The lack of any direct canal link between the Mersey and Irwell Navigation (M&IN) and the Rochdale Canal meant that goods being transported using both waterways had to be offloaded onto carts and carried across the city, before being loaded back onto boats to continue their journey.
 This was costly and time-consuming, as well as adding to traffic congestion on the streets of Manchester.

In 1799 the nearby Manchester Bolton & Bury Canal company (MB&B) proposed to connect their canal to the Rochdale canal with an aqueduct across the M&IN.
 Due mainly to strong objections from the M&IN, who would have suffered a loss of trade, the link was not forthcoming.
 In 1805, John Nightingale was asked by the Mersey and Irwell Navigation Company to estimate the cost of a canal link between Manchester and Salford.
Nothing would happen until 1836, when John Gilbert was appointed as engineer.

The Bridgewater Canal Company sensing potential loss of trade cut the short Hulme Locks Branch Canal connecting their canal to the River Irwell.
The following year the M&IN completed the Manchester and Salford Junction Canal.
 This provided an alternative route from the Rochdale Canal to the River Irwell, and cargoes from either direction could navigate onto the Irwell using the junction canal or Hulme Locks.
The lack of any direct canal link between the Mersey and Irwell Navigation (M&IN) and the Rochdale Canal meant that goods being transported using both waterways had to be offloaded onto carts and carried across the city, before being loaded back onto boats to continue their journey.  This was costly and time-consuming, as well as adding to traffic congestion on the streets of Manchester.
In 1799 the nearby Manchester Bolton & Bury Canal company (MB&B) proposed to connect their canal to the Rochdale canal with an aqueduct across the M&IN.  Due mainly to strong objections from the M&IN, who would have suffered a loss of trade, the link was not forthcoming.  In 1805, John Nightingale was asked by the Mersey and Irwell Navigation Company to estimate the cost of a canal link between Manchester and Salford. Nothing would happen until 1836, when John Gilbert was appointed as engineer. 
The Bridgewater Canal Company sensing potential loss of trade cut the short Hulme Locks Branch Canal connecting their canal to the River Irwell. The following year the M&IN completed the Manchester and Salford Junction Canal.  This provided an alternative route from the Rochdale Canal to the River Irwell, and cargoes from either direction could navigate onto the Irwell using the junction canal or Hulme Locks.
Hulme Locks Branch Canal