| Case Number | Case Title | Open Date | Closed Date |
| 06-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 01/12/2006 | 08/20/2010 |
| 06-0502-EL-FOR | COLUMBUS SOUTHERN POWER COMPANY | 01/12/2006 | 02/13/2008 |
| 06-0503-EL-FOR | CINERGY CORPORATION | 01/12/2006 | 02/13/2008 |
| 06-0504-EL-FOR | FIRSTENERGY CORPORATION | 01/12/2006 | 02/13/2008 |
| 06-0505-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 01/12/2006 | 08/27/2009 |
| 08-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 01/04/2008 | 08/20/2010 |
| 09-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 04/15/2009 | 08/20/2010 |
| 10-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 03/25/2010 | 08/20/2010 |
| 10-0501-EL-FOR | OHIO POWER COMPANY | 03/25/2010 | 02/15/2017 |
| 10-0502-EL-FOR | COLUMBUS SOUTHERN POWER COMPANY | 03/25/2010 | 02/15/2017 |
| 11-1439-EL-FOR | DUKE ENERGY INC | 03/25/2011 | 12/17/2015 |
| 12-0118-EL-FOR | DUKE ENERGY OHIO INC | 02/14/2012 | 11/18/2015 |
| 13-0398-EL-FOR | DUKE ENERGY OHIO INC | 02/11/2013 | 11/18/2015 |
| 14-0322-EL-FOR | Duke Energy Ohio Inc | 02/26/2014 | 11/18/2015 |
| 14-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 04/15/2014 | 12/01/2017 |
| 15-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 04/15/2015 | 11/22/2017 |
| 15-0774-EL-FOR | In the Matter of the Long-Term Forecast and Resource Plan of Duke Energy Ohio, Inc. | 04/16/2015 | 11/18/2015 |
| 15-1501-EL-FOR | AEP OHIO TRANSMISSION COMPANY INC | 04/15/2015 | 12/01/2017 |
| 16-0500-EL-FOR | OHIO VALLEY ELECTRIC COMPANY | 04/15/2016 | 12/01/2017 |
| 16-1501-EL-FOR | AEP OHIO TRANSMISSION COMPANY | 04/15/2016 | 12/01/2017 |
| 17-0500-EL-FOR | OHIO VALLEY ELECTRIC CORP | 04/17/2017 | 12/01/2017 |
| 18-0500-EL-FOR | OVEC | 04/16/2018 | 07/16/2019 |
| 18-1501-EL-FOR | AEP OHIO TRANSCO | 04/16/2018 | 05/03/2019 |
| 90-0419-EL-FOR | TOLEDO EDISON COMPANY/CEI | 03/09/1990 | 02/07/1991 |
| 91-0698-EL-FOR | OHIO EDISON COMPANY | 04/15/1991 | 12/30/1993 |
| 92-0706-EL-FOR | OHIO EDISON COMPANY | 04/15/1992 | 02/24/1994 |
| 92-0708-EL-FOR | CENTERIOR ENERGY CORPORATION | 04/15/1992 | 02/17/1993 |
| 93-0204-EL-FOR | OHIO EDISON COMPANY | 02/03/1993 | 12/30/1993 |
| 95-0203-EL-FOR | CINCINNATI GAS & ELECTRIC CO. | 01/06/1995 | 10/30/1997 |