| 603930 | Jul 28, 2005 | Jul 28, 2005 | Heartland Resources, Inc. | Kimble | Kennedy #1 | 2,000 | 26730419 |
| 601275 | May 27, 2005 | May 27, 2005 | Heartland Resources, Inc. | Kimble | Kennedy #1 | 2,138 | 26700053 |
| 601273 | May 27, 2005 | May 27, 2005 | Heartland Resources, Inc. | Kimble | Kennedy #2 | 2,066 | 26730020 |
| 544663 | Apr 27, 2004 | Apr 27, 2004 | Heartland Resources, Inc. | Falls | Golden Unit #2 | 3,440 | 14530645 |
| 538475 | Nov 12, 2003 | Nov 12, 2003 | Heartland Resources, Inc. | Milam | Underwood #11 | 1,995 | 33133559 |
| 512749 | Nov 19, 2001 | Nov 19, 2001 | Heartland Resources, Inc. | Falls | Elona Alford Unit #2 | 600 | 14530777 |
| 509099 | May 24, 2001 | May 24, 2001 | Heartland Resources, Inc. | Milam | Perry, P. H. "W" #1 | 2,700 | 33133531 |
| 498027 | Aug 14, 2000 | Aug 14, 2000 | Heartland Resources, Inc. | Milam | Tru Unit #6 | 2,000 | 33133524 |
| 479351 | Sep 15, 1998 | Sep 15, 1998 | Heartland Resources, Inc. | Lee | Hri - Weise A #2 | 3,160 | 28732154 |
| 479175 | Sep 3, 1998 | Sep 3, 1998 | Heartland Resources, Inc. | Williamson | Stiles Ranch, Inc. #1 | 1,500 | 49130418 |
| 472055 | Jan 12, 1998 | Jan 12, 1998 | Heartland Resources, Inc. | Lee | Chapple-Rosenbaum Unit #2 | 3,300 | 28732496 |
| 472055Amendment | Jan 12, 1998 | Jan 12, 1998 | Heartland Resources, Inc. | Lee | Chapple-Rosenbaum Unit #2 | 3,254 | 28732496 |
| 471135 | Dec 15, 1997 | Dec 15, 1997 | Heartland Resources, Inc. | Atascosa | Wherry & Green Unit #1 | 1,900 | 01334110 |
| 457376 | Jan 21, 1997 | Jan 21, 1997 | Heartland Resources, Inc. | Milam | Underwood #12 | 2,000 | 33133473 |
| 457375 | Jan 17, 1997 | Jan 17, 1997 | Heartland Resources, Inc. | Milam | Underwood #10 | 2,000 | 33133474 |
| 452691 | Sep 24, 1996 | Sep 24, 1996 | Heartland Resources, Inc. | Lee | Chapple-Rosenbaum Unit #1 | 3,250 | 28732483 |
| 450150 | Jul 9, 1996 | Jul 9, 1996 | Heartland Resources, Inc. | Lee | Chapple-Rosenbaum #3 | 3,300 | 28730767 |
| 450150Amendment | Jul 9, 1996 | Jul 9, 1996 | Heartland Resources, Inc. | Lee | Chapple-Rosenbaum #3 | 3,300 | 28730767 |
| 445200 | Mar 1, 1996 | Mar 1, 1996 | Heartland Resources, Inc. | Washington | Cockrell - Janner #1 | 1,900 | 47730814 |
| 438729 | Aug 17, 1995 | Aug 17, 1995 | Heartland Resources, Inc. | Lee | Hri - Weise A #1 | 3,300 | 28732472 |
| 428196 | Feb 10, 1995 | Feb 10, 1995 | Heartland Resources, Inc. | Milam | Tru Unit #5 | 1,990 | 33133449 |
| 424067 | Aug 23, 1994 | Aug 23, 1994 | Heartland Resources, Inc. | Milam | Yakesch #1 | 2,500 | 33133444 |
| 414731 | Aug 12, 1993 | Aug 12, 1993 | Heartland Resources, Inc. | Milam | Roberts, J. Bob #2 | 2,500 | 33133438 |
| 409890 | Mar 23, 1993 | Mar 23, 1993 | Heartland Resources, Inc. | Milam | Tru Unit #4 | 1,990 | 33133430 |
| 409847 | Mar 23, 1993 | Mar 23, 1993 | Heartland Resources, Inc. | Milam | Darby Fee #2 | 2,500 | 33133429 |
| 405690 | Nov 4, 1992 | Nov 4, 1992 | Heartland Resources, Inc. | Milam | Coffield - J&J #1 | 2,900 | 33133410 |
| 400689 | Jul 15, 1992 | Jul 15, 1992 | Heartland Resources, Inc. | Milam | Caligula-Coffield #1 | 3,048 | 33131149 |
| 399456 | May 29, 1992 | May 29, 1992 | Heartland Resources, Inc. | Burleson | RJC #1 | 2,850 | 05133323 |
| 399457 | May 27, 1992 | May 27, 1992 | Heartland Resources, Inc. | Milam | Tru Unit #3 | 1,920 | 33133353 |
| 392284 | Oct 3, 1991 | Oct 3, 1991 | Heartland Resources, Inc. | Milam | Darby Fee #1 | 1,950 | 33133276 |
| 386061 | Apr 2, 1991 | Apr 2, 1991 | Heartland Resources, Inc. | Milam | Tru Unit #2 | 1,950 | 33133326 |
| 385832 | Apr 1, 1991 | Apr 1, 1991 | Heartland Resources, Inc. | Milam | Coffield-Martin #1 | 3,800 | 33131197 |
| 371111 | Mar 22, 1990 | Mar 22, 1990 | Heartland Resources, Inc. | Milam | Darby Fee #1 | 2,500 | 33133276 |
| 368530 | Jan 16, 1990 | Jan 16, 1990 | Heartland Resources, Inc. | Bell | Wilde-Jecmenek Unit #1 | 1,500 | 02730134 |
| 359816 | Jun 1, 1989 | Jun 1, 1989 | Heartland Resources, Inc. | Milam | Coffield - Lockhart #1 | 2,500 | 33133246 |
| 355073 | Jan 12, 1989 | Jan 12, 1989 | Heartland Resources, Inc. | Milam | Schneebeli, Jake #2 | 2,300 | 33133239 |
| 350860 | Sep 8, 1988 | Sep 8, 1988 | Heartland Resources, Inc. | Milam | Darby, Lee Roy #2 | 2,500 | 33133229 |
| 347759 | Jun 14, 1988 | Jun 14, 1988 | Heartland Resources, Inc. | Milam | T.R.U. Unit #1 | 1,975 | 33133212 |
| 345499 | Apr 25, 1988 | Apr 25, 1988 | Heartland Resources, Inc. | Milam | Kennedy, H. H. & M. W. #1 | 2,500 | 33133204 |
| 339452 | Dec 2, 1987 | Dec 2, 1987 | Heartland Resources, Inc. | Milam | Schneebeli, Earl #3 | 3,100 | 33133181 |
| 339241 | Nov 24, 1987 | Nov 24, 1987 | Heartland Resources, Inc. | Milam | Coffield, Caligula #1 | 3,040 | 33131149 |
| 335104 | Sep 3, 1987 | Sep 3, 1987 | Heartland Resources, Inc. | Milam | Lumpkins, Glen B. #2 | 3,100 | 33133168 |
| 334552 | Aug 18, 1987 | Aug 18, 1987 | Heartland Resources, Inc. | Milam | Mehaffey, L. C. (S) #1 | 4,500 | 33133164 |
| 334552Amendment | Aug 18, 1987 | Aug 18, 1987 | Heartland Resources, Inc. | Milam | Mehaffey, L. C. "S" #1 | 4,500 | 33133164 |
| 329918 | May 11, 1987 | May 11, 1987 | Heartland Resources, Inc. | Milam | Mehaffey #1 | 2,500 | 33132706 |
| 327882 | Mar 17, 1987 | Mar 17, 1987 | Heartland Resources, Inc. | Milam | Underwood #3 | 3,000 | 33133126 |
| 327299 | Mar 3, 1987 | Mar 3, 1987 | Heartland Resources, Inc. | Milam | Roberts, J. Bob #1 | 2,400 | 33132985 |
| 327298 | Mar 3, 1987 | Mar 3, 1987 | Heartland Resources, Inc. | Milam | Johnson, Virginia #1 | 2,550 | 33133123 |
| 327133 | Feb 26, 1987 | Feb 26, 1987 | Heartland Resources, Inc. | Milam | Gilliam #2 | 3,100 | 33133121 |
| 324516 | Jan 9, 1987 | Jan 9, 1987 | Heartland Resources, Inc. | Milam | Mehaffey, L. C. -A- #1 | 4,700 | 33133079 |
| 323136 | Nov 25, 1986 | Nov 25, 1986 | Heartland Resources, Inc. | Milam | Darby, Lee Roy #1B | 2,500 | 33132462 |
| 321396 | Oct 10, 1986 | Oct 10, 1986 | Heartland Resources, Inc. | Milam | Underwood #2 | 3,000 | 33133068 |
| 320348 | Sep 15, 1986 | Sep 15, 1986 | Heartland Resources, Inc. | Milam | Schneebeli, Earl #2 | 3,100 | 33133065 |
| 303308 | Jun 17, 1986 | Jun 17, 1986 | Heartland Resources, Inc. | Milam | Underwood #1 | 3,000 | 33131465 |
| 301906 | May 7, 1986 | May 7, 1986 | Heartland Resources, Inc. | Milam | Gilliam #1 | 3,100 | 33133051 |
| 299599 | Mar 14, 1986 | Mar 14, 1986 | Heartland Resources, Inc. | Milam | Johnson, Sammie Lee #2 | 3,200 | 33133040 |
| 298046 | Feb 19, 1986 | Feb 19, 1986 | Heartland Resources, Inc. | Milam | Schneebeli, Earl #1 | 3,200 | 33133037 |
| 296292 | Jan 28, 1986 | Jan 28, 1986 | Heartland Resources, Inc. | Milam | Darby, Lee Roy #1C | 2,500 | 33132462 |
| 292020 | Dec 9, 1985 | Dec 9, 1985 | Heartland Resources, Inc. | Burleson | Crump, Emory Jr. #1 | 3,500 | 05132912 |
| 288597 | Oct 28, 1985 | Oct 28, 1985 | Heartland Resources, Inc. | Milam | Roberts, J. Bob #1 | 3,400 | 33132985 |
| 284442 | Sep 9, 1985 | Sep 9, 1985 | Heartland Resources, Inc. | Milam | Schneebeli, Jake #1 | 3,200 | 33132954 |
| 264590 | Jan 21, 1985 | Jan 21, 1985 | Heartland Resources, Inc. | Milam | Beard #1 | 2,600 | 33132769 |
| 264594 | Jan 21, 1985 | Jan 21, 1985 | Heartland Resources, Inc. | Milam | Lumpkins, Glen #1 | 3,250 | 33132770 |
| 253904 | Oct 10, 1984 | Oct 10, 1984 | Heartland Resources, Inc. | Milam | Johnson, Sammie Lee #1 | 2,950 | 33132689 |
| 249865 | Sep 10, 1984 | Sep 10, 1984 | Heartland Resources, Inc. | Milam | Schneebeli Estate #1 | 2,500 | 33132663 |
| 231091 | Mar 2, 1984 | Mar 2, 1984 | Heartland Resources, Inc. | Milam | Colbert, Jack #1 | 3,250 | 33132531 |
| 223039 | Dec 9, 1983 | Dec 9, 1983 | Heartland Resources, Inc. | Milam | Darby, Lee Roy #1 | 3,100 | 33132462 |
| 211900 | Sep 13, 1983 | Sep 13, 1983 | Heartland Resources, Inc. | Brown | Houching #1 | 1,700 | 04933752 |
| 200702 | Jul 7, 1983 | Jul 7, 1983 | Heartland Resources, Inc. | Stephens | Cook Heirs - Heartland "B" #3 | 1,700 | 42933725 |
| 192347 | Apr 25, 1983 | Apr 25, 1983 | Heartland Resources, Inc. | Stephens | Cook Heirs - Heartland "A" #2 | 1,950 | 42933644 |
| 188848 | Mar 17, 1983 | Mar 17, 1983 | Heartland Resources, Inc. | Stephens | Brown #4 | 1,950 | 42933615 |
| 178406 | Nov 29, 1982 | Nov 29, 1982 | Heartland Resources, Inc. | Stephens | Cook Heirs #1 | 1,800 | 42933522 |