Datums for 8440369, MERRIMACPORT, MERRIMACK RIVER MA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8440369, MERRIMACPORT, MERRIMACK RIVER, MA
Status: Accepted (Sep 22 2003)
Units: Feet
Control Station: 8440466 NEWBURYPORT, MERRIMACK RIVER, MA
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW7.66Mean Higher-High Water
MHW7.22Mean High Water
MTL3.70Mean Tide Level
MSL3.74Mean Sea Level
DTL3.83Mean Diurnal Tide Level
MLW0.17Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-0.47Station Datum
GT7.66Great Diurnal Range
MN7.05Mean Range of Tide
DHQ0.44Mean Diurnal High Water Inequality
DLQ0.17Mean Diurnal Low Water Inequality
HWI5.01Greenwich High Water Interval (in hours)
LWI11.88Greenwich 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
09/01/1989 - 09/30/1989




Products available at 8440369 MERRIMACPORT, MERRIMACK RIVER, MA