Elevated water flows continue to be released from Lake Manapouri into the Lower Waiau River by hydro energy generator Meridian, despite a State of Emergency being in force at the river's mouth - Bluecliffs.

Heavy rainfall into the river's other downstream tributaries is also contributing to higher river levels.

Southland District (SDC) Mayor Rob Scott declared a local state of emergency at Bluecliffs at 10.50am on the 8th February, after heavy rain and sea swells increased erosion and threatened houses and a landfill in the small coastal community.

Recent water flow levels through the Manapouri Structure Tailwater peaked in the first week of February. Graph: Environment Southland

The current outlet flow levels are due to higher lake levels after recent rain and the Manapōuri Power Station, which is currently operating with just 57% of its generators.

Meridian Energy General Manager Development , Guy Waipara, said the Manapōuri Power Station was operating to the maximum available capacity, to push as much water as possible through the station.

"We currently have three of our seven units out for critical maintenance."

"These will be returned to service once repair work is complete," Waipara said. 

Waipara said they were working to support the Southland District Council and Environment Southland in finding a solution to address the immediate risks to the Bluecliffs settlement.

"What we’re dealing with at Bluecliffs is coastal erosion, as seen elsewhere around New Zealand a result of climate change, compounded by recent weather events."

"Any works they undertake at the mouth of the river will require us to manage flows to ensure these works are completed safely and effectively," Waipara said.