Indonesian state-owned airport operator Angkasa Pura I is on track to complete expansion projects at three airports later this year.
Expansion works at Denpasar's Ngurah Rai, Balikpapan's Sepinggan and Surabaya's Juanda airports are scheduled to be completed by May, July and October respectively.
It is spending around Indonesian rupiah (Rp) 5.55 trillion ($570 million) to expand the three airports, says a spokesman for the airport operator.
The terminal at Denpasar's Ngurah Rai airport will be upgraded and expanded to serve 25 million passengers annually, up from the current 9 million. New aprons are also being built to accommodate more aircraft at the airport.
Sepinggan airport in Balikpapan will have a new 110,000m² (1,184,000ft²) terminal that can accommodate 10 million passengers annually, up from the current terminal's 1.7 million passengers. The existing terminal could be converted for other unspecified uses in the future.
An office building and 11 jetways will also be built as part of the expansion project.
The spokesman says plans to lengthen the airport's runway to 3,250m (10,700ft) from 2,500m, however, have not been finalised. The project may be handled either by the city, provincial or central government, with input from the country's directorate general of civil aviation.
Angkasa Pura I also will construct a second passenger terminal for Surabaya's Juanda airport. The new 49,700m² terminal would be able to accommodate up to 6.5 million domestic and international passengers.
Around 42% of the first phase of Juanda airport's development has been completed, according to a project update document provided by the airport operator. The second phase of the project, meanwhile, is undergoing a bidding process.
The project, valued at Rp946 million, will raise the airport's total annual capacity to 12 million passengers, adds the spokesman.