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Ryumon

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Ryumon completed
Ryumon completed

Particulars

Owner: Ministry of Construction

Designer: Ministry of Construction

Contractor: Nishimatsu Construction Co Ltd., Aoki Construction Co Ltd and Zenidaka-gumi Co Ltd (J.V)

Statistics

Type: Gravity

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

Reservoir capacity: 42 m3x106

Height: 100 metres

Length: 378 metres

Volume of RCC: 521 m3x103

Total volume: 836 m3x103

Construction Dates

Start of Project: 09/87 (September 1987)

Start of RCC: 03/90 (March 1990)

End of RCC: 11/92 (November 1992)

End of Project: 03/97 (March 1997)

Country: Japan

River: Sakoma

DMS Co-ordinates: 33˚2'12.17"N, 130˚50'59.96"E

DD Co-ordinates: 33.036713, 130.849991

Facings

Upstream

SlopeType
VerticalTraditional concrete against formwork
0.30Traditional concrete against formwork

Downstream

SlopeType
0.80Traditional concrete against formwork

Spillway

SlopeType
0.80Traditional concrete against formwork

Placement

Layers (mm)Lifts (mm)
150  -750  -
2001000

Cementitious material

Cement (kg/m3)
91
Pozzolan (kg/m3)Pozzolan Type
39Low-lime flyash (ASTM Class F)