One Tree Sinkhole

Location: Mt Gambier
State: SA
Max Depth: 50mtrs
Average Depth: 35mtrs
Average Visibility: 25mtrs
CDAA Certification: Sinkhole
Access Type: CDAA Card
Site Owner: Peter Norman
Access Info: The landowner is Peter Norman, knock on his back door, or call him, to get the gate key. He will require to see your CDAA card, and sometimes asks for logbooks also.

Nearest Airfills: Mt Gambier
Directions: 500 metres from Little Blue, Look for the lone tree sitting in the middle of the paddock

Description: There is a pretty full-on thermocline at 20 metres, very milky above it, but underneath, crystal clear. Its a fairly large sinkhole, with lots of rubbish, including a harvester, upside down car, amongst other things as well...

There is also a fairly large swim-through under one of the undercuts.

Access is via a fairly steep ramp, which can be slippery when wet. If its really slippery, using a rope to help climb out would be advisable.