This area of the Blackburn Valley was described by Miller writing in 1936 as "a wide stretch of meadow land, over which the factories are gradually spreading" (Miller 1949, 99). Indeed the factories first depicted on the 1938 OS 25 inch mapping are by 1952 plans SK3892NW and 3893SW approaching total coverage with the Blackburn Brook confined to an artificial channel to the south west of the age shed type steel mills and works. Invisible legibility of earlier landscapes in this large scale steel complex. This polygon records the location of the weir, head goit, dam and mill of the Blackburn Wheel, the earliest reference for which Miller gives is 1794 when the works contained 10 grinding "throws" under Jonathan Walker. By 1825 15 fork makers are listed at Blackburn. The mill continued to operate as a cutlery wheel until around 1880 after which it was converted into a mill for the grinding of charcoal (from the nearby Woolley Wood) to produce foundry blacking. The mill closed in 1909. (All chronological information from Miller 1949 pp 99-100) There is no legibility of any of this complex above ground all associated watercourses, buildings and earthworks having been levelled for the construction of industrial buildings in the early-mid twentieth century. Archaeological survival as yet untested.