Aqueduct carrying Montgomeryshire Canal over River Vyrnwy is a Grade II* listed building in the Powys local planning authority area, Wales. First listed on 5 April 1993. Aqueduct.
Aqueduct carrying Montgomeryshire Canal over River Vyrnwy
- WRENN ID
- solemn-arch-swift
- Grade
- II*
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 5 April 1993
- Type
- Aqueduct
- Address
- Aqueduct carrying Montgomeryshire Canal over River Vyrnwy, Lies Partly in Llandysilio Community Area, Carreghofa
- OS grid reference
- SJ 254 196
- Coordinates
- 52.76915, -3.10705
- Source
- Cadw listing
Description
The structure is an aqueduct that carries the Montgomeryshire Canal over the River Vyrnwy. It is a long five-arch masonry construction made of squared blocks, featuring capping bands and rusticated segmental arch rings with keystones and rusticated soffits. The aqueduct has V-shaped stepped cutwaters with an almond profile and domed cappings. There are lines of oval brace-plates for tie-rods through the haunches of the arches. The central arch and the outer north arch are supported by cradles of fish-bellied cast iron girders, which have tie-rods through the haunches and exposed rods beneath the soffits. The outer masonry ends are checked forward with curving abutments that descend to end at square piers near the river banks.
On the towpath side of the aqueduct, there are three tapering stone piers with cappings, and an ironwork handrail is set in stone seatings. The canal is contained by large masonry edges and puddled clay along its narrow length.
Local climate
Aqueduct carrying Montgomeryshire Canal over River Vyrnwy receives an average of 850 mm of rain a year. This makes it wetter than 58% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 66% of listed buildings.
It experiences an average of 41 freeze-thaw cycles a year, more than 78% of listed buildings. Of these, 22 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
Sign in or create a free account to unlock:
- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
- 1 Four-Arch Aqueduct over Vyrnwy Flood Plain (Northern Arches) New Bridge Vyrnwy
- 2 Lledan Brook Aqueduct and Weir
- 3 Abercarn Aqueduct and Bridge (partly in Abercarn Community)
- 4 Three-Arch Aqueduct over Vyrnwy Flood Plain (Southern Arches) New Bridge Vyrnwy
- 5 Aqueduct over Dowlais Brook on Monmouthshire and Brecon Canal (partly in the Llantarnam community)
this building 1 similar nearby listed buildings
Nearby listed buildings
- Road Bridge over River Vyrnwy
- Three-Arch Aqueduct over Vyrnwy Flood Plain (Southern Arches) New Bridge Vyrnwy
- Former Salt Warehouse at Newbridge
- Pentreheylin Bridge (No.97) over The Montgomeryshire Canal
- Four-Arch Aqueduct over Vyrnwy Flood Plain (Northern Arches) New Bridge Vyrnwy
- Bridge (No.98) over Montgomeryshire Canal
- Pentref
- Lock Gates and Paddle Gear
- Lower Lock Chamber to W of No 1 THe Locks
- Lower Lock Chamber