Main Dam

Roller Compacted Concrete (RCC)

     Gravity dam (Vol = 1,000,000m³)

Crest length – 492.5m

Dam crest elevation – 185.00m

Maximum dam height – 108m

Dam crest width – 7m

Reservoir

Full Supply Level (FSL) – 183.00m

Reservoir Area at FSL = 444km²

Storage Volume at FSL = 12.57 x 10⁹m³ 

Minimum Operating Level – 168.00m

Active Storage = 7.72 x 10⁹m³

Spillway

Five gated structure

Designed for one (1) in a 10,000 year flood of 10,450m³/s

Weir crest elevation – 166.5m

Power House

Unit Type – 3 Francis Turbines/Generators of 133MW each

Guaranteed Peak Efficiency >94%

Installed Capacity – 400MW

Net Average long term energy production – 969GWh/yr

Transmission System

Power produced from the plant will be evacuated from the Bui Switchyard through 161 kV transmission facilities which will be operated as part of the National Interconnected Transmission System.

The transmission facilities to be constructed are:

Bui Switchyard

Bui – Teselima Two (2) lines– 18km each

Bui – Kenyase transmission line– 170km

Bui – Kintampo transmission line– 80km

*Kintampo Substation, by GRIDCo