Sample Plans

The Bureau of Bridge Design has assembled Bridge Sample Plans and Bridge Plan Checklists that can be used as an aide in the preparation of detail construction plans for bridges.

The Sample Plans and Checklists are intended to be used only as a general guide for sheet layout, or reminder, to the designer, checker, and reviewer, and are not intended to be a replacement for the user’s own professional judgment based on sound engineering principles. It is the responsibility of the designer to provide the details that will allow the Contractor to construct the project as intended.

The New Hampshire Department of Transportation (NHDOT) makes these documents available on an "as-is" basis. Details and items of the sample plans may have changed. It is the responsibility of the designer to provide the most current details and items on the contract plans. For up-to-date details, go to Bridge Details page.

Please note that some of the files listed below are large and may take several minutes to download depending on your Internet connection.

Additional Bridge Info

All the .dgn files have been converted from MicroStation V8i to the newer version, MicroStation Connect.  The MicroStation Connect files listed below are designated with "MSC". 

Bridge Plan Checklists

Sample Project Notes

  • Revision History Document
  • pdf
  • 5/8/2024
  • Sample Project Notes
  • pdf | dgn (MSC)
  • 5/8/2024

Expansion Joints

  • Finger Expansion Joint (Andover 20650)
  • pdf
  • 5/2024
  • Finger Joint Phase Construction (Bethlehem Carroll 42501)
  • pdf
  • 9/2020 (rev 12/30/20)
  • Finger Joint (Roxbury-Sullivan 10439)
  • pdf
  • 8/2017 (rev 5/9/19)
  • Finger Joint Phase Construction (Concord 40405)
  • pdf
  • 3/2016 (rev 5/9/19)
  • Modular Joint (Newington-Dover 11238L)
  • pdf
  • 4/2010
  • Modular Joint (Hooksett 28435)
  • pdf
  • 9/2014
  • Strip Seal Phase Construction (Bethlehem-Carroll 42501)
  • pdf
  • 9/2020 (rev 12/30/20)
  • Compression Seal Phase Construction (Amherst 41413)
  • pdf
  • 9/2020 
  • Compression Seal Phase Construction (Bethlehem-Carroll 42501)
  • pdf
  • 9/2020 (rev 12/30/20)
  • Plow Protection Plate Phase Construction Rehab (Warner 40512)
  • pdf
  • 5/2018
  • Plow Protection Plate Phase Construction Rehab (Lebanon 15580)
  • pdf
  • 8/2017
  • Median Barrier Details (At Expansion Joint) (Lebanon-Hartford 16148)
  • pdf
  • 9/2019

Sign Structure

  • Full Span Sign Structure Footing Plan  
  • pdf | dgn (MSC)
  • 7/31/2023
  • Cantilever Sign Structure Footing Plan
  • pdf | dgn (MSC)
  • 7/31/2023
  • Sign Structure Stick Figure
  • pdf | dgn (MSC)
  • 7/31/2023

Preliminary Bridge Plans

  • Alstead 14541J    
  • pdf
  • 10/2006

Steel Girder Bridge Plans

  • Stewartstown 16312    
  • pdf
  • 8/2016

Bridge and Approach Steel Railing Layout Plan

  • Amherst 41413    
  • pdf
  • 8/2021

Bridge Rehabilitation Plans

  • Bethlehem-Carroll 42501    
  • pdf
  • 9/2020 (rev 12/30/20)
  • Boscawen 42440    
  • pdf    
  • 11/2019

Bridge Preservation Plans

  • Sutton-New London 40511
  • pdf
  • 9/24/21
  • Bartlett-Jackson 41989
  • pdf    
  • 11/25/21
  • Littleton 43444
  • pdf
  • 6/8/22
  • Marlborough 44054
  • pdf    
  • 8/7/23

Soundwall Sample Plans (Concrete)

  • Portsmouth 43760 (with door)
  • pdf
  • 4/2024
  • Nash-Merr-Bed 13761E
  • pdf
  • 2/2023

Soundwall Sample Plans (Timber Walls - Not Current)

  • Bridge Mounted (Salem 13933D)
  • pdf
  • 9/2010
  • Concrete Barrier Mounted (Manchester 10622-B)
  • pdf
  • 8/2004
  • MSE Wall Mounted (Dover 11238-L)
  • pdf
  • 2/2010
  • MSE Wall Mounted (Salem 13933D)
  • pdf
  • 5/2010