U.S. natural gas infrastructure development is accelerating across key supply and demand corridors, with major new projects advancing regulatory milestones and reaching final investment decisions. The Federal Energy Regulatory Commission (FERC) is clearing the way for new transmission and storage capacity, while developers are greenlighting large-scale pipelines to move Permian Basin production toward Gulf Coast LNG terminals. Together, these efforts reflect rising confidence in long-term gas demand for both domestic power generation and global LNG exports, even as environmental and legal challenges continue to shape project timelines.
FERC advances gas projects amid new legal challenges
The Federal Energy Regulatory Commission (FERC) is moving multiple natural gas infrastructure projects through environmental review while facing renewed opposition on others. FERC staff issued favorable environmental assessments for the Mountain Valley Pipeline Southgate Extension and Golden Triangle Storage’s Spindletop expansion, recommending findings of no significant impact with mitigation measures. The $1.4 billion Southgate project, led by EQT and NextEra, would extend gas delivery into North Carolina by 2028, while Golden Triangle’s Texas storage expansion would double capacity to 61.5 Bcf to support Gulf Coast LNG demand. At the same time, environmental groups have filed rehearing requests against Transco’s Northeast Supply Enhancement and Rio Grande LNG/Rio Bravo projects, alleging FERC failed to address procedural, climate, and environmental justice concerns.
Permian-to-Gulf Coast egress strengthens with Eiger Express approval
A consortium of WhiteWater Midstream, Oneok, MPLX, and Enbridge reached a final investment decision on the 450-mile Eiger Express pipeline, a 2.5-Bcf/d intrastate line connecting the Permian Basin to the Houston-area Katy Hub by mid-2028. The project, operated by WhiteWater, will enhance Permian takeaway capacity and support rising Gulf Coast gas demand. Eiger joins a growing wave of Permian egress expansions—including Energy Transfer’s Desert Southwest pipeline, Tallgrass’s Permian-to-Rockies project, and DeLa Express—that are reshaping regional gas flows. Upcoming expansions from WhiteWater, Kinder Morgan, and Energy Transfer are expected to further relieve constraints, helping stabilize Waha prices after the severe discounting of 2024, though basis spreads to Henry Hub remain wide.
ARM Energy moves forward with Mustang Express pipeline
Privately held ARM Energy Holdings has sanctioned the $2.3 billion Mustang Express pipeline, a 236-mile, 2.5-Bcf/d intrastate line that will feed Sempra Infrastructure’s Port Arthur LNG expansion. Scheduled for completion in late 2028 or early 2029, the system will run from Tres Palacios Storage through the Katy Hub to Port Arthur, with Sempra as anchor shipper and an open season planned for additional capacity. Backed by PIMCO and other investors, ARM has already secured key materials and 300,000 hp of compression for the project. Analysts view Mustang Express as a strategic link between Texas gas hubs, storage, and LNG facilities—improving regional efficiency and market balance. The project complements Sempra’s $12 billion Port Arthur LNG expansion, which will double capacity to 13 mtpa by 2031, and integrates with new Permian-to-Katy pipelines such as Matterhorn Express, Eiger Express, and Traverse, reinforcing Katy’s growing role as a Gulf Coast gas hub.
The latest wave of pipeline and storage investments underscores the industry’s drive to expand and modernize gas transportation networks amid shifting market dynamics. With FERC approvals progressing, multi-billion-dollar projects such as Eiger Express and Mustang Express advancing toward construction, and LNG-driven demand growth sustaining momentum, the Gulf Coast is rapidly cementing its role as the central hub for U.S. gas flows. Still, ongoing litigation and regulatory scrutiny highlight the balancing act between infrastructure expansion, environmental stewardship, and energy reliability that will define the sector’s next phase of growth.