Tamega Electrical Power Production System

The Tamega electrical power production system is made up of two dams located on the Tamega river (Daivoes and Alto Tamega) and a third on the Torno river (Gouvaes).

Description of the work:

Daivoes: Typology: Gravity dam. Height: 78 m, Installed Power: 118 MW, Forced Galleries 2 units x Ø5.6 m - Length 280/290 m, Concrete Volume: 240,000 m3, Crest Length: 265 m. River Diversion Tunnel: 384 m.

Alto Tamega: Typology:  Vault dam Height: 107 m, Installed Power: 160 MW, Forced Galleries: 2 units x Ø4.6 m - Length 50/50 m, Concrete Volume: 220,000 m3, Crest Length: 335 m. River Diversion Tunnel: 260 m.

Gouvaes: Typology:  Gravity dam Height: 30 m, Installed Power: 880 MW, Galleries and Suction Tunnel: 4 units x Ø3,8 m + 1 unit x Ø7,3 m - Length: 813 m, Forced Galleries: 1 unit x Ø6 m + 1 unit x Ø5,4 m + 2 units x Ø3,8 m + 4 units x Ø2,8 m - Length 2.154 m,  Concrete Level: 40,000 m3, Crest Length: 232 m. 

Work Carried Out:

 

• Formwork work, with our own personnel and formwork.
• Constructive proposal, with self-engineered calculation and design.
• Concreting work.
• Passive steel supply, manufacturing, and assembly.

Specifically, the following work has been carried out in each area of the complex: 

• Daivoes:  
• Execution of the Intake and Complete Dam Body (240,000m3).
• Execution of the river diversion tunnel (384 m). 
• Execution of the buffer basin (41,000 m3).
• Forced galleries (2 units x Ø5.6m - Length 280/290 m).
• Gouvaes:  
• Execution of the Intake and Complete Dam Body (40,000m3). 
• Galleries and suction tunnel: 4 units x Ø3,8 m + 1 unit x Ø7,3 m - Length: 813 m.
• Forced Galleries: 1 unit x Ø6 m + 1 unit x Ø5.4 m + 2 units x Ø3.8 m + 4 units x Ø2.8 m - Length 2,154 m.
• Alto Tamega:    
• Construction of the river diversion tunnel from the Alto Tamega Dam (260 m).