Datums for 8771486, Galveston Railroad Bridge TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8771486, Galveston Railroad Bridge, TX
Status: Accepted (Mar 23 2020)
Units: Feet
Control Station: 8771450 Galveston Pier 21, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.27Mean Higher-High Water
MHW1.19Mean High Water
MTL0.70Mean Tide Level
MSL0.75Mean Sea Level
DTL0.63Mean Diurnal Tide Level
MLW0.21Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.35North American Vertical Datum of 1988
STND-19.45Station Datum
GT1.27Great Diurnal Range
MN0.99Mean Range of Tide
DHQ0.08Mean Diurnal High Water Inequality
DLQ0.20Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide4.98Highest Observed Tide
Max Tide Date & Time09/21/2020 11:48Highest Observed Tide Date & Time
Min Tide-2.69Lowest Observed Tide
Min Tide Date & Time12/21/2018 15:18Lowest Observed Tide Date & Time
HAT1.62Highest Astronomical Tide
HAT Date & Time06/22/1986 13:30HAT Date and Time
LAT-0.78Lowest Astronomical Tide
LAT Date & Time12/31/1986 16:24LAT Date and Time
Tidal Datum Analysis Periods
10/01/2013 - 09/30/2014
05/01/2016 - 04/30/2018




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