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Yearly and monthly production

Markham, Chester L. 18-1 Lease
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Lease: Markham, Chester L. 18-1
Operator: River Rock Operating, LLC
Location: T28S, R16E, Sec. 18
Cumulative Production: 131977 mcf (from 2007 to 2024)
KS Dept. of Revenue Lease Code: 228899
KS Dept. of Revenue Lease Name: MARKHAM,C. 18-1
View T1 PDF (from KCC)
View T1 PDF (from KCC)
Field: Cherokee Basin Coal Area
County: Wilson
Producing Zone:
Well Data (may be an incomplete list):
T28S R16E, Sec. 18, NW NE
Lease: CHESTER L. MARKHAM 1-18
Operator: Quest Cherokee, LLC
Current Operator: PostRock Midcontinent Production LLC
API Number: 15-205-26789
T28S R16E, Sec. 18, NW NE
Lease: CHESTER L. MARKHAM 1-18
Operator: PostRock Midcontinent Production LLC
Current Operator: River Rock Operating, LLC
API Number: 15-205-26789-0001

Data are received monthly from the Kansas Department of Revenue.



Annual Gas Production, (mcf)

Year Production Wells
Production Plots

2007 423 1
2008 4 1
2009 - -
2010 8,545 1
2011 15,719 1
2012 11,379 1
2013 8,507 1
2014 6,480 1
2015 9,866 1
2016 10,117 1
2017 11,834 1
2018 11,756 1
2019 8,667 1
2020 7,654 1
2021 7,185 1
2022 6,273 1
2023 4,935 1
2024 2,633 1
Reported through 7-2024.
Note: bbls is barrels; mcf is 1000 cubic feet.
  Recent Monthly Gas Production, (mcf)
(Complete production available in file saved
using blue button at top of page.)
Year Month Production Wells Reporter or Purchaser/
Reporting Customer
2014 1 505 1 PostRock Midcontinent Production LLC (100%)
2014 2 491 1 PostRock Midcontinent Production LLC (100%)
2014 3 459 1 PostRock Midcontinent Production LLC (100%)
2014 4 506 1 PostRock Midcontinent Production LLC (100%)
2014 5 597 1 PostRock Midcontinent Production LLC (100%)
2014 6 566 1 PostRock Midcontinent Production LLC (100%)
2014 7 580 1 PostRock Midcontinent Production LLC (100%)
2014 8 575 1 PostRock Midcontinent Production LLC (100%)
2014 9 540 1 PostRock Midcontinent Production LLC (100%)
2014 10 581 1 PostRock Midcontinent Production LLC (100%)
2014 11 535 1 PostRock Midcontinent Production LLC (100%)
2014 12 545 1 PostRock Midcontinent Production LLC (100%)
2015 1 551 1 PostRock Midcontinent Production LLC (100%)
2015 2 500 1 PostRock Midcontinent Production LLC (100%)
2015 3 515 1 PostRock Midcontinent Production LLC (100%)
2015 4 441 1 PostRock Midcontinent Production LLC (100%)
2015 5 679 1 PostRock Midcontinent Production LLC (100%)
2015 6 1035 1 PostRock Midcontinent Production LLC (100%)
2015 7 962 1 PostRock Midcontinent Production LLC (100%)
2015 8 1036 1 PostRock Midcontinent Production LLC (100%)
2015 9 1033 1 PostRock Midcontinent Production LLC (100%)
2015 10 1055 1 PostRock Midcontinent Production LLC (100%)
2015 11 1101 1 PostRock Midcontinent Production LLC (100%)
2015 12 958 1 PostRock Midcontinent Production LLC (100%)
2016 1 1031 1 PostRock Midcontinent Production LLC (100%)
2016 2 961 1 PostRock Midcontinent Production LLC (100%)
2016 3 1068 1 PostRock Midcontinent Production LLC (100%)
2016 4 1055 1 PostRock Midcontinent Production LLC (100%)
2016 5 1059 1 PostRock Midcontinent Production LLC (100%)
2016 6 888 1 RIVER ROCK ENERGY LLC (100%)
2016 7 648 1 RIVER ROCK ENERGY LLC (100%)
2016 8 516 1 RIVER ROCK ENERGY LLC (100%)
2016 9 469 1 RIVER ROCK ENERGY LLC (100%)
2016 10 570 1 RIVER ROCK ENERGY LLC (100%)
2016 11 1017 1 RIVER ROCK ENERGY LLC (100%)
2016 12 835 1 RIVER ROCK ENERGY LLC (100%)
2017 1 466 1 RIVER ROCK ENERGY LLC (100%)
2017 2 407 1 RIVER ROCK ENERGY LLC (100%)
2017 3 618 1 RIVER ROCK ENERGY LLC (100%)
2017 4 1187 1 RIVER ROCK ENERGY LLC (100%)
2017 5 1139 1 RIVER ROCK ENERGY LLC (100%)
2017 6 1047 1 RIVER ROCK ENERGY LLC (100%)
2017 7 1203 1 RIVER ROCK ENERGY LLC (100%)
2017 8 1191 1 RIVER ROCK ENERGY LLC (100%)
2017 9 1160 1 RIVER ROCK ENERGY LLC (100%)
2017 10 1137 1 RIVER ROCK ENERGY LLC (100%)
2017 11 1172 1 RIVER ROCK ENERGY LLC (100%)
2017 12 1107 1 RIVER ROCK ENERGY LLC (100%)
2018 1 1124 1 RIVER ROCK ENERGY LLC (100%)
2018 2 1011 1 RIVER ROCK ENERGY LLC (100%)
2018 3 1142 1 RIVER ROCK ENERGY LLC (100%)
2018 4 1021 1 RIVER ROCK ENERGY LLC (100%)
2018 5 1009 1 RIVER ROCK ENERGY LLC (100%)
2018 6 944 1 RIVER ROCK ENERGY LLC (100%)
2018 7 984 1 RIVER ROCK ENERGY LLC (100%)
2018 8 982 1 RIVER ROCK ENERGY LLC (100%)
2018 9 927 1 RIVER ROCK ENERGY LLC (100%)
2018 10 931 1 RIVER ROCK ENERGY LLC (100%)
2018 11 853 1 RIVER ROCK ENERGY LLC (100%)
2018 12 828 1 RIVER ROCK ENERGY LLC (100%)
2019 1 804 1 RIVER ROCK ENERGY LLC (100%)
2019 2 704 1 RIVER ROCK ENERGY LLC (100%)
2019 3 777 1 RIVER ROCK ENERGY LLC (100%)
2019 4 762 1 RIVER ROCK ENERGY LLC (100%)
2019 5 769 1 RIVER ROCK ENERGY LLC (100%)
2019 6 696 1 RIVER ROCK ENERGY LLC (100%)
2019 7 729 1 RIVER ROCK ENERGY LLC (100%)
2019 8 735 1 RIVER ROCK ENERGY LLC (100%)
2019 9 712 1 RIVER ROCK ENERGY LLC (100%)
2019 10 728 1 RIVER ROCK ENERGY LLC (100%)
2019 11 693 1 RIVER ROCK ENERGY LLC (100%)
2019 12 558 1 RIVER ROCK ENERGY LLC (100%)
2020 1 455 1 RIVER ROCK ENERGY LLC (100%)
2020 2 674 1 RIVER ROCK ENERGY LLC (100%)
2020 3 738 1 RIVER ROCK ENERGY LLC (100%)
2020 4 700 1 RIVER ROCK ENERGY LLC (100%)
2020 5 712 1 RIVER ROCK ENERGY LLC (100%)
2020 6 702 1 RIVER ROCK ENERGY LLC (100%)
2020 7 703 1 RIVER ROCK ENERGY LLC (100%)
2020 8 694 1 RIVER ROCK ENERGY LLC (100%)
2020 9 672 1 RIVER ROCK ENERGY LLC (100%)
2020 10 509 1 RIVER ROCK ENERGY LLC (100%)
2020 11 411 1 RIVER ROCK ENERGY LLC (100%)
2020 12 684 1 RIVER ROCK ENERGY LLC (100%)
2021 1 680 1 RIVER ROCK ENERGY LLC (100%)
2021 2 451 1 RIVER ROCK ENERGY LLC (100%)
2021 3 642 1 RIVER ROCK ENERGY LLC (100%)
2021 4 617 1 RIVER ROCK ENERGY LLC (100%)
2021 5 631 1 RIVER ROCK ENERGY LLC (100%)
2021 6 604 1 RIVER ROCK ENERGY LLC (100%)
2021 7 610 1 RIVER ROCK ENERGY LLC (100%)
2021 8 596 1 RIVER ROCK ENERGY LLC (100%)
2021 9 583 1 RIVER ROCK ENERGY LLC (100%)
2021 10 599 1 RIVER ROCK ENERGY LLC (100%)
2021 11 559 1 RIVER ROCK ENERGY LLC (100%)
2021 12 613 1 RIVER ROCK ENERGY LLC (100%)
2022 1 570 1 RIVER ROCK ENERGY LLC (100%)
2022 2 466 1 RIVER ROCK ENERGY LLC (100%)
2022 3 562 1 RIVER ROCK ENERGY LLC (100%)
2022 4 548 1 RIVER ROCK ENERGY LLC (100%)
2022 5 560 1 RIVER ROCK ENERGY LLC (100%)
2022 6 509 1 RIVER ROCK ENERGY LLC (100%)
2022 7 457 1 RIVER ROCK ENERGY LLC (100%)
2022 8 561 1 RIVER ROCK ENERGY LLC (100%)
2022 9 528 1 RIVER ROCK ENERGY LLC (100%)
2022 10 532 1 RIVER ROCK ENERGY LLC (100%)
2022 11 482 1 RIVER ROCK ENERGY LLC (100%)
2022 12 498 1 RIVER ROCK ENERGY LLC (100%)
2023 1 493 1 RIVER ROCK ENERGY LLC (100%)
2023 2 436 1 RIVER ROCK ENERGY LLC (100%)
2023 3 431 1 RIVER ROCK ENERGY LLC (100%)
2023 4 411 1 RIVER ROCK ENERGY LLC (100%)
2023 5 398 1 RIVER ROCK ENERGY LLC (100%)
2023 6 461 1 RIVER ROCK ENERGY LLC (100%)
2023 7 497 1 RIVER ROCK ENERGY LLC (100%)
2023 8 481 1 RIVER ROCK ENERGY LLC (100%)
2023 9 460 1 RIVER ROCK ENERGY LLC (100%)
2023 10 447 1 RIVER ROCK ENERGY LLC (100%)
2023 11 234 1 RIVER ROCK ENERGY LLC (100%)
2023 12 186 1 RIVER ROCK ENERGY LLC (100%)
2024 1 373 1 RIVER ROCK ENERGY LLC (100%)
2024 2 456 1 RIVER ROCK ENERGY LLC (100%)
2024 3 455 1 RIVER ROCK ENERGY LLC (100%)
2024 4 436 1 RIVER ROCK ENERGY LLC (100%)
2024 5 163 1 RIVER ROCK ENERGY LLC (100%)
2024 6 172 1 RIVER ROCK ENERGY LLC (100%)
2024 7 578 1 RIVER ROCK ENERGY LLC (100%)



Pre-1987 cumulative data and monthly volume data is provided under license agreement to the KGS by IHS Energy. As such, it may be reviewed and used for public service and research purposes. It may not be downloaded or used for purposes of re-packaging, reselling or dissemination to third parties.

Kansas Geological Survey
Comments to webadmin@kgs.ku.edu
URL=http://www.kgs.ku.edu/Magellan/Field/lease.html
Programs Updated May 27, 2014
Data from Kansas Dept. of Revenue files monthly.