| 364103 | Sep 20, 1989 | Sep 20, 1989 | Columbia Gas Development Corp. | Garza | Resource #1 | 8,200 | 16932944 |
| 360723 | Jun 28, 1989 | Jun 28, 1989 | Columbia Gas Development Corp. | Galveston | Halls Bayou Ranch #1 | 10,500 | 16731168 |
| 357824 | Apr 10, 1989 | Apr 10, 1989 | Columbia Gas Development Corp. | Bee | McConnell, et Al #1 | 5,900 | 02532516 |
| 353326 | Nov 16, 1988 | Nov 16, 1988 | Columbia Gas Development Corp. | Colorado | Cgdc American Cometra Longan #1 | 12,200 | 08931752 |
| 351692 | Sep 30, 1988 | Sep 30, 1988 | Columbia Gas Development Corp. | Terry | Betzz #1 | 11,900 | 44531533 |
| 350770 | Sep 2, 1988 | Sep 2, 1988 | Columbia Gas Development Corp. | Howard | Middleton "A" #1 | 8,715 | 22734380 |
| 350212 | Aug 16, 1988 | Aug 16, 1988 | Columbia Gas Development Corp. | Hockley | Hartmangruber #1501 | 4,900 | 21935338 |
| 348801 | Jul 12, 1988 | Jul 12, 1988 | Columbia Gas Development Corp. | Burleson | Cgdc Sebesta #2 | 8,650 | 05133005 |
| 346095 | May 5, 1988 | May 5, 1988 | Columbia Gas Development Corp. | Stonewall | Helms #1 | 7,000 | 43332393 |
| 329280 | Apr 24, 1987 | Apr 24, 1987 | Columbia Gas Development Corp. | Zapata | Gonzalez, L. et Al. #1 | 8,500 | 50532314 |
| 327755 | Mar 25, 1987 | Mar 25, 1987 | Columbia Gas Development Corp. | Calhoun | R. W. Sanders Unit #1 | 8,800 | 05731374 |
| 327755Amendment | Mar 25, 1987 | Mar 25, 1987 | Columbia Gas Development Corp. | Calhoun | R. W. Sanders Unit #1 | 8,800 | 05731374 |
| 327754 | Mar 20, 1987 | Mar 20, 1987 | Columbia Gas Development Corp. | Calhoun | Cliburn Ranch #1 | 8,750 | 05731337 |
| 322569 | Nov 3, 1986 | Nov 3, 1986 | Columbia Gas Development Corp. | Howard | Wright Ranch #1 | 9,100 | 22734084 |
| 303508 | Jun 23, 1986 | Jun 23, 1986 | Columbia Gas Development Corp. | Brazoria | Sun Fee Unit #1 | 7,900 | 03932144 |
| 295699 | Jan 20, 1986 | Jan 20, 1986 | Columbia Gas Development Corp. | Nolan | Tupco/Bishop #1 | 7,200 | 35331927 |
| 293530 | Dec 23, 1985 | Dec 23, 1985 | Columbia Gas Development Corp. | Dawson | Tupco/Miller #1 | 12,300 | 11532334 |
| 283244 | Aug 22, 1985 | Aug 22, 1985 | Columbia Gas Development Corp. | Colorado | Irma Dahse Unit #1 | 10,500 | 08931611 |
| 282632 | Aug 14, 1985 | Aug 14, 1985 | Columbia Gas Development Corp. | Burleson | Jeffery, R. W. et UX #4 | 8,400 | 05132879 |
| 276821 | May 31, 1985 | May 31, 1985 | Columbia Gas Development Corp. | Galveston | Pathfinder Investments Unit #2 | 12,500 | 16731062 |
| 275275 | May 17, 1985 | May 17, 1985 | Columbia Gas Development Corp. | Calhoun | Cliburn Ranch #2 | 11,000 | 05731380 |
| 274743 | May 9, 1985 | May 9, 1985 | Columbia Gas Development Corp. | Calhoun | Welder Ranch Unit #1 | 12,000 | 05731377 |
| 272187 | Apr 12, 1985 | Apr 12, 1985 | Columbia Gas Development Corp. | Calhoun | R. W. Sanders Unit #1 | 10,275 | 05731374 |
| 261938 | Dec 21, 1984 | Dec 21, 1984 | Columbia Gas Development Corp. | Tyler | J. David Unit #1 | 12,000 | 45730370 |
| 260780 | Dec 12, 1984 | Dec 12, 1984 | Columbia Gas Development Corp. | Jefferson | Credo/Wilber, C. E. Estate #1 | 14,000 | 24531824 |
| 249891 | Aug 29, 1984 | Aug 29, 1984 | Columbia Gas Development Corp. | Calhoun | Cliburn Ranch #1 | 11,000 | 05731337 |
| 248998 | Aug 21, 1984 | Aug 21, 1984 | Columbia Gas Development Corp. | Galveston | Pathfinder Investments #1 | 13,000 | 16731013 |
| 248409 | Aug 15, 1984 | Aug 15, 1984 | Columbia Gas Development Corp. | Duval | Lopez, Jesus Jr., et Al #1 | 8,000 | 13136522 |
| 227464Amendment | Jan 24, 1984 | Jan 24, 1984 | Columbia Gas Development Corp. | Burleson | Laffere, Marvin #1 | 8,000 | 05132626 |
| 236319 | Dec 5, 1983 | Dec 5, 1983 | Columbia Gas Development Corp. | Lee | Bowers, J. A. Estate #2 | 9,000 | 28731609 |
| 223823 | Oct 17, 1983 | Oct 17, 1983 | Columbia Gas Development Corp. | Brazoria | Murray, Lula P. Estate #1 | 15,500 | 03931922 |
| 209346 | Sep 2, 1983 | Sep 2, 1983 | Columbia Gas Development Corp. | Brazoria | Lula P. Murray Estate Unit #1 | 15,500 | 03931922 |
| 205318 | Aug 8, 1983 | Aug 8, 1983 | Columbia Gas Development Corp. | Burleson | Calvin Kocurek et al Unit #1 | 8,105 | 05130548 |
| 191296 | Apr 12, 1983 | Apr 12, 1983 | Columbia Gas Development Corp. | Lee | Ira J. Lehmann Unit #1 | 8,499 | 28730935 |
| 188036 | Mar 9, 1983 | Mar 9, 1983 | Columbia Gas Development Corp. | Lee | Bowers, Linden & Frank #6 | 7,990 | 28731064 |
| 163073 | Jun 4, 1982 | Jun 4, 1982 | Columbia Gas Development Corp. | Burleson | Tyson, Scott #4 | 8,500 | 05132272 |
| 161059 | May 18, 1982 | May 18, 1982 | Columbia Gas Development Corp. | Burleson | Raymond Zgabay Unit #4 | 8,050 | 05132251 |
| 163094 | May 6, 1982 | May 6, 1982 | Columbia Gas Development Corp. | Burleson | Dickens, Raymond Jr. #1 | 11,000 | 05131773 |
| 156668 | Apr 8, 1982 | Apr 8, 1982 | Columbia Gas Development Corp. | Burleson | Columbus Professional Bldgs Inc. #3 | 8,500 | 05132211 |
| 154899 | Mar 12, 1982 | Mar 12, 1982 | Columbia Gas Development Corp. | Burleson | Zgabay, Raymond #3 | 8,400 | 05132202 |
| 154597 | Feb 25, 1982 | Feb 25, 1982 | Columbia Gas Development Corp. | Lee | Zgabay, Edwin #6 | 8,200 | 28731209 |
| 151141 | Feb 11, 1982 | Feb 11, 1982 | Columbia Gas Development Corp. | Burleson | Kristof, Frank Unit #1 | 8,100 | 05132098 |
| 147754 | Dec 29, 1981 | Dec 29, 1981 | Columbia Gas Development Corp. | Burleson | J.K. Pearce Unit #2 | 8,200 | 05132086 |
| 146293 | Nov 4, 1981 | Nov 4, 1981 | Columbia Gas Development Corp. | Burleson | Marion J. Filippone Fee #6 | 8,400 | 05131876 |
| 137341 | Oct 20, 1981 | Oct 20, 1981 | Columbia Gas Development Corp. | Burleson | Alvin Kucera Unit #1 | 8,200 | 05131938 |
| 135733 | Oct 7, 1981 | Oct 7, 1981 | Columbia Gas Development Corp. | Lee | Bowers, Linden & Frank #6 | 8,200 | 28731064 |
| 134574 | Sep 25, 1981 | Sep 25, 1981 | Columbia Gas Development Corp. | Lee | Kunkel, O.W. Unit #1 | 9,900 | 28731057 |
| 134551 | Sep 11, 1981 | Sep 11, 1981 | Columbia Gas Development Corp. | Burleson | Filippone, Marion J. Fee #5 | 8,400 | 05131846 |
| 129578 | Aug 11, 1981 | Aug 11, 1981 | Columbia Gas Development Corp. | Burleson | Filippone, Marion J. Fee #7 | 8,200 | 05131809 |
| 128323 | Aug 3, 1981 | Aug 3, 1981 | Columbia Gas Development Corp. | Burleson | Dickens, Raymond Jr. #1 | 11,000 | 05131773 |
| 126786 | Jul 24, 1981 | Jul 24, 1981 | Columbia Gas Development Corp. | Burleson | Schoppe, Emily K. Unit #1 | 8,800 | 05131749 |
| 126759 | Jul 24, 1981 | Jul 24, 1981 | Columbia Gas Development Corp. | Lee | Lehmann, Ira J. Unit #3 | 9,600 | 28731012 |
| 126752 | Jul 24, 1981 | Jul 24, 1981 | Columbia Gas Development Corp. | Lee | Lehmann, Ira J. Unit #4 | 9,900 | 28731011 |
| 121830 | Jun 12, 1981 | Jun 12, 1981 | Columbia Gas Development Corp. | Lee | Lehmann, Ira J. Unit #2 | 9,900 | 28730975 |
| 115992 | Apr 22, 1981 | Apr 22, 1981 | Columbia Gas Development Corp. | Lee | Lehmann, Ira J. Unit #1 | 9,900 | 28730935 |
| 110727 | Mar 4, 1981 | Mar 4, 1981 | Columbia Gas Development Corp. | Lee | Sommer, L.C. Unit #1 | 9,915 | 28730894 |
| 110275 | Mar 2, 1981 | Mar 2, 1981 | Columbia Gas Development Corp. | Lee | Bowers, L. & F. #4 | 8,500 | 28730878 |
| 110271 | Mar 2, 1981 | Mar 2, 1981 | Columbia Gas Development Corp. | Lee | Bowers, Linden & Frank #5 | 8,850 | 28730877 |
| 109365 | Feb 23, 1981 | Feb 23, 1981 | Columbia Gas Development Corp. | Burleson | Lednicky, C. A. Unit #1 | 9,200 | 05131359 |
| 107260 | Feb 2, 1981 | Feb 2, 1981 | Columbia Gas Development Corp. | Lee | Bowers, Linden & Frank #3 | 8,500 | 28730903 |
| 107186 | Feb 2, 1981 | Feb 2, 1981 | Columbia Gas Development Corp. | Burleson | Ragsdale, Mary L. #1 | 8,700 | 05131311 |
| 104299 | Dec 31, 1980 | Dec 31, 1980 | Columbia Gas Development Corp. | Burleson | Jeffery, Roger W., Jr. et UX #3 | 8,500 | 05131253 |
| 104298 | Dec 31, 1980 | Dec 31, 1980 | Columbia Gas Development Corp. | Burleson | Pearce, J. K. #1 | 8,500 | 05131252 |
| 103549 | Dec 19, 1980 | Dec 19, 1980 | Columbia Gas Development Corp. | Burleson | Filippone, Marion J. Fee #4 | 8,500 | 05131237 |
| 102077 | Dec 8, 1980 | Dec 8, 1980 | Columbia Gas Development Corp. | Burleson | Krueger, W. H. & J. T. Unit #1 | 8,500 | 05131213 |
| 98952 | Nov 7, 1980 | Nov 7, 1980 | Columbia Gas Development Corp. | Burleson | Wendland, Daniel A. #1 | 8,500 | 05131148 |
| 96548 | Oct 23, 1980 | Oct 23, 1980 | Columbia Gas Development Corp. | Lee | Bowers, L. & F. #2 | 8,500 | 28730808 |
| 96079 | Oct 20, 1980 | Oct 20, 1980 | Columbia Gas Development Corp. | Burleson | Brock, Williard #1 | 8,500 | 05131107 |
| 95161 | Oct 6, 1980 | Oct 6, 1980 | Columbia Gas Development Corp. | Burleson | Jeffery, Roger W., Jr. et UX #2 | 8,500 | 05131074 |
| 93732 | Sep 18, 1980 | Sep 18, 1980 | Columbia Gas Development Corp. | Burleson | Columbus Professional Bldgs, Inc #2 | 8,500 | 05131045 |
| 90954 | Aug 22, 1980 | Aug 22, 1980 | Columbia Gas Development Corp. | Lee | Bowers, Linden & Frances #1 | 8,500 | 28730777 |
| 86463 | Jul 14, 1980 | Jul 14, 1980 | Columbia Gas Development Corp. | Burleson | Gaas, Willie Unit #1 | 8,500 | 05130862 |
| 86460 | Jul 9, 1980 | Jul 9, 1980 | Columbia Gas Development Corp. | Lee | Lehmann, Waldemar L. #1 | 8,200 | 28730743 |
| 85789 | Jul 3, 1980 | Jul 3, 1980 | Columbia Gas Development Corp. | Burleson | Hodde, A. W. Jr. et Al #1 | 8,500 | 05130848 |
| 82779 | Jun 3, 1980 | Jun 3, 1980 | Columbia Gas Development Corp. | Burleson | Sebasta, Robert T. #1 | 8,500 | 05130791 |
| 80159 | May 2, 1980 | May 2, 1980 | Columbia Gas Development Corp. | Burleson | Columbus Professional Bldgs,inc. #1 | 8,500 | 05130740 |
| 78454 | Apr 16, 1980 | Apr 16, 1980 | Columbia Gas Development Corp. | Burleson | Goodnight, T. L. Jr. #1 | 8,500 | 05130716 |
| 77740 | Apr 9, 1980 | Apr 9, 1980 | Columbia Gas Development Corp. | Lee | Bowers, J. A., Estate #1 | 8,500 | 28730666 |
| 75440 | Mar 18, 1980 | Mar 18, 1980 | Columbia Gas Development Corp. | Burleson | Tyson, Scott #3 | 8,500 | 05130669 |
| 75437 | Mar 13, 1980 | Mar 13, 1980 | Columbia Gas Development Corp. | Burleson | Parker, Marcie B. et al Unit #1 | 8,500 | 05130668 |
| 73802 | Feb 25, 1980 | Feb 25, 1980 | Columbia Gas Development Corp. | Burleson | Davis, et al, Unit #1 | 8,500 | 05130640 |
| 70639 | Jan 23, 1980 | Jan 23, 1980 | Columbia Gas Development Corp. | Burleson | Tyson, Scott #2 | 8,500 | 05130596 |
| 67899 | Dec 31, 1979 | Dec 31, 1979 | Columbia Gas Development Corp. | Burleson | Thompson et al Unit #1 | 8,500 | 05130549 |
| 67860 | Dec 28, 1979 | Dec 28, 1979 | Columbia Gas Development Corp. | Burleson | Thompson et Al #2 | 8,500 | 05130546 |
| 67857 | Dec 28, 1979 | Dec 28, 1979 | Columbia Gas Development Corp. | Burleson | Muzny, Ray #1 | 8,500 | 05130545 |
| 67891 | Dec 20, 1979 | Dec 20, 1979 | Columbia Gas Development Corp. | Burleson | Kocurek, Calvin et al Unit #1 | 8,500 | 05130548 |
| 66914 | Dec 10, 1979 | Dec 10, 1979 | Columbia Gas Development Corp. | Burleson | Zgabay, Raymond #2 | 8,500 | 05130538 |
| 64801 | Nov 28, 1979 | Nov 28, 1979 | Columbia Gas Development Corp. | Burleson | Urbanovsky NO.1 #1 | 8,500 | 05130515 |
| 64799 | Nov 28, 1979 | Nov 28, 1979 | Columbia Gas Development Corp. | Burleson | Kucera, Agnes et Al #1 | 8,500 | 05130514 |
| 63232 | Nov 2, 1979 | Nov 2, 1979 | Columbia Gas Development Corp. | Lee | Zgabay, Edwin #2 | 8,500 | 28730584 |
| 61767 | Oct 23, 1979 | Oct 23, 1979 | Columbia Gas Development Corp. | Burleson | Zgabay, Raymond #1 | 8,500 | 05130483 |
| 55382 | Aug 9, 1979 | Aug 9, 1979 | Columbia Gas Development Corp. | Burleson | Tyson, Scott #1 | 9,000 | 05130431 |
| 53643 | Jul 23, 1979 | Jul 23, 1979 | Columbia Gas Development Corp. | Burleson | Tietjen, Anthony H.jr, et UX Fee #1 | 9,000 | 05130424 |
| 51596 | Jun 22, 1979 | Jun 22, 1979 | Columbia Gas Development Corp. | Burleson | Jeffery, Roger W. Jr., et UX Fee #1 | 8,280 | 05130405 |
| 49990 | Jun 4, 1979 | Jun 4, 1979 | Columbia Gas Development Corp. | Burleson | Filippone, Marion J. - Fee #3 | 8,300 | 05130397 |
| 48495 | May 11, 1979 | May 11, 1979 | Columbia Gas Development Corp. | Burleson | Filippone, Marion J. Fee #2 | 8,000 | 05130386 |
| 46430 | Apr 11, 1979 | Apr 11, 1979 | Columbia Gas Development Corp. | Burleson | Pivonka Unit #1 | 9,020 | 05130383 |
| 40026 | Dec 29, 1978 | Dec 29, 1978 | Columbia Gas Development Corp. | Burleson | Gaas, George et UX Fee Unit #1 | 9,300 | 05130366 |
| 36933 | Nov 15, 1978 | Nov 15, 1978 | Columbia Gas Development Corp. | Burleson | Corbin #1 | 7,500 | 05130361 |
| 31399 | Aug 23, 1978 | Aug 23, 1978 | Columbia Gas Development Corp. | Burleson | Fillippone Unit #1 | 9,000 | 05130347 |