Rocky Bottom Creek Crossing & Goyder River Rectification

project details

Location:
Central Arnhem Road, East Arnhem, NT
Client:
Department of Infrastructure
Contract Value:
$7.2M
Commencement Date:
26 August 2015
Completion Date:
02 September 2016
Referees:
Richard Underhill, Project Director Civil Delivery, Northern Territory Government

Sitzler was awarded the contract to build a new Rocky Bottom Creek Bridge to alleviate flooding issues that routinely forced road closures along the Central Arnhem Road. The site was located approximately 410 km from the Stuart Highway. Sitzler constructed a bridge on a new road alignment using an innovative, modular bridge superstructure technology. During the construction Sitzler maintained a 50-man accommodation camp for its project team and for subcontractors.

The contract also included a package of works at the Main Goyder River Bridge and the Minor Goyder River Bridge on the Central Arnhem Road, 370 km from the Stuart Highway. This package of work comprised an investigation into the capacity of piling foundations and subsequent rectification work to safeguard the structural integrity of the bridges.

For the construction of the Rocky Bottom Bridge, Sitzler introduced a key innovation in the way of a modular bridge superstructure made of steel. The modular system called Unibridge allowed for the deletion of a central pier that’s to its longer free span capacity. The Unibridge was installed in under 4 days. By project completion, Sitzler had delivered:

Rocky Bottom Creek
• 3.2km road realignment
• 30m long single lane, high-level bridge crossing
• Unibridge modular bridge superstructure completed on D&C basis

Goyder River Crossing Phase 1
• Construction of three cast-in place reinforced concrete test piles
• High-strain load testing and dynamic analysis

Goyder River West Channel, Phase 2
• Installation of two additional cast-in place reinforced concrete strengthening piles
• Construction of two reinforced concrete pilecap extensions