 The remaining stretch of US 410 was moved to an expressway connecting with the new Pioneer Memorial Bridge, which opened on July 30, 1954.The southern section of the Richland bypass, terminating near Hanford, was designated as Secondary State Highway 3R (SSH 3R) in 1953 and extended west via modern SR 224 to Kiona two years later.Shortly after the Atomic Energy Commission approved preliminary plans for a state highway across part of the Hanford Nuclear Reservation in 1959, the state legislature designated it as Secondary State Highway 11C (SSH 11C) and allocated gas tax funds to construct it, despite opposition from Yakima legislators.