Knellpoort
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Knellpoort completed
Particulars
Owner: unknown
Designer: Department of Water Affairs
Contractor: Department of Water Affairs
Statistics
Type: Arch-Gravity
Purpose(s): Water Supply
Reservoir capacity: 137 m3x106
Height: 50 metres
Length: 200 metres
Volume of RCC: 45 m3x103
Total volume: 59 m3x103
Construction Dates
Start of Project: 04/88 (April 1988)
Start of RCC: 05/88 (May 1988)
End of RCC: 11/88 (November 1988)
End of Project: 09/89 (September 1989)
Country: South Africa
River: Rietspruit
DMS Co-ordinates: 29˚46'53.85"S, 26˚53'19.53"E
DD Co-ordinates: -29.781626, 26.888758
Facings
Upstream
| Slope | Type |
|---|---|
| Vertical | Traditional concrete against formwork |
Downstream
| Slope | Type |
|---|---|
| 0.60 | Traditional concrete against formwork [stepped face] |
Spillway
| Slope | Type |
|---|---|
| 0.60 | Traditional concrete against formwork [stepped face] |
Placement
| Layers (mm) | Lifts (mm) |
|---|---|
| 250 | 250 |
Cementitious material
| Cement (kg/m3) |
|---|
| 61 |
| Pozzolan (kg/m3) | Pozzolan Type |
|---|---|
| 142 | Low-lime flyash (ASTM Class F) |
