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Plant-6: 115 MSHA citations Metal/Non-Metal

Controlled by Mark T Thorson
Ottertail, Otter Tail County, MN  ·  Intermittent
MSHA Mine ID: 2103145

Plant-6 has $18K in proposed MSHA penalties and $2K outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
2
Years on record
2007
Latest incident
Jul 2007
Compliance record
MSHA citations since 2001
115
citations
43
significant & substantial
$18,384
proposed penalties
$16,595
paid to date
90% of proposed penalties paid to date, a $1,789 gap.
Source: MSHA violations data, updated weekly.
See Mark Sand & Gravel Co.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2001
38
inspections on record
462
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: 462 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Plant-6 has $18K in proposed MSHA penalties and $2K 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.
$18K
proposed penalties
$18K
current assessed
$17K
paid to date
$2K
outstanding
106 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-07-07.
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.
37.4%
significant & substantial
1.7%
high negligence or reckless
37.4%
reasonably likely or greater
61.7%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 19.1% low, 79.1% moderate, 1.7% 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: 2025-07-15
0%
of limit-tested samples over the exposure limit
9
samples
6
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz7
  • Respirable dust, <.1mg2
Show the individual readings (9)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-07-15 Quartz, respirable, >1% Qtz 0.19 1.1 0.17 Lab Technician
2025-07-15 Quartz, respirable, >1% Qtz 0.17 Crusher Oper/Worker
2016-07-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-07-27 Quartz, respirable, >1% Qtz 0.46 0.75 0.61 Crusher Oper/Worker
2010-06-30 Quartz, respirable, >1% Qtz 0.48 0.84 0.57 Crusher Oper/Worker
2010-06-30 Quartz, respirable, >1% Qtz 0.32 0.61 0.52 Front-end Loader Operator
2007-04-25 Quartz, respirable, >1% Qtz 0.22 0.85 0.26 Crusher Oper/Worker
2007-04-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2001-05-02 Quartz, respirable, >1% Qtz 0.56 3.25 0.17 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. Mark Sand & Gravel Co. 1997 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 1
2025 2
2024 2
2023 2
2022 2
2021 2
2020 2
2019 2
2018 2
2017 2
2016 2
2015 2
2014 2
2013 2
2012 2
2011 2
2010 2
2009 2
2008 2
2007 2
2006 2
2005 2
2004 3
2003 3
2002 2
2001 3
2000 4
Source: MSHA quarterly employment and production, updated weekly.

Plant-6 sits in Otter Tail County, Minnesota, 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.
Otter Tail County, Minnesota · Population 60,281
0.1%
Mining share of county employment
$70,912
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 1,505 0 0 0.0
2026 Q1 0 0 0
2025 Q4 628 0 0 0.0
2025 Q3 1,167 5 1 4284.5
2025 Q2 1,025 0 0 0.0
2025 Q1 0 0 0
2024 Q4 726 0 0 0.0
2024 Q3 1,210 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,246 0 0 0.0
2024 Q1 26 0 0 0.0
2023 Q4 625 0 0 0.0
2023 Q3 1,239 4 2 3228.4
2023 Q2 806 0 0 0.0
2023 Q1 0 0 0
2022 Q4 515 0 0 0.0
2022 Q3 1,173 0 0 0.0
2022 Q2 964 0 0 0.0
2022 Q1 0 0 0
2021 Q4 660 6 2 9090.9
2021 Q3 1,294 0 0 0.0
2021 Q2 1,909 0 0 0.0
2021 Q1 0 0 0
2020 Q4 887 1 0 1127.4
2020 Q3 1,190 0 0 0.0
2020 Q2 1,244 3 2 2411.6
2020 Q1 0 0 0
2019 Q4 639 0 0 0.0
2019 Q3 2,676 0 0 0.0
2019 Q2 1,342 5 1 3725.8
2019 Q1 0 0 0
2018 Q4 477 0 0 0.0
2018 Q3 1,885 5 1 2652.5
2018 Q2 1,074 0 0 0.0
2018 Q1 0 0 0
2017 Q4 521 0 0 0.0
2017 Q3 2,301 0 0 0.0
2017 Q2 1,623 4 2 2464.6
2017 Q1 0 0 0
2016 Q4 1,005 0 0 0.0
2016 Q3 1,668 11 7 6594.7
2016 Q2 1,390 0 0 0.0
2016 Q1 20 0 0 0.0
2015 Q4 1,215 0 0 0.0
2015 Q3 1,415 6 4 4240.3
2015 Q2 473 0 0 0.0
2015 Q1 61 0 0 0.0
2014 Q4 777 0 0 0.0
2014 Q3 1,472 0 0 0.0
2014 Q2 1,205 0 0 0.0
2014 Q1 0 0 0
2013 Q4 1,456 2 0 1373.6
2013 Q3 1,736 0 0 0.0
2013 Q2 970 0 0 0.0
2013 Q1 0 0 0
2012 Q4 985 1 0 1015.2
2012 Q3 1,118 0 0 0.0
2012 Q2 1,722 0 0 0.0
2012 Q1 613 0 0 0.0
2011 Q4 1,221 14 6 11466.0
2011 Q3 1,536 0 0 0.0
2011 Q2 1,315 0 0 0.0
2011 Q1 0 0 0
2010 Q4 610 3 3 4918.0
2010 Q3 935 0 0 0.0
2010 Q2 1,315 2 1 1520.9
2010 Q1 0 0 0
2009 Q4 1,066 0 0 0.0
2009 Q3 1,572 0 0 0.0
2009 Q2 844 0 0 0.0
2009 Q1 0 0 0
2008 Q4 957 4 0 4179.7
2008 Q3 738 4 2 5420.1
2008 Q2 891 4 1 4489.3
2008 Q1 0 0 0
2007 Q4 923 0 0 0.0
2007 Q3 2,010 0 0 0.0
2007 Q2 1,018 4 1 3929.3
2007 Q1 0 0 0
2006 Q4 892 0 0 0.0
2006 Q3 1,832 0 0 0.0
2006 Q2 1,312 7 5 5335.4
2006 Q1 0 0 0
2005 Q4 535 0 0 0.0
2005 Q3 1,871 0 0 0.0
2005 Q2 1,394 1 0 717.4
2005 Q1 1 0 0 0.0
2004 Q4 824 0 0 0.0
2004 Q3 1,362 0 0 0.0
2004 Q2 901 0 0 0.0
2004 Q1 1 0 0 0.0
2003 Q4 1,287 3 0 2331.0
2003 Q3 1,475 0 0 0.0
2003 Q2 820 0 0 0.0
2003 Q1 1 0 0 0.0
2002 Q4 778 0 0 0.0
2002 Q3 1,300 0 0 0.0
2002 Q2 737 4 0 5427.4
2002 Q1 1 0 0 0.0
2001 Q4 478 0 0 0.0
2001 Q3 2,133 0 0 0.0
2001 Q2 1,074 3 0 2793.3
2001 Q1 1 0 0 0.0
2000 Q4 690 0 0 0.0
2000 Q3 1,168 0 0 0.0
2000 Q2 1,335 0 0 0.0
2000 Q1 119 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

2 on file

2007 · 2 incidents

July 5, 2007 MN · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer MACHINERY
Mark Sand & Gravel Co. · Struck by flying object

Employee was working under conveyor and grinding. He remembers his right eye being irritated at the time but did not report the incident until 7-23-07 since it had not cleared up on its own.

May 11, 2007 MN · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Mark Sand & Gravel Co. · Fall from machine

Employee fell from front end loader ladder while dismounting loader. He fell backwards and injured lower back.