 The former would cause operational problems during winter for 50-passenger aircraft, while the longer alternative would allow for operation of 70-seat turboprops, such as the Dash 8-Q400 and the ATR 72.Avinor estimated in 2012 the costs of a new airport with a short runway to NOK 1.6 billion and of a longer runway to NOK 2.2 billion.Avinor's calculations give a negative net present value for society of between NOK 1.2 and 1.4 billion.