| 486182 | Jul 27, 1999 | Jul 27, 1999 | Cross Timbers Operating Company | Terry | Prentice Northeast Unit #575 | 7,360 | 44531879 |
| 486181 | Jul 27, 1999 | Jul 27, 1999 | Cross Timbers Operating Company | Terry | Prentice Northeast Unit #582 | 7,360 | 44531878 |
| 486093 | Jul 23, 1999 | Jul 23, 1999 | Cross Timbers Operating Company | Andrews | State University AU #8HH | 10,800 | 00338263 |
| 485935 | Jul 19, 1999 | Jul 19, 1999 | Cross Timbers Operating Company | Andrews | University 9 C #6HH | 10,736 | 00338203 |
| 485847 | Jul 15, 1999 | Jul 15, 1999 | Cross Timbers Operating Company | Gregg | WSGU7 (Horton-Dickson B-1) #1 | 11,000 | 18330077 |
| 485784 | Jul 13, 1999 | Jul 13, 1999 | Cross Timbers Operating Company | Harrison | Hughes, Della #12 | 9,500 | 20332565 |
| 485784Amendment | Jul 13, 1999 | Jul 13, 1999 | Cross Timbers Operating Company | Harrison | Hughes, Della #12 | 9,500 | 20332565 |
| 485750 | Jul 12, 1999 | Jul 12, 1999 | Cross Timbers Operating Company | Harrison | Knox, Dee #10 | 9,500 | 20332564 |
| 485100 | Jul 7, 1999 | Jul 7, 1999 | Cross Timbers Operating Company | Crockett | Henderson 23 #4 | 9,100 | 10538074 |
| 485394 | Jun 24, 1999 | Jun 24, 1999 | Cross Timbers Operating Company | Gregg | WSGU8 (Horton-Dickson -25) #25 | 12,000 | 18331368 |
| 485099 | Jun 14, 1999 | Jun 14, 1999 | Cross Timbers Operating Company | Crockett | Henderson 23 #8 | 9,110 | 10538054 |
| 484978 | Jun 10, 1999 | Jun 10, 1999 | Cross Timbers Operating Company | Andrews | University Block 9/Penn/Unit #64 | 10,500 | 00338384 |
| 484852 | May 28, 1999 | May 28, 1999 | Cross Timbers Operating Company | Andrews | State University At #7 | 8,345 | 00338262 |
| 484852Amendment | May 28, 1999 | May 28, 1999 | Cross Timbers Operating Company | Andrews | University Block 9 Penn Unit #61 | 10,716 | 00338262 |
| 484606 | May 19, 1999 | May 19, 1999 | Cross Timbers Operating Company | Gregg | WSGU3 (Horton, Nancy -2) #9 | 12,000 | 18331364 |
| 484606Amendment | May 19, 1999 | May 19, 1999 | Cross Timbers Operating Company | Gregg | Wscgu (Horton, N.) #0402 | 12,000 | 18331364 |
| 484606Amendment | May 19, 1999 | May 19, 1999 | Cross Timbers Operating Company | Gregg | Wscgu (Horton, N.) #0402 | 12,000 | 18331364 |
| 484420 | May 11, 1999 | May 11, 1999 | Cross Timbers Operating Company | Henderson | Ogu (Saylors, M. -a- -10) #180 | 10,000 | 21330725 |
| 484269 | May 5, 1999 | May 5, 1999 | Cross Timbers Operating Company | Andrews | University Block 9 Penn Unit #18 | 10,605 | 00305164 |
| 484243 | May 5, 1999 | May 5, 1999 | Cross Timbers Operating Company | Andrews | University Block 9 Penn Unit #59 | 10,600 | 00334570 |
| 484205 | Apr 30, 1999 | Apr 30, 1999 | Cross Timbers Operating Company | Freestone | Newson, C.A. Estate #7 | 10,700 | 16131312 |
| 484144 | Apr 29, 1999 | Apr 29, 1999 | Cross Timbers Operating Company | Gregg | WSGU3 (Kelly -3) #5 | 9,100 | 18330998 |
| 484143 | Apr 28, 1999 | Apr 28, 1999 | Cross Timbers Operating Company | Gregg | WSGU10 (Walke -2) #5 | 10,600 | 18330686 |
| 484112 | Apr 27, 1999 | Apr 27, 1999 | Cross Timbers Operating Company | Gregg | WSGU2 (Robertson -6) #6 | 12,000 | 18331341 |
| 483918 | Apr 23, 1999 | Apr 23, 1999 | Cross Timbers Operating Company | Andrews | University 9 SD #3 | 5,880 | 00305276 |
| 483966 | Apr 22, 1999 | Apr 22, 1999 | Cross Timbers Operating Company | Henderson | Ogu (Corley, C. W. B-3) #96 | 10,610 | 21330473 |
| 483854 | Apr 15, 1999 | Apr 15, 1999 | Cross Timbers Operating Company | Gregg | WSGU9 (Horton-Dickson -21) #21 | 12,000 | 18331360 |
| 483751 | Apr 12, 1999 | Apr 12, 1999 | Cross Timbers Operating Company | Gregg | WSGU4 (Skipper -a- 2) #2 | 8,906 | 18330096 |
| 483170 | Mar 10, 1999 | Mar 10, 1999 | Cross Timbers Operating Company | Gregg | WSGU1 (Lacy E. -1) #1 | 7,347 | 18300154 |
| 483007 | Mar 2, 1999 | Mar 2, 1999 | Cross Timbers Operating Company | Robertson | Martin #1 Gas Unit #5 | 10,900 | 39530466 |
| 482925 | Feb 25, 1999 | Feb 25, 1999 | Cross Timbers Operating Company | Freestone | McWatters, T. H. #3 | 12,900 | 16131220 |
| 482924 | Feb 25, 1999 | Feb 25, 1999 | Cross Timbers Operating Company | Henderson | Ogu (Saylors, M. A-7) #141 | 10,150 | 21330601 |
| 482085 | Feb 16, 1999 | Feb 16, 1999 | Cross Timbers Operating Company | Freestone | McWatters, T. H. #3 | 12,900 | 16131220 |
| 482656 | Feb 12, 1999 | Feb 12, 1999 | Cross Timbers Operating Company | Gregg | WSGU1 (Lacy, E. -9) #9 | 11,000 | 18331355 |
| 482656Amendment | Feb 12, 1999 | Feb 12, 1999 | Cross Timbers Operating Company | Gregg | WSGU1 (Lacy, E. -9) #9 | 11,000 | 18331355 |
| 482656Amendment | Feb 12, 1999 | Feb 12, 1999 | Cross Timbers Operating Company | Gregg | WSGU1 (Lacy, E. -9) #9 | 11,000 | 18331355 |
| 482427 | Feb 4, 1999 | Feb 4, 1999 | Cross Timbers Operating Company | Gregg | WSGU7 (Horton-Dickson -23) #23 | 11,000 | 18331354 |
| 482427Amendment | Feb 4, 1999 | Feb 4, 1999 | Cross Timbers Operating Company | Gregg | WSGU7 (Horton-Dickson -23) #23 | 12,000 | 18331354 |
| 482392 | Feb 2, 1999 | Feb 2, 1999 | Cross Timbers Operating Company | Gregg | WSGU8 (Horton-Dickson -22) #22 | 11,000 | 18331353 |
| 482282 | Jan 29, 1999 | Jan 29, 1999 | Cross Timbers Operating Company | Andrews | University Block 9/Penn/Unit #26 | 9,250 | 00305165 |
| 482086 | Jan 20, 1999 | Jan 20, 1999 | Cross Timbers Operating Company | Gregg | WSGU9 (Horton-Dickson -20) #20 | 10,600 | 18331248 |
| 481976 | Jan 14, 1999 | Jan 14, 1999 | Cross Timbers Operating Company | Crockett | Henderson 23 #2 | 9,100 | 10535625 |
| 481944 | Jan 11, 1999 | Jan 11, 1999 | Cross Timbers Operating Company | Henderson | Ogu (Saylors, M. A-4) #77 | 10,203 | 21330435 |
| 481868 | Jan 5, 1999 | Jan 5, 1999 | Cross Timbers Operating Company | Freestone | Hanson Unit #1 | 7,600 | 16130853 |
| 481258 | Dec 15, 1998 | Dec 15, 1998 | Cross Timbers Operating Company | Gregg | WSGU10 (Walke-5) #8 | 12,000 | 18331350 |
| 481258Amendment | Dec 15, 1998 | Dec 15, 1998 | Cross Timbers Operating Company | Gregg | WSGU10 (Walke-5) #8 | 12,000 | 18331350 |
| 481268 | Dec 8, 1998 | Dec 8, 1998 | Cross Timbers Operating Company | Gregg | WSGU3 (R. Lacy -3) #7 | 10,700 | 18331219 |
| 480475 | Nov 25, 1998 | Nov 25, 1998 | Cross Timbers Operating Company | Harrison | Hughes, Della #11 | 9,500 | 20332555 |
| 480671 | Nov 6, 1998 | Nov 6, 1998 | Cross Timbers Operating Company | Henderson | Ogu (Lewis, J. H. -B- -7) #185 | 10,100 | 21330729 |
| 480661 | Nov 6, 1998 | Nov 6, 1998 | Cross Timbers Operating Company | Gregg | WSGU11 (Gray -3) #4 | 11,000 | 18331343 |
| 480661Amendment | Nov 6, 1998 | Nov 6, 1998 | Cross Timbers Operating Company | Gregg | WSGU11 (Gray -3) #4 | 11,000 | 18331343 |
| 480597 | Nov 5, 1998 | Nov 5, 1998 | Cross Timbers Operating Company | Henderson | Ogu (Asher, W. D. -2) #115 | 10,074 | 21330554 |
| 480450 | Oct 29, 1998 | Oct 29, 1998 | Cross Timbers Operating Company | Harrison | Hughes, Della #10 | 9,500 | 20332554 |
| 480479 | Oct 28, 1998 | Oct 28, 1998 | Cross Timbers Operating Company | Henderson | Ogu (Huff, C. C. -4) #119 | 12,050 | 21330575 |
| 479822 | Oct 28, 1998 | Oct 28, 1998 | Cross Timbers Operating Company | Harrison | Ledbetter-Jones #5 | 9,500 | 20332547 |
| 480160 | Oct 27, 1998 | Oct 27, 1998 | Cross Timbers Operating Company | Crockett | Scheuber, Jean "C" #13 | 8,582 | 10538018 |
| 480375 | Oct 26, 1998 | Oct 26, 1998 | Cross Timbers Operating Company | Gregg | WSGU2 (Robertson -7) #7 | 12,000 | 18331340 |
| 480375Amendment | Oct 26, 1998 | Oct 26, 1998 | Cross Timbers Operating Company | Gregg | WSGU2 (Robertson -7) #7 | 11,000 | 18331340 |
| 480375Amendment | Oct 26, 1998 | Oct 26, 1998 | Cross Timbers Operating Company | Gregg | WSGU2 (Robertson -7) #7 | 12,000 | 18331340 |
| 480376 | Oct 23, 1998 | Oct 23, 1998 | Cross Timbers Operating Company | Gregg | WSGU2 (Robertson -6) #6 | 12,000 | 18331341 |
| 480309 | Oct 21, 1998 | Oct 21, 1998 | Cross Timbers Operating Company | Henderson | Ogu (Hamill, S. -2) #173 | 10,000 | 21330717 |
| 480187 | Oct 16, 1998 | Oct 16, 1998 | Cross Timbers Operating Company | Henderson | Ogu (Tullos, J. W. -B- -6) #184 | 10,000 | 21330730 |
| 480161 | Oct 16, 1998 | Oct 16, 1998 | Cross Timbers Operating Company | Crockett | H & H Drilling Co. #6039 | 8,580 | 10538032 |
| 480159 | Oct 16, 1998 | Oct 16, 1998 | Cross Timbers Operating Company | Crockett | Jones Ranch B #8038 | 8,480 | 10538015 |
| 480153 | Oct 16, 1998 | Oct 16, 1998 | Cross Timbers Operating Company | Crockett | Henderson, Helen West "A" #4010 | 8,780 | 10538033 |
| 480052 | Oct 15, 1998 | Oct 15, 1998 | Cross Timbers Operating Company | Andrews | University Block 9/Penn/Unit #63 | 10,700 | 00338320 |
| 480084 | Oct 14, 1998 | Oct 14, 1998 | Cross Timbers Operating Company | Harrison | Crockett 'B' #5 | 9,500 | 20332549 |
| 480090 | Oct 13, 1998 | Oct 13, 1998 | Cross Timbers Operating Company | Henderson | Ogu (Corley, C. W. -B- -7) #181 | 10,000 | 21330726 |
| 479903 | Oct 12, 1998 | Oct 12, 1998 | Cross Timbers Operating Company | Gregg | WSGU9 (Horton-Dickson -5) #5 | 7,300 | 18300180 |
| 479901 | Oct 12, 1998 | Oct 12, 1998 | Cross Timbers Operating Company | Andrews | University Block 9/Penn/Unit #61 | 10,716 | 00338262 |
| 479901Amendment | Oct 12, 1998 | Oct 12, 1998 | Cross Timbers Operating Company | Andrews | University Block 9/Wolfcamp Unit #7AT | 10,120 | 00338262 |
| 480202 | Oct 10, 1998 | Oct 10, 1998 | Cross Timbers Operating Company | Andrews | University 9C #7H | 10,700 | 00338281 |
| 480025 | Oct 9, 1998 | Oct 9, 1998 | Cross Timbers Operating Company | Gregg | WSGU10 (Walke, John No. 4) #7 | 10,650 | 18331098 |
| 479902 | Oct 9, 1998 | Oct 9, 1998 | Cross Timbers Operating Company | Andrews | University Block 9/Penn/Unit #62 | 10,695 | 00338261 |
| 479670 | Oct 6, 1998 | Oct 6, 1998 | Cross Timbers Operating Company | Henderson | Ogu (Saylors, M. A-8) #163 | 9,900 | 21330681 |
| 481426 | Sep 28, 1998 | Sep 28, 1998 | Cross Timbers Operating Company | Andrews | State University AO #10H | 10,700 | 00338202 |
| 481426Amendment | Sep 28, 1998 | Sep 28, 1998 | Cross Timbers Operating Company | Andrews | State University AO #10HH | 10,700 | 00338202 |
| 479703 | Sep 25, 1998 | Sep 25, 1998 | Cross Timbers Operating Company | Andrews | Texas Q #8H | 10,700 | 00338335 |
| 479703Amendment | Sep 25, 1998 | Sep 25, 1998 | Cross Timbers Operating Company | Andrews | Texas Q #8HH | 10,700 | 00338335 |
| 479696 | Sep 25, 1998 | Sep 25, 1998 | Cross Timbers Operating Company | Andrews | Texas Q #4H | 10,512 | 00305635 |
| 479696Amendment | Sep 25, 1998 | Sep 25, 1998 | Cross Timbers Operating Company | Andrews | Texas Q #4HH | 10,512 | 00305635 |
| 479696Amendment | Sep 25, 1998 | Sep 25, 1998 | Cross Timbers Operating Company | Andrews | Texas Q #4HH | 10,512 | 00305635 |
| 479527 | Sep 21, 1998 | Sep 21, 1998 | Cross Timbers Operating Company | Harrison | Allen, W. H. Estate #8 | 9,500 | 20332543 |
| 479527Amendment | Sep 21, 1998 | Sep 21, 1998 | Cross Timbers Operating Company | Harrison | Allen, W. H. Estate #8 | 9,500 | 20332543 |
| 479366 | Sep 11, 1998 | Sep 11, 1998 | Cross Timbers Operating Company | Harrison | Howard-Jernigan #5 | 9,500 | 20332542 |
| 479173 | Sep 2, 1998 | Sep 2, 1998 | Cross Timbers Operating Company | Harrison | Knox, Dee #9 | 9,500 | 20332541 |
| 478797 | Aug 25, 1998 | Aug 25, 1998 | Cross Timbers Operating Company | Terry | Prentice Northeast Unit #154H | 6,890 | 44531075 |
| 477727 | Jul 10, 1998 | Jul 10, 1998 | Cross Timbers Operating Company | Andrews | University 9 AB #4 | 10,521 | 00300289 |
| 476812 | Jun 5, 1998 | Jun 5, 1998 | Cross Timbers Operating Company | Andrews | University 9 CE #E 7 | 10,800 | 00338438 |
| 473985 | May 21, 1998 | May 21, 1998 | Cross Timbers Operating Company | Crockett | Montgomery 2 #8 | 7,000 | 10538080 |
| 476080 | May 12, 1998 | May 12, 1998 | Cross Timbers Operating Company | Crockett | West, H. H. #2010 | 8,242 | 10535920 |
| 475913 | May 7, 1998 | May 7, 1998 | Cross Timbers Operating Company | Andrews | University 9 CE #C 6 | 10,800 | 00338424 |
| 473980 | May 5, 1998 | May 5, 1998 | Cross Timbers Operating Company | Crockett | Henderson 25 #12 | 9,000 | 10538075 |
| 473979 | May 5, 1998 | May 5, 1998 | Cross Timbers Operating Company | Crockett | Henderson 25 #11 | 9,000 | 10538076 |
| 473979Amendment | May 5, 1998 | May 5, 1998 | Cross Timbers Operating Company | Crockett | Henderson 25 #11 | 9,800 | 10538076 |
| 473978 | May 5, 1998 | May 5, 1998 | Cross Timbers Operating Company | Crockett | Henderson 25 #10 | 9,000 | 10538077 |
| 473976 | May 5, 1998 | May 5, 1998 | Cross Timbers Operating Company | Crockett | Henderson 25 #8 | 9,000 | 10538079 |
| 475071 | Apr 16, 1998 | Apr 16, 1998 | Cross Timbers Operating Company | Crockett | H&H Drilling #4039 | 9,000 | 10535917 |
| 475070 | Apr 16, 1998 | Apr 16, 1998 | Cross Timbers Operating Company | Crockett | Scheuber, Jean "C" #10 | 9,000 | 10537758 |
| 475069 | Apr 16, 1998 | Apr 16, 1998 | Cross Timbers Operating Company | Crockett | Jones Ranch #1026 | 9,000 | 10530860 |