Datums for 8770931, SMITH POINT, GALVESTON BAY


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8770931, SMITH POINT, GALVESTON BAY
Status: Accepted (Jul 16 2021)
Units: Feet
Control Station: 8771013 Eagle Point, Galveston Bay, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.27Mean Higher-High Water
MHW1.20Mean High Water
MTL0.65Mean Tide Level
MSL0.69Mean Sea Level
DTL0.64Mean Diurnal Tide Level
MLW0.10Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.12North American Vertical Datum of 1988
STND-28.85Station Datum
GT1.27Great Diurnal Range
MN1.10Mean Range of Tide
DHQ0.07Mean Diurnal High Water Inequality
DLQ0.10Mean 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
HAT2.06Highest Astronomical Tide
HAT Date & Time10/12/2025 10:06HAT Date and Time
LAT-1.29Lowest Astronomical Tide
LAT Date & Time01/10/2005 19:18LAT Date and Time
Tidal Datum Analysis Periods
12/01/2019 - 05/31/2020




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