| Wright, Gertrude O-1-3604 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 8 | 5.45K | 26 | Jan 1993 – Dec 1997 |
| Korus Omega O-1-11429 | Great Plains Resources, Inc. | Somerset | Bexar | 40 | 5.44K | 21 | Jan 1993 – Jun 1998 |
| Korus a Vas II O-1-11449 | Great Plains Resources, Inc. | Somerset | Bexar | 24 | 4.6K | 22 | Jan 1993 – Jun 1998 |
| Lawler, Maurice, Etal O-1-3519 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 17 | 4.05K | 27 | Jan 1993 – Dec 1997 |
| Tallman O-1-11186 | Great Plains Resources, Inc. | Somerset | Bexar | 31 | 4.03K | 25 | Jan 1993 – May 1998 |
| Mullens "GMK" O-1-11467 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 3.77K | 20 | Jan 1993 – Apr 1998 |
| Yturri Gotham O-1-11518 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 3.05K | 21 | Jan 1993 – May 1997 |
| Yturri BRS -B- O-1-11404 | Great Plains Resources, Inc. | Somerset | Bexar | 18 | 3.01K | 21 | Jan 1993 – May 1997 |
| Bozarth, T. M. O-1-139 | Great Plains Resources, Inc. | Buchanan | Caldwell | 13 | 2.73K | 8 | Apr 1993 – Jun 1998 |
| Kurz, Eva O-1-9243 | Great Plains Resources, Inc. | Somerset | Bexar | 37 | 2.72K | 22 | Jan 1993 – Apr 1998 |
| Gayle Omega "1985" O-1-11448 | Great Plains Resources, Inc. | Somerset | Bexar | 9 | 2.4K | 21 | Jan 1993 – Apr 1998 |
| Richter, Emma F. O-1-10913 | Great Plains Resources, Inc. | Somerset | Bexar | 18 | 2.2K | 25 | Jan 1993 – Mar 1997 |
| Watkins, Sara O-1-2959 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 17 | 2.17K | 10.8K | Jan 1993 – Jun 1998 |
| Thurman, A.V. O-1-10218 | Great Plains Resources, Inc. | Fairfield | Bexar | 37 | 1.98K | 20 | Jan 1993 – May 1998 |
| Checkmate O-1-11753 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 1.88K | 26 | Jan 1993 – Dec 1997 |
| Lehmberg O-1-11274 | Great Plains Resources, Inc. | Somerset | Bexar | 17 | 1.84K | 26 | Jan 1993 – Apr 1998 |
| Zoboroski, Fred O-1-3514 | Great Plains Resources, Inc. | Darst Creek (Buda) | Guadalupe | 9 | 1.77K | 1.64K | Feb 1993 – Oct 1995 |
| Korus -PRG- O-1-11633 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 1.75K | 15 | Jan 1993 – Oct 1995 |
| Geyer O-1-10769 | Great Plains Resources, Inc. | Somerset | Atascosa | 15 | 1.75K | 26 | Jan 1993 – Apr 1998 |
| Woodward-Heck O-1-10912 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 1.61K | 21 | Jan 1993 – May 1998 |
| Wood, Mae Lou O-1-11096 | Great Plains Resources, Inc. | Somerset | Atascosa | 18 | 1.59K | 25 | Jan 1993 – May 1998 |
| Cooper -T- O-1-11073 | Great Plains Resources, Inc. | Somerset | Atascosa | 6 | 1.54K | 26 | Jan 1993 – May 1998 |
| Cooper -F- O-1-10983 | Great Plains Resources, Inc. | Somerset | Atascosa | 13 | 1.49K | 26 | Jan 1993 – May 1998 |
| Silva -D- O-1-11192 | Great Plains Resources, Inc. | Somerset | Bexar | 6 | 1.49K | 24 | Jan 1993 – May 1998 |
| Walker, Mrs. G. C. -B- O-1-4260 | Great Plains Resources, Inc. | Dunlap | Caldwell | 12 | 1.44K | 21 | Jan 1993 – Jun 1998 |
| Gonzales, Santiago O-1-11051 | Great Plains Resources, Inc. | Somerset | Bexar | 14 | 1.34K | 21 | Jan 1993 – Oct 1995 |
| Beard, Lem O-1-11212 | Great Plains Resources, Inc. | Somerset | Bexar | 17 | 1.28K | 21 | Jan 1993 – Apr 1998 |
| Fowler, F.J. O-1-10855 | Great Plains Resources, Inc. | Somerset | Atascosa | 5 | 1.27K | 25 | Jan 1993 – Dec 1997 |
| Jenkins, C. O-1-11277 | Great Plains Resources, Inc. | Somerset | Bexar | 11 | 1.27K | 25 | Jan 1993 – Oct 1997 |
| Yturri-Harbo "1985" O-1-11389 | Great Plains Resources, Inc. | Somerset | Bexar | 9 | 1.25K | 20 | Jan 1993 – May 1997 |
| Farran O-1-11548 | Great Plains Resources, Inc. | Somerset | Atascosa | 7 | 1.25K | 26 | Jan 1993 – May 1998 |
| Cooper -C- O-1-10982 | Great Plains Resources, Inc. | Somerset | Atascosa | 6 | 1.15K | 25 | Jan 1993 – May 1998 |
| Morris -B- O-1-11214 | Great Plains Resources, Inc. | Somerset | Bexar | 15 | 1.14K | 22 | Jan 1993 – May 1998 |
| Baker Tract -B- O-1-12045 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 1.09K | 25 | Jan 1993 – Oct 1995 |
| Avant -B- O-1-10966 | Great Plains Resources, Inc. | Somerset | Bexar | 10 | 1.08K | 16 | Jan 1993 – Apr 1998 |
| Roegelein O-1-8078 | Great Plains Resources, Inc. | Fairfield | Bexar | 23 | 1.07K | 0 | Jun 1995 – May 1998 |
| Barker O-1-11154 | Great Plains Resources, Inc. | Somerset | Bexar | 6 | 1.06K | 21 | Jan 1993 – Apr 1998 |
| Hardeman, E. J., Est. O-1-3031 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 3 | 1.03K | 1.39K | Jan 1993 – Jun 1998 |
| Buchsenschutz, R. O-1-10761 | Great Plains Resources, Inc. | Somerset | Atascosa | 9 | 1.01K | 25 | Jan 1993 – Oct 1995 |
| St John O-1-11148 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 1.01K | 21 | Jan 1993 – Dec 1997 |
| Lewis, W&L O-1-10953 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 989 | 25 | Jan 1993 – Oct 1997 |
| Lawler, Maurice North O-1-13849 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 6 | 986 | 3 | Apr 1994 – Dec 1997 |
| Cooper -P- O-1-10987 | Great Plains Resources, Inc. | Somerset | Atascosa | 11 | 959 | 26 | Jan 1993 – May 1998 |
| Cooper -K- O-1-10986 | Great Plains Resources, Inc. | Somerset | Atascosa | 7 | 958 | 21 | Jan 1993 – May 1998 |
| Tiller, J. R. O-1-3594 | Great Plains Resources, Inc. | Tenney Creek | Caldwell | 5 | 922 | 1.07K | Jan 1993 – Jun 1998 |
| Cooper -Y- O-1-10989 | Great Plains Resources, Inc. | Somerset | Atascosa | 7 | 901 | 21 | Jan 1993 – May 1998 |
| Bridges, A. C. O-1-3931 | Great Plains Resources, Inc. | Dunlap | Caldwell | 8 | 891 | 13 | Jan 1993 – Jun 1998 |
| Koehler, Arthur J. O-1-10963 | Great Plains Resources, Inc. | Somerset | Bexar | 9 | 887 | 2 | Jan 1993 – Apr 1998 |
| Ricks, E. et Al O-1-10808 | Great Plains Resources, Inc. | Somerset | Atascosa | 6 | 880 | 17 | Jan 1993 – May 1998 |
| Wells, R.L. O-1-10954 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 863 | 25 | Jan 1993 – Oct 1995 |