BINDING OPEN SEASON: MWP FIRM STORAGE SERVICE - DeltaX

MountainWest Pipeline, LLC (MWP) is conducting a binding open season soliciting market support to provide a total of 9,400,000 Dth of Firm Storage Service (FSS) at Clay Basin under the DeltaX storage expansion project.

The reservation charge is available as an incremental recourse rate or negotiated rate, and is exclusive of charges for lost, gained, or unaccounted-for gas, gas used, or Annual Charge Adjustment. Shippers offering to take service under a negotiated rate should select the negotiated rate option on the Binding Bid Sheet. MWP requires a minimum ten-year contract term. It is currently anticipated that this additional capacity would be available as early as April 1, 2029.

The open season will begin at 1:00 PM MCT on Friday September 25, 2026, and will end at 3:00 PM MCT on Tuesday October 20, 2026. Creditworthiness must be established on or before 3:00 PM MCT on Monday October 19, 2026 prior to submitting a binding bid.

If you need additional information or have any questions, please refer to the open season documents on www.mwpipe.com or contact one of the following representatives:

Tyler Jones, Business Development Rep Sr 385-548-2636
Jack Czapiga, Business Development Rep Sr 801-694-0740
Xan Kotter, Business Development Rep Lead 801-558-6327
Jordan McDonough, Business Development Rep Lead 832-374-9513
Theeban Thavanandam, Business Development Rep III 918-607-9732
Joseph Hulse, VP Western Interstates Commercial 801-244-0829