The Somerset Coal Canal (originally known as the Somersetshire Coal Canal) was a narrow canal in England, built around 1800 from basins at Paulton and Timsbury via Camerton, two aqueducts at Dunkerton, a tunnel at Combe Hay, Midford and Monkton Combe to Limpley Stoke where it joined the Kennet and Avon Canal. This gave access from the Somerset coalfield, which at its peak contained 80 collieries, to London. The longest arm was 10.6 miles (17 km) long with 23 locks.