| Case Number | Case Title | Open Date | Closed Date |
| 71-0757-GA-COI | INV OF NATURAL GAS SUPPLY | 11/24/1971 | 08/11/1976 |
| 73-0761-GA-COI | SUPPLY OF NATURAL GAS IN OHIO | 10/18/1973 | 03/30/1976 |
| 75-0901-GA-COI | DISTRBN OF NATURAL OR SYNTHETIC GAS | 11/03/1975 | 09/29/1976 |
| 76-0012-GA-COI | INVESTIGATION SUPPLY NATURAL GAS | 01/15/1976 | 02/12/1976 |
| 76-0013-GA-COI | INVESTIGATION PROCUREMENT & DISTRBN | 01/15/1976 | 02/12/1976 |
| 76-0067-GA-COI | INVESTIGATION SUPPLY NATURAL GAS | 02/03/1976 | 05/19/1976 |
| 77-0139-GA-COI | PROMULGATION OF EMERGENCY SELF HELP | 01/20/1977 | 02/28/1977 |
| 77-0338-GA-COI | COLUMBIA GAS OF OHIO INCORPORATED | 02/14/1977 | 02/08/1978 |
| 78-1124-GA-COI | COLUMBIA GAS OF OHIO INCORPORATED | 08/01/1978 | 06/06/1979 |
| 78-1475-GA-COI | COLUMBIA GAS OF OHIO INCORPORATED | 12/01/1978 | 04/18/1979 |
| 79-0757-GA-COI | GAS PIPELINES CITY OF URBANA | 08/28/1979 | 09/07/1983 |
| 79-1171-GA-COI | NATURAL GAS POLICY ACT | 11/26/1979 | 07/25/1980 |
| 80-0402-GA-COI | COLUMBIA GAS OF OHIO INCORPORATED | 04/10/1980 | 09/10/1980 |
| 81-0240-GA-COI | OHIO PRODUCED GAS AND NATURALAS CO | 02/23/1981 | 07/27/1983 |
| 81-0589-GA-COI | CINCINNATI GAS AND ELECTRIC COT | 05/12/1981 | 07/27/1983 |
| 81-0978-GA-COI | COLUMBIA GAS OF OHIO INCORPORATED | 08/19/1981 | 03/03/1982 |
| 82-0095-GA-COI | OHIO GAS COMPANY | 01/13/1982 | 03/09/1983 |
| 82-0436-GA-COI | EAST OHIO GAS COMPANY | 03/16/1982 | 04/06/1983 |
| 82-1203-GA-COI | COLUMBIA LNG CORPORATION | 09/29/1982 | 07/27/1983 |
| 82-1304-GA-COI | RECONNECTION OF GAS SERVICE | 10/22/1982 | 03/09/1983 |
| 84-0262-GA-COI | CLINTONIAN FUEL AND OIL COMPANY | 03/05/1984 | 07/03/1984 |
| 84-0305-GA-COI | SHELDON GAS COMPANY | 03/09/1984 | 06/05/1984 |
| 84-1082-GA-COI | CLINTONIAN FUEL AND OIL COMPANY | 09/13/1984 | 04/01/1986 |
| 85-0800-GA-COI | OHIO DISTRIBUTION UTILITIES | 06/24/1985 | 03/20/2003 |
| 85-1951-GA-COI | W H DENNIS AND SONATRUAL GAS | 12/23/1985 | 03/18/1986 |
| 86-0702-GA-COI | GAS COST RECOVERY AND FORCASTING | 05/01/1986 | 09/09/1987 |
| 86-0786-GA-COI | INVESTIGATION OF OLD GAS PRICING | 05/08/1986 | 07/22/1986 |
| 86-1084-GA-COI | INVESTIGATION OF MB OPERATING CO | 06/24/1986 | 09/24/1992 |
| 86-1663-GA-COI | RACINE GAS AND SERVICE COMPANY | 08/18/1986 | 02/03/1987 |
| 86-1664-GA-COI | RUTLAND FUEL GAS COMPANY | 08/18/1986 | 02/03/1987 |
| 86-1665-GA-COI | SYRACUSE HOME UTILITIES COMPANY | 08/18/1986 | 02/03/1987 |
| 86-1666-GA-COI | KIRCHNER AND ULLMAN GAS COMPANY | 08/18/1986 | 02/03/1987 |
| 86-2012-GA-COI | RACINE GAS AND SERVICE COMPANY | 10/14/1986 | |
| 86-2013-GA-COI | RUTLAND FUEL COMPANY | 10/14/1986 | |
| 86-2014-GA-COI | SYRACUSE HOME UTILITIES COMPANY | 10/14/1986 | |
| 87-0740-GA-COI | OHIO VALLEY GAS CORPORATION | 05/11/1987 | |
| 87-0796-GA-COI | DAYTON POWER & LIGHT COMPANY | 05/26/1987 | 06/21/1988 |
| 87-1078-GA-COI | EAST OHIO GAS COMPANY | 07/17/1987 | 01/20/1988 |
| 87-1799-GA-COI | WEST OHIO GAS COMPANY | 10/29/1987 | 12/07/1988 |
| 89-1586-GA-COI | COLUMBIA GAS OF OHIO, INC. | 10/24/1989 | |
| 91-0373-GA-COI | COMPETITIVE GAS SERVICES REVENUE | 02/21/1991 | 06/08/2000 |
| 91-2313-GA-COI | R.A. MILLER ENERGY CORPORATION | 12/31/1991 | 12/03/1993 |
| 94-0526-GA-COI | GAS INTEGRATED RESOURCE PLANNING | 03/17/1994 | 10/20/1994 |
| 97-0282-GA-COI | OHIO NATURAL GAS COMPANIES | 03/11/1997 | 03/12/1997 |
| 98-0593-GA-COI | COLUMBIA GAS OF OHIO, INC. | 04/09/1998 | |
| 98-0594-GA-COI | EAST OHIO GAS COMPANY | 04/09/1998 | 07/18/2002 |
| 98-0595-GA-COI | CINCINNATI GAS & ELECTRIC CO. | 04/09/1998 | 07/18/2002 |
| 98-0596-GA-COI | DAYTON POWER & LIGHT CO. | 04/09/1998 | 08/03/2000 |
| 98-1577-GA-COI | AVA GAS COMPANY | 11/18/1998 | 09/21/1999 |