What is it?

Hydrographic Surveying is the process of measuring the depth and mapping the bottom of lakes, rivers, and oceans. Measurements include the tidal, current and wave information of physical oceanography.

Johnson Engineering has the expertise to collect data, process and map X,Y,Z values associated with bodies of water such as lakes, rivers and coastal regions for design, as-built, and dredging information. The final product can be communicated in 3-D modeling, contours, cross-sections or in volume calculations.

How does it work?

Hydrographic Surveying is performed by integrating our standard GPS systems with a survey grade depth recorder to produce an accurate map of underwater features. The Hypack Max software is the link between the GPS and the depth recorder, and provides many tools to aid in the hydrographic survey.

Why do I need this service?

If you’re planning to build a marina, a lake in your development or just need access to channels, the government may require hydrographic maps showing 3-D modeling or contours prior to project approval. The results of Hydrographic Surveying shows marine geological features that pose a hazard to navigation, such as rocks, shoals, reefs and other features that obstruct safe passage. The data produced may be required prior to any engineering design or to obtain the necessary permits.

Why should I choose Johnson Engineering?

Johnson Engineering is the oldest full-service engineering firm in Southwest Florida that offers Hydrographic Surveying. We have the local knowledge and have been surveying Southwest Florida for close to 60 years. We pride ourselves on our availability and quick turnaround time for all projects.

What resources does Johnson Engineering have available?

Hydrographic Surveying equipment is extremely portable, which allows us to easily transfer it between our two vessels. If the project requires shallow depth, we have a 14’ Jon boat for easy access. We use our 19’ Carolina Skiff for larger projects in rivers, lakes and in the Gulf of Mexico. Our hydrographic equipment consists of Trimble 5800 receivers, GPS receivers, an Odem HT 100 survey-grade depth recorder, Hypack Max software and a Panasonic Toughbook laptop computer. Using this equipment, we can produce 3-D modeling, contours, cross-sections and volume calculations, and the data can be manipulated however needed for future reference.

How do I go about obtaining this service?

For more information or to set up an appointment, contact Kevin RisCassi at (239) 334-0046 ext. 2410 or kriscassi@johnsoneng.com or Mark Wentzel at (239) 334-0046 ext. 2440 or mgw@johnsoneng.com.