Dolaucothi Gold Mines

The Dolaucothi Gold Mines lie in the valley of the River Cothi near Pumsaint in Carmarthenshire. The site includes ancient Roman surface and underground workings on the Dolaucothi Estate, owned by the National Trust. These are the only known Roman gold mines in Britain and a Scheduled Ancient Monument. Gold extraction may have begun in the Bronze Age by washing river gravels. The Romans later developed advanced mining methods here under Governor Sextus Julius Frontinus, who established a fort at Pumsaint around AD 78. The mines show how the Romans used water power to find and extract gold. They built long aqueducts, some reaching seven kilometres, to carry water from the River Cothi and nearby streams. Tanks held water that was suddenly released to wash away soil and reveal gold veins in a method called hushing. Pliny the Elder described this technique in his Naturalis historia. Archaeologists have found Roman pottery and gold ornaments from the site, now in the British Museum. Visitors walk past large opencast pits carved into the hillsides above Pumsaint. Remains of aqueducts and water tanks still stand along the ridges. The largest tank sits above a deep opencast where crushed ore was washed to collect gold dust. Nearby, the Carreg Pumsaint marks a mound of mining waste. A pool called Melin-y-Milwyr, or the soldiers’ mill, may have been used for washing ore or powered by watermills. Deep workings once used sequences of waterwheels to drain the mines, with fragments found during later mining.