NTSB Preliminary Report

The NTSB is continuing its investigation into the September 13th pipeline explosions and fires in Merrimack Valley, MA. The over-pressurization of a low-pressure natural gas distribution system damaged 131 structures and killed one person. Today, the Board released a preliminary report, located here. This is a factual report, any analysis, findings, recommendations, or probable cause determinations related to this incident will be issued by the Board at a later date.