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Contractors are nearing the end of a three-year programme to plug disused mines in the Cheshire town of Northwich

Northwich means two things – salt and subsidence – and the two are linked. People have mined the salt below Northwich since Roman times, makingthe mining companies rich,but creating huge cavities under the ground into which the modern town could suddenly sink. Salt was mined for more than 2,000 years at Northwich, rightup until 2006.

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