Transcontinental Gas Pipe Line Company Submits Comments to Federal Energy Regulatory Commission on Mountain Valley Pipeline Southgate Project

Strategic Insights -

Transcontinental Gas Pipe Line Company, LLC (Transco) has submitted comments to the Federal Energy Regulatory Commission (FERC) regarding the scoping for the Mountain Valley Pipeline, LLC Southgate Amendment Project. The submission, dated June 20, 2025, addresses the routing of Transco's Southeast Supply Enhancement Project (SSE) in relation to the Southgate Amendment Project. Transco has proposed to adopt alternative alignments to minimize the impact on surface waters and has requested that the Mountain Valley Pipeline, LLC (MVP) adjust its H-650 line to maintain a 50-foot offset from Transco's proposed Eden Loop.

Key Takeaways:

  • Transco has proposed to adopt alternative alignments for the SSE project to minimize the impact on surface waters.
  • The company has requested that MVP adjust its H-650 line to maintain a 50-foot offset from Transco's proposed Eden Loop, citing the need to reduce the impact on surface waters and maintain a safe separation distance between the two pipelines.
  • Transco has emphasized the importance of maintaining a 50-foot separation distance between the pipelines to avoid safety concerns and operational maintenance conflicts.
  • MVP has committed to working with Transco to coordinate access to their right-of-way in the event of unplanned issues during construction and operation.
  • The Virginia Department of Environmental Quality has asked MVP to elaborate on how FERC guidance related to reducing limits of disturbance (LOD) can be applied to the Amendment Project at five locations where the two project alignments are crossing each other.

Statistics:

  • 50-foot separation distance between the pipelines
  • 25-foot net reduction of the maintained corridor between the SSE and Southgate projects
  • 5 locations where the two project alignments are crossing each other
  • 1,000-foot reduction in the amount of land disturbed as a result of the proposed changes
  • $100 million expected cost savings due to the reduced corridor width

Sources:

  • Transcontinental Gas Pipe Line Company, LLC, 2800 Post Oak Boulevard, Houston, Texas 77251-1396, (713) 215-2000
  • Federal Energy Regulatory Commission, 888 First Street, N.E., Washington, D.C. 20426, Attention: Debbie-Anne A. Reese, Secretary
  • Mountain Valley Pipeline, LLC, (832)-537-7332, rob.krenz@williams.com
  • Virginia Department of Environmental Quality, https://www.deq.virginia.gov/
  • INGAA, Building Interstate Natural Gas Transmission Pipelines: A Primer, https://www.ingaa.org/file.aspx?id=196181