McCosker was engaged by Sunwater to execute the installation of formwork, reinforcement and concrete placement across the Fairbairn Dam Ogee Crest, Spillway floors and Gravity walls. The project involved the removal of existing concrete within the spillway and placement of 20,000m³ of new concrete and 2,230 tonnes of steel reinforcement. McCosker was required to execute the works in accordance with the specified sequence approved by Sunwater and strict construction tolerances set down in the project specification. The project involved over 100,000 man hours completed LTI free.