NTSB Briefings 1 & 2 About The Columbia Natural Gas Pipeline Explosion In Massachusetts

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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

Among issues being examined in NTSB investigation are design of pipeline system, any upgrades made to the system, and the operator’s management of the pipeline.

— NTSB_Newsroom (@NTSB_Newsroom) September 14, 2018