Datums for 9497645, Prudhoe Bay


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9497645, Prudhoe Bay
Status: Superseded (Apr 17 2003) (Accepted Oct 1 1998)
Units: Feet
Control Station:
T.M.: 0
Epoch: SPECIAL
Datum: MLLW
DatumValueDescription
MHHW0.67Mean Higher-High Water
MHW0.57Mean High Water
MTL0.32Mean Tide Level
MSL0.33Mean Sea Level
DTL0.33Mean Diurnal Tide Level
MLW0.07Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-35.82Station Datum
GT0.67Great Diurnal Range
MN0.50Mean Range of Tide
DHQ0.10Mean Diurnal High Water Inequality
DLQ0.07Mean Diurnal Low Water Inequality
HWI9.64Greenwich High Water Interval (in hours)
LWI3.53Greenwich Low Water Interval (in hours)
Max Tide4.82Highest Observed Tide
Max Tide Date & Time08/11/2000 17:24Highest Observed Tide Date & Time
Min Tide-4.01Lowest Observed Tide
Min Tide Date & Time05/12/2021 21:18Lowest Observed Tide Date & Time
HAT1.37Highest Astronomical Tide
HAT Date & Time07/23/2040 21:54HAT Date and Time
LAT-0.56Lowest Astronomical Tide
LAT Date & Time04/01/2025 17:06LAT Date and Time
Tidal Datum Analysis Periods
01/01/1995 - 12/31/1997




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