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Breakthrough on Southern Water's M3 tunnel

Water company breaks through on tunnel under UK motorway while traffic continues overhead

Duncan Moore
Working on Southern Water’s Southampton Link Main, the TBM Mary Anning has broken through on its drive under the M3 motorway

Working on Southern Water’s Southampton Link Main, the TBM Mary Anning has broken through on its drive under the M3 motorway | Credits: Southern Water

A major new water supply pipe for Hampshire has taken a big step forward after its tunnel was completed deep beneath the M3 motorway in the UK. Working 7m underneath the M3, the TBM, named Mary Anning,...

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