| Amacker Trust 36 G-9-207336 | Tippett (Leonard, Lower) | Crockett | 1 | 20.6K | 314K | Oct 2004 – Apr 2026 |
| Pierce-Arrow G-9-144807 | Ozona (Canyon Sand) | Crockett | 1 | 20.1K | 1.13M | Mar 1993 – Apr 2026 |
| Pierce, V. I. "D" G-9-143264 | Ozona (Canyon Sand) | Crockett | 1 | 18.8K | 719K | Jan 1993 – Apr 2026 |
| Pierce, V. I. G-9-144809 | Ozona (Canyon Sand) | Crockett | 1 | 17.5K | 2.01M | Mar 1993 – Apr 2026 |
| Pierce, V. I. (NCT-F2) G-9-143774 | Ozona (Canyon Sand) | Crockett | 1 | 17.1K | 1M | Jan 1993 – Apr 2026 |
| Universityvincent G-9-215706 | Blue Danube, E. (Penn. Detrital) | Upton | 1 | 16.9K | 740K | Dec 2005 – Apr 2026 |
| Pierce DF Unit, V. I. G-9-144133 | Ozona (Canyon Sand) | Crockett | 1 | 13.6K | 804K | Jan 1993 – Apr 2026 |
| Pierce State "a", V.I. G-9-143777 | Ozona (Canyon Sand) | Crockett | 1 | 10.6K | 707K | Jan 1993 – Apr 2026 |
| Pierce, V.I. G-9-144810 | Ozona (Canyon Sand) | Crockett | 1 | 10.3K | 1.06M | Mar 1993 – Apr 2026 |
| Childress Ranch G-9-147202 | Ozona (Canyon Sand) | Crockett | 1 | 10.1K | 833K | Oct 1993 – Apr 2026 |
| Pierce, V. I. State 'A' G-9-143262 | Ozona (Canyon Sand) | Crockett | 1 | 9.78K | 971K | Jan 1993 – Apr 2026 |
| Pierce "E", V. I. G-9-146438 | Ozona (Canyon Sand) | Crockett | 1 | 9.71K | 492K | Aug 1993 – Apr 2026 |
| Pierce, V. I. "D" G-9-143265 | Ozona (Canyon Sand) | Crockett | 1 | 9.26K | 1.22M | Jan 1993 – Apr 2026 |
| Pierce-Arrow G-9-145955 | Ozona (Canyon Sand) | Crockett | 1 | 8.96K | 1.11M | Jul 1993 – Apr 2026 |
| Childress Ranch G-9-148789 | Ozona (Canyon Sand) | Crockett | 1 | 8.91K | 800K | Mar 1994 – Apr 2026 |
| Pierce, V. I. "D" G-9-142869 | Ozona (Canyon Sand) | Crockett | 1 | 8.72K | 647K | Jan 1993 – Apr 2026 |
| Pierce State "a" (NCT-C), W.I. G-9-142310 | Ozona (Canyon Sand) | Crockett | 1 | 7.36K | 903K | Jan 1993 – Apr 2026 |
| Pierce, V. I. State 'A' G-9-143375 | Ozona (Canyon Sand) | Crockett | 1 | 6.34K | 966K | Jan 1993 – Apr 2026 |
| Sealy & Smith "33-B" G-10-285920 | Arenoso (Strawn Detritus) | Winkler | 1 | 5.9K | 4.02K | Dec 2018 – Apr 2026 |
| Childress Ranch G-9-146550 | Ozona (Canyon Sand) | Crockett | 1 | 5.44K | 306K | Aug 1993 – Apr 2026 |
| Pierce, V. I. -E- G-9-55520 | Ozona (Canyon Sand) | Crockett | 1 | 5.02K | 1.31M | Jan 1993 – Apr 2026 |
| Pierce State "a", V.I. G-9-146371 | Ozona (Canyon Sand) | Crockett | 1 | 4.59K | 497K | Jul 1993 – Apr 2026 |
| Childress Ranch G-9-149465 | Ozona (Canyon Sand) | Crockett | 1 | 4.52K | 748K | Apr 1994 – Apr 2026 |
| Pierce-Arrow G-9-146150 | Ozona (Canyon Sand) | Crockett | 1 | 4.46K | 1.36M | Jul 1993 – Apr 2026 |
| Pierce "E", V.I. G-9-144677 | Ozona (Canyon Sand) | Crockett | 1 | 4.18K | 925K | Mar 1993 – Apr 2026 |
| Childress Ranch G-9-149413 | Ozona (Canyon Sand) | Crockett | 1 | 4.17K | 549K | May 1994 – Apr 2026 |
| Childress Ranch G-9-149464 | Ozona (Canyon Sand) | Crockett | 1 | 3.91K | 724K | Apr 1994 – Apr 2026 |
| Pierce "E",v.i. G-9-145697 | Ozona (Canyon Sand) | Crockett | 1 | 3.74K | 265K | May 1993 – Apr 2026 |
| Pierce, V. I. "D" G-9-109613 | Ozona (Canyon Sand) | Crockett | 1 | 3.2K | 247K | Jan 1993 – Apr 2026 |
| Pierce-Arrow G-9-147747 | Ozona (Canyon Sand) | Crockett | 1 | 3.19K | 919K | Dec 1993 – Apr 2026 |
| Childress Ranch G-9-147211 | Ozona (Canyon Sand) | Crockett | 1 | 3.07K | 783K | Oct 1993 – Apr 2026 |
| Pierce, V. I. "A" G-9-144172 | Ozona (Canyon Sand) | Crockett | 1 | 2.8K | 448K | Feb 1993 – Apr 2026 |
| Childress Ranch G-9-147916 | Ozona (Canyon Sand) | Crockett | 1 | 2.71K | 644K | Jan 1994 – Apr 2026 |
| State University EY G-9-149363 | Ingham (Canyon 6400) | Crockett | 1 | 2.46K | 650K | Apr 1994 – Apr 2026 |
| Pierce "a", V.I. G-9-147212 | Ozona (Canyon Sand) | Crockett | 1 | 2.19K | 138K | Nov 1993 – Apr 2026 |
| Pierce-Arrow G-9-146743 | Ozona (Canyon Sand) | Crockett | 1 | 2.14K | 347K | Sep 1993 – Apr 2026 |
| Pierce-Arrow G-9-149480 | Ozona (Canyon Sand) | Crockett | 1 | 1.79K | 291K | May 1994 – Apr 2026 |
| State University "EX" G-9-112653 | Ingham (Canyon 6400) | Crockett | 1 | 1.78K | 439K | Jan 1993 – Apr 2026 |
| Millspaugh G-9-168381 | Ozona (Canyon Sand) | Crockett | 1 | 1.65K | 319K | Dec 1997 – Apr 2026 |
| Childress Ranch G-9-149479 | Ozona (Canyon Sand) | Crockett | 1 | 1.61K | 85.5K | May 1994 – Apr 2026 |
| University 22-31 G-9-98572 | University 31 (Strawn-Detrital) | Crockett | 1 | 1.43K | 1.85M | Jan 1993 – Apr 2026 |
| Millspaugh G-9-167577 | Ozona (Canyon Sand) | Crockett | 1 | 1.37K | 468K | Nov 1997 – Apr 2026 |
| Pierce-Arrow G-9-148792 | Ozona (Canyon Sand) | Crockett | 1 | 1.27K | 333K | Mar 1994 – Apr 2026 |
| Graves "12" G-9-88023 | Ozona (Canyon Sand) | Crockett | 1 | 1.26K | 307K | Jan 1993 – Apr 2026 |
| Pierce "E", V.I. G-9-153425 | Ozona (Canyon Sand) | Crockett | 1 | 1.26K | 529K | Feb 1995 – Apr 2026 |
| Pierce, V. I. "A" G-9-146934 | Ozona (Canyon Sand) | Crockett | 1 | 1.23K | 196K | Oct 1993 – Apr 2026 |
| Childress Ranch G-9-142172 | Ozona (Canyon Sand) | Crockett | 1 | 1.21K | 165K | Jan 1993 – Apr 2026 |
| Pierce, V. I. -E- G-9-54927 | Ozona (Canyon Sand) | Crockett | 1 | 1.16K | 286K | Jan 1993 – Apr 2026 |
| Pierce (NCT-B), V.I. G-9-143780 | Ozona (Canyon Sand) | Crockett | 1 | 1.08K | 66.2K | Oct 1993 – Apr 2026 |
| Pierce, V. I. "E" G-9-142868 | Ozona (Canyon Sand) | Crockett | 1 | 1.07K | 322K | Jan 1993 – Apr 2026 |