Environmental Solutions for Complex Waterway, Wetland, and Remediation Projects
Brennan restores and protects aquatic environments through dredging, sediment remediation, dewatering, water treatment, capping, habitat restoration, and marine construction.
Built for Environmental Work Where Land & Water Meet Est. 1919
Environmental projects require more than construction capability. They require careful planning, precise execution, regulatory awareness, and a deep understanding of how work in one part of an ecosystem can affect everything around it.
Brennan is built for that level of complexity. Our environmental teams support public agencies, engineers, utilities, industrial clients, and private owners with practical solutions for contaminated sites, impaired waterways, wetland systems, shorelines, ports, rivers, lakes, and coastal environments.
With specialized marine equipment, experienced field crews, in-house technical expertise, and a safety-first approach, Brennan helps clients solve difficult environmental challenges while protecting the surrounding ecosystem.
Specialized Services for Remediation, Restoration, and Water-Based Construction Environmental Services
Brennan provides environmental services across the full project lifecycle, from investigation and planning support to construction, treatment, restoration, monitoring, and long-term protection.
Environmental Dredging for Contaminated Sediment & Waterway Restoration Dredging
Brennan delivers environmental dredging services for projects that demand precision, control, and environmental protection. Our crews remove contaminated sediment, restore navigation channels, support habitat improvements, and help clients address legacy impacts in rivers, lakes, harbors, ports, reservoirs, and industrial waterways.
We understand the difference between moving material and managing risk. Every dredging project is planned collaboratively around site conditions, sediment characteristics, water quality requirements, access limitations, disposal needs, and regulatory expectations.
Key Capabilities
- Environmental dredging
- Contaminated sediment removal
- Mechanical and hydraulic dredging
- Navigational dredging
- Sediment handling and transport
- Debris removal
- Dredging in sensitive environments
- Turbidity and water quality controls
- Dredge material management
- Site restoration support
Practical Solutions for Managing Dredged Material Dewatering & Material Separation
Dredged material management is often one of the most important parts of a successful environmental project. We provide dewatering and material separation services that help reduce disposal volumes, improve handling efficiency, and support responsible material management.
We develop site-specific approaches based on the type of material being removed, available space, project schedule, disposal requirements, treatment needs, and end-use goals. From sediment processing to water management, we help clients move from removal to final disposition with greater control.
Key Capabilities
- Sediment dewatering
- Material separation
- Dredged material processing
- Solids handling
- Water management
- Geotextile tube systems
- Mechanical separation
- Containment and staging areas
- Disposal and transport support
- Process optimization
Testing That Helps Projects Move Forward With Confidence Treatability Testing
Treatability testing helps determine how impacted sediment, water, or dredged material will respond to different treatment, separation, dewatering, and disposal strategies. Brennan uses treatability testing to help clients evaluate options before full-scale implementation, reducing uncertainty and improving project planning.
By understanding how site materials behave, project teams can make better decisions about equipment selection, processing methods, water treatment needs, additives, production rates, and disposal pathways.
Key Capabilities
- Sediment and water treatability evaluations
- Bench-scale testing
- Dewatering performance testing
- Material separation testing
- Additive and polymer evaluations
- Water treatment planning support
- Process design support
- Production and handling assessments
- Disposal strategy support
- Full-scale implementation planning
Mobile & Site-Based Water Treatment for Environmental Projects Water Treatment
Environmental dredging, remediation, and dewatering projects often generate water that must be managed carefully before discharge, reuse, or disposal. Brennan provides water treatment services designed around the specific conditions, contaminants, flow rates, and compliance requirements of each project.
Our mobile water treatment capabilities allow Brennan to support projects in remote, temporary, constrained, or changing site conditions. Whether treating contact water, process water, decant water, groundwater, or stormwater, our teams help clients maintain compliance while keeping the project moving.
Key Capabilities
- Industrial Water Treatment
- Mobile water treatment
- Temporary water treatment systems
- Filtration
- Chemical treatment
- Discharge compliance
- System operation and maintenance
Containment & Isolation Solutions for Contaminated Sediment Sediment Capping
Sediment capping is an effective solution for isolating, stabilizing, and containing contaminated sediments. Brennan provides sediment capping services for waterways, ports, harbors, industrial sites, and sensitive aquatic environments where careful placement and long-term performance matter.
We understand the importance of cap design, material selection, placement accuracy, water quality control, and post-construction verification. Whether used as a standalone remedy or part of a larger remediation strategy, Brennan helps clients implement capping solutions with precision.
Key Capabilities
- Sediment capping
- Sand covers
- Reactive caps
- Isolation barriers
- Armoring layers
- Material placement
- Powdered activated carbon capping
- Bathymetric verification
- Long-term remedy support
- Water quality protection
Survey, Imaging, and Underwater Inspection Support for Environmental Projects Hydrographic Survey & Underwater Inspections
Understanding underwater conditions is essential for safe, accurate, and effective environmental work. Brennan provides hydrographic survey and underwater inspection support to help clients assess site conditions, verify progress, document completed work, and make informed decisions throughout a project.
Our survey and inspection capabilities support dredging, capping, restoration, marine construction, dam work, shoreline projects, and environmental remediation. By combining field experience with advanced technology, Brennan helps clients see what is happening below the surface.
Key Capabilities
- Hydrographic survey
- Bathymetric survey
- Underwater inspections
- Acoustic imaging
- Side scan sonar
- Stereo cameras
- ROV inspections
- Diver-assisted inspections
- Pre- and post-construction surveys
- Dredging and capping verification
- Environmental monitoring
Strengthening Shorelines, Wetlands, and Coastal Infrastructure Coastal Resilience
Coastal environments face increasing pressure from erosion, storms, flooding, changing water levels, and aging infrastructure. Brennan supports coastal resilience projects that help protect communities, restore natural systems, and strengthen shoreline and waterfront assets.
We bring marine construction and environmental restoration expertise together to support practical, durable solutions in dynamic coastal and shoreline environments.
Key Capabilities
- Shoreline stabilization
- Living shorelines
- Coastal wetland restoration
- Marsh creation and enhancement
- Erosion control
- Flood protection
- Golden mussel eradication
- Breakwaters and shoreline structures
- Beach and dune restoration
- Habitat improvements
- Marine construction for resilience projects
Restoring Natural Systems With Purpose-Built Environmental Expertise Wetland & Habitat Restoration
Brennan helps restore wetlands, aquatic habitats, shorelines, marshes, and other sensitive natural systems impacted by development, contamination, erosion, invasive species, or changing site conditions. We combine environmental construction knowledge with marine access, specialized equipment, and practical field experience.
From wetland remediation to habitat creation and enhancement, Brennan supports restoration projects that improve ecological function, protect water resources, and support long-term environmental goals.
Key Capabilities
- Wetland restoration
- Habitat restoration
- Marsh restoration
- Shoreline restoration
- Aquatic habitat improvements
- Native planting support
- Invasive species removal
- Golden mussel eradication
- Grading and shaping
- Water control structures
- Environmental monitoring
Construction Support for Complex Environmental Sites Marine & Remedial Construction
Environmental remediation often requires specialized construction in challenging water-based, contaminated, or access-limited environments. Brennan provides marine and remedial construction services that help clients complete cleanup, restoration, containment, access, and infrastructure improvements safely and efficiently.
Our crews are equipped to build and support the structures, systems, and site improvements needed to make environmental projects successful, from temporary access and containment to permanent marine infrastructure and restoration features.
Key Capabilities
- Marine construction for environmental sites
- Remedial construction
- Temporary access systems
- Containment structures
- Cofferdams and isolation areas
- Sheet pile and shoreline structures
- Water control structures
- Site preparation and restoration
- Infrastructure repair and improvement
- Construction support for remediation projects
One Partner for Complex Environmental Work In & Around the Water Why Brennan for Environmental Projects?
Environmental projects are rarely simple. They often involve contaminated materials, sensitive habitats, active waterways, strict permit requirements, limited access, evolving field conditions, and multiple stakeholders.
Brennan brings the integrated team needed to manage that complexity. Our environmental specialists, construction crews, commercial divers, survey teams, treatment operators, and equipment experts work together to projects compliant and moving forward.
What Sets Brennan Apart
- Award-winning safety and environmental performance on safety-critical jobsites
- Transparent project communication from design through closeout
- Turn-key habitat restoration, wetland remediation, dredging, material handling, dewatering, water treatment, capping, and remedial construction under one team
- Customized amphibious equipment for unstable, remote, and sensitive sites
- Union craft professionals trained in complex marine environments
- Proven innovative problem-solving to keep projects moving
Total Quality Management Across the Organization
- ISO 9001 (Quality Management Systems)
- ISO 14001 (Environmental Management)
- ISO 45001 (Occupational Health and Safety Management)
- ASME NQA-1 (2022), 10 CFR 50 Appendix B, and 10 CFR Part 21
What Our Customers Are Saying Client Testimonials
Serving Coastal & Inland Waterways Office Locations
Bring Brennan Into Your Environmental Project
Whether you need support with impacted sediment, environmental dredging, dewatering, water treatment, sediment capping, coastal resilience, habitat restoration, or marine construction, Brennan has the professional people, equipment, and experience to help you move forward with confidence.
Stay Connected With Brennan
Sign up for Brennan’s e-newsletter to receive company news, project updates, announcements, insights, and other information from across our work.