| Case Number | Case Title | Open Date | Closed Date |
| 00-0472-GA-ATR | STRONGSVILLE PIPE COMPANY | 03/09/2000 | |
| 00-0524-GA-ATR | VECTREN ENERGY/INDIANA GAS/DP&L | 03/20/2000 | |
| 00-2275-GA-ATR | CLEARFIELD OHIO HOLDINGS,INC/SOUTHEASTERN NAT. GAS/PARAMOUNT NAT. GAS CO. | 11/19/2000 | |
| 03-1102-GA-ATR | OHIO CUMBERLAND GAS COMPANY & COLUMBIA GAS OF OHIO, INC. | 05/01/2003 | |
| 04-0761-GA-ATR | HORIZON UTILITY GROUP/KNOX ENERGY COOPERATIVE | 05/19/2004 | |
| 04-1063-GA-ATR | CONSTITUTION GAS TRANSPORT COMPANY, LLC/CONSTITUTION GAS TRANSPORT COMPANY INC. | 07/02/2004 | |
| 04-1417-GA-ATR | COLUMBIA GAS OF OHIO, INC./UTILITY PIPELINE LTD. | 09/14/2004 | 02/02/2005 |
| 05-0554-GA-ATR | THE EAST OHIO GAS COMPANY | 04/25/2005 | |
| 05-0555-GA-ATR | THE EAST OHIO GAS COMPANY | 04/25/2005 | |
| 05-1267-GA-ATR | NORTHERN INDUSTRIAL ENERGY DEVELOPMENT, INC | 10/12/2005 | 12/14/2005 |
| 06-0404-GA-ATR | BRAINARD GAS CORP & ORWELL NATURAL GAS COMPANY | 03/09/2006 | 05/26/2006 |
| 07-0633-GA-ATR | NORTHERN INDUSTRIAL ENERGY DEVELOPMENT INC, KNOX ENERGY COOPERATIVE ASSOCIATION AND THE EAST OHIO GAS COMPANY DBA DOMINION EAST OHIO | 05/24/2007 | |
| 07-0767-GA-ATR | NORTHEAST OHIO NATURAL GAS/COLUMBIA GAS OF OHIO | 06/29/2007 | |
| 08-0740-GA-ATR | COLUMBIA GAS OF OHIO INC AND CONSUMERS GAS COOPERATIVE | 06/17/2008 | |
| 08-0934-GA-ATR | K & G ENERGY INC/ EAST OHIO GAS COMPANY DBA DOMINION EAST OHIO | 07/31/2008 | |
| 74-0415-GA-ATR | COLUMBIA GAS OF OHIO INCORPORATED | 07/08/1974 | 11/12/1974 |
| 77-1492-GA-ATR | OHIO GAS COMPANY | 12/19/1977 | 02/02/1978 |
| 77-1501-GA-ATR | NEWZANE GAS COMPANY | 12/21/1977 | 08/30/1978 |
| 82-0391-GA-ATR | CINCINNATI GAS AND ELECTRIC COMPANY | 03/09/1982 | 06/02/1982 |
| 82-1049-GA-ATR | CONSUMERS NATURAL GAS COMPANY | 08/13/1982 | 12/08/1982 |
| 84-0976-GA-ATR | NATIONAL GAS AND OIL CORPORATION | 08/22/1984 | 09/11/1984 |
| 85-0214-GA-ATR | CINCINNATI GAS AND ELECTRIC COMPANY | 02/19/1985 | 02/20/1985 |
| 85-0947-GA-ATR | W H DENNIS AND SONATURAL GAS CO, FR | 07/23/1985 | 05/28/1986 |
| 85-1069-GA-ATR | OHIO GAS COMPANY | 08/12/1985 | 09/17/1985 |
| 85-1292-GA-ATR | NATIONAL GAS AND OIL CORPORATION | 10/01/1985 | 10/08/1985 |
| 85-1785-GA-ATR | NATIONAL FUEL GAS DISTRBN CORP | 11/20/1985 | 12/30/1985 |
| 85-1898-GA-ATR | NATIONAL GAS AND OIL CORPORATION | 12/13/1985 | 01/22/1986 |
| 86-0770-GA-ATR | DENNIS AND SON GAS CO/WILLGROVE GAS | 05/07/1986 | 05/20/1986 |
| 86-1682-GA-ATR | NAT'L GAS AND OIL CORP/CLINTONIAN | 08/21/1986 | 08/11/1987 |
| 86-2183-GA-ATR | NATIONAL GAS & OIL/OHIO CUMBERLAND | 11/19/1986 | 01/13/1987 |
| 86-2198-GA-ATR | ELLIS T. MYERS GAS CO/NORTHEAST GAS | 11/20/1986 | 12/16/1986 |
| 86-2321-GA-ATR | KIRCHNER GAS CO/NORTHERN INDUSTRIAL | 12/15/1986 | 12/23/1986 |
| 88-0427-GA-ATR | SUBURBAN FUEL GAS/CONSUMERS NATURAL | 03/15/1988 | 04/19/1988 |
| 88-0488-GA-ATR | CINCINNATI GAS & ELECTRIC COMPANY | 03/25/1988 | 05/03/1988 |
| 90-0754-GA-ATR | DAYTON POWER & LIGHT/COLUMBIA GAS | 05/04/1990 | 10/25/1990 |
| 90-1492-GA-ATR | WEST OHIO GAS/COLUMBIA GAS OF OHIO | 09/24/1990 | 12/13/1990 |
| 90-1561-GA-ATR | OHIO GAS CO/COLUMBIA GAS OF OHIO | 10/09/1990 | 12/13/1990 |
| 91-1626-GA-ATR | DAYTON POWER/COLUMBIA GAS | 09/05/1991 | 02/06/1992 |
| 91-2314-GA-ATR | NORTHEAST OHIO NAT GAS/NORTHERN IND | 12/31/1991 | 02/27/1992 |
| 94-0693-GA-ATR | NORTHEAST OHIO NAT GAS/CENTRAL OHIO | 04/13/1994 | 06/30/1994 |
| 94-0785-GA-ATR | OHIO CUMBERLAND GAS/COLUMBIA GAS | 05/04/1994 | 06/23/1994 |
| 94-0938-GA-ATR | COLUMBIA GAS/SUBURBAN NATURAL GAS | 05/23/1994 | 01/18/1996 |
| 95-0877-GA-ATR | NORTHEAST OH NAT GAS/CEN OH NAT GAS | 09/22/1995 | 11/02/1995 |
| 99-0994-GA-ATR | COLUMBIA GAS/MURPHY GAS | 08/24/1999 | |