Ventilation Shaft and Remains of Building About 400 Metres North West of Little Hyner is a Grade II listed building in the Dartmoor National Park local planning authority area, England. First listed on 9 March 1988. Ventilation shaft.
Ventilation Shaft and Remains of Building About 400 Metres North West of Little Hyner
- WRENN ID
- sacred-ashlar-falcon
- Grade
- II
- Local Planning Authority
- Dartmoor National Park
- Constituency
- Central Devon MP: Sir Mel Stride (Con)
- Country
- England
- Date first listed
- 9 March 1988
- Type
- Ventilation shaft
- OS grid reference
- SX 835 819
- Coordinates
- 50.62559, -3.64744
- Source
- Historic England listing
Description
The ventilation shaft and remains of a building are located about 400 metres north-west of Little Hyner, at the site of the Frank Mills silver-lead mine. This structure dates from around the mid-19th century and is constructed of stone rubble. It features a tapering shaft next to a ruinous building, both of which are surrounded by spoil heaps. Frank Mills mine was notable for being the most successful silver-lead mine in Teign, as well as the deepest and most exposed. The surrounding spoil heaps are highly toxic due to lead and arsenic, resulting in a complete lack of foliage cover.
Local climate
Ventilation Shaft and Remains of Building About 400 Metres North West of Little Hyner receives an average of 870 mm of rain a year. This makes it wetter than 63% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.
It experiences an average of 15 freeze-thaw cycles a year, fewer than 85% of listed buildings. Of these, 6 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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