Williams Partners said that Northwest Pipeline GP has won the authorization from the Federal Energy Regulatory Commission (FERC) to place its 30-inch diameter natural gas mainline loop, the Sundance Trail Expansion into service.

The Sundance Trail $56m project consists of approximately 15.5 miles of pipeline and related facilities that will provide 150,000 dekatherms per day of firm transportation capacity from the Greasewood and Meeker/White River hubs in Rio Blanco County, Colorado to the Opal Hub area in Lincoln County, Wyoming.

As part of the project, Northwest replaced and added compression at its Vernal Compressor Station in Uintah County, Utah.

Northwest filed an application with the FERC for a certificate for the project in May 2009 and received FERC approval in December 2009. Construction on the project began in April 2010.

Northwest’s mainline is connected to the Piceance Basin at the Greasewood Hub through its Piceance Lateral and the Meeker/White River hubs through Northwest’s Colorado Hub Connection pipeline and related facilities.

Williams owns 77% of Williams Partners, including the general-partner interest.

Most of Williams’ interstate gas pipeline and midstream assets are held through its ownership interest in Williams Partners.