Mustang Express Pipeline
| Part of the Global Gas Infrastructure Tracker, a Global Energy Monitor project. |
Mustang Express Pipeline is a proposed gas pipeline in the United States.
Location
Table 1: Route details
| Route | Segment | Start/end | Countries/areas |
|---|---|---|---|
|
Cougar Lateral | Start: Tres Palacios Storage, Texas | United States |
|
Mainline | Start: | United States |
|
Golden Triangle/Spindletop Storage Lateral | Start: Spindletop, Texas | United States |
3 of 3 segments have a mapped route in the database.
■ Proposed
Project details
Table 2: Pipeline details
| Segment | Status | Fuel | Capacity | Length | Diameter | Pressure |
|---|---|---|---|---|---|---|
| Cougar Lateral | proposed[3][2] | gas[3][2] | – | 55 mi[1][2] | 42 in[3][2] | – |
| Mainline | proposed[3] | gas[3] | – | 178 mi[1][2] | 42 in[3][2] | – |
| Golden Triangle/Spindletop Storage Lateral | proposed[3] | gas[3] | – | 3 mi[3][2] | 42 in[3][2] | – |
Table 3: Project timeline
| Segment | Proposal year | FID | Construction year | Start year |
|---|---|---|---|---|
| Cougar Lateral | 2025[3] | 2025 (FID)[3] | 2027[4] | 2029 (planned)[2] |
| Mainline | 2025[3] | 2025 (FID)[3] | 2027[4] | – |
| Golden Triangle/Spindletop Storage Lateral | 2025[3] | 2025 (FID)[3] | 2027[4] | – |
Table 4: Cost
| Segment | Cost |
|---|---|
| Cougar Lateral | US$2.3 billion[1][3][2] |
| Mainline | US$2.3 billion[1][3] |
| Golden Triangle/Spindletop Storage Lateral | US$2.3 billion[1] |
Table 5: Ownership
| Segment | Operator | Owner | Parent |
|---|---|---|---|
| Cougar Lateral | – | ARM Energy Holdings LLC; PIMCO[3][2] | – |
| Mainline | ARM Energy Holdings LLC[2] | ARM Energy Holdings LLC; PIMCO[3][2] | – |
| Golden Triangle/Spindletop Storage Lateral | ARM Energy Holdings LLC[3] | ARM Energy Holdings LLC; PIMCO[3] | – |
Background
Cougar Lateral
The Cougar Lateral is a 55-mile segment of the Mustang Express Pipeline. It runs from the Tres Palacios Storage to the Katy Hub in Katy, Texas.[3] A Houston Chronicle article from October 2025 placed Tres Palacios Storage in Bay City.[1]
Mainline
The Mustang Mainline is the 178-mile segment of the Mustang Express Pipeline. It runs from the Katy Hub in Katy, Texas to Port Arthur, Texas.[3][1] ARM Energy Holdings announced a final investment decision on the 42-inch Mustang Express Pipeline on October 9, 2025. The $2.3 billion project had an anchor shipper commitment from Sempra Infrastructure for its Port Arthur LNG Phase 2 project. ARM Energy was to build and operate it with Pacific Investment Management Company and co-investors. The pipelines have a total capacity of 2.5 billion cubic feet per day and were expected to be finished in late 2028 or early 2029.[3] A Vinson & Elkins announcement from the same day said construction was scheduled to begin in late 2027, with full operations in late 2028.[4]
Golden Triangle/Spindletop Storage Lateral
The Golden Triangle and Spindletop Storage Lateral is a three-mile segment of the Mustang Express Pipeline around Port Arthur, Texas.[3]
Articles and resources
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Texas energy companies approve $2.3-billion gas pipeline". chron.com. Retrieved 2026-11-10.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 "Natural Gas Pipeline Projects, U.S. Energy Information Administration, August 2026". eia.gov. Retrieved 2026-11-10.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.20 3.21 3.22 3.23 3.24 3.25 3.26 3.27 "ARM Energy and PIMCO Announce $2.3 Billion Investment in Mustang Express Pipeline". armenergy.com. Retrieved 2026-11-10.
- ↑ 4.0 4.1 4.2 4.3 "ARM Energy and PIMCO Announce $2.3 Billion Investment in Mustang Express Pipeline - Vinson & Elkins". velaw.com. Retrieved 2026-11-05.
Additional data
To access additional data, including an interactive map of gas pipelines, a downloadable dataset, and summary data, please visit the Global Gas Infrastructure Tracker on the Global Energy Monitor website.
