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Grand Ethiopian Renaissance Dam Project

Name of Project:

Grand Ethiopian Renaissance Dam Project



Country:
Ethiopia

Client:
Ethiopian Electric Power Corporation (EEPCo)

Total value:
€ 3,377.05 million

Start of works:
December 2010

Expected duration:
78 months

The project is located approximately 500 km north west of the capital Addis Ababa, in the region of Benishangul - Gumaz along the Blue Nile. At the end of the works, the Grand Ethiopian Renaissance Dam will be the largest dam in Africa: 1,800 m long, 170 m high and with a total volume of 10 million m³.

The project involves the construction of a main dam in Roller Compacted Concrete (RCC), with 2 power stations installed at the foot of the dam. The power stations are positioned on the right and left banks of the river and comprise 16 Francis turbines with a total installed power of 6,000 MW and estimated production of 15,000 GWh per year. The project is completed by a 15,000 m3/s capacity concrete spillway and a rockfill saddle dam 5 km long and 50 m high, both located on the left bank.

 

MAIN TECHNICAL DATA:

Main Dam

Type: gravity dam in Roller Compacted Concrete (RCC)
Maximum height: 170 m
Crown length: 1,800 m
Crown height: 645 slm
Dam body volume: 10,000,000 m3
There is an emergency spillway in the centre of the dam without sluices

Saddle dam

Type: rockfill dam with waterproof asphalt surface
Maximum height: 50 m
Crown length: 5,000 m
Crown height: 645 slm
Dam body volume: 16,000,000 m3
There is an emergency spillway with no sluices on the right bank

Reservoir specifications

Volume: 63 billion m3
Surface area: 1,800 km2

Power stations

There are plans for 2 open-air power stations, 1 on the right bank and 1 on the left bank, at the foot of the main dam
Right bank: 10 Francis turbines with a capacity of 375 MW each
Left bank: 6 Francis turbines with a capacity of 375 MW each

Spillway

Type: threshold controlled by sluice gates, concrete-coated drainage channel, non-coated dissipation pit and return channel
Design capacity: 15,000 m3/s
Sluices: 6 – 14 x 15.5 m

Ancillary works

N1 x 500 kV substation
120 km of access roads with a bridge over the Blue Nile (235 metres long)
Camps and services for housing approximately 11,000 people

OTHER WORKS:Ethiopia

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