The Leeds and Liverpool Canal
The original survey for the Leeds and Liverpool Canal was not performed by Brindley and proved to be impracticable. Therefore in July 1768 Brindley carried out a survey of the canal and the act of Parliament was obtained in July 1769. Brindley was offered the post of engineer but he declined because he had so much other work.
Robert Whitworth and his brother started the construction of the 127 miles long canal but they didn't live to see its completion in 1816, (neither did Brindley who died in 1772).