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Longtan

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Longtan completed
Longtan completed

Particulars

Owner: Longtan Hydropower Development Co. Ltd.

Designer: Mid-South Design Institute for Hydroelectric Projects, MOE & MWR

Contractor: JV of 7th, 8th and Gezhouba Construction Bureaus (Right Bank) and Jiangnan Co. Ltd. (Left Bank)

Statistics

Type: Gravity

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

Reservoir capacity: 29920 m3x106

Height: 217 metres

Length: 832 metres

Volume of RCC: 4952 m3x103

Total volume: 7458 m3x103

Construction Dates

Start of Project: 07/01 (July 2001)

Start of RCC: 10/04 (October 2004)

End of RCC: 04/08 (April 2008)

End of Project: 12/09 (December 2009)

Country: China

River: Hongshui

DMS Co-ordinates: 25˚01'41.99"N, 107˚02'36.40"E

DD Co-ordinates: 25.028332, 107.043442

Facings

Upstream

SlopeType
VerticalRCC against formwork (GEVR/GE-RCC)
0.25 

Downstream

SlopeType
0.70RCC against formwork (GEVR/GE-RCC)

Spillway

SlopeType
0.68Reinforced conventional concrete cast after RCC placement

Placement

Layers (mm)Lifts (mm)
300300

Cementitious material

Cement (kg/m3)
99
86
Pozzolan (kg/m3)Pozzolan Type
121Low-lime flyash (ASTM Class F)
109