Preparatory works for Chiltern tunnels on HS2 route
HS2 preparatory works at the South Portal Chalfont Lane site, source: HS2 Ltd
HS2’s contractors are carrying out the preparatory works on the launch site close to South Heat in Buckinghamshire. Next year, two boring machines will start to drill the 16-kilometre-long railway tunnels through the Chiltern Hills, northwest from London. It will be the largest construction site of the project.
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