Mining Incidents

Portable #1 Big Plant Metal/Non-Metal

various, Amador County, CA  ·  Intermittent
MSHA Mine ID: 0405495

Portable #1 Big Plant has $13K in proposed MSHA penalties and $0 outstanding across 3 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 2001
93
citations
12
significant & substantial
$12,881
proposed penalties
$12,873
paid to date
100% of proposed penalties paid to date, a $8 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
43
inspections on record
504
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: 504 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Portable #1 Big Plant has $13K in proposed MSHA penalties and $0 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.
$13K
proposed penalties
$13K
current assessed
$13K
paid to date
$0
outstanding
93 assessments are final orders; 3 contested dockets.
As of the most recent assessment on 2025-04-24.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
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 1,792 0 0 0.0
2025 Q3 2,398 0 0 0.0
2025 Q2 2,434 6 2 2465.1
2025 Q1 0 0 0
2024 Q4 2,094 0 0 0.0
2024 Q3 3,109 0 0 0.0
2024 Q2 2,427 0 0 0.0
2024 Q1 1,560 0 0 0.0
Show 89 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 1,514 0 0 0.0
2023 Q3 1,687 0 0 0.0
2023 Q2 2,574 2 1 777.0
2023 Q1 1,391 0 0 0.0
2022 Q4 223 0 0 0.0
2022 Q3 1,878 2 0 1065.0
2022 Q2 2,646 0 0 0.0
2022 Q1 2,665 0 0 0.0
2021 Q4 2,011 0 0 0.0
2021 Q3 2,609 0 0 0.0
2021 Q2 1,913 0 0 0.0
2021 Q1 1,566 0 0 0.0
2020 Q4 2,087 0 0 0.0
2020 Q3 2,369 0 0 0.0
2020 Q2 2,861 1 0 349.5
2020 Q1 1,856 0 0 0.0
2019 Q4 1,481 2 0 1350.4
2019 Q3 2,267 0 0 0.0
2019 Q2 2,129 3 0 1409.1
2019 Q1 1,565 0 0 0.0
2018 Q4 1,870 0 0 0.0
2018 Q3 1,368 0 0 0.0
2018 Q2 2,191 3 0 1369.2
2018 Q1 2,778 3 0 1079.9
2017 Q4 2,229 0 0 0.0
2017 Q3 3,070 0 0 0.0
2017 Q2 2,791 0 0 0.0
2017 Q1 2,972 6 1 2018.8
2016 Q4 2,852 0 0 0.0
2016 Q3 3,907 10 2 2559.5
2016 Q2 3,662 0 0 0.0
2016 Q1 4,288 0 0 0.0
2015 Q4 3,372 0 0 0.0
2015 Q3 2,444 1 0 409.2
2015 Q2 3,484 0 0 0.0
2015 Q1 2,229 0 0 0.0
2014 Q4 2,805 0 0 0.0
2014 Q3 1,459 2 0 1370.8
2014 Q2 0 0 0
2014 Q1 2,008 0 0 0.0
2013 Q4 2,265 0 0 0.0
2013 Q3 3,965 10 2 2522.1
2013 Q2 1,860 0 0 0.0
2013 Q1 0 0 0
2012 Q4 4,030 0 0 0.0
2012 Q3 4,718 0 0 0.0
2012 Q2 2,566 0 0 0.0
2012 Q1 0 0 0
2011 Q4 2,959 8 0 2703.6
2011 Q3 4,423 0 0 0.0
2011 Q2 387 0 0 0.0
2011 Q1 140 0 0 0.0
2010 Q4 662 0 0 0.0
2010 Q3 1,675 5 0 2985.1
2010 Q2 616 0 0 0.0
2010 Q1 700 0 0 0.0
2009 Q4 1,655 0 0 0.0
2009 Q3 1,095 5 0 4566.2
2009 Q2 191 0 0 0.0
2009 Q1 0 0 0
2008 Q4 1,144 0 0 0.0
2008 Q3 2,673 0 0 0.0
2008 Q2 2,553 0 0 0.0
2008 Q1 1,098 0 0 0.0
2007 Q4 2,276 3 0 1318.1
2007 Q3 1,808 0 0 0.0
2007 Q2 3,576 0 0 0.0
2007 Q1 1,975 0 0 0.0
2006 Q4 2,132 0 0 0.0
2006 Q3 3,243 4 2 1233.4
2006 Q2 2,026 0 0 0.0
2006 Q1 1,362 0 0 0.0
2005 Q4 3,940 0 0 0.0
2005 Q3 2,100 0 0 0.0
2005 Q2 3,166 8 2 2526.8
2005 Q1 671 0 0 0.0
2004 Q4 2,723 0 0 0.0
2004 Q3 2,169 2 0 922.1
2004 Q2 483 0 0 0.0
2004 Q1 240 0 0 0.0
2003 Q4 1,588 0 0 0.0
2003 Q3 886 0 0 0.0
2003 Q2 2,121 0 0 0.0
2003 Q1 1,199 1 0 834.0
2002 Q4 1,717 0 0 0.0
2002 Q3 6,500 0 0 0.0
2002 Q2 2,779 2 0 719.7
2002 Q1 2,688 0 0 0.0
2001 Q4 3,100 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 Portable #1 Big Plant

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.