| Welder #28HHZ42-057-31827 | B&L Resources L.L.C. | CalhounHeyser (5400 #3) | ActiveOil | 5,474 | Apr 1, 2025 | 1 | Jul 2026 |
| Double Down #242-057-31826 | Kebo Oil & Gas Inc. | CalhounLong Mott East (7450) | ActiveOil | 7,500 | Jun 21, 2024 | 1 | Aug 2026 |
| Welder #63HHZ42-057-31815 | B&L Resources L.L.C. | CalhounHeyser (4800 Greta) | ActiveInjection | 5,423 | Oct 13, 2022 | 2 | Jul 2026 |
| Sheriff Greta #242-057-00515 | Initial Energy Services LLC | CalhounSheriff (5700 Greta Sand) | ActiveGas | 5,765 | Sep 12, 2022 | 1 | Dec 2025 |
| Welder #66HHZ42-057-31825 | B&L Resources L.L.C. | CalhounHeyser (5400 #2) | ActiveOil | 5,489 | Jun 3, 2022 | 1 | Jul 2026 |
| Bennett W. H. #1142-057-00016 | McGowan Working Partners Inc. | CalhounHeyser (4800 Greta) | ActiveInjection | 5,512 | Jan 31, 2022 | 3 | — |
| Double Down #142-057-31824 | Kebo Oil & Gas Inc. | CalhounLong Mott East (7450) | ActiveOil | 7,500 | Dec 10, 2021 | 1 | Aug 2026 |
| Welder M #62HHZ42-057-31823 | B&L Resources L.L.C. | CalhounHeyser (5400 #2) | ActiveOil | 5,474 | Nov 29, 2021 | 1 | Jul 2026 |
| Welder #64HHZ42-057-31821 | B&L Resources L.L.C. | CalhounHeyser (5400 #3) | ActiveOil | 5,491 | Sep 25, 2020 | 1 | Jul 2026 |
| Welder C #29HHZ42-057-31820 | B&L Resources L.L.C. | CalhounHeyser (5400 #3) | ActiveOil | 5,481 | Sep 16, 2020 | 1 | Jul 2026 |
| Welder #58D42-057-31810 | B&L Resources L.L.C. | CalhounHeyser (3900) | ActiveInjection | 5,705 | Jun 22, 2018 | 2 | — |
| Welder #60HHZ42-057-31813 | B&L Resources L.L.C. | CalhounHeyser (5400 #3) | ActiveOil | 5,466 | Jun 22, 2018 | 1 | Jul 2026 |
| Traylor Maude B. #4042-057-31745 | Silverbrook Operating LLC | CalhounMaude B. Traylor (Beck Sand) | ActiveOil | 12,025 | Feb 21, 2017 | 2 | Aug 2026 |
| Traylor Maude B. #2642-057-31311 | Silverbrook Operating LLC | CalhounMaude B. Traylor (8300 Sand) | ActiveGas | 12,050 | Jan 25, 2017 | 3 | Aug 2026 |
| Bull Redfish Unit #642-057-31799 | Lamar Oil & Gas Inc. | CalhounPanther Reef (Frio Cons.) | ActiveGas | 10,140 | Jul 9, 2014 | 4 | May 2025 |
| Bull Redfish Unit #542-057-31794 | Lamar Oil & Gas Inc. | CalhounPanther Reef (Frio Cons.) | ActiveGas | 10,173 | May 13, 2014 | 3 | May 2025 |
| MM Brooking #3 #342-057-31790 | CKS Operating LLC | CalhounSouthern Comfort (Frio) | ActiveGas | 9,690 | Nov 8, 2013 | 1 | Jul 2025 |
| Traylor Maude B. #142-057-00298 | Angel Operating LLC | CalhounMaude B. Traylor North (43) | ActiveGas | 11,322 | Jul 30, 2013 | 6 | May 2014 |
| Hahn #342-057-31640 | Kebo Oil & Gas Inc. | CalhounLong Mott East (7100) | ActiveInjection | 7,100 | Jun 20, 2013 | 3 | Aug 2026 |
| State Tract 100 #142-057-31675 | Lamar Oil & Gas Inc. | CalhounMosquito Point N. (Frio F) | ActiveGas | 9,263 | Jan 19, 2012 | 2 | May 2025 |
| Bull Redfish Unit #142-057-31782 | Lamar Oil & Gas Inc. | CalhounPanther Reef (Frio Cons.) | ActiveGas | 10,700 | Jul 13, 2011 | 3 | May 2025 |
| State Tract 77 #142-057-31565 | Silverbrook Operating LLC | CalhounMaude B. Traylor (Freda) | ActiveOil | 8,604 | Jan 26, 2011 | 4 | Aug 2026 |
| Curtis Foester #142-057-31768 | Mueller Exploration Inc. | CalhounMagnolia Beach (Melbourne) | ActiveOil | 9,551 | Feb 2, 2010 | 2 | Aug 2026 |
| Traylor Maude B. #1042-057-30830 | Angel Operating LLC | CalhounMaude B. Traylor North (40) | ActiveGas | 10,000 | Nov 6, 2009 | 4 | Jun 2023 |
| Maude B. Traylor B #942-057-31767 | Angel Operating LLC | CalhounMaude B. Traylor (F-41-61 Deep) | ActiveGas | 12,050 | Feb 11, 2008 | 1 | Jun 2023 |
| Maude Traylor a #642-057-31763 | Remora Operating LLC | CalhounMaude B. Traylor (F-41-61 Deep) | ActiveGas | 11,130 | Dec 15, 2007 | 2 | Apr 2021 |
| State Tract 59 #242-057-31734 | Remora Operating LLC | CalhounMaude B. Traylor (F-41-61 Deep) | ActiveGas | 11,301 | Jan 12, 2007 | 2 | Oct 2014 |
| Traylor Maude a #242-057-31728 | Remora Operating LLC | CalhounMaude B. Traylor (F-41-61 Deep) | ActiveGas | 12,079 | Dec 4, 2006 | 1 | Nov 2014 |
| Traylor Maude a #142-057-31725 | Remora Operating LLC | CalhounMaude B. Traylor (F-41-61 Deep) | ActiveGas | 11,499 | Nov 7, 2006 | 1 | Jul 2021 |
| Wynne #142-057-31678 | Matagorda Resources Co. Inc. | CalhounMesquite Bay (Frio I) | ActiveGas | 11,051 | Jun 6, 2006 | 2 | Jul 2008 |
| P.W.L.R. #1042-057-31720 | Royal Production Company Inc. | CalhounGuajolote Suerte (5750) | ActiveInjection | 4,600 | Mar 24, 2006 | 1 | Aug 2026 |
| Boyd Frank #142-057-00513 | Initial Energy Services LLC | CalhounSheriff (F-4) | ActiveGas | 5,765 | Apr 14, 2005 | 2 | Sep 2005 |
| State Tract D #142-057-31679 | H T P Producing Company | CalhounWildcat | ActiveGas | 6,681 | Jun 24, 2004 | 1 | — |
| Hahn #242-057-31635 | Kebo Oil & Gas Inc. | CalhounLong Mott East (7450) | ActiveOil | 7,510 | Oct 10, 2002 | 2 | Aug 2026 |
| P.W.L.R. #242-057-31633 | Royal Production Company Inc. | CalhounGuajolote Suerte (5750) | ActiveOil | 5,907 | Sep 5, 2002 | 1 | Aug 2026 |
| BP Chemicals #142-057-31622 | Royal Production Company Inc. | CalhounGuajolote Suerte (5750) | ActiveOil | 6,040 | Mar 5, 2002 | 1 | Aug 2026 |
| P.W.L.R. #142-057-31621 | Royal Production Company Inc. | CalhounGuajolote Suerte (5750) | ActiveOil | 6,900 | Feb 6, 2002 | 1 | Aug 2026 |
| State Tract 45 #142-057-01177 | Gulf E&P Ltd | CalhounZoller East (Frio -F-) | ActiveGas | 11,065 | Jul 19, 2001 | 1 | Aug 2016 |
| State Tract 216 #2-L42-057-30293 | Torrent Oil LLC | CalhounGrass Island (4870) | ActiveOil | 6,500 | Jan 24, 2000 | 3 | Aug 2026 |
| Mueller A. W. Heirs #1-C42-057-31503 | Texas Independent Explor Ltd. | CalhounGreen Lake West (8850) | ActiveGas | 9,600 | Sep 23, 1999 | 2 | Mar 2026 |
| Welder a #5342-057-31567 | B&L Resources L.L.C. | CalhounHeyser (5400 #1) | ActiveGas | 8,600 | Mar 30, 1999 | 4 | Dec 2012 |
| State Tract 216 #1842-057-31586 | Torrent Oil LLC | CalhounGrass Island (Farwell -M-) | ActiveOil | 5,475 | May 1, 1998 | 4 | Aug 2026 |
| Traylor Maude B. #3642-057-31561 | Silverbrook Operating LLC | CalhounMaude B. Traylor (F-41-61 Deep) | ActiveGas | 12,900 | Jun 20, 1997 | 1 | Aug 2026 |
| Traylor Maude B. #3142-057-31548 | Silverbrook Operating LLC | CalhounMaude B. Traylor E. (Melbourne) | ActiveOil | 8,728 | Sep 11, 1996 | 2 | Aug 2026 |
| State Tract 216 #142-057-30270 | Torrent Oil LLC | CalhounGrass Island (Matagorda -A-) | ActiveOil | 6,000 | May 21, 1996 | 4 | Aug 2026 |
| Bennett W. H. #1742-057-00025 | McGowan Working Partners Inc. | CalhounHeyser | ActiveInjection | 5,605 | Feb 8, 1996 | 3 | Aug 2026 |
| Key J. T. #242-057-00497 | Amrwr LLC | CalhounSheriff (F-3) | ActiveGas | 5,782 | Nov 22, 1994 | 1 | Feb 2002 |
| Frerichs F. L. #242-057-31504 | Texas Independent Explor Ltd. | CalhounSheriff West (Frio 9000) | ActiveGas | 9,415 | Mar 28, 1991 | 1 | Aug 2026 |
| Marshall H. T. #342-057-00058 | McGowan Working Partners Inc. | CalhounHeyser (4400) | ActiveGas | 5,487 | Nov 13, 1990 | 4 | Jan 2026 |
| Sells Katherine Maude #442-057-00630 | Amrwr LLC | CalhounAppling N. (8000) | ActiveGas | 8,725 | Jul 20, 1990 | 1 | Apr 2004 |