Portable Crusher #1 Metal/Non-Metal
Knife River Corporation
· Surface
East Helena,
Lewis And Clark County,
MT
·
Intermittent
MSHA Mine ID: 2402312
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Email me when a new MSHA incident is filed at Portable Crusher #1.
- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2004
73
citations
14
significant & substantial
$7,749
proposed penalties
$7,749
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 | 1,873 | 0 | 0 | 0.0 |
| 2025 Q3 | 3,346 | 0 | 0 | 0.0 |
| 2025 Q2 | 2,620 | 0 | 0 | 0.0 |
| 2025 Q1 | 348 | 0 | 0 | 0.0 |
| 2024 Q4 | 1,578 | 0 | 0 | 0.0 |
| 2024 Q3 | 2,560 | 0 | 0 | 0.0 |
| 2024 Q2 | 1,569 | 0 | 0 | 0.0 |
| 2024 Q1 | 325 | 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.