Pennsylvania Pipeline Projects Get Green Light From FERC

Two interdependent projects, National Fuel Gas Supply Corporation’s (National Fuel) FM100 Project and Transcontinental Gas Pipe Line Company’s (Transo) Leidy South Project, both in Pennsylvania, USA, have received favorable environmental assessments from US Federal Energy Regulatory Commission (FERC), allowing the projects to move forward. Both projects are aimed at modifying and expanding current pipeline and creating additional transportation capacity.


National Fuel is seeking FERC approval to construct and operate its FM100 Project. The FM100 Project would modernize a portion of National Fuel’s existing pipeline system and create 330,000 dekatherms per day of additional transportation capacity.

Specifically, National Fuel seeks authorization for the construction of about 29 miles (46 km) of new 20-in. (508-mm) diameter pipeline (Line YM58) in McKean and Potter Counties, Pennsylvania, USA; construction of about 1.4 miles (2.25 km) of 24-in. (609-mm) diameter pipeline loop (Line YM224 Loop) in Potter County, Pennsylvania; construction of about 0.4 miles (0.6 km) of 12-in. (304-mm) diameter pipeline (Line KL Extension) in McKean County, Pennsylvania; construction of the new Marvindale Compressor Station (Marvindale CS) in McKean County, Pennsylvania; construction of the new Tamarack Compressor Station (Tamarack CS) in Clinton County, Pennsylvania; modification of the existing Leidy M&R Station in Leidy Township, Clinton County, Pennsylvania; abandonment in place of about 45 miles (72-km) of 12-in. (304-mm) diameter pipeline (Line FM100) and appurtenances in Clearfield, Elk, Cameron, and Potter Counties, Pennsylvania; abandonment by removal of the existing Costello Compression Station (Costello CS) in Potter County, Pennsylvania; abandonment by removal of the existing Station WHP-MS-4317X in Potter County, Pennsylvania; construction of the Marvindale Interconnect in McKean County, Pennsylvania; construction of the Carpenter Hollow over-pressurization protection station in Potter County, Pennsylvania; and construction of associated facilities, such as mainline valves and other appurtenant facilities. The estimated cost of the project is US$279 million.

Marvindale Compressor Station

Marvindale CS will consist of two reciprocating compressor units (one Caterpillar G3608A4 Engine/Ariel JGC/4 compressor package and one Caterpillar G3516 Engine/Ariel JGT/4 compressor package) rated 2675 hp (1995 kW) and 1380 hp (1029 kW), respectively, for a total of 4055 hp (3025kW) of compression. This new compression is required to provide currently contracted transportation services. The proposed compression at Marvindale CS will provide similar functionality to the compression at the Costello CS, which National Fuel proposes to abandon. The required Marvindale CS modernization horsepower is greater than the amount of horsepower at the Costello CS because of the differing hydraulics in connecting National Fuel’s western and eastern systems through Line YM58.

Tamarack Compressor Station

National Fuel seeks authorization to construct and operate the new Tamarack CS on the existing Line YM53 near the Leidy Interconnect LDC 2245 at the Leidy M&R Station in Clinton County, Pennsylvania. The proposed compressor station would consist of two gas turbine compressor units (Solar Taurus 70 Turbine/Compressor packages) totaling 22,220 hp (16,576 kW) of compression.



Transco has filed an application with FERC to construct and operate its Leidy South project in Pennsylvania. The project will expand Transco’s existing pipeline system to enable it to provide an additional 582,400 dekatherms per day of firm transportation service to three shippers and abandon a small portion of its existing facilities.

In order to create the firm transportation capacity under the project, Transco requests authorization to construct, modify, and operate the following compressor stations:

Compressor Station 605

Located in Wyoming County, Pennsylvania, Transco will increase the certificated station horsepower of the two electric motor-driven units from a combined total of 30,000 hp (22,380 kW) to a combined total of 42,000 hp (31,332 kW) and modify existing coolers.

Compressor Station 607

Located in Luzerne County, Pennsylvania, Transco will installation two new Solar Titan 130-23502S turbine-driven compressor units, each rated 23,465 hp (17,504 kW), for a total addition of 46,930 hp (35,009 kW).

Compressor Station 610

Located in Columbia County, Pennsylvania, Transco will add 33,871 hp (25,267 kW) of compression, including the addition of one new Solar Titan 250 gas turbine-driven compressor unit rated at 31,871 hp (23,775 kW); increase the certificated horsepower of the two existing electric motor-driven units from 20,000 hp (14,920 kW) each to 21,000 hp (15,666 kW); re-wheel the two-existing electric-driven compressors; and add additional gas cooling.

Compressor Station 620

Located in Schuylkill County, Pennsylvania, Transco will install one new Solar Titan 250 gas turbine-driven compressor unit rated at 31,871 hp.