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NOTE: Surveys shown are the most recent available. For information regarding previous surveys, contact the Navigation Section.

 Hydrographic surveys are in Bentley Microstation V8i DGN format. Click on the self extracting ZIP file below and save to your hard drive. Open the survey in your CADD Software Product or Bentley (Free) View software. See Bentley website to obtain free viewer.

 XYZ Data – ASCII (space delimited) bathymetry sounding data, sorted for minimum depths for printing within a scale dependant plot for data represented within CAD file.

 Hydrographic Surveys, Survey Results / Channel Condition Reports are in PDF format.

Meta Data text file image Metadata file.

New Hampshire Projects

The Corps has completed 10 navigation projects in New Hampshire that have improved rivers, harbors, and lakes used by commercial interests, fishermen, and the many recreational boaters that benefit from New Hampshire's coastal and inland waterways. Initial work on some of the projects dates back to the 19th century. However, most of the navigational work in today's rivers and harbors has been constructed by the Corps within the past 50 years, costing an aggregate $6.65 million. Below are the Corps' navigation projects in New Hampshire.
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Publication Date Project Title / Description PDF Drawings Survey Results DGN File XYZ File Metadata File
8/7/2013 
 Condition Survey
Complet Project Drawing
Meta Data text file image
Publication Date: 4/10/2008
Project Map:  
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PDF Drawings:  
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Results of Survey:  
Publication Date: 2/18/2011
Project Map:  
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XYZ File:  
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Publication Date: 8/31/2009
Project Map:  
DGN File:  
XYZ File:  
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Publication Date: 4/12/2013
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Publication Date: 6/1/1967
Project Map:  
PDF Drawings:  
Publication Date: N/A
Project Map:  
Publication Date: 3/5/2004
Project Map:  
DGN File:  
XYZ File:  
PDF Drawings:  
Meta Data File:  
Results of Survey:  
Publication Date Project Title / Description PDF Drawings Survey Results DGN File XYZ File Metadata File
11/26/2013
Condition Survey
Complet Project Drawing
Meta Data text file image
Publication Date Project Title / Description PDF Drawings Survey Results DGN File XYZ File Metadata File
4/9/2007 
 Condition Survey
 Complete Project Drawing
Meta Data text file image
 3/27/2013 After Dredge / Condition Survey 
 Supplemental Drawing
Meta Data text file image
8/7/2013 Back Channel / Sagamore Creek  Condition Survey
 Complete (Sub-Project) Drawing
Meta Data text file image
Publication Date: 2/16/2012
Project Map:  
DGN File:  
XYZ File:  
PDF Drawings:  
Meta Data File:  
Results of Survey: