If you consider today the story about the Botany upgrade for rail then shareholders for Portland should be keen to look seriously at container handling at the port. What would really be stopping them?
It's been mentioned in several posts elsewhere - there is insufficient land available at Portland to allow the establishment of a container port.
What is the demand for containers in and out of Portland? Not guesswork, actual figures please.
How many ship visits per annum would this generate? Again no guess work/build it and they will come nonsense, actual figures please.
The money allocated to Botany will do little more than solve current congestion issues - the place is an operational nightmare at the moment.