Washington Utilities and Transportation Commission
The commission is responsible for developing and enforcing safety standards for natural gas and hazardous liquid pipelines located within the state. The commission also inspects the portions of interstate natural gas and hazardous liquid pipelines located within Washington state; the standards and enforcement actions are the responsibility of the federal Pipeline and Hazardous Materials Safety Administration (PHMSA).
List of Pipelines We Inspect
Pipelines by County
Inspection Reports by Company
Pipeline Failure Investigation Reports
Enforcement Actions
Pipeline Maps
Washington Pipeline Incidents
Third-Party Excavation Damage
PHMSA Facts - Pipeline Inspection
Pipelines Informational Video
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Washington Dig Law
2017 CGA Best Practices Guide 14.0
2017 PAPA Excavation Safety Guide
National Safe Digging Month
Call Before You Dig Information
Request a Locate
Free Locate / Private Locate
Excavation Damage Data
Damage Prevention Enforcement Actions
2016 CGA Annual DIRT Report
Land Use Report
2004 Public Awareness Project
Intrastate Facilities
Interstate Gas Facilities
Small Facilities