Mining Incidents

Extec: 19 MSHA citations Metal/Non-Metal

Kernen Construction · Surface
Blue Lake, Humboldt County, CA  ·  Intermittent
MSHA Mine ID: 0405684

Extec has $2K 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 2009
19
citations
4
significant & substantial
$2,380
proposed penalties
$2,380
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2007
21
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.

Extec has $2K 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.
$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
19 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-12-17.
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.
21.1%
significant & substantial
0.0%
high negligence or reckless
21.1%
reasonably likely or greater
47.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 10.5% low, 89.5% 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: 2023-03-23, 3 years ago
3
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg3
Show the individual readings (3)
Date Contaminant Concentration Limit Conc / limit Occupation
2023-03-23 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-04-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2011-05-10 Respirable dust, <.1mg 0 Scraper 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. Kernen Construction 2006 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 0
2025 1
2024 2
2023 0
2022 2
2021 1
2020 1
2019 3
2018 2
2017 3
2016 3
2015 4
2014 3
2013 3
2012 2
2011 2
2010 2
2009 2
2008 0
2007 2
2006 2
Source: MSHA quarterly employment and production, updated weekly.

Extec 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 1,507 1 0 663.6
2025 Q3 0 0 0
2025 Q2 0 0 0
2025 Q1 1 4 0 4000000.0
2024 Q4 0 0 0
2024 Q3 0 1 0
Show 66 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,468 0 0 0.0
2024 Q1 814 0 0 0.0
2023 Q4 0 0 0
2023 Q3 0 0 0
2023 Q2 0 0 0
2023 Q1 0 0 0
2022 Q4 0 0 0
2022 Q3 905 0 0 0.0
2022 Q2 0 0 0
2022 Q1 985 0 0 0.0
2021 Q4 424 0 0 0.0
2021 Q3 0 0 0
2021 Q2 1 0 0 0.0
2021 Q1 1 0 0 0.0
2020 Q4 0 0 0
2020 Q3 0 0 0
2020 Q2 0 0 0
2020 Q1 752 0 0 0.0
2019 Q4 1,094 1 0 914.1
2019 Q3 985 0 0 0.0
2019 Q2 283 0 0 0.0
2019 Q1 0 0 0
2018 Q4 0 0 0
2018 Q3 695 0 0 0.0
2018 Q1 872 0 0 0.0
2017 Q4 583 0 0 0.0
2017 Q3 227 0 0 0.0
2016 Q4 378 1 0 2645.5
2016 Q3 717 0 0 0.0
2016 Q1 590 0 0 0.0
2015 Q4 134 0 0 0.0
2015 Q3 121 0 0 0.0
2015 Q2 41 3 1 73170.7
2015 Q1 1,018 0 0 0.0
2014 Q4 308 0 0 0.0
2014 Q3 263 2 1 7604.6
2014 Q2 25 0 0 0.0
2014 Q1 0 0 0
2013 Q4 276 0 0 0.0
2013 Q3 474 0 0 0.0
2012 Q4 0 0 0
2012 Q3 680 1 0 1470.6
2012 Q2 276 0 0 0.0
2011 Q4 455 0 0 0.0
2011 Q3 1,029 0 0 0.0
2011 Q2 850 2 1 2352.9
2011 Q1 262 0 0 0.0
2010 Q4 303 0 0 0.0
2010 Q3 950 2 1 2105.3
2010 Q2 100 0 0 0.0
2010 Q1 23 0 0 0.0
2009 Q4 1,277 0 0 0.0
2009 Q3 771 1 0 1297.0
2009 Q2 0 0 0
2009 Q1 0 0 0
2008 Q4 0 0 0
2008 Q3 0 0 0
2008 Q2 0 0 0
2008 Q1 0 0 0
2007 Q4 0 0 0
2007 Q3 243 0 0 0.0
2007 Q2 0 0 0
2007 Q1 1,159 0 0 0.0
2006 Q4 371 0 0 0.0
2006 Q3 0 0 0
2006 Q2 2,131 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.