PISCO DAM

PURPOSE - Water supply / Irrigation
LOCATION GENERAL FEATURES
District - Castelo Branco
Municipality - Castelo Branco
Site - S. Vicente da Beira
River Basin - Tejo
River - S. Vicente river
Promoting entity- C M de Castelo Branco
Owner - Servišos Municipalizados de Castelo Branco
Engineering by - Eng║ Alberto Vilaša
Construction by - TRABEL
Project year - 1966
Year of completion - 1968
HYDROLOGY RESERVOIR
River basin area - 14,2km2
Mean annual rainfall - 1 218 mm
Mean annual runoff - 4 200 x 10 00 m3
Flood runoff  - 100 m3/s
Reservoir area - 198 x 1 000m2
Gross capacity - 1 400 x 1 000m3
Effective storage - 1 040 x 1 000m3
Dead storage  - 113 x 1 000m3
Normal water level (NWL) - 498,7m
Maximum flood level (MFL) - 499,7 m
Minimum operating level  - 485,7 m
DAM
Earthfill -  Homogeneous embankment
Height above foundation - 24,5 m
Height above streambed - 23,2 m
Crest elevation - 500,9 m
Crest length - 260 m
Crest width - 8 m
Foundation -
Schist and greywacke
Volume of dam body
- 58 x 1000 m3
SPILLWAY BOTTOM OUTLET
Location - Left bank
Control type - Uncontrolled
Spillway type - Chute spillway
Sill elevation - 498,7 m
Sill length -
2 x 10 m
Maximum discharge - 43 m3/s
Energy dissipation - Hydraulic jump
Location - Left bank
Type - Conduit under the embankment
Section - d 0,40 m
Maximum discharge - 1,41 m3/s
Upstream control  - Sluice gate
Energy dissipation - Inexistent


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