| Brown-Donner Unit A-567 G-6-153267 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 370K | 2.15M | Dec 1994 – Aug 1998 |
| Citori Unit O-3-23062 | Union Pacific Resources Company | Giddings (Buda) | Milam | 1 | 283K | 126K | Jul 1996 – Mar 1999 |
| Arco Fee Unit A-121 G-6-151133 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 254K | 2.6M | May 1994 – Mar 2000 |
| Mahlmann-Walther Unit G-3-141715 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Fayette | 1 | 252K | 2.3M | Jan 1993 – Aug 1999 |
| Pocahontas Unit G-3-161527 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Fayette | 1 | 245K | 929K | Nov 1996 – Aug 1999 |
| Terry, H. L. Unit G-3-146621 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Brazos | 1 | 215K | 2.05M | Jul 1993 – Aug 1999 |
| Allen G-3-145818 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Brazos | 1 | 188K | 1.3M | May 1993 – Aug 1999 |
| Franus Unit G-3-156437 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Grimes | 1 | 187K | 2.41M | Sep 1995 – Feb 2000 |
| McCullough-McCullough 'A' G-3-145083 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Brazos | 1 | 187K | 1.49M | Jan 1993 – Feb 2000 |
| Cannon Unit G-3-155696 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Grimes | 1 | 179K | 1.28M | Jun 1995 – Aug 1999 |
| Jawbreaker Unit G-3-151736 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Fayette | 1 | 174K | 1.3M | Sep 1994 – Aug 1999 |
| Champion Int'l Unit A-1175 G-6-155820 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 159K | 833K | Jul 1995 – Jan 1999 |
| Mueller-Korth Unit G-3-148108 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Lee | 1 | 155K | 751K | Jan 1994 – Aug 1999 |
| Jawbreaker Unit O-3-22384 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Fayette | 1 | 151K | 610K | Apr 1994 – Sep 1994 |
| Champion a-334 Unit G-6-152455 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 143K | 1.21M | Jul 1994 – Dec 1998 |
| Brazos Coal Ltd.-Terry "B" Unit G-3-146180 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Brazos | 1 | 134K | 915K | Jun 1993 – Aug 1999 |
| Wagnon Unit G-3-153709 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Grimes | 1 | 127K | 966K | Feb 1995 – Aug 1999 |
| Cartwright-Moore Unit O-3-23512 | Union Pacific Resources Company | Giddings (Buda) | Milam | 1 | 115K | 50.4K | Jun 1997 – Dec 1998 |
| Gibbs Bros. Unit G-6-149857 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 88.2K | 472K | May 1994 – Jan 1999 |
| Maggie Unit O-3-23596 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Bastrop | 1 | 88.1K | 39.6K | Feb 1998 – Feb 1999 |
| Arco-Fee a-990 Unit G-6-153675 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 77.7K | 1.04M | Dec 1994 – Aug 1998 |
| Grant O-3-23533 | Union Pacific Resources Company | Giddings (Buda) | Brazos | 1 | 77K | 90.7K | Sep 1997 – Sep 1998 |
| Dietz-OL Unit O-3-22105 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Washington | 1 | 74.2K | 600K | Jul 1993 – Oct 1993 |
| Teinert-Kunze Unit O-3-21604 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Fayette | 1 | 67.6K | 285K | Jan 1993 – Feb 1998 |
| Hoelscher, Alice B. G-3-143662 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Burleson | 1 | 67.3K | 723K | Jan 1993 – May 1996 |
| Tatsch O-1-13721 | Union Pacific Resources Company | Pearsall (Austin Chalk) | Frio | 1 | 65.6K | 65.2K | Mar 1993 – Dec 1998 |
| Bscu USA 27316 G-6-156998 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Sabine | 1 | 65K | 709K | Mar 1995 – Dec 1998 |
| Blacktail Unit O-3-23474 | Union Pacific Resources Company | Giddings (Buda) | Robertson | 1 | 64.2K | 33.2K | Feb 1998 – Jul 1998 |
| Arco-Vastar Unit A-1008 O-6-12958 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 62K | 287K | Jan 1993 – Sep 1995 |
| Roosevelt Unit G-3-151956 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Fayette | 1 | 61.5K | 671K | May 1994 – Sep 1999 |
| Embesi Unit G-3-174197 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Fayette | 1 | 59.9K | 502K | Jun 1999 – Oct 1999 |
| The Pines, Inc.-Karisch Unit O-3-21223 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Fayette | 1 | 57.9K | 412K | Jan 1993 – Jan 1998 |
| Bukowski-Bienski Unit O-3-21384 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Brazos | 1 | 57.5K | 262K | Jan 1993 – Jun 2000 |
| Scott-Ruesink Unit O-3-21182 | Union Pacific Resources Company | Kurten (Buda) | Brazos | 1 | 56.6K | 57.7K | Jan 1993 – Aug 1997 |
| Hobbs Unit O-6-13489 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 53.5K | 366K | Nov 1995 – Jan 1997 |
| Oliver F. Goen Unit O-3-21675 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Brazos | 1 | 53.3K | 359K | Jan 1993 – Jul 1998 |
| Wardner O-4-11428 | Union Pacific Resources Company | Stratton (F-39-11) | Nueces | 4 | 51K | 255K | Jan 1993 – Oct 1996 |
| Dees-OL Unit O-3-22265 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Lee | 1 | 48.8K | 57.3K | Jul 1993 – Oct 1998 |
| Burton-Wells Unit O-3-23513 | Union Pacific Resources Company | Giddings (Buda) | Milam | 1 | 47.3K | 21.2K | Feb 1998 – Dec 1998 |
| Sadberry-Foyt Unit O-3-23508 | Union Pacific Resources Company | Giddings (Buda) | Robertson | 1 | 43.5K | 24.2K | Feb 1998 – Dec 1998 |
| Horned Frog O-3-20900 | Union Pacific Resources Company | Kurten (Buda) | Brazos | 2 | 43.5K | 95.9K | Jan 1993 – Apr 1996 |
| Arco-Vastar Unit A-172A O-6-13211 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 43K | 218K | Aug 1993 – Feb 1995 |
| Woodyard-Cargill Unit O-3-22284 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Brazos | 1 | 43K | 104K | Oct 1993 – Dec 1995 |
| Jones-Jones Unit O-3-21524 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Brazos | 1 | 42.4K | 259K | Jan 1993 – Feb 1998 |
| Arco Fee A-249 O-6-13377 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 41.1K | 560K | Sep 1994 – Sep 1996 |
| Weedon-Weedon "B" Unit O-3-21918 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Brazos | 1 | 40.2K | 160K | Jan 1993 – Dec 1996 |
| McCrary Unit G-3-156476 | Union Pacific Resources Company | Giddings (Austin Chalk, Gas) | Grimes | 1 | 39.1K | 356K | Oct 1995 – Aug 1999 |
| Arco-Vastar Unit A-172 O-6-13031 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Newton | 1 | 38.7K | 262K | Jan 1993 – Jun 1997 |
| Samelson-Dunze Unit O-3-21687 | Union Pacific Resources Company | Giddings (Austin Chalk-3) | Fayette | 1 | 38K | 50.8K | Jan 1993 – Jan 1998 |
| Temple Industries O-6-13088 | Union Pacific Resources Company | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 37.9K | 149K | Jan 1993 – Apr 1995 |