Dyraaba (part of Uma Oya Project)
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Dyraaba (part of Uma Oya Project) completed
Particulars
Owner: Ministry of Irrigation and Water Resources Management
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
| Slope | Type |
|---|---|
| Vertical | Traditional concrete against formwork |
Downstream
| Slope | Type |
|---|---|
| Traditional concrete against formwork [stepped face] |
Spillway
| Slope | Type |
|---|---|
| Reinforced conventional concrete cast after RCC placement |
Placement
| Layers (mm) | Lifts (mm) |
|---|---|
| 300 | 300 |
Cementitious material
| Cement (kg/m3) |
|---|
| 95 |
| Pozzolan (kg/m3) | Pozzolan Type |
|---|---|
| 95 | Low-lime flyash (ASTM Class F) |
