| Gayle Unit O-1-10997 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 185 | 20 | by Jan 1993 – Oct 1995 |
| Hanson, R.B. O-1-10930 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 178 | 21 | by Jan 1993 – Apr 1998 |
| Kelley, J. J. O-1-1038 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 2 | 175 | 0 | Oct 1994 – Jun 1998 |
| Kurz, Eva -A- O-1-6755 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 172 | 8 | Nov 1993 – Apr 1998 |
| Quesada O-1-11042 | Great Plains Resources, Inc. | Somerset | Atascosa | 9 | 171 | 12 | by Jan 1993 – Dec 1997 |
| Wondra, Melvin O-1-10584 | Great Plains Resources, Inc. | Fairfield | Bexar | 4 | 169 | 19 | by Jan 1993 – Oct 1995 |
| Johnson, T. C. O-1-3199 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 8 | 168 | 29 | by Jan 1993 – Dec 1997 |
| Eastwood -A- O-1-11794 | Great Plains Resources, Inc. | Somerset | Atascosa | 2 | 167 | 12 | by Jan 1993 – Oct 1995 |
| Losoya O-1-10935 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 165 | 18 | by Jan 1993 – Apr 1998 |
| Reitzer -A- O-1-11043 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 160 | 11 | by Jan 1993 – May 1995 |
| Eklund, Carl, -A- O-1-3880 | Great Plains Resources, Inc. | Salt Flat | Caldwell | 1 | 159 | 129 | by Jan 1993 – Sep 1997 |
| Nichols, L. O-1-1637 | Great Plains Resources, Inc. | Somerset | Atascosa | 4 | 156 | 10 | Aug 1993 – Jan 1996 |
| Cegelski, John J. Jr. O-1-11213 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 156 | 18 | Apr 1993 – Oct 1995 |
| Reitzer, Joel O-1-7816 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 155 | 16 | by Jan 1993 – Nov 1996 |
| Barker, Perry O-1-7335 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 155 | 17 | by Jan 1993 – Apr 1998 |
| Smith, Bennett O-1-11185 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 151 | 24 | by Jan 1993 – Dec 1997 |
| Dunn -F- O-1-12088 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 149 | 23 | by Jan 1993 – Apr 1998 |
| Kenney, W. P. O-1-3043 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 146 | 9 | May 1993 – Dec 1997 |
| Cooper -P-3 O-1-11538 | Great Plains Resources, Inc. | Somerset | Atascosa | 2 | 144 | 25 | by Jan 1993 – May 1998 |
| Barker -C- O-1-10973 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 141 | 13 | by Jan 1993 – Nov 1997 |
| Baker "A" O-1-3847 | Great Plains Resources, Inc. | Dunlap | Guadalupe | 3 | 139 | 113 | by Jan 1993 – May 1997 |
| Ernst, Herbert -C- O-1-10992 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 137 | 19 | by Jan 1993 – Oct 1995 |
| Pickens, Stage -E- O-1-11077 | Great Plains Resources, Inc. | Somerset | Atascosa | 5 | 130 | 7 | Aug 1993 – May 1998 |
| Watts, Otto O-1-6666 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 127 | 11 | Mar 1993 – Oct 1995 |
| Cain, Joseph A. O-1-6843 | Great Plains Resources, Inc. | Fairfield | Bexar | 1 | 123 | 6 | Mar 1993 – Jun 1997 |
| Wiemers O-1-11067 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 121 | 11 | by Jan 1993 – Dec 1997 |
| Aldridge Nursery, Inc. O-1-9561 | Great Plains Resources, Inc. | Fairfield | Bexar | 2 | 121 | 6 | by Jan 1993 – May 1998 |
| Sal Mar "B" O-1-11420 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 114 | 13 | May 1993 – Oct 1995 |
| McOsker -B- O-1-10905 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 112 | 4 | by Jan 1993 – Apr 1998 |
| Sanchez & Gonzales, O.C. O-1-11149 | Great Plains Resources, Inc. | Somerset | Bexar | 6 | 111 | 14 | by Jan 1993 – Oct 1995 |
| Langley Hrs. O-1-1634 | Great Plains Resources, Inc. | Somerset | Atascosa | 7 | 110 | 16 | May 1993 – May 1998 |
| Nichols -B- O-1-10782 | Great Plains Resources, Inc. | Somerset | Atascosa | 3 | 109 | 12 | by Jan 1993 – Nov 1997 |
| Lueders-Pegg Unit O-1-11262 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 108 | 13 | by Jan 1993 – Apr 1998 |
| O'Brien -C- O-1-11035 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 107 | 8 | by Jan 1993 – Apr 1998 |
| Tick, Steve O-1-1644 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 106 | 14 | by Jan 1993 – Oct 1997 |
| Avant -D- O-1-10968 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 106 | 10 | by Jan 1993 – Apr 1998 |
| Kelly, J.J. -B- O-1-6860 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 1 | 105 | 0 | Oct 1994 – Jun 1998 |
| Morgan O-1-11194 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 104 | 9 | by Jan 1993 – Nov 2016 |
| Lyons O-1-7103 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 104 | 21 | by Jan 1993 – Aug 1996 |
| Chapman, G. O-1-12300 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 1 | 103 | 9 | by Jan 1993 – Oct 1995 |
| Vogt O-1-11443 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 100 | 14 | by Jan 1993 – Oct 1995 |
| Ellison O-1-8552 | Great Plains Resources, Inc. | Salt Flat | Caldwell | 1 | 98 | 3 | Feb 1993 – Oct 1995 |
| Gonzales, Santiago et UX, et Al O-1-7246 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 94 | 16 | by Jan 1993 – Oct 1995 |
| Gonzales, Santiago -C- O-1-11052 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 93 | 15 | by Jan 1993 – Oct 1995 |
| Armstrong -B- I O-1-11313 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 93 | 19 | Feb 1993 – Oct 1995 |
| Ricks, S. E. O-1-1640 | Great Plains Resources, Inc. | Somerset | Atascosa | 3 | 93 | 16 | by Jan 1993 – Dec 1997 |
| Klemcke -M- O-1-11009 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 93 | 12 | by Jan 1993 – Aug 1996 |
| Sanchez & Gonzales O-1-11049 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 86 | 14 | by Jan 1993 – Oct 1995 |
| Kours, South O-1-11021 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 82 | 10 | by Jan 1993 – Sep 1995 |
| Langley, A. G. O-1-1633 | Great Plains Resources, Inc. | Somerset | Atascosa | 4 | 80 | 7 | May 1993 – May 1998 |