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Portable #110: 92 MSHA citations Metal/Non-Metal

Controlled by Tom E Lien Jr
Rapid City, Pennington County, SD  ·  Active
MSHA Mine ID: 3901577

Portable #110 has $16K 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
1
Years on record
2013
Latest incident
Mar 2013
Compliance record
MSHA citations since 2012
92
citations
18
significant & substantial
$15,830
proposed penalties
$15,830
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Western Construction, Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2012
43
inspections on record
508
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: 508 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Portable #110 has $16K 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.
$16K
proposed penalties
$16K
current assessed
$16K
paid to date
$0
outstanding
84 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-02-24.
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.
21.2%
significant & substantial
4.7%
high negligence or reckless
21.2%
reasonably likely or greater
64.7%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 8.2% low, 87.1% moderate, 4.7% 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: 2025-01-02
25%
of limit-tested samples over the exposure limit
13
samples
4
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz41 over
  • Respirable dust, <.1mg9
Show the individual readings (13)
Date Contaminant Concentration Limit Conc / limit Occupation
2013-09-18 Quartz, respirable, >1% Qtz 1.22 0.32 3.81 Laborer, Bullgang
2025-01-02 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-01-02 Respirable dust, <.1mg 0 Supervisor, Co. Official
2025-01-02 Respirable dust, <.1mg 0 Backhoe Operator
2025-01-02 Quartz, respirable, >1% Qtz 0.21 0.84 0.25 Utility Man
2023-09-26 Respirable dust, <.1mg 0 Truck Driver
2023-09-26 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-09-26 Respirable dust, <.1mg 0 Shovel Operator
2023-09-26 Respirable dust, <.1mg 0 Truck Driver
2021-08-10 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-06-01 Quartz, respirable, >1% Qtz 0.58 3.06 0.19 Front-end Loader Operator
2017-06-01 Quartz, respirable, >1% Qtz 0.71 2.11 0.34 Crusher Oper/Worker
2013-09-18 Respirable dust, <.1mg 0 Front-end Loader Operator

Area samples (mill and shop air)

Last sampled: 2015-11-02, 10 years ago
1
samples
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Area sampled
2015-11-02 Respirable dust, <.1mg 0 SF ORE TRANSFER
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.

Portable #110 recorded 0.00 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
ⓘ This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
Below average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In South Dakota, metal and nonmetal mining averaged 2.39 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2025 * 0.00 0.00 0.000
2024 * 0.00 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
2019 * 0.00 0.00 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. Western Construction, Inc. 2011 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 8
2025 8
2024 9
2023 7
2022 8
2021 7
2020 9
2019 7
2018 5
2017 6
2016 5
2015 5
2014 5
2013 4
2012 2
2011 3
Source: MSHA quarterly employment and production, updated weekly.

Portable #110 sits in Pennington County, South Dakota, where the Census mining category is 0.9% 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.
Pennington County, South Dakota · Population 112,081
0.9%
Mining share of county employment
$70,768
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 5,768 0 0 0.0
2026 Q1 4,760 2 0 420.2
2025 Q4 5,737 0 0 0.0
2025 Q3 5,334 8 1 1499.8
2025 Q2 6,181 0 0 0.0
2025 Q1 6,012 2 0 332.7
2024 Q4 6,963 2 2 287.2
2024 Q3 5,807 0 0 0.0
Show 51 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 4,929 0 0 0.0
2024 Q1 6,766 3 0 443.4
2023 Q4 4,538 0 0 0.0
2023 Q3 5,206 0 0 0.0
2023 Q2 6,022 6 1 996.3
2023 Q1 4,680 3 1 641.0
2022 Q4 5,270 0 0 0.0
2022 Q3 5,332 0 0 0.0
2022 Q2 6,070 2 1 329.5
2022 Q1 4,772 1 0 209.6
2021 Q4 5,773 0 0 0.0
2021 Q3 6,207 2 0 322.2
2021 Q2 5,003 0 0 0.0
2021 Q1 3,879 0 0 0.0
2020 Q4 6,181 0 0 0.0
2020 Q3 7,443 0 0 0.0
2020 Q2 7,902 0 0 0.0
2020 Q1 5,866 1 0 170.5
2019 Q4 5,363 0 0 0.0
2019 Q3 6,438 3 0 466.0
2019 Q2 6,604 1 0 151.4
2019 Q1 3,843 3 1 780.6
2018 Q4 2,164 0 0 0.0
2018 Q3 5,061 0 0 0.0
2018 Q2 1,393 10 2 7178.8
2018 Q1 3,191 0 0 0.0
2017 Q4 3,789 1 0 263.9
2017 Q3 4,080 0 0 0.0
2017 Q2 2,472 0 0 0.0
2017 Q1 2,878 4 0 1389.9
2016 Q4 2,771 0 0 0.0
2016 Q3 3,771 0 0 0.0
2016 Q2 1,951 0 0 0.0
2016 Q1 2,147 0 0 0.0
2015 Q4 4,156 7 3 1684.3
2015 Q3 3,343 0 0 0.0
2015 Q2 3,120 2 0 641.0
2015 Q1 2,830 0 0 0.0
2014 Q4 496 0 0 0.0
2014 Q3 3,116 0 0 0.0
2014 Q2 761 0 0 0.0
2014 Q1 2,815 0 0 0.0
2013 Q4 2,219 0 0 0.0
2013 Q3 3,163 23 5 7271.6
2013 Q2 3,251 0 0 0.0
2013 Q1 2,621 0 0 0.0
2012 Q4 74 0 0 0.0
2012 Q3 763 0 0 0.0
2012 Q2 1,171 2 1 1707.9
2012 Q1 0 1 0
2011 Q3 488 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2013 · 1 incident

March 26, 2013 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Western Construction, Inc. · Fall from machine

Miner was inspecting bearing on conveyor when he lost his footing, tripped and fell on the ground on his left flank/hip area and received bruises