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Chino Pit Metal/Non-Metal

Controlled by Arthur C Mc Mains
Mesa, Yavapai County, AZ  ·  Active
MSHA Mine ID: 0202913

Chino Pit has $32K in proposed MSHA penalties and $1K outstanding across 4 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
5
Years on record
2006–2022
Latest incident
Aug 2022
Compliance record
MSHA citations since 2000
149
citations
43
significant & substantial
$31,710
proposed penalties
$23,709
paid to date
75% of proposed penalties paid to date, a $8,001 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
76
inspections on record
1,043
inspection hours
14.3
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.
149 citations across 1,043 inspection hours.
Source: MSHA inspections data, updated weekly.

Chino Pit has $32K in proposed MSHA penalties and $1K 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.
$32K
proposed penalties
$25K
current assessed
$24K
paid to date
$1K
outstanding
138 assessments are final orders; 4 contested dockets.
As of the most recent assessment on 2026-05-28.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also the operator's enforcement record
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
2025 Q4 4,897 0 0 0.0
2025 Q3 5,026 0 0 0.0
2025 Q2 4,652 0 0 0.0
2025 Q1 4,764 0 0 0.0
2024 Q4 4,520 0 0 0.0
2024 Q3 4,628 0 0 0.0
2024 Q2 4,924 0 0 0.0
2024 Q1 4,142 1 0 241.4
Show 90 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 4,339 1 1 230.5
2023 Q3 4,158 3 2 721.5
2023 Q2 4,141 0 0 0.0
2023 Q1 3,229 1 0 309.7
2022 Q4 3,731 0 0 0.0
2022 Q3 3,482 6 0 1723.1
2022 Q2 4,229 0 0 0.0
2022 Q1 3,739 0 0 0.0
2021 Q4 3,877 0 0 0.0
2021 Q3 3,408 0 0 0.0
2021 Q2 3,465 0 0 0.0
2021 Q1 3,323 0 0 0.0
2020 Q4 3,325 0 0 0.0
2020 Q3 3,840 0 0 0.0
2020 Q2 3,601 2 0 555.4
2020 Q1 3,295 0 0 0.0
2019 Q4 3,633 0 0 0.0
2019 Q3 3,670 0 0 0.0
2019 Q2 4,084 0 0 0.0
2019 Q1 3,045 0 0 0.0
2018 Q4 3,548 0 0 0.0
2018 Q3 3,681 0 0 0.0
2018 Q2 3,880 0 0 0.0
2018 Q1 3,660 0 0 0.0
2017 Q4 3,457 0 0 0.0
2017 Q3 2,859 0 0 0.0
2017 Q2 3,016 2 0 663.1
2017 Q1 2,911 0 0 0.0
2016 Q4 3,017 3 1 994.4
2016 Q3 2,932 0 0 0.0
2016 Q2 3,232 3 0 928.2
2016 Q1 3,073 0 0 0.0
2015 Q4 2,989 5 0 1672.8
2015 Q3 3,375 1 0 296.3
2015 Q2 3,473 0 0 0.0
2015 Q1 2,658 2 0 752.4
2014 Q4 2,485 0 0 0.0
2014 Q3 2,471 1 0 404.7
2014 Q2 2,333 0 0 0.0
2014 Q1 2,046 8 2 3910.1
2013 Q4 1,980 0 0 0.0
2013 Q3 1,888 0 0 0.0
2013 Q2 1,559 1 0 641.4
2013 Q1 1,117 0 0 0.0
2012 Q4 2,438 0 0 0.0
2012 Q3 1,599 0 0 0.0
2012 Q2 1,671 0 0 0.0
2012 Q1 1,485 0 0 0.0
2011 Q4 1,175 0 0 0.0
2011 Q3 1,291 0 0 0.0
2011 Q2 1,325 0 0 0.0
2011 Q1 1,668 0 0 0.0
2010 Q4 1,320 1 0 757.6
2010 Q3 1,376 0 0 0.0
2010 Q2 1,371 2 1 1458.8
2010 Q1 1,324 0 0 0.0
2009 Q4 1,137 0 0 0.0
2009 Q3 1,878 0 0 0.0
2009 Q2 2,573 0 0 0.0
2009 Q1 2,773 4 0 1442.5
2008 Q4 3,534 0 0 0.0
2008 Q3 3,670 0 0 0.0
2008 Q2 3,941 0 0 0.0
2008 Q1 4,100 0 0 0.0
2007 Q4 4,032 1 0 248.0
2007 Q3 4,121 0 0 0.0
2007 Q2 4,682 0 0 0.0
2007 Q1 4,090 3 0 733.5
2006 Q4 3,783 1 0 264.3
2006 Q3 4,584 0 0 0.0
2006 Q2 3,708 1 1 269.7
2006 Q1 4,306 0 0 0.0
2005 Q4 3,160 1 1 316.5
2005 Q3 6,165 3 0 486.6
2005 Q2 3,810 8 2 2099.7
2005 Q1 6,700 0 0 0.0
2004 Q4 5,820 0 0 0.0
2004 Q3 6,240 4 2 641.0
2004 Q2 6,840 0 0 0.0
2004 Q1 6,000 18 8 3000.0
2003 Q4 7,400 1 0 135.1
2003 Q3 7,100 0 0 0.0
2003 Q2 7,460 16 3 2144.8
2003 Q1 7,200 0 0 0.0
2002 Q3 3,840 9 4 2343.8
2002 Q2 750 0 0 0.0
2002 Q1 0 0 0
2001 Q4 0 0 0
2001 Q3 0 0 0
2001 Q2 0 0 0
No fatalities recorded at this mine.

Reportable incidents

5 on file

2022 · 1 incident

August 16, 2022 AZ · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Arrowhead Mining & Materials LLC · Struck by... (Not Elsewhere Classified)

Changing cutting edge bolt on 966K loader, fully gloved when bolt head spun and cut through glove therefore causing a laceration to the left thumb pad. Required nine stitches.

2015 · 1 incident

July 8, 2015 AZ · Metal/Non-Metal mine manager, mine foreman, mine owner HANDTOOLS (NONPOWERED)
Arrowhead Mining & Materials LLC · Over-exertion in wielding or throwing objects

The aggravation of a pre existing injury to upper right arm. This was noticed when swinging a hammer.

2009 · 1 incident

February 6, 2009 AZ · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Arrowhead Materials · Unclassified, insufficient data

Employee complained of slight pain or discomfort in Left Wrist, did not know of any work contributing factors at that time. Employee was treated at Prescott Valley Primary and Urgent care with no confirmed diagnosis.

2008 · 1 incident

August 20, 2008 AZ · Metal/Non-Metal clerk, timekeeper, office worker, director of sales HANDLING OF MATERIALS
Arrowhead Materials · Absorption of radiations, caustics, toxic and noxious substances

While removing trash bags from an elevated shelf in the office restroom, employee also pulled down a container of AjAx powdered cleaner with bleach. The container upended and emptied a portion of its contents onto her head, face, and in her eyes.

2006 · 1 incident

October 5, 2006 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Arrowhead Mining & Materials LLC · Caught in, under or between a moving and a stationary object

While backing up, he got his thumb caught between ROPS and guard on conveyor belt. Plant was not in operation.

For insurers, brokers, and safety consultants

The full compliance file on Chino Pit

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.

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