| 068000097 | Southaven Energy Facility | Air-Acid Rain | 02/08/2000 | 10/10/2004 |
| 068000097 | KGen Southaven LLC | Air-Acid Rain | 10/11/2004 | 12/31/2004 |
| 068000097 | KGen Southaven LLC | Air-Acid Rain | 03/21/2005 | 11/10/2008 |
| 068000097 | AP Holdings Southaven LLC | Air-Acid Rain | 11/10/2008 | 11/10/2010 |
| 068000097 | Southaven Energy Facility | Air-Construction | 10/06/2000 | 10/11/2004 |
| 068000097 | KGen Southaven LLC | Air-Construction | 10/11/2004 | 10/05/2006 |
| 068000097 | BTEC Southaven LLC | Air-Construction | 10/05/2006 | |
| 068000119 | MZX Tech LLC | Air-Construction | 03/11/2026 | |
| 068000097 | Southaven Energy Facility | Air-State Operating | 10/06/2000 | 05/01/2003 |
| 068000097 | AP Holdings Southaven LLC | Air-Title V Operating | 11/10/2008 | 11/10/2010 |
| MSR101643 | Southaven Energy Facility | GP-Baseline | 10/06/2000 | 10/02/2002 |
| MSR109658 | MZX Tech LLC | GP-Construction | 10/10/2025 | 01/31/2027 |
| MSR000100867 | Duke Energy Southaven LLC | Hazardous Waste-EPA ID | 12/03/2001 | 11/08/2004 |
| MSR000100867 | KGen Southaven LLC | Hazardous Waste-EPA ID | 11/08/2004 | 09/29/2006 |
| MSR000100867 | BTEC Southaven LLC | Hazardous Waste-EPA ID | 09/29/2006 | |
| MSR000100867 | MZX Tech, LLC. Duke Facility | Hazardous Waste-EPA ID | 09/03/2026 | |
| MS0056529 | Southaven Energy Facility | Water-NPDES | 04/07/2000 | 03/27/2001 |
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