Tunnel carrying Brynich stream under Brecon & Abergavenny Canal (partly in Brecon community) is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 July 2005. Culvert. 1 related planning application.
Tunnel carrying Brynich stream under Brecon & Abergavenny Canal (partly in Brecon community)
- WRENN ID
- iron-flue-ridge
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 28 July 2005
- Type
- Culvert
- Address
- Tunnel carrying Brynich stream under Brecon & Abergavenny Canal (partly in Brecon community), Cefn Brynich, Llanfrynach, Powys, LD3 7SH
- OS grid reference
- SO 069 276
- Coordinates
- 51.93927, -3.35459
- Source
- Cadw listing
Description
This is a stone-lined culvert that carries the Brynich stream underneath the Brecon and Abergavenny Canal. It features a segmental arch at the southern end, constructed with cut stone voussoirs. Above the arch, there is a low retaining wall made of squared stone. The culvert is flanked by splayed stone retaining walls on each side.
Local climate
Tunnel carrying Brynich stream under Brecon & Abergavenny Canal (partly in Brecon community) sits in one of the wettest parts of the UK, with an average of 1,260 mm of rain a year. This makes it wetter than 93% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.
It experiences an average of 56 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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
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- No EPC on record for this property
- No sale records on file
- Related listed building consents — 1 application
- 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 Culvert taking Blaen Bran under Monmouthshire and Brecon Canal
- 2 Embankment & Aqueduct of Brecknock & Abergavenny Canal inc. N Revetment Walls and SW Overflow Bridge
- 3 Canal Bridge No 161 Brecon & Abergavenny Canal
- 4 Aqueduct over Dowlais Brook on Monmouthshire and Brecon Canal (partly in the Llantarnam community)
- 5 Canal Bridge No 162 Brecon & Abergavenny Canal
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