Sewer Mains Renewal

Project Summary Sheet

Location: Paraburdoo, WA

Delivered: October 2018

The Challenge

Paraburdoo, one of several towns that service the client’s iron ore mines in the Pilbara region of Western Australia, is some 1,500 kilometres north of the State capital of Perth, and 426 kilometres from the nearest major town of Karratha. The client owns and maintains Paraburdoo’s infrastructure which services its 1,600 residents.

The remoteness means that specialist pipeline renewal work must be reliable and long lasting. It must be trusted to a contractor who inspires confidence in what they offer.

The Solution

The client’s team members invested substantial effort in evaluating the optimum pipeline renewal technology as well as the provider prior to awarding the contract for the works.

Sewer renewal projects being undertaken by Interflow for the Water Corporation in Perth were inspected and
assessed for quality, effectiveness and safety standards.

Interflow could also point to experience of working for mining companies in remote parts of Western Australia, including structural renewal of deteriorated culverts under rail lines – an important consideration for this project.

The Project

The remoteness of the site meant that meticulous planning was required to ensure the project’s success.

Sufficient equipment, materials and spares needed for the entire project were loaded onto work vehicles for the two-day trip to Paraburdoo. All had to be made compliant with mine site specifications prior to setting off.

Sewer cleaning was needed before lining work commenced, and CCTV inspection before and after lining. The project involved structural lining of some 2.3 kilometres of sewers with SPR EX – Expanda Pipe spiral wound liners, re-connecting 132 houses and sealing of 128 of those connections with Interflow’s Interfit junction seal.

The work was carried out over a single four-week period, being completed in early November – prior to the arrival of the wet season and high summer temperatures. Nevertheless, the crew experienced daytime temperatures up to 40º, with precautions needing to be taken in those conditions.

Successful progress on the project persuaded the client to expand its scope, meaning another spool of SPR EX – Expanda Pipe lining profile was needed to be brought from Perth to line additional sewers.


The experience and dedication of the work crews in difficult conditions, combined with the careful pre-commencement planning, meant that this project was completed within a tight time frame, without cost variations. The works caused no disruption to the community, with minimal noise or dust.

The same solutions are being considered for other towns in the Pilbara.