Datums for 8770808, High Island TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8770808, High Island, TX
Status: Accepted (Apr 13 2020)
Units: Feet
Control Station: 8770971 Rollover Pass, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.32Mean Higher-High Water
MHW1.22Mean High Water
MTL0.70Mean Tide Level
MSL0.74Mean Sea Level
DTL0.66Mean Diurnal Tide Level
MLW0.19Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.67North American Vertical Datum of 1988
STND-13.19Station Datum
GT1.33Great Diurnal Range
MN1.03Mean Range of Tide
DHQ0.10Mean Diurnal High Water Inequality
DLQ0.19Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide5.65Highest Observed Tide
Max Tide Date & Time08/30/2017 14:42Highest Observed Tide Date & Time
Min Tide-2.01Lowest Observed Tide
Min Tide Date & Time01/20/2019 18:06Lowest Observed Tide Date & Time
HAT1.67Highest Astronomical Tide
HAT Date & Time12/04/1986 07:48HAT Date and Time
LAT-0.62Lowest Astronomical Tide
LAT Date & Time12/31/1986 19:48LAT Date and Time
Tidal Datum Analysis Periods
01/01/2017 - 12/31/2018




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