TORRÃO DAM |
|
PURPOSE - Hydroelectric | |
LOCATION | GENERAL FEATURES |
District -
Porto Municipality - Marco de Canavezes Site - Torrão/Alpendurada River Basin - Douro River - Tâmega river |
Promoting entity
- CPPE, Cª. Portuguesa de Produção de Electricidade, SA Owner - CPPE Engineering by - EDP Construction by - Mota & Companhia/Conduril Project year - 1979 Year of completion - 1988 |
HYDROLOGY | RESERVOIR |
River basin area
- 3252,1 km2 Mean annual rainfall - 1273 mm Mean annual runoff - 2 110 800 x 1000 m3 Flood runoff - 4150 m3/s Return period - 500 years |
Reservoir area
- 6 500 x 1 000 m2 Gross capacity - 124 000 x 1 000 m3 Effective storage- 77 000 x 1 000 m3 Dead storage - 47 000 x 1 000 m3 Normal water level (NWL) - 65 m Maximum flood level (MFL) - 65 m Minimum operating level - 49 m |
DAM | |
Concrete - Gravity
dam, lightened by large hollows Height above foundation - 69 m Crest elevation - 69 m Crest length - 218 m Crest width - 8,35 m Foundation - Granite Volume of dam body - 224,415 x 1 000 m3 |
|
SPILLWAY | BOTTOM OUTLET |
Location - Dam
body Control type - Controlled Spillway type - Over the dam Sill elevation - 54,4 m Sill length - 53,50 m Number of gates - 5 Maximum discharge - 4500 m3/s Energy dissipation - Hydraulic jump |
Location -
Thalweg Type - Through the dam Section - 2x4,91=9,82m2 Maximum discharge - 250 m3/s Upstream control - No Downstream control - Yes |
POWER PLANT | |
Type - Underground Number of installed units - 2 Type of units - Turbine/Pump Power installed capacity - 146 MW Mean annual energy output - 228 GWh |