GFWAust provided microfine grouting to seal a groundwater leak into the structure

Sydney Water's SewerFix is an extensive program of activities that maintain and improve the operations of the existing sewage system. It is focused on improving the flow of sewage in pipes and reduce the amount of sewage escaping into the local environment, through cleaning and relining of pipes in priority areas around Sydney, the Blue Mountains and the Illawarra. The program also includes upgrading of 650 Sewage Pumping Stations to ensure there are no sewage overflows during dry weather.

Wentworth Falls SPS869 is one of the new pumping stations. The main sump was excavated through overlying sandy deposits into shale. GFWAust were asked by Sydney Water to stop water ingress along the shale horizon through the new concrete structure, This was achieved using microfine cement grout injected into the ground behind the concrete structure.