We are just off the Lissummon Road near Jerrettspass outside Newry. After driving along the Tunnell and Lisummon roads for an hour we finally located the hidden Lissummon tunnel right down at the bottom of a farmers field surrounded by trees. There are no signs or indications that this 1 mile long abandoned railway tunnel is there. We hadn't a map. I don't believe there is one. It was extremely difficult even to get to the tunnel entrance. There we found a new spiked big metal gate. Happily it wasn't locked. We had arrived! ( This gate could soon have a lock on it! )
“Construction of the Newry to Armagh railway – part of an ambitious 72-mile line to Enniskillen – began in August 1846 under the direction of engineer John Godwin. But inflated costs and mismanagement conspired to ensure it was not completed for another 18 years. The 3½-mile Newry-Goraghwood section opened in 1849 but work on the through route stalled, only getting underway in October 1861. This was to include a short tunnel at Loughgilly and a much longer one under Lissummon Hill.
Planned at a length of 1,604 yards but extended to 1,759 yards, it was driven with the benefit of six construction shafts – two of them 200 feet deep – creating 14 working faces. One man lost his life after falling down a shaft.
Built to accommodate a single track, Lissummon is Ireland’s longest railway tunnel and the first in-service train passed through on 25th August 1864. Perfectly straight but on a rising gradient of 1:75 to the north, the tunnel is masonry-lined but with some localised brickwork such as around the refuges. These are located at 20-yard intervals along the north wall.
The route’s passenger services were withdrawn following a strike in 1933 but goods trains continued to use this section of the line until 1957. Today the tunnel remains in fair condition but suffers through water penetration particularly around its central section.”
Joe Mahon recently brought the historical architectural and engineering importance of this hidden gem to light In his excellent Ulster Giants Series. This was broadcast 23rd July 2018.

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