Wern Outfall Weir, Wern Mill is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 29 December 1994. Terraced houses.
Wern Outfall Weir, Wern Mill
- WRENN ID
- floating-timber-wind
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 29 December 1994
- Type
- Terraced houses
- Address
- Wern Outfall Weir, Wern Mill, Llandrinio
- OS grid reference
- SJ 251 141
- Coordinates
- 52.71977, -3.10941
- Source
- Cadw listing
Description
Wern Outfall Weir at Wern Mill is an oval structure made of red and blue bricks that revets a pond receiving water from the canal through a culvert. It features a weir and spillway with a central flume that is controlled by a ratchet paddle, directing water to the turbine race that culminates in a 3.6-meter deep vertical fall shaft of the former corn mill. Adjacent to this is a subsidiary spillway and a 450-meter long parabolic blue bypass channel.
Local climate
Wern Outfall Weir, Wern Mill receives an average of 840 mm of rain a year. This makes it wetter than 55% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 61% of listed buildings.
It experiences an average of 42 freeze-thaw cycles a year, more than 80% of listed buildings. Of these, 21 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.
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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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