Mayer Onyx Metal/Non-Metal
Stoneworld Co.
· Surface
Controlled by
Ray Bosiljcic; Liliana Bosiljcic
Mayer,
Yavapai County,
AZ
·
Active
MSHA Mine ID: 0202987
Mayer Onyx has $62K in proposed MSHA penalties and $3K outstanding across 0 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2004
116
citations
40
significant & substantial
$61,777
proposed penalties
$59,093
paid to date
96% of proposed penalties paid to date, a $2,684 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2004
60
inspections on record
508
inspection hours
n/a
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: 508 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Mayer Onyx has $62K in proposed MSHA penalties and $3K 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.$62K
proposed penalties
$62K
current assessed
$59K
paid to date
$3K
outstanding
111 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-02-25.
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 | 2,544 | 0 | 0 | 0.0 |
| 2025 Q3 | 2,880 | 0 | 0 | 0.0 |
| 2025 Q2 | 2,736 | 0 | 0 | 0.0 |
| 2025 Q1 | 2,784 | 2 | 1 | 718.4 |
| 2024 Q4 | 3,136 | 0 | 0 | 0.0 |
| 2024 Q3 | 3,456 | 0 | 0 | 0.0 |
| 2024 Q2 | 4,160 | 1 | 0 | 240.4 |
| 2024 Q1 | 3,648 | 1 | 0 | 274.1 |
Show 85 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2023 Q4 | 2,880 | 15 | 8 | 5208.3 |
| 2023 Q3 | 5,040 | 0 | 0 | 0.0 |
| 2023 Q2 | 3,120 | 13 | 6 | 4166.7 |
| 2023 Q1 | 2,928 | 0 | 0 | 0.0 |
| 2022 Q4 | 2,736 | 3 | 0 | 1096.5 |
| 2022 Q3 | 2,016 | 0 | 0 | 0.0 |
| 2022 Q2 | 1,920 | 0 | 0 | 0.0 |
| 2022 Q1 | 2,048 | 6 | 0 | 2929.7 |
| 2021 Q4 | 2,016 | 0 | 0 | 0.0 |
| 2021 Q3 | 2,080 | 0 | 0 | 0.0 |
| 2021 Q2 | 1,952 | 0 | 0 | 0.0 |
| 2021 Q1 | 2,016 | 0 | 0 | 0.0 |
| 2020 Q4 | 1,920 | 2 | 0 | 1041.7 |
| 2020 Q3 | 1,536 | 0 | 0 | 0.0 |
| 2020 Q2 | 1,536 | 8 | 6 | 5208.3 |
| 2020 Q1 | 1,320 | 0 | 0 | 0.0 |
| 2019 Q4 | 720 | 0 | 0 | 0.0 |
| 2019 Q3 | 1,536 | 0 | 0 | 0.0 |
| 2019 Q2 | 1,536 | 0 | 0 | 0.0 |
| 2019 Q1 | 1,248 | 2 | 0 | 1602.6 |
| 2018 Q4 | 1,320 | 0 | 0 | 0.0 |
| 2018 Q3 | 1,440 | 0 | 0 | 0.0 |
| 2018 Q2 | 1,984 | 0 | 0 | 0.0 |
| 2018 Q1 | 2,016 | 1 | 0 | 496.0 |
| 2017 Q4 | 1,984 | 7 | 3 | 3528.2 |
| 2017 Q3 | 2,016 | 0 | 0 | 0.0 |
| 2017 Q2 | 1,488 | 0 | 0 | 0.0 |
| 2017 Q1 | 1,536 | 0 | 0 | 0.0 |
| 2016 Q4 | 1,368 | 2 | 0 | 1462.0 |
| 2016 Q3 | 2,048 | 0 | 0 | 0.0 |
| 2016 Q2 | 960 | 0 | 0 | 0.0 |
| 2016 Q1 | 960 | 1 | 0 | 1041.7 |
| 2015 Q4 | 960 | 0 | 0 | 0.0 |
| 2015 Q3 | 992 | 0 | 0 | 0.0 |
| 2015 Q2 | 1,008 | 0 | 0 | 0.0 |
| 2015 Q1 | 928 | 8 | 4 | 8620.7 |
| 2014 Q4 | 544 | 0 | 0 | 0.0 |
| 2014 Q3 | 0 | 0 | 0 | |
| 2014 Q2 | 0 | 0 | 0 | |
| 2014 Q1 | 0 | 0 | 0 | |
| 2013 Q4 | 0 | 0 | 0 | |
| 2013 Q3 | 0 | 0 | 0 | |
| 2013 Q2 | 0 | 0 | 0 | |
| 2013 Q1 | 0 | 0 | 0 | |
| 2012 Q4 | 8 | 0 | 0 | 0.0 |
| 2012 Q3 | 8 | 4 | 0 | 500000.0 |
| 2012 Q2 | 48 | 0 | 0 | 0.0 |
| 2012 Q1 | 640 | 0 | 0 | 0.0 |
| 2011 Q4 | 480 | 0 | 0 | 0.0 |
| 2011 Q3 | 448 | 9 | 3 | 20089.3 |
| 2011 Q2 | 0 | 0 | 0 | |
| 2011 Q1 | 464 | 0 | 0 | 0.0 |
| 2010 Q4 | 944 | 0 | 0 | 0.0 |
| 2010 Q3 | 752 | 0 | 0 | 0.0 |
| 2010 Q2 | 784 | 7 | 3 | 8928.6 |
| 2010 Q1 | 736 | 0 | 0 | 0.0 |
| 2009 Q4 | 480 | 0 | 0 | 0.0 |
| 2009 Q3 | 0 | 0 | 0 | |
| 2009 Q2 | 368 | 0 | 0 | 0.0 |
| 2009 Q1 | 880 | 0 | 0 | 0.0 |
| 2008 Q4 | 816 | 11 | 4 | 13480.4 |
| 2008 Q3 | 688 | 0 | 0 | 0.0 |
| 2008 Q2 | 1,024 | 0 | 0 | 0.0 |
| 2008 Q1 | 576 | 0 | 0 | 0.0 |
| 2007 Q4 | 544 | 0 | 0 | 0.0 |
| 2007 Q3 | 704 | 0 | 0 | 0.0 |
| 2007 Q2 | 736 | 0 | 0 | 0.0 |
| 2007 Q1 | 1,024 | 0 | 0 | 0.0 |
| 2006 Q4 | 256 | 0 | 0 | 0.0 |
| 2006 Q3 | 848 | 0 | 0 | 0.0 |
| 2006 Q2 | 416 | 0 | 0 | 0.0 |
| 2006 Q1 | 480 | 0 | 0 | 0.0 |
| 2005 Q4 | 507 | 6 | 1 | 11834.3 |
| 2005 Q3 | 1,560 | 0 | 0 | 0.0 |
| 2005 Q2 | 1,488 | 0 | 0 | 0.0 |
| 2005 Q1 | 672 | 0 | 0 | 0.0 |
| 2004 Q4 | 1,008 | 3 | 1 | 2976.2 |
| 2004 Q3 | 1,024 | 1 | 0 | 976.6 |
| 2004 Q2 | 480 | 1 | 0 | 2083.3 |
| 2004 Q1 | 640 | 1 | 0 | 1562.5 |
| 2003 Q4 | 608 | 0 | 0 | 0.0 |
| 2003 Q3 | 0 | 0 | 0 | |
| 2003 Q2 | 0 | 0 | 0 | |
| 2003 Q1 | 144 | 0 | 0 | 0.0 |
| 2002 Q4 | 480 | 0 | 0 | 0.0 |
No reportable incidents on file.
MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.
For insurers, brokers, and safety consultants
The full compliance file on Mayer Onyx
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.