Dublin Port has begun a €2.5 million programme of repairs to the Great South Wall following storm damage.
The five-week works focus on rock armour displaced during December’s Storm Bram, described as the fifth strongest storm ever recorded on the Irish Sea.
Built between 1720 and 1795, the 5km wall shelters the shipping channel into Dublin Port. It supports the safe movement of vessels carrying €165 billion in trade and 1.7 million passengers each year.
Damage occurred near the roundhead at Poolbeg Lighthouse, where sections of protective rock were loosened and shifted during severe weather.
Replacement rock armour, sourced from Arklow, is being installed by contractor Murphy.
Beacon Of Resilience: Poolbeg Lighthouse marks the end of the Great South Wall as Dublin Port begins €2.5m repairs to storm-damaged rock armour protecting the historic breakwater.
A section of the wall, about 100 metres from Poolbeg Lighthouse, is temporarily closed to the public.
Cormac Kennedy, Head of Commercial at Dublin Port, said rising wave heights are increasing pressure on coastal defences.
“With increasing wave heights there has been an exponential increase in the power of these waves,” he said. “We need to move swiftly to remediate recent damage.”
He said the current works represent the first phase of a wider reinforcement programme planned over the coming years.
Port Engineer Eamon McElroy said regular laser scanning and 3D modelling had identified movement in the rock armour.
“As storms become more severe, we need to work quickly to protect this crucial piece of marine infrastructure,” he said.
The Great South Wall works alongside the North Bull Wall to prevent silting at the mouth of the River Liffey and maintain navigable depths for shipping.
Around 100,000 people visit the wall each year. During extreme weather, it is closed on safety grounds.
Dublin Port has advised visitors to follow signage and monitor its social media channels for updates during the works.
Dublin Port provides a live webcam from Poolbeg Lighthouse, offering real-time views across the bay which can be viewed here


















































