Built in 1939 on land dredged from the harbour, it has two runways which can accommodate the smaller planes of regional scheduled airlines and general aviation aircraft. The 1983 agreement prohibits jet airplanes except in emergencies. In 2007, the number of landings and take-offs at the airport was 90,199. Because of its location near downtown and its tall buildings, industrial smokestacks and a wind turbine, air traffic into and out of the airport is controlled with approaches and departures routed over the lake. A seaplane base is located just east of the main apron. The airport is also used for medical flights.