| Case Number | Case Title | Open Date | Closed Date |
| 10-0830-EL-ECP | DUKE ENERGY OHIO INC | 06/15/2010 | |
| 11-2472-EL-ECP | DUKE ENERGY OHIO INC | 04/15/2011 | |
| 91-1778-EL-ECP | MONONGAHELA POWER COMPANY | 09/30/1991 | 06/18/1992 |
| 92-1172-EL-ECP | CINCINNATI GAS & ELECTRIC COMPANY | 06/30/1992 | 02/24/1994 |
| 92-1175-EL-ECP | DAYTON POWER & LIGHT COMPANY | 06/30/1992 | 05/06/1993 |
| 94-0809-EL-ECP | MONONGAHELA POWER COMPANY | 05/10/1994 | 02/16/1995 |
| 94-1181-EL-ECP | OHIO POWER COMPANY | 07/11/1994 | 03/23/1995 |