Harvey River and Mayfield Drain Bridges for the Kwinana Freeway extension. The project was undertaken by Forge Group with the Managing Director of Allied Projects appointed as the Project Manager. The scope of work included the construction of five insitu bridges as part of the 70.5km Kwinana Freeway extension by the Southern Gateway Alliance. Two Bridges were constructed across the Harvey River, each 60m in length, and three Bridges across the Mayfield Drain, each 35m in length. The scope included earthworks and reinforced concrete construction for 10 abutments with wing walls, piers and pile caps. Install of 24 precast deck slabs using heavy lift cranes for the 105 ton lift. Formwork erection, steel reinforcement placing and fixing, pouring and finishing bridge deck topping concrete.