Datums for 8735180, Dauphin Island AL


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8735180, Dauphin Island, AL
Status: Accepted (Nov 18 2020)
Units: Feet
Control Station: 8729840 Pensacola, FL
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.22Mean Higher-High Water
MHW1.20Mean High Water
MTL0.61Mean Tide Level
MSL0.57Mean Sea Level
DTL0.61Mean Diurnal Tide Level
MLW0.02Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.52North American Vertical Datum of 1988
STND-2.87Station Datum
GT1.22Great Diurnal Range
MN1.18Mean Range of Tide
DHQ0.02Mean Diurnal High Water Inequality
DLQ0.01Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide7.15Highest Observed Tide
Max Tide Date & Time09/16/2004 04:06Highest Observed Tide Date & Time
Min Tide-2.07Lowest Observed Tide
Min Tide Date & Time01/19/1977 06:00Lowest Observed Tide Date & Time
HAT2.04Highest Astronomical Tide
HAT Date & Time10/18/1989 05:24HAT Date and Time
LAT-1.04Lowest Astronomical Tide
LAT Date & Time01/18/1988 14:54LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/1997
10/01/2001 - 09/30/2003
02/01/2005 - 01/31/2012
09/01/2013 - 08/31/2018




Products available at 8735180 Dauphin Island, AL