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Portable Plant #2: 42 MSHA citations Metal/Non-Metal

Strata Corporation · Surface
Controlled by Knife River Corporation
Grand Forks, Grand Forks County, ND  ·  Intermittent
MSHA Mine ID: 3200151

Portable Plant #2 has $8K in proposed MSHA penalties and $499 outstanding across 2 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
7
Years on record
1992–2016
Latest incident
Apr 2016
Compliance record
MSHA citations since 2001
42
citations
19
significant & substantial
$7,715
proposed penalties
$7,078
paid to date
92% of proposed penalties paid to date, a $637 gap.
Source: MSHA violations data, updated weekly.
See Strata Corporation's full MSHA compliance history →
Inspection activity
MSHA inspections since 2001
28
inspections on record
361
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: 361 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘ A Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2014-07-21.
On record since 2014.
Source: MSHA imminent-danger order records, updated weekly.

Portable Plant #2 has $8K in proposed MSHA penalties and $499 outstanding across 2 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
$8K
current assessed
$7K
paid to date
$499
outstanding
38 assessments are final orders; 2 contested dockets.
Of $826 in penalties contested before the Commission, $688 was upheld in final decisions.
As of the most recent assessment on 2026-07-20.
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.
46.3%
significant & substantial
4.9%
high negligence or reckless
46.3%
reasonably likely or greater
70.7%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 22.0% low, 73.2% moderate, 4.9% 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.
2 citations taken to the federal commission · 5% of citations on record
  • Settled 2 · 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 2 decided S&S contests · industry: 79%
20%
Penalty reduction in decided contests
$686 proposed, $548 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 2014-10-07.
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 2015-0005 Settlement Feldman 2015 $686 → $548
CENT20010339M Default Barbour 2001 $140 → $140
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: 2021-10-26, 4 years ago
0%
of limit-tested samples over the exposure limit
6
samples
1
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz3
  • Respirable dust, <.1mg3
Show the individual readings (6)
Date Contaminant Concentration Limit Conc / limit Occupation
2021-10-26 Respirable dust, <.1mg 0 Bulldozer Operator
2021-10-26 Quartz, respirable, >1% Qtz 0.17 Front-end Loader Operator
2021-10-26 Quartz, respirable, >1% Qtz 0.25 Crusher Oper/Worker
2012-02-29 Quartz, respirable, >1% Qtz 0.39 2.22 0.18 Bulldozer Operator
2012-02-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-02-29 Respirable dust, <.1mg 0 Front-end Loader Operator

Area samples (mill and shop air)

Last sampled: 2017-06-28, 9 years ago
1
samples
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Area sampled
2017-06-28 Respirable dust, <.1mg 0 SF ORE PROCESSING
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. Dusek Sand & Gravel Inc 1950 to 1990
  2. Strata Corporation 1990 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 4
2025 4
2024 3
2023 4
2022 4
2021 4
2020 4
2019 5
2018 4
2017 6
2016 6
2015 6
2014 4
2013 4
2012 6
2011 4
2010 5
2009 3
2008 3
2007 5
2006 4
2005 4
2004 4
2003 3
2002 3
2001 4
2000 6
Source: MSHA quarterly employment and production, updated weekly.

Portable Plant #2 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 4,680 0 0 0.0
2026 Q1 0 0 0
2025 Q4 2,008 0 0 0.0
2025 Q3 2,991 0 0 0.0
2025 Q2 2,940 1 1 340.1
2025 Q1 0 0 0
2024 Q4 1,943 0 0 0.0
2024 Q3 4,196 0 0 0.0
Show 97 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 3,773 0 0 0.0
2024 Q1 0 0 0
2023 Q4 3,117 0 0 0.0
2023 Q3 4,687 0 0 0.0
2023 Q2 3,602 2 0 555.2
2023 Q1 0 0 0
2022 Q4 2,064 0 0 0.0
2022 Q3 4,160 0 0 0.0
2022 Q2 3,781 0 0 0.0
2022 Q1 0 0 0
2021 Q4 2,050 1 1 487.8
2021 Q3 3,227 0 0 0.0
2021 Q2 4,094 0 0 0.0
2021 Q1 33 0 0 0.0
2020 Q4 2,999 3 0 1000.3
2020 Q3 4,781 0 0 0.0
2020 Q2 3,676 0 0 0.0
2020 Q1 0 0 0
2019 Q4 2,584 0 0 0.0
2019 Q3 3,896 2 0 513.3
2019 Q2 3,525 0 0 0.0
2019 Q1 0 0 0
2018 Q4 2,108 0 0 0.0
2018 Q3 3,773 0 0 0.0
2018 Q2 3,465 0 0 0.0
2018 Q1 0 0 0
2017 Q4 4,326 0 0 0.0
2017 Q3 5,425 3 3 553.0
2017 Q2 5,132 3 3 584.6
2017 Q1 732 0 0 0.0
2016 Q4 2,743 0 0 0.0
2016 Q3 4,701 1 1 212.7
2016 Q2 4,168 0 0 0.0
2016 Q1 745 0 0 0.0
2015 Q4 3,462 0 0 0.0
2015 Q3 5,190 0 0 0.0
2015 Q2 4,336 0 0 0.0
2015 Q1 782 0 0 0.0
2014 Q4 1,381 0 0 0.0
2014 Q3 3,517 4 2 1137.3
2014 Q2 3,052 0 0 0.0
2014 Q1 900 0 0 0.0
2013 Q4 1,994 0 0 0.0
2013 Q3 3,326 0 0 0.0
2013 Q2 2,825 0 0 0.0
2013 Q1 0 0 0
2012 Q4 1,976 0 0 0.0
2012 Q3 4,876 1 1 205.1
2012 Q2 3,070 0 0 0.0
2012 Q1 2,268 5 1 2204.6
2011 Q4 1,801 0 0 0.0
2011 Q3 4,707 2 0 424.9
2011 Q2 2,593 0 0 0.0
2011 Q1 0 0 0
2010 Q4 1,712 0 0 0.0
2010 Q3 4,272 0 0 0.0
2010 Q2 4,965 0 0 0.0
2010 Q1 0 0 0
2009 Q4 205 2 1 9756.1
2009 Q3 1,932 0 0 0.0
2009 Q2 2,221 0 0 0.0
2009 Q1 0 0 0
2008 Q4 1,083 1 0 923.4
2008 Q3 893 0 0 0.0
2008 Q2 2,706 0 0 0.0
2008 Q1 1,668 0 0 0.0
2007 Q4 3,130 2 0 639.0
2007 Q3 2,992 0 0 0.0
2007 Q2 3,019 0 0 0.0
2007 Q1 1,294 0 0 0.0
2006 Q4 2,437 0 0 0.0
2006 Q3 4,716 0 0 0.0
2006 Q2 2,635 0 0 0.0
2006 Q1 517 0 0 0.0
2005 Q4 3,386 1 0 295.3
2005 Q3 4,205 0 0 0.0
2005 Q2 3,975 0 0 0.0
2005 Q1 0 0 0
2004 Q4 3,022 0 0 0.0
2004 Q3 3,530 2 1 566.6
2004 Q2 3,027 0 0 0.0
2003 Q4 2,884 0 0 0.0
2003 Q3 4,256 0 0 0.0
2003 Q2 0 0 0
2003 Q1 0 0 0
2002 Q4 1,421 0 0 0.0
2002 Q3 3,811 0 0 0.0
2002 Q2 2,385 0 0 0.0
2002 Q1 433 0 0 0.0
2001 Q4 1,366 0 0 0.0
2001 Q3 2,914 0 0 0.0
2001 Q2 3,530 4 3 1133.1
2001 Q1 602 0 0 0.0
2000 Q4 1,885 0 0 0.0
2000 Q3 5,375 0 0 0.0
2000 Q2 4,638 0 0 0.0
2000 Q1 235 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

7 on file

2016 · 1 incident

April 29, 2016 ND · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Strata Corporation · Caught in, under or between (Not Elsewhere Classified)

Prying with a Pry bar. Bar slipped and smashed finger between hopper and conveyor.

2012 · 1 incident

September 9, 2012 ND · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor SLIP OR FALL OF PERSON
Strata Corporation · Struck by falling object

Preparing plant for a move, while taking the stairs off of the generator set, he lost his balance and stairs flipped over on him.

2005 · 1 incident

August 17, 2005 ND · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Strata Corporation · Struck by flying object

Changing conveyor belt on a crusher. A piece of belting flew back and hit him above the right eyebrow.

2000 · 2 incidents

November 8, 2000 ND · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Strata Corporation · Caught in, under or between (Not Elsewhere Classified)

FOLDING DOWN PORTABLE LIGHT PLANT HE PINCHED HISRIGHT MIDDLE FINGER PULLING THE CORD (SEVEN STITCHES).

October 10, 2000 ND · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Strata Corporation · Struck by... (Not Elsewhere Classified)

CHANGING BELT ON SCREEN PLANT, KNIFE SLIPPED ANDCUT SMALL FINGER RIGHT HAND, 6 STITCHES.

1994 · 1 incident

July 20, 1994 ND · Metal/Non-Metal ledgeman/hand, quarry man POWERED HAULAGE
Strata Corporation · Struck against a moving object

LOW BACK INJURY, SPRAIN AGGREVATED BY CONTINUOUS LOADER OPERATION SEAT VIBRATION.

1992 · 1 incident

August 27, 1992 ND · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer FALLING/SLIDING/ROLLING MATERIALS
Strata Corporation · Caught in, under or between collapsing material or buildings

95450MOVING MATERIAL WITH A D-8N. SPOTTED AND DISMOUNTED MACHINE ON RIGHT SIDE(BANK). BANK COLLAPSED AND TRAPPED INDV BETWEEN BANK AND LEFT ARM OF BLADE. INDV DUG OUT AND SOUGHT HELP. BROKEN 35630LEG,PIN INSERTED.