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The Pipeline and Hazardous Materials Safety Administration (PHMSA) was formerly the Office of Hazardous Materials Transportation and the Materials Transportation Bureau. Its mission is to promote the safe transportation of hazardous materials on roadways, railways, and through pipelines. It was established in 1975.
National Pipeline Mapping System Public Viewer
"The National Pipeline Mapping System (NPMS) Public Viewer enables the user to view NPMS pipeline, liquefied natural gas (LNG) plant and breakout tank data one county at a time, including attributes and pipeline operator contact information. The user can also view gas transmission and hazardous liquid pipeline accidents and incidents going back to 2002 for the entire US. "
The Government Documents Collection provides access to PHMSA regulations and guidance about pipelines and transport of hazardous materials. We also have Congressional reports, documents, and hearings about pipelines and hazardous materials.