Datums for 9454124, Sheep Bay AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9454124, Sheep Bay, AK
Status: Accepted (May 21 2025)
Units: Feet
Control Station: 9454240 Valdez, AK
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW12.17Mean Higher-High Water
MHW11.25Mean High Water
MTL6.38Mean Tide Level
MSL6.51Mean Sea Level
DTL6.09Mean Diurnal Tide Level
MLW1.51Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.92North American Vertical Datum of 1988
STND-19.39Station Datum
GT12.16Great Diurnal Range
MN9.74Mean Range of Tide
DHQ0.92Mean Diurnal High Water Inequality
DLQ1.51Mean Diurnal Low Water Inequality
HWI9.99Greenwich High Water Interval (in hours)
LWI3.69Greenwich 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
HAT15.81Highest Astronomical Tide
HAT Date & Time11/24/2003 21:48HAT Date and Time
LAT-3.80Lowest Astronomical Tide
LAT Date & Time05/27/2021 16:42LAT Date and Time
Tidal Datum Analysis Periods
06/01/2024 - 09/30/2024




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