| ARCOSSÓ DAM | |
| PURPOSE - Water supply | |
| LOCATION | GENERAL FEATURES |
| District -
Vila Real Municipality - Chaves Site - Curral das Vacas River Basin - Douro River - Arcossó river |
Promoting entity
- Direcção Regional de Agricultura de Trás-os-Montes Owner (RSB) - Associação de Regantes da Veiga de Chaves Engineering by - Hidroprojecto Construction by - CONDURIL Project year - 1991 Year of completion - 1999 |
| HYDROLOGY | RESERVOIR |
| River basin area
- 31,1 km2 Mean annual rainfall - 915,4 mm Mean annual runoff - 13720 x 1000 m3 Flood runoff - 113 m3/s Return period - 1000 years |
Reservoir area -
412 x 1000m2 Gross capacity - 4876 x 1000m3 Normal water level (NWL) - 537 m Maximum flood level (MFL) - 538,25 m |
| DAM | |
| Rockfill - Rockfill
with upstream facing Height above foundation - 40 m Crest elevation - 540 m Crest length - 315 m Crest width - 8 m Volume of dam body - 386,62 x 1000 m3 |
|
| SPILLWAY | BOTTOM OUTLET |
| Location - Left
bank Control type - Uncontrolled Spillway type - Chute spillway Sill elevation - 537 m Sill length - 35,40 m Maximum discharge - 85 m3/s Energy dissipation - Hydraulic jump |
Location -
Right bank Type - Conduit under the embankment Section - d 2,0 m Maximum discharge - 4,9 m3/s Upstream control - Sluice gate Downstream control - Hollow jet valve Energy dissipation - Hollow jet and scour hole |