FREIGIL DAM |
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| PURPOSE - Hydroelectric | |
| LOCATION | GENERAL FEATURES |
| Distritct -
Viseu Municipality - Cinfães Site - Fojo River basin - Douro River - Cabrum river |
Promoting entity
- HDN, Energia do Norte, SA Owner (RSB) - HDN Engineering by - EDP - DOEH Construction by - ENSUL Project year - 1925 Year of completion - 1955 |
| HYDROLOGY | RESERVOIR |
| River basin area
- 54 km2 Mean annual rainfall - 2267 mm Flood runoff - 400 m3/s Return period - 1000 years |
Reservoir area -
33 x 1000m2 Gross capacity - 140 x 1000m3 Effective storage - 138 x 1000m3 Normal water level (NWL) - 317 m |
| DAM FEATURES | |
| Concrete - Gravity
dam Height above foundation - 17 m Crest elevation - 319,7 m Crest length - 73 m Crest width - 1,6 m Foundation - Diorite |
|
| SPILLWAY | BOTTOM OUTLET |
| Location - Dam
body Control type - Uncontrolled Spillway type - Over dam body Sill elevation - 317 m Sill length - 54,8 m Maximum discharge capacity - 400 m3/s Energy dissipation - Hydraulic jump |
Location - Thalweg Type - Through the dam Section - 0,8 x 0,8m Upstream control - Gate |
| POWER PLANT | |
| Type -
Reservoir - Outdoor Number of installed units - 1 Type of units - Francis Power installed capacity - 4,6 MW Mean annual energy output - 10,3 GWh |
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