We specialize in high-quality marine construction services above and below the waterline to support the nation’s waterways and critical infrastructure. Our certified commercial divers perform complex underwater inspections and construction that help owners and operators ensure safety, reliability, and compliance. From aging spillway assessments to intake structure inspections, we provide actionable insights and trusted construction solutions.
Brennan divers are ADCI-certified, fit to dive, and trained through the United Brotherhood of Carpenters (UBC). Combined with post-dive-school training from the UBC and advanced training in Brennan’s own dive tank, our divers are the best in the industry.
Diver Safety and Compliance
Our dive operations comply with US Coast Guard, Occupational Safety and Health Administration (OSHA), federal and state regulations, ADCI, IMCA, and EM 385-1-1 standards. We are also prequalified with ISNetworld, Avetta, and Veriforce.
We hold our company and divers to the highest safety and quality standards.
- Minimum 3-person crew for surface-supplied diving
- Minimum 4-person crew in Canada, confined spaces, or in the presence of differential head pressure
- Required First Aid, CPR, O2 Administration, HAZWOPER, OSHA Construction Safety & Health certifications
- All dive supervisors must pass the ADCI Supervisor exam
- Our Nuclear Quality Assurance program (NQA) is approved to perform safety-related work in accordance with ASME NQA-1 (2022), 10 CFR 50 Appendix B, and 10 CFR Part 21
- Stringent equipment standards
Dive and Underwater Construction Areas of Expertise
Our divers are experts in inspecting and working on all water-based infrastructure, including energy and regulatory assets, intake and outfall systems, dams, bridges, nuclear facilities, and operating underwater technology, while producing high-quality deliverables.
Water-Based Infrastructure
- Dams
- Bridges
- Barges and shipping terminals
- Piers
- Industrial docks and other critical facilities
Energy & Regulatory Assets
- Nuclear facilities, coating application, reactor components, and cooling pond dredging
- Hydros and FERC Part 12 inspections
- Mines
- Oil, gas, and petrochemical facilities
- Safety-critical environments
Intake & Outfall Systems
- Pump stations
- Cooling systems
- Traveling water screens
- Valves and seals
- Pipelines and discharge structures
Specialized Services
- Submarine cabling touchdowns
- Ship husbandry
- Recovery of historical artifacts
- Extreme hazmat diving
- Fish protection
- Diver-assisted dredging
- Maritime security barriers
Advanced Technology
- Detailed underwater inspections and recordings
- Underwater imaging
- Surveying
- Remotely operated vessels (ROVs)
- High-quality deliverables
Professional, High-Quality Deliverables
Our reports and underwater inspections are meticulously crafted, designed to communicate findings clearly, identify risks, and inform long-term decision-making. Every deliverable reflects our commitment to accuracy, transparency, and safety.
- Clear written results tailored to each project
- High-quality underwater photos and video/audio recordings
- CAD drawings identifying inspected features
- Optional acoustic images for added detail
- Straightforward recommendations for repairs or maintenance
