A week-long hearing in the Resource Management and Planning Appeals Tribunal into the Lake Malbena proposal has been adjourned until August 8.

Wilderness Society campaign manager Tom Allen said the society was looking forward to the hearing resuming.

"We are happy with how the hearing proceeded,' Mr Allen said.

"The hearing will resume on August 8-9 to hear further evidence about wedge-tailed eagles and for the legal representatives to present submissions on how the tribunal should make its decision having regard to the evidence before it.

"Submissions will be made by our barrister Juliet Forsyth SC with lawyers from the Environmental Defenders Office of Tasmania, and by counsel for the Attorney General, the Director of the Parks and Wildlife Service, the Council and the proponent.

"The Tribunal's decision is likely to be handed down in early September."

The Central Highlands Council voted to reject the proposal in February and proponents Daniel and Simone Hackett, appealed to RMPAT.