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).
Pipelines We Regulate
Video
Pipeline News and Activities
Call Before You Dig
Washington Dig Law
Submit an underground utility damage report 
HERE
2020 CGA Best Practices Guide ver 17.0
2019 CGA Annual DIRT Report
2018 CGA Guide to Filling Out a DIRT Repor
2018 PAPA Excavation Safety Guide
National Safe Digging Month
Call Before You Dig Information
Request a Locate
APWA Marking Standards
Free Locate / Private Locate
Damage Prevention Enforcement Actions (by alpha)
Damage Prevention Enforcement Actions (by date)
Reports and Studies
Pipeline Siting in Washington
Citizens Committee on Pipeline Safety (CCOPS)