Datums for 8771165, Goat Island


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8771165, Goat Island
Status: Accepted (Jul 30 2020)
Units: Feet
Control Station: 8771013 Eagle Point, Galveston Bay, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.16Mean Higher-High Water
MHW1.08Mean High Water
MTL0.58Mean Tide Level
MSL0.66Mean Sea Level
DTL0.58Mean Diurnal Tide Level
MLW0.07Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.42North American Vertical Datum of 1988
STND-28.17Station Datum
GT1.16Great Diurnal Range
MN1.01Mean Range of Tide
DHQ0.08Mean Diurnal High Water Inequality
DLQ0.07Mean 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
HAT1.92Highest Astronomical Tide
HAT Date & Time10/12/2025 09:12HAT Date and Time
LAT-1.21Lowest Astronomical Tide
LAT Date & Time01/10/2005 17:48LAT Date and Time
Tidal Datum Analysis Periods
12/01/2019 - 02/29/2020




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