Pipeline Damage Prevention - One Call
California One Call
http://www.digalert.org/index.asp

Common Ground Alliance
http://www.commongroundalliance.com/

Pipeline Safety Advocacy Groups
Pipeline Safety Trust
http://www.pstrust.org

Government Agencies
U.S. Dept. or Transportation's Office of Pipeline Safety (OPS)
Main Home Page - http://www.phmsa.dot.gov/pipeline
User Friendly Starting Point - http://primis.phmsa.dot.gov/comm/

Federal Energy Regulatory Commission (FERC)
http://www.ferc.gov/industries/gas.asp

U.S. Environmental Protection Agency (EPA)
http://www.epa.gov/region10/

National Transportation Safety Board
http://www.ntsb.gov/Surface/pipeline/pipeline.htm

Industry Organizations
Association of Oil Pipe Lines
http://www.aopl.org/go/site/888/

American Petroleum Institute
http://api-ec.api.org/

Interstate Natural Gas Association of America
http://www.ingaa.org/

American Gas Association
http://www.aga.org/

American Public Gas Association
http://www.apga.org/