Datums for 8761724, Grand Isle LA


NOTICE: This stations datums are computed using the 5-year Modified Procedure

Elevations on Mean Lower Low Water

Station: 8761724, Grand Isle, LA
Status: Superseded (Apr 17 2003) (Accepted Sep 24 1999)
Units: Feet
Control Station:
T.M.: 0
Epoch: SPECIAL
Datum: MLLW
DatumValueDescription
MHHW1.11Mean Higher-High Water
MHW1.08Mean High Water
MTL0.56Mean Tide Level
MSL0.56Mean Sea Level
DTL0.56Mean Diurnal Tide Level
MLW0.02Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-5.76Station Datum
GT1.11Great Diurnal Range
MN1.06Mean Range of Tide
DHQ0.03Mean Diurnal High Water Inequality
DLQ0.02Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide6.26Highest Observed Tide
Max Tide Date & Time08/29/2021 22:54Highest Observed Tide Date & Time
Min Tide-2.76Lowest Observed Tide
Min Tide Date & Time01/13/1964 00:00Lowest Observed Tide Date & Time
HAT1.83Highest Astronomical Tide
HAT Date & Time10/12/2025 06:36HAT Date and Time
LAT-0.94Lowest Astronomical Tide
LAT Date & Time01/10/2005 14:06LAT Date and Time
Tidal Datum Analysis Periods
01/01/1990 - 12/31/1994




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