Boulby Potash Mine

Boulby Potash Mine is operated by Cleveland Potash Ltd, a subsidiary of Israel Chemicals Ltd. There are two 5.5m diameter shafts to a depth of around 1150m. The potash averages 7m in thickness but ranges from nil to over 20m. Beneath the potash there are rock salt beds of about 40m and the main roadways for the mine are driven in pure rock salt 8-10m below the potash.