NEW DELHI: The company that operates Delhi’s airport would invest Rs 9,800 crore through June 2022 to upgrade the existing Terminal 1, build a fourth runway and for other development work, to increase the airport’s capacity to 100 million passengers a year from 66 million now.“We have arranged for funds. We have already gone into international bonds,” said I Prabhakara Rao, deputy managing director of the GMR Group, which holds a majority stake in Delhi International Airport Ltd ( DIAL ) that runs the airport.“The airport expansion project cost is met through combination of three components –internal cash accruals, real estate monetisation and borrowings. This includes $350 million FCB, equivalent to Rs 2,425 crore, raised as part of expansion funding and internal cash accruals of Rs 3,000 crore,” said Rao.It is not clear as to how the airport will recover the money which is being pumped in, as Rao declined to get into the details during a press conference here on Monday.Earlier, the airport imposed an arrival and departure tax on passengers to recover its investments, primarily in building Terminal 3 at the cost of Rs 12,700 crore. The arrival charge was discontinued after the airport operator recovered its investment. It still levies a nominal departure fee.DIAL is a consortium of the GMR Group, Airports Authority of India and Germany’s Frapport. The consortium has a mandate to finance, design, build, operate and maintain Delhi airport for 30 years, with an option to extend it by another 30 years.According to the proposed plan, the entire Terminal 1 apron would be demolished and a new and expanded apron would be constructed to provide higher capacity layout with parking stand for 82 aircraft.Besides, the arrival and departure terminal in T1 would be integrated under one roof. The progressive completion of T1apron would be from July 2020 to June 2022.