The Atlantic Sunrise pipeline is a $3bn expansion of Williams’ existing 16,415km long Transco natural gas pipeline system.

Supported by long-term shipper commitments, the Atlantic Sunrise project will boost the design capacity of the Transco pipeline by about 12% from the present capacity of 1.7 billion cubic feet per day to 15.8 billion cubic feet per day.

At the same time, the Atlantic Sunrise pipeline project will also further bolster and extend the bi-directional flow of the Transco system. It will enable direct connection of the gas sourced from Marcellus Shale in Pennsylvania to Mid-Atlantic markets, which includes the Cove Point LNG facility, and the Southeastern US, including Alabama.

Upon its full commissioning, the Atlantic Sunrise pipeline will start delivering enough natural gas that can meet the daily needs of more than seven million American homes.

Williams president and CEO Alan Armstrong said: “This project makes the largest-volume pipeline system in the country even larger, further executing on our strategy to connect premier natural gas supply areas with the best markets in the country.

“The project is significant for Pennsylvania and natural gas-consuming markets all along the East Coast, alleviating infrastructure bottlenecks and providing millions of consumers direct access to one of the most abundant, cost-effective natural gas supply sources in the country.”

Williams started construction on the greenfield segment of the Atlantic Sunrise natural gas pipeline project in Pennsylvania in September 2017. The pipeline expansion project saw installation of about 298km of new natural gas pipeline in addition to construction of two new compressor stations and modifications of compressor stations in five US states.

The greenfield portion of the Atlantic Sunrise pipeline, named as the Central Penn Line, is owned jointly by Transco and Meade Pipeline, which in turn, is owned by WGL Midstream, Cabot Oil and Gas and EIF Vega Midstream.

Overall, the Atlantic Sunrise project had supported close to 8,000 jobs, said Williams.