Datums for 8771722, Jamaica Beach


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8771722, Jamaica Beach
Status: Accepted (Jul 23 2020)
Units: Feet
Control Station: 8771486 Galveston Railroad Bridge, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW0.96Mean Higher-High Water
MHW0.93Mean High Water
MTL0.50Mean Tide Level
MSL0.49Mean Sea Level
DTL0.48Mean Diurnal Tide Level
MLW0.06Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88-0.10North American Vertical Datum of 1988
STND-27.55Station Datum
GT0.96Great Diurnal Range
MN0.87Mean Range of Tide
DHQ0.02Mean 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
HAT1.46Highest Astronomical Tide
HAT Date & Time10/12/2025 10:00HAT Date and Time
LAT-0.91Lowest Astronomical Tide
LAT Date & Time01/21/2023 18:48LAT Date and Time
Tidal Datum Analysis Periods
12/01/2019 - 02/29/2020




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