The pipeline runs bidirectionally from Sumas, Washington, to La Plata County, Colorado.
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The Northwest Pipeline system is a primary artery for the transmission of natural gas to the Pacific Northwest and Intermountain Region. It began as a 1,500-mile pipeline and has since expanded into a 4,000-mile bi-directional transmission system crossing the states of Washington, Oregon, Idaho, Wyoming, Utah and Colorado. Northwest’s bi-directional system provides access to British Columbia, Alberta, Rocky Mountain and San Juan Basin gas supplies. There are several expansion projects currently planned, including into Mollala and Jordan Cove, Oregon, and Plymouth, Washington. [1] As of 2017, there is also a lateral expansion planned into Seattle, Washington. [5]
In Oregon, USA, TC Energy is working with the utility NW Natural to develop the Trail West Pipeline project, which would deliver more gas to the Portland area from a major existing pipeline in Central Oregon. The new 30-inch diameter gas pipeline is designed to transport 500 million cubic feet per day with an option to double that amount in the future. The industry believes that it could go into service by late 2023.[8]
The Kalama Lateral Project was proposed in 2016 to transport natural gas to a proposed Northwest Innovation Works methanol plant in Washington, United States.[14] FERC issued extensions to Northwest Pipeline Co in 2018 and 2019, and in April 2022 it granted a third extension to the required in-service date out to April 2022.
The project is considered cancelled as of April 2022.