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Yamba

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Yamba under construction
Yamba under construction

Particulars

Owner: Ministry of Land, Infrastructure, Transport and Tourism

Designer: Idowr Engineering Co. Ltd.

Contractor: Shimizu Corp.

Statistics

Type: Gravity

Purpose(s): Flood Control / Hydropower / Irrigation / Navigation / Water Supply

Reservoir capacity: 108 m3x106

Height: 116 metres

Length: 291 metres

Volume of RCC: unknown

Total volume: 911 m3x103

Construction Dates

Start of Project: 08/14 (August 2014)

Start of RCC: 05/17 (May 2017)

End of RCC: 05/19 (May 2019)

End of Project: 10/19 (October 2019)

Country: Japan

River: Azuma

DMS Co-ordinates: 36˚33'24.56"N, 138˚42'49.85"E

DD Co-ordinates: 36.556824, 138.713852

Facings

Upstream

SlopeType
0.15Traditional concrete against formwork

Downstream

SlopeType
0.80Traditional concrete against formwork

Spillway

SlopeType
0.08Traditional concrete against formwork

Placement

Layers (mm)Lifts (mm)
2501000

Cementitious material

Cement (kg/m3)
84
Pozzolan (kg/m3)Pozzolan Type
36Low-lime flyash (ASTM Class F)