Hi mate,
I used to fish that dam way back and heaps of success on the purple, yellow/black Eddy dambuster lures. Good for 5 metres and a big wide sway.
Bigger Predatek deep diver lures in the same colours would work ok too.
Too many lures to choose from these days but I figure most of the cod you will catch will be in 2 to 6 metres of water(daytime)
And lures from 75mm to 150mm will catch most size ranges of cod.
Like most fish, stealth is the key.
Cheers, steve