Bridges

What We Have Achieved

Third Hunter River Crossing

December 2008

Client Information

RTA, NSW

  • Duration: 104 weeks
  • Value: $33.5 million
  • Location: East Maitland - Bolwarra
  • Project Details

Scope of Work

The project featured two new bridges – The first being a 350m long, 12 span concrete bridge structure across the Hunter River. The structure involved 28m deep bored piles, up to 14m high square columns and 32m long precast prestressed super-T girders. The deck consists of structural concrete overlain by an asphalt wearing course.

The second bridge was a 47m long three span bridge across the Main Northern Rail Lines. The structure consisted of 30m deep bored piles, pile cap, blade wall columns and precast prestressed super-T girders.

The earthworks component of the project involved approximately 5.5km of two lane single carriageway roadworks constructed under local traffic conditions. The 11m wide formation was constructed using a combination of site won alluvial soils and 150,000m3 of imported gravels from Daracon’s Stockrington Quarry. The pavement consisted of a free draining granular select material overlaid by a heavily bound gravel base with materials supplied from Daracon’s Martins Creek Quarry.

The wearing course was constructed from a 45mm heavy duty asphalt and where the new formation travelled on top of the Hunter River levee banks a bitumen/aggregate seal was utilised.

Significant Achievements

  • The Project was completed six months ahead of Contract program.
  • Placement of six 38 tonne super-T girders across the rail lines, in a restricted nine hour window using 450 tonne mobile crane.
  • Major construction activities in a high profile environmentally sensitive area for an 80 week duration without incident.