| Case Number | Case Title | Open Date | Closed Date |
| 00-0824-HT-UNC | THERMAL VENTURES, INC. | 05/10/2000 | |
| 02-0235-HT-UNC | YOUNGSTOWN THERMAL, LTD. PARTNERSHIP/ YOUNGSTOWN THERMAL LLC | 01/28/2002 | |
| 04-1179-HT-UNC | DOMINION ENERGY, INC./DOMINION CLEVELAND STEAM DISTRIBUTION, LLC/DOMINION CLEVELAND CHILLED WATER DISTRIBUTION, LLC | 07/26/2004 | |
| 77-1522-HT-UNC | DAYTON POWER AND LIGHT COMPANY | 12/29/1977 | 01/18/1978 |
| 81-1566-HT-UNC | CLEVELAND ELECTRIC ILLUMINATING CO | 12/15/1981 | 01/13/1982 |
| 91-0910-HT-UNC | CLEVE THERMAL/UNITED THER/MID-AMERI | 05/17/1991 | 06/20/1991 |
| 99-0413-HT-UNC | THERMAL VENTURES/MILL CREEK INVEST | 03/31/1999 | 05/19/1999 |