Construction Process

Atlantic Sunrise construction

Construction of the Atlantic Sunrise project, which will increase access to cost-effective and abundant Pennsylvania-produced natural gas, is underway. Learn more about Atlantic Sunrise.

Atlantic Sunrise construction economic impact

The Atlantic Sunrise project’s construction will have sizable economic impacts for counties throughout Pennsylvania, including a total value-added impact of $859 million to the state’s economy. The project areas will see a $1.6 billion increase in economic activity as a result of construction.

Williams is making it easy for its contractors to purchase goods and services from local businesses, launching a new mobile app – known as WillShop Local – to connect construction personnel with local service providers.

Atlantic Sunrise construction overview

On Sept. 15, 2017, the Federal Energy Regulatory Commission (FERC) issued its notice to proceed for the Atlantic Sunrise pipeline expansion. With all necessary permits and construction releases in place, Williams began construction for the greenfield portion of the project in Pennsylvania in late September.

Construction began in spring 2016 on the mainline portion of the Atlantic Sunrise project designed to accommodate bidirectional flow on the existing Transco pipeline system. A portion of the capacity created by these mainline modifications was recently placed into service.

Williams has worked closely with permitting agencies to minimize environmental and community impacts, making modifications to more than half of the original pipeline route. In addition, Williams has worked with local stakeholders to provide an additional $2.5 million for conservation projects located within the project area.

Construction is anticipated to last approximately 10 months, weather permitting. The nearly $3 billion project, which is designed to increase natural gas deliveries by 1.7 billion cubic feet per day, is scheduled to be placed into full service in mid-2018.

During peak construction periods, the project is anticipated to directly employ approximately 2,300 people in 10 Pennsylvania counties.

Atlantic Sunrise construction process

Atlantic Sunrise Construction Process

All affected landowners are notified before construction begins on an affected parcel. If a landowner has questions or concerns, that landowner should contact Williams directly instead of reaching out to the construction contractor. Williams’ land agents are available during and after the construction process to ensure landowner questions and concerns are promptly addressed.

See how Atlantic Sunrise and affordable natural gas benefit Pennsylvania.

Download the Atlantic Sunrise Construction Fact Sheet

Atlantic Sunrise construction FAQs

Have a question that isn’t answered below? Check out our FAQs page.

FAQsOpen All

What kind of oversight will the project have?

The goals of construction from the time of mobilization will be to provide safe working conditions for all workers, while limiting the disturbance to the community. To that end, Williams has taken all necessary steps to ensure proper oversight in all construction areas, including safety and stop work authority. We have ensured all employees are appropriately trained in the following areas: environmental, safety, security and FERC compliance. Additionally, guiding documents have been or can be provided that detail and include all contracts, drawings, specifications, permits, landowner lines, operator qualifications and more.

What kind of inspections will be undertaken during construction?

Williams will have several hundred inspectors across the project — approximately 45-50 per construction spread, depending on size and scope — to perform inspections on the following aspects:

  • Utility: certifying the pipeline has no leaks or other safety issues
  • Ditching: making sure the pipeline is properly covered with the correct fill
  • Welding: evaluating and testing 100 percent of welds
  • Coatings: testing to ensure the pipeline can withstand high temperatures, chemicals and corrosion
  • AC mitigation: making sure there is a decreased induced voltage on the pipeline
  • Horizontal directional drills: guaranteeing the drills are used properly in accordance with operational standards

Additionally, inspectors will perform hydrostatic testing to determine and verify pipeline integrity.

What is the process for agricultural construction and monitoring?

Williams will have several hundred inspectors across the project — approximately 45-50 per construction spread, depending on size and scope — to perform inspections on the following aspects:

  • Pre-construction: A topsoil-depth survey was performed across all agricultural lands. Samples were obtained every 750 feet, with depths interpolated between points.
  • During construction: Williams will receive permission from landowners for trench crowning and planting cover crops for erosion prevention. Soil will be replaced according to Natural Resources Conservation Service specifications, and there will be dewatering limits to protect actively growing crops. Additionally, affected drainage will be repaired temporarily and then permanently. Rocks will be removed from topsoil, and we’ll make sure any removed topsoil is replaced.
  • Reclamation: Compaction relief will occur to ensure greater agricultural reclamation success. This will be completed before returning topsoil.

After reclamation is complete, Williams’ Environmental Inspection Team will conduct thorough inspections to ensure the land meets all local, state and federal guidelines. Get more information about agricultural construction.

What security precautions will be taken?
What is a spread?

A spread is essentially a segment of the construction area. We use the spread system because Atlantic Sunrise construction consists of nearly 200 miles, and this makes it easier to coordinate construction activities.

Pipeline construction will consist of eight construction spreads, six of which will be working concurrently in 10 Pennsylvania counties.

Each spread will have its own construction manager, contractors, subcontractors, community relations coordinator and more. Instead of those workers identifying themselves by just those titles, they can say which spread they are with, allowing our team to more easily address issues and track down information.

Pipeline installation will be completed by four primary construction contractors (Henkels & McCoy Inc., Latex Construction Co. Inc., Michels Corp. and Welded Construction).

Process Steps