Users of the Trent and Mersey Canal, the Loughborough Canal and the Erewash Canal next demanded major improvements to the river down to Gainsborough, including new cuts, locks, dredging and a towing path suitable for horses. The Dadfords, who were engineers on the Trent and Mersey Canal, estimated the cost at £20,000, but the proposal was opposed by landowners and merchants on the river, while the "Navigator", published in 1788, estimated that around 500 men who were employed to bow-haul boats would have lost their jobs. Agreement could not be reached, and so William Jessop was asked to re-assess the situation. He suggested that dredging, deepening, and restricting the width of the channel could make significant improvements to the navigable depth, although cuts would be required at Wilford, Nottingham bridge and Holme. This proposal formed the basis for an Act of Parliament obtained in 1783, which also allowed a horse towing path to be built. The work was completed by September 1787, and dividends of 5 per cent were paid on the capital during 1786 and 1787, increasing to 7 per cent, the maximum allowed by the Act, after that. Jessop carried out a survey for a side cut and lock at Sawley in 1789, and it was built by 1793.