Datums for 8770971, Rollover Pass TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8770971, Rollover Pass, TX
Status: Accepted (Sep 26 2019)
Units: Feet
Control Station: 8771013 Eagle Point, Galveston Bay, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.35Mean Higher-High Water
MHW1.25Mean High Water
MTL0.72Mean Tide Level
MSL0.74Mean Sea Level
DTL0.68Mean Diurnal Tide Level
MLW0.19Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.74North American Vertical Datum of 1988
STND-3.20Station Datum
GT1.35Great Diurnal Range
MN1.07Mean Range of Tide
DHQ0.10Mean Diurnal High Water Inequality
DLQ0.18Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide4.42Highest Observed Tide
Max Tide Date & Time08/27/2017 15:48Highest Observed Tide Date & Time
Min Tide-1.31Lowest Observed Tide
Min Tide Date & Time12/21/2018 19:48Lowest Observed Tide Date & Time
HAT1.84Highest Astronomical Tide
HAT Date & Time05/15/1988 14:24HAT Date and Time
LAT-0.97Lowest Astronomical Tide
LAT Date & Time01/28/1987 18:24LAT Date and Time
Tidal Datum Analysis Periods
01/01/2017 - 12/31/2018




Products available at 8770971 Rollover Pass, TX