HOUSTON, TEXAS (By Isaac Silvestre, Energy Analytics Institute, 24.Nov.2025, Words: 238) — WhiteWater announced expansion of the Eiger Express Pipeline’s mainline capacity from 2.5 billion cubic feet per day (Bcf/d) to 3.7 Bcf/d, having secured additional firm transportation agreements since WhiteWater announced the project in Aug. 2025.
In order to effectuate this increase, the mainline has been upsized from a 42″ to a 48″ diameter pipeline, along with incremental compression being installed.
Expansion of pipeline’s capacity is not expected to affect its previously announced expected in-service-date of mid-2028, pending the receipt of customary regulatory and other approvals, WhiteWater announced on 24 Nov. 2025 in an official statement.
The Eiger Express Pipeline, designed to transport natural gas from the Permian Basin in West Texas to the Katy area, is owned by a joint venture (JV) among the Matterhorn JV (70% WI), ONEOK (15% WI) and MPLX (15% WI). The Matterhorn JV is owned by WhiteWater (65% WI), ONEOK (15% WI), MPLX (10% WI), and Enbridge (10% WI). The JV owns long-haul natural gas pipelines which transport gas from the Permian Basin to the Gulf Coast with direct connections to LNG export markets.
WhiteWater’s stake in the Matterhorn JV is owned by FIC and I Squared Capital. ONEOK’s and MPLX’s direct ownership interests in the Eiger Express Pipeline JV are incremental to their ownerships in the Matterhorn JV.
____________________
By Isaac Silvestre reporting from Houston. © 2025 Energy Analytics Institute (EAI). All Rights Reserved.
