The boom stretched here in 1689 -- a chain of timber barricades thrown across the River Foyle by the army of King James II, designed to starve the defenders of Derry into submission during the longest siege in British and Irish history. Nearly three centuries later, engineers chose the same narrows at Madam's Bank for a very different kind of crossing. The Foyle Bridge, opened in October 1984, carries the A515 across the river on the longest bridge span on the island of Ireland: 234 metres of steel suspended 30 metres above the water, linking the city centre to the Waterside district on the east bank.
The bridge was four years in the making, built between 1980 and 1984 during some of the most turbulent years of the Troubles. Construction was contracted to RDL-John Graham of Dromore, with engineering by Ove Arup and Partners. The three main river spans were fabricated from steel box sections at Harland and Wolff's shipyard in Belfast -- the same yard that built the Titanic. Each of the six segments weighed up to 900 tonnes. They were transported by barge and ocean-going tug up the coast and around to the Foyle, then lifted into position over the river. The seven approach spans on the east bank used pre-stressed concrete box construction. The total cost of the four-year project was just under sixteen million pounds.
Before the Foyle Bridge, crossing the river in Derry meant the Craigavon Bridge, a double-deck road and rail bridge near the city centre that had carried traffic since 1933. The new bridge, built to four-lane dual carriageway standard, transformed movement around the city. By 2004, more than 30,000 vehicles crossed it daily. Between 2003 and 2005, the bridge underwent a major refurbishment -- strengthening, resurfacing, and structural improvements at a cost of ten and a half million pounds -- that caused widespread traffic disruption and reminded the city how much it depended on this single crossing. A third link, the Peace Bridge pedestrian walkway, opened in 2011, but the Foyle Bridge remains the primary arterial route.
Spanning a wide river estuary exposed to Atlantic weather systems, the Foyle Bridge sits in one of the windiest corridors in Northern Ireland. A sophisticated bridge management system, installed at a cost of eight hundred thousand pounds, monitors conditions in real time. At 30 mph winds, variable message signs display advisory speed limits. At 40 mph, high-sided vehicles are redirected to the Craigavon Bridge. At 50 mph, the bridge closes entirely. The system receives data automatically from wind monitoring equipment mounted on the bridge structure and posts warnings at strategic points around the city, including on roads approaching from the Republic of Ireland. For a city divided by its river, closing the bridge means isolating half the population.
Derry has always been defined by its river. The Foyle runs north through the city toward Lough Foyle and the open Atlantic, and every era has found its own way across. The Jacobite boom of 1689 was an act of war. The Craigavon Bridge was an act of pragmatism. The Foyle Bridge was an act of engineering ambition, built during a period when ambition of any kind in Northern Ireland required a particular kind of nerve. The Peace Bridge, opened decades later, was an act of symbolism -- a footbridge connecting communities on either side of the water. Together, the three crossings form a layered history of a city that has been besieged, divided, and slowly reconnected, all at the same narrow point where the river bends north toward the sea.
Located at 55.02N, 7.29W, crossing the River Foyle in Derry/Londonderry, Northern Ireland. The bridge is clearly visible from altitude as a long span connecting the city centre (west bank) to the Waterside (east bank). City of Derry Airport (EGAE) is approximately 10 km northeast. The three bridges -- Craigavon, Foyle, and Peace Bridge -- are all visible in sequence along the river. The River Foyle widens rapidly north of the bridge toward Lough Foyle.