Pipeline Safety Stakeholder Communications

The report below provides details and incident history for the pipeline systems in the state of Washington.

The incidents reported below include: All Incidents reported to PHMSA, Significant Incidents and Serious Incidents for the most recent 10 years. Current Year To Date (YTD) data is also provided. Each year and selected column totals provide links to focused reports showing the causes of the corresponding incidents.

The data sources for this report are the PHMSA Flagged Incident Files (1) (2) (3) and several pipeline mileage data sources as described below.

• Hazardous Liquid - National Pipeline Mapping System (4)
• Gas Transmission - National Pipeline Mapping System (4)
• Gas Gathering - Calendar Year 2009 Annual Reports (5)
• Gas Distribution - Calendar Year 2009 Annual Reports (6)

All mileages are for the year 2009 and are approximate as some data sources may not contain a complete record of state pipeline mileage for the year 2009.

See State Significant Incident Detail Listing for more information about each Significant Incident in Washington

Where appropriate, the table columns can be sorted by clicking the corresponding column header.

Washington Pipeline Safety Regulatory Fact Sheet

More Pipeline Incidents and Mileage Reports are available.

Notes

1. The miles of gas distribution service lines (the connection between the distribution line and the end user) are not included in the Gas distribution mileage. The total number of such services is provided.
2. The costs for incidents prior to 2011 are presented in 2011 dollars. Cost of Gas lost is indexed via the Energy Information Administration, Natural Gas City Gate Prices. All other costs are adjusted via the Bureau of Economic Analysis, Government Printing Office inflation values.
3. For years 2002 and later, property damage is estimated as the sum of all public and private costs reported in the 30-day incident report. For years prior to 2002, accident report forms did not include a breakdown of public and private costs so property damage for these years is the reported total property damage field in the report.
4. Net Barrels Lost applies only to Liquid incidents and is the difference between Gross Barrels Spilled and Barrels Recovered.
5. Gas Distribution incidents where fire/explosion was the primary cause of failure, such as a house fire that subsequently resulted in - but was not caused by - a distribution line failure are excluded from 2004 onward. This exclusion has not been applied in years prior to 2004 due to difficulty in identifying these types of events with the older report formats.

Sources

1. PHMSA Hazardous Liquid Flagged Incidents File - April 30, 2012. Note: Incidents occurring up to 30 days prior the Incident File source date may not appear in these reports due to the 30-day reporting period allowed by PHMSA regulation.
2. PHMSA Gas Transmission Flagged Incidents File - April 30, 2012. Note: Incidents occurring up to 30 days prior the Incident File source date may not appear in these reports due to the 30-day reporting period allowed by PHMSA regulation.
3. PHMSA Gas Distribution Flagged Incidents File - April 30, 2012 . Note: Incidents occurring up to 30 days prior the Incident File source date may not appear in these reports due to the 30-day reporting period allowed by PHMSA regulation.
4. Pipeline transmission mileage reported as "in service" to National Pipeline Mapping System - October 14, 2010
5. Calendar year 2009 Gas Transmission Annual Report from pipeline operators. - March 31, 2011
6. Calendar year 2009 Gas Distribution Annual Report from pipeline operators. - March 31, 2011

See Pipeline Incidents and Mileage Reports for more pipeline safety reports.