The structure, the largest wastewater storage tunnel in Scotland, is designed to improve water quality and help cope with the risk of flooding in the city and pollution of the River Clyde.

The contract, which is worth around £82 million (€105m) involves the construction of two shafts with a diameter of 15 metres each and a depth of 20 metres, a 300 metre long cut-and-cover trench and a 5 km tunnel with an internal diameter of 4.70 metres. The technique used will be that of a mud pressure type tunnel boring machine, one of the VINCI’s areas of expertise.

Work will get under way in October 2014 and completion is anticipated in early 2018.

In the United Kingdom, VINCI Construction Grands Projects is currently building, in London, the Lee Tunnel for Thames Water and carrying out two Crossrail contracts (C510 and C512) at Liverpool Street and Whitechapel.