
The Great Southern & Western Railway (GS&WR) line between Dublin and Carlow opens on August 4, 1846.
The GS&WR is an Irish gauge (1,600 mm (5 ft. 3 in.)) railway company that operates in Ireland from 1844 until 1924. The GS&WR grows by building lines and making a series of takeovers, until in the late 19th and early 20th centuries it is the largest of Ireland’s “Big Four” railway networks. At its peak the GS&WR has an 1,100-mile (1,800 km) network, of which 240 miles (390 km) are double track.
The core of the GS&WR is the Dublin Kingsbridge – Cork main line, Ireland’s “Premier Line,” and still one of her most important main line railways. The company’s headquarters are at Kingsbridge station. At its greatest extent, the GS&WR includes, in addition to the Dublin – Cork main line, the Dublin – Waterford and Mallow – Waterford lines and numerous branch lines.
There are earlier attempts to set up main line railways into the south of Ireland, but the 1840s efforts of Peter Purcell, a wealthy landowner and mail coach operator, and his associates ultimately prove successful with the implementation of a bill passed on August 6, 1844, for the GS&WR. Purcell is actively assisted by engineer John Benjamin Macneill, who has done surveys for the London and Birmingham Railway and has connections in London. The GS&WR’s vision to provide a single railway for most of the south of Ireland finds favour with United Kingdom Prime Minister Robert Peel as having likely more profitably for wealthy investors and because a single company will be easier to control. These factors likely ease the passage of relevant legislation.
William Dargan, Ireland’s foremost railway contractor, builds much of the GS&WR’s main line and a number of its other routes.
The directors choose to begin by construction of the 32.5 mile (52.3 km) stretch of the Dublin – Cork main line as far as Cherryville Junction just west of Kildare and the 23.5 mile (37.8 km) branch to Carlow with contracts shared between McCormack and Dargan. Work begins in January 1845 with services commencing on August 4, 1846. Trains are scheduled to take about 2 hours, 35 minutes for the 56 mile (90 km) stretch to Carlow and coach connections are arranged to Kilkenny, Clonmel, Waterford and the evening mail coach for Cork.
In July 1848, the main line reaches Limerick Junction, where it meets the Waterford and Limerick Railway and thus links Dublin and Limerick by rail.
In October 1849, the main line reaches the outskirts of Cork, where the GS&WR opens a temporary terminus at Blackpool. The final 1-mile (1.6 km) of line from Blackpool to the centre of Cork includes a 1,355-yard (1,239 m) tunnel and is not completed for another six years. Services through the tunnel begin in December 1855, running to and from a second temporary terminus beside the River Lee. Finally, the present Cork terminus in Glanmire Road opens in July 1856.
