The first phase of a $1 billion redevelopment project at Houston's Bush Intercontinental Airport will begin by the end of the year. The initial $161 million phase of the three-part project will replace the 1969 Terminal B south concourse with new facilities for United Airlines' domestic regional jet operations. The carrier also has announced the extension of its lease on Terminal C at the facility through 2027. The design of the new Terminal B south concourse will incorporate energy-efficient techniques using LEED criteria. Phase one will be completed by the end of 2013, after which Terminal B's lobby and baggage-claim areas will be redone, a new international-capable north concourse for mainline and regional jet flights will be built, a new Terminal B Federal Inspections Services facility will be added and infrastructure improvements will be made.