On January 19, 1964, KATU moved its transmitter site to Portland's West Hills to improve its signal coverage. Just over a month later, it took over the ABC affiliation in Portland away from KPTV (channel 12) on March 1, 1964. This made KATU the fourth television station in the Portland market in less than a decade to have affiliated with ABC full-time (after KLOR 12, frequency now occupied by KPTV, KGW 8, and KPTV). It is also Portland's longest-lasting ABC affiliate to date.