Inundation Analysis Tool


8440369 MERRIMACPORT, MERRIMACK RIVER, MA

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 1989-05-22 00:00:00 and 1989-10-20 23:59:00


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 -0.133 -0.44 Mean High Water
DTL -1.167 -3.83 Mean Diurnal Tide Level
MTL -1.207 -3.96 Mean Tide Level
MSL -1.193 -3.91 Mean Sea Level
MLW -2.281 -7.48 Mean Low Water
MLLW -2.334 -7.66 Mean Lower-Low Water
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