Place

Seli River - Sierra Leone


Client

Ministry of Energy & Power - Republic of Sierra Leone


Year

1975 - in progress

Description for Bumbuna (Sierra Leone)

This is one of our pet projects that we have faithfully followed for the past forty years notwithstandings several challenges (including civil war). It comprises a rockfill dam, 88 m high, and a generating plant with a capacity of 50 MW.

Main Features

  • Reservoir (V = 410 Mm³)
  • Bituminous Faced Rockfill dam (BFRd, H = 88 m, V = 2.8 Mm³)
  • No. 2 headrace tunnels (L = 620 m, D = 9 m)
  • Shaft power house (No. 2 Francis turbines, HN = 80 m, Q = 80 m³/s, IP = 50 MW)
  • No. 2 vertical synchronous generators (33.7 MVA)
  • No. 2 step up transformers (13.8/161 kV)
  • Transmission line (161 kV, L = 205 km)
  • No. 2 substations with step-down transformers

Engineering Services

  • Prefeasibility and Feasibility studies
  • Final Design
  • Revision and Updating of Final Design
  • Supervision of Works
  • Dam Safety Programme and Emergency Preparedness Plan
  • Dam Operation and Maintenance Manual
  • Monitoring and Assistance during Operation

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