| Company | THREE RIVERS ENERGY ASSOCIATES 1983-1 |
| Business Number | 853568 |
| Company | KEYSTONE-EMPIRE ENERGY ASSOCIATES 1982-2 |
| Business Number | 809441 |
| Company | KEYSTONE-EMPIRE COMPLETION ASSOCIATES 1981-1 |
| Business Number | 772500 |
| Company | KEYSTONE-EMPIRE DRILLING ASSOCIATES 1981-1 |
| Business Number | 772499 |
| Company | COLUMBUS-KEYSTONE ENERGY ASSOCIATES - 1982 |
| Business Number | 800234 |
| Company | THREE RIVERS ENERGY ASSOICATES 1981-4 |
| Business Number | 734898 |