FERC takes input on Louisiana capacity project of Tennessee Gas

The Federal Energy Regulatory Commission is taking comment until Oct. 31 on an environmental assessment (EA) for the Southwest Louisiana Supply Project proposed by Tennessee Gas Pipeline Co. LLC.

Tennessee is requesting authorization to construct, operate, and maintain certain interstate natural gas transmission facilities located in Louisiana to provide 295,000 dekatherms per day of natural gas and firm transportation services on Tennessee’s 800 Line system. The purpose of the project is to meet contractual obligations with Mitsubishi Corp. and MMGS Inc.

Tennessee proposes to construct:

  • a 2.4-mile-long, 30-inch-diameter pipeline lateral in Madison Parish, Louisiana;
  • a 1.4-mile-long, 30-inch-diameter pipeline lateral in Richland and Franklin parishes, Louisiana;
  • five meter stations;
  • one new compressor station in Franklin Parish, Louisiana; and
  • replace a gas turbine engine at an existing compressor station in Rapides Parish, Louisiana.

This application was filed in October 2015. All project construction would take place in the state of Louisiana.

Pipeline Facilities

  • Delhi North Lateral – 2.4-mile, 30-inch-diameter lateral pipeline in Madison Parish; and
  • Delhi South Lateral – 1.4-mile, 30-inch-diameter lateral pipeline in Franklin and Richland parishes.

Compression Facilities

  • The proposed Delhi Compressor Station 836A (CS 836A) in Franklin Parish would consist of: a bi-directional compressor station consisting of a 15,900 horsepower (hp) ISO rated Mars 100 turbine-driven compressor unit; an outdoor gas discharge cooler; a 500-kkW natural gas-fired emergency generator, including outdoor jacket water cooler and exhaust silencer; anda water heater system, including pumps and natural gas-fired heater.
  • The existing Alexandria Compressor Station 827 (CS 827) modifications in Rapides Parish would consist of: replacement of a 13,400 hp ISO rated Solar Mars T-14000 turbine unit with a 15,900 hp ISO rated Solar Mars T-16000 turbine-driven compressor unit.

Other Facilities

  • In addition to the two lateral pipelines and new compression described above, Tennessee proposes to: install a new meter station and interconnection with the Midcontinent Express Pipeline (MEP) in Madison Parish, Louisiana; install a new meter station and interconnection with the Gulf Crossing Pipeline in Madison Parish, Louisiana; install a new meter station and interconnection with Enable Midstream Partners in Richland Parish, Louisiana; install a new meter station and interconnection with the Gulf South Pipeline in Richland Parish, Louisiana; and install of two new meter stations and interconnections with the Tiger Pipeline in Richland Parish, Louisiana.

All of the modifications, upgrades, or replacements would be located within existing authorized facilities. The modifications will include piping for bidirectional operations at three existing compressor stations: Alexandria Compressor Station CS 827 in Rapides Parish, Louisiana; Winnsboro Compressor Station 834 in Franklin Parish, Louisiana; Grenada Compressor Station 847 in Yalobusha County, Mississippi; as well as modifications for operational flexibility at the existing Kinder Compressor Station 823 in Jefferson Davis Parish, Louisiana. 

Construction is anticipated to commence during the fourth quarter of 2016 and is expected to last for approximately 16 months. Tennessee is expected to place the project facilities in-service by Feb. 1, 2018.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.