A View of Tanfield Arch in the County of Durham.
A picturesque view of the Causey Arch, a single-arched bridge built for a horse-drawn railway for transporting coal from Tanfield Coal works to the River Tyne. Built 1725-6 by stonemason Ralph Wood, it was the longest single-span bridge in the country with an arch span of 31 metres (102 ft), a record it held until 1756. Over 900 horse-drawn wagons crossed each day. In the 19th century, the wooden track was replaced with metal rails, and horses were replaced by stationary steam winding engines. The line closed in 1962 but the arch was restored in the 1980s for public use.