[1] The facility was expanded in 1970 with the addition of a 25.5 kilometres (15.8 mi) canal to take outflow water to Lake Pukaki and the Tekapo B Power Station.

[1] Just to the east is the artificially-created Lake George Scott, which is part of the diversion of additional lakewater from the Tekapo River into the canal.

When the lake level is high, gates can be opened to dump water back into the original bed of the river.

[2] Generated power is fed into the grid via an eastward 110 kilovolt overhead line to Timaru, managed by Transpower New Zealand.

An additional 33kV overhead line managed by Alpine Energy goes westward to feed Mount Cook Village.