Datums for 8638495, Richmond River Locks, James River VA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8638495, Richmond River Locks, James River, VA
Status: Accepted (Jan 11 2011)
Units: Feet
Control Station: 8638610 Sewells Point, VA
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.68Mean Higher-High Water
MHW3.46Mean High Water
MTL1.80Mean Tide Level
MSL1.92Mean Sea Level
DTL1.84Mean Diurnal Tide Level
MLW0.15Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND0.81Station Datum
GT3.68Great Diurnal Range
MN3.32Mean Range of Tide
DHQ0.22Mean Diurnal High Water Inequality
DLQ0.15Mean Diurnal Low Water Inequality
HWI8.96Greenwich High Water Interval (in hours)
LWI3.65Greenwich Low Water Interval (in hours)
Max Tide17.74Highest Observed Tide
Max Tide Date & Time01/27/2010 22:54Highest Observed Tide Date & Time
Min Tide-1.85Lowest Observed Tide
Min Tide Date & Time12/05/2007 00:24Lowest Observed Tide Date & Time
HAT4.39Highest Astronomical Tide
HAT Date & Time11/12/1985 20:54HAT Date and Time
LAT-0.38Lowest Astronomical Tide
LAT Date & Time03/10/1997 04:18LAT Date and Time
Tidal Datum Analysis Periods
12/01/2007 - 11/30/2009




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