The first jetways were added to gates 1 and 3 by American in 1977. As part of the 1978 expansion, new lounge space was built for Allegheny Airlines (successor to Mohawk) with three jetways. In about 1986 the airline (by then renamed USAir) added a fourth jetway. The 1980 expansion included two new lounge areas for United, each of which had one jetway. In 1987, Piedmont Airlines, which had taken over the United lounge closest to the terminal, added a second jetway to it. In about 1985, USAir built an expansion to the end of the main concourse to house a USAir Club.