3. History of Tarbela Dam
Tarbela Dam is one of
the world’s largest earth
and rock filled Dam.
Greatest water
resources
The Dam is built on one
of the World’s largest
rivers – the Indus known as
the “Abbasin” or the father
of rivers
4. History of Tarbela Dam
General consultant of
WAPDA is HAZARA
ENGINEERING COMPANY
The World Bank
accepted Tarbela Dam
Project in 1965
Built between 1968 and
1976
5. Project Constrain
• Cost
The total cost of project including power
units (1-14) amount to US $ 2.63 billion.
• Time
– 8.3 year’s
6. The Project Main Feature
Project Consists of a 9,000 (2,743
meters) long.
spillway capacity 6.5millan cuescs
The dam is 469 feet (143 m) high.
The Dam is 8,997 feet (2,743 m)
wide at its crest.
The total spillway capacity is
1,500,000
Reservoir Aria 80km
7. Tunnels
• Total number of Tunnels 4
• Length half mile
• Tunnel 1, 2, 3 for power generation and
tunnel 4 for irrigation
8. Spillway
• Two Spillway (Service spillway auxiliary
spillway)
• Spillway is flood routing structure
• Spillways capacity is 1500,000 cusecs
9. Spillway
• Service spillway has 44% of total capacity
• Discharge capacity of service spillway is
650,000 cusecs.
• Discharge capacity of auxiliary spillway is
850,000 cusecs.
10. Power Generation
Four power units of 175 MW installed on each
of the tunnels 1, 2, and 3.
The project has thus been enhanced from
2100 MW, as originally planned to 3478 MW.
11. TURBINE
• Convert to potential energy to mechnical
energy
• No of turbine/Units; 14
• Output (BHP); First 10 unit produce 23900 H.p
and last 4 units produce 586000 H.P
12. Generator
• Convert to mechanical energy into electrical
energy
• No of pole: 44
• Rated Frequency: 50c/s
Generator 1-10 11-14
Output(P.F) 0.85 0.85
Output(MW) 175 432
Rated Voltage(KV) 13.8 13.8
13. Transformer
• 3 phase Transformer used to purpose of step
up voltage
Transformer 1-4 5-14
Capability
(MVA/Phase)
79 71
Voltage Ratio 13.8/220 13.8/500
14. Transmission and distribution
• No. of 500 KV feeder = 4
• No. of 220 KV feeder = 6
• Scheme Layout = Double Bus bar/ One and
half breaker system
