Transco Leidy Southeast Expansion

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Sources disagree on some of this page's facts. Each value is shown with its sources; see Sources disagree.

Transco Leidy Southeast Expansion is a natural gas pipeline, operated by Williams (Transco). It entered service in 2016. It runs 30 miles of 42" pipe.^[1]

Transco Leidy Southeast Expansion
Also called	Leidy Southeast^[4], Leidy Southeast Expansion Project, Leidy Southeast Expansion^[4]
General information
Project type	Expansion^[2] or Loop^[5]^{[sources disagree]}
Status	In service^[2]
Commodity	Natural gas^[2]
Operator	Williams (Transco)
Owner and operator	Transcontinental Gas Pipe Line Company, LLC^[4]
Facility projects	Skillman Loop^[6] Transco Compressor Station 205 (Leidy Southeast Expansion)^[5] Transco Compressor Station 515 (Leidy Southeast Expansion)^[5] Transco Compressor Station 517 (Leidy Southeast Expansion)^[5] Transco Compressor Station 520 (Leidy Southeast Expansion)^[5]
States	PA, NJ or MD, NC, NJ, PA, VA^[4] or MD, PA, VA^[2]^{[sources disagree]}
Counties	New Jersey: Hunterdon, Mercer, Somerset Pennsylvania: Columbia, Luzerne, Lycoming, Monroe^[5]
Approved	18 December 2014^[4][5]
In service	5 January 2016^[2]
FERC docket	CP13-551^[4]
FERC pre-filing docket	PF13-5^[4]
Technical information
Length	30 mi^[2][4][5]
Pipe size	42"^[2][5]
Capacity	525 MMcf/d (FERC project list)^[2][4]
Horsepower added	71,900 hp^[5]
Cost	$610 million (EIA estimate; no dollar year given)^[2] or approximately $607 million (Transco's estimate in the certificate order)^[5]^{[sources disagree]}
On ProvenHand
Hands listed	0

Transco Leidy Southeast Expansion is a natural gas pipeline, operated by Williams (Transco). It entered service in 2016. It runs 30 miles of 42" pipe.^[1]

Sources disagree

These sources give different values for the same fact. Each value is listed with the sources that give it.

Fact	Values given
Project type	Expansion^[2] Loop^[5]
Cost	$610 million (EIA estimate; no dollar year given)^[2] approximately $607 million (Transco's estimate in the certificate order)^[5]
States	PA, NJ (on this page, no source given) MD, NC, NJ, PA, VA^[4] MD, PA, VA^[2]

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Referencesedit

sec.gov · wmb_20151231x10k.htm
“U.S. natural gas pipeline projects (Natural Gas Pipeline Projects)”. U.S. Energy Information Administration. Retrieved 3 October 2026.
s3.amazonaws.com · Ongoing-Projects-The-Americas-May-2017.p
“FERC: Approved Major Pipeline Projects (1997-Present)”. Federal Energy Regulatory Commission. Archived from the original on 1 July 2025. Retrieved 3 October 2026.
“Order Issuing Certificate and Approving Abandonment, Transcontinental Gas Pipe Line Company, LLC, Leidy Southeast Expansion Project (CP13-551)”. Federal Energy Regulatory Commission. 18 December 2014. Retrieved 4 October 2026.
“FERC eLibrary filing (CP13-551): Migratory Bird Habitat Restoration Plan for the Leidy Southeast Expansion Project - Skillman Loop”. Federal Energy Regulatory Commission eLibrary (public comment filing). 1 November 2013. Retrieved 4 October 2026.

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