Chirk Tunnel

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Chirk tunnel viewed from Chirk aqueduct

Chirk Tunnel is a canal tunnel at Chirk in Denbighshire close to the border with Shropshire.

It lies on the Llangollen Canal, immediately northwards of the Chirk Aqueduct. It is 460 yards long and has a complete towpath inside. The tunnel is designed for a single standard narrowboat, so passing is not possible. Fortunately the tunnel is straight enough to be able to see if a boat is already inside the tunnel (boats are required to show a light).


Southern portal of the tunnel

In 1791, the embryonic Ellesmere Canal was planning a network of canals to link the Chester Canal to Shrewsbury, with branches to Ruabon and Llangollen, Bersham, Llanymynech and possibly to Whitchurch and Wem. The promoters asked William Jessop to assess their plans, and he produced plans for a rather different route, running from the Chester Canal basin through Wrexham, Bersham, Ruabon, Pontcysyllte, Chirk, Frankton and Weston to reach Shrewsbury. The route would have involved three tunnels, one of 4,607 yds at Ruabon, one of 476 yds at Weston, and a tunnel under the Froncysyllte limeworks at Chirk, which would have been 1,236 yds long.[1]

Rival parties supporting the different routes joined forces in February 1793, and the canal was authorised by Act of Parliament on 30 April of that year. A whole series of alterations and deviations had been rushed through in the intervening months, and the canal at Chirk now crossed the River Ceiriog at a different location, resulting in a shorter tunnel.[2] The contract for the adjacent aqueduct was let in January 1796, and its construction was completed in 1801. The eight miles of canal eastwards to Frankton was opened immediately, because of the valuable trade in limestone from the Fron Quarries. The section through the tunnel, which also passed through Whitehouse Tunnel to reach Pontcysyllte was opened in June 1802.[3]

Walking through the tunnel

The tunnel is claimed to be the first in Britain to have a towpath running through it (along with its shorter neighbour - Whitehouse Tunnel).[4] However, Berwick Tunnel on the Shrewsbury Canal was open by 1797 and included a towpath throughout its 970-yds length.[5] As the tunnel at Chirk is completely unlit, it is preferable to use a torch when walking through the tunnel, as towards the centre it is pitch black. There is however a wooden handrail along the entire length to prevent walkers falling into the canal.


  • Hadfield, Charles (1985). The Canals of the West Midlands. David and Charles. ISBN 0-7153-8644-1. 


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