9 April 2021
Oxley Highway: multiple landslides in New South Wales, Australia
The Oxley Highway is a rural road orientated east-west in New South Wales, Australia. To the west is the town of Nevertire, to the east it terminates at Port Macquarie on the Tasman Sea coast.
Heavy rainfall in March triggered multiple landslides along the Oxley Highway in a section between Yarras and Walcha. This is the landscape of the section in question:-
There is a good helicopter reconnaissance video showing the magnitude of the damage caused by landslides to the highway, posted to Youtube:-
The level of damage is also clear in some of the images released by Transport for NSW:-
There are more than 70 landslide sites along the road. Transport for NSW has estimated that it will at least two months before the road can reopen with a limited service, and several more months at least before the problems are fully mitigated. As the two images directly above show, some of the landslides are both large and located below the level of the road bench. Remediating these sites will be a substantial and expensive challenge.
Meanwhile, also in Australia, 7 Daily News tweeted a video yesterday of a coastal landslide in Queensland:
Another sinkhole has opened up at Inskip Point, stripping chunks of sand away from the beach. It appeared after the recent deluge near where vehicles are loaded onto the barges to go to Fraser Island. Vid: Wayne Kerr. https://t.co/dSgFbiE9NM #7NEWS pic.twitter.com/7zmXEc5dhk
— 7NEWS Sunshine Coast (@7NewsSC) April 8, 2021
I have posted about these retrogressive landslides at Inskip Point previously. This is another example of a Retrogressive Breach Failure, not a sinkhole.