Mining Incidents

Inertia: 52 MSHA citations Metal/Non-Metal

Atteberry Construction Inc. · Surface
Colome, Tripp County, SD  ·  Intermittent
MSHA Mine ID: 3901489

Inertia has $7K in proposed MSHA penalties and $0 outstanding across 2 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
52
citations
19
significant & substantial
$6,987
proposed penalties
$6,914
paid to date
99% of proposed penalties paid to date, a $73 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2004
40
inspections on record
555
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: 555 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Inertia has $7K in proposed MSHA penalties and $0 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.
$7K
proposed penalties
$7K
current assessed
$7K
paid to date
$0
outstanding
51 assessments are final orders; 2 contested dockets.
Of $401 in penalties contested before the Commission, $328 was upheld in final decisions.
As of the most recent assessment on 2024-06-12.
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.
37.3%
significant & substantial
3.9%
high negligence or reckless
37.3%
reasonably likely or greater
68.6%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 5.9% low, 90.2% moderate, 3.9% 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 · 4% of citations on record
  • Settled 1 · 50%
  • Stood as issued 1 · 50%
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%
18%
Penalty reduction in decided contests
$401 proposed, $328 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 2010-02-12.
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 2010-427M Settlement Lesnick 2010 $293 → $220
CENT 2010-446M Dismissal Lesnick 2010 $108 → $108
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: 2025-03-20
0%
of limit-tested samples over the exposure limit
7
samples
2
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg4
  • Quartz, respirable, >1% Qtz2
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (7)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-03-20 Respirable dust, <.1mg 0 Backhoe Operator
2020-12-02 Unlisted Particulate, respirable, <1% Qtz 0.16 Front-end Loader Operator
2013-01-23 Respirable dust, <.1mg 0 Laborer, Bullgang
2013-01-23 Respirable dust, <.1mg 0 Front-end Loader Operator
2013-01-23 Quartz, respirable, >1% Qtz 0.14 1.58 0.09 Front-end Loader Operator
2009-09-02 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-09-02 Quartz, respirable, >1% Qtz 0.14 0.95 0.15 Front-end Loader Operator

Area samples (mill and shop air)

Last sampled: 2017-04-13, 9 years ago
1
samples
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Area sampled
2017-04-13 Respirable dust, <.1mg 0 SF ACTIVE MINING
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. Atteberry Construction Inc. 2004 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 2
2025 1
2024 2
2023 2
2022 2
2021 2
2020 3
2019 2
2018 3
2017 2
2016 3
2015 3
2014 2
2013 6
2012 3
2011 2
2010 2
2009 3
2008 2
2007 3
2006 3
2005 5
2004 4
Source: MSHA quarterly employment and production, updated weekly.

Inertia sits in Tripp County, South Dakota, where the Census mining category is 0.0% 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.
Tripp County, South Dakota · Population 5,607
0.0%
Mining share of county employment
$58,854
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 43 0 0 0.0
2026 Q1 61 0 0 0.0
2025 Q4 81 0 0 0.0
2025 Q3 149 0 0 0.0
2025 Q2 94 0 0 0.0
2025 Q1 529 0 0 0.0
2024 Q4 648 0 0 0.0
2024 Q3 119 0 0 0.0
Show 81 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 84 1 0 11904.8
2024 Q1 174 0 0 0.0
2023 Q4 84 0 0 0.0
2023 Q3 181 0 0 0.0
2023 Q2 271 2 0 7380.1
2023 Q1 719 0 0 0.0
2022 Q4 79 0 0 0.0
2022 Q3 536 0 0 0.0
2022 Q2 55 3 0 54545.5
2022 Q1 550 0 0 0.0
2021 Q4 1,107 4 2 3613.4
2021 Q3 1,339 0 0 0.0
2021 Q2 1,171 1 0 854.0
2021 Q1 671 0 0 0.0
2020 Q4 1,012 3 0 2964.4
2020 Q3 943 0 0 0.0
2020 Q2 615 0 0 0.0
2020 Q1 478 0 0 0.0
2019 Q4 720 3 0 4166.7
2019 Q3 895 2 0 2234.6
2019 Q2 1,045 0 0 0.0
2019 Q1 0 0 0
2018 Q4 1,151 0 0 0.0
2018 Q3 1,418 0 0 0.0
2018 Q2 933 0 0 0.0
2018 Q1 164 0 0 0.0
2017 Q4 472 2 1 4237.3
2017 Q3 705 0 0 0.0
2017 Q2 322 3 1 9316.8
2017 Q1 618 4 0 6472.5
2016 Q4 602 0 0 0.0
2016 Q3 1,105 0 0 0.0
2016 Q2 774 0 0 0.0
2016 Q1 1,016 2 0 1968.5
2015 Q4 575 0 0 0.0
2015 Q3 1,075 0 0 0.0
2015 Q2 440 0 0 0.0
2015 Q1 1,224 0 0 0.0
2014 Q4 36 0 0 0.0
2014 Q3 358 0 0 0.0
2014 Q2 958 1 1 1043.8
2014 Q1 0 0 0
2013 Q4 2,573 0 0 0.0
2013 Q3 2,527 0 0 0.0
2013 Q2 648 0 0 0.0
2013 Q1 1,010 2 2 1980.2
2012 Q4 291 0 0 0.0
2012 Q3 614 0 0 0.0
2012 Q2 685 2 2 2919.7
2012 Q1 763 0 0 0.0
2011 Q4 1,327 0 0 0.0
2011 Q3 1,385 0 0 0.0
2011 Q2 867 3 2 3460.2
2011 Q1 0 0 0
2010 Q4 1,358 0 0 0.0
2010 Q3 1,359 0 0 0.0
2010 Q2 604 0 0 0.0
2010 Q1 0 0 0
2009 Q4 1,286 7 5 5443.2
2009 Q3 809 0 0 0.0
2009 Q2 300 0 0 0.0
2009 Q1 379 3 0 7915.6
2008 Q4 0 0 0
2008 Q3 152 0 0 0.0
2008 Q2 1,224 0 0 0.0
2008 Q1 762 0 0 0.0
2007 Q4 1,225 0 0 0.0
2007 Q3 1,799 0 0 0.0
2007 Q2 1,206 0 0 0.0
2007 Q1 450 0 0 0.0
2006 Q4 473 0 0 0.0
2006 Q3 1,094 0 0 0.0
2006 Q2 1,135 0 0 0.0
2006 Q1 812 0 0 0.0
2005 Q4 834 0 0 0.0
2005 Q3 1,952 0 0 0.0
2005 Q2 1,519 0 0 0.0
2005 Q1 1,375 0 0 0.0
2004 Q4 854 0 0 0.0
2004 Q3 784 0 0 0.0
2004 Q2 448 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.