Hartsfield–Jackson Atlanta International Airport now the airport's second largest carrier. In May 2001 construction of an over fifth runway (10–28) began. It was completed at a cost of $1.28 billion and opened on May 27, 2006. It bridges Interstate 285 (the Perimeter) on the airport's south side, making Hartsfield–Jackson the nation's only civil airport to have a runway above an interstate (although Runway 17R/35L at Stapleton International Airport in Denver, Colorado crossed Interstate 70 until that airport closed in 1995). The massive project, which involved putting fill dirt eleven stories high in some places, destroyed some surrounding neighborhoods and dramatically changed the scenery of
Mamamah International Airport airport development was expected to be followed by the construction of a new State House, parliament building, ministry buildings, court houses and other support facilities. The developments were intended to improve Sierra Leone's competitiveness as the country prepares to become a middle income country by 2035. Other related development projects are the planned bridging of "Tagrin Bay", which separates Freetown from the peninsula on which Lungi International Airport is located, and the ongoing expansion of the port of Freetown. China Railway International Group had been contracted to build the airport at a cost of US$318 million, borrowed from the Exim