Iwi are calling on Far North power company Top Energy to monitor Ngawha's hot springs and to foot the bill for a thermal pool upgrade if it gets permission to expand its nearby geothermal power plant.
Top Energy is applying for consents from the Northland Regional and Far North District councils to triple the output of its Ngawha power station, east of Kaikohe, from 25MW to 75MW. Hearings took place before a panel of commissioners last week in Kerikeri.
If the proposal goes ahead, it would make the Far North energy self-sufficient. The company says it could also create hundreds of jobs in industries attracted by cheap power and heat.
Ngawha's geothermal field, however, also feeds hot pools with considerable cultural significance to Ngapuhi.
On Thursday, representatives of the Parahirahi C1 Trust, which owns part of the land under the Ngawha Waiariki hot pool complex and has a claim on the rest, urged commissioners to refuse consents.