 In 1966, the Port Authority extended the northern end of Runway 4 (or 22) by and the western end of Runway 13 (or 31) by by constructing a , pile-supported concrete deck over parts of Flushing Bay, including the Rikers Island Channel.In the 1990s, about of Flushing Bay were filled in to create an overrun at the eastern end of Runway 13 (or 31).To offset the loss of wetlands, new wetlands were constructed adjacent to the airport in Flushing Bay and in Little Neck Bay.