Place

Oromia region - Ethiopia


Client

Salini Impregilo S.p.A.


Year

2016 - in progress

Description for Koysha Hydropower (Ethiopia)

Koysha is the fourth plant of the Omo river cascade (IPtot = 4600 MW), comprising Gilgel Gibe (200 MW), Gibe II (420 MW) and Gibe III (1870 MW), all currently in operation.

Main Features

  • RCC Gravity Dam ( H = 170 m, crest L = 990 m )
  • U/S RCC & Rockfill Cofferdam ( H = 42 m, L = 330 m )
  • D/S Rockfill Cofferdam ( H = 14 m, L = 210 m )
  • Gated Spillway ( Q=13'100 m3/s ), on the abutment, with ski jump and plunge pool
  • Penstocks ( No. 3, L = 0.65 km, D = 9.5 m )
  • Power House ( type, No. 8 Francis turbines, IP = 2160 MW, synchronous generators 318 MVA at 16kV )
  • Switchyard ( 400kV, no. 14 bays )
 

Engineering Services

  • Prefeasibility Study
  • Feasibility Study
  • Basic Design
  • Level 1 Design
  • Level 2 Design
  • Technical Supervision during Construction for EPC Contractor

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