A trickle of water flows down Barney Beck, or Old Gang Beck as it was known in the 19th century when the lead ming industry in Swaledale was at its peak. Then there would have been enough water to drive stone crushers housed in a small building which stood adjacent to the beck but long since demolished. Further away up the slope the remains of smelting mill still survives, a reminder of the industry. Here bouse, the lead ore, was fired to a high temperature to release the metal. Either coal, from the nearby Tan Hill colleries, or peat from the surrounding moors, was used to fire the four furnaces in the mill. The pigs or ingots of the pure lead were then transported by packhorse to sea going ships at Yarm and Stockton. A water supply would also have been required in the smelting mill to drive the bellows, carried by a wooden launder or chute from higher up the beck. The mill operated from 1839 to 1881 and replaced two earlier 17th century mills.