The idea of connecting Dublin to the Shannon was proposed as early as 1715, but development was not initiated until 1751, when the Board of Inland Navigation was formed by an act of Parliament,
25 Geo. 2. In 1757, the Irish Parliament granted
Thomas Omer £20,000 to start construction of a canal. By 1759 he reported that in the
Bog of Allen and of canal from the
River Liffey near
Sallins towards Dublin were complete. By 1763 he had completed three locks and six bridges towards Dublin and was concentrating on establishing a water supply from the
Morell River near Sallins. At this point, the
Corporation of Dublin realised that the canal could be used to improve the water supply to the city via the
city basin, and put up the money to complete the canal into the city. But when the canal was filled, the banks gave way and the city did not obtain its water. By 1768, £77,000 had been spent on the project and little more was forthcoming.
Grand Canal Company In 1772, the Grand Canal Company was established by a group of noblemen and merchants, including public subscription, to ensure the future of the canal and to tackle the biggest barrier to its construction, the
Bog of Allen. This was a new venture for canals. The company invited
John Smeaton and his assistant
William Jessop to Ireland for two weeks to advise them. Smeaton made a recommendation to skirt round the bog but to build the canal at the full height, in contrast to Omer's efforts which attempted to drain parts of the bog and build at a lower level. This was to prove an expensive mistake, although he also advised reducing the generous locks that Omer had built (42m by 6 m / 137 ft by 20 ft) to 18m by 4m (60 ft by 14 ft), which would bring about considerable savings in the total cost of the canal. The canal from Sallins was finally opened to traffic in 1779 and a twice-weekly passenger service from Sallins to Dublin started in 1780. The canal was extended to
Robertstown in 1784, including the Leinster Aqueduct across the Liffey, constructed by
Richard Evans, and to a junction with the River Barrow at Athy by 1791. Samuel Watson's ''"The Gentleman's and Citizen's Almanack"'' for the year 1792, included a list of the passage boats available to the public on the Grand Canal departing from the
Canal Harbour at
James's Street. Stage coaches linking the cities of
Limerick and
Kilkenny with canal boats at
Monasterevin were also advertised. and it was some years before it began to make a profit, although regular dividends had been paid to shareholders. Trade increased from 100,000 tons in 1800 to double that in 1810. Revenues from passenger boats also increased to £90,000 by that date. (The novel ''The Kellys and the O'Kellys'' (1848) by
Anthony Trollope includes a description of a tedious journey by passenger flyboat from Portobello to Ballinasloe.) But the long saga had prompted a rival venture, the
Royal Canal, which started construction in 1790 and was finally opened in 1817 after the government had stepped in to resolve disputes between the two companies. The first steamer to traverse the canal from Dublin to Limerick was the Shannon Steam Navigation Company's wood paddle steamer
Mountaineer, which received the Canal Company's permission to proceed in October 1826. The second was the Dublin and Wexford Steam Company's iron paddle steamer , which arrived in Limerick on 2 February 1827. Apart from the breaches during construction, there were breaches on a branch of the canal in 1833, due to which one child drowned, and another in 1846. In 1855 the main canal breached at the same location as in 1797. In 1916 again 300 yards of the canal were displaced. The last breach was on 15 January 1989, between the Blundell Aqueduct and Downshire bridge. 18 miles of canal drained into the surroundings. In the 1960s, Dublin Corporation had plans to drain the canal and replace it with a 6-lane dual-carriageway as part of a plan to drain and lay new sewage pipes along the canal bed. The plans were met with opposition and a petition of 100,000 signatures against the proposal, and eventually abandoned. ==Route==