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Washington Expansion

Washington Expansion

Fourth Quarter 2013Washington Expansion Project Overview

On June 25, 2013, Northwest Pipeline GP (“Northwest”) filed an application with the Federal Energy Regulatory Commission (“FERC”) requesting a Certificate of Public Convenience and Necessity authorizing Northwest to construct, own and operate the Washington Expansion Project in western Washington. The FERC docket number is CP13-507.

Northwest has been asked by Oregon LNG to transport an incremental 750,000 dekatherms per day of natural gas to an interconnect with Oregon Pipeline LLC’s proposed Oregon Pipeline near Woodland, Wash. To accomodate this request, Northwest plans to construct the Washington Expansion Project, which will require the installation of additional pipeline and compression facilities on the existing Northwest system in the state of Washington.

Click to view larger map.

Pipeline Facilities

The project consists of 140 miles of 36-inch diameter pipe to be constructed in ten different segments in or near Northwest’s existing right-of-way in the I-5 corridor between Sumas and Woodland. These segments vary in length from eight miles to over 35 miles. Below is the mileage breakout by county: 

County Miles Percentage
Cowlitz 35 25%
Lewis 26 19%
Thurston   8   6%
Pierce 14 10%
King 18 13%
Snohomish 15 11%
Skagit 13   9%
Whatcom 11   8%
Total 140 100%


Compressor Facilities

The project includes upgrades to Northwest’s existing Sumas, Mt. Vernon, Snohomish, Sumner and Chehalis compressor stations.

Project Benefits

Although this expansion of pipeline facilities in Washington is driven by a plan to use the gas outside of the state, there are many benefits this project brings to Washington and its citizens. These include increased infrastructure to the region to serve existing and potential new natural gas markets; additional natural gas transportation flexibility; increased tax revenue to the state and counties; and additional jobs during construction.

Regulatory Process

Interstate natural gas pipelines are regulated by the Federal Energy Regulatory Commission (FERC). As such, FERC requires pipeline operators to obtain a Certificate of Public Convenience and Necessity, in addition to various state and local permits, before any construction can begin.

Proposed Schedule

Customer Information

Oregon LNG proposes to build a liquefied natural gas (LNG) terminal near Warrenton, Oregon, where natural gas would be liquefied and transported by ships to Pacific Rim markets. An 86-mile pipeline, named “Oregon Pipeline,” is proposed by Oregon LNG to connect the LNG terminal to the Northwest Pipeline system at the Woodland, Washington interconnect site. More information can be found on Oregon LNG’s website: http://www.oregonlng.com/.

Contact Us

If you have any questions, feel free to contact us anytime.
Toll-free hotline: 888-892-8905
WashingtonExpansion@williams.com

Landowners may discuss the project with our land agents at the following land office:

Washington Expansion Project Land Office
15406 Meridian Avenue East, Suite 101
Puyallup, WA 98375
Tel: 253-864-4967

Open Houses

Thank you for attending the open houses the week of August 13-17 in Sedro Woolley, Snohomish, Auburn, Kelso and Chehalis.

Below is the open house presentation given by project manager Al Michini.

Open Houses Presentation Aug 2012.

Project Newsletter

August 2012

First Quarter 2013

Fourth Quarter 2013