Boulby Mine Chapter 3
Boulby Mine, on the North Yorkshire coast, is Britain’s deepest mine.  It is 1,250 metres deep and has a 620 mile network of underground tunnels and roads extending out under the North Sea.Since 1973, the mine has produced half of the UK’s supply of potash, used in fertiliser, glass making and in the chemical and pharmaceutical industries.  The Potash mining districts extend both under the North Sea and out towards the North Yorkshire Moors where miners extract ore in the pitch darkness with just small cap lamps and vehicle headlights to see by.   The air is thick with dust which is safely absorbed by the body. Miners carry bowsers filled with iced water to prevent dehydration