Mining Incidents

K400: 19 MSHA citations Metal/Non-Metal

TNT Construction Group, LLC · Surface
Controlled by Janet Hammerlund
Grand Rapids, Itasca County, MN  ·  Intermittent
MSHA Mine ID: 2103705

K400 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 2010
19
citations
4
significant & substantial
$2,409
proposed penalties
$2,409
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2010
18
inspections on record
176
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: 176 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

K400 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
19 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-11-18.
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.
21.1%
significant & substantial
0.0%
high negligence or reckless
21.1%
reasonably likely or greater
47.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 15.8% low, 84.2% 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: 2024-09-17
0%
of limit-tested samples over the exposure limit
4
samples
3
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz4
Show the individual readings (4)
Date Contaminant Concentration Limit Conc / limit Occupation
2024-09-17 Quartz, respirable, >1% Qtz 0.2 Front-end Loader Operator
2024-09-17 Quartz, respirable, >1% Qtz 0.42 1.01 0.42 Crusher Oper/Worker
2014-06-04 Quartz, respirable, >1% Qtz 0.34 0.65 0.52 Crusher Oper/Worker
2014-06-04 Quartz, respirable, >1% Qtz 0.34 0.59 0.58 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. Hammerlund Construction 2010 to 2023
  2. TNT Construction Group, LLC 2023 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 7
2025 3
2024 5
2023 2
2022 2
2021 4
2020 2
2019 3
2018 2
2017 2
2016 2
2015 2
2014 3
2013 2
2012 2
2011 1
2010 2
Source: MSHA quarterly employment and production, updated weekly.

K400 sits in Itasca County, Minnesota, where the Census mining category is 1.5% 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.
Itasca County, Minnesota · Population 45,141
1.5%
Mining share of county employment
$66,380
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 6,524 0 0 0.0
2026 Q1 0 0 0
2025 Q4 621 0 0 0.0
2025 Q3 2,133 0 0 0.0
2025 Q2 1,724 0 0 0.0
2025 Q1 0 0 0
2024 Q4 1,559 1 0 641.4
2024 Q3 3,532 1 0 283.1
Show 56 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 3,725 0 0 0.0
2024 Q1 0 0 0
2023 Q4 692 0 0 0.0
2023 Q3 2,226 0 0 0.0
2023 Q2 942 0 0 0.0
2023 Q1 0 0 0
2022 Q4 501 0 0 0.0
2022 Q3 1,456 0 0 0.0
2022 Q2 950 0 0 0.0
2022 Q1 0 0 0
2021 Q4 723 0 0 0.0
2021 Q3 2,675 0 0 0.0
2021 Q2 2,972 0 0 0.0
2021 Q1 0 0 0
2020 Q4 221 0 0 0.0
2020 Q3 487 0 0 0.0
2020 Q2 1,268 0 0 0.0
2020 Q1 0 0 0
2019 Q4 1,669 1 0 599.2
2019 Q3 3,233 0 0 0.0
2019 Q2 708 1 1 1412.4
2019 Q1 0 0 0
2018 Q4 2,079 0 0 0.0
2018 Q3 1,216 0 0 0.0
2018 Q2 563 0 0 0.0
2018 Q1 0 0 0
2017 Q4 913 1 0 1095.3
2017 Q3 1,226 2 0 1631.3
2017 Q2 359 0 0 0.0
2017 Q1 0 0 0
2016 Q4 551 0 0 0.0
2016 Q3 1,762 0 0 0.0
2016 Q2 1,315 0 0 0.0
2016 Q1 0 0 0
2015 Q4 628 0 0 0.0
2015 Q3 1,285 1 0 778.2
2015 Q2 0 0 0
2015 Q1 245 0 0 0.0
2014 Q4 1,455 0 0 0.0
2014 Q3 2,807 0 0 0.0
2014 Q2 1,778 3 1 1687.3
2014 Q1 0 0 0
2013 Q4 582 0 0 0.0
2013 Q3 1,359 0 0 0.0
2013 Q2 405 0 0 0.0
2013 Q1 0 0 0
2012 Q4 849 0 0 0.0
2012 Q3 1,901 2 0 1052.1
2012 Q2 1,306 0 0 0.0
2012 Q1 0 0 0
2011 Q4 1,736 0 0 0.0
2011 Q3 1,330 0 0 0.0
2011 Q2 796 5 1 6281.4
2011 Q1 0 0 0
2010 Q4 1,046 0 0 0.0
2010 Q3 1,382 1 1 723.6

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.