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Pipeline

Desert Southwest Pipeline

Entities

Owner: Energy Transfer LP

Status Planning

Synopsis

The Desert Southwest Expansion Project is a proposed interstate gas-pipeline system in FERC pre-filing environmental review.

PF26-9-000 is pre-filing, not a certificate application or approval. No CP docket or Pinal County case was verified.

The community tracker currently labels this project Planning. The dated record and official links below should be used to check that label and any later change.

Timeline & Milestones

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  1. Completed Initial profile public process

    FERC scoping comments due — Desert Southwest Pipeline

    Deadline for public input on FERC pre-filing environmental scoping. Docket PF26-9-000. Energy Transfer / Transwestern expansion, ~520 miles, 48-inch, up to 2.3 Bcf/d Permian-to-Arizona/New Mexico.

    FERC scoping comments due — Desert Southwest Pipeline

    Deadline for public input on FERC pre-filing environmental scoping. Docket PF26-9-000. Energy Transfer / Transwestern expansion, ~520 miles, 48-inch, up to 2.3 Bcf/d Permian-to-Arizona/New Mexico.

    Full date and time
    Wednesday, August 5, 2026
    Status
    Completed

    Related projects: Desert Southwest Pipeline

    Related entities: Energy Transfer LP, Federal Energy Regulatory Commission (FERC)

  2. Completed Researched project record

    Project announced

    Energy Transfer announced the proposal.

    Desert Southwest project page
  3. Completed Researched project record

    Open season confirmed demand in October 2025

    Exact day was not published in the fetched timeline.

    Desert Southwest project page
  4. Completed Researched project record

    Pre-filing docket opened

    PF26-9-000 opened at FERC.

    FERC Desert Southwest Expansion Project
  5. Current Researched project record

    FERC accepted pre-filing review

    Environmental pre-filing began; this was not project approval.

    FERC Desert Southwest Expansion Project
  6. Completed Researched project record

    Coolidge scoping session

    Official in-person scoping session completed.

    Notice — PF26-9-000
  7. Completed Researched project record

    Scoping comments due

    Historic scoping deadline passed.

    Notice — PF26-9-000
  8. Proposed Researched project record

    Estimated construction start in 2028 Q2

    Applicant estimate, not agency authorization.

    Desert Southwest project page
  9. Proposed Researched project record

    Expected in-service in 2029 Q4

    Applicant estimate.

    Desert Southwest project page

How to get involved

How to participate in Desert Southwest Pipeline — FERC Docket PF26-9-000

Use the verified project record and monitor the correct agency for the next live notice.

Use PF26-9-000 in eComment, eFiling, eLibrary, and eSubscription.

  1. Save the exact identifiers: FERC Docket PF26-9-000

    Use FERC Docket PF26-9-000 in searches, subject lines, comments, and records requests. Do not substitute a similarly named project or general-policy docket.

  2. Read the project-specific record

    Open the official record linked below and verify the present status, scope, meeting location, submission method, and deadline before acting.

  3. Treat old deadlines as closed

    The August 5, 2026 scoping deadline and July/August sessions are closed. Later filings may still be submitted unless FERC directs otherwise.

  4. Monitor the next live notice

    Subscribe to PF26-9-000 for every filing. Use eComment for brief comments or eFiling for longer filings; verify any new deadline in the docket.

Additional Resources

Upcoming

No upcoming events currently posted.

Past events

FERC scoping comments due — Desert Southwest Pipeline

Deadline for public input on FERC pre-filing environmental scoping. Docket PF26-9-000. Energy Transfer / Transwestern expansion, ~520 miles, 48-inch, up to 2.3 Bcf/d Permian-to-Arizona/New Mexico.

Full date and time
Wednesday, August 5, 2026
Status
Completed

Related projects: Desert Southwest Pipeline

Related entities: Energy Transfer LP, Federal Energy Regulatory Commission (FERC)