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Chiya

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Chiya completed
Chiya completed

Particulars

Owner: Okayama Prefecture

Designer: Okayama-ken

Contractor: Ohbayashi Co Ltd, Kajima Co Ltd and Ohmoto-Gumi Co Ltd J.V.

Statistics

Type: Gravity

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

Reservoir capacity: 28 m3x106

Height: 98 metres

Length: 259 metres

Volume of RCC: 396 m3x103

Total volume: 670 m3x103

Construction Dates

Start of Project: 03/89 (March 1989)

Start of RCC: 09/92 (September 1992)

End of RCC: 04/95 (April 1995)

End of Project: 03/98 (March 1998)

Country: Japan

River: Takahashi

DMS Co-ordinates: 35˚3'23.86"N, 133˚27'25.25"E

DD Co-ordinates: 35.056629, 133.457016

Facings

Upstream

SlopeType
VerticalTraditional concrete against formwork

Downstream

SlopeType
0.77Traditional concrete against formwork

Spillway

SlopeType
0.77Traditional concrete against formwork

Placement

Layers (mm)Lifts (mm)
250750

Cementitious material

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