Datums for 9452081, Port Snettisham, Speel River Arm AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9452081, Port Snettisham, Speel River Arm, AK
Status: Accepted (Jan 16 2025)
Units: Feet
Control Station: 9452210 Juneau, AK
T.M.: 135
Epoch: 2012-2016
Datum: MLLW
DatumValueDescription
MHHW15.18Mean Higher-High Water
MHW14.22Mean High Water
MTL7.76Mean Tide Level
MSL7.75Mean Sea Level
DTL7.59Mean Diurnal Tide Level
MLW1.30Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD882.50North American Vertical Datum of 1988
STND-14.68Station Datum
GT15.19Great Diurnal Range
MN12.93Mean Range of Tide
DHQ0.96Mean Diurnal High Water Inequality
DLQ1.30Mean Diurnal Low Water Inequality
HWI9.77Greenwich High Water Interval (in hours)
LWI3.66Greenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HAT19.32Highest Astronomical Tide
HAT Date & Time11/15/2016 22:06HAT Date and Time
LAT-4.52Lowest Astronomical Tide
LAT Date & Time05/27/2021 16:36LAT Date and Time
Tidal Datum Analysis Periods
05/01/2024 - 07/31/2024




Products available at 9452081 Port Snettisham, Speel River Arm, AK