FERC seeks input on Dominion’s gas pipeline expansion in South Carolina

The Federal Energy Regulatory Commission is out for comment until Nov. 18 on an environmental assessment (EA) covering the Transco to Charleston Project, proposed by Dominion Carolina Gas Transmission LLC.

Dominion is requesting authorization to construct and operate new pipeline and compressor station facilities in South Carolina. The FERC staff concludes in the EA that approval of the proposed project, with appropriate mitigating measures, would not constitute a major federal action significantly affecting the quality of the human environment.

The project includes these facilities:

  • approximately 55 miles of 12-inch-diameter pipeline in Spartanburg, Laurens, Newberry, and Greenwood counties (Moore to Chappells pipeline);
  • approximately five miles of 4-inch-diameter pipeline in Dillon County (Dillon pipeline);
  • installation of two new 1,400-horsepower (hp) compressor units at the existing Moore Compressor Station in Spartanburg County;
  • construction of a new 3,150-hp compressor station in Dorchester County (Dorchester Compressor Station);
  • conversion of an existing 1,050-hp compressor unit from standby to base load at the existing Southern Compressor Station in Aiken County;
  • upgrades to the existing Charleston Town Border Station in Charleston County and to the existing Greenwood Town Border Station in Greenwood County; and
  • associated pipeline support facilities (metering and regulating stations, launcher and receiver assemblies, valves, and pipeline interconnects).

Dominion said this project is to provide 80,000 dekatherms (Dt) per day of natural gas firm transportation services in South Carolina to improve regional energy security, system resiliency, and to meet increasing demand for natural gas for local commercial, industrial, and power generation customers. The project’s target in-service date is Nov. 1, 2017.

The project has been fully subscribed by three customers under binding precedent agreements:

  • South Carolina Electric and Gas, 75,000 Dt;
  • Flakeboard Co. Ltd., 2,000 Dt; and
  • Wyman-Gordon, 3,000 Dt.

South Carolina Electric and Gas would use this gas as additional fuel gas supply to existing and future gas customers throughout its service area. Flakeboard, located in Bennettsville, South Carolina, would use gas from the project for manufacturing of particle board and other lumber products. Wyman-Gordon would use this gas for a metals manufacturing and finishing facility located approximately 0.5 mile northwest of the Dillon Pipeline.

The two pipeline segments are:

  • Moore to Chappells Pipeline – This would consist of approximately 54.8 miles of 12-inch-diameter natural gas steel transmission pipeline from the existing Moore Purchase facility in Spartanburg County, South Carolina, near the intersection of Pearson Town Road and Moore Duncan Highway. The new interconnect at the Moore Purchase facility would be constructed by Transcontinental Gas Pipeline Co. LLC (Transco) and would stem from an existing 30-inch and 36-inch-diameter pipeline. Dominion would install a 10-inch flange to connect the Transco pipeline to the start of the Moore to Chappells Pipeline. The Moore to Chappells Pipeline would be approximately 14% (i.e., approximately 7.3 miles) co-located with existing electric transmission and/or other natural gas pipeline rights-of-way.
  • Dillon Pipeline – This would consist of approximately 5.3 miles of 4-inch-diameter natural gas steel transmission pipeline from a new take-off (Reedy Creek Take-off) with Dominion’s existing 6-inch-diameter natural gas pipeline Line D in Dillon County, South Carolina, near the intersection of Centerville Road and Reedy Creek Road. The proposed pipeline would traverse a cross-country route in a northeasterly direction, terminating at the new Caldwell Drive Metering and Regulating (M&R) Station. The Dillon Pipeline right-of-way would be approximately 27% (i.e., approximately 1.4 miles) co-located with existing electric utility rights-of-way.
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.