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#162B Roadrunner: 2 MSHA citations Metal/Non-Metal

CARVER, Carver County, MN  ·  Intermittent
MSHA Mine ID: 2103880

#162B Roadrunner has $261 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
2024
Latest incident
Jun 2024
Compliance record
MSHA citations since 2018
2
citations
0
significant & substantial
$261
proposed penalties
$261
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Wm. Mueller & Sons, Inc's full MSHA compliance history →
Inspection activity
MSHA inspections since 2016
12
inspections on record
61
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: 61 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

#162B Roadrunner has $261 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.
$261
proposed penalties
$261
current assessed
$261
paid to date
$0
outstanding
2 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2023-10-18.
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.
0.0%
significant & substantial
0.0%
high negligence or reckless
0.0%
reasonably likely or greater
100.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 50.0% low, 50.0% moderate, 0.0% 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: 2026-01-07
4
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg4
Show the individual readings (4)
Date Contaminant Concentration Limit Conc / limit Occupation
2026-01-07 Respirable dust, <.1mg 0 Front-end Loader Operator
2025-06-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-06-02 Respirable dust, <.1mg 0 Screen/Scalper Operator
2016-11-08 Respirable dust, <.1mg 0 Front-end Loader 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. Wm. Mueller & Sons, Inc 2016 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 2
2025 2
2024 2
2023 2
2022 2
2021 0
2020 3
2019 3
2018 4
2017 6
2016 5
Source: MSHA quarterly employment and production, updated weekly.

#162B Roadrunner sits in Carver 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.
Carver County, Minnesota · Population 108,622
0.1%
Mining share of county employment
$123,144
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 Q1 77 0 0 0.0
2025 Q4 152 0 0 0.0
2025 Q3 183 0 0 0.0
2025 Q2 242 0 0 0.0
2025 Q1 120 0 0 0.0
2024 Q4 333 0 0 0.0
2024 Q3 450 0 0 0.0
2024 Q2 290 0 0 0.0
Show 33 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q1 9 0 0 0.0
2023 Q4 216 1 0 4629.6
2023 Q3 210 0 0 0.0
2023 Q2 117 0 0 0.0
2023 Q1 135 0 0 0.0
2022 Q4 91 0 0 0.0
2022 Q3 233 0 0 0.0
2022 Q2 182 0 0 0.0
2022 Q1 0 0 0
2021 Q4 0 0 0
2021 Q3 0 0 0
2021 Q2 0 0 0
2021 Q1 0 0 0
2020 Q4 16 0 0 0.0
2020 Q3 32 0 0 0.0
2020 Q2 143 0 0 0.0
2020 Q1 9 0 0 0.0
2019 Q4 749 0 0 0.0
2019 Q3 546 0 0 0.0
2019 Q2 436 0 0 0.0
2019 Q1 0 0 0
2018 Q4 349 0 0 0.0
2018 Q3 704 0 0 0.0
2018 Q2 1,234 1 0 810.4
2018 Q1 427 0 0 0.0
2017 Q4 227 0 0 0.0
2017 Q3 290 0 0 0.0
2017 Q2 441 0 0 0.0
2017 Q1 18 0 0 0.0
2016 Q4 191 0 0 0.0
2016 Q3 428 0 0 0.0
2016 Q2 97 0 0 0.0
2016 Q1 96 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2024 · 1 incident

June 26, 2024 MN · Metal/Non-Metal outside foreman, leadman ELECTRICAL
Wm. Mueller & Sons, Inc · Contact with electrical current

REMOTE GRIZZLY WAS NOT WORKING ON SCREENING PLANT. TESTING 12 VOLT BATTERY. HAD A PINCHED CORD THAT GAVE A JOLT.