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Dominion Energy Carolina Gas Transmission

Dominion Energy Carolina Gas Transmission, LLC transports natural gas to wholesale and direct industrial customers throughout South Carolina.

Operations and rates are regulated by the U.S. Department of Transportation's Pipeline Hazardous Materials Safety Administration and the Federal Energy Regulatory Commission (FERC).

About Our Pipelines

Dominion Energy operates approximately 1,500 miles of transmission pipeline in South Carolina and Georgia. These pipelines are between two and 24 inches in diameter and operate at pressures up to 1200 psi.

Pipeline Compressor Stations

What are Compressor Stations?
Compressor stations compress and push the gas through the pipeline at an optimal rate. Because friction and elevation changes along the pipeline can slow gas and reduce pressure, compressor stations are usually located between 40 and 70 miles apart. These stations help move natural gas 24 hours a day, seven days a week.

Safety
Every compressor station has emergency shutdown capabilities that help stop the unit and isolate and vent its piping. Dominion Energy Carolina Gas Transmission performs routine tests and maintenance of these shutdown features as required by pipeline regulations. During shutdowns, natural gas is routed around the station to ensure reliability. Compressor stations are operated and monitored remotely from Dominion Energy Carolina Gas Transmission's centralized control center by highly trained and experienced employees.

Pipeline Maintenance

Dominion Energy Carolina Gas Transmission performs the following routine activities to help ensure the safety and reliability of our pipelines:

  • Mowing: Pipeline rights of way are mowed annually, every other year or every third year based on FERC guidelines and Dominion Energy Carolina Gas Transmission's Right of Way Maintenance Plan.
  • Side trimming: Periodically when branches on trees form a canopy over the pipeline, Dominion Energy Carolina Gas Transmission will side-trim to make sure that the pipeline is visible from above so that it can be aerially patrolled for safety reasons.
  • Pipeline Integrity: Periodically, personnel insert inspection devices into the pipeline or conduct above-ground surveys using instruments to verify the integrity of the pipeline. These inspections typically involve multiple personnel, equipment and vehicles.
  • Leak survey: Conducted annually in some areas and semi-annually in other areas as prescribed by PHMSA, leak survey involves personnel walking and driving the right of way with instruments to check for gas.
  • CP survey: This involves multiple personnel walking and driving the right of way with instrumentation taking measurements.
  • Station maintenance: Personnel enter fenced facilities multiple times each year to take readings and conduct inspections and maintenance of the equipment.
  • Marker maintenance: Personnel in trucks replace damaged markers, paint markers, reset fallen markers, or add new markers on the pipeline where required.
  • Erosion repair: Typically conducted with backhoes and bulldozers to correct washouts that could expose the pipeline.
  • Aerial patrol: Conducted at least four times a year by slow, low-flying aircraft.

Pipeline Rights of Way

Pipeline Markers

Dominion Energy Carolina Gas Transmission's Pipeline rights of way are marked with signs showing the pipeline's approximate location and a telephone number where Dominion Energy Carolina Gas Transmission representatives can be reached. For security reasons, detailed maps of the pipeline are not publicly available; however, our representatives will be happy to show you where our pipeline is located in your area. Call 800-789-7272 for more information.

Use of the Right of Way

Land may be used for most residential, commercial, or agricultural purposes provided the use does not interfere with safe operation, maintenance, inspection, and repair of the pipeline or obstruct access.

Structures/activities that require a permit or other authorization

Dominion Energy Carolina Gas Transmission may allow some structures and activities within right-of-way in certain instances. If allowed, certain guidelines apply and a permit may be required. Examples include:

  • Fences
  • Water lines
  • Communication cables
  • Driveways
  • Roadways
  • Curbing
  • Electric lines
  • Overhead cables
  • Sewer lines
  • Drainage ditches
  • Logging roads
  • Excavation or filling
  • Blasting
  • Examples of structures or activities prohibited within our right-of-way include but are not limited to the following:
  • Abandoned materials and debris
  • Barns
  • Basketball goals (in-ground)
  • Breezeways
  • Camping sites or campers
  • Concrete pads
  • Decks or porches
  • Decorative lights
  • Deer stands or blinds
  • Dumpsters, trash dumps or junk cars
  • Electrical boxes
  • Guy wires
  • Houses
  • Large shrubs
  • Mail boxes
  • Mobile homes
  • Outdoor grills or pits
  • Patios
  • Permanent dog and animal shelters
  • Picnic shelters
  • Playground equipment
  • Pole sheds
  • Ponds, pond dams
  • Recreational vehicle traffic
  • Roof overhangs
  • Satellite equipment or antennas
  • Septic tanks or drain fields
  • Set poles
  • Signs
  • Sprinkler heads
  • Stockpiled materials
  • Street lamps
  • Swimming pools
  • Tree farms (including Christmas tree farms)
  • Trees
  • Valves
  • Water retention/diversion devices/structures
  • Wells
  • Dominion Energy Carolina Gas Transmission encourages you to contact us at 800-789-7272 early in the planning process to discuss your proposal and determine what, if anything, may be required to work or place improvements near or across our pipelines.

    Pipeline Construction

    Before pipeline construction begins, land surveys are done to evaluate a variety of factors including environmental, cultural, land use and scenic resources. Once the best route is determined and easements are acquired from landowners, construction can begin.

    1. Pre-construction evaluation
      Dominion Energy Carolina Gas Transmission starts by evaluating environmental features along proposed pipeline segments. Utility lines and agricultural drainages are located and marked to prevent accidental damage during pipeline construction. Next, the pipeline’s centerline and the exterior right-of-way boundaries are staked.
    2. Clearing and grading
      We then clear the right of way of vegetation. We install temporary erosion controls prior to any earth-moving activities.
    3. Trenching
      Topsoil is removed from the work area and stockpiled separately in agricultural areas so that it can be reapplied after the trench has been backfilled. Dominion Energy Carolina Gas Transmission then uses backhoes to dig a pipeline trench. That soil is temporarily stockpiled on the non-working side of the trench until it is used to backfill the trench.
    4. Pipe stringing
      Individual pieces of pipe are placed along the right of way adjacent to the ditch and arranged so they are accessible to construction personnel. A mechanical pipe-bending machine bends the individual joints of pipe to allow for natural ground contours and when the route changes direction.
    5. Welding and coating pipe
      After the stringing and bending are complete, the pipe sections are aligned, welded together, and placed on temporary supports along the edge of the trench. All welds are then inspected visually and by x-ray. A coating is then placed on the welded joints. The entire pipeline coating is electronically inspected to locate and repair any coating faults or voids prior to placing the pipe in the ground.
    6. Lowering pipe and backfilling
      The pipe is lowered into the trench by side-boom tractors. The trench is backfilled using backfilling or bladed equipment; no foreign materials are permitted in the trench.
    7. Testing
      The pipeline is hydrostatically tested following federal regulations. Test water is obtained and disposed of in accordance with applicable federal, state and local regulations. The new pipe is pressure tested with water to 1.5x the pressure at which it will operate to ensure it is sound. Before the water is discharged, it is analyzed to make sure it is safe and then is discharged in a way to prevent erosion or impact to wetlands.
    8. Restoration
      Dominion Energy Carolina Gas Transmission’s policy is to clean up and restore the work area as soon as possible. After the pipeline is backfilled and tested, disturbed areas are restored as closely as possible to their original contours. Restoration measures are maintained until the area is restored as closely as possible to its original condition.

    Services

    The Southeast is growing, and so is the need for natural gas – the preferred fuel choice for businesses, residences, industries and power generation facilities across the U.S. It's abundant, domestic, relatively inexpensive and environmentally friendly.

    Dominion Energy Carolina Gas Transmission is a high-pressure, interstate natural gas pipeline company that transports natural gas on behalf of wholesale customers such as power generators, large industrials, local distribution companies, municipal gas authorities and energy marketers.

    The 1,500-mile pipeline system runs from southeast Georgia, throughout South Carolina and up to the border of North Carolina. Dominion Energy transports gas for end users in Georgia, South Carolina and North Carolina.

    What We Do and How We Do It

    Capacity

    Our pipelines provide the critical infrastructure link between end users and wholesale supply access. Customers contract with Dominion Energy to ensure pipeline capacity is available to transport their natural gas supply whenever it is needed, 365 days a year. Our team takes this obligation seriously and operates our pipeline system to ensure we are prepared to meet our firm obligations daily.

    Reliability

    Dominion Energy provides safe and reliable service to local distribution companies, municipalities, power generators and various industrial operations. Safety and reliability are our highest priorities as we operate our pipeline in an environmentally responsible manner. We have a well-trained and committed work force focused on operating and maintaining our pipeline system in a manner that meets or exceeds all applicable regulations required by federal, state and local entities.

    Supply Diversity

    Access to wholesale gas supply is another key way Dominion Energy Carolina Gas Transmission delivers value. In today’s natural gas marketplace, customers using large volumes of gas often want more control and flexibility in managing purchasing strategies. Dominion Energy provides access to diverse supply sources through its interconnections with the Transcontinental Gas, Southern Natural Gas and Elba Express pipelines, as well as the Southern LNG Importation Terminal located at Elba Island near Savannah, GA.

    Dominion Energy is uniquely positioned to enhance value for current and future customers with access to major supply sources, and providing customers with flexibility in both supply and deliverability. The natural gas supply picture continues to evolve with the addition of shale gas, which provides nonconventional supply sources in new geographic areas. The hub-like nature of Dominion Energy positions its customers to take advantage of these changing supply conditions to negotiate the best supply arrangement to meet their specific natural gas needs.

    Customer Support and Information

    Dominion Energy provides timely information through our Electronic Bulletin Board (EBB)

    Here, customers may access scheduled quantities, measurement data, invoices, operational notices and a variety of reports to help manage their natural gas usage. DCGT is committed to excellence in customer service and strives to meet with customers regularly to share information and identify customer needs.

    Each customer has a dedicated account manager to ensure their unique expectations are understood and met. Dominion Energy also meets with customers throughout the year as well as at our annual Shipper Meeting. We frequently include outside speakers who have information or insight that could be valuable to our customers, and we regularly post the presentation materials on the EBB.

    Why Work With Us

     

    Our Heritage 

    Dominion Energy Carolina Gas Transmission, LLC, was formed through the 2006 merger of SCG Pipeline (an interstate pipeline in Georgia and South Carolina) and South Carolina Pipeline Corporation (an intrastate pipeline which pioneered the expansion of safe, cost-effective natural gas service into much of South Carolina in the 1950s).

    Combining the strengths and resources of these two companies, Dominion Energy Carolina Gas Transmission transports reliable natural gas throughout the growing southeast region of the United States.

    On February 2, 2015, Dominion Energy Carolina Gas Transmission joined the Dominion Energy family of interstate natural gas pipeline companies. View the press release.

    Our Safety Commitment 

    At Dominion Energy Carolina Gas Transmission, we continue to follow stringent pipeline inspection processes to comply with federal mandates, including the Pipeline Safety, Regulatory Certainty and Job Creation Act of 2011.

    Learn more about our commitment to public safety.

    Contact Us

    To become a Dominion Energy Carolina Gas Transmission customer or for more information, call us at 866-401-5248.

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