Datums for 8772471, Freeport SPIP, Freeport Harbor TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8772471, Freeport SPIP, Freeport Harbor, TX
Status: Accepted (Jun 9 2020)
Units: Feet
Control Station: 8772447 Freeport, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.80Mean Higher-High Water
MHW1.66Mean High Water
MTL0.95Mean Tide Level
MSL0.98Mean Sea Level
DTL0.90Mean Diurnal Tide Level
MLW0.25Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.82North American Vertical Datum of 1988
STND-27.48Station Datum
GT1.80Great Diurnal Range
MN1.42Mean Range of Tide
DHQ0.14Mean Diurnal High Water Inequality
DLQ0.25Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide4.42Highest Observed Tide
Max Tide Date & Time08/25/2017 22:00Highest Observed Tide Date & Time
Min Tide-2.45Lowest Observed Tide
Min Tide Date & Time12/21/2018 13:42Lowest Observed Tide Date & Time
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
07/01/2016 - 06/30/2017




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