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Datums for 9459450, Sand Point AK


Elevations on Station Datum

Station: 9459450, Sand Point, AK
Status: Accepted (Sep 30 2011)
Units: Feet
T.M.: 135
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW37.75Mean Higher-High Water
MHW37.04Mean High Water
MTL34.44Mean Tide Level
MSL34.39Mean Sea Level
DTL34.13Mean Diurnal Tide Level
MLW31.85Mean Low Water
MLLW30.51Mean Lower-Low Water
NAVD88
STND0.00Station Datum
GT7.23Great Diurnal Range
MN5.19Mean Range of Tide
DHQ0.71Mean Diurnal High Water Inequality
DLQ1.33Mean Diurnal Low Water Inequality
HWI11.22Greenwich High Water Interval (in hours)
LWI4.94Greenwich Low Water Interval (in hours)
Maximum42.10Highest Observed Water Level
Max Date & Time12/31/1986 22:30Highest Observed Water Level Date and Time
Minimum26.70Lowest Observed Water Level
Min Date & Time12/13/2008 05:24Lowest Observed Water Level Date and Time
HAT40.03Highest Astronomical Tide
HAT Date & Time12/31/1986 22:42HAT Date and Time
LAT27.60Lowest Astronomical Tide
LAT Date & Time06/22/1986 17:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 9459450 Sand Point, AK

Revised: 10/15/2013
NOAA / National Ocean Service
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