Nagai
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Nagai completed
Particulars
Owner: unknown
Designer: Ministry of Land, Infrastructure and Transport
Contractor: Hazama-Gumi Co. Ltd., Maeda Construction Kogyo Co Ltd. & Okumur-Gumi Co. Ltd. JV
Statistics
Type: Gravity
Purpose(s): Flood Control / Hydropower / Navigation / Water Supply
Reservoir capacity: 51 m3x106
Height: 126 metres
Length: 381 metres
Volume of RCC: 703 m3x103
Total volume: 1200 m3x103
Construction Dates
Start of Project: 03/00 (March 2000)
Start of RCC: 10/02 (October 2002)
End of RCC: 11/06 (November 2006)
End of Project: 03/11 (March 2011)
Country: Japan
River: Okitamano
DMS Co-ordinates: 38˚6'3.64"N, 139˚57'27.08"E
DD Co-ordinates: 38.101009, 139.95752
Facings
Upstream
| Slope | Type |
|---|---|
| Vertical | Traditional concrete against formwork |
| 0.50 | Traditional concrete against formwork |
Downstream
| Slope | Type |
|---|---|
| 0.73 | Traditional concrete against formwork |
Spillway
| Slope | Type |
|---|---|
| 0.73 | Traditional concrete against formwork |
Placement
| Layers (mm) | Lifts (mm) |
|---|---|
| 250 | 1000 |
Cementitious material
| Cement (kg/m3) |
|---|
| 91 |
| Pozzolan (kg/m3) | Pozzolan Type |
|---|---|
| 39 | Low-lime flyash (ASTM Class F) |
