Sewage plant first mapped in 1906. This was built on the former crofting fields associated with the Rob Royd Bleachworks (HSY6883) which has been split from this site with the construction of the M1. The land was used to spread the linen out after washing (Taylor 1993). The bleachworks was replaced by a small colliery in 1897 (Gill 2007b). Shortly after this the sewage works was built. There is partial legibility of the former bleach green and the earlier assarts as most of the land retains its agricultural use with the sewage works affecting a small area.