Datums for 8772391, Old Brazos River Freeport


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8772391, Old Brazos River Freeport
Status: Accepted (Dec 22 2020)
Units: Feet
Control Station: 8772471 Freeport Harbor, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.87Mean Higher-High Water
MHW1.75Mean High Water
MTL1.00Mean Tide Level
MSL1.02Mean Sea Level
DTL0.93Mean Diurnal Tide Level
MLW0.24Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.37North American Vertical Datum of 1988
STND-23.81Station Datum
GT1.88Great Diurnal Range
MN1.52Mean Range of Tide
DHQ0.12Mean Diurnal High Water Inequality
DLQ0.24Mean 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
HAT2.70Highest Astronomical Tide
HAT Date & Time10/29/2007 00:48HAT Date and Time
LAT-1.22Lowest Astronomical Tide
LAT Date & Time01/21/2023 14:24LAT Date and Time
Tidal Datum Analysis Periods
01/01/2020 - 05/31/2020




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