Transco Southeast Supply Enhancement
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Sources disagree on some of this page's facts. Each value is shown with its sources; see Sources disagree.
Transco Southeast Supply Enhancement is a natural gas pipeline expansion, operated by Williams (Transco). Construction began in 2026.[1]
| Transco Southeast Supply Enhancement | |
|---|---|
| Also called | Southeast Supply Enhancement Project[6], SSEP, SESE, Eden Loop, Salem Loop |
| General information | |
| Project type | Expansion[4] |
| Status | Under construction[4] |
| Commodity | Natural gas[4] |
| Operator | Williams (Transco) |
| Owner and operator | |
| Facility projects | |
| States | VA, NC or AL, GA, NC, VA[7][8] or AL, GA, NC, SC, VA[4][sources disagree] |
| Counties | Alabama: Coosa Georgia: Henry, Walton North Carolina: Cleveland, Davidson, Forsyth, Gaston, Guilford, Iredell, Lincoln, Rockingham South Carolina: Anderson Virginia: Pittsylvania[9] |
| Approved | 5 March 2025[7] or 29 January 2026[9][sources disagree] |
| Construction started | 2 March 2026[10] |
| FERC docket | CP25-10[6] |
| FERC pre-filing docket | PF24-2[6] |
| Contractors | |
| Technical information | |
| Length | 55.3 mi[4] or 54.9 mi[7][8][sources disagree] |
| Pipe size | 42"[4] |
| Wall thickness | 0.74 and 0.89 in[5] |
| Grade | X70[5] |
| Welding | Mechanized[5] |
| Capacity | 1597 MMcf/d (FERC project list)[7][8] or 1600 MMcf/d additional capacity (EIA)[4][sources disagree] |
| Cost | $1530 million (EIA estimate; no dollar year given)[4] |
| On ProvenHand | |
| Hands listed | 0 |
Transco Southeast Supply Enhancement is a natural gas pipeline expansion, operated by Williams (Transco). Construction began in 2026.[1]
Contractorsedit
| Contractor | Work | Prime or sub | Scope | Spread | Years |
|---|---|---|---|---|---|
| Associated Pipe Line Contractors[5] | Eden and Salem loops | ||||
| Associated Pipe Line Contractors, Inc.[11] | Prime | Salem Loop, 24.1 miles of 42-inch for Williams/Transco (Local 798 pre-job 17211 dated 2026-03-17, approx. completion 2026-10-10) | Salem Loop | from 1 January 2026 | |
| Associated Pipe Line Contractors, Inc.[11] | Prime | Eden Loop, 30.42 miles of 42-inch for Williams/Transco (Local 798 pre-job 17211 dated 2026-03-17, approx. completion 2026-10-10) | Eden Loop | from 1 January 2026 | |
| Hoover Construction Company[12] | Rock drilling and blasting | Under Associated Pipe Line Contractors, Inc. | Drilling and blasting on 52 miles of 42-inch in Guilford, Forsyth, Davidson and Rockingham Counties, NC, and Pittsylvania County, VA (the Salem and Eden loops) | from 23 March 2026 | |
| Associated Pipe Line Contractors, Inc.[5][11] | Prime | Eden and Salem loops | |||
| RMS Welding Systems[5] | Mechanized welding | Under Associated Pipe Line Contractors, Inc. | mechanized welding system (MOWII) for the Eden and Salem loops |
Spreads
| Spread | Prime contractor | Dates |
|---|---|---|
| Eden Loop[5][9][10][11] | Associated Pipe Line Contractors, Inc. | from 2 March 2026 |
| Salem Loop[5][9][10][11] | Associated Pipe Line Contractors, Inc. | from 2 March 2026 |
Crossings
Sources disagree
These sources give different values for the same fact. Each value is listed with the sources that give it.
| Fact | Values given |
|---|---|
| Approved | |
| Capacity | |
| Length | |
| States |
Crew on ProvenHand
No one on ProvenHand has listed this job yet.
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Referencesedit
- pgjonline.com
- marcellusdrilling.com
- williams.com
- “U.S. natural gas pipeline projects (Natural Gas Pipeline Projects)”. U.S. Energy Information Administration. Retrieved 3 October 2026.
- “Projects (MOWII)”. RMS Welding Systems. Retrieved 3 October 2026.
- “FERC eLibrary docket CP25-10”. Federal Energy Regulatory Commission. 29 October 2024. Retrieved 3 October 2026.
- “FERC: Approved Major Pipeline Projects (1997-Present)”. Federal Energy Regulatory Commission. Archived from the original on 1 July 2025. Retrieved 3 October 2026.
- “FERC: Major Pipeline Projects Pending (Onshore)”. Federal Energy Regulatory Commission. Archived from the original on 20 December 2025. Retrieved 3 October 2026.
- “Order Issuing Certificate and Approving Abandonment, Transcontinental Gas Pipe Line Company, LLC, Southeast Supply Enhancement Project (CP25-10)”. Federal Energy Regulatory Commission. 29 January 2026. Retrieved 3 October 2026.
- “Biweekly Construction Status Report for 03/02/2026 to 03/15/2026, Southeast Supply Enhancement Project (CP25-10)”. Transcontinental Gas Pipe Line Company, LLC (filed with FERC). 20 March 2026. Retrieved 3 October 2026.
- “Pre-job list (job 17211: Williams/Transco Salem Loop and Eden Loop), Pipeliners Local Union 798”. Pipeliners Local Union 798. March 2026. Retrieved 3 October 2026.
- “Hoover Construction job notice: Associated Pipeline Contractors, North Carolina (dated 2026-03-23)”. Teamsters National Pipeline. 23 March 2026. Retrieved 6 October 2026.
- “Biweekly Construction Status Report for 03/16/2026 to 03/29/2026, Southeast Supply Enhancement Project (CP25-10)”. Transcontinental Gas Pipe Line Company, LLC (filed with FERC). 6 April 2026. Retrieved 3 October 2026.
- “Biweekly Construction Status Report for 08/17/2026 to 08/30/2026, Southeast Supply Enhancement Project (CP25-10)”. Transcontinental Gas Pipe Line Company, LLC (filed with FERC). 22 September 2026. Retrieved 3 October 2026.
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