US-based Soletanche Bachy subsidiary Nicholson Construction has said that it has started work on part of the Dugway Storage Tunnel in Ohio.
Nicholson’s work included construction of a secant pile wall for temporary support during excavation for the tunnel which forms part of the Northeast Ohio Regional Sewer District improvement programme and will be used to store stormwater overflow.
The 4.5km, 8m diameter tunnel will be constructed at 60 to 78m below ground level and will call for Nicholson to construct the deepest secant pile wall ever built in the city of Cleveland. The tunnel has been designed by MWH and Mott MacDonald in joint venture and will be built by Salini Impregilio Healy.
“Nicholson is installing one of the deepest secant pile structures in the city of Cleveland,” said Nicholson special project division manager Russell Cooper. “The work will be technically and logistically challenging.”
Nicholson has said that it expects to complete the piling work in autumn 2016 and the overall project is due to be finished in 2020.