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underwater inspections, commercial divers, dock inspections, underwater construction, marine construction, brown water diving, black water diving

Dive Inspections

Our divers are experienced and commercially certified with the knowledge necessary to perform a thorough underwater inspection. They are familiar with marine-based structures as well as underwater construction techniques, and are outfitted with state-of-the-art equipment.

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hydrographic surveys, bathymetric surveys, water based surveys, river surveys

Hydrographic Surveys

Brennan uses the latest multi-beam systems combined with RTK-GPS to model the entire area around marine-based structures.  These detailed models can clearly delineate areas of scour, sediment and debris build-up, and slope conditions.  The data collected is used to build a 3-dimensional model that can be used for visual inspections, as well as scour calculations.

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acoustic imaging, sector scan, underwater acoustic imaging, 365 degree acoustic imaging underwater inspections

Acoustic Imaging

When underwater visibility is limited, or water flows are too high to safely use divers, underwater acoustic imaging, a.k.a. sector scans, can be a helpful tool.  This technology uses acoustics to create an image of the pier or abutment to help detect structural problems and scour issues.  Typically, these images can be combined with above water digital photography or CAD drawings to create a pictorial reference of the entire structure.

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rov inspections, underwater inspections, marine constructions, pipeline inspections, intake inspections, outfall inspections

ROV Surveys & Inspections

Brennan owns remotely operated vessels that can be used to gather information when underwater conditions are unknown or difficult to access.  They are outfitted with HD video cameras and sonar systems to navigate and collect valuable information. 

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side scan sonar, underwater inspections, hydrographic survey, bathymetric survey, acoustic imaging

Side Scan Sonar

Side scan sonar is another great imaging system that can give a detailed view on underlying debris, sediment buildups, and whatever else may be happening underneath the surface of the water.  Gathering information is quick and economic, and often coupled with other imaging services to get a full understanding of the area surrounding the marine-based structure.

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Dive Services Brochure

For more information on our underwater inspection and construction services, download our brochure!


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Careers dive career, inland river diver jobs, marine professional

Interested in a diving career?

We are growing!  Brennan is always looking for hard-working divers with or without past experience.  If you have what it takes to jump in the water, check out our careers page for openings! 

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