The New South Wales Planning Commission may change the way it assesses major mining projects, as complaints continue to pile up.

There has been particular controversy over the Wallarah Two underground coal project on the Central Coast, and the state’s Planning and Assessment Commission (PAC) may be ready to face more outrage with the release of its review.

The PAC has released its review of the mine proposal following public inquiries earlier this year.

The PAC’S own documents show the alleged benefits of the proposal, as calculated by the company seeking to undertake it, were not credible.

But the Commission has backed the development anyway, now subject to strict conditions.

The progress may be linked to the NSW Coalition's new mine planning policies, which highly prioritise the economic importance of resource projects.

The group says the seemingly-contradictory approval is in line with the rampant pursuit of economic benefits, but not with the actual purpose of the PAC.

The Commission says the Coalition policy makes it impossible to balance social and environmental factors with the new weight of economic benefits.

It adds to an increasing mound of negative sentiment about the level and style of economic analysis for NSW mining projects.

But it appears the Government is listening.

NSW Planning Minister, Pru Goward, says a senior figure in the Department of Planning and Environment will set up a new process to give separate economic analysis of future major mining projects.

With the independent Planning Assessment Commission now in agreeance with the Department of Planning and Environment, the project is free to face its next hurdle; a successful challenge mounted in the Land and Environment Court last week.

The Court is upholding the rights of the Darkinjung Aboriginal Land Council's to refuse access to a parcel of its land, which the miners need to proceed.

The Land Council has been given the power to decide whether it wants to return to the negotiating table over the issue.