departments, which were finally able to leave Dübendorf by the end of April 1949. Further workshops, the striking arched hangar and the "Heating Centre I" for the heat supply were completed by the end of 1949. Based on "Project V", the terminal building had already been designed as a convex building at the airport head in mid-1946. In the following four years, a total of 24 feasible airport project designs were submitted, before the FIG commissioned the construction of the airport according to plans by Alfred and Heinrich Oeschger in November 1950. At the beginning of 1951, the piling work for the terminal building began, the construction work took about two years. With the opening on 9 April 1953, the shanty town could be abandoned. The new building consisted of a central passenger wing, flanked by a restaurant and an office wing. In addition there was a spectator terrace of 200m length. The first years of operation As had been expected the construction costs had been significantly exceeded. Several metres of raised bog were removed and backfilled with material from the Holberg; the concrete area had also increased from the originally planned 420,000 m2 to a good 611,000 m2. In addition, the former weapons range area had to be searched for unexploded bombs, of which a total of 157 were found. The costs for "Project IV", estimated at CHF 59.5 million in 1946, had risen to CHF 106 million by the time the civil engineering works under "Project VII" were completed in July 1949. Both chambers of the Federal Assembly concluded the political review with the "Federal Decree on the Payment of Additional Federal Contributions to the Construction of Zürich-Kloten Airport" of 29 September 1949. The Federation contributed CHF 27.1 million and doubled its contribution to the air traffic control facilities. For its part, the Cantonal Council granted a supplementary credit on 13 February 1950. This was accepted by the voters on 7 May 1950 with 73,551 votes to 59,088 (yes share of 55.45%). The new terminal opened in 1953 with a large air show that ran three days. In 1947, the airport handled 133,638 passengers on 12,766 airline flights; in 1952, 372,832 passengers on 24,728 airline flights. Second stage of construction Locher & Cie was commissioned in 1954 to design various project options for the second construction phase. In March 1956, the canton submitted an extended project to the