The Iron Bridge

The Iron Bridge stands across the Ironbridge Gorge where the River Severn cuts deep into Shropshire. Cast in 1781, it was the first large bridge made entirely of iron and became a model for later structures. The gorge itself was carved by Ice Age meltwater, exposing coal, iron ore and limestone that fuelled the early Industrial Revolution. Abraham Darby III supervised the ironwork while Thomas Farnolls Pritchard designed the single-span arch. The bridge’s ribs were lifted into place by timber cranes set in the riverbed. Its importance lies in proving iron could replace wood or stone for major works. The bridge used 384 tonnes of iron shaped into nearly 1,700 individual pieces, each cast separately to fit exactly. Pritchard’s decorative rings and ogee curves still adorn the structure, while Thomas Gregory at the foundry drew the detailed joints. A watercolour from 1779 shows the wooden scaffold and half-ribs being manoeuvred by boat from Darby’s foundry half a kilometre downstream. Visitors walk the 30-metre span and see the interlocking iron ribs that form a truss arch. The river below remains busy with boats passing through the original clearance. Nearby, the village of Ironbridge clusters around the gorge’s edge, its cottages and museums telling the story of ironmaking. The bridge itself is now a scheduled monument, its ironwork preserved after late-20th-century restorations. The gorge, the bridge and the town together form a World Heritage Site recognised for their role in industrial change.