Tarenni Colliery 1858, when the Primrose Colliery was owned by Morgan and Lewis, fumes of an engine boiler suffocated 14 men and boys, and 7 horses. According to HM Inspectorate of Mines and Quarries data, outside the Gwendraeth valley, Tarenni Colliery had the highest set of recorded incidents for coal damp and methane gas explosions. In total during its production lifetime, there were six outbursts in which three men lost their lives: one on 12 December 1914; two on 17 February 1941. On 1 November 1909, water from the abandoned Ynysgeinon pit caused the death of five miners at Tarenni No.2. On
Merrimack Valley gas explosions back the expected completion date to December 16. Replacement of gas mains was proceeding ahead of schedule, but some older houses were unable to accommodate newer appliances and required more work to upgrade them to current standards. Merrimack Valley gas explosions On September 13, 2018, excessive pressure in natural gas lines owned by Columbia Gas caused a series of explosions and fires occurred in as many as 40 homes, with over 80 individual fires, in the Merrimack Valley, Massachusetts towns of Lawrence, Andover, and North Andover. One person was killed and 30,000 were forced to evacuate their homes. According to