Tunnelling Contractor of the Year

A Joint Venture of Jay Dee Contractors, Frank Coluccio Construction, and Taisai successfully completed the Brightwater West tunnelling contract north of Seattle. Its Lovat earth pressure balance tunnel boring machine (TBM) had successfully negotiated a shallow crossing of a railway line before boring to a depth of over 100m at pressures of up to 5bar. Local client, King County then asked if the TBM could continue to mine the tunnel for the adjacent Brightwater Central contract where another TBM had been damaged and had to be abondoned. Read more...