Castleblayney, Keady and Armagh Railway

The Castleblayney, Keady and Armagh Railway (CK&A) was an Irish gauge railway in Ulster. It linked Armagh in County Armagh with Castleblayney in County Monaghan. The Armagh – Keady section was opened in 1909 and closed in 1957. The Castleblayney – Keady section was opened in 1910 and closed in 1924.

History
In 1899 a Bill was presented to Parliament to build a railway linking Kingscourt on the Midland Great Western Railway (MGW) with Armagh on the Great Northern Railway (GNR). It was defeated.

The next year Parliament passed an Act to incorporate the Kingscourt, Keady and Armagh Railway Company, but the new company was unable to begin construction. Instead it reached agreement with the GNR to build the 28 mi section between Castleblayney and Armagh, and abandoned the planned section between Castleblayney and Kingscourt. A new bill in 1902 reincorporated it as the Castleblayney, Keady and Armagh Railway Company.

Construction began in 1903; the first passenger services did not run until 31 May 1909, when the 10 mi between Armagh and Keady was opened, although goods trains had started in March 1908. The 8 mi section between Castleblayney and Keady was opened on 11 November 1910, and the GNR (which was working the line) took over the company on 1 June 1911. The line attracted some freight but passenger traffic was light. Some passenger services were worked by a push–pull train formed of a single coach worked by a locomotive such as a BT class 4-4-0T dating from the 1880s. Freight trains were commonly worked by UG class 0-6-0s.

The Partition of Ireland in 1922 turned the Armagh–Monaghan county boundary between Creaghanroe and Carnagh into an international frontier that resulted in the GNR closing the Castleblaney – Keady section from 2 April 1923 (the customs border came into effect on Sunday 1 April) and withdrew passenger services from the Keady – Armagh section from 1 February 1932. In 1957 the Government of Northern Ireland made the GNR close much of its remaining network in Northern Ireland, including goods traffic from the remaining section of the CKA from 1 October 1957.

Features
The line's summit at Carnagh was 613 ft above sea level, the highest place on the GNR.

The 570 ft–long Tassagh Viaduct, north of Keady, is a composite. Its spandrels and parapets are stone, but its piers are reinforced concrete and the piers and the undersides of its 11 arches are faced with brick. This is a substantial saving in weight and construction compared with earlier purely stone or brick viaducts. The viaduct over the Callan River at Ballyards, by contrast, is faced entirely with stone.