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TNRP, GREGORY, CARNARVON AND DAWSON HIGHWAYS


PROJECT OVERVIEW

As a result of major flooding across Queensland, the road network sustained significant damage between January and April 2010 and flood events in 2011. In response to this, Transport and Main Roads implemented the Transport Network Reconstruction Program (TNRP) to repair over 800 kilometres of damaged state controlled transport infrastructure.

Jointly funded by the Commonwealth and State Governments, CMC was awarded an extensive pavement rehabilitation package that comprised works over varying lengths of the Gregory Highway 27A, Dawson Highway 46D, and Carnarvon Highway 24E. Works were generally undertaken on the existing alignment and under traffic.

SCOPE

CMC’s scope of works largely involved clearing and grubbing; earthworks formation and pavement widening; associated culvert and drainage works; existing shoulder box out and replacement with granular pavement; insitu cement stabilisation including thin make up/shape correction layer; unbound pavement overlay; minor structures and kerbing; guardrail replacement and new installations; C170m bitumen primer seal and PMB top coat seal; line-marking and road furniture.

HIGHLIGHTS & OUTCOMES

Works were completed within the overall budget and on program.

Established and operated a 150 man temporary camp in Rollerston to overcome local accommodation shortages.

Provided transport from the camp to site each day as part of our heat and fatigue management strategy.

Used Subtype 2.5 material in shoulder boxouts to bridge poor underlying subgrade (black soil).

Utilised ice and retarder in concrete to keep it workable and overcome combination of heat and significant distance between sites and plants.

Implemented traffic management schemes tailored to manage high volumes of heavy mine vehicles passing through the worksites each day.

Recorded 143,487 manhours with zero LTIs.

Replaced a culvert at the local showground and raised money for a community defibrillator.

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