| 660820Amendment | May 19, 2008 | May 19, 2008 | Chesapeake Operating, Inc. | Chevy #4HH | 9,000 | 25132912 |
| 660768 | May 16, 2008 | May 16, 2008 | Chesapeake Operating, Inc. | Peacock #6HH | 9,000 | 25132911 |
| 660767 | May 16, 2008 | May 16, 2008 | Chesapeake Operating, Inc. | Peacock #5HH | 9,000 | 25132910 |
| 660766 | May 16, 2008 | May 16, 2008 | Chesapeake Operating, Inc. | Peacock #4HH | 9,000 | 25132909 |
| 660766Amendment | May 16, 2008 | May 16, 2008 | Chesapeake Operating, Inc. | Peacock #4HH | 9,000 | 25132909 |
| 660684 | May 16, 2008 | May 16, 2008 | Arrington,david H. Oil & Gas,inc | Sweetface Delight #3HH | 7,200 | 25132906 |
| 658830 | May 16, 2008 | May 16, 2008 | EOG Resources, Inc. | Kemp a Unit #11HH | 10,000 | 25132820 |
| 658829 | May 16, 2008 | May 16, 2008 | EOG Resources, Inc. | Kemp a Unit #10HH | 10,000 | 25132821 |
| 658822 | May 16, 2008 | May 16, 2008 | EOG Resources, Inc. | Kemp a Unit #9HH | 10,000 | 25132819 |
| 660748 | May 15, 2008 | May 15, 2008 | Devon Energy Production Co, L.P. | Korb, William #3HH | 9,000 | 25132908 |
| 660743 | May 15, 2008 | May 15, 2008 | Devon Energy Production Co, L.P. | Abshire, William #2HH | 9,000 | 25132907 |
| 660656 | May 15, 2008 | May 15, 2008 | Chesapeake Operating, Inc. | Webb #1HH | 9,000 | 25132905 |
| 660656Amendment | May 15, 2008 | May 15, 2008 | Chesapeake Operating, Inc. | Webb #1HH | 9,000 | 25132905 |
| 658821 | May 15, 2008 | May 15, 2008 | EOG Resources, Inc. | Kemp a Unit #8HH | 10,000 | 25132818 |
| 658817 | May 15, 2008 | May 15, 2008 | EOG Resources, Inc. | Kemp a Unit #7HH | 10,000 | 25132816 |
| 660550 | May 14, 2008 | May 14, 2008 | Devon Energy Production Co, L.P. | Armstrong, James #9HH | 9,000 | 25132903 |
| 660549 | May 14, 2008 | May 14, 2008 | Devon Energy Production Co, L.P. | Armstrong, James #8HH | 9,000 | 25132900 |
| 660546 | May 14, 2008 | May 14, 2008 | Devon Energy Production Co, L.P. | Armstrong, James #7HH | 9,000 | 25132904 |
| 660545 | May 14, 2008 | May 14, 2008 | Devon Energy Production Co, L.P. | Armstrong, James #6HH | 9,000 | 25132901 |
| 660542 | May 14, 2008 | May 14, 2008 | Devon Energy Production Co, L.P. | Armstrong, James #5HH | 9,000 | 25132899 |
| 660474 | May 14, 2008 | May 14, 2008 | Williams Prod. Gulf Coast, L.P. | Colonel Spencer #3HH | 7,950 | 25132918 |
| 660451 | May 13, 2008 | May 13, 2008 | Chesapeake Operating, Inc. | Otra Baca B #5HH | 9,000 | 25132897 |
| 660451Amendment | May 13, 2008 | May 13, 2008 | Chesapeake Operating, Inc. | Otra Baca B #5HH | 9,000 | 25132897 |
| 655900Amendment | May 13, 2008 | May 13, 2008 | EOG Resources, Inc. | Cca Unit #2HH | 10,000 | 25132685 |
| 654871 | May 13, 2008 | May 13, 2008 | Devon Energy Production Co, L.P. | Sherrod, Frances #6H | 9,000 | 25132620 |
| 660434 | May 12, 2008 | May 12, 2008 | Devon Energy Production Co, L.P. | Armstrong, James #2HH | 9,000 | 25132893 |
| 660441 | May 8, 2008 | May 8, 2008 | Williams Prod. Gulf Coast, L.P. | Bransom #3HH | 7,705 | 25132896 |
| 660439 | May 8, 2008 | May 8, 2008 | Devon Energy Production Co, L.P. | James Armstrong #4HH | 9,000 | 25132895 |
| 660437 | May 8, 2008 | May 8, 2008 | Devon Energy Production Co, L.P. | James Armstrong #3HH | 9,000 | 25132894 |
| 660400 | May 8, 2008 | May 8, 2008 | Devon Energy Production Co, L.P. | James Armstrong #1HH | 9,000 | 25132892 |
| 660391 | May 8, 2008 | May 8, 2008 | Chesapeake Operating, Inc. | Meadows #12HH | 9,000 | 25132891 |
| 660311 | May 7, 2008 | May 7, 2008 | EOG Resources, Inc. | Smelley #5HH | 10,000 | 25132890 |
| 660307 | May 7, 2008 | May 7, 2008 | EOG Resources, Inc. | Smelley #4HH | 10,000 | 25132889 |
| 660288 | May 7, 2008 | May 7, 2008 | Quicksilver Resources Inc. | James B. Mooney Unit #1HH | 9,000 | 25132898 |
| 647979Amendment | May 7, 2008 | May 7, 2008 | XTO Energy Inc. | Liberty Chapel Unit #1HH | 11,000 | 25132312 |
| 660254 | May 6, 2008 | May 6, 2008 | XTO Energy Inc. | Ruth Turner Unit #3HH | 12,000 | 25132888 |
| 660254Amendment | May 6, 2008 | May 6, 2008 | XTO Energy Inc. | Ruth Turner Unit #3HH | 12,000 | 25132888 |
| 660245 | May 6, 2008 | May 6, 2008 | XTO Energy Inc. | Ruth Turner Unit #2HH | 12,000 | 25132887 |
| 660163 | May 5, 2008 | May 5, 2008 | Chesapeake Operating, Inc. | Peacock #3HH | 9,000 | 25132886 |
| 660139 | May 5, 2008 | May 5, 2008 | Chesapeake Operating, Inc. | Eltzroth #2HH | 9,000 | 25132884 |
| 660139Amendment | May 5, 2008 | May 5, 2008 | Chesapeake Operating, Inc. | Eltzroth #2HH | 9,000 | 25132884 |
| 660138 | May 5, 2008 | May 5, 2008 | Chesapeake Operating, Inc. | Eltzroth #1HH | 9,000 | 25132885 |
| 660138Amendment | May 5, 2008 | May 5, 2008 | Chesapeake Operating, Inc. | Eltzroth #1HH | 9,000 | 25132885 |
| 659962 | May 5, 2008 | May 5, 2008 | Devon Energy Production Co, L.P. | Hes #5HH | 9,000 | 25132875 |
| 660121 | May 2, 2008 | May 2, 2008 | Chesapeake Operating, Inc. | Lowell Meadows #1HH | 9,000 | 25132883 |
| 660078 | May 2, 2008 | May 2, 2008 | Range Production Company | Jackson Deaver Unit #4HH | 9,000 | 25132880 |
| 660077 | May 2, 2008 | May 2, 2008 | Range Production Company | Wardlay #11HH | 9,000 | 25132882 |
| 660076 | May 2, 2008 | May 2, 2008 | Range Production Company | Wardlay #10HH | 9,000 | 25132879 |
| 660073 | May 2, 2008 | May 2, 2008 | Range Production Company | Wardlay #4HH | 9,000 | 25132878 |
| 660055 | May 2, 2008 | May 2, 2008 | Chesapeake Operating, Inc. | Haynie #2HH | 9,000 | 25132877 |
| 659964 | May 2, 2008 | May 2, 2008 | Arrington,david H. Oil & Gas,inc | Sweetface Delight #2HH | 7,200 | 25132876 |
| 640970Amendment | May 2, 2008 | May 2, 2008 | Devon Energy Production Co, L.P. | Boyd, Billy #4H | 9,000 | 25131933 |
| 640968Amendment | May 2, 2008 | May 2, 2008 | Devon Energy Production Co, L.P. | Boyd, Billy #3H | 9,000 | 25131932 |
| 659960 | May 1, 2008 | May 1, 2008 | Devon Energy Production Co, L.P. | Hes #4HH | 9,000 | 25132874 |
| 659956 | May 1, 2008 | May 1, 2008 | Devon Energy Production Co, L.P. | Hes #3HH | 9,000 | 25132873 |
| 659931 | May 1, 2008 | May 1, 2008 | Range Production Company | Wardlay #3HH | 9,000 | 25132872 |
| 659899 | May 1, 2008 | May 1, 2008 | EOG Resources, Inc. | Little Buddy Unit #12HH | 10,000 | 25132871 |
| 659895 | May 1, 2008 | May 1, 2008 | EOG Resources, Inc. | Little Buddy Unit #11HH | 10,000 | 25132881 |
| 659632 | Apr 30, 2008 | Apr 30, 2008 | Chesapeake Operating, Inc. | Texan #1HH | 9,000 | 25132867 |
| 651095Amendment | Apr 30, 2008 | Apr 30, 2008 | EOG Resources, Inc. | Pallmeyer Unit #8HH | 10,000 | 25132436 |
| 650828Amendment | Apr 30, 2008 | Apr 30, 2008 | EOG Resources, Inc. | Pallmeyer Unit #7HH | 10,000 | 25132430 |
| 659822 | Apr 29, 2008 | Apr 29, 2008 | Devon Energy Production Co, L.P. | John Whitehorn #2HH | 9,000 | 25132870 |
| 659338 | Apr 29, 2008 | Apr 29, 2008 | Bosque Disposal Systems, LLC | Sophia SWD #1 | 13,000 | 25132853 |
| 659752 | Apr 28, 2008 | Apr 28, 2008 | EOG Resources, Inc. | Ferguson Foundation Unit #6HH | 10,000 | 25132869 |
| 659692 | Apr 28, 2008 | Apr 28, 2008 | Devon Energy Production Co, L.P. | Burley Matthews #2HH | 9,000 | 25132868 |
| 659457 | Apr 28, 2008 | Apr 28, 2008 | Chesapeake Operating, Inc. | Quail Hollow #1HH | 9,000 | 25132856 |
| 659457Amendment | Apr 28, 2008 | Apr 28, 2008 | Chesapeake Operating, Inc. | Quail Hollow #1HH | 9,000 | 25132856 |
| 659389 | Apr 28, 2008 | Apr 28, 2008 | Chesapeake Operating, Inc. | Damsel Fly Nymph #10HH | 9,000 | 25132852 |
| 659389Amendment | Apr 28, 2008 | Apr 28, 2008 | Chesapeake Operating, Inc. | Damsel Fly Nymph #10HH | 9,000 | 25132852 |
| 659328 | Apr 28, 2008 | Apr 28, 2008 | EOG Resources, Inc. | Leonard Unit #6HH | 10,000 | 25132848 |
| 659157 | Apr 28, 2008 | Apr 28, 2008 | Devon Energy Production Co, L.P. | Carlock, Allen #2HH | 9,000 | 25132842 |
| 659563 | Apr 26, 2008 | Apr 26, 2008 | Devon Energy Production Co, L.P. | Hooper #7HH | 9,000 | 25132865 |
| 659558 | Apr 26, 2008 | Apr 26, 2008 | Devon Energy Production Co, L.P. | Hooper #6HH | 9,000 | 25132864 |
| 659553 | Apr 26, 2008 | Apr 26, 2008 | Devon Energy Production Co, L.P. | Hooper #4HH | 9,000 | 25132863 |
| 659482 | Apr 26, 2008 | Apr 26, 2008 | Williams Prod. Gulf Coast, L.P. | Colonel Spencer #2HH | 7,950 | 25132860 |
| 659482Amendment | Apr 26, 2008 | Apr 26, 2008 | Williams Prod. Gulf Coast, L.P. | Colonel Spencer #2HH | 7,950 | 25132860 |
| 659464 | Apr 26, 2008 | Apr 26, 2008 | XTO Energy Inc. | Hatcher Unit #1HH | 10,500 | 25132857 |
| 659427 | Apr 26, 2008 | Apr 26, 2008 | Chesapeake Operating, Inc. | Quail Hollow #4HH | 9,000 | 25132854 |
| 659427Amendment | Apr 26, 2008 | Apr 26, 2008 | Chesapeake Operating, Inc. | Quail Hollow #4HH | 9,000 | 25132854 |
| 659422 | Apr 26, 2008 | Apr 26, 2008 | Chesapeake Operating, Inc. | Quail Hollow #5HH | 9,000 | 25132858 |
| 659422Amendment | Apr 26, 2008 | Apr 26, 2008 | Chesapeake Operating, Inc. | Quail Hollow #5HH | 9,000 | 25132858 |
| 654229Amendment | Apr 26, 2008 | Apr 26, 2008 | Chesapeake Operating, Inc. | Esparza #4HH | 9,000 | 25132583 |
| 640937Amendment | Apr 26, 2008 | Apr 26, 2008 | Devon Energy Production Co, L.P. | Boyd, Billy #2H | 9,000 | 25131931 |
| 659506 | Apr 25, 2008 | Apr 25, 2008 | Arrington,david H. Oil & Gas,inc | Sweetface Delight #1HH | 7,200 | 25132862 |
| 659384 | Apr 25, 2008 | Apr 25, 2008 | Range Production Company | Mash #1HH | 9,000 | 25132851 |
| 659384Amendment | Apr 25, 2008 | Apr 25, 2008 | Range Production Company | Mash #1HH | 9,000 | 25132851 |
| 659354 | Apr 25, 2008 | Apr 25, 2008 | Williams Prod. Gulf Coast, L.P. | Bransom #2HH | 7,705 | 25132849 |
| 659354Amendment | Apr 25, 2008 | Apr 25, 2008 | Williams Prod. Gulf Coast, L.P. | Bransom #2HH | 7,705 | 25132849 |
| 659320 | Apr 25, 2008 | Apr 25, 2008 | EOG Resources, Inc. | Leonard Unit #5HH | 10,000 | 25132846 |
| 659319 | Apr 25, 2008 | Apr 25, 2008 | EOG Resources, Inc. | Leonard Unit #4HH | 10,000 | 25132847 |
| 659286 | Apr 25, 2008 | Apr 25, 2008 | North Texas Llano Operating Corp | Sanderford #1HH | 9,000 | 25132859 |
| 558760Amendment | Apr 25, 2008 | Apr 25, 2008 | XTO Energy Inc. | White A #1 HH | 10,000 | 25130350 |
| 659303 | Apr 24, 2008 | Apr 24, 2008 | XTO Energy Inc. | Harper Cattle #C 10BHH | 11,000 | 25132845 |
| 659303Amendment | Apr 24, 2008 | Apr 24, 2008 | XTO Energy Inc. | Harper Cattle C Unit #10BHH | 11,000 | 25132845 |
| 659303Amendment | Apr 24, 2008 | Apr 24, 2008 | XTO Energy Inc. | Harper Cattle C Unit #10BHH | 11,000 | 25132845 |
| 659287 | Apr 24, 2008 | Apr 24, 2008 | Devon Energy Production Co, L.P. | Wittman, Robert #1HH | 9,000 | 25132844 |
| 659222 | Apr 24, 2008 | Apr 24, 2008 | Chesapeake Operating, Inc. | Tantarra Estate #5HH | 9,000 | 25132861 |
| 659221 | Apr 24, 2008 | Apr 24, 2008 | Chesapeake Operating, Inc. | Tantarra Estate #4HH | 9,000 | 25132850 |
| 659219 | Apr 24, 2008 | Apr 24, 2008 | Chesapeake Operating, Inc. | Billy Davenport #9HH | 9,000 | 25132843 |
| 659219Amendment | Apr 24, 2008 | Apr 24, 2008 | Chesapeake Operating, Inc. | Davenport, Billy #9HH | 9,000 | 25132843 |