Stockport Metropolitan Borough Council (SMBC) is undertaking a scheme of improvement works to the current highway of Great Portwood Street, Stockport, including the construction of a cycle path and associated remediation and landscaping. This included the removal of the mainly-demolished remains of Warren Street Mill, and early-nineteenth century cotton spinning and weaving mill situated on the west bank of the River Goyt. The mill was established prior to 1824, and represented an early example of the use of powered looms within the region, prior to the boom in power loom weaving following the invention of the Roberts loom, patented in 1830. Although heavily truncated, the remains of the small building on the south-eastern corner of the former Warren Street mill retained fabric relating to several phases of a structure that was originally erected as a detached boiler house in the early nineteenth century. Warren Street Mill represented an early textile mill within Stockport, erected prior to 1824, and incorporating the very early application of power looms within the region. Machine-driven looms formed only a minor part of the weaving industry in Manchester in the early-nineteenth century, with only 14,650 powered looms in use by 1820 (Hills 1993, 177). This had risen significantly by the end of the decade to around 55,500 in 1829 (ibid), but the rapid explosion in the use of power looms did not begin until Richard Roberts developed and patented his more reliable power loom in 1830, with over 100,000 power looms in use in Manchester as early as 1833.