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Portable Plant #3: 36 MSHA citations Metal/Non-Metal

Strata Corp · Surface
Controlled by Knife River Corporation
Grand Forks, Grand Forks County, ND  ·  Intermittent
MSHA Mine ID: 3200150

Portable Plant #3 has $8K 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
3
Years on record
1995–2001
Latest incident
Aug 2001
Compliance record
MSHA citations since 2000
36
citations
6
significant & substantial
$7,844
proposed penalties
$37,844
paid to date
482% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Strata Corp's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
26
inspections on record
318
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: 318 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 Plant #3 has $8K 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.
$8K
proposed penalties
$38K
current assessed
$38K
paid to date
$0
outstanding
36 assessments are final orders; 1 contested dockets.
Of $4K in penalties contested before the Commission, $34K was upheld in final decisions.
As of the most recent assessment on 2022-06-24.
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.
16.7%
significant & substantial
13.9%
high negligence or reckless
16.7%
reasonably likely or greater
52.8%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 0.0% low, 86.1% moderate, 13.9% 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.
8 citations taken to the federal commission · 22% of citations on record
  • Settled 8 · 100%
100%
S&S designation survived the contest
ⓘ Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 8 decided S&S contests · industry: 79%
0%
Penalty reduction in decided contests
$13K proposed, $43K 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 2015-05-28.
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
CENT 2013-42M Settlement Feldman 2015 $4K → $34K
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: 2025-07-23
0%
of limit-tested samples over the exposure limit
10
samples
2
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg7
  • Quartz, respirable, >1% Qtz3
Show the individual readings (10)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-07-23 Respirable dust, <.1mg 0 Crusher Oper/Worker
2025-07-23 Respirable dust, <.1mg 0 Bulldozer Operator
2023-11-16 Respirable dust, <.1mg 0 Bulldozer Operator
2023-11-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-11-16 Respirable dust, <.1mg 0 Cleanup Man
2022-06-25 Quartz, respirable, >1% Qtz 0.7 1.56 0.45 Laborer, Bullgang
2022-06-25 Respirable dust, <.1mg 0 Bulldozer Operator
2022-06-25 Quartz, respirable, >1% Qtz 0.35 Crusher Oper/Worker
2015-11-04 Respirable dust, <.1mg 0 Bulldozer Operator
2015-11-04 Quartz, respirable, >1% Qtz 0.13 1 0.13 Cleanup Man
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. Strata Corp 1950 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 3
2025 5
2024 3
2023 3
2022 4
2021 3
2020 3
2019 4
2018 3
2017 6
2016 5
2015 5
2014 4
2013 4
2012 7
2011 0
2010 2
2009 2
2008 2
2007 1
2003 0
2002 0
2001 3
2000 4
Source: MSHA quarterly employment and production, updated weekly.

Portable Plant #3 sits in Grand Forks County, North Dakota, where the Census mining category is 0.3% 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.
Grand Forks County, North Dakota · Population 72,764
0.3%
Mining share of county employment
$68,450
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 4,118 0 0 0.0
2026 Q1 0 0 0
2025 Q4 2,501 0 0 0.0
2025 Q3 3,335 0 0 0.0
2025 Q2 3,045 0 0 0.0
2025 Q1 0 0 0
2024 Q4 2,163 0 0 0.0
2024 Q3 3,639 0 0 0.0
Show 80 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 4,038 0 0 0.0
2024 Q1 0 0 0
2023 Q4 2,506 0 0 0.0
2023 Q3 3,246 0 0 0.0
2023 Q2 2,458 0 0 0.0
2023 Q1 0 0 0
2022 Q4 1,777 0 0 0.0
2022 Q3 3,711 0 0 0.0
2022 Q2 3,052 1 0 327.7
2022 Q1 0 0 0
2021 Q4 1,127 0 0 0.0
2021 Q3 3,191 0 0 0.0
2021 Q2 2,844 3 0 1054.9
2021 Q1 0 0 0
2020 Q4 1,056 0 0 0.0
2020 Q3 3,722 1 0 268.7
2020 Q2 2,670 0 0 0.0
2020 Q1 0 0 0
2019 Q4 2,228 0 0 0.0
2019 Q3 2,868 0 0 0.0
2019 Q2 2,605 0 0 0.0
2019 Q1 0 0 0
2018 Q4 1,721 0 0 0.0
2018 Q3 2,801 0 0 0.0
2018 Q2 3,461 0 0 0.0
2018 Q1 0 0 0
2017 Q4 3,851 4 1 1038.7
2017 Q3 4,731 0 0 0.0
2017 Q2 4,493 2 1 445.1
2017 Q1 970 0 0 0.0
2016 Q4 1,144 0 0 0.0
2016 Q3 4,074 0 0 0.0
2016 Q2 3,592 0 0 0.0
2016 Q1 642 0 0 0.0
2015 Q4 2,721 0 0 0.0
2015 Q3 3,443 0 0 0.0
2015 Q2 3,176 0 0 0.0
2015 Q1 520 0 0 0.0
2014 Q4 1,947 0 0 0.0
2014 Q3 2,582 0 0 0.0
2014 Q2 2,291 0 0 0.0
2014 Q1 642 0 0 0.0
2013 Q4 3,895 4 0 1027.0
2013 Q3 3,399 0 0 0.0
2013 Q2 2,135 1 0 468.4
2013 Q1 0 0 0
2012 Q4 3,936 0 0 0.0
2012 Q3 5,764 4 2 694.0
2012 Q2 5,468 0 0 0.0
2011 Q2 0 0 0
2011 Q1 0 0 0
2010 Q4 264 0 0 0.0
2010 Q3 1,265 0 0 0.0
2010 Q2 1,036 0 0 0.0
2010 Q1 0 0 0
2009 Q4 100 0 0 0.0
2009 Q3 839 0 0 0.0
2009 Q2 890 0 0 0.0
2009 Q1 0 0 0
2008 Q4 808 5 0 6188.1
2008 Q3 1,356 3 0 2212.4
2008 Q2 813 2 1 2460.0
2008 Q1 0 0 0
2007 Q4 0 0 0
2007 Q3 1,440 0 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 0 0 0
2002 Q2 0 0 0
2002 Q1 482 0 0 0.0
2001 Q4 1,115 0 0 0.0
2001 Q3 3,702 0 0 0.0
2001 Q2 2,206 0 0 0.0
2001 Q1 600 0 0 0.0
2000 Q4 1,659 4 0 2411.1
2000 Q3 3,822 2 1 523.3
2000 Q2 2,728 0 0 0.0
2000 Q1 787 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

3 on file

2001 · 1 incident

August 28, 2001 ND · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer STRIKING OR BUMPING
Strata Corp · Struck against stationary object

DURING PLANT SETUP EE WALKED TO BACK OF CRAWLER TO DO SOMETHING, STOOD UP TOO QUICKLY & HIT HIS HEAD ON RIPPER.

1999 · 1 incident

May 21, 1999 ND · Metal/Non-Metal mine manager, mine foreman, mine owner HANDLING OF MATERIALS
Strata Corp · Struck by falling object

CHANGING HAMMERS AND ANVILS ON JAW CRUSHER THROWING ANVILS OFF, I FELL AND SCRAPED TOP OF MIDDLE FINGER, RT. HAND.

1995 · 1 incident

August 1, 1995 ND · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Strata Corp · Struck by... (Not Elsewhere Classified)

WORKING TIGHTENING BOLTS ON LOADER BUCKET PLATE. WENT TO LOWER BUCKET--MOVED CONTROL WHILE OUTSIDE CAGE, ARMS WENT UP, CATCHING LEFT LEG & ANKLE.