Dam above the Raby Furnace is a Grade II listed building in the Carmarthenshire local planning authority area, Wales. First listed on 16 October 1998. Dam.
Dam above the Raby Furnace
- WRENN ID
- tall-attic-foxglove
- Grade
- II
- Local Planning Authority
- Carmarthenshire
- Constituency
- Llanelli MP: Dame Nia Griffith (Lab)
- Country
- Wales
- Date first listed
- 16 October 1998
- Type
- Dam
- Address
- Dam above the Raby Furnace, Llanelli, Llanelli Rural
- OS grid reference
- SN 503 016
- Coordinates
- 51.6935, -4.16592
- Source
- Cadw listing
Description
The dam above the Raby Furnace is constructed from masonry similar to that of the furnace itself. It likely created a pool that provided water power for operating the furnace's bellows. On the south face of the dam, there are several arched openings near the east bank, along with a high-level tunnel. Currently, water is released through a modern spillway into an old culvert.
Water was probably drawn from the pool using a sluice and directed at high level to a waterwheel that powered the furnace's bellows. The culvert that now carries the entire stream from the dam past the furnace has been excavated and appears to date from the same period as the furnace.
Local climate
Dam above the Raby Furnace sits in one of the wettest parts of the UK, with an average of 1,430 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 10 freeze-thaw cycles a year, fewer than 91% of listed buildings. Of these, 3 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
- 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
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