Datums for 8440466, NEWBURYPORT, MERRIMACK RIVER MA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8440466, NEWBURYPORT, MERRIMACK RIVER, MA
Status: Accepted (Aug 7 2003)
Units: Feet
Control Station: 8418150 Portland, ME
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW8.76Mean Higher-High Water
MHW8.32Mean High Water
MTL4.28Mean Tide Level
MSL4.27Mean Sea Level
DTL4.38Mean Diurnal Tide Level
MLW0.23Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-4.85Station Datum
GT8.76Great Diurnal Range
MN8.09Mean Range of Tide
DHQ0.44Mean Diurnal High Water Inequality
DLQ0.24Mean Diurnal Low Water Inequality
HWI4.10Greenwich High Water Interval (in hours)
LWI10.64Greenwich Low Water Interval (in hours)
Max Tide10.79Highest Observed Tide
Max Tide Date & Time05/24/1990 23:18Highest Observed Tide Date & Time
Min Tide-1.49Lowest Observed Tide
Min Tide Date & Time12/12/1989 17:42Lowest 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
06/01/1989 - 05/31/1990




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