| 612385Amendment | Mar 2, 2006 | Mar 2, 2006 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #11 | 12,200 | 42332070 |
| 614991 | Mar 1, 2006 | Mar 1, 2006 | Southwestern Energy Prod. Co. | Smith | Perry Gas Unit 1 #8 | 12,200 | 42332083 |
| 614990 | Mar 1, 2006 | Mar 1, 2006 | Southwestern Energy Prod. Co. | Smith | McMoyle Unit 1 #11 | 12,350 | 42332082 |
| 613738 | Mar 1, 2006 | Mar 1, 2006 | Southwestern Energy Prod. Co. | Crane | Cowden "47" #1 | 7,700 | 10335212 |
| 613325 | Feb 28, 2006 | Feb 28, 2006 | Southwestern Energy Prod. Co. | Smith | Waldrop Gas Unit 1 #12 | 12,300 | 42332076 |
| 613325Amendment | Feb 28, 2006 | Feb 28, 2006 | Southwestern Energy Prod. Co. | Smith | Waldrop Gas Unit 1 #12 | 12,410 | 42332076 |
| 614356 | Feb 17, 2006 | Feb 17, 2006 | Southwestern Energy Prod. Co. | Culberson | Dela Minerals "3" State #701 | 13,500 | 10932268 |
| 612142 | Feb 16, 2006 | Feb 16, 2006 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #9 | 12,200 | 42332063 |
| 612142Amendment | Feb 16, 2006 | Feb 16, 2006 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #9 | 12,200 | 42332063 |
| 612663 | Feb 9, 2006 | Feb 9, 2006 | Southwestern Energy Prod. Co. | Smith | Douglas #1 | 12,200 | 42332071 |
| 611383 | Feb 7, 2006 | Feb 7, 2006 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #7 | 12,100 | 42332059 |
| 612933 | Jan 25, 2006 | Jan 25, 2006 | Southwestern Energy Prod. Co. | Smith | Vernon B. Wilson Gas Uni 1 #16 | 12,250 | 42332075 |
| 612680 | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Smith | Morby Unit 1 #12 | 12,300 | 42332074 |
| 612679 | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 2 #14 | 12,100 | 42332073 |
| 612679Amendment | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 2 #14 | 11,885 | 42332073 |
| 612678 | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Smith | Barton Gas Unit 1 #3 | 12,200 | 42332072 |
| 612677 | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Nacogdoches | Griffith Heirs #2 | 12,700 | 34732195 |
| 611139 | Jan 19, 2006 | Jan 19, 2006 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #8 | 12,400 | 42332057 |
| 612168 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 2 #15 | 12,100 | 42332068 |
| 612166 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Smith | Woolf Gas Unit 1 #17 | 11,850 | 42332067 |
| 612165 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Smith | McMoyle Unit 1 #8 | 12,350 | 42332066 |
| 612164 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #10 | 12,200 | 42332065 |
| 612162 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Smith | Jerry Cross Gas Unit 1 #10 | 12,200 | 42332064 |
| 612162Amendment | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Smith | Jerry Cross Gas Unit 1 #10 | 12,200 | 42332064 |
| 610309 | Jan 9, 2006 | Jan 9, 2006 | Southwestern Energy Prod. Co. | Smith | Morby Unit 1 #11 | 12,200 | 42332046 |
| 611196 | Dec 19, 2005 | Dec 19, 2005 | Southwestern Energy Prod. Co. | Smith | Kirkpatrick Gas Unit 1 #4 | 12,400 | 42332058 |
| 611140 | Dec 16, 2005 | Dec 16, 2005 | Southwestern Energy Prod. Co. | Smith | Kickapoo Creek Gas Unit 1 #15 | 12,200 | 42332055 |
| 611138 | Dec 16, 2005 | Dec 16, 2005 | Southwestern Energy Prod. Co. | Smith | Allred Gas Unit 1 #15 | 12,200 | 42332056 |
| 610953 | Dec 14, 2005 | Dec 14, 2005 | Southwestern Energy Prod. Co. | Smith | Perry Gas Unit 1 #6 | 12,400 | 42332054 |
| 609683 | Dec 12, 2005 | Dec 12, 2005 | Southwestern Energy Prod. Co. | Smith | Wright Gas Unit 1 #9 | 12,000 | 42332043 |
| 609683Amendment | Dec 12, 2005 | Dec 12, 2005 | Southwestern Energy Prod. Co. | Smith | Wright Gas Unit 1 #9 | 12,000 | 42332043 |
| 608230 | Nov 28, 2005 | Nov 28, 2005 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 2 #9 | 12,000 | 42332028 |
| 609613 | Nov 17, 2005 | Nov 17, 2005 | Southwestern Energy Prod. Co. | Smith | Kickapoo Creek Gas Unit 1 #12 | 12,100 | 42332041 |
| 609613Amendment | Nov 17, 2005 | Nov 17, 2005 | Southwestern Energy Prod. Co. | Smith | Kickapoo Creek Gas Unit 1 #12 | 12,100 | 42332041 |
| 609616 | Nov 16, 2005 | Nov 16, 2005 | Southwestern Energy Prod. Co. | Smith | Vernon B. Wilson Gas Unit 1 #12 | 12,050 | 42332042 |
| 609616Amendment | Nov 16, 2005 | Nov 16, 2005 | Southwestern Energy Prod. Co. | Smith | Vernon B. Wilson Gas Unit 1 #12 | 12,050 | 42332042 |
| 609615 | Nov 16, 2005 | Nov 16, 2005 | Southwestern Energy Prod. Co. | Angelina | Cameron #3 | 12,700 | 00530271 |
| 609605 | Nov 16, 2005 | Nov 16, 2005 | Southwestern Energy Prod. Co. | Cherokee | Barnes Gas Unit 1 #3 | 12,500 | 07331151 |
| 609603 | Nov 16, 2005 | Nov 16, 2005 | Southwestern Energy Prod. Co. | Smith | Jesse Randolph Odom Gas Unit 1 #4 | 12,500 | 42332040 |
| 609034 | Nov 4, 2005 | Nov 4, 2005 | Southwestern Energy Prod. Co. | Nacogdoches | Roberts #1 | 11,450 | 34732163 |
| 608928 | Nov 3, 2005 | Nov 3, 2005 | Southwestern Energy Prod. Co. | Smith | Milton Anderson Gas Unit 1 #16 | 12,000 | 42332036 |
| 608927 | Nov 3, 2005 | Nov 3, 2005 | Southwestern Energy Prod. Co. | Smith | Waldrop Gas Unit 1 #10 | 12,200 | 42332035 |
| 608926 | Nov 3, 2005 | Nov 3, 2005 | Southwestern Energy Prod. Co. | Smith | Grady Wilson Gas Unit 1 #16 | 12,250 | 42332034 |
| 608925 | Nov 3, 2005 | Nov 3, 2005 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 1 #15 | 11,900 | 42332033 |
| 608329 | Oct 24, 2005 | Oct 24, 2005 | Southwestern Energy Prod. Co. | Smith | Morby Unit 1 #13 | 12,400 | 42332029 |
| 608231 | Oct 21, 2005 | Oct 21, 2005 | Southwestern Energy Prod. Co. | Smith | J. F. Ware Gas Unit 1 #16 | 12,200 | 42332027 |
| 608229 | Oct 21, 2005 | Oct 21, 2005 | Southwestern Energy Prod. Co. | Smith | Waldrop Gas Unit 1 #9 | 12,300 | 42332026 |
| 608222 | Oct 21, 2005 | Oct 21, 2005 | Southwestern Energy Prod. Co. | Smith | Grady Wilson Gas Unit 1 #13 | 12,400 | 42332025 |
| 607975 | Oct 17, 2005 | Oct 17, 2005 | Southwestern Energy Prod. Co. | Culberson | Covington State #1 | 13,500 | 10931359 |
| 607404 | Oct 6, 2005 | Oct 6, 2005 | Southwestern Energy Prod. Co. | Smith | Jackson Gas Unit 1 #11 | 11,900 | 42332022 |
| 606633 | Sep 21, 2005 | Sep 21, 2005 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 2 #10 | 12,100 | 42332012 |
| 606627 | Sep 21, 2005 | Sep 21, 2005 | Southwestern Energy Prod. Co. | Smith | Grady Wilson Gas Unit 1 #10 | 12,200 | 42332010 |
| 606625 | Sep 21, 2005 | Sep 21, 2005 | Southwestern Energy Prod. Co. | Smith | Grady Wilson Gas Unit 1 #12 | 12,400 | 42332011 |
| 606624 | Sep 21, 2005 | Sep 21, 2005 | Southwestern Energy Prod. Co. | Cherokee | Sessions, Rube #2 | 11,900 | 07331144 |
| 606039 | Sep 8, 2005 | Sep 8, 2005 | Southwestern Energy Prod. Co. | Smith | McMoyle Unit 1 #7 | 12,300 | 42332005 |
| 606038 | Sep 8, 2005 | Sep 8, 2005 | Southwestern Energy Prod. Co. | Cherokee | Barnes Gas Unit 1 #2 | 12,600 | 07331142 |
| 606037 | Sep 8, 2005 | Sep 8, 2005 | Southwestern Energy Prod. Co. | Angelina | Sessions Heirs #2 | 11,900 | 00530266 |
| 606036 | Sep 8, 2005 | Sep 8, 2005 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 1 #16 | 12,000 | 42332006 |
| 606034 | Sep 8, 2005 | Sep 8, 2005 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #6 | 12,200 | 42332004 |
| 606034Amendment | Sep 8, 2005 | Sep 8, 2005 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #6 | 12,200 | 42332004 |
| 605471 | Aug 26, 2005 | Aug 26, 2005 | Southwestern Energy Prod. Co. | Angelina | Cameron #2 | 12,200 | 00530265 |
| 603696 | Aug 25, 2005 | Aug 25, 2005 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #5 | 12,200 | 42331983 |
| 603637 | Aug 25, 2005 | Aug 25, 2005 | Southwestern Energy Prod. Co. | Smith | Sallie M. Warren Hrs. Gas Unit 1 #6 | 12,450 | 42331982 |
| 605161 | Aug 19, 2005 | Aug 19, 2005 | Southwestern Energy Prod. Co. | Smith | Waldrop Gas Unit 1 #7 | 12,300 | 42332000 |
| 605160 | Aug 19, 2005 | Aug 19, 2005 | Southwestern Energy Prod. Co. | Smith | McRimmon Unit 1 #14 | 12,200 | 42331999 |
| 605158 | Aug 19, 2005 | Aug 19, 2005 | Southwestern Energy Prod. Co. | Smith | Waldrop Gas Unit 1 #8 | 12,350 | 42331998 |
| 604298 | Aug 3, 2005 | Aug 3, 2005 | Southwestern Energy Prod. Co. | Nacogdoches | Reavley #2 | 12,200 | 34732106 |
| 604298Amendment | Aug 3, 2005 | Aug 3, 2005 | Southwestern Energy Prod. Co. | Nacogdoches | Reavley #2 | 12,200 | 34732106 |
| 604283 | Aug 3, 2005 | Aug 3, 2005 | Southwestern Energy Prod. Co. | Smith | Kickapoo Creek Gas Unit 1 #17 | 12,200 | 42331991 |
| 603987 | Jul 27, 2005 | Jul 27, 2005 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 1 #11 | 12,000 | 42331989 |
| 603987Amendment | Jul 27, 2005 | Jul 27, 2005 | Southwestern Energy Prod. Co. | Smith | Arnold Gas Unit 1 #11 | 12,000 | 42331989 |
| 603981 | Jul 27, 2005 | Jul 27, 2005 | Southwestern Energy Prod. Co. | Smith | Woolf Gas Unit 1 #13 | 12,000 | 42331987 |
| 603525 | Jul 18, 2005 | Jul 18, 2005 | Southwestern Energy Prod. Co. | Smith | Kickapoo Creek Gas Unit 1 #14 | 12,200 | 42331981 |
| 603448 | Jul 15, 2005 | Jul 15, 2005 | Southwestern Energy Prod. Co. | Smith | Newsome Unit 1 #4 | 12,200 | 42331979 |
| 603442 | Jul 15, 2005 | Jul 15, 2005 | Southwestern Energy Prod. Co. | Smith | J. F. Ware Gas Unit 1 #11 | 12,200 | 42331978 |
| 603432 | Jul 15, 2005 | Jul 15, 2005 | Southwestern Energy Prod. Co. | Nueces | State Tract 433 Gas Unit #2 | 8,400 | 35533651 |
| 603449 | Jul 14, 2005 | Jul 14, 2005 | Southwestern Energy Prod. Co. | Smith | Vernon B. Wilson Gas Unit 1 #15 | 12,100 | 42331980 |
| 603438 | Jul 14, 2005 | Jul 14, 2005 | Southwestern Energy Prod. Co. | Smith | Shaw Gas Unit 1 #9 | 12,200 | 42331977 |
| 603116 | Jul 7, 2005 | Jul 7, 2005 | Southwestern Energy Prod. Co. | Cherokee | Bonnie Warner, et Al #1 | 11,900 | 07331138 |
| 602593 | Jun 28, 2005 | Jun 28, 2005 | Southwestern Energy Prod. Co. | Smith | Bright Gas Unit 1 #14 | 12,400 | 42331972 |
| 602592 | Jun 28, 2005 | Jun 28, 2005 | Southwestern Energy Prod. Co. | Smith | Morby Unit 1 #9 | 12,150 | 42331971 |
| 601969 | Jun 14, 2005 | Jun 14, 2005 | Southwestern Energy Prod. Co. | Nacogdoches | Winston #2 | 11,900 | 34732074 |
| 601968 | Jun 14, 2005 | Jun 14, 2005 | Southwestern Energy Prod. Co. | Smith | Milton Anderson Gas Unit 1 #12 | 12,200 | 42331966 |
| 560575 | Jun 8, 2005 | Jun 8, 2005 | Southwestern Energy Prod. Co. | Smith | Jerry Cross Gas Unit 1 #14 | 12,200 | 42331938 |
| 560574 | Jun 1, 2005 | Jun 1, 2005 | Southwestern Energy Prod. Co. | Smith | Milton Anderson Gas Unit 1 #14 | 12,100 | 42331939 |
| 600840 | May 19, 2005 | May 19, 2005 | Southwestern Energy Prod. Co. | Smith | Carrie Matlock Gas Unit 1 #14 | 12,250 | 42331960 |
| 600838 | May 19, 2005 | May 19, 2005 | Southwestern Energy Prod. Co. | Smith | Carrie Matlock Gas Unit 1 #16 | 12,400 | 42331959 |
| 600772 | May 18, 2005 | May 18, 2005 | Southwestern Energy Prod. Co. | Angelina | Weddington Est. #1 | 11,700 | 00530262 |
| 600772Amendment | May 18, 2005 | May 18, 2005 | Southwestern Energy Prod. Co. | Angelina | Weddington Est. #1 | 12,000 | 00530262 |
| 600771 | May 18, 2005 | May 18, 2005 | Southwestern Energy Prod. Co. | Cherokee | Afton Thrash Unit 1 #3 | 12,600 | 07331135 |
| 600585 | May 13, 2005 | May 13, 2005 | Southwestern Energy Prod. Co. | Smith | Bright Gas Unit 1 #16 | 12,400 | 42331957 |
| 600540 | May 12, 2005 | May 12, 2005 | Southwestern Energy Prod. Co. | Nacogdoches | Isaac #1 | 11,700 | 34732060 |
| 600539 | May 12, 2005 | May 12, 2005 | Southwestern Energy Prod. Co. | Smith | Morby Unit 1 #10 | 12,200 | 42331956 |
| 600538 | May 12, 2005 | May 12, 2005 | Southwestern Energy Prod. Co. | Cherokee | Afton Thrash Unit 1 #5 | 12,700 | 07331134 |
| 600350 | May 6, 2005 | May 6, 2005 | Southwestern Energy Prod. Co. | Smith | Vernon B. Wilson Gas Unit 1 #13 | 12,200 | 42331955 |
| 561027 | Apr 25, 2005 | Apr 25, 2005 | Southwestern Energy Prod. Co. | Smith | Sallie M. Warren Hrs. Gas Unit 1 #7 | 12,500 | 42331948 |
| 560746 | Apr 19, 2005 | Apr 19, 2005 | Southwestern Energy Prod. Co. | Nueces | State Tract 433 Gas Unit #2 | 8,828 | 35533651 |
| 560665 | Apr 18, 2005 | Apr 18, 2005 | Southwestern Energy Prod. Co. | Smith | Sallie M. Warren Hrs. Gas Unit 1 #5 | 12,450 | 42331942 |
| 560664 | Apr 18, 2005 | Apr 18, 2005 | Southwestern Energy Prod. Co. | Smith | Bright Gas Unit 1 #12 | 12,300 | 42331941 |
| 560663 | Apr 18, 2005 | Apr 18, 2005 | Southwestern Energy Prod. Co. | Smith | Waldrop Gas Unit 1 #5 | 12,450 | 42331940 |