Official sources told APP here Monday said that the up- gradation of the Switchyard was scheduled to be completed in May 2017, which would enable WAPDA to disperse electricity from Tarbela Hydel Power Station to the National Grid after completion of Tarbela 4th Extension Hydropower Project .
Earlier the project was scheduled to be completed in 2018, but on the directive of the prime minister, work has been expedited on the project and now it would be ready by next year.
The World Bank was providing $ 840 million for the project while Water and Power Development Authority arranged the remaining $ 80 million.
Three units of 370 MW each would be installed at the power house which would enhance the total electricity generation to 4888 MW from the existing 3478 MW.
Dilating upon the benefits of the project, they said that the project having three units of 370MW each would produce 3,840GWh of cheap hydropower at a time when electricity needs would be at peak in hot and humid weather.
Annual benefits of the project have been estimated at around Rs30.7 billion. The project will pay back its cost in just three years.