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Refurbishment work is under way at Dartford

Refurbishment work is under way at Dartford on two shafts constructed in the 1930s, as part of a failed first attempt to construct a river tunnel crossing of the Thames estuary. The two 30m deep, 6m diameter shafts, sited on either side of the river, today provide access for maintenance of the two modern tunnels, the first of which was opened in 1963. After 60 years the shaft linings are being refurbished with a new protective coating. Contractor North Kent Shotblasting is removing ...

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