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Powerhouse
- Approximately 120 m long
- Will operate at a head, or waterfall, of about 22 m
- Upstream deck of the powerhouse has an elevation of 235.5 m ASL
- Maximum height above the elevation of the structure’s foundation is 57 m
- Includes three water passages through each intake structure, each with a set of vertical trashracks
- Includes the south transition structure and service bay
- Includes three generating units, each with a vertical shaft, fixed blade propeller turbine with a blade runner diameter of 6.7 m
- A semi-spiral scroll case water passage in each unit distributes the water from the intake over the full circumference of the turbine
- Discharge from each turbine passes through
a draft tube that discharges into the tailrace.
Spillway
- Located north of the powerhouse
- Is a concrete structure 43 metres in
length with three bays
- Will have a vertical lift gate in each bay,
measuring 9 metres wide by 16 metres high
- Powerhouse and spillway are separated
by a 42-metre-long reinforced concrete gravity non-overflow
dam
- Serves as a diversion channel during
construction of the main dam, and as flood routing for
the reservoir during operation
- Capable of safely passing a peak
discharge of about 2,700-cubic-metre per second (the probable
maximum flood rate).
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