Situated at Ringsend in Dublin the Poolbeg power station, colloquially known as The Poolbeg Stacks, is a power station owned and operated by the Electricity Supply Board of Ireland (ESB). There are two stations on the site, the older thermal station containing units 1, 2, and 3 and the combined cycle gas station containing units CG14, CG15 and ST16, which is located toward the eastern end of the site. The six units had a total installed capacity of 1020 MW. The thermal station, fired by either oil or gas, was closed in 2010 which reduced capacity by 461 MW. The landmark chimneys were listed as protected structures in 2014.