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Datums for 9415623, NAPA, NAPA RIVER CA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9415623, NAPA, NAPA RIVER, CA
Status: Accepted (Jun 12 2003)
Units: Feet
Control Station: 9414290 San Francisco, CA
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW6.86Mean Higher-High Water
MHW6.38Mean High Water
MTL3.70Mean Tide Level
MSL3.82Mean Sea Level
DTL3.42Mean Diurnal Tide Level
MLW1.03Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.25North American Vertical Datum of 1988
STND-6.30Station Datum
GT6.86Great Diurnal Range
MN5.35Mean Range of Tide
DHQ0.48Mean Diurnal High Water Inequality
DLQ1.03Mean Diurnal Low Water Inequality
HWI9.61Greenwich High Water Interval (in hours)
LWI3.47Greenwich 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
03/01/1979 - 06/30/1979
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 9415623 NAPA, NAPA RIVER, CA

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