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Porma and Ferreras hydroelectric power stations

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Centrales hidroeléctricas de Porma y Ferreras Centrales hidroeléctricas de Porma y Ferreras
Centrales hidroeléctricas de Porma y Ferreras
Centrales hidroeléctricas de Porma y Ferreras
  • Client: IDAE (NATURENER)
  • Country: Spain
  • Start date: 2000
  • Ending date: 2004
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Porma and Ferreras hydroelectric power stations (Juan Benet reservoir, León, Spain). 

The Juan Benet dam, named after the famous writer and engineer who participated in its construction, is located on the river Porma (tributary of the Esla) and has been in operation since 1968. Hydroelectric electricity is generated by two power stations: that of Ferreras, which is located at the far end of the reservoir and makes use of a 52 m drop with flows transferred via a tunnel from the river Curueño, and that of Porma located at the foot of the dam. The total power obtained from the two power stations is over 25 MW.

To construct Porma power station’s pressure pipes a hole 4 metres in diameter and 35 metres in length is made into the body of the Juan Benet dam. This is one of the most delicate operations both in the project design phase and in the execution of works. The total length of the pressure pipe is 225 metres and makes use of a sheer 70 m drop and of a maximum turbinable flow of 30 m3/s. Hydro turbines supplied by ALSTOM.

The power station’s end user is the company NATURENER. It benefited from the collaboration of the Institute for the Diversification and Saving of Energy (IDAE), institution reporting to the Ministry of Science and Technology. IDEA contracted SENER to carry out the project’s engineering, the execution and start up of the Porma and Ferreras Hydroelectric Power Stations and to carry out the detail engineering, purchases management and optional construction management and commissioning of the power stations.

  • PROject data:
  • 23 MW hydro plant, including existing dam drill (35 m length, 4 m diameter)
  • Pressure conduction 400 m length.
  • Hydro turbines supplied by ALSTOM.
  • Contract type: EPCM.
  • Scope: Basic Detail Engineering and management of procurement and construction.

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