The Nevis River hearing will resume in Dunedin on August 24 and 25.
A special tribunal has been appointed by the Ministry for the Environment to determine whether hydro development on the Nevis River should be banned, or whether the status quo should remain, which would leave the option open for dams on the river.
The hearing began at Cromwell in mid-May and adjourned on June 12, after the tribunal heard evidence from about 60 witnesses.
It will continue for two days next month with evidence from more expert witnesses as well as the summing up by counsel for the main parties.
The New Zealand and Otago Fish and Game Councils have sought a change to the existing Water Conservation Order, asking for a ban on damming the Nevis River, along with conditions on minimum flows.
Pioneer Generation has plans for hydro development on the river, and it has opposed any changes to the existing order.
TrustPower and Contact Energy have also opposed any changes.
The application attracted 248 submissions, most against dams being allowed on the river.
