Winter 2017-18 Construction Updates

With required federal and state permits in place, construction on the nearly $3 billion Atlantic Sunrise project began in September 2017 and is expected to last approximately 10 months. The project is scheduled to be placed into full service in mid-2018. Follow along to find out the latest on construction.

Construction on Atlantic Sunrise officially began in late September and is fully underway in eight Pennsylvania counties. Through December, overall construction is nearing 20 percent completion. Atlantic Sunrise remains on track to be placed into service by mid-2018.

Work on Atlantic Sunrise compressor stations — facilities that compress natural gas to a specified pressure in order to keep it flowing — is really taking shape in Wyoming and Columbia counties. Crews have mobilized equipment and materials onto the compressor station sites, and have worked on excavation, clearing and foundation work. 

Meter and regulator stations, which are used to measure the gas flow, are also under construction in Susquehanna, Luzerne, Wyoming and Columbia counties. The majority of work at these sites has included clearing operations and excavation activities. Crews have also installed erosion and sediment control devices at these sites.  

Horizontal Directional Drilling 

Horizontal directional drilling (HDD) is a trenchless crossing method used when conventional trenching or excavation is not practical, such as when crossing bodies of water. HDD works by making a pilot bore into the ground at an angle, then leveling out at a specified depth. Once the proper depth is reached, the bore is advanced horizontally to a destination point, where the drill is redirected to allow it to exit the ground. Williams will be using HDD at locations in Luzerne, Wyoming, Lancaster and Columbia counties, where traditional trenching or excavation is not practical, to allow the pipeline to navigate eight waterbody crossings, including the Conestoga and Susquehanna rivers. Forms of horizontal directional drilling technology have been used since the 1970s to safely install pipelines carrying oil, natural gas, petrochemicals, water, sewer and other infrastructure, and have by Williams and its contractors on successfully completed projects throughout the nation.