 Construction of the railway started in 1833, from Salford. The company attempted to alter the route of the Bury branch, and also to extend it to Rawtenstall, but they did not receive Parliamentary approval for this. In July 1834 the committee of management applied to Parliament for "an act to amend the line of the railway between Manchester and Bolton". The amendment would take the railway along much the same course as that proposed by the Manchester to Preston Railway and was authorised by Parliament in 1835. Work proceeded so slowly that further clauses were added to the proposed act, including a continuation of the railway from Bolton, to Liverpool. Although this continuation was never built, the Liverpool and Bury Railway built such a connection in 1848. A line from Clifton to Bolton, authorised in 1835, did not materialise. The connection to Bury was never built, due mainly to the objections of the company's engineer, Jesse Hartley. The Bury branch would have required a 1,100-yard (1,000 m) tunnel on a gradient of 1 in 100, at the time a difficult and expensive proposition.
