Rehabilitation – Sewer and Stormwater – HMAS Albatross

Project Summary Sheet

Customer: CPB Contractors

Location: HMAS Albatross, NSW

Delivered: October, 2015

The Challenge

HMAS Albatross in southern NSW required structural rehabilitations to both its sewer and stormwater services. The lines varied in size with the mains ranging from DN150 to DN750. The facilities were updated throughout the base including sections along the active airfield. For HMAS Albatross it was imperative that that works be completed without disruptions to the active fly zones at the base for arriving and departing aircraft.

The Solution

Interflow, after reviewing CCTV of all the services, proposed a variety of solutions to complete the rehabilitation. For the structural lining of both sewer and stormwater mains, SPR™ EX – Expanda was recommended. Interfits were required to reconnect lateral services and Interpatches installed to renew sections that did not require complete lining. In addition to the lining, a number of lines were replaced by pipe bursting and 150 maintenance holes had varying levels of rehabilitation work to improve their performance and longevity.

The Project

Completing the rehabilitation works at an active naval air base required considerable planning and interaction between operations and air traffic control.

As sections of the lining work ran parallel to the runway, Interflow’s crews were supervised by Defence Force personnel who maintained constant communication with air traffic control to ensure work being undertaken did not interfere with arriving or departing aircraft. In the event that the Interflow crew needed to evacuate the area, they were given 30 minutes to stop work, pack up and exit the site. This was a unique component to this project which required meticulous planning for all involved.

In October 2015 Interflow had completed both the sewer and stormwater renewals at HMAS Albatross. At the completion of the sewer works; 6.3 kilometres of DN150 and DN225 were relined collectively, three lines replaced by pipe bursting, 73 Interfits were used in lateral reconnections and 34 Interpatches were installed in sewer lines which did not warrant full relining.

The stormwater service had 575 metres of DN750 relined and grouted, eight Interfits installed to reconnect lateral services and 13 Interpatches were used for minor rehabilitations.

Conclusion

Interflow was able to meet the timelines imposed to complete the project as well as ensuring their operations did not interfere with activities on the base. The project saw all assets rehabilitated to ensure that the project was completed in full and all services were reviewed and upgraded where appropriate. As a result of these works, Interflow has extended the service life of the sewer and stormwater services at HMAS Albatross.

Interflow is committed to offering its customers customised solutions of the highest value for pipeline rehabilitation.