Wheal Sally
Wheal Sally was situated on the east side of Kerriack Cove and Bottom Shaft was sunk to a lode containing zinc and lead, both as sulphide ore and also in metallic form. A drainage adit runs from the shaft to a hole in the cliff, just above the beach.
When the biological weapons programme at Nancuke ended, waste materials were disposed of in one of the side shafts connecting to the adit. Given how water drips down the shafts into the adit and then runs out onto the beach, the potential flaw in this strategy should be apparent. Fortunately, after an extensive clean-up operation was carried out, no traces of hazardous materials were found. The adit is now blocked by a very substantial grille.
On walks
- Portreath to Tobban Horse (7.3 mile walk)