| Mayer 36 #542-435-34575 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,325 | Jul 26, 1999 | — | — |
| Jones Ranch #186542-435-34965 | Upp Operating LLC | Sutton, TXEldorado Southwest (Strawn) | ActiveGas | 8,075 | Jul 26, 1999 | — | — |
| Jones Ranch #30542-435-34964 | Upp Operating LLC | Sutton, TXEldorado Southwest (Strawn) | ActiveGas | 8,150 | Jul 23, 1999 | — | — |
| David 109 #1242-435-34963 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,550 | Jul 21, 1999 | — | — |
| Vanderstucken 81 #442-435-34962 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,450 | Jul 15, 1999 | — | — |
| Hill-Mayer Edwin S. Jr. E #442-435-34919 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,075 | Jul 12, 1999 | — | — |
| Granger Bluff #110142-435-34959 | Blackstone Energy Services LLC | Sutton, TXWhitehead (Strawn) | ActiveGas | 9,225 | Jul 6, 1999 | — | — |
| Mayer 47 #442-435-34957 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,333 | Jun 23, 1999 | — | — |
| Miers Allison #730442-435-33112 | Dominion Oklahoma Texas E&P Inc | Sutton, TXFawcett (Wolfcamp) | PluggedGas | 6,217 | Jun 16, 1999 | — | — |
| Dunbar Ned #4642-435-34946 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,230 | Jun 14, 1999 | — | — |
| Davis C #842-435-34948 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | Temporarily abandonedGas | 6,753 | Jun 11, 1999 | — | — |
| Reinhardt 6 #842-435-34954 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,364 | Jun 9, 1999 | — | — |
| Shurley 111 #1342-435-34955 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,550 | Jun 9, 1999 | — | — |
| Thomson #442-435-34950 | Dominion Oklahoma Texas E&P Inc | Sutton, TXSteen (Wolfcamp) | PluggedGas | 9,000 | Jun 3, 1999 | — | — |
| Shurley 98 #1542-435-34952 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,450 | Jun 3, 1999 | — | — |
| Mayfield 45 #742-435-34953 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,425 | Jun 3, 1999 | — | — |
| Dunbar Ned #4542-435-34947 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,210 | Jun 2, 1999 | — | — |
| Davis C #742-435-34949 | — | Sutton, TXPhyllis Sonora (Canyon Lower) | Plugged | 9,000 | Jun 2, 1999 | — | — |
| Jones Ranch #30442-435-34951 | Upp Operating LLC | Sutton, TXSonora (Ellenburger) | ActiveGas | 8,161 | Jun 1, 1999 | — | — |
| Jones Ranch #30342-435-34945 | Upp Operating LLC | Sutton, TXEldorado Southwest (Strawn) | ActiveGas | 8,075 | May 27, 1999 | — | — |
| Shannon 52 #742-435-34572 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,150 | May 26, 1999 | — | — |
| Shurley 99 #1242-435-34943 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,450 | May 21, 1999 | — | — |
| Fields 17 #1442-435-34944 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,050 | May 21, 1999 | — | — |
| Richardson 138 #1242-435-34942 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,400 | May 18, 1999 | — | — |
| Fields 21 #342-435-32166 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,034 | May 12, 1999 | — | — |
| Ward R.C. M #500242-435-34258 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,150 | May 12, 1999 | — | — |
| Shurley 99 #1442-435-34941 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,550 | May 12, 1999 | — | — |
| Hicks 61 #242-435-31314 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 4,761 | May 4, 1999 | — | — |
| Richardson 6 #642-435-34940 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,400 | May 4, 1999 | — | — |
| Reinhardt 6 #742-435-34938 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,367 | Apr 15, 1999 | — | — |
| Mayer 47 #542-435-34937 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,400 | Apr 12, 1999 | — | — |
| Fields 20 #842-435-34935 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,000 | Mar 31, 1999 | — | — |
| Sawyer 169 #342-435-33543 | Robert C. Brower LLC | Sutton, TXSawyer (Leonard) | ActiveGas | 7,600 | Mar 29, 1999 | — | — |
| Pfluger 85 #1542-435-34931 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,500 | Mar 26, 1999 | — | — |
| Pfluger 84 #1342-435-34932 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,500 | Mar 26, 1999 | — | — |
| Mayer 38 #442-435-34933 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,150 | Mar 26, 1999 | — | — |
| Fields 17 #1342-435-34934 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,050 | Mar 26, 1999 | — | — |
| Fields 21 #742-435-34930 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,000 | Feb 26, 1999 | — | — |
| Sawyer 112 #1542-435-34929 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,800 | Feb 23, 1999 | — | — |
| Mayer 37 #1042-435-34926 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,264 | Feb 19, 1999 | — | — |
| Mayer Minnie H. C #242-435-34928 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,250 | Feb 19, 1999 | — | — |
| Bloodworth 11 #442-435-34925 | Upp Operating LLC | Sutton, TXWhitehead (Strawn) | ActiveGas | 9,004 | Feb 16, 1999 | — | — |
| Mayfield 46 #1242-435-34924 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,403 | Feb 12, 1999 | — | — |
| McMillan Leo H. 108 #1542-435-34921 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,600 | Feb 9, 1999 | — | — |
| David 109 #1142-435-34922 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,600 | Feb 9, 1999 | — | — |
| Richardson 135 #642-435-34913 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,400 | Jan 27, 1999 | — | — |
| Richardson 4 #542-435-34914 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,462 | Jan 27, 1999 | — | — |
| Pfluger 105 #1142-435-34915 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,450 | Jan 27, 1999 | — | — |
| McMillan Leo H. 108 #1242-435-34917 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,550 | Jan 27, 1999 | — | — |
| McMillan Leo H. 108 #1342-435-34918 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 5,550 | Jan 27, 1999 | — | — |