The created reservoir, Sporðalda in the southeast of the mountain, with a surface of 7 km2 and a total capacity of 50 hm³, is backed up by two embankment dams.

The Búðarháls power house measures a size of around 66.800 m³ (55,400m x 31,05m x 38,84 m/ 26,54m underground), which contains two Kaplan turbines with a capacity of 47,5 MW each.

The drill and blast headrace tunnel, which is 4 km long, 11.3m wide and 14.7m high, provides the turbines and the power plant with water from the new created intake Sporðalda reservoir.

The power produced from the turbines is directed from the generator to the transformer, which is located in the front of the station; after that it is sent underground to the Landsnet substation and further to the Hrauneyjar line onto the National grid.

Digging operations were finished in September 2012 and by the end of 2013 the powerhouse and intake structure were completed and the Sporðalda reservoir filled.