Dredging Surveys

Why do You Need a Dredging Survey?

Dredging is the process of excavating in fresh water or shallow seas with the purpose of gathering up sediments from the bottom surface and disposing of them elsewhere. To keep waterways clear for navigation, this procedure can be carried out as part of a regular maintenance schedule.  Over time, materials such as silt and sand wash downstream and gradually fill harbours and channels. This natural process is known as sedimentation and can impede on safe navigation of the waterbody.


Any dredging work should involve:

  • A pre-dredge survey
  • A post-dredge survey
  • Some volume computations 

These surveys need to be undertaken by a certified hydrographic surveyor to ensure that the data is valid and accurate to the highest industry standards. 


Pre and Post Dredging Surveys

  • The price of a high quality pre- and post- dredging survey is negligible in comparison to the cost of a budget blowing out due to insufficient planning
  • The savings of both time and money that can be generated by one of our quality surveys will far outweigh the initial costs
  • Pre- and Post- dredging surveys are a specialist job, and one that should only be undertaken by certified professionals using specialist hydrographic equipment

Pre and Post Dredging Surveys Provide:

  • A starting point from which to base all calculations
  • An accurate estimation of material to be removed to achieve design depth
  • Information that is invaluable for budgeting, tender documentation and permit applications
  • An accurate computation of the volume of material removed during the dredging campaign
  • Progress surveys can also be undertaken during the dredging campaign to ensure the project is running to schedule
Dredging Surveyor

Total Hydrographic’s advanced systems can furnish your dredging contractor with all the survey details they need to get the job done efficiently. Speak to us about creating a 3D channel design to plan your dredge.

Total Hydrographic’s pre and post dredging surveys are conducted exclusively by professionally recognised Level 1 and Level 2 Certified Hydrographic Surveyors, assessed by the Australasian Hydrographic Surveyors Certification Panel (AHSCP) through the Surveying & Spatial Sciences Institute. 

Our staff have tertiary qualifications and experience in Hydrographic Surveying, Geomatic Engineering, Marine Mapping and GIS, Cartography and National Maritime Operations.

A list of certified professionals in hydrographic surveying can be found here.

Enlist an experienced and fully qualified hydrographic survey company for your dredging project and save on overall project costs.

We Have the Qualifications - Call us!