The Guardians of Lakes Manapouri, Monowai and Te Anau (the Guardians) will celebrate their 50th anniversary in May (2023).

Meridian Energy's underground power station at Manapouri. Photo: Supplied

The government appointed lakes protection group was established in 1973, after a planned rising of Lakes Manapouri and Te Anau for hydro-electric power generation was quashed by an incoming Norman Kirk-led Labour government.

The failed plan, which would have also seen vast tracts of Fiordland's native forest flooded and destroyed, fueled a major public backlash and the Save Manapouri Campaign.

The Guardians, now supported by the Conservation Act 1987, are tasked with ensuring the lakes remain in their natural state, free from any negative effects of hydro-electric power generation.  

Guardians representative Madeleine Peacock said the establishment of the Guardians had been an international master-class in how development and conservation could work together for mutually beneficial outcomes.

She said the anniversary was a significant event not only for the Guardians but for the environment that benefits from their protection, the local community who call these lakes home and all those who have fought for the protection of New Zealand’s environment over the years.

"The anniversary [would be] a time of reflection on the achievements of the Guardians over the past 50 years and acknowledgement of those who have given their energy, time and passion to maintain the gains made by the establishment of the group," Peacock said.

"It is also an opportunity to recognise the partnerships we have with Meridian Energy, Pioneer Energy and the Department of Conservation, as well as Te Runanga O Ngai Tahu who have representation on the Guardians."

"We also hope the community can learn more about our work,” Peacock said.

The Guardians will celebrate their anniversary with a weekend of events for past and current Guardians, which will include a tour of the Manapouri Power Station, a tree-planting ceremony, formal dinner and opportunity for the community to learn more about their ongoing work.

Peacock is the granddaughter of original Lakes Guardian, Sir Les Hutchins.