Millions more litres of water will be needed under plans to build a state-owned coal mine in central western New South Wales.
Cobbora Coal has adjusted its plans for an open cut mine near Dunedoo after receiving more than 200 submissions.
Many of the individuals and community groups oppose the project, while state and federal agencies want certain issues clarified.
The planning process is continuing despite legislation passing governing its operation and the sale of the state's power assets.
The company now wants to use more than 4000 megalitres each year, an increase of around 15 per cent.
Cobbora says the changes are 'unlikely to distort the water market'.
But it says it needs to buy another 900 megalitres worth of water licences to fulfil its requirements.
If approved, the mine will also cover a larger area.
The project had originally been intended to supply coal for state owned power generators, but its future is now caught up in the sale of New South Wales electricity assets.