Datums for 8440889, RIVERSIDE, MERRIMACK RIVER


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8440889, RIVERSIDE, MERRIMACK RIVER
Status: Accepted (Sep 8 2003)
Units: Feet
Control Station: 8440466 NEWBURYPORT, MERRIMACK RIVER, MA
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW6.30Mean Higher-High Water
MHW5.84Mean High Water
MTL2.98Mean Tide Level
MSL2.78Mean Sea Level
DTL3.15Mean Diurnal Tide Level
MLW0.12Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.38North American Vertical Datum of 1988
STND-3.50Station Datum
GT6.30Great Diurnal Range
MN5.72Mean Range of Tide
DHQ0.46Mean Diurnal High Water Inequality
DLQ0.12Mean Diurnal Low Water Inequality
HWI5.52Greenwich High Water Interval (in hours)
LWI0.84Greenwich 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
HAT7.25Highest Astronomical Tide
HAT Date & Time06/08/2035 07:18HAT Date and Time
LAT-0.92Lowest Astronomical Tide
LAT Date & Time01/16/2036 02:48LAT Date and Time
Tidal Datum Analysis Periods
07/01/1989 - 09/30/1989




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