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Aqueduct over Afon Lwyd, Monmouthshire and Brecon Canal

A Grade II Listed Building in Pontypool, Torfaen

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Latitude: 51.6968 / 51°41'48"N

Longitude: -3.0233 / 3°1'23"W

OS Eastings: 329371

OS Northings: 200282

OS Grid: SO293002

Mapcode National: GBR J4.4B76

Mapcode Global: VH79S.KM22

Plus Code: 9C3RMXWG+PM

Entry Name: Aqueduct over Afon Lwyd, Monmouthshire and Brecon Canal

Listing Date: 7 August 1997

Last Amended: 7 August 1997

Grade: II

Source: Cadw

Source ID: 18733

Building Class: Transport

Location: It is about 450m south-east of Pontymoile roundabout approached by the canal towpath from Pontymoile basin. Spans the border between New Inn and Pontymoile communities.

County: Torfaen

Town: Pontypool

Community: New Inn

Community: New Inn

Locality: Monmouthshire and Brecon Canal

Built-Up Area: Pontypool

Traditional County: Monmouthshire

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The Brecknock and Abergavenny Canal was promoted in 1792 to connect the upper Usk valley to the Monmouthshire Canal at Pontymoile and from there to the sea at Newport. Construction began in 1797, with Thomas Dadford Jnr. as engineer, and the first section, from Gilwern to Llangynidr was completed in that year with the stretch as far as Brecon following in 1800. Work then stopped for a time with the result that the section to the Blaenavon Road east of Govilon was not completed until 1805, now with Thomas Cartwright as engineer. Further funds had to be raised and the last section from west of Llanfoist to Pontymoile was completed betwen 1809 and 1812, with William Crosley as engineer. Linked to the tramroads the canal was an important artery for trade in iron, lime and coal. In 1865 the Monmouthshire and the Brecknock and Abergavenny Canal Companies merged becoming the Monmouthshire and Brecon Canal Company. Later still in 1880 the canal was bought out by the Great Western Railway and gradually the canal was run down until it was abandoned finally in 1962. Restoration work was begun in 1964, and the canal is once again open between Pontymoile and Brecon with the title Monmouthshire and Brecon Canal.


Built of squared coursed stone with dressed voussoirs and pilaster bands. A tall single arch aqueduct of very solid appearance with a semi-circular arch framed by narrow pilaster strips and a band across at the crown. Deep curved wing walls, and a parapet rests on another band. This is a handsome structure with the same treatment on either face, but the downstream side has the additional interest of the masonry weir below. This aqueduct crosses the boundary into Pontymoile Community Area.

Reasons for Listing

This is a very handsome and well built canal aqueduct, and a major structure surviving in use for this important canal.

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