Datums for 8420411, DOVER, COCHECO RIVER NH


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8420411, DOVER, COCHECO RIVER, NH
Status: Superseded (Apr 17 2003) (Accepted Mar 1 1999)
Units: Feet
Control Station: 8418150 Portland, ME
T.M.: 75
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW7.67Mean Higher-High Water
MHW7.29Mean High Water
MTL3.78Mean Tide Level
MSL3.91Mean Sea Level
DTL3.84Mean Diurnal Tide Level
MLW0.26Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-6.23Station Datum
GT7.67Great Diurnal Range
MN7.03Mean Range of Tide
DHQ0.37Mean Diurnal High Water Inequality
DLQ0.26Mean Diurnal Low Water Inequality
HWI5.34Greenwich High Water Interval (in hours)
LWI11.41Greenwich 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
HAT9.01Highest Astronomical Tide
HAT Date & Time11/27/2034 18:12HAT Date and Time
LAT-1.21Lowest Astronomical Tide
LAT Date & Time11/17/2016 00:54LAT Date and Time
Tidal Datum Analysis Periods
07/01/1998 - 08/31/1998




Products available at 8420411 DOVER, COCHECO RIVER, NH