Both measures should have measurable positive effects on the longevity of this field. At Ngawha the low heat content and high dissolved solids inhibit power production. Nevertheless plans are to install 8 MWe by 1997 and 16 MWe in a second devlopment stage. Fluid chemistry is similar to that at Wairaki, but with more gas, silica and chloride. A proposal to build two 50 MWe plants is awaiting resolution of resource ownership issues.
Development there is almost certain when all permits are granted.
The time spent on domestic and overseas geothermal projects by New Zealand's professional geothermists was about 69 man-years in 1990 and 1991. Small private power companies are expected to fill the need for new power. Steps taken to optimize steam field management are expected to streamline geothermal development and maximize its cost-effective utilisation.