No predictions loaded for 2017. This site serves NOAA predictions from its own store, and this period has not been fetched for Port Deposit 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/md/port-deposit-8574008/2017
Port Deposit, MD tide table 2017 (printable) · Tide Almanac