Weir, Deanston Mills, Deanston is a Grade A listed building in the Stirling local planning authority area, Scotland. First listed on 31 January 1992. Dam.
Weir, Deanston Mills, Deanston
- WRENN ID
- watchful-lancet-flax
- Grade
- A
- Local Planning Authority
- Stirling
- Constituency
- Stirling and Strathallan MP: Chris Kane (Lab)
- Country
- Scotland
- Date first listed
- 31 January 1992
- Type
- Dam
- OS grid reference
- NN 703 026
- Coordinates
- 56.19888, -4.09189
- Source
- Historic Environment Scotland listing
Description
The weir at Deanston Mills, built around 1827 by James Smith for James Finlay and Co, is a significant structure located on the River Teith. This massive gravity dam is faced in sandstone ashlar and is designed as a self-clearing type, set diagonally across the river. It features a log trap on the northern side and a fish ladder on the southern side. The tail of the weir is fish-tailed. On the southern side, there is a masonry wall with sluices, which include cast iron frames and hakes for trapping leaves and other debris, serving the lade to the mills.
Local climate
Weir, Deanston Mills, Deanston sits in one of the wettest parts of the UK, with an average of 1,350 mm of rain a year. This makes it wetter than 96% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.
It experiences an average of 58 freeze-thaw cycles a year, more than 97% of listed buildings. Of these, 34 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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- 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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