Gain complete clarity below the surface for your project. At Brennan, we combine cutting‑edge technology with expert field teams to deliver detailed, reliable insight into underwater conditions. Whether it’s for safety, maintenance, permitting, or design, our inspection and survey services help you make informed decisions. With 100+ ADCI-certified divers on staff, we conduct a thorough assessment of your structure, identify areas of interest, and produce a detailed report that can be used for further analysis.

Areas of Survey & Inspection Expertise

  • Multibeam and single beam bathymetric surveys
  • Side-scan sonar
  • Underwater acoustic imaging
  • Dive inspections
  • Photogrammetry
  • Remotely operated vehicles (ROVs)
  • Licensed drone pilots
  • Unmanned aerial vehicles (UAVs)

What We Offer

  • Dive Inspections
    Our certified commercial divers bring years of experience inspecting underwater infrastructure—dams, bridge piers, bulkheads, marine structures, and more. We conduct thorough visual and tactile inspections, document findings with video, photos, and CAD drawings, and provide recommendations for repairs, scour mitigation, or structural maintenance.
  • Hydrographic / Bathymetric Surveying
    Obtain accurate, high‑resolution maps of underwater terrain. Using multi‑beam echo sounders, RTK‑GPS, and specialist survey vessels (or boom truck setups in challenging or high‑flow areas), our hydrographers chart bottom contours, sediment build‑up, scour holes, and slope conditions. Final deliverables include 3D models, georeferenced datasets, and full‑color visualizations for analysis and design.
  • Acoustic Imaging & Sonar Systems
    When visibility is poor or diving isn’t safe, we deploy acoustic imaging tools—such as sector scans and side‑scan sonar—to “see” the unseen. These tools reveal damage or obstructions on submerged surfaces, detect scour and erosion, and track sediment or debris accumulation. We often combine acoustic data with hydrographic models and surface photography to build comprehensive structural profiles.
  • ROV Surveys
    For difficult‐to‑access areas, deep water, confined spaces, or high‑risk environments, our remotely operated vehicles (ROVs) equipped with HD video and sonar sensors can deliver the data you need without exposing personnel to danger. Great for continuous monitoring or in situations where divers are unsuitable.

Why This Matters

  • Prevent & Detect Risks Early
    Early discovery of scour, cracks, debris, or structural damage can prevent costly failures or emergency repairs. Our surveys give you the ability to proactively manage structural integrity.
  • Support Design, Permitting & Regulatory Compliance
    Whether for FERC dam safety requirements, bridge inspection standards, or environmental permits, our work supplies the precise data agencies and engineers require.
  • Data You Can Trust
    We deliver full documentation: from high‑resolution imagery to georeferenced data sets and 3‑D models. Our experts interpret that data for you, helping you visualize conditions under water just as clearly as on land.

Let’s Get Started

Need deeper insight into your underwater structures? Reach out to our specialists to schedule a consultation or request sample deliverables. Let Brennan help you unlock the full picture—above and below the waterline.