| Canyon Ranch #0938S42-435-35447 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,335 | Apr 3, 2001 | — | — |
| Canyon Ranch #1263S42-435-35448 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,294 | Apr 3, 2001 | — | — |
| Simmons 72 #542-435-35449 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,990 | Apr 3, 2001 | — | — |
| Sawyer 128 #1542-435-35450 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,150 | Apr 3, 2001 | — | — |
| Mayer Edwin S. Jr. #30342-435-34897 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,033 | Mar 29, 2001 | — | — |
| Shannon 52 #842-435-35438 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,050 | Mar 29, 2001 | — | — |
| Shannon 52 #1042-435-35439 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,100 | Mar 29, 2001 | — | — |
| Simmons Ranch #1342-435-35440 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,300 | Mar 29, 2001 | — | — |
| Simmons Ranch #1442-435-35441 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,300 | Mar 29, 2001 | — | — |
| Shannon 51 #1042-435-35442 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,150 | Mar 29, 2001 | — | — |
| Davis C #1042-435-35434 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,257 | Mar 27, 2001 | — | — |
| Davis C #1142-435-35435 | Enervest Operating L.L.C. | Sutton, TXSonora (Canyon Upper) | PluggedGas | 7,000 | Mar 27, 2001 | — | — |
| Davis C #1342-435-35436 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | Temporarily abandonedGas | 6,350 | Mar 27, 2001 | — | — |
| Davis C #1642-435-35437 | Enervest Operating L.L.C. | Sutton, TXSonora (Canyon Upper) | PluggedGas | 7,050 | Mar 27, 2001 | — | — |
| Meckel a #1442-435-35427 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | Temporarily abandonedGas | 6,528 | Mar 26, 2001 | — | — |
| Meckel a #1342-435-35428 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | Temporarily abandonedGas | 7,066 | Mar 26, 2001 | — | — |
| Meckel a #1542-435-35429 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,288 | Mar 26, 2001 | — | — |
| Thomson a #342-435-35430 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,155 | Mar 26, 2001 | — | — |
| Thomson C #542-435-35431 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,539 | Mar 26, 2001 | — | — |
| Ward 114 #1R42-435-35432 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,950 | Mar 26, 2001 | — | — |
| Ward 127 #1542-435-35433 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,900 | Mar 26, 2001 | — | — |
| Fields 52 #1042-435-35418 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,150 | Mar 22, 2001 | — | — |
| Fields 53 #442-435-35419 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,210 | Mar 22, 2001 | — | — |
| Hicks 22 #742-435-35420 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,627 | Mar 22, 2001 | — | — |
| Mayer #50342-435-35421 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,600 | Mar 22, 2001 | — | — |
| Mayer 3C #242-435-35422 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,875 | Mar 22, 2001 | — | — |
| Shurley 111 #1642-435-35423 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,800 | Mar 22, 2001 | — | — |
| Shurley 95 #1242-435-35424 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,300 | Mar 22, 2001 | — | — |
| Shurley 98 #942-435-35425 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,350 | Mar 22, 2001 | — | — |
| Canyon Ranch #1155S42-435-35417 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,350 | Mar 21, 2001 | — | — |
| Hill-Fawcett Randee Trust F #342-435-35414 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,660 | Mar 19, 2001 | — | — |
| Shurley 111 #1942-435-35415 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,777 | Mar 19, 2001 | — | — |
| Shurley 99 #1842-435-35416 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,600 | Mar 19, 2001 | — | — |
| Shurley 94 #1142-435-35413 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,150 | Mar 16, 2001 | — | — |
| Vanderstucken Joe M. #442-435-35412 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,750 | Mar 15, 2001 | — | — |
| Hicks 23 #342-435-35409 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,650 | Mar 14, 2001 | — | — |
| Hicks 22 #442-435-35410 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,700 | Mar 14, 2001 | — | — |
| Hicks 22 #642-435-35411 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,650 | Mar 14, 2001 | — | — |
| Canyon Ranch #1045S42-435-35406 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,350 | Mar 12, 2001 | — | — |
| Canyon Ranch #0937S42-435-35407 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,350 | Mar 12, 2001 | — | — |
| Canyon Ranch #0829S42-435-35408 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,350 | Mar 12, 2001 | — | — |
| Martin #1042-435-35404 | Smith Pipe of Abilene | Sutton, TXSonora (Canyon Upper) | PluggedGas | 6,850 | Mar 9, 2001 | — | — |
| Martin #942-435-35405 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,562 | Mar 9, 2001 | — | — |
| Mayer 3C #142-435-35401 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,715 | Mar 8, 2001 | — | — |
| Hicks 22 #542-435-35402 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,800 | Mar 8, 2001 | — | — |
| Behling #642-435-35403 | Toc Energy Resources LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,050 | Mar 8, 2001 | — | — |
| Sawyer 128 #1342-435-35399 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,573 | Mar 6, 2001 | — | — |
| Shurley 98 #1842-435-35400 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,600 | Mar 6, 2001 | — | — |
| Pfluger 84 #1942-435-35394 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,700 | Mar 1, 2001 | — | — |
| Pfluger 84 #1842-435-35395 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,550 | Mar 1, 2001 | — | — |