23 December 2016
Results are in from early geotechnical engineering investigations as part of the Victorian Government's $9.8 million Shipwreck Coast Masterplan Stage 1 funding for the Port Campbell National Park.
Engineers worked with a drilling rig in October and November to drill through the limestone cliffs at the Twelve Apostles and the Blowhole near Loch Ard Gorge down to the base of the cliffs at sea level. The drilling rig was also used to investigate the sub surface ground conditions at the proposed site for the new Port Campbell pedestrian bridge over Campbell's Creek.
Drilling through the cliff rock and along Campbell's Creek was designed to give Parks Victoria's engineers greater confidence in the infrastructure task ahead.
Parks Victoria's District Manager West Coast, Dale Antonysen, said:
"We're building visitor infrastructure - two new viewing platforms and a bridge - which need to last for decades to come – this means we need expert advice about the dynamic limestone cliffs we are working on. It was fascinating to discover that the drilling rig sampling at Castle Rock and the Blowhole found loose shaley heterogeneous rock. All the way down to 45 metres below ground the drill didn't reach solid rock."
"This means that the footprint for the lookouts will need to be designed to respond to the challenging geotechnical conditions and provide a sustainable improved view for visitors for decades to come."
"Geotechnical investigations along the Port Campbell Creek found suitable conditions below the surface which is good news for future design planning for the promised Port Campbell bridge. We see the bridge as a partnership between Parks Victoria, the Port Campbell Progress Association and the Port Campbell community and look forward to developing the details for the bridge design and build together."
Parks Victoria is finalising the details for a community information session in Port Campbell early next year on the infrastructure works.