Tags
Columbia Gas, Columbia Gas of Massachusetts, failure, gas explosions, major hazard management, Massachusetts, Merrimack Valley, natural gas, NTSB, pipeline failures, risk, risk management
Briefing 1 Link: http://youtu.be/cpcdGUK4i9c
Briefing 2 Link: http://youtu.be/gjhOGVdgia4
Note that he says that there was a 100 year old cast iron pipe connected to a new plastic pipe.
https://twitter.com/NTSB_Newsroom/status/1040716757684695041
