Single-beam hydrographic surveys are good for shallow to mid-water depths. Multibeam hydrographic surveys are good for mid to deep-water depths. A multibeam hydrographic survey can serve two purposes: berth clearance and condition surveys.
Does your project require a hydrographic survey? At S.T. Hudson, our hydrographic surveyors use the most sophisticated sonar and inertial GPS available in the industry.
Our in-house survey crews use the latest equipment and technology to perform high resolution hydrographic surveys. We utilize a variety of tools and skills to produce the detailed data you need to make informed decisions.
Our ability to verify data from scanning sonar or multibeam surveys with diver verification is a key tool in the in-house capabilities of S. T. Hudson. In addition, our hydrographic surveyors use real-time kinematic (RTK) positioning to broadcast to survey vessels, achieving centimeter-level vertical and horizontal accuracies. When remote geographic locations make this impossible, we use software to post-process the data to the same tolerances as RTK.
Our certified hydrographers and engineers consult on a variety of dredging related issues, including preparation of specifications, pre- and post-dredging surveys, monitoring of siltation rates, volume calculations for payment quantities, and assistance in obtaining required local, state and federal permits.
Our solid background in underwater construction allows us to deliver cost-effective repairs, prioritize construction, and make reliable estimates so our clients can appropriately allocate and schedule maintenance funding. Our services include:
ST Hudson has shown an exceptionally wide range of capability from environmental studies and permitting to pier design and heavy ship mooring. Each of these efforts has been accomplished with timeliness, thoroughness, and completed within the cost agreed.
Single-beam hydrographic surveys are good for shallow to mid-water depths. Multibeam hydrographic surveys are good for mid to deep-water depths. A multibeam hydrographic survey can serve two purposes: berth clearance and condition surveys.
Single beam surveys are adequate for your required periodic dredge depth soundings. However, for a more complete picture of the topography of the floor of your berthing area, consider using a multibeam survey.
Most dock facilities, both public and private, have requirements for periodic dive inspections to check the underwater condition of your berth structures. The frequency of these inspections can be dictated by the owner of the facility or federal, state, or municipal agencies. In the absence of these requirements, it is advisable to perform dive inspections using certified hard-hat divers once every 1-3 years.
Most dock facilities, both public and private, have requirements for periodic underwater scans to check for obstructions. The frequency of these scans can be dictated by the owner of the facility or federal, state, or municipal agencies. In the absence of these requirements, it is advisable to check the depth of your dock using scanning sonar once every 1-3 years.
Most dock facilities, both public and private, have requirements for periodic hydrographic surveys. The frequency of these scans can be dictated by the owner of the facility or federal, state, or municipal agencies. In the absence of these requirements, it is advisable to check the depth of your dock using single or multibeam scanning sonar once every 1-3 years depending on the silting conditions at your site.