Inundation Analysis Tool


8440889 RIVERSIDE, MERRIMACK RIVER

Please see the data inventory to find a period with hourly or six-minute data available.
Data Inventory

Note that this is a historical station and data may be available between 1989-05-25 00:00:00.0 and 1989-10-24 23:59:00.0


Select a reference elevation and specify a date range for analysis.

You may select from an accepted tidal datum or specify a different elevation.
Most elevations on land are given relative to a geodetic datum such as NAVD88

All analysis results are presently provided in meters relative to the requested threshold.

Meters relative to MHHWFeet relative to MHHWDatum
MHHW 0.0 0.0 Mean Higher-High Water
MHW -0.141 -0.46 Mean High Water
DTL -0.961 -3.15 Mean Diurnal Tide Level
MTL -1.013 -3.32 Mean Tide Level
MSL -1.074 -3.52 Mean Sea Level
MLW -1.884 -6.18 Mean Low Water
MLLW -1.921 -6.3 Mean Lower-Low Water
NAVD88 -1.501 -4.92 North American Vertical Datum
User Specified Elevation         in       relative to   


Note: Data query is limited to a 10 year maximum and 1 month minimum date range when requesting an analysis of 6-minute data


6-minute Height and High Water Analysis
Hourly Height and High Water Analysis
Hourly Height Analysis