Andekaleka Dam

Andekaleka Dam
Location of Andekaleka Dam in Madagascar
Country Madagascar
Location Andekaleka, Analamanga Region
Coordinates 18°47′39.02″S 48°37′09.49″E / 18.7941722°S 48.6193028°E / -18.7941722; 48.6193028Coordinates: 18°47′39.02″S 48°37′09.49″E / 18.7941722°S 48.6193028°E / -18.7941722; 48.6193028
Purpose Power
Status Operational
Construction began 1978
Opening date 1982
Construction cost US$142.1 million
Owner(s) Jirama
Dam and spillways
Type of dam Gravity
Impounds Vohitra River
Height 10 m (33 ft)
Length 125 m (410 ft)
Power station
Name Andekaleka Hydroelectric Power Station
Coordinates 18°48′12.20″S 48°39′20.03″E / 18.8033889°S 48.6555639°E / -18.8033889; 48.6555639
Commission date 1982, 2012
Hydraulic head 235 m (771 ft)
Turbines 2 x 29 MW (39,000 hp), 1 x 33 MW (44,000 hp) Francis-type
Installed capacity 91 MW (122,000 hp)

The Andekaleka Dam is a gravity dam on the Vohitra River near Andekaleka in eastern Madagascar. The primary purpose of the dam is hydroelectric power generation and it diverts water from the Vohitra east into a 4 kilometres (2.5 mi) headrace tunnel where it reaches a 91 megawatts (122,000 hp) underground power station. After water charges the turbine-generators, it travels down a 500 metres (1,600 ft) tailrace tunnel before it reenters the Vohitra River. The drop in elevation between the dam and power station affords a hydraulic head of 235 metres (771 ft).[1][2] The dam and power station were funded by the World Bank at a cost of US$142.1 million. It was constructed between 1978 and 1982.[3] The power station can house up to four generators. The first two were operational in 1982 and a third in 2012.[4]

References

  1. "Andekaleka Hydroelectric Project" (PDF). World Bank. 18 May 1978. Retrieved 18 March 2014.
  2. Humphries, R. W. "Underground design at Andekaleka Hydroelectric Development". Canadian Geotechnical Journal. Retrieved 18 March 2014.
  3. "Andekaleka Hydroelectric Project Completion Report" (PDF). World Bank. 27 December 1991. Retrieved 18 March 2014.
  4. "Inventaire du parc hydroélectrique existant - Juin 2013" (in French). ORE. June 2013. Retrieved 18 March 2014.
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