NCS were awarded the contract to rehabilitate the 66m high concrete boiler stack at the Victoria Mill. Acting as principle contractor, NCS spent 5 months treating the internal and external surfaces of the stack to extend the service life for at least the next 20 years.

The initial challenge was to design and erect an external scaffold system which was capable of withstanding a potential Category 3 cyclone, as the work was to be undertaken in the cyclone season. After laser mapping the stack, a 3D model was produced, and a scaffold system designed and erected to allow safe access to the external surfaces of the stack. Internal access was made via a purposely designed swing stage system which allowed NCS Technicians safe access.

Due to the internal conditions found within the stack, the entire internal surface had to be prepared using ultra high-pressure water, and the external surfaces prepared using high-pressure water.

The project was completed on time, despite the arrival of cyclone Debbie, and through the use of specialised mortar, the stacks were set for a further 20 years of operation.