Facility Info
364
Mountain Pass Mine
10/17/07 Rec'd a change of owner applications for all the permits currently under Union Oil Molycorp. The change is going from Union Oil Molycorp to Chevron Mining, Inc. The company/facility numbers will be staying the same. (005/0364) Barbara Weese
08-08-2017 Moved Companies From Molycorp Minerals, LLC(5) to MP Mine Operations LLC(2349)
| Permit Number | Permit Description | Equipment Description | Issue Date | Expiration Date | Action | |
|---|---|---|---|---|---|---|
| B013406 | BOILER, TEMPORARY MILL | Cleaver-Brooks Model CBLE700-600-250ST fire tube... | 02/02/2022 | 02/28/2023 |
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| B014167 | CONCENTRATE DRYER | N/A | 02/10/2026 | 02/28/2027 |
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| B014168 | CONCENTRATE DRYING CONVEYANCE SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014173 | LEACH CONVEYING SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014170 | CONCENTRATE CALCINING SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014219 | BRINE CRYSTALLIZER | N/A | 02/10/2026 | 02/28/2027 |
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| B014255 | LEACH THICKENING AND FILTRATION SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014285 | CONCENTRATE THICKENER AND FILTRATION SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014303 | PRASEODYMIUM NEODYMIUM THICKENER AND FILTRATION ... | N/A | 02/10/2026 | 02/28/2027 |
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| B014304 | PRASEODYMIUM NEODYMIUM DRYER | Dryer with burner rated at 7.2 MMBtu/hr. Ductin... | 02/10/2026 | 02/28/2027 |
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| B014305 | PRASEODYMIUM NEODYMIUM DRYING CONVEYANCE SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014307 | PRASEODYMIUM NEODYMIUM CALCINER | Calciner with burner rated at 4 MMBtu/hr. Ducti... | 02/10/2026 | 02/28/2027 |
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| B014308 | PRASEODYMIUM NEODYMIUM CALCINING CONVEYANCE SYST... | N/A | 02/10/2026 | 02/28/2027 |
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| B014310 | PRASEODYMIUM NEODYMIUM PACKAGING SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014388 | LANTHANUM CARBONATE DRYER | Dryer with two burners rated at 8.2 MMBtu/hr eac... | 02/10/2026 | 02/28/2027 |
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| B014390 | LANTHANUM CARBONATE DRYER SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014391 | LANTHANUM CARBONATE PACKAGING SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014413 | OXALIC ACID SYSTEM #1 | N/A | 02/10/2026 | 02/28/2027 |
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| B014415 | OXALIC ACID SYSTEM #2 | N/A | 02/10/2026 | 02/28/2027 |
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| B014417 | SODA ASH SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014418 | DIATOMACEOUS EARTH SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014420 | LEACH PRESSURE LEAF FILTER SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014422 | SX FEED PREP PRESSURE LEAF FILTER SYSTEM | N/A | 02/10/2026 | 02/28/2027 |
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| B014579 | DIATOMACEOUS EARTH LEAF FILTER PRE-COAT HOPPER | N/A | 02/10/2026 | 02/28/2027 |
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| B015487 | CRUSHING SYSTEM, PRIMARY | All equipment capacities are in horsepower (hp).... | 05/11/2026 | 02/28/2027 |
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