Inspection 349229963 OPENED OCT 12, 2026Open
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
No citations from this inspection so far.
Since 2018, OSHA inspectors have visited MP Mine Operations LLC in California 10 times.
The most recent inspection opened on Oct 12, 2026 as a planned inspection, in Mountain Pass and is still open.
In all, OSHA issued 40 citation items: 4 serious and 36 other-than-serious.
The penalties, $74,615 in total, stand where OSHA first set them.
The rule cited most here is 2473.1 (), 2 times.
Among mining and oil and gas employers, the typical cited inspection since 2015 ends with a $2,880 penalty. MP Mine Operations LLC averages $10,659 across 7 cited inspections.
Want to know if OSHA cites MP Mine Operations LLC again? Add it to a watchlist and we will email you the morning the citation shows up.
Watch this companyInspection history
Inspection 349129478 OPENED AUG 19, 2026Open
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
No citations from this inspection so far.
Inspection 348885211 OPENED APR 15, 2026Open
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 6964(A) |
Other-than-serious | $375 | $375 | Oct 5, 2026 | Contested |
| Citation 2, item 1 29 CFR 5002(C)(1) |
Serious | $18,000 | $18,000 | Oct 5, 2026 | Contested |
Inspection 348791922 OPENED FEB 20, 2026Open
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 342(A) |
Other-than-serious | $5,000 | $5,000 | Jun 18, 2026 | Contested |
Inspection 348646001 OPENED DEC 16, 2025Open
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 3340(C)(2)(A) |
Other-than-serious | $420 | $420 | May 11, 2026 | Contested |
| Citation 2, item 1 29 CFR 3203(A)(7) |
Serious | $18,000 | $18,000 | May 11, 2026 | Contested |
| Citation 3, item 1 29 CFR 3314(C) |
Serious | $18,000 | $18,000 | May 11, 2026 | Contested |
Inspection 348502196 OPENED SEP 8, 2025Open
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 3203(B)(1) |
Other-than-serious | $375 | $375 | Feb 27, 2026 | Contested |
| Citation 1, item 2 | Other-than-serious | $185 | $185 | Feb 27, 2026 | Contested |
| Citation 1, item 3 | Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 4 | Other-than-serious | $420 | $420 | Feb 27, 2026 | Contested |
| Citation 1, item 5 29 CFR 3241(C) |
Other-than-serious | $420 | $420 | Feb 27, 2026 | Contested |
| Citation 1, item 6 29 CFR 3270(B) |
Other-than-serious | $420 | $420 | Feb 27, 2026 | Contested |
| Citation 1, item 7 29 CFR 3272(C) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 8 29 CFR 3328(A)(2) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 9 29 CFR 3943(C) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 10 29 CFR 4002(A) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 11 29 CFR 4650(D) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 12 29 CFR 4650(E) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 13 29 CFR 5143(A)(5) |
Other-than-serious | $420 | $420 | Feb 27, 2026 | Contested |
| Citation 1, item 14 29 CFR 5164(C) |
Other-than-serious | $420 | $420 | Feb 27, 2026 | Contested |
| Citation 1, item 15 29 CFR 5194(F)(6) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 16 29 CFR 7014(F) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 1, item 17 29 CFR 7055(B) |
Other-than-serious | $280 | $280 | Feb 27, 2026 | Contested |
| Citation 2, item 1 29 CFR 3210(B) |
Serious | $5,060 | $5,060 | Feb 27, 2026 | Contested |
Inspection 345257034 OPENED APR 13, 2021Closed
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 4650(F) |
Other-than-serious | $200 | $200 | Jul 15, 2021 | Final |
| Citation 1, item 2 29 CFR 6151(C)(1) |
Other-than-serious | $200 | $200 | Jul 15, 2021 | Final |
Inspection 344391610 OPENED OCT 8, 2019Closed
67750 Bailey Road Hc1, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 | Other-than-serious | $300 | $300 | Jan 10, 2020 | Final |
| Citation 1, item 2 | Other-than-serious | $300 | $300 | Jan 10, 2020 | Final |
| Citation 1, item 3 29 CFR 3212(A)(2)(A) |
Other-than-serious | $200 | $200 | Jan 10, 2020 | Final |
| Citation 1, item 4 29 CFR 3366(D) |
Other-than-serious | $200 | $200 | Jan 10, 2020 | Final |
| Citation 1, item 5 29 CFR 7055(B) |
Other-than-serious | $300 | $300 | Jan 10, 2020 | Final |
| Citation 1, item 6 29 CFR 5048(J) |
Other-than-serious | $200 | $200 | Jan 10, 2020 | Final |
| Citation 1, item 7 29 CFR 5048(I)(5) |
Other-than-serious | $300 | $300 | Jan 10, 2020 | Final |
| Citation 1, item 8 29 CFR 5417(E) |
Other-than-serious | $300 | $300 | Jan 10, 2020 | Final |
| Citation 1, item 9 29 CFR 5162(A) |
Other-than-serious | $450 | $450 | Jan 10, 2020 | Final |
| Citation 1, item 10 29 CFR 3203(B)(2) |
Other-than-serious | $450 | $450 | Jan 10, 2020 | Final |
| Citation 1, item 11 | Other-than-serious | $0 | $0 | Jan 10, 2020 | Final |
2 older inspections
Inspection 343611885 OPENED NOV 20, 2018Closed
67750 Bailey Road, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
No citations from this inspection.
Inspection 343384632 OPENED AUG 14, 2018Closed
67750 Bailey Road, Mountain Pass, CA 92366 · All Other Nonmetallic Mineral Mining · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 3389(A) |
Other-than-serious | $225 | $225 | Aug 23, 2018 | Final |
| Citation 1, item 2 29 CFR 5162(A) |
Other-than-serious | $450 | $450 | Aug 23, 2018 | Final |
| Citation 1, item 3 | Other-than-serious | $225 | $225 | Aug 23, 2018 | Final |
The rules behind these citations
Current text from the Code of Federal Regulations. Some citations were issued under older wording.
Other all other nonmetallic mineral mining employers in California
- Holliday Rock Company, Inc. Upland · 101 citations · $57,357
- Lemoncove Granite, LLC Lemon Cove · 4 citations · $3,795
- Geo Drilling Fluids, Inc. Sacramento · 19 citations · $18,960
- National Cement Company of California, Inc. Lebec · 37 citations · $138,385
- The Don Chapin Co., Inc. Hollister · 28 citations · $9,470
- MCC Development Corporation Palmdale · 1 citation · $280
Source: U.S. Department of Labor, OSHA enforcement data. A citation is OSHA's allegation; employers can contest it, and the status column shows where each item stands. Something wrong on this page? Tell us.