Winsford Salt Mine { 45 images } Created 30 Dec 2010

Winsford Rock Salt Mine is Britain's oldest working mine.

Operated by Salt Union, it is the UK's biggest rock salt mine and Britain's largest supplier of natural rock salt which is used primarily for the de-icing of the road network in winter.

'Room and Pillar' mining techniques are used to extract rock salt which are are more than 90% pure Sodium Chloride with the remaining insolubles consisting mainly of Keuper Marl.

Previously mined areas are converted into storage.

The Deepstore facility, 150m underground is the size of 700 football pitches and growing every year. Some of its uses are the storage of medical records, library publications, police evidence and museum artefacts.
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