The eastern (far) end is within South West National Park and the western end is within the Recherche Bay NatureRecreation Area. The bridge provides access to walking tracks, camping areas and the PWS staff accommodation, as well as only vehicle access to shacks/dwellings.
The existing 5-span timber structure was in poor condition, did not comply with current standards and in need of replacement. Aesthetic considerations were also an important factor due to location.
VEC was awarded the design and construct contract to replace this existing structure on the same alignment with a new 41m 3-span single lane concrete Bridge compliant with AS 5100 and a design life of 100 years. The design was based on a slim 600mm deep, 3 span precast concrete plank bridge. The structure was founded on dolerite bedrock, with a mixture on steel tube and UC piles.
Concrete elements were precast, with insitu concrete stitches completed on site. Due to the sensitive nature of the work area, the site was essentially confined to the existing alignment and approaches. To overcome this constraint, VEC commissioned a temporary work gantry to launch the 20tonne concrete planks incrementally over the 3 spans, and negate the need for heavy and expensive cranes on site, which would have required area outside the construction footprint. Additional to this was a white steel combination pedestrian/ traffic barrier, to reflect on the previous white timber barrier of the existing and meet the aesthetic considerations. The bridge was also designed to cater for future development in the way of a cantilevered pedestrian barrier.