Cherwell Creek Bridge Replacement

Engineering Project Details

Project Summary

The Cherwell Creek Bridge Replacement project was jointly funded with the Australian Government providing $2.75m from the Bridges Renewal Programme, with a 50:50 funding share arrangement with Isaac Regional Council. Council also contributed a further $500,000 as part of its 2016-17 Connecting Our Communities program.

The project delivered improved safety and flood resilience increasing the bridge deck height by approximately 7 metres to provide Q100 flood immunity. Motorists also experience improved traffic flow, with the bridge widened to 10 metres and alignment improvements increasing the speed limit from 60km/hr to 100km/hr.

Civil Support was engaged to develop the tender documentation and manage the tendering, evaluation and contract award. After the initial engagement, the Civil Support Project Manager identified constructability issues and risks with the current design, which was proposed to be on the existing alignment. By constructing the new bridge further downstream, traffic continued to use the existing structure, and with no reliance on a low level side-track, continuity of access to the mine sites along the Peak Downs Mine Road could be maintained at existing levels. During construction, the old bridge over-topped twice, so the re-design prompted by Civil Support’s involvement proved invaluable.

With the construction site approximately 4 hours drive from Civil Support’s office in Rockhampton, the Contract Administration team developed a targeted surveillance program, which minimised Council’s costs, but still provided confidence that the project quality requirements were being met. Innovation was achieved on this project through the installation of a remote access time lapse camera, which provided 24hr surveillance of the site, and a factual record of construction progress.

The project was delivered under budget, and construction was completed approximately 2 weeks early.

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