Washington Utilities and Transportation Commission
Each year, the commission pipeline safety program spends approximately 700 days in the field inspecting pipeline facilities and operating procedures. On average, the program conducts 300 annual inspections, including 250 unannounced inspections of pipeline construction, repair and maintenance. Below you will find links to a list of documents associated with those inspections, as well as incident investigations and other pipeline activities.
The commission does economic and safety regulation of the four investor-owned local natural gas companies. The list provided below represents a history of pipeline inspections conducted for these companies since 2007.
Avista Utilities Corp.
Cascade Natural Gas Corp.
Northwest Natural Gas
Puget Sound Energy
The following companies are primarily regulated by the commission for safety purposes. Therefore, the view you will see when you click on the company name is the view of all dockets associated with that company. They might not be listed in chronological order. The first number in the line is the six-digit docket number. The first two number of the docket number represents the year the inspection activity began (e.g. 070001 started in 2007). In some cases, there will not be any documents available on-line for a given docket. Please contact us if you have any questions.
AIRGAS Merchant Gas Kalama (formerly Air Liquide Industrial U.S. LP)
AkzoNobel Pulp and Performance Chemicals, Inc. (now Nouryon Pulp and Performance Chemicals - see below)
AltaGas Facilities (US) Inc. (Petrogas eff. June 2017)
BP Pipelines North America (Cherry Point) (Operated by BP Pipelines North America)
City of Buckley
City of Ellensburg
City of Enumclaw
Exxon Mobil Corporation
Ferndale Pipeline System (Operated by BP Pipelines North America)
Gas Transmission Northwest LLC
Georgia-Pacific Consumer Products (Camas) LLC
Inland Empire Paper Co.
J.R. Simplot Company
McChord Pipeline Company
Nippon Dynawave Packaging Co., LLC (formerly Weyerhaeuser)
Northwest Pipeline LLC
Nouryon Pulp and Performance Chemicals LLC ( formerly AkzoNobel Pulp and Performance Chemicals, Inc.)
NuStar Pipeline Operating Partnership, L.P.
Olympic Pipe Line Company (Operated by BP Pipelines North America)
Petrogas (formerly AltaGas)
Phillips 66 Pipeline LLC
Solvay Chemicals, Inc.
Swissport Fueling, Inc. (SeaTac Fuel Facilities, LLC)
Targa Sound Terminal LLC
Tesoro Logistics Northwest Pipeline LLC
The New Roche Harbor Resort
Trans Mountain Pipeline (Puget Sound) LLC
Weyerhaeuser Company (now Nippon Dynawave Packaging Co., LLC - see above)
Williams Partners Operating LLC
For more information concerning interstate inspections and enforcement, please go to https://www.phmsa.dot.gov/pipeline/enforcement/enforcement-overview.