Name and Location
Atlantic Sunrise pipeline project, US.

Client
Transcontinental Gas Pipe Line Company (Transco), a subsidiary of Williams.

Project Description
The project aims to expand Transco’s existing pipeline system from the Marcellus shale production area, in northern Pennsylvania, to deliver an incremental 1.7-million dekatherms a day of year-round firm transportation capacity to its existing south-eastern market areas.

The proposed project includes about 317 km of pipeline comprising:
• 296 km of new 76-cm- and 107-cm-diameter greenfield natural gas;
• a pipeline known as Central Penn Line (CPL) North and CPL South, in Pennsylvania;
• 19 km of new 91- and 107-cm-diameter pipeline looping known as the Chapman and Unity loops, in Pennsylvania;
• 4 km of 76-cm-diameter replacements in Virginia; and
• associated equipment and facilities.

The project’s above-ground facilities will include:
• two new compressor stations in Pennsylvania;
• additional compression and related modifications to three existing compressor stations, in Pennsylvania and Maryland;
• two new meter stations and three new regulator stations in Pennsylvania; and
• minor modifications at existing above-ground facilities at various locations in Pennsylvania, Virginia, North and South Carolina to allow for bidirectional flow, and the installation of supplemental odorisation, odour detection, and/or odour masking/deodorisation equipment.

Value
Not stated.

Duration
Transco expects to start construction as soon as possible. Construction will be undertaken over one year, with an estimated in-service date of February or March 2018.

Latest Developments
The Federal Energy Regulatory Commission (Ferc) has determined that construc-tion and operation of the project will result in some adverse environmental impacts, but impacts will be reduced to less than significant levels with the implementation of Transco’s proposed and Ferc-recommended mitigation measures.

Key Contracts and Suppliers
None stated.

On Budget and on Time?
Not stated.

Contact Details for Project Information
Transco, email AtlanticSunrise@williams.com.