Clicked a link to this ABC (America) story:
View attachment 54283
My first thought was that it's a huge, almost perfectly elliptical hole, and that they had sensibly marked it with a big white warning triangle.
Then I realised that it is a video...
Odd they just found a sinkhole when the entire runway is
sinking into a swamp (from 1967). Four inches a year, back then!
My question is what is the excavator for? Not getting through pavement with it. Dumping stone? Rather just get some flowable LSM, fill the hole, of course, after finding out why there is nothing under the pavement there.