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Datums for 9438125, Multnomah Channel


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9438125, Multnomah Channel
Status: Accepted (Apr 1 2005)
Units: Feet
Control Station: 9439201 St Helens, OR
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.16Mean Higher-High Water
MHW2.62Mean High Water
MTL1.43Mean Tide Level
MSL1.41Mean Sea Level
DTL1.58Mean Diurnal Tide Level
MLW0.23Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-1.89Station Datum
GT3.15Great Diurnal Range
MN2.39Mean Range of Tide
DHQ0.54Mean Diurnal High Water Inequality
DLQ0.23Mean Diurnal Low Water Inequality
HWI0.55Greenwich High Water Interval (in hours)
LWI8.22Greenwich 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
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
11/01/2003 - 11/30/2003




Products available at 9438125 Multnomah Channel,

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services