1984/1986

Access tunnel to the Alto Lindoso underground power station

Location: Alto Lindoso, Portugal

General Description:

1,780 m long tunnel with 60 m2 section, excavated in rock, completed with a 160 m long access tunnel with 57 m2 section to the valve chamber, 360 m long access tunnel with 53 m2 section to the outlet branches; 170 m long access tunnel with 38 m2 section downstream to the dam, all concrete lined.

Key Statistics:

  • Rock excavation: 153,000 m3;
  • Concrete lining: 43,600 m3.

Project Commissioner: EDP – Electricidade de Portugal, S.A.

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