MIRANDA DAM |
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| PURPOSE - Hydroelectric | |
| LOCATION | GENERAL FEATURES |
| District -
Bragança Municipality - Miranda do Douro Site - Miranda do Douro River Basin - Douro River - Douro river |
Promoting entity
- CPPE, Cª. Portuguesa de Produção de Electricidade, SA Owner - CPPE Engineering by - Hidro Eléctrica do Douro Construction by - ETELI Project year - 1955 Year of completion - 1961 |
| HYDROLOGY | RESERVOIR |
| River basin area
- 63100 km2 Mean annual rainfall - 577 mm Mean annual runoff - 3453 x 1000 m3 Flood runoff - 11 000 m3/s Return period - 1000 years |
Reservoir area
- 1220 x 1000m2 Gross capacity - 28100 x 1000m3 Effective storage - 6660 x 1000m3 Normal water level (NWL) - 528,05 m Maximum flood level (MFL) - 533 m |
| DAM | |
| Type -
Concrete, buttress dam Height above foundation - 80 m Height above streambed - Crest elevation - 535 m Crest length - 263 m Foundation - Schist and granite Volume of dam body - 240 x 1000 m3 |
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| SPILLWAY | BOTTOM OUTLET |
| Location - Dam
body Control type - Controlled Spillway type - Over the dam Sill elevation - 520 m Sill length - 4 x 24=96 m Number of gates - 4 radial gates Maximum discharge - 11 000 m3/s Energy dissipation - Stilling basin |
Location -
Thalweg Type - Through the dam Section - 2,5 m Upstream control - No Downstream control - yes Energy dissipation - Stilling basin |
| POWER PLANT | |
| Type - Underground
run-of-river power station Number of installed units - 4 Type of units - Francis Power installed capacity - 390 MW Mean annual energy output - 1036,3 GWh |
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