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Gokayama

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Gokayama completed
Gokayama completed

Particulars

Owner: Fukuoka Prefecture

Designer: Crearia Inc.

Contractor: Kajima Corp.

Statistics

Type: Gravity

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

Reservoir capacity: 40 m3x106

Height: 103 metres

Length: 556 metres

Volume of RCC: 634 m3x103

Total volume: 935 m3x103

Construction Dates

Start of Project: 06/12 (June 2012)

Start of RCC: 06/14 (June 2014)

End of RCC: 07/15 (July 2015)

End of Project: 03/18 (March 2018)

Country: Japan

River: Naka

DMS Co-ordinates: 33˚24'48.57"N, 130˚25'6.34"E

DD Co-ordinates: 33.413490, 130.418427

Facings

Upstream

SlopeType
VerticalTraditional concrete against formwork
1.00Traditional concrete against formwork

Downstream

SlopeType
0.76Traditional concrete against formwork

Spillway

SlopeType
0.76Traditional concrete against formwork

Placement

Layers (mm)Lifts (mm)
2501000

Cementitious material

Cement (kg/m3)
104
Pozzolan (kg/m3)Pozzolan Type
26Low-lime flyash (ASTM Class F)