Pre-filing Approval for Desert Southwest Expansion Project
FERC eLibrary: Gas & Pipeline Orders - ChangeBridge
Summary
FERC's Office of Energy Projects issued a delegated order approving Transwestern Pipeline Company, LLC's request to use the pre-filing review process for the planned Desert Southwest Expansion Project. The approval was granted under Docket PF26-9. This procedural milestone initiates the pre-filing review process before formal application filing.
What changed
FERC issued a delegated order approving Transwestern Pipeline Company's request to commence pre-filing review for the Desert Southwest Expansion Project under Docket PF26-9. The order authorizes the company to use FERC's pre-filing review process, which allows for early environmental review, stakeholder outreach, and agency coordination before a formal application is submitted.
Transwestern Pipeline should now follow FERC's established pre-filing procedures, including engaging with stakeholders and responding to agency comments during the review period. This approval does not grant construction authority or certificate rights—those require separate formal proceedings. No immediate compliance deadlines or penalties apply to this procedural step. The pre-filing process typically precedes the formal certificate application and environmental review under NEPA.
Source document (simplified)
Document Info for Accession Number: 20260403-3022
Details Document: 04/03/2026
Filed: 04/03/2026
Posted: 04/03/2026 10:33:06 AM
First Received Date: 04/03/2026 10:12:39 AM
Security Level: Public
Official: Yes
E-filing: No
Non-decisional: No
Category: Issuance
Library: Gas
Aperture: 0
File Type:
Description* :** Letter to Transwestern Pipeline Company, LLC approving the 03/27/2026 request to use FERC's pre-filing review process for the planned Desert Southwest Expansion Project under PF26-9.
File List
| Docket | Sub-Docket | Type |
| --- | --- | --- |
| PF26-9 | 000 | On Document |
| Document Class | Document Type |
| --- | --- |
| Agreement/Understanding/Contract | Memoranda of Understanding(MOU)/Memoranda of Agreement (MOA) |
| Order/Opinion | Delegated Order |
| Correspondent | Last Name | First Name | MI | Role/Org |
| --- | --- | --- | --- | --- |
| RECIPIENT | Langston | M | | TRANSWESTERN PIPELINE COMPANY LLC |
| AUTHOR | Turpin | T | L | OFFICE OF ENERGY PROJECTS |
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