Interior of Otterburn Mill. Photo by Harry Rowland, 1969.

Otterburn Mill is a traditional tweed mill. It dates to the 18th century and was extended in 1821 and in about 1930. Many features survive to show the processes involved in making tweed. They include a late 19th century turbine that replaced the water wheels, much 19th century gearing, a waulk, or fulling, hammer, and, underneath the floor of the dye house are two brick furnaces. Outside the buildings, the dam and leat that powered the waterwheels survive, as well as a tenter field and tentering frames. This is a Grade II Listed Building protected by law.