Department of Lands, Planning and Heritage, Government of Western Australia.
Large talus filled main passage south-west from doline leads to two lakes, one large and one small. 100 metre long sump at end of 150 metre long large lake leads to a further dome-shaped airspace and submerged passages beyond. Main sump has a large offshoot to the south-east over 150 metres long. Smaller lake reaches 28 metres depth.