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Dyraaba (part of Uma Oya Project)

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Dyraaba (part of Uma Oya Project) completed
Dyraaba (part of Uma Oya Project) completed

Particulars

Owner: unknown

Designer: unknown

Contractor: Farab Company, Iran (sub-Contracted to Ev-Yol Construction Co.)

Statistics

Type: Gravity

Purpose(s): Hydropower / Irrigation

Reservoir capacity: 1 m3x106

Height: 50 metres

Length: 165 metres

Volume of RCC: 40 m3x103

Total volume: 50 m3x103

Construction Dates

Start of Project: /11 ( 2011)

Start of RCC: /13 ( 2013)

End of RCC: /17 ( 2017)

End of Project: /18 ( 2018)

Country: Sri Lanka

River: Mathatilla Oya

DMS Co-ordinates: 6˚53'12.98"N, 80˚57'22.73"E

DD Co-ordinates: 6.886939, 80.956314

Facings

Upstream

SlopeType
VerticalTraditional concrete against formwork

Downstream

SlopeType
 Traditional concrete against formwork

Spillway

SlopeType
 Reinforced conventional concrete cast after RCC placement

Placement

Layers (mm)Lifts (mm)
300300

Cementitious material

Cement (kg/m3)
95
Pozzolan (kg/m3)Pozzolan Type
95Low-lime flyash (ASTM Class F)