Mining Incidents

Plant 1: 36 MSHA citations Metal/Non-Metal

Johner Gravel, Inc. · Surface
Spearfish, Lawrence County, SD  ·  Intermittent
MSHA Mine ID: 3901534

Plant 1 has $6K 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 2009
36
citations
10
significant & substantial
$5,677
proposed penalties
$5,677
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2009
31
inspections on record
293
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: 293 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 1 has $6K 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.
$6K
proposed penalties
$6K
current assessed
$6K
paid to date
$0
outstanding
36 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-10-15.
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.
27.8%
significant & substantial
2.8%
high negligence or reckless
27.8%
reasonably likely or greater
55.6%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 13.9% low, 83.3% moderate, 2.8% 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: 2024-09-17
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
2024-09-17 Unlisted Particulate, respirable, <1% Qtz 0.14 Crusher Oper/Worker
2020-03-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-03-25 Respirable dust, <.1mg 0 Grizzly Man
2013-12-17 Respirable dust, <.1mg 0 Front-end Loader Operator
2013-12-17 Respirable dust, <.1mg 0 Backhoe Operator
2009-09-30 Quartz, respirable, >1% Qtz 0.6 0.83 0.72 Front-end Loader Operator
2009-09-30 Quartz, respirable, >1% Qtz 0.52 0.88 0.59 Front-end Loader Operator

Area samples (mill and shop air)

Last sampled: 2016-05-18, 10 years ago
1
samples
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Area sampled
2016-05-18 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. Johner & Sons Earthmoving 2009 to 2014
  2. Johner Gravel, Inc. 2015 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 3
2025 3
2024 2
2023 2
2022 3
2021 3
2020 3
2019 2
2018 2
2017 5
2016 5
2015 4
2014 3
2013 3
2012 3
2011 3
2010 3
2009 4
Source: MSHA quarterly employment and production, updated weekly.

Plant 1 sits in Lawrence County, South Dakota, where the Census mining category is 2.1% 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.
Lawrence County, South Dakota · Population 26,574
2.1%
Mining share of county employment
$66,766
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 34 0 0 0.0
2026 Q1 386 0 0 0.0
2025 Q4 276 3 1 10869.6
2025 Q3 472 0 0 0.0
2025 Q2 167 0 0 0.0
2025 Q1 174 0 0 0.0
2024 Q4 77 1 0 12987.0
2024 Q3 283 0 0 0.0
Show 61 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 253 2 0 7905.1
2024 Q1 271 0 0 0.0
2023 Q4 175 0 0 0.0
2023 Q3 412 2 0 4854.4
2023 Q2 271 0 0 0.0
2023 Q1 40 0 0 0.0
2022 Q4 82 0 0 0.0
2022 Q3 153 0 0 0.0
2022 Q2 23 0 0 0.0
2022 Q1 254 1 0 3937.0
2021 Q4 42 0 0 0.0
2021 Q3 259 0 0 0.0
2021 Q2 169 0 0 0.0
2021 Q1 282 0 0 0.0
2020 Q4 289 0 0 0.0
2020 Q3 72 0 0 0.0
2020 Q2 135 0 0 0.0
2020 Q1 163 1 0 6135.0
2019 Q4 3 0 0 0.0
2019 Q3 134 0 0 0.0
2019 Q2 117 0 0 0.0
2019 Q1 35 3 0 85714.3
2018 Q4 50 0 0 0.0
2018 Q3 92 0 0 0.0
2018 Q2 178 0 0 0.0
2018 Q1 14 0 0 0.0
2017 Q4 10 0 0 0.0
2017 Q3 750 0 0 0.0
2017 Q2 429 3 1 6993.0
2017 Q1 178 0 0 0.0
2016 Q4 259 2 0 7722.0
2016 Q3 477 0 0 0.0
2016 Q2 441 8 3 18140.6
2016 Q1 432 0 0 0.0
2015 Q4 419 0 0 0.0
2015 Q3 433 0 0 0.0
2015 Q2 391 0 0 0.0
2015 Q1 326 0 0 0.0
2014 Q4 188 0 0 0.0
2014 Q3 467 0 0 0.0
2014 Q2 446 0 0 0.0
2014 Q1 55 0 0 0.0
2013 Q4 180 1 0 5555.6
2013 Q3 552 0 0 0.0
2013 Q2 327 0 0 0.0
2013 Q1 560 1 1 1785.7
2012 Q4 720 0 0 0.0
2012 Q3 800 0 0 0.0
2012 Q2 800 0 0 0.0
2012 Q1 560 1 0 1785.7
2011 Q4 560 0 0 0.0
2011 Q3 750 0 0 0.0
2011 Q2 178 0 0 0.0
2011 Q1 560 0 0 0.0
2010 Q4 380 1 0 2631.6
2010 Q3 1,050 0 0 0.0
2010 Q2 540 3 2 5555.6
2010 Q1 2 0 0 0.0
2009 Q4 132 0 0 0.0
2009 Q3 230 3 2 13043.5
2009 Q2 200 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.