WBHO undertook two projects involving duplication of a total of 8.5km of Sunshine Motorway, including the construction of on and off ramps to interchanges and bridges.
Works included 350,000m3 of earthworks, 15km of drainage, multiple box culverts, services relocation, ITS works and landscaping. Works included constructing three new 20-cell culvert structures. This was completed in tidal flow conditions, during a high rainfall period and on unstable ground without incident or environmental harm. 40,000m3 of rock foundation and subgrade treatment wrapped in geofabric was imported to stabilise areas.
Delivery was on time and budget, and was undertaken in a live operational environment, with over 35,000 vehicles per day.