Coastal & Marine Stuctures
Resolute Engineering to weather the extremes
Coastal and Marine Structures are incorporated in many of our waterfront development and erosion control solutions where steadfast performance is required. For long-term success, critical structures need to be carefully engineered, accounting for all relevant coastal processes and extreme episodic forces. We also strive to create designs that are cost-effective, environmentally sustainable, and aesthetic.
From concept through installation, Lally LLC prototypes, engineers and oversees construction of marine structures for a range of high- and low-energy sites. We have experience with breakwaters and revetments, piers, floating docks, jetties, and other types of floating and bottom-founded structures.
The types of Coastal and Marine Structures we design and construct include;
- Offshore Detached Breakwaters
- Entrance Channel Jetties
- Quarrystone Armor Erosion Control Systems
- Concrete Block Armor Units (e.g. Dolos, Tetrapod, XBloc)
- Seawalls and Quay Walls
- Articulated Concrete Mat
- Rock and Concrete Bulkheads
- Fixed Piers and Floating Docks
- Scour Protection
- Dredged Material Disposal Facilities
- Levees, Dikes and Bunds
- Water Control Structures
- Subaqueous Berms and Sills
- Sand Filled-Geotextile Tubes
- Porta-Dams
- Cellular Cofferdams
- Wave Attenuators
Nature-based Engineering, incorporating habitat-conducive components and geometries into marine structure design to promote properly functioning natural processes, ecosystem repair and recreational benefits, is a specialty area of Lally’s for over three decades. Also known as Bioengineering, Building with Nature®, or Engineering with Nature®, we have wide-ranging experience with green-gray and pure green solutions, and find creative ways to incorporate these concepts across an expanding range of coastal infrastructure projects, including;
- Living Shoreline Revetments
- Nature-based Groin Fields TM
- Riparian Wave Buffer TM
- Riverbank Protection
- Fish Spawning Benches
- Artificial Reefs
Successful development, installation and operation of marine infrastructure, for the long-term, requires a significant amount of preparation. Lally LLC offers practical on-water knowledge and advanced academic training to create projects that benefit the owner, society and the environment. Specific planning-level services we offer include;
- Site Selection Studies
- Site Physical Conditions Assessments
- Environmental Conditions Assessments
- Market and Economic Assessments
- Master Planning and Structure Planning
- MetOcean Data Acquisition and Analysis
- Coastal Geomorphology Studies
- Vessel Traffic Analyses
- Dye Studies
- Seismic Analysis
- Quarrystone and Filter Material Sourcing
- Topographic & Bathymetric Surveys
- Aerial and LIDAR Surveys
- Subsurface Investigations
- Geotechnical Sampling and Analysis
- Stakeholder Engagement
Lally LLC professional engineering staff assist our clients with the design of coastal and marine structures from concept through final detailed design. We apply accepted international guidelines, in-house and 3rd party numerical models, and practical knowledge on a range of coastal and offshore structures.
Engineering-phase experience Lally LLC offers to the coastal and marine infrastructure sector includes;
- Conceptual Design
- Alternatives Development
- Design Visualizations and 3D Models
- Topographic, Nearshore & Bathymetric Surveys
- Geotechnical Sampling and Testing
- Waves and Coastal Processes Analyses
- Detailed Engineering Design
- Slope Stability Analysis
- Beach Nourishment Integration
- Littoral Transitions
- Nature-based Engineering
- Climate Change Adaptation
- Design and Analysis of Mooring Systems
- Inland Infrastructure Relocation
- Demolition Plans
- Contract Plans and Specifications
- Project Management
To help solve the complex technical challenges associated with siting, installing and maintaining coastal structures in dynamic marine environments, Lally LLC employs advanced 1D, 2D and 3D numerical modeling tools such as DELFT3D and other in-house models to simulate design-induced responses under varying hydrodynamic conditions. In doing so, a range of structure alignments, slopes, and components can be synthetically and efficiently evaluated to determine optimal structure design parameters.
Navigating the regulatory process to acquire and comply with environmental permits can be one of the more challenging components of coastal construction. Lally LLC has successfully acquired federal, state and municipal permits for our clients’ projects through comprehensive understanding of site environmental conditions and stakeholder requirements, and innovative designs to optimize performance while enhancing environment conditions.
Responsive communications with regulators and stakeholders, global experience with nature-based solutions, and contractor knowledge working in varied marine environments, have also served to facilitate successful permit acquisition and compliance for our clients.
Lally LLC has experience working with the following agencies in the acquisition and administration of project permits in the coastal environment.
- U.S. Army Corps of Engineers (USACE)
- Bureau of Ocean Energy Management (BOEM), formerly U.S. Minerals Management Service (USMMS)
- NOAA – National Marine Fisheries Services (NMFS)
- U.S. Fish and Wildlife Service (USFWS)
- CARICOM Ministries of the Environment
- State and Local Environmental Agencies
- Coastal Protection and Restoration Authorities
- County and City Shoreline Master Programs
- Tribes and First Nations
Examples of Lally LLC permitting and environmental compliance experience provided to the coastal and marine structure sector include;
- Initial Scoping
- Baseline Studies
- Permit Applications and Drawings
- Section 10/404 Rivers and Harbor Act and Clean Water Act
- Section 401 Water Quality Certification
- Section 7 Endangered Species Act
- Biological Evaluations / EIA
- Nationwide and Regional General Permits
- Agency Negotiations and Communications
- Stakeholder Engagement and Communications
- Water Quality Monitoring
- Sediment Monitoring
- Fish and Habitat Monitoring
- Marine Mammal Monitoring
- Seine Surveys and Fish Counts
- Sound Monitoring
- Spill Prevention, Control and Countermeasure Plans
- Pre-, Progress- and Post-Fill Surveys
- Post-Construction Monitoring
- Project Reporting
As former employees of North American and European marine contractors, Lally LLC has operational experience with the terrestrial and marine equipment and construction approaches used to install coastal structures. We can efficiently collaborate on important coastal and offshore infrastructure projects as Owner’s representative, project manager, or 3rd party advisor to manage risks, achieve optimal performance and resolve project technical and contractual challenges.
Specific Construction – phase experience we offer the coastal and marine infrastructure sector includes;
- Procurement Support
- Early Contractor Involvement
- Pre-Bid Meetings
- Project Startup
- Site Supervision
- Construction Oversight
- Environmental Monitoring
- Quality Assurance / Quality Control
- Pre-, Progress and Post-Placement Surveys
- Post-Construction Monitoring and Reporting
- Payment Requests / Contract Management
- Claims Resolution / Expert Services
