No predictions loaded for 2060. This site serves NOAA predictions from its own store, and this period has not been fetched for Ketchikan yet. Nothing is estimated or interpolated in its place. NOAA's own page for the station has the official table: tidesandcurrents.noaa.gov.
tidealmanac.site/us/ak/ketchikan-9450460/2060
Ketchikan, AK tide table 2060 (printable) · Tide Almanac