Grand Canal (Ireland) - History

History

The idea of connecting Dublin to the Shannon was proposed as early as 1715, and in 1757 the Irish Parliament granted Thomas Omer £20,000 to start construction of a canal. By 1759 he reported that 3 km (1.9 mi) in the Bog of Allen and 13 km (8.1 mi) of canal from the River Liffey near Sallins towards Dublin were complete. By 1763 he had completed 3 locks and 6 bridges towards Dublin and was concentrating on establishing a water supply from the River Morrell near Sallins. At this point the Corporation of Dublin realised that the canal could be used to improve the water supply to the city, 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 didn't obtain its water. By 1768, £77,000 had been spent on the project and little more was forthcoming.

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 the canal, 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. The circular line through Dublin from Portobello to Ringsend, where large docks adjacent to the Liffey were constructed, was started in 1790 and opened in 1796. The company had by then turned its attention to completing the link with the Shannon. Getting across the Bog of Allen took more than five years of struggle under the guidance of Jessop, who attempted to use walls of clay to support the walls of the canal. Though the canal was opened to Daingean (then Philipstown) in 1797, serious breaches occurred and Jessop was forced to abandon this method. The continuation to the Shannon then continued under the leadership of John Killaly, who succeeded in crossing another bog by carrying out drainage works for several years before construction. The work was substantially completed in 1803, but because of leakages and a dry summer the official opening had to be delayed until April 1804.

The whole work had cost in the region of £877,000 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. 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.