Landsvirkjun

Laxá Power Station III

The Laxá III Station is the most recent power station in the river Laxá. The underground vault housing the station’s turbine unit was initially designed for two 25 MW turbines. The plans called for the construction of a 56 m high dam in the upper part of the canyon, making the total head 83 m. The local population of Þingeyjar strongly protested the plan. The Laxá III Hydropower Station was inaugurated in 1973 with one turbine instead of two, and further plans for the region were shelved.

13,5 MW
Hydropower
13,5 MW
135 MW
13,5 MW
Installed capacity
1 x 13,5 MW
1 Francis turbines
92 GWh p.a.
Generation capacity
39 m
Total head
1973
Brought online

Catchment Area

Laxá Stations

The three Laxá Stations harness a 70 m head on an 1800 m strecth of River Laxá to produce a total of 27.5 MW of electricity. The inflow to Lake Mývatn is mostly underground, through layers of lava, largely immune from seasonal fluctuations and ideal for harnessing hydropower.

Laxá I and II are low head hydro stations that harness the natural flow of River Laxá. Station III, the latest addition, utilizes the same head as Laxá I but runs its water through a tunnel to the power station, 60 metres inside the rock. The town of Akureyri and the Icelandic Government built the Laxá Stations which joined Landsvirkjun in 1983.

Specifications

Vatnasvið: 1.550 km2
Meðalrennsli til virkjana: 43 m3/s
Fallhæð
Laxá I: 39 m
Laxá II: 29 m
Laxá III: 39 m
Afl
Laxá I: 5 MW
Laxá II: 9 MW
Laxá III: 13,5 MW
Orkuframleiðsla: 180 GWst á ári
Lengd jarðganga í Laxá III
Vatnsvegir: 850 m
Þjónustugöng: 190 m
Hönnun
Laxá I: Árni Pálsson, verkfræðingur
Laxá II og III: Verkfræðistofa Sigurðar Thoroddsen hf.
Helstu verktakar
Laxá I: Højgaard og Schultz, Danmörku
Laxá II: Stoð hf. (Laxá II)
Laxá III: Norðurverk haf. (Laxá III)
Framleiðendur hverfla og rafala
Laxá I, vél 1: Kværner Brug, Noregi (hverfill)
  A/s Titan, Danmörku (rafali)
Laxá I, vél 2: James Leffel & Co, Bandaríkjunum (hverfill)
  Westinghouse, Bandaríkjunum (rafali)
Laxá II: James Leffel & Co, Bandaríkjunum (hverfill)
  Westinghouse, Bandaríkjunum (rafali)
Laxá III: Escher Wyss, Þýskalandi (hverfill)
  ASEA, Svíðþjóð (rafali