| Case Number | Case Title | Open Date | Closed Date |
| 98-0577-GE-BRO | AMENDMENTS TO OAC | 04/06/1998 | 05/26/1998 |
| 98-0725-GE-AIS | CINCINNATI GAS & ELECTRIC CO. | 05/04/1998 | 06/02/1998 |
| 98-0942-GE-ORD | CHAPTERS 4901:1-17 & 4901:1-18 OAC | 06/15/1998 | 01/21/1999 |
| 98-1183-GE-CMT | CINCINNATI GAS & ELECTRIC COMPANY | 08/24/1998 | 06/01/2000 |
| 98-1558-GE-AEC | CG&E/UNITED DAIRY FARMERS | 11/12/1998 | 02/11/1999 |
| 98-1559-GE-AEC | CG&E/FRISCH'S RESTAURANTS, INC. | 11/12/1998 | 02/11/1999 |
| 98-1560-GE-AEC | CG&E/PARAMOUNT'S KINGS ISLAND | 11/12/1998 | 02/11/1999 |
| 98-1561-GE-AEC | CG&E/MIAMI UNIVERSITY | 11/12/1998 | 02/11/1999 |
| 98-1619-GE-AIS | CINCINNATI GAS & ELECTRIC COMPANY | 12/02/1998 | 12/30/1998 |
| 98-1627-GE-AEC | CINERGY CORPORATION | 12/04/1998 | 02/11/1999 |
| 98-1651-GE-AEC | CGE/CINCINNATI PUBLIC SCHOOLS | 12/14/1998 | 02/11/1999 |