Mining Incidents

Roberti Ranch: 3 MSHA citations Metal/Non-Metal

Folchi Logging & Construction Inc · Surface
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.
Violation severity profile
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
0.0%
significant & substantial
0.0%
high negligence or reckless
0.0%
reasonably likely or greater
33.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 33.3% low, 66.7% moderate, 0.0% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
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: 2025-11-13
2
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg2
Show the individual readings (2)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-11-13 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-11-02 Respirable dust, <.1mg 0 Front-end Loader Operator
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.
Ownership history
  1. Valley Materials & Equipment 2009 to 2015
  2. Folchi Logging & Construction Inc 2015 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 2
2025 1
2024 2
2023 2
2022 2
2021 2
2020 2
2019 2
2018 2
2017 2
2016 2
2015 2
2014 1
2013 1
2012 1
2011 1
2010 0
2009 1
Source: MSHA quarterly employment and production, updated weekly.

Roberti Ranch sits in Plumas County, California, where the Census mining category is 0.5% 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.
Plumas County, California · Population 19,607
0.5%
Mining share of county employment
$64,946
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
Quarter Hours worked Citations S&S Per 1M hrs
2026 Q2 639 0 0 0.0
2026 Q1 192 0 0 0.0
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
Show 58 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q1 0 0 0
2023 Q4 742 0 0 0.0
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.