History in Structure

This site is entirely user-supported. See how you can help.

Dyfnant Bridge (Canal Bridge No 125)

A Grade II Listed Building in Llangattock, Powys

We don't have any photos of this building yet. Why don't you be the first to send us one?

Upload Photo »

Approximate Location Map
Large Map »


Latitude: 51.8691 / 51°52'8"N

Longitude: -3.2003 / 3°12'1"W

OS Eastings: 317451

OS Northings: 219632

OS Grid: SO174196

Mapcode National: GBR YY.SDSB

Mapcode Global: VH6CG.G8ZY

Entry Name: Dyfnant Bridge (Canal Bridge No 125)

Listing Date: 21 October 1998

Last Amended: 21 October 1998

Grade: II

Source: Cadw

Source ID: 20691

Building Class: Transport

Location: Located on the W edge of the community, the bridge carries a tarmaced driveway over the canal from the B4558 road to Dyfnant stables in Llangynidr community.

County: Powys

Community: Llangattock (Llangatwg)

Community: Llangattock

Locality: Pen-y-Bryn

Traditional County: Brecknockshire

Find accommodation in


The Brecknock and Abergavenny Canal was proposed in 1792 to connect the Upper Usk valley to the Monmouthshire Canal at Pontymoile and from there to the sea at Newport. The middle section of the canal, between Gilwern and Talybont and including Llangattock, was cut between 1797 and 1799. The upper section between Talybont and Brecon opened in 1800, both sections being engineered by Thomas Dadford. The lower section between Gilwern and Pontymoile was completed in 1812 and was engineered by William Crosley. The canal was sold to the Monmouthshire Canal Company in 1865, which was later incorporated into the Great Western Railway. The last toll was taken on the canal in 1933 and it was finally abandoned in 1962. The canal, renamed the Monmouthshire and Brecon Canal, has been undergoing restoration since 1964, and is currently used by pleasure craft.

This bridge lies within the section constructed by Thomas Dadford between 1797 and 1799.


Single-span hump-backed bridge of rubble sandstone, with asymmetrical segmental arch and continuous parapets. The arch has thin voussoirs and keystones. The parapets are splayed with square end piers and copings of upright stones (except where repaired). On the E (downstream) side is a cast iron plaque with the bridge number cast in relief. To the NW, the parapet is butted by a retaining wall to the driveway. A stone stile leading to the towpath is built into this wall.

Reasons for Listing

Listed for its special interest as one of a group of well-preserved original Brecknock and Abergavenny Canal bridges.

Other nearby listed buildings

  • II Dyfnant
    On N side of Monmouthshire and Brecon Canal approximately 1.9km E of Llangynidr church.
  • II Gliffaes Lodge
    On N side of entrance to Gliffaes, immediately W of main gates.
  • II Gates and gatepiers at entrance to Gliffaes
    At entrance of private drive to Gliffaes, on S side of a minor road to S of Myarth hill.
  • II Barn immediately to N of Pen-y-Bryn farmhouse
    Located 300m off a narrow lane which rises as it leads southwards from the Usk valley and B4558 road. The barn forms the NE corner of the farmyard, to the N of the house.
  • II Pen-y-Bryn
    300m N of a narrow lane which rises from the Usk valley and the B4558. Stone walls bound the gardens. In the yard is a stone mounting block. To the N of the house is the threshing barn, to the W of
  • II Spiteful Inn Bridge (Canal Bridge No 124)
    Located 0.5km from the W edge of the community, the bridge carries a track over the canal from the B4558 road to fields on the Glanusk Estate.
  • II South Terrace at Gliffaes
    On the S side of Gliffaes above a steep embankment to the River Usk
  • II Gliffaes
    On N bank of River Usk and reached by private drive S of a minor road on S side of Myarth Hill.

BritishListedBuildings.co.uk is an independent online resource and is not associated with any government department. All government data published here is used under licence. Please do not contact BritishListedBuildings.co.uk for any queries related to any individual listed building, planning permission related to listed buildings or the listing process itself.

British Listed Buildings is a Good Stuff website.