Osbaston Weir is a Grade II listed building in the Monmouthshire local planning authority area, Wales. First listed on 10 August 2005. Weir.
Osbaston Weir
- WRENN ID
- pale-flint-lark
- Grade
- II
- Local Planning Authority
- Monmouthshire
- Constituency
- Monmouthshire MP: Catherine Fookes (Lab)
- Country
- Wales
- Date first listed
- 10 August 2005
- Type
- Weir
- Address
- Osbaston Weir, Monmouth
- OS grid reference
- SO 501 138
- Coordinates
- 51.82119, -2.72515
- Source
- Cadw listing
Description
Osbaston Weir is a large stone structure that spans the River Monnow, creating a drop of approximately 3 to 4 meters. The dam features a concrete top, with a slope made of sandstone and other rubble. At the west end, there is a spillway, and at the north end, a sluice. The entire construction measures about 100 meters in length and represents a significant engineering achievement.
Local climate
Osbaston Weir receives an average of 820 mm of rain a year. This makes it wetter than 52% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 57% of listed buildings.
It experiences an average of 42 freeze-thaw cycles a year, more than 80% of listed buildings. Of these, 19 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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