FURADOURO DAM

PURPOSE - Irrigation
LOCATION GENERAL FEATURES
District - Santarém
Municipality - Coruche
Site - Furadouro
River Basin - Tejo
River - Raia river
Promoting entity - INAG
Owner (RSB) - Associação de Regantes e Beneficiários do Vale do Sorraia
Engineering by - DGSH
Construction by - Engº Firmino Gonçalves Costa
Project year - 1956
Year of completion - 1959
HYDROLOGY RESERVOIR
River basin area - 3374 km2
Mean annual rainfall - 660 mm
Flood runoff - 2900 m3/s
Return period - 500 years
Reservoir area - 36 x 1000m2
Effective storage - 400 x 1000m3
Normal water level (NWL) - 42,5 m
Maximum flood level (MFL) - 46,5 m
Minimum operating level (MOL) - 40 m
DAM
Earthfill  - Homogeneous embankment
Concrete - Gravity
Composite dam - Yes
Height above foundation - 17 m
Height above streambed - 14 m
Crest elevation - 48,4 m
Crest length - 279m
Crest width - 3,5 m
Foundation - Gneisseous granite
Earthfill volume - 2 x 1000 m3
Concrete volume - 16,5 x 1000 m3
SPILLWAY BOTTOM OUTLET
Location - Left bank
Control type - Uncontrolled
Spillway type - Over the dam
Sill elevation - 42,5 m
Sill length - 15 x 9 m
Maximum discharge - 2300 m3/s
Energy dissipation - Deflector hood
Location - Thalweg
Type - Through the dam
Section - d 1,0 m
Maximum discharge - 5 m3/s
Upstream control - Emergency gate
Energy dissipation - Hydraulic jump


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