Going back to the beginning of Birmingham canals the Birmingham and Warwickshire Archaeological Society say…
“Birmingham, already a considerable manufacturing centre, must have felt keenly the evils resulting from bad roads and the want of some better means of transport than the slow and uncertain waggons and pack-horses in use at the time. On January 26th, I767, a meeting of the inhabitants was convened by the Constables, Churchwardens, and Overseers for the purpose of considering a scheme for cutting a canal from Birmingham through the South Staffordshire coalfield to communicate with the Staffordshire and Worcestershire Canal. The meeting unanimously decided to have a survey made, and Brindley was asked to undertake the work.
Brindley reported to a meeting held on the 4th June, 1767, and submitted alternative plans. The proposal adopted was one for a canal from a point near New Hall, over Birmingham Heath, by Smethwick, Oldbury, Tipton Green, and Bilston, to join the Staffordshire and Worcestershire Canal at Autherley, near Wolverhampton. There were to be two branches, one from Oldbury by Grits Green to Wednesbury Holloway, and the other from Toll End to Ocker Hill to communicate with the mines. A plan of this survey is preserved at the Canal Office.
The cost was originally estimated at £30,000, but an amended estimate of £50,000 was issued in July, and the actual cost of construction was about £70,000. Application was made to Parliament for the necessary powers and the Bill received the Royal Assent on the 26th July, 1768.”