Coastal Engineering Services

ATM assists clients with complex environmental and development issues along coastal, inland waterway, and lakefront shorelines. Whether developing innovative dredged material management solutions, assessing the hydraulics and hydrodynamics of water bodies and inlets (including marina flushing and water quality studies), designing the nourishment of depleted beaches, or planning and permitting waterfront developments, ATM provides strategic assistance and an integrated approach assuring project success. Our experts guide clients in overcoming regulatory hurdles and avoiding costly pitfalls from initial planning and engineering through implementation and post-project performance monitoring.

Coastal Analysis, Site Evaluation, & Modeling

Coastal projects are affected by wind, waves, tides, and sediment transport. ATM uses numerical and physical modeling to optimize project designs and help mitigate potential environmental impacts. Our services include:

• Extreme Storm Hazard Estimation (Wind, Waves, and Flooding)
• Marina Circulation and Flushing
• Wave Generation and Transformation
• Beach, Dune, and Nearshore Morphological Processes
• Shoreline Evolution and Impact Assessments
• 2-D and 3-D Estuary and Coastal Hydrodynamics
• Cohesive Sediment Transport and Sedimentation
• Water Quality and Oil Spill Movement
• Coastal Structures and Shore Protection Designs
• Harbor Wave Agitation and Long Period Waves
• Vessel Motions and Mooring System Dynamics
• Ship Navigation Simulations

Beach Nourishment Feasibility, Design, & Permitting

An industry leader in the field of beach nourishment, ATM’s comprehensive services that support community beach programs include:

• Feasibility and Economic Studies
• Storm Impact, Erosion Analysis, and Project Design
• State, Federal, and International Permitting
• Geotechnical Investigation and Analysis
• Borrow Source Identification
• FEMA Projects and Cost Reimbursement Support
• Construction Administration
• Post-Construction Monitoring
• Numerical Modeling

Shoreline Stabilization & Coastal Structures

ATM provides clients with the full range of solutions using technologies suitable to address erosion and stabilize shorelines. We assist clients with:

• Seawalls, Revetments, Articulated Mats, and Geotextile Applications (Slope Stabilization and Dune Reinforcement)
• Breakwaters, Jetties, and Groins
• Bulkheads and Wharves
• Marina Dock and Pier Design (Floating and Fixed)
• Wave Attenuation Systems
• Pipeline, Cable Protection, and Armoring
• Stormwater Outfalls

Wave and Shoreline Modeling

ATM specializes in coastal wave modeling and shoreline studies. ATM utilizes the most advanced and widely accepted models, including STWAVE, CMS-Wave, CMSFlow, SWAN, CGWAVE, BOUSS-2D, MIKE23, and GENESIS. ATM applies wave models to successfully engineer borrow area design, jetty and breakwater design, inlet channel design and optimization, and shoreline stabilization design.

ATM has the numerical model capability and expertise to assess marinas for operational and storm conditions. Furthermore, ATM has assessed and identified seiching periods (wave agitation) for marina basins. ATM also has performed numerous shoreline studies to facilitate beach nourishment designs, inlet effects, and shoreline stabilization structures (groins, T-head groins, and breakwaters).

• Wind-Wave Growth
• Storm Wave Impacts
• Borrow Area Impacts
• Surfing Reef Waves
• Marina Agitation
• Shoreline Modeling
• Sediment Transport Studies
• Shoreline Stabilization Structures
• Beach Renourishment

Inlet and Channel Management

Inlet systems are often dynamic, with actively moving shoals, channel migration, and in some cases stability and closure issues. These inlet systems are often a barrier to sand transport, which can result in shoreline and navigation problems. Solutions to inlet-related issues require a comprehensive understanding of the coastal processes contributing to these dynamics. ATM has the knowledge necessary to provide tailored, cost-effective solutions to our clients’ inlet management concerns.

ATM provides U.S. and international clients with pragmatic solutions to a variety of inlet concerns using a variety of approaches, including:

• Wave/Current Modeling
• Sediment Budget Analyses
• Sedimentation Modeling
• Inlet Management Plans
• Sediment Bypassing
• Shoaling Analyses
• Inlet Stabilization
• Beneficial Use of Dredge Material
• New Inlet Cuts
• Inlet Relocation
• Navigation Studies
• User-Demand Studies
• Cost-Benefit Analyses

Dredging Design Services

Dredging is a critical aspect of many coastal and waterfront development projects. ATM’s experience in current dredging technology and practices can provide our clients:

• Dredging Feasibility and Cost Studies
• Maintenance Dredging Evaluations and Support
• Development and Permitting of Confined Disposal Facilities
• Identification, Evaluation, Design, and Permitting of Upland and Offshore Dredge Disposal Sites
• State, Federal, and International Permitting
• Determination of Beneficial Uses for Dredged Materials

Habitat Restoration & Enhancement

From dunes to mangroves to corals and seagrass, ATM`s staff of engineers and scientists work to restore and enhance environmental habitats. Services provided include:

• Site Assessment and Opportunity Analysis
• Project Mitigation Design and Implementation
• Coral and Seagrass Relocation
• Artificial and Mitigation Reef Design
• Marsh and Mangrove Enhancement

Environmental Permitting and Negotiation

ATM professionals understand the complex process of project permitting. We have extensive experience in coastal engineering projects that require consultation and approval on local, state, federal, and international levels, including:

• Comprehensive State, Federal, and International Permitting Support
• JCP, ERP, and CCCL Permits
• NEPA Permitting Support
• Agency Coordination and Negotiation

ATM provides a variety of specialized services to developers, architects, land planners, and other consultants and government entities in the planning, design and construction of resort, residential, commercial, and recreational projects. Our primary mission is to assist our clients in understanding the infrastructure elements of their projects, and resolve their environmental and engineering issues through innovative design.

Our coastal engineering services for resort development and planning include:

• Coastal Erosion Assessments
• Beach Restoration and Shoreline Protection
• Dredging Projects
• Integrated Services for Marinas and Coastal Infrastructure
• Wave and Sediment Transport Modeling

Surveys and Environmental Assessments

ATM’s extensive land and hydrographic surveying services use advanced technology and in-house equipment in conducting nearshore hydrographic and upland area surveys. Our services include:

• Upland Topographic
• Beach Profile
• Bathymetric
• Side-Scan Sonar
• Seismic
• Magnetometer
• Environmental Impact Assessments (EA, EIS, and EIAs)
• Environmental Resource Surveys, Mitigation Strategies, and Habitat Creation Plans
• Threatened and Endangered Species Evaluations
• Wetland Delineation and Design of Wetland Mitigation Areas
• Environmental Due Diligence
• Construction Oversight and Due Diligence
• Geotechnical Investigations