Mining Incidents

Roberti Ranch Metal/Non-Metal

Loyalton, Plumas County, CA  ·  Intermittent
MSHA Mine ID: 0405780

Roberti Ranch has $332 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
0
Years on record
Latest incident
Compliance record
MSHA citations since 2015
3
citations
0
significant & substantial
$332
proposed penalties
$332
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2009
17
inspections on record
170
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: 170 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Roberti Ranch has $332 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.
$332
proposed penalties
$332
current assessed
$332
paid to date
$0
outstanding
3 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2018-06-19.
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 742 0 0 0.0
2025 Q2 702 0 0 0.0
2025 Q1 0 0 0
2024 Q4 716 0 0 0.0
2024 Q3 626 0 0 0.0
2024 Q2 505 0 0 0.0
2024 Q1 0 0 0
2023 Q4 742 0 0 0.0
Show 56 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q3 486 0 0 0.0
2023 Q2 668 0 0 0.0
2023 Q1 0 0 0
2022 Q4 548 0 0 0.0
2022 Q3 348 0 0 0.0
2022 Q2 574 0 0 0.0
2022 Q1 97 0 0 0.0
2021 Q4 689 0 0 0.0
2021 Q3 620 0 0 0.0
2021 Q2 494 0 0 0.0
2021 Q1 0 0 0
2020 Q4 697 0 0 0.0
2020 Q3 624 0 0 0.0
2020 Q2 593 0 0 0.0
2020 Q1 40 0 0 0.0
2019 Q4 717 0 0 0.0
2019 Q3 465 0 0 0.0
2019 Q2 308 0 0 0.0
2019 Q1 0 0 0
2018 Q4 407 0 0 0.0
2018 Q3 173 0 0 0.0
2018 Q2 408 1 0 2451.0
2018 Q1 0 0 0
2017 Q4 742 0 0 0.0
2017 Q3 442 0 0 0.0
2017 Q2 445 0 0 0.0
2017 Q1 0 0 0
2016 Q4 622 0 0 0.0
2016 Q3 712 1 0 1404.5
2016 Q2 484 0 0 0.0
2016 Q1 0 0 0
2015 Q4 768 0 0 0.0
2015 Q3 1,161 1 0 861.3
2014 Q4 30 0 0 0.0
2014 Q3 30 0 0 0.0
2014 Q1 0 0 0
2013 Q4 0 0 0
2013 Q3 20 0 0 0.0
2013 Q2 30 0 0 0.0
2013 Q1 0 0 0
2012 Q4 10 0 0 0.0
2012 Q3 240 0 0 0.0
2012 Q2 240 0 0 0.0
2012 Q1 0 0 0
2011 Q4 92 0 0 0.0
2011 Q3 418 0 0 0.0
2011 Q2 150 0 0 0.0
2011 Q1 0 0 0
2010 Q4 0 0 0
2010 Q3 0 0 0
2010 Q2 0 0 0
2010 Q1 0 0 0
2009 Q4 208 0 0 0.0
2009 Q3 536 0 0 0.0
2009 Q2 0 0 0
2009 Q1 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 Roberti Ranch

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.