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K500: 14 MSHA citations Metal/Non-Metal

Duluth, St Louis County, MN  ·  Intermittent
MSHA Mine ID: 2103893

K500 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
1
Years on record
2024
Latest incident
Jun 2024
Compliance record
MSHA citations since 2021
14
citations
1
significant & substantial
$1,841
proposed penalties
$1,841
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Mathy Const. Co. DBA Northland Constrs. of Duluth's full MSHA compliance history →
Inspection activity
MSHA inspections since 2016
14
inspections on record
94
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: 94 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

K500 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
12 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-04-09.
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.
7.1%
significant & substantial
0.0%
high negligence or reckless
7.1%
reasonably likely or greater
50.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 57.1% low, 42.9% 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: 2021-04-22, 5 years ago
0%
of limit-tested samples over the exposure limit
2
samples
2
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz2
Show the individual readings (2)
Date Contaminant Concentration Limit Conc / limit Occupation
2021-04-22 Quartz, respirable, >1% Qtz 0.15 0.44 0.34 Front-end Loader Operator
2021-04-22 Quartz, respirable, >1% Qtz 0.61 1.56 0.39 Crusher Oper/Worker
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. Northland Constructors of Duluth, LLC. 2016 to 2023
  2. Northland Constrs. of Duluth 2023 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 3
2025 2
2024 3
2023 4
2022 3
2021 3
2019 0
2018 1
2017 1
2016 3
Source: MSHA quarterly employment and production, updated weekly.

K500 sits in St. Louis County, Minnesota, where the Census mining category is 2.3% 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.
St. Louis County, Minnesota · Population 200,056
2.3%
Mining share of county employment
$69,455
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 1,174 0 0 0.0
2026 Q1 24 0 0 0.0
2025 Q4 1,060 0 0 0.0
2025 Q3 1,501 0 0 0.0
2025 Q2 974 2 0 2053.4
2025 Q1 1 0 0 0.0
2024 Q4 66 0 0 0.0
2024 Q3 3,294 0 0 0.0
Show 25 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 2,368 2 0 844.6
2024 Q1 477 0 0 0.0
2023 Q4 615 0 0 0.0
2023 Q3 2,661 0 0 0.0
2023 Q2 2,352 2 0 850.3
2023 Q1 1,330 0 0 0.0
2022 Q4 401 0 0 0.0
2022 Q3 1,092 4 0 3663.0
2022 Q2 286 0 0 0.0
2022 Q1 346 0 0 0.0
2021 Q4 944 0 0 0.0
2021 Q3 910 0 0 0.0
2021 Q2 947 2 1 2111.9
2019 Q2 0 0 0
2019 Q1 0 0 0
2018 Q4 0 0 0
2018 Q3 0 0 0
2018 Q2 482 0 0 0.0
2018 Q1 0 0 0
2017 Q4 0 0 0
2017 Q3 680 0 0 0.0
2017 Q2 142 0 0 0.0
2017 Q1 0 0 0
2016 Q4 340 0 0 0.0
2016 Q3 655 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2024 · 1 incident

June 24, 2024 MN · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Northland Constrs. of Duluth · Struck by... (Not Elsewhere Classified)

Employees were performing maintenance on a crusher screen. One employee inadvertently struck partners finger with a hammer while installing screen clamp bolts. The injured employee has an open fracture of the left middle distal phalange.