Colorado Interstate Gas Company, L.L.C.

September 3, 2026

Gas Quality Impacts  

Colorado Interstate Gas Company, L.L.C. (CIG) previously posted (see Notices #123165 and 123195) that it was notified by Wyoming Interstate Company, L.L.C. (WIC) that CIG's delivery interconnects at (FLY) Flying Hawk PIN #800245 and  (BOW) Bowie PIN #800104 are providing gas exceeding WIC's Tariff maximum specification for carbon dioxide (CO₂) of 2% by volume.  Additionally, WIC has determined performance caps may be required at FLY and has provided notice to CIG that if the CO₂ content at this location is not brought within 2% by the Timely Cycle for gas day September 9, 2026, WIC will begin placing performance caps to reduce volumes at FLY. 

While the CIG tariff specification for CO₂ is higher than WIC's, Section 3.1 of the General Terms and Conditions (GT&C) of the Second Revised Volume No. 1 of CIG's FERC Gas Tariff (Tariff) provides, among other things, that CIG may decline to receive Gas at any Point of Receipt if the quality of the Gas is inferior to that “required by Shipper or a third Party at any Point of Delivery under the Agreement," notwithstanding Sections 3.1 through 3.3 of the GT&C of the Tariff.   

CIG has identified the following CIG High Plains locations as the suppliers of gas with the highest CO₂ content that physically flows to WIC via the FLY interconnect.  If the CO₂ content at these locations is not reduced to a level that is sufficient for CIG to meet WIC's maximum CO₂ specification by the Timely Cycle, September 9, 2026, CIG will begin to place underperformance caps on these locations to reduce the CO₂ content of the blended gas being physically delivered to WIC to less than 2%. 

 
CIG will continue to monitor the CO₂ content at these and other locations, including BOW, and will provide updates if there are any additions or deletions to the list.