Main Dam

Roller Compacted Concrete (RCC)

     Gravity dam (Vol = 1,000,000m³)

Crest length - 492.5m

Dam crest elevation - 185.0masl

Maximum dam height - 108m

Dam crest width - 7m

Reservoir

Full Supply Level (FSL) - 183.0masl

Reservoir Area at FSL - 444km²

Storage Volume at FSL - 12.57 x 10⁹m³ 

Minimum Operating Level - 168.0masl

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 - 166.5masl

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 will be transmitted through extensions to the 161 kV National Interconnected Transmission System. These extension facilities to be constructed are:

Bui Switchyard

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

Bui – Sunyani transmission line - 138km

Bui – Kintampo transmission line - 70km

*Kintampo Substation, by GRIDCo