Datums for 9490286, Riley Channel, AK AK


NOTICE: All data values are relative to the STND.

Elevations on Station Datum

Station: 9490286, Riley Channel, AK, AK
Status: Accepted (May 29 2025)
Units: Feet
Control Station: 9491094 Red Dog Dock, AK
T.M.: 0
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHWMean Higher-High Water
MHWMean High Water
MTLMean Tide Level
MSL29.35Mean Sea Level
DTLMean Diurnal Tide Level
MLWMean Low Water
MLLWMean Lower-Low Water
NAVD8825.19North American Vertical Datum of 1988
STND0.00Station Datum
GTGreat Diurnal Range
MNMean Range of Tide
DHQMean Diurnal High Water Inequality
DLQMean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
07/01/2024 - 09/30/2024




Products available at 9490286 Riley Channel, AK, AK