer, necMACHINERY
While training a miner using a jackleg with a 4' steel to drill a bolt hole in the back, EE was advised to reposition the leg. While repositioning the leg, the miner gave the cob too much pressure losing control of the drill. The drill fell backward towards the trainer hitting EE in the face splitting EE's lip. *The miner received 3 stitches by the medical facility's doctor.
Miner was installing a bearing set beam in the shaft at the 1-5 level, miner was using a spud wrench to align the beam when the wrench slipped out of the beam and caught a fingertip between the beam and wrench.
While hoist was being inspected and ran thru its pre shift checks it had a brake failure and lost the sinking bucket 100 to 150 feet down the shaft with the hoisting cable.
February 6, 2017AZ · Metal/Non-Metalminer, necMACHINERY
While drilling a face round with a jack leg drill, miner drilled into a vertical exploration hole from the surface, the hole was full of water and the pressure of 1300' of water forced the drill back into the miner chipping tooth.
Miner was unloading materials onto work deck in shaft from conveyance. Two beams were lying on the deck, miner was straddling the beams. When EE unhooked the rigging, the beams tipped and hit the miners foot.
While setting steel, a 10' piece of 3/8" angle iron fell three feet vertically onto the miners right foot. The steel punctured the miners right boot and also the skin on his foot. His status is Full Restriction, stay off feet and keep foot elevated. Possible small fracture and infection.