Miyatoko
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Miyatoko completed
Particulars
Owner: unknown
Designer: ?
Contractor: Shimizu Construction Co Ltd, Mitsui Construction Co Ltd and Chizaki Kogyo Co Ltd J.V.
Statistics
Type: Gravity
Purpose(s): Flood Control / Water Supply
Reservoir capacity: 5 m3x106
Height: 48 metres
Length: 256 metres
Volume of RCC: 172 m3x103
Total volume: 280 m3x103
Construction Dates
Start of Project: 06/89 (June 1989)
Start of RCC: 06/90 (June 1990)
End of RCC: 12/93 (December 1993)
End of Project: 01/97 (January 1997)
Country: Japan
River: Miyatoko
DMS Co-ordinates: 38˚23'13.48"N, 140˚49'20.5"E
DD Co-ordinates: 38.387077, 140.822357
Facings
Upstream
| Slope | Type |
|---|---|
| 0.60 | Traditional concrete against formwork |
Downstream
| Slope | Type |
|---|---|
| 0.80 | Traditional concrete against formwork |
Spillway
| Slope | Type |
|---|---|
| 0.80 | Traditional concrete against formwork |
Placement
| Layers (mm) | Lifts (mm) |
|---|---|
| 180 | 500 |
Cementitious material
| Cement (kg/m3) |
|---|
| 96 |
| Pozzolan (kg/m3) | Pozzolan Type |
|---|---|
| 24 | Low-lime flyash (ASTM Class F) |
