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Theme from shaft


We would like to correct some errors which crept into the story Breakthrough sought in Crossrail shaft row (NCE 11 November) concerning the proposal to build a ventilation shaft for Crossrail at Hanbury Street in Spitalfields.

During construction, the shaft will be used as a launch point for three tunnel boring machines, not two. Two TBMs go west to Fisher Street, near Holborn, and the third drives East to Whitechapel station.

After 18 months when excavation of the shaft is complete and the tunnel boring machines have been launched, the shaft will be covered.

A construction shaft at Pedley Street on disused railway land to the north of Hanbury Street will connect to the Hanbury Street shaft underground by a temporary construction tunnel.

All tunnelling operations will transfer to the Pedley Street site to minimise impact at Hanbury Street. Material excavated will be removed at the Pedley Street site and transported by conveyor alongside the Great Eastern Main Line railway to sidings at Mile End, where it would be loaded onto trains for onward disposal.

Our current proposals do not include the use of Bishopsgate Goods Yard for removal of excavated material.

Gordon Torp-Petersen, Crossrail Tunnels Design Manager, Cross London Rail Links, 1 Butler Place, London SW1H 0PT

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