Only one more section remains to be inserted - and that is to take place at the "topping out," now due for Oct. 28 - before the two legs of the Gateway Arch are joined. The next to last section, above, was put into place Tuesday, leaving a space of only two and a half feet between the legs of the 630-foot Arch. The legs appear to be joined in the picture below, taken after the next to last section was inserted, but that's due to the camera angle.