Tri County Materials Inc. has $77K in proposed MSHA penalties and $2K outstanding across 3 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
6
Years on record
1984–2022
Latest incident
Jan 2022
Compliance record
MSHA citations since 2002
179
citations
41
significant & substantial
$77,123
proposed penalties
$66,832
paid to date
87% of proposed penalties paid to date, a $10,291 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.
Rate withheld: 912 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
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: 2023-05-23.
On record since 2023.
Source: MSHA imminent-danger order records, updated weekly.
Tri County Materials Inc. has $77K in proposed MSHA penalties and $2K 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.
$77K
proposed penalties
$69K
current assessed
$67K
paid to date
$2K
outstanding
177 assessments are final orders; 3 contested dockets.
Of $34K in penalties contested before the Commission, $26K was upheld in final decisions.
As of the most recent assessment on 2026-03-04.
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.
17citations taken to the federal commission · 9% of citations on record
Settled
13 · 76%
Stood as issued
4 · 24%
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 8 decided S&S contests · industry: 79%
25%
Penalty reduction in decided contests
$34K proposed, $26K 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 2017-04-18.
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: 2026-04-02
17%
of limit-tested samples over the exposure limit
26
samples
12
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz142 over
Respirable dust, <.1mg8
Unlisted Particulate, respirable, <1% Qtz4
Show the individual readings (26)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2009-07-01
Quartz, respirable, >1% Qtz
0.93
0.89
1.04
Crusher Oper/Worker
2007-06-21
Quartz, respirable, >1% Qtz
0.62
0.33
1.88
Laborer, Bullgang
2026-04-02
Respirable dust, <.1mg
0
Crusher Oper/Worker
2026-03-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-03-04
Quartz, respirable, >1% Qtz
0.96
1.35
0.71
Crusher Oper/Worker
2023-09-21
Unlisted Particulate, respirable, <1% Qtz
0.16
Crusher Oper/Worker
2023-09-21
Unlisted Particulate, respirable, <1% Qtz
0.2
Front-end Loader Operator
2023-09-21
Quartz, respirable, >1% Qtz
0.46
Crusher Oper/Worker
2019-10-31
Quartz, respirable, >1% Qtz
0.63
Crusher Oper/Worker
2019-10-31
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-10-31
Respirable dust, <.1mg
0
Washer Operator
2019-10-31
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-10-31
Quartz, respirable, >1% Qtz
0.68
1.46
0.47
Crusher Oper/Worker
2017-08-02
Unlisted Particulate, respirable, <1% Qtz
0.29
Crusher Oper/Worker
2017-08-02
Quartz, respirable, >1% Qtz
0.28
2.37
0.12
Crusher Oper/Worker
2015-08-12
Respirable dust, <.1mg
0
Laborer, Bullgang
2015-08-12
Respirable dust, <.1mg
0
Crusher Oper/Worker
2015-08-12
Respirable dust, <.1mg
0
Washer Operator
2009-07-01
Quartz, respirable, >1% Qtz
0.25
2.04
0.12
Mechanic
2009-07-01
Quartz, respirable, >1% Qtz
0.15
1.65
0.09
Washer Operator
2009-07-01
Quartz, respirable, >1% Qtz
0.43
2.08
0.21
Cleanup Man
2007-08-29
Unlisted Particulate, respirable, <1% Qtz
0.27
Crusher Oper/Worker
2007-06-21
Quartz, respirable, >1% Qtz
0.52
1.89
0.28
Laborer, Bullgang
2007-06-21
Quartz, respirable, >1% Qtz
0.58
2.21
0.26
Laborer, Bullgang
2007-06-21
Quartz, respirable, >1% Qtz
0.18
0.59
0.31
Truck Driver
2007-06-21
Quartz, respirable, >1% Qtz
0.66
1.2
0.55
Laborer, Bullgang
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.
Tri County Materials Inc. 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 *
0.00
0.00
0.000
2022 *
8.89
0.00
0.000
2010 *
0.00
0.00
0.000
2008 *
0.00
0.00
0.000
2007 *
0.00
0.00
0.000
2006 *
0.00
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
10
2025
14
2024
16
2023
14
2022
12
2021
10
2020
10
2019
9
2018
9
2017
8
2016
8
2015
8
2014
8
2013
8
2012
8
2011
10
2010
11
2009
12
2008
13
2007
11
2006
10
2005
8
2004
10
2003
10
2002
12
2001
10
2000
9
Source: MSHA quarterly employment and production, updated weekly.
Tri County Materials Inc. sits in Graham County, Arizona, where the Census mining category is 11.5% 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.
Graham County, Arizona · Population 38,860
11.5%
Mining share of county employment
$67,326
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 1/28/22 a Ready mix concrete truck descended down a 10% grade mine road when the brakes of the truck became compromised. The driver lost control and the truck tipped over. IE was a passenger in training and suffered a broken leg in the accident.
2019 · 1 incident
April 2, 2019AZ · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
Working on replacing belts on crusher. A ratchet slipped off the bolt head, another bolt that had not been removed was sticking out below, employee's thumb struck it and severely lacerated below the nail.
On Feb 28 at about 6:30 the loader operator discovered a fatal vehicle accident on the south side of the mine pit. The vehicle crashed onto mine site from a public road.
February 23, 2017AZ · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanOTHER