In 1652 Francis Rockley leased land to Lionel Copley to build a blast furnace (Crossley 1995, 382). The location of the furnace is indicated by the place name Furnace Hill which is marked on a map thought to date to 1726 (copy in Crossley 1995, 383). By this time it is thought to have fallen out of use, probably in c.1721 (Umpleby 2000, 162). There is no survival of the furnace building or head race but the dam still holds water. The area is largely covered by trees and is marked as marshy ground which gives significant legibility of the former wet wood which was likely to have covered this stretch of the valley prior to the construction of the furnace.