Pipeline and Hazardous Materials Safety Administration
The Pipeline and Hazardous Materials Safety Administration ( PHMSA ) is a United States Department of Transportation agency created in 2004 , responsible for developing and enforcing regulations for the safe , reliable , and environmentally sound operation of the US's 2 . 6 million mile pipeline transportation . 
<triplet> Pipeline and Hazardous Materials Safety Administration <subj> United States Department of Transportation <obj> parent organization <subj> 2004 <obj> inception