Mining Incidents

Portable Screener: 17 MSHA citations Metal/Non-Metal

Minnesota Dirt Works · Surface
Controlled by Daniel Ames
Lakeville, Dakota County, MN  ·  Intermittent
MSHA Mine ID: 2103990

Portable Screener has $2K 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 2020
17
citations
1
significant & substantial
$2,280
proposed penalties
$2,280
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2020
8
inspections on record
82
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: 82 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 Screener has $2K 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.
$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
17 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-05-28.
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.
5.9%
significant & substantial
0.0%
high negligence or reckless
5.9%
reasonably likely or greater
29.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 58.8% low, 41.2% 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: 2024-09-25
1
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg1
Show the individual readings (1)
Date Contaminant Concentration Limit Conc / limit Occupation
2024-09-25 Respirable dust, <.1mg 0 Dry Screen Plant 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. Minnesota Dirt Works 2020 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 1
2025 1
2024 1
2023 1
2022 2
2021 2
Source: MSHA quarterly employment and production, updated weekly.

Portable Screener sits in Dakota County, Minnesota, 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.
Dakota County, Minnesota · Population 442,204
0.0%
Mining share of county employment
$105,212
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 525 0 0 0.0
2026 Q1 40 0 0 0.0
2025 Q4 465 0 0 0.0
2025 Q3 620 0 0 0.0
2025 Q2 524 1 1 1908.4
2025 Q1 0 0 0
2024 Q4 550 0 0 0.0
2024 Q3 684 2 0 2924.0
Show 14 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 519 0 0 0.0
2024 Q1 0 0 0
2023 Q4 438 0 0 0.0
2023 Q3 660 2 0 3030.3
2023 Q2 518 0 0 0.0
2023 Q1 0 0 0
2022 Q4 499 0 0 0.0
2022 Q3 748 4 0 5347.6
2022 Q2 468 0 0 0.0
2022 Q1 60 0 0 0.0
2021 Q4 607 0 0 0.0
2021 Q3 600 0 0 0.0
2021 Q2 402 0 0 0.0
2021 Q1 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.