CIG MAINLINE STORAGE ANNUAL ATC POSTING
AVERAGE THERMAL CONTENT OF GAS IN STORAGE
FOR 2020 / 2021 SEASON
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Pursuant to Section 1.5(a) of the General Terms and Conditions of its FERC Gas Tariff, Second Revised
Volume No. 1 (Tariff), Colorado Interstate Gas Company, L.L.C.(CIG) is obligated to monitor the
Average Thermal Content (ATC) of the natural gas inventory in its Mainline Storage fields and calculate
the actual ATC of the gas by September 30 of each year.
Based on a review of storage field gas monitoring data, CIG has determined that the ATC in its Mainline
Storage fields has not changed by more than 20 Btu's from the currently effective ATC, and consistent
with CIG's Tariff, an adjustment is not required to support system reliability. Therefore, no revision to
the currently effective ATC of 1,090 Btu per cubic foot and the related storage entitlements is necessary.
Shown below are each Shipper's current MAC, MDIQ, and MDWQ entitlements stated in the individual
contracts at 1,000 Btu per cubic foot, and at the ATC of 1,090 Btu per cubic foot. Please note that CIG currently
has no Rate Schedule FS-1 shippers.
Shipper/Rate Schedule Contract MAC MDIQ MDWQ
-------------------------------- ----------- ------- -------- ----------
Atmos Energy Corporation NNT-1 31044000 435,177 4,280 12,985
@1090 474,343 4,665 14,154
Black Hills Service Company NNT-1 31053000 670 7 20
@1090 730 7 22
Black Hills Service Company. NNT-1 31043001 225,543 2,217 6,730
@1090 245,842 2,418 7,336
Black Hills Service Company NNT-1 31052006 2,936 29 88
@1090 3,200 31 96
Black Hills Service Company NNT-1 31046007 1,958 19 58
@1090 2,134 21 64
Black Hills Service Company NNT-1 215679 575,066 5,655 17,160
@1090 626,822 6,164 18,704
Black Hills Service Company NNT-1 31037000 568,680 5,592 16,969
@1090 619,862 6,096 18,496
Colorado Springs Utilities NNT-1 31051000 2,315,892 22,774 69,105
@1090 2,524,322 24,824 75,325
Colorado Natural Gas Inc. NNT-2 31038000 97,424 958 2,907
@1090 106,192 1,044 3,169
City of Fort Morgan NNT-2 31039000 164,058 1,613 4,895
@1090 178,824 1,759 5,335
Town of Keyes NNT-2 31040000 9,558 94 285
@1090 10,419 102 310
Midwest Energy, Inc. NNT-1 31047000 27,947 275 834
@1090 30,463 300 909
Public Service Co. of Colo. NNT-1 31050000 21,352,477 209,980 637,144
@1090 23,274,200 228,878 694,487
Raton Gas Transmission Co. NNT-1 31048000 210,831 2,073 6,291
@1090 229,806 2,260 6,858
City of Trinidad NNT-2 31041000 164,097 1,614 4,897
@1090 178,866 1,759 5,337
City of Walsenburg NNT-2 31042000 54,686 538 1,632
@1090 59,608 586 1,778
-------------------------------- --------------- ---------- -----------
Total @1000 26,207,000 257,718 782,000
@1090 28,565,633 280,914 852,380
For questions regarding the CIG Annual ATC posting, please contact your Account Director.
Tim Dorpinghaus
Director - Commercial