Grayhawk HP 400 Metal/Non-Metal
Controlled by
Mathy Construction Company
Duluth,
St Louis County,
MN
·
Intermittent
MSHA Mine ID: 2103843
Grayhawk HP 400 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 2015
17
citations
1
significant & substantial
$2,114
proposed penalties
$2,114
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2015
16
inspections on record
142
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: 142 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Grayhawk HP 400 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 2025-07-15.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also
the operator's enforcement record
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 |
|---|---|---|---|---|
| 2025 Q4 | 512 | 0 | 0 | 0.0 |
| 2025 Q3 | 1,192 | 1 | 0 | 838.9 |
| 2025 Q2 | 992 | 0 | 0 | 0.0 |
| 2025 Q1 | 1 | 0 | 0 | 0.0 |
| 2024 Q4 | 244 | 0 | 0 | 0.0 |
| 2024 Q3 | 953 | 1 | 0 | 1049.3 |
| 2024 Q2 | 771 | 0 | 0 | 0.0 |
| 2024 Q1 | 0 | 0 | 0 |
Show 37 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2023 Q4 | 22 | 0 | 0 | 0.0 |
| 2023 Q3 | 193 | 1 | 0 | 5181.3 |
| 2023 Q2 | 535 | 0 | 0 | 0.0 |
| 2023 Q1 | 0 | 0 | 0 | |
| 2022 Q4 | 497 | 0 | 0 | 0.0 |
| 2022 Q3 | 939 | 2 | 0 | 2129.9 |
| 2022 Q2 | 145 | 0 | 0 | 0.0 |
| 2022 Q1 | 0 | 0 | 0 | |
| 2021 Q4 | 189 | 0 | 0 | 0.0 |
| 2021 Q3 | 500 | 1 | 0 | 2000.0 |
| 2021 Q2 | 260 | 0 | 0 | 0.0 |
| 2021 Q1 | 0 | 0 | 0 | |
| 2020 Q4 | 421 | 0 | 0 | 0.0 |
| 2020 Q3 | 652 | 4 | 0 | 6135.0 |
| 2020 Q2 | 98 | 0 | 0 | 0.0 |
| 2020 Q1 | 0 | 0 | 0 | |
| 2019 Q4 | 365 | 0 | 0 | 0.0 |
| 2019 Q3 | 606 | 0 | 0 | 0.0 |
| 2019 Q2 | 1,700 | 0 | 0 | 0.0 |
| 2019 Q1 | 0 | 0 | 0 | |
| 2018 Q4 | 643 | 1 | 0 | 1555.2 |
| 2018 Q3 | 1,036 | 0 | 0 | 0.0 |
| 2018 Q2 | 690 | 0 | 0 | 0.0 |
| 2018 Q1 | 0 | 0 | 0 | |
| 2017 Q4 | 1,667 | 0 | 0 | 0.0 |
| 2017 Q3 | 1,279 | 3 | 1 | 2345.6 |
| 2017 Q2 | 1,534 | 0 | 0 | 0.0 |
| 2017 Q1 | 0 | 0 | 0 | |
| 2016 Q4 | 1,007 | 0 | 0 | 0.0 |
| 2016 Q3 | 1,553 | 1 | 0 | 643.9 |
| 2016 Q2 | 817 | 0 | 0 | 0.0 |
| 2016 Q1 | 0 | 0 | 0 | |
| 2015 Q4 | 909 | 0 | 0 | 0.0 |
| 2015 Q3 | 1,704 | 0 | 0 | 0.0 |
| 2015 Q2 | 894 | 2 | 0 | 2237.1 |
| 2015 Q1 | 0 | 0 | 0 | |
| 2014 Q4 | 492 | 0 | 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.
For insurers, brokers, and safety consultants
The full compliance file on Grayhawk HP 400
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.