| Korus Omega O-1-11429 | Great Plains Resources, Inc. | Somerset | Bexar | 40 | 5.44K | 21 | by Jan 1993 – Jun 1998 |
| Korus a Vas II O-1-11449 | Great Plains Resources, Inc. | Somerset | Bexar | 24 | 4.6K | 22 | by Jan 1993 – Jun 1998 |
| Tallman O-1-11186 | Great Plains Resources, Inc. | Somerset | Bexar | 31 | 4.03K | 25 | by Jan 1993 – May 1998 |
| Mullens "GMK" O-1-11467 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 3.77K | 20 | by Jan 1993 – Apr 1998 |
| Yturri Gotham O-1-11518 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 3.05K | 21 | by Jan 1993 – May 1997 |
| Yturri BRS -B- O-1-11404 | Great Plains Resources, Inc. | Somerset | Bexar | 18 | 3.01K | 21 | by Jan 1993 – May 1997 |
| Kurz, Eva O-1-9243 | Great Plains Resources, Inc. | Somerset | Bexar | 37 | 2.72K | 22 | by Jan 1993 – Apr 1998 |
| Gayle Omega "1985" O-1-11448 | Great Plains Resources, Inc. | Somerset | Bexar | 9 | 2.4K | 21 | by Jan 1993 – Apr 1998 |
| Richter, Emma F. O-1-10913 | Great Plains Resources, Inc. | Somerset | Bexar | 18 | 2.2K | 25 | by Jan 1993 – Mar 1997 |
| Thurman, A.V. O-1-10218 | Great Plains Resources, Inc. | Fairfield | Bexar | 37 | 1.98K | 20 | by Jan 1993 – May 1998 |
| Checkmate O-1-11753 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 1.88K | 26 | by Jan 1993 – Dec 1997 |
| Lehmberg O-1-11274 | Great Plains Resources, Inc. | Somerset | Bexar | 17 | 1.84K | 26 | by Jan 1993 – Apr 1998 |
| Korus -PRG- O-1-11633 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 1.75K | 15 | by Jan 1993 – Oct 1995 |
| Woodward-Heck O-1-10912 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 1.61K | 21 | by Jan 1993 – May 1998 |
| Silva -D- O-1-11192 | Great Plains Resources, Inc. | Somerset | Bexar | 6 | 1.49K | 24 | by Jan 1993 – May 1998 |
| Gonzales, Santiago O-1-11051 | Great Plains Resources, Inc. | Somerset | Bexar | 14 | 1.34K | 21 | by Jan 1993 – Oct 1995 |
| Beard, Lem O-1-11212 | Great Plains Resources, Inc. | Somerset | Bexar | 17 | 1.28K | 21 | by Jan 1993 – Apr 1998 |
| Jenkins, C. O-1-11277 | Great Plains Resources, Inc. | Somerset | Bexar | 11 | 1.27K | 25 | by Jan 1993 – Oct 1997 |
| Yturri-Harbo "1985" O-1-11389 | Great Plains Resources, Inc. | Somerset | Bexar | 9 | 1.25K | 20 | by Jan 1993 – May 1997 |
| Morris -B- O-1-11214 | Great Plains Resources, Inc. | Somerset | Bexar | 15 | 1.14K | 22 | by Jan 1993 – May 1998 |
| Baker Tract -B- O-1-12045 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 1.09K | 25 | by Jan 1993 – Oct 1995 |
| Avant -B- O-1-10966 | Great Plains Resources, Inc. | Somerset | Bexar | 10 | 1.08K | 16 | by 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 | by Jan 1993 – Apr 1998 |
| St John O-1-11148 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 1.01K | 21 | by Jan 1993 – Dec 1997 |
| Lewis, W&L O-1-10953 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 989 | 25 | by Jan 1993 – Oct 1997 |
| Koehler, Arthur J. O-1-10963 | Great Plains Resources, Inc. | Somerset | Bexar | 9 | 887 | 2 | by Jan 1993 – Apr 1998 |
| Wells, R.L. O-1-10954 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 863 | 25 | by Jan 1993 – Oct 1995 |
| Avant -A- O-1-10965 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 862 | 21 | by Jan 1993 – Apr 1998 |
| Gayle, Susie Knight O-1-9223 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 861 | 23 | by Jan 1993 – Dec 1995 |
| Hinton, R.S. -B- O-1-8207 | Great Plains Resources, Inc. | Somerset | Bexar | 12 | 842 | 19 | by Jan 1993 – Oct 1997 |
| Korus O-1-11020 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 827 | 21 | by Jan 1993 – Oct 1995 |
| Hubbard Omega "1985" O-1-11476 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 819 | 21 | by Jan 1993 – Apr 1998 |
| Lyons -A- O-1-11025 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 730 | 21 | by Jan 1993 – Dec 1994 |
| Uribe, Alicia O-1-10928 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 727 | 23 | by Jan 1993 – Jan 1998 |
| Bailey, John E. O-1-6221 | Great Plains Resources, Inc. | Fairfield | Bexar | 6 | 727 | 6 | Mar 1993 – May 1998 |
| Casias, Robert A. O-1-10773 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 725 | 24 | by Jan 1993 – Apr 1998 |
| Baker Tract -A- O-1-11908 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 694 | 23 | by Jan 1993 – Oct 1995 |
| Hubbard. Vas II O-1-11477 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 689 | 16 | by Jan 1993 – Apr 1998 |
| Thiel, C.C. O-1-11095 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 597 | 23 | Feb 1993 – May 1998 |
| Lewis, Ray O-1-9261 | Great Plains Resources, Inc. | Fairfield | Bexar | 3 | 592 | 11 | by Jan 1993 – May 1998 |
| Holub, Ernest O-1-6896 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 579 | 25 | by Jan 1993 – Oct 1995 |
| Dunn, Alice -A- O-1-10990 | Great Plains Resources, Inc. | Somerset | Bexar | 14 | 568 | 20 | by Jan 1993 – Apr 1998 |
| Barker -S- O-1-10942 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 562 | 15 | by Jan 1993 – Apr 1998 |
| Sanchez, B. Unit O-1-11080 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 552 | 26 | by Jan 1993 – Nov 1997 |
| Bursell -B- O-1-10979 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 519 | 21 | by Jan 1993 – Apr 1998 |
| Keller O-1-11635 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 494 | 25 | by Jan 1993 – Oct 1995 |
| Klemcke -B- O-1-11008 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 488 | 20 | by Jan 1993 – Aug 1996 |
| Thiel, M.C. O-1-11204 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 467 | 20 | by Jan 1993 – May 1998 |
| Koehler O-1-11305 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 452 | 88 | by Jan 1993 – Feb 2007 |