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Pentrefelin Tramway Viaduct

A Grade II Listed Building in Llantysilio, Denbighshire

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Latitude: 52.985 / 52°59'5"N

Longitude: -3.1854 / 3°11'7"W

OS Eastings: 320512

OS Northings: 343729

OS Grid: SJ205437

Mapcode National: GBR 6Y.HSVZ

Mapcode Global: WH784.17DG

Entry Name: Pentrefelin Tramway Viaduct

Listing Date: 22 April 1998

Last Amended: 22 April 1998

Grade: II

Source: Cadw

Source ID: 19685

Building Class: Transport

Location: The viaduct crosses the valley of the River Eglwyseg immediately NE of the junction of the A542 and the B5103 at Pentrefelin.

County: Denbighshire

Town: Llangollen

Community: Llantysilio

Community: Llantysilio

Locality: Pentrefelin

Traditional County: Denbighshire

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The horse tramway was designed by Henry Dennis for John Taylor & Son, and constructed in 1852 to carry slate from the Upper Cambrian slate quarries at Clogau, at Oernant (Maesyruchan), Moel-y-faen, and from above Valle Crucis, running 2.8km to their Llangollen Slab and Slate Works and wharf on Llangollen Branch of the Ellesmere (Shropshire Union) Canal. near Pentrefelin Bridge. It now survives as a landscaped item in gardens.


A rubble stone revetted embankment approximately 130m long, the track raised above the stone-on-edge copings by a further embankment. The wall is punctured by three spaced arches, the centre arch wider and spanning the river Eglwyseg, and one narrower flood arch each side. All arches have rusticated and margin dressed stone quoins and voussoirs to the semi-circular arch, the keystone alone slightly emphasised, all flanked by pilaster buttresses. The centre arch is said to carry the date 1857. The S side has 7 large raking buttresses, perhaps a later addition.

Reasons for Listing

Included as a well preserved example of a horse tramway viaduct, and of significance as a relic of the slate extraction industry which once formed a major part of the economic life of the Llangollen district.

Other nearby listed buildings

  • II Pentrefelin House
    The house stands above the canal and River Dee, at the junction of the Horseshoe Pass road with the B5103 Rhewl Road.
  • II Pentrefelin (Afon Eglwyseg) Aquaduct
    Located in Pentrefelin, near the junction of the A542 with the B5013, NNW of Llangollen.
  • II Pentrefelin Bridge, Llangollen Canal Bridge No 48
    The bridge spans the Llangollen Canal N of Llangollen and immediately E of Pentrefelin, at the foot of the Horseshoe Pass, carrying the road to the Pentrefelin works which are immediately to W.
  • I Valle Crucis Abbey
    The abbey lies in the lower Eglwyseg valley between the main road and the river, approximately 0.9km N of Llangollen.
  • II Cottage at Valle Crucis Abbey
    The building is set between the abbey ruins and the river, south of the abbey fishponds.
  • II Henllys
    High above the modern A5, to NW of the town reached from a lane that was in the early C19 the main Holyhead Road. On levelled site with broad views to NE.
  • II Ty Craig Canal Bridge
    The bridge, No 48A in the series, spans the Llangollen Canal approximately 200m E of the Chain Bridge Hotel
  • II Well House at Abbey Farm
    The well house is built into the embankment of the road by Abbey Farm, facing the lane leading to Valle Crucis.

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