Mine Buildings Including Wheel Pit and Arsenic Calciner Wheal Benny is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 19 October 1987. Mine buildings.
Mine Buildings Including Wheel Pit and Arsenic Calciner Wheal Benny
- WRENN ID
- stony-hinge-burdock
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- South East Cornwall MP: Anna Gelderd (Lab)
- Country
- England
- Date first listed
- 19 October 1987
- Type
- Mine buildings
- Address
- Mine Buildings Including Wheel Pit and Arsenic Calciner Wheal Benny, Calstock
- OS grid reference
- SX 397 731
- Coordinates
- 50.53592, -4.26268
- Source
- Historic England listing
Description
The mine buildings at Wheal Benny, including a wheel pit and an arsenic calciner, date from the late 19th century. They are constructed from slatestone rubble with brick dressings. The site is located on the bank of the River Tamar and features a wheel pit large enough to accommodate a 50-foot wheel, four tin buddles, and a Brunton calciner with flues. The calciner has a square plan and includes a round-arched opening at the front that leads to an internal vault, with a grate located on the left side. The flues are situated to the west of the calciner, above ground, and feature arched openings. At the eastern end of the site, there is a wheel pit with rubble walls and an external rubble housing for the wheel shaft. The mine was powered by water, with a leat running above the mine to the south.
Local climate
Mine Buildings Including Wheel Pit and Arsenic Calciner Wheal Benny sits in a wetter-than-average part of the UK, with an average of 1,010 mm of rain a year. This makes it wetter than 81% 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 14 freeze-thaw cycles a year, fewer than 86% of listed buildings. Of these, 5 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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