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Miyagase

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Miyagase completed
Miyagase completed

Particulars

Owner: Ministry of Construction

Designer: Ministry of Construction

Contractor: Kajima Co Ltd, Ohbayashi Co Ltd and Toda Construction Co Ltd J.V.

Statistics

Type: Gravity

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

Reservoir capacity: 193 m3x106

Height: 156 metres

Length: 400 metres

Volume of RCC: 1537 m3x103

Total volume: 2060 m3x103

Construction Dates

Start of Project: 11/87 (November 1987)

Start of RCC: 11/91 (November 1991)

End of RCC: 02/95 (February 1995)

End of Project: 03/01 (March 2001)

Country: Japan

River: Nakatsu

DMS Co-ordinates: 35˚32'31.89"N, 139˚14'56.42"E

DD Co-ordinates: 35.542191, 139.249008

Facings

Upstream

SlopeType
0.20Traditional concrete against formwork
0.60Traditional concrete against formwork

Downstream

SlopeType
0.625Traditional concrete against formwork

Spillway

SlopeType
0.625Traditional concrete against formwork

Placement

Layers (mm)Lifts (mm)
150  -750
200 

Cementitious material

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