Mining Incidents

Underwood Wash Plant: 45 MSHA citations Metal/Non-Metal

Controlled by Mark T Thorson
Ottertail, Otter Tail County, MN  ·  Intermittent
MSHA Mine ID: 2100857

Underwood Wash Plant has $4K 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 2001
45
citations
12
significant & substantial
$4,297
proposed penalties
$4,297
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
35
inspections on record
270
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: 270 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Underwood Wash Plant has $4K 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.
$4K
proposed penalties
$4K
current assessed
$4K
paid to date
$0
outstanding
44 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2016-06-21.
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.
26.7%
significant & substantial
4.4%
high negligence or reckless
26.7%
reasonably likely or greater
46.7%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 24.4% low, 71.1% moderate, 4.4% 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: 2019-06-19, 7 years ago
2
samples
0
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz1
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (2)
Date Contaminant Concentration Limit Conc / limit Occupation
2019-06-19 Quartz, respirable, >1% Qtz 0.18 Washer Operator
2013-08-21 Unlisted Particulate, respirable, <1% Qtz 0.12 Washer 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. Mark Sand & Gravel Company 1950 to 2002
  2. Mark Sand & Gravel Company 2002 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 1
2025 2
2024 2
2023 2
2022 1
2021 1
2020 1
2019 1
2018 1
2017 2
2016 2
2015 2
2014 2
2013 2
2012 1
2011 1
2010 1
2009 1
2008 1
2007 1
2006 2
2005 3
2004 3
2003 3
2002 3
2001 6
2000 3
Source: MSHA quarterly employment and production, updated weekly.

Underwood Wash Plant 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 702 0 0 0.0
2026 Q1 0 0 0
2025 Q4 551 0 0 0.0
2025 Q3 717 0 0 0.0
2025 Q2 438 0 0 0.0
2025 Q1 0 0 0
2024 Q4 407 0 0 0.0
2024 Q3 1,504 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,016 0 0 0.0
2024 Q1 0 0 0
2023 Q4 327 0 0 0.0
2023 Q3 677 0 0 0.0
2023 Q2 578 0 0 0.0
2023 Q1 0 0 0
2022 Q4 323 0 0 0.0
2022 Q3 862 0 0 0.0
2022 Q2 312 0 0 0.0
2022 Q1 0 0 0
2021 Q4 362 0 0 0.0
2021 Q3 888 0 0 0.0
2021 Q2 819 0 0 0.0
2021 Q1 0 0 0
2020 Q4 120 0 0 0.0
2020 Q3 596 0 0 0.0
2020 Q2 502 0 0 0.0
2020 Q1 0 0 0
2019 Q4 213 0 0 0.0
2019 Q3 680 0 0 0.0
2019 Q2 348 0 0 0.0
2019 Q1 0 0 0
2018 Q4 123 0 0 0.0
2018 Q3 604 0 0 0.0
2018 Q2 465 0 0 0.0
2018 Q1 0 0 0
2017 Q4 247 0 0 0.0
2017 Q3 908 0 0 0.0
2017 Q2 949 0 0 0.0
2017 Q1 0 0 0
2016 Q4 557 0 0 0.0
2016 Q3 914 0 0 0.0
2016 Q2 721 1 0 1387.0
2016 Q1 0 0 0
2015 Q4 555 0 0 0.0
2015 Q3 974 0 0 0.0
2015 Q2 942 0 0 0.0
2015 Q1 0 0 0
2014 Q4 529 0 0 0.0
2014 Q3 1,204 7 4 5814.0
2014 Q2 608 0 0 0.0
2014 Q1 0 0 0
2013 Q4 398 0 0 0.0
2013 Q3 791 4 0 5056.9
2013 Q2 422 0 0 0.0
2013 Q1 0 0 0
2012 Q4 389 0 0 0.0
2012 Q3 664 6 2 9036.1
2012 Q2 236 0 0 0.0
2012 Q1 0 0 0
2011 Q4 449 0 0 0.0
2011 Q3 508 0 0 0.0
2011 Q2 175 0 0 0.0
2011 Q1 0 0 0
2010 Q4 294 2 1 6802.7
2010 Q3 1,482 0 0 0.0
2010 Q2 645 1 0 1550.4
2010 Q1 0 0 0
2009 Q4 277 0 0 0.0
2009 Q3 602 0 0 0.0
2009 Q2 391 1 0 2557.5
2009 Q1 0 0 0
2008 Q4 296 0 0 0.0
2008 Q3 438 0 0 0.0
2008 Q2 484 6 1 12396.7
2008 Q1 0 0 0
2007 Q4 473 0 0 0.0
2007 Q3 831 0 0 0.0
2007 Q2 485 0 0 0.0
2007 Q1 0 0 0
2006 Q4 573 0 0 0.0
2006 Q3 1,125 0 0 0.0
2006 Q2 863 0 0 0.0
2006 Q1 0 0 0
2005 Q4 682 3 0 4398.8
2005 Q3 1,047 0 0 0.0
2005 Q2 1,908 0 0 0.0
2005 Q1 1 0 0 0.0
2004 Q4 810 2 0 2469.1
2004 Q3 1,299 0 0 0.0
2004 Q2 870 0 0 0.0
2004 Q1 1 0 0 0.0
2003 Q4 398 2 1 5025.1
2003 Q3 1,086 0 0 0.0
2003 Q2 1,025 0 0 0.0
2003 Q1 1 0 0 0.0
2002 Q4 674 0 0 0.0
2002 Q3 966 0 0 0.0
2002 Q2 986 0 0 0.0
2002 Q1 1 0 0 0.0
2001 Q4 674 4 1 5934.7
2001 Q3 3,213 0 0 0.0
2001 Q2 2,164 5 2 2310.5
2001 Q1 1 0 0 0.0
2000 Q4 733 0 0 0.0
2000 Q3 1,500 0 0 0.0
2000 Q2 2,264 0 0 0.0
2000 Q1 1 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.