Gas was found under the seabed south of Kinsale in the 1970s, and the question was where to burn it. Aghada answered that question. A village on the quiet eastern shore of Cork Harbour, opposite the urban bustle of Cobh, suddenly hosted the country's newest power station - a piece of industrial architecture sized to consume an offshore gas field. The plant came online in 1980, fed by pipeline from the Kinsale Head field, and ran on that gas for forty years. In 2020 the Kinsale field finally ran dry. The station did not. It now draws gas from Ireland's national gas network and continues, four decades after it was first turned on, to keep a substantial share of the Republic's electricity flowing.
The choice of site mattered. A gas-fired plant wants three things at once: cheap gas, lots of cooling water, and a connection to the national grid. Aghada has all three. The Kinsale Head pipeline made landfall on the south Cork coast and could be extended easily to the harbour edge. Cork Harbour itself - one of the largest natural harbours in the world - provided the cooling water. And the ESB Group, the state electricity company, already had high-voltage transmission lines into the Cork region. The village paid the price of becoming the kind of place where a power station was the loudest neighbour. The benefits, in jobs and rates and reliable industrial work, were real.
The original Aghada station was a conventional steam turbine plus three open-cycle gas turbines: a fairly standard 1980s setup. In May 2010 the then-Minister for Foreign Affairs, Micheál Martin, cut the ribbon on something newer - a combined cycle gas turbine, or CCGT, that effectively doubled the station's output. CCGT plants capture the heat that would otherwise vent to atmosphere from the gas turbine, use it to make steam, and pass that steam through a second turbine: more electricity from the same fuel. Aghada became one of the largest and most efficient power stations in Ireland, capable of supplying around 450,000 homes. The European Investment Bank had helped finance the upgrade as part of a continental shift toward cleaner-burning gas plants and away from older, dirtier coal.
Aghada still keeps diesel oil on site as an alternative fuel, a relic of the security-of-supply thinking that runs through European energy planning. The intention is not that the diesel turbines run often. It is that, if the gas supply is interrupted for any reason - geopolitical, technical, market - the plant can still spin up and meet demand. In a country whose electricity grid leans hard on intermittent renewables, the role of a flexible gas plant has grown rather than shrunk. In September 2022 the ESB filed a planning application for a new open-cycle gas turbine on the existing site, intended to provide additional backup capacity. The future of Aghada, in other words, is more gas turbines for longer.
Stand on the embankment near the plant and the view is industrial, but the eastern shore of Cork Harbour is also a Special Protection Area for birds. Shelduck, redshank, lapwing, dunlin, oystercatcher - the mud flats nearby host migratory and resident species in numbers significant on the European scale. The warm-water discharge from the cooling system creates a local microclimate that some species use. Whether that is a net positive or a net distortion is one of the small environmental arguments that surrounds every coastal generating station. The station, the village, and the birds occupy the same patch of estuary, each more or less aware of the others.
Located at 51.835°N, 8.236°W on the eastern shore of Cork Harbour, opposite Cobh and a few kilometres south of Midleton. The nearest airport is Cork (EICK), about 25 km west. From altitude the plant appears as a cluster of tall stacks and turbine halls along the water, with the long curve of Cork Harbour wrapping around it and the town of Cobh visible across the water to the west. The Kinsale Head gas field, now depleted, lay roughly 50 km south of here in the Celtic Sea.