By Katie Dyl, Trinity Manning-Pickett, Laia Munoz-Cortijo
Natural gas pipeline projects completed in the United States in 2025 increased capacity by approximately 6.3 bf/d (178.3 x 106 m3/d), according to the US Energy Information Administration’s (EIA’s) recently updated Natural Gas Pipeline Projects Tracker. A substantial portion, 85%, or 5.3 bcf/d (150.07 x 106 m3/d), of this new capacity is dedicated to delivering natural gas to the South Central region of the United States. This region includes the Gulf Coast, where much of the nation’s growing natural gas demand, particularly from liquefied natural gas (LNG), is concentrated. The new capacity primarily connects both new and existing supply sources to consumers in the region.
Approximately 65% of the total pipeline capacity built in 2025 consists of intrastate pipelines, continuing the recent trend of intrastate pipeline builds outpacing interstate capacity additions. These pipelines operate primarily within state lines and are therefore not subject to the jurisdiction of the US Federal Energy Regulatory Commission.
The new intrastate capacity built in 2025 largely functions as gathering systems, which are essential for transporting natural gas from producers into the wider transmission system. Two such projects completed in 2025 expanded pipeline capacity by a combined 3.5 bcf/d (99.1 x 106 m3/d) to connect natural gas production from the natural gas-producing Haynesville formation to the Gillis Hub in southeastern Louisiana. The Louisiana Energy Gateway project added 1.8 bcf/d (50.9 x 106 m3/d), and the New Generation Gas Gathering system added 1.7 bcf/d (48.1 x 106 m3/d). Both were in service as of October 2025.
Data source: US Energy Information Administration
In addition, three major projects expanded natural gas pipeline capacity for delivery to growing demand centers on the Gulf Coast by a combined 1.8 bcf/d. The Evangeline Pass Expansion project added 1.1 bcf/d (31.1 x 106 m3/d), and the East Lateral Xpress Project added 0.3 bcf/d (8.4 x 106 m3/d). These two projects deliver feedgas directly to Plaquemines LNG, which shipped its first cargo in 2025. The Texas to Louisiana Pathway Project added 0.4 bcf/d (11.3 x 106 m3/d) in interstate capacity from Texas through to eastern Louisiana.
About The Authors
Katie Dyl, Trinity Manning-Pickett, Laia Munoz-Cortijo are research analysts for the US Energy Information Administration
