from a central building, the terminal was the largest in the country and could handle over six million travelers a year; the first year, nine and a half million people passed through. In March 1962, the longest runway (9/27, now 8R) was ; runway3 was and runway 15 was long. In 1971, the airport was named William B. Hartsfield Atlanta Airport after former Atlanta mayor William B. Hartsfield who died that year. The name change took effect on February 28, which would have been Hartsfield's 81st birthday. Later that year, in recognition of the growth of the airport's international service, the name was changed to William B. Hartsfield Atlanta International Airport. Midfield Terminal (1980–present) Construction began on the present midfield terminal in January 1977 under the administration of Mayor Maynard Jackson. It was the largest construction project in the South, costing $500 million. The complex was designed by Stevens & Wilkinson, Smith Hinchman & Grylls, and Minority Airport Architects & Planners. The new terminal, initially consisting of Concourses A through D and the northern half of the present-day Concourse T (which served as the International Terminal), opened on September 21, 1980, on time and under budget. It was designed to accommodate up to 55 million passengers per year and covered 2.5 million square feet (230,000 m2). In December 1984, a fourth parallel runway was completed, and another runway was extended to the following year. In 1999, Hartsfield–Jackson's leadership established the Development Program: "Focus On the Future," involving multiple construction projects to prepare the airport to handle a projected demand of 121 million passengers in 2015. The program was originally budgeted at $5.4 billion over ten years, but the total is now revised to over $9 billion. In May 2001, construction of an over fifth runway (10–28) began. It was completed at the 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 currently active 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 Flat Rock Cemetery and Hart Cemetery, both on the airport property. It was added to help ease traffic