The Tarbela Fourth Extension Hydropower Project of Pakistan involves constructing a power house, modifying a tunnel, and installing three 470 MW power units (total of 1,410 MW) on an existing dam located 60 km north-west of Islamabad on the main River Indus by June 2018. As requested by the government in its letter dated January 19, 2015, it is proposed to reallocate US$ 100 million and US$ 40 million of IBRD Loan 8144-PK from Category (2) and (10) respectively to Category (1) so that the IBRD loan is fully utilized and savings under the Project can be attributed to IDA. These savings can later be reprogrammed for the Pakistan portfolio after ascertaining the exact amount.