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
Pearse Street fire a farther hydrant. While they waited, two explosions were caused by the fire igniting cylinders of coal gas and oxygen stored at No.163 by a company which manufactured car batteries. This engulfed the three men and strengthened the blaze, which burned itself out the following morning. The bodies of the firemen were recovered that evening; they had died of carbon monoxide poisoning. A tribunal of inquiry was established by order of the Oireachtas, which criticised the fire brigade supervisors, the water company, and the battery company. The cause of the initial fire was not established; the inquiry ruled out arson