History in Structure

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

Bridge 149 over the Montgomeryshire Canal and Lock

A Grade II Listed Building in Llandyssil, 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: 52.5412 / 52°32'28"N

Longitude: -3.2521 / 3°15'7"W

OS Eastings: 315178

OS Northings: 294440

OS Grid: SO151944

Mapcode National: GBR 9V.DZZY

Mapcode Global: VH684.LD38

Entry Name: Bridge 149 over the Montgomeryshire Canal and Lock

Listing Date: 14 July 1997

Last Amended: 14 July 1997

Grade: II

Source: Cadw

Source ID: 18535

Building Class: Transport

Location: Located off a narrow lane which runs to the W of the A 483 and the River Severn. A small group of buildings including New House lie to the W.

County: Powys

Community: Llandyssil (Llandysul)

Community: Llandyssil

Locality: Dolforwyn

Traditional County: Montgomeryshire

Find accommodation in


This stretch of the Montgomeryshire Canal (the Western Branch) was constructed between 1815 and 1821 under the direction of the engineer, Josias Jessop. The bridge and lock date from this phase of construction. The blue brick repairs are probably of the late C19.


Bridge, with lock chamber extending to the S from the abutments. Single span brick arched bridge with keystones. Chamfered sandstone string course, blue brick parapets and sandstone copings. The parapets continue as curved returns terminating in piers with pyramidal sandstone copings. Steps lead down to the towpath on the E side immediately N of the bridge, and there is a cast iron handle. On the W side to the N is a blue brick projection with sandstone coping which contains the flat arched outflow of the overflow culvert. The lock chamber is of brick with sandstone copings. It is heavily overgrown but contains the remains of timber lock gates at the N end. There are cast iron-lined rebates for gates at both ends. The remains of a cast iron rack and pinion-operated gearing mechanism can be seen at the S end. The brick-lined overflow culvert is on the W side of the lock. To the S it is separated from the canal by a wide low brick wall.

Reasons for Listing

Listed as a significant element of the engineering works associated with the western branch of the Montgomeryshire Canal.

Other nearby listed buildings

  • II Bridge 150 over the Montgomeryshire Canal
    Located approximately 200m SW of Bridge 149 and its adjoining lock. The bridge carries a farm track linking two fields.
  • II Bridge 148 and Byles Lock
    Located off a narrow lane which runs to the W of the A 483 and the River Severn. The lock keeper's cottage lies to the W.
  • II Castle Cottage
    The cottage is sited in woodland on the ridge immediately SW of Dolforwyn Castle.
  • I Dolforwyn Castle
    Located on a sharp promontory above the Severn Valley, in an excellent defensive position, with good views all round.
  • II Oak Tree Cottage
    Located on a narrow lane, to the rear of the Waterloo Arms in Abermule
  • II Cilgwrgan
    Located in a low-lying position in the Severn valley fronting the A483.
  • II The Cottage
    Located alongside a narrow lane leading SW from the A483 at Dolforwyn.
  • II* Brynderwen Bridge and Bridge 147 over the Montgomeryshire Canal
    Two bridges on the B4368 which links the A483 and Abermule village. Brynderwen bridge crosses the River Severn, to the E of bridge 147 over the Montgomeryshire canal.

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.