Unitywater Manager Network Projects Ashley Massie said “This program includes a CCTV camera assessment of our sewer network, relining targeted pipelines, and rehabilitating the surface walls of our existing manholes,” Mr Massie said.

The host pipes are of various material types, including polyvinyl chloride, vitrified clay or earthen ware, concrete and asbestos cement, with approximately 11.5 km of pipes currently being relined.

A Unitywater spokesperson told Trenchless Australasia that the pipes vary in age as they were constructed between 1963–2000.

The companies contracted to perform the works are Kembla Watertech and Interflow.

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The Sewer Relining Program is an ongoing annual program to improve the condition of Unitywater’s sewer pipes and manholes. Unitywater currently has a three year contract, with packages of work issued within each financial year.

Mr Massie said “Using Trenchless Technology, this no-dig, cost-saving pipe renewal process will help prolong the life of our sewer network, defer the need for expensive infrastructure upgrades and minimise any inconvenience to our customers.

“Relining pipes and rehabilitating manholes also helps protect the environment and public health by reducing the amount of groundwater infiltration entering the sewer via pipeline cracks or faulty joints, allowing us to better manage sewage flows, especially in times of extreme wet weather,” he said.

Contractors will be carrying out sewer renewal works in the following areas: Moreton Bay - Redcliffe, Kippa-Ring, Margate, Woorim and Scarborough. Sunshine Coast - Marcoola, Wurtulla, Coolum Beach, Mount Coolum, Palmwoods, Maroochydore, Mooloolaba, Alexandra Headland, Mountain Creek, Buderim, Bli Bli and Nambour.