Planning Minister Justin Madden, who will release the major document, has praised the environmental and economic benefits associated with the project.

Santos is proposing to build a 1500-megawatt gas-fired power station in three stages near Orford .

"It is envisaged that the power station will produce up to 70 per cent less carbon emissions and use less water compared with traditional wet cooled brown-coal-fired power stations," he said.

"The project also has the potential to create a peak construction workforce of about 600 jobs during stage one and approximately 85 full-time ongoing operational jobs."

Mr Madden said Santos' proposal included a high-pressure, 100km gas pipeline to Port Campbell and a 28 km water pipeline from the Port Fairy reclamation plant.

"The EES takes into account the potential impacts associated with the construction of these pipelines on flora and fauna, waterways and Aboriginal heritage," Mr Madden said.

"An EES is required because of the potential impacts of the power station and associated gas pipeline on air emissions, residential amenity and environmental values along the pipeline route.

"These issues have been carefully and comprehensively detailed in the EES which provide a sound basis for public review and will inform my assessment of the project's environmental effects and merits."

The Environmental Effects Statement is on display until April 27 at: Department of Planning and Community Development, Barwon South West Region, Warrnambool Office ; Moyne Shire Council ; Corangamite Shire Council or the department website.