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Ohmatsugawa

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Ohmatsugawa completed
Ohmatsugawa completed

Particulars

Owner: Akita Prefecture

Designer: Akita-ken

Contractor: Nishimatsu Construction Co Ltd and Okamura Construction Co Ltd J.V.

Statistics

Type: Gravity

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

Reservoir capacity: 12 m3x106

Height: 65 metres

Length: 296 metres

Volume of RCC: 141 m3x103

Total volume: 294 m3x103

Construction Dates

Start of Project: 07/90 (July 1990)

Start of RCC: 10/92 (October 1992)

End of RCC: 06/95 (June 1995)

End of Project: 09/96 (September 1996)

Country: Japan

River: Matsu

DMS Co-ordinates: 39˚18'29.1"N, 140˚38'43.95"E

DD Co-ordinates: 39.308083, 140.645538

Facings

Upstream

SlopeType
VerticalTraditional concrete against formwork
0.70Traditional concrete against formwork

Downstream

SlopeType
0.76Traditional concrete against formwork

Spillway

SlopeType
0.76Traditional 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)