Design
Mooney Mooney Bridge was built by Enpro Constructions out of prestressed concrete. It has three spans. The span at the western end of the bridge is 135 metres long, the main span is 220 m (722 ft) long and the eastern span is 131 m (430 ft) long.
The design has been said to demonstrate how good engineering design and good aesthetics are synonymous, and has been used as a standard in the design of bridges throughout New South Wales. They employ a two rail parapet which optimises views of the landscape. The bridges were designed with the natural surroundings in mind and form a simple uncluttered shape so not to detract from the natural bushland of the National Park. The three span haunched girders on the bridge were critical to this as were the multiple piers that provide character and strength.
The bridge is the second crossing of the creek in the area, with the original two lane truss bridge that still services Pacific Highway traffic not far downstream of the modern bridge.
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