Mr Scully said the Illawarra Rail Resilience Plan, which was funded in the latest state budget, will examine the rail connection, but he does not know what the project would cost.
Six people have been charged in four days over a series of guerilla-style anti-coal protests that have caused days of rail disruptions across the Hunter region.
A $447 million injection to extend the life of the ageing Tangara train fleet will keep them on the tracks for another 12 years as the government investigates building replacements locally.