Former water powered sites of Upper and Nether Slack Steel Works, River Loxley. 'From Date' reflects approximate date that this site was cleared. Site currently vacant. The earliest reference quoted in Crossley et al (1989) for water power on these sites gives 1 wheel at 1581 and two at 1637. It is not possible to distinguish 2 sites from the historical record until 1794. 20th century mapping of the complex shows a steady advancement of later buildings as water power goes out of use. The main dam between the two mills has been built over by 1925. These mills were engaged in grinding, tilting and wire rolling. Only the weir that fed these mills is immediately legible.