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History of Arias I
H.N.E. has held the concession to the hydroelectric operation of Arias I since 1973, for a maximum volume of flow of 40 m3/s.
The plant still houses a 700 KVA Alternator and turbine, manufactured in 1905. It is out of service but is being kept for reasons of historical interest.
Power plant facilities
The Arias I Plant is situated in the county of Somontano de Barbastro in Huesca, only 10 kilometres away from Barbastro and 100 from France