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Humboldt Quarries: 28 MSHA citations Metal/Non-Metal

Controlled by Humboldt County-CA
eureka, Humboldt County, CA  ·  Intermittent
MSHA Mine ID: 0402714

Humboldt Quarries has $3K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
5
Years on record
2008–2022
Latest incident
Aug 2022
Compliance record
MSHA citations since 2004
28
citations
5
significant & substantial
$3,341
proposed penalties
$3,341
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Humboldt County Department of Public Works's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
31
inspections on record
379
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: 379 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Humboldt Quarries has $3K in proposed MSHA penalties and $0 outstanding across 1 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.
$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
28 assessments are final orders; 1 contested dockets.
Of $100 in penalties contested before the Commission, $0 was upheld in final decisions.
As of the most recent assessment on 2022-07-21.
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.
17.9%
significant & substantial
3.6%
high negligence or reckless
17.9%
reasonably likely or greater
46.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 7.1% low, 89.3% moderate, 3.6% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘ Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
1 citations taken to the federal commission · 4% of citations on record
  • Vacated or withdrawn 1 · 100%
100%
Penalty reduction in decided contests
$100 proposed, $0 after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2013-10-17.
Contested penalties
ⓘ A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
WEST 2014-30M Withdrawal Manning 2014 $100 → $0
Source: FMSHRC civil penalty dockets and decisions (public record), 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: 2017-06-14, 9 years ago
33%
of limit-tested samples over the exposure limit
7
samples
3
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz31 over
  • Respirable dust, <.1mg3
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (7)
Date Contaminant Concentration Limit Conc / limit Occupation
2011-10-25 Quartz, respirable, >1% Qtz 0.46 0.42 1.10 Bulldozer Operator
2017-06-14 Unlisted Particulate, respirable, <1% Qtz 0.18 Crusher Oper/Worker
2016-06-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-06-14 Respirable dust, <.1mg 0 Supervisor, Co. Official
2011-10-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-10-25 Quartz, respirable, >1% Qtz 0.17 0.47 0.36 Bulldozer Operator
2011-10-25 Quartz, respirable, >1% Qtz 0.46 0.55 0.84 Crusher Oper/Worker
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. Humboldt County Department of Public Works 1950 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 0
2025 4
2024 2
2023 1
2022 2
2021 2
2020 2
2019 3
2018 2
2017 2
2016 2
2015 1
2014 1
2013 2
2012 2
2011 4
2010 3
2009 3
2008 4
2007 2
2006 1
2005 2
2004 2
2003 0
2002 2
2001 3
2000 3
Source: MSHA quarterly employment and production, updated weekly.

Humboldt Quarries sits in Humboldt County, California, where the Census mining category is 0.1% 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.
Humboldt County, California · Population 135,418
0.1%
Mining share of county employment
$61,135
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 0 0 0
2026 Q1 0 0 0
2025 Q4 78 0 0 0.0
2025 Q3 340 0 0 0.0
2025 Q2 657 0 0 0.0
2025 Q1 367 0 0 0.0
2024 Q4 0 0 0
2024 Q3 318 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 347 0 0 0.0
2024 Q1 0 0 0
2023 Q4 0 0 0
2023 Q3 583 0 0 0.0
2023 Q2 277 0 0 0.0
2023 Q1 0 0 0
2022 Q4 115 0 0 0.0
2022 Q3 480 1 0 2083.3
2022 Q2 270 0 0 0.0
2022 Q1 0 0 0
2021 Q4 0 0 0
2021 Q3 1,010 1 1 990.1
2021 Q2 700 0 0 0.0
2021 Q1 0 0 0
2020 Q4 245 0 0 0.0
2020 Q3 695 0 0 0.0
2020 Q2 270 0 0 0.0
2020 Q1 0 0 0
2019 Q4 30 0 0 0.0
2019 Q3 475 0 0 0.0
2019 Q2 945 0 0 0.0
2019 Q1 120 2 1 16666.7
2018 Q4 185 0 0 0.0
2018 Q3 1,043 0 0 0.0
2018 Q2 666 0 0 0.0
2018 Q1 0 0 0
2017 Q4 330 0 0 0.0
2017 Q3 928 0 0 0.0
2017 Q2 374 2 0 5347.6
2017 Q1 0 0 0
2016 Q4 130 0 0 0.0
2016 Q3 817 0 0 0.0
2016 Q2 315 3 0 9523.8
2016 Q1 0 0 0
2015 Q4 606 0 0 0.0
2015 Q3 66 0 0 0.0
2015 Q2 0 0 0
2015 Q1 0 0 0
2014 Q4 0 0 0
2014 Q3 600 0 0 0.0
2014 Q2 648 0 0 0.0
2014 Q1 0 0 0
2013 Q4 368 0 0 0.0
2013 Q3 742 0 0 0.0
2013 Q2 614 0 0 0.0
2013 Q1 0 0 0
2012 Q4 0 0 0
2012 Q3 641 0 0 0.0
2012 Q2 300 0 0 0.0
2012 Q1 0 0 0
2011 Q4 728 8 0 10989.0
2011 Q3 1,176 0 0 0.0
2010 Q4 539 0 0 0.0
2010 Q3 888 1 0 1126.1
2010 Q2 254 0 0 0.0
2010 Q1 0 0 0
2009 Q4 168 0 0 0.0
2009 Q3 1,531 2 1 1306.3
2009 Q2 881 0 0 0.0
2009 Q1 0 0 0
2008 Q4 912 0 0 0.0
2008 Q3 929 1 0 1076.4
2008 Q2 1,616 0 0 0.0
2008 Q1 229 0 0 0.0
2007 Q4 339 0 0 0.0
2007 Q3 349 4 0 11461.3
2007 Q2 286 0 0 0.0
2007 Q1 0 0 0
2006 Q4 0 0 0
2006 Q3 198 0 0 0.0
2006 Q2 0 0 0
2006 Q1 0 0 0
2005 Q4 504 0 0 0.0
2005 Q3 822 0 0 0.0
2005 Q2 0 0 0
2005 Q1 0 1 0
2004 Q4 0 0 0
2004 Q3 967 2 2 2068.3
2004 Q2 420 0 0 0.0
2004 Q1 0 0 0
2003 Q4 0 0 0
2003 Q3 0 0 0
2003 Q2 0 0 0
2003 Q1 0 0 0
2002 Q4 0 0 0
2002 Q3 372 0 0 0.0
2002 Q2 273 0 0 0.0
2002 Q1 0 0 0
2001 Q4 652 0 0 0.0
2001 Q3 1,428 0 0 0.0
2001 Q2 901 0 0 0.0
2001 Q1 0 0 0
2000 Q4 546 0 0 0.0
2000 Q3 1,216 0 0 0.0
2000 Q2 201 0 0 0.0
2000 Q1 909 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

5 on file

2022 · 2 incidents

August 10, 2022 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand SLIP OR FALL OF PERSON
Humboldt County Department of Public Works · Fall to the walkway or working surface

I was walking down a slight incline in the rock pit, and there was loose gravel that gave way under my right foot, resulting in me falling to the ground from standing height. When I fell I landed on my left knee, and my right wrist. My left knee had minor scrapes and cuts, and my right wrist received a hard impact and resulted in lots of pain and swelling.

August 4, 2022 CA · Metal/Non-Metal barge/boat/dredge/towbarge/towboat/leach operator, riverman, deck hand HANDLING OF MATERIALS
Humboldt County Department of Public Works · Over-exertion in pulling or pushing objects

Not sure exactly what may have caused injury. I pulled on a water pump pull start motor. Pulled around hose watering pit grounds, it's very heavy. Started running 970 loader and just noticed pain in right shoulder around 11:00 am. Noticed shoulder was worse by 3:00 pm.

2019 · 2 incidents

August 22, 2019 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Humboldt County Department of Public Works · Inhalation of radiations, caustics, toxic and noxious substances

On Wednesday 08/21/2019 this employee was working at crusher site picking rebar from conveyor. On Thursday 08/22/2019 employee told supervisor that it was painful to breathe/sore throat/stuffy nose. Employee said it was the dust from the crusher and wanted to go to the doctor.

2008 · 1 incident