Feds: Over-pressurized lines caused deadly gas explosions in Massachusetts
BOSTON — Over-pressurized natural gas lines were the source of deadly explosions and fires that rocked communities north of Boston last month, the National Transportation Safety Board said Thursday.
The preliminary report found that utility workers contracted by Columbia Gas had failed to account for critical pressure sensors as they replaced century-old cast-iron pipes in Lawrence on Sept. 13. That omission caused high-pressure gas to flood the neighborhood’s distribution system, triggering more than 80 explosions and fires across the city, as well as neighboring North Andover and Andover.
One person was killed and about 25 others were injured in the ensuring chaos.