Mammoth Valley Mining LLC Metal/Non-Metal
316 Mining, LLC
· Surface
Controlled by
Todd R Hoffman
Kougarok,
Nome County,
AK
·
Intermittent
MSHA Mine ID: 5002020
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2014
29
citations
6
significant & substantial
$5,011
proposed penalties
$4,168
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2025 Q4 | 0 | 0 | 0 | |
| 2025 Q3 | 4,300 | 0 | 0 | 0.0 |
| 2023 Q2 | 1,320 | 0 | 0 | 0.0 |
| 2023 Q1 | 0 | 0 | 0 | |
| 2022 Q4 | 0 | 0 | 0 | |
| 2022 Q3 | 9,480 | 0 | 0 | 0.0 |
| 2022 Q2 | 11,088 | 0 | 0 | 0.0 |
| 2021 Q4 | 1,770 | 0 | 0 | 0.0 |
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
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.