Illawong sinkhole

Legacy · 16 Jun 2015, 1:35 am

I know now they reckon that its all about leeching of soil after rain into an underground carpark for the block of units.
And I know that the base under illawong is sandstone, so cave formations could pretty much be ruled out as a cause even before investigating...

But did anyone else get a little excited when hearing that we had a new sinkhole?

phytrix · 17 Jun 2015, 1:02 pm

Based on its size (being somewhat circular) and the fact that it's built upon a heavy residential area, it was unlikely/impossible from the get-go. It's a new enough area that developers will realise they are building upon soft limestone bedrock and adjust their plans accordingly. Always hopeful, though.

On the topic of sinkholes though, I've got a trip to Ewen's Ponds planned for late this year, which should be awesome. I just need to invest in/borrow some photography equipment that will be appropriate.

Legacy · 17 Jun 2015, 10:51 pm

ooh... had never heard of them... but interested now..

when i first heard about this one on the radio is was just "a sinkhole has opened up in sydney" ... no descriptions beyond that....
hence the "yes"...

phytrix · 18 Jun 2015, 1:01 am

Legacy wrote:ooh... had never heard of them... but interested now..

when i first heard about this one on the radio is was just "a sinkhole has opened up in sydney" ... no descriptions beyond that....
hence the "yes"...

Ah fair enough then. I saw it on the news, with images and all, so I was like "d'aw"