At a Glance
The Patea Scheme began producing power in 1984. The dam was the first to be built in New Zealand using tertiary sandstone and siltstone as fill materials. Behind the dam, Lake Rotorangi is approximately 46 kilometres long.
The Scheme has three vertical Francis turbine and generator sets and one residual flow generator. Total capacity is 32 MW and the average annual output is 108 GWh.
Environment and recreation
There’s a significant Longfin Eel fishery upstream and downstream of Patea Dam. There’s no fish pass, so we fund an active trap and transfer programme. We also time the spillway gate operations to assist downstream migration of eels.
Please refer to the attached Hazard Maps below, which show the Lake's areas hazardous for boating. These maps identify areas of shallow water depth and submerged hazards considered dangerous to recreational lake users during times of low lake levels. This survey was undertaken in 2011, as required by Trustpower's resource consent.
Lake Rotorangi Hazard Map 1
Lake Rotorangi Hazard Map 2
New Resource Consents for the Patea Scheme were gained in 2008 and will expire in the year 2040.
Patea Lake Level
Please click here to view Patea Lake levels.