SANTA CLARA DAM

PURPOSE - Irigation / Water supply / Hydroelectric /
/ Flood control
LOCATION GENERAL FEATURES
District - Beja
Municipality - Odemira
Site - Santa Clara-a-Velha
River Basin - Mira
River - Mira river
Promoting entity - INAG
Owner - Assoc. de Beneficiários do Mira
Engineering by - DGSH
Construction by - Engº A. Supico
Project year - 1960
Year of completion - 1968
HYDROLOGY RESERVOIR
River basin area - 520 km2
Mean annual rainfall - 618 mm
Mean annual runoff - 90 600 x 1 000 m3
Flood runoff - 2 000 m3/s
Return period- 
1 000 years
Reservoir area   - 19 860 x 1 000 m2
Gross capacity - 485 000 x 1 000 m3
Effective storage - 240 300 x 1 000 m3
Dead storage - 244 700 x 1 000 m3
Normal water level (NWL)- 130 m
Maximum flood level (MFL) - 132 m
Minimum operating level - 114,7 m
DAM
Earthfill - Zoned embankment
Height above foundation -
 87 m
Height above streambed - 83 m
Crest elevation - 135 m
Crest length - 428 m
Crest width - 10 m
Foundation - Porphiry, schist and greywacke
Volume of dam body
3 966 x 1 000 m3
SPILLWAY BOTTOM OUTLE
Location - Left bank
Control type - Uncontrolled
Spillway type - Shaft spillway
Sill elevation - 130 m
Sill length -
28,3 m
Maximum discharge - 208 m3/s
Energy dissipation - Hydraulic jump
Location - Left bank
Type - Rock tunnel
Section - d 1,5 m
Maximum discharge  - 124 m3/s
Upstream control - Catterpiller gate
Downstream control  - 2 sluice gates
Energy dissipation - Hydraulic jump
POWER PLANT
Type - Far from the dam
Mean annual energy output - 1,9 GWh


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