The Calliope Range Deviation project involved the realignment of a 4.5km section of the Dawson Highway, approximately 75km west of Gladstone in Central Queensland.
| Name | Calliope Range Deviation |
|---|---|
| Services Provided | Contract Administration |
| Civil Support Role | Superintendent |
| Client | Transport and Main Roads |
| Project cost | $47M |
| Contract cost | $30M |
| Contract Type | RCC |
| Construction Type | 90% Greenfield – 10% Brownfield |
| Construction Period | Mar 2010 – Mar 2012 |
The project involved the realignment of a 4.5km section of the Dawson Highway, approximately 75km west of Gladstone in Central Queensland. The project provided a deviation on the Dawson Highway that enabled the decommissioning of the old Calliope Range crossing and the removal of a significant sub-standard section on the link between Gladstone and Biloela, dramatically improving safety and transportation efficiency. Major aspects of the project included bulk earthworks (inc. cuts up to 28m deep), blasting, soil nailing and shotcreting, rock bolting, a 2 span reinforced concrete bridge, extruded concrete barrier, pavements, seal and asphalt.
Environmental issues were critical on the Calliope Range and as part of the project there was successful translocation of 500+ cycads and fortnightly auditing by qualified Environmental Officer. The project also required the review and approval of complex erosion and sediment control measures to manage runoff in the steeply sloped undulating terrain.
Civil Support filled the role of Superintendent for a period of approximately 6 months in the successful delivery of this challenging project. Civil Support was engaged as the Superintendent at a time when the Contractor had submitted several significant latent conditions claims in relation to the condition of rock in one of the deepest cuts on the project together with the identification of a high risk of boulder movement / dislodgement on adjacent slopes. At this time as well the project experienced a period of unusually high rainfall. Civil Support instigated the geotechnical investigation into the stability of the boulder field adjacent to the new alignment and prepared the documentation for the construction of a $400k boulder fence to mitigate the newly identified slip/ rock fall hazard.
Design parameters needed be continually revisited as the project progressed to provide for unidentified deficiencies and constructability issues in the initial design. Civil Support was able to draw on the years of first hand construction supervision experience and provide a high quality end product that was acceptable to the Principal.
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