tidealmanac
No predictions loaded for 1991. This site serves NOAA predictions from its own store, and this period has not been fetched for Kasitsna Bay, Kachemak Bay 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/kasitsna-bay-kachemak-bay-9455517/1991

Kasitsna Bay, Kachemak Bay, AK tide table 1991 (printable) · Tide Almanac