PRACANA DAM |
|
PURPOSE - Hydroelectric | |
LOCATION | GENERAL FEATURES |
District -
Santarém Municipality - Mação Site - Foz da Ribeira de Pracana River Basin - Tejo River - Ocreza river |
Promoting entity
- CPPE, Companhia Portuguesa de Produção de Electricidade, SA Owner - CPPE Engineering by - A, Stucky Construction by - SOLO Project year - 1947 Year of completion - 1950 |
HYDROLOGY | RESERVOIR |
River basin area
- 1 410 km2 Mean annual rainfall - 1 000 mm Mean annual runoff - 611 000 x 1000 m3 Flood runoff - 3 500 m3/s Return period - 1000 years |
Reservoir area
- 5 500 x 1 000m2 Gross capacity - 111 900 x 1 000m3 Effective storage - 69 000 x 1 000m3 Dead storage - 42 900 x 1 000m3 Normal water level (NWL) - 114 m Minimum operating level - 97 m |
DAM | |
Concrete -
Buttress dam Height above foundation - 60 m Crest elevation - 115 m Crest length - 245,5 m Foundation - Phyllite and greywacke Volume of dam body - 144 x 1 000 m3 |
|
SPILLWAY | BOTTOM OUTLET |
Location - In
both banks Control type - Controlled Spillway type - Shaft and chute spillway Sill elevation - 107 and 92,5 m Number of gates - 1 ccylinder and 1 radial Maximum discharge - 2 560 m3/s Energy dissipation - Hydraulic jump |
Location -
Thalweg Type - Through the dam Maximum discharge - 52 m3/s Upstream control - Sluice gate |
POWER PLANT | |
Type - Dam
toe Number of installed units - 3 Type of units - Francis turbine Power installed capacity - 40 MW Mean annual energy output - 61,8 GWh |