WhiteWater-led jv takes FID on 2.5-bcfd Permian basin gas pipeline

Oneok, WhiteWater, MPLX LP, and Enbridge, through their existing Matterhorn joint venture, have taken final investment decision on the 2.5-bcfd Eiger Express pipeline to transport natural gas from the Permian basin to the Gulf Coast.

Aug. 25, 2025

2 min read

Oneok Inc., WhiteWater, MPLX LP, and Enbridge Inc., through their existing Matterhorn joint venture, have taken final investment decision (FID) on the 2.5-bcfd Eiger Express pipeline to transport natural gas from the Permian basin to the Gulf Coast.

The 450-mile, 42-in. OD pipeline will deliver Permian gas to the hub near Katy, Tex. (west of Houston), and holds reserved capacity for deliveries to the Corpus Christi, Tex., market.

WhiteWater will build and operate the pipeline and expects it to enter service mid-2028, pending the receipt of customary regulatory and other approvals. The project is supported by firm transportation agreements with contract terms of 10 years or longer.

The Eiger Express pipeline JV is owned 70% by Matterhorn, 15% by Oneok, and 15% by MPLX. Oneok and MPLX's direct ownership interests in the Eiger Express pipeline joint venture are incremental to their ownership through the Matterhorn jv, resulting in 25.5% and 22% ownership in the pipeline, respectively.

I Squared, MPLX, and Enbridge earlier this year acquired equity interests of Devon Energy Corp. and Ridgemont Equity Partners in the 2.5-bcfd Matterhorn Express pipeline (OGJ Online, May 8, 2025), which also delivers Permian gas to the Houston area. Oneok’s portion of Matterhorn Express came via its 2024 acquisition of EnLink Midstream LLC. WhiteWater owns 65% of Matterhorn Express.