Tekapo Power Scheme

The Tekapo Power Scheme has 2 power stations that utilise water fromLake Tekapo.

Tekapo A Power Station generates electricity from water that passes through a 1.4 kilometre tunnel from Lake Tekapo. The water then passes down the 26 kilometre Tekapo Canal and generates electricity through Tekapo B Power Station, located on the shores of Lake Pukaki.

River conditions can change very quickly, so the data is updated on this website every 15 minutes. Please monitor the conditions regularly before embarking on any water-based activities. Flow data is also available from the Genesis Energy flow phone 07 386 8113 or Free Phone number 0800 435 697 – (0800 4 flows).

If you have questions or comments you can contact Genesis Hydrology Staff.

Hydrology information for the Tekapo Power Scheme:

Supporting pest-free waterways
Supporting pest-free waterways

Lake level

Lake Tekapo is the main water source for Tekapo A and Tekapo B power stations.

Lake Tekapo runs north-south on the northern end of the Mackenzie Basin in the South Island.Lake Tekapo has a normal operating range from 701.8 metres above sea level (“masl”) to 710.9 masl; however, the minimum and maximum operating levels vary throughout the year. The current minimum operating level of Lake Tekapo is as follows:

  • 1 April and 30 September – Minimum Level of 701.8 masl; and
  • 1 October and 31 March – Minimum Level of 704.1 masl.*

The current maximum operating levels for Lake Tekapo are as follows:

  • September to February – Maximum Level of 709.7 masl;
  • March – Maximum Level of 710.0 masl;
  • April and August – Maximum Level of 710.3 masl; and
  • May - Maximum Level of 710.6 masl;
  • June and July – Maximum Level of 710.9 masl.

 *The level of Lake Tekapo may be further reduced to 701.8 masl between 1 October and 31 March if the Electricity Commission determines that reserve generation capacity is required.

Click on the site name to view recent lake level trends.

Lake George Scott – spill flow