The South Australian government has drafted a contingency plan in case SkyCity abandons its AUD350 million Adelaide casino expansion.

On Tuesday, South Australian officials released its AUD220 million overhaul plan, prepared for the Adelaide Riverbank Authority board meeting on 27 July 2015, showing development options for the space to the north of the Adelaide Casino.

The concept development plans show a number of low-rise options for the area, which the government sees as a key part of its Festival Plaza redevelopment.

“If they [SkyCity] choose not to go ahead with it then we need to be ready to have a plan B and the only thing that’s unacceptable really in the medium term is for there to be no decision at all about that space,” said Planning Minister John Rau. “So I’d be encouraging the casino management to be making a decision as soon as possible.”