Key Takeaway
Mt Pass Mine & Mill is a active surface mine producing Metal, located in Primm, San Bernardino County, CA. It has 1,047 violations on record (212 S&S) and $752K in proposed penalties. Operated by MP Mine Operations, LLC..
Mt Pass Mine & Mill
Operator: MP Mine Operations, LLC.
Controller: MP Materials Corporation
Location: Primm, San Bernardino County, CA
Employees: 790
Recent Violations
View all 1,047 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 01/12/2026 | 56.12030 | S&S | HighNegligence | $0 |
| 01/07/2026 | 56.4602 | Non-S&S | ModNegligence | $336 |
| 01/07/2026 | 56.14107(a) | S&S | ModNegligence | $2,503 |
| 01/07/2026 | 47.41(a) | Non-S&S | ModNegligence | $336 |
| 01/07/2026 | 56.4201(a)(2) | Non-S&S | ModNegligence | $336 |
| 01/07/2026 | 56.14100(c) | Non-S&S | ModNegligence | $336 |
| 01/07/2026 | 47.41(a) | Non-S&S | ModNegligence | $336 |
| 01/07/2026 | Non-S&S | $0 | ||
| 01/07/2026 | 56.15005 | S&S | ModNegligence | $13,782 |
| 01/07/2026 | 45.4(b) | Non-S&S | ModNegligence | $151 |
| 01/06/2026 | 56.16003 | Non-S&S | HighNegligence | $1,431 |
| 01/06/2026 | 56.20003(a) | Non-S&S | HighNegligence | $1,431 |
| 01/06/2026 | 56.20014 | Non-S&S | HighNegligence | $2,133 |
| 01/06/2026 | 47.41(a) | Non-S&S | ModNegligence | $432 |
| 01/06/2026 | 56.18002(a) | S&S | ModNegligence | $2,133 |
| 01/06/2026 | 56.16001 | S&S | HighNegligence | $7,084 |
| 01/06/2026 | 48.27(a) | Non-S&S | ModNegligence | $168 |
| 01/06/2026 | 56.6202(a)(4) | Non-S&S | ModNegligence | $151 |
| 01/06/2026 | 48.29(a) | Non-S&S | ModNegligence | $151 |
| 01/06/2026 | 48.29(a) | Non-S&S | ModNegligence | $151 |
Accidents & Injuries
View all 194 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 01/25/2026 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | None |
| 01/03/2026 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | None |
| 12/31/2025 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 4d restricted |
| 12/26/2025 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 12/16/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 3d restricted |
| 11/13/2025 | MACHINERY | PERM TOT OR PERM PRTL DISABLTY | 29d lost, 1d restricted |
| 10/07/2025 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 10/03/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 23d restricted |
| 09/03/2025 | DISORDERS (REPEATED TRAUMA) | OCCUPATNAL ILLNESS NOT DEG 1-6 | None |
| 07/10/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | None |
Inspections
View all 199 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/05/2026 | 01/13/2026 | 121.75 | 3 |
| 01/05/2026 | 01/06/2026 | 1.00 | 1 |
| 11/12/2025 | 11/14/2025 | 16.00 | 1 |
| 09/04/2025 | 09/04/2025 | 9.00 | 1 |
| 08/07/2025 | 08/10/2025 | 12.00 | 1 |
| 07/16/2025 | 07/16/2025 | 5.75 | 1 |
| 06/30/2025 | 07/10/2025 | 133.75 | 4 |
| 06/12/2025 | 06/12/2025 | 9.50 | 1 |
| 05/20/2025 | 05/22/2025 | 22.25 | 1 |
| 04/07/2025 | 04/08/2025 | 13.25 | 1 |
Mine Details
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Frequently Asked Questions
How many MSHA violations does Mt Pass Mine & Mill have?
Mt Pass Mine & Mill has 1047 MSHA violations on record, of which 212 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $752K.
What type of mine is Mt Pass Mine & Mill?
Mt Pass Mine & Mill is a Surface mine producing Metal, located in Primm, San Bernardino County, CA. It currently has 790 employees.
Has anyone been injured or killed at Mt Pass Mine & Mill?
According to MSHA records, Mt Pass Mine & Mill has 194 reported accident/injury records and 0 fatalities on file.
Who operates Mt Pass Mine & Mill?
Mt Pass Mine & Mill is operated by MP Mine Operations, LLC. and controlled by MP Materials Corporation. MSHA Mine ID: 0402542.