The world first ‘planning authority approved’ surfing reef enhancement was at Burkitts Reef, Bargara, near Bundaberg.
In early 1997 a band of energetic locals waited until low tide to smash some existing basalt boulders into shape with an industrial-size excavator.
They then moulded a reef of their own making producing an acceptable though smallish wave at high tide.
There was a talk on this at 7th surfingramps.com.au/SurfingSymposium
..but the notes are not on the Symposium site.