This is now the site of a modern business park with many of the businesses dealing with waste or recycling. In the 1970s the southern fringes of the polygon were used as refuse tips. The site is depicted as a steel rolling mill before the business park is constructed. This is a development of an early water powered site. A grinding wheel was described as 'newly erected' in 1686. The lease on this was taken by a Joseph Clay in 1769. This is how the lane derives its name. Clay's was a sizeable operation, at one time employing 56 men at 43 troughs. During the mid to late 19th century the site was occupied by Firths who used it as a rolling mill and forge. A film was made showing the firm of Tyzack's grinding scythes at the wheel in 1941. Legibility is fragmentary. The name of a previous owner persists in the road name. The weir and head goit are in the same position as shown in the late 18th century. Only a very small part of the millpond remains to the west of the buildings.