Tarbela 4th Extension Hydropower Project

Tarbela 4th Extension Hydropower Project


Tarbela Dam (on Indus River), District Swabi, Khyber Pakhtunkhwa

Salient Features
  • Modification of Tunnel 3 & 4 Intakes
  • Construction of Low Level Outlet Gates
  • Installed Capacity 1,410 MW (Three Units 470 MW each)
  • Annual Energy 3,840 GWh
Consultants JV of Mott MacDonalds Ltd. UK, Coyne-et-Bellier, France with MM Pakistan & ACE Pakistan as Sub-consultants
  • Civil Work Contract awarded to M/s Sinohydro Group Ltd. China (SHGL).
  • E&M Work Contract awarded to M/s Voith Hydro China & Voith Hydro GmbH Germany (Consortium).
Commencement Date Oct 28,2013
Completion Date Actual 10th March 2018 (Unit #17) (Civil Works of Power House completed, remaining Intakes works to be completed by June 2021)(dependent on safe reservoir level & T3 & T4 shutdowns). 
Financial Status (Rs. Million) Local Foreign Total
1st Revised PC-I Cost (06.01.2020) 62,277.000 60,700.000 122,977.000
PSDP Allocation 2021-2022 1,100.000 800.000 1,900.000


Civil Works:


  • No activity is observed at Intake due to high reservoir level. The works at the Intake will be resumed in lean period -2022.


  • Formwork installation, cleaning and chipping of concrete floor PH EL: 323.5m continued.
  • Chemical grouting completed in Erection Bay and continued in drainage gallery and cooling floor.
  • Site restoration works (removal of drainage trench near LLO) continued.

Physical Progress for Civil Works achieved is 99.48% against 100%.

E&M Works:

  • On availability of required reservoir level above rock barrier, units of Tunnel-3 and Tunnel-4 in operation.
  • As-Built documents handing-over continued.
  • Spare parts are being taken-over by T4 O&M as per approved lists/BOQ.

Physical Progress for E&M Works is 99.98% against 100%.

ICB Contract-102 (Up-gradation of existing 500 kV Switchyard): 100% completed

Overall Physical Progress:          99.73%

Incharge of the Project
Engr. Zakir Attiq
Chief Engineer/Project Director
Tarbela 4th Ext Project
Contact No. 0092-938-281175
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