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Kukule Ganga Dam, Ceylon Electricity Board, Sri Lanka

Client

Ceylon Electricity Board

Main contractor

JV - Kajima, Kumagai, Hazama

Project management

Skanska

Dam contractor

JV - Kajima, Kumagai, Hazama

Power plant contractor

Skanska International Engineering Consortium (SIEC): Lahmeyer International, Skanska, Electrowatt

Engineering consultants

Electrowatt Engineering Ltd, Nippon Koei Co Ltd, Lahmeyer International

Generator-motor and control equipment supplier

SISGEO

Surge shaft contractor

Bygging-Uddemann

Environmental impact monitor

Industrial Technology Institute, Sri Lanka

Completion date

November 2003

Financing

Overseas Economic Corporation of Japan (85%) and Ceylon Electricity Board (15%)

Estimated cost

$251m

Dam type

Concrete weir

Reservoir surface area

88ha surface area

Head pond capacity

1,630,000m³

Dam height

20m

Crest length

110m

Spillway gates

4

Headrace tunnel length

5.65km

Headrace tunnel internal diameter

6.4m (unlined)

Vertical pressure shaft length

140m

Tailrace tunnel length

1.6km

Power station type

Hydro

Power station location

Underground

Power station depth

200m

Power station length

50m

Penstock type

Underground

Penstock length

5km

Powerhouse type

Underground

Turbine type

Vertical reversible Francis pump turbine

No of units

2

Turbine output

35MW

Generator type

Vertical synchronous motor generator

No of units

2

Annual generator output

317,000,000kWh
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