Southeast Supply Enhancement (Transco/Williams)
DEQ will update this page with permitting activity, information on public comment period and hearings and any news releases related to the Southeast Supply Enhancement (Transco/Williams) project.
Land Quality (DEMLR) Permitting
Division of Energy, Mineral, and Land Resources reviews applications for erosion and sediment control plan approval and construction stormwater (NCG01) permits for land disturbance.
More information will be added here as it is available.
Water Quality Permitting
The Division of Water Resources reviews applications for 401 certifications for projects impacting streams and stream buffers.
July 28, 2025: Public hearing notification
June 6, 2025: 401 certification application
Air Quality Permitting
The Division of Air Quality (DAQ) currently permits three compressor stations in North Carolina associated with this pipeline: Station 150, Station 155, and Station 160. The Southeast Supply Enhancement Project will involve upgrades at Station 150 and Station 155 that require modifications to the air quality permits at those sites. No revisions to Station 160 are anticipated.
DAQ received applications to modify the air quality permits at stations 150 and 155 on April 22, 2025. Both applications are under review by the Division. On Oct. 7, 2025, DAQ announced public comment periods to receive public feedback on the proposed draft modifications to the permits for both compressor station. DAQ also scheduled two public hearings to receive comments on the draft air quality permits. Public comments on both draft permits will be accepted until Nov. 19, 2025.