Tower banner July, August (left)
Tower banner July, August (right)

CCF QLD names Interflow and Unitywater as finalists

An Interflow rehabilitation project, completed for Unitywater, is a finalist at the Civil Contractors Federation Queensland (CCF QLD) Earth Awards.

The CCF Earth Awards recognise excellence in civil construction, with the winners of the awards in each state progressing to an annual awards ceremony later in the year.

The selection of Interflow’s rehabilitation of a Unitywater sewerage pipeline in Alexandra Headland recognises the project for its efficient approach and successful outcome.

The rehabilitation involved relining six lengths of DN 450 using SPR™ EX-Expanda liner, with one access chamber raised and eight access chambers cleaned using a Recycler before being coated.

To further reduce cartage and use of water, several cleaning dingos were strategically positioned along the line.

In conjunction with Interflow’s Kubota, the dingos were arranged using a 100 t crane to carry out the works.

Given the sewers and access chambers were located parallel to the shoreline and on steep rocky ground, the team arranged for on-foot crew access and equipment was crane-delivered to the chambers.

The coating and sewer relining were undertaken in tandem to take advantage of the arranged closures and council permits.

Interflow’s Project Manager – Northern Division Shaun Corrie said the project wouldn’t have been possible without trenchless technology.

“Due to the environmentally sensitive nature of the Alexandra Headland foreshore area, a trenchless solution for Unitywater was a must,” he said.

“While the pipeline was situated in a busy council parkland area, Interflow and Unitywater worked with council in seeking approval to undertake the works, ensuring relevant site conditions and requirements were met.

“As a result, we were able to deliver the project on time, within budget, with minimal disruption to the public, and no environmental impact.”

The project team, who conducted recon on the beach.

In consultation with multiple stakeholders, Interflow identified optimal relining methodology, prevented community disruption, controlled site hazards and reduced environmental impacts.

Interflow Business Development Manager John Phillips said, “It pleases me greatly that we were able to assist Unitywater in delivering this difficult-to-access, environmentally sensitive, high-risk project.

“The successful delivery of this project gave us an opportunity to demonstrate our core principle of continually challenging the status quo for our valued customer.”

The winners of the CCF QLD Earth Awards will be announced at an event on the Gold Coast on 23 August.

For more information visit the Interflow website.

If you have a project you would like featured in Trenchless Australasia contact Managing Editor Chloe Jenkins at

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