Tetra Tech offers unparalleled experience and understanding of the requirements for executing large-scale projects in coastal and offshore environments involving interactions among federal, state, and local governing agencies. Tetra Tech’s offshore energy team has supported the development of more than 50 offshore facilities across North America, including deepwater ports, oil and gas platforms, subsea pipelines, submarine transmission and fiber optic cables, and renewable energy projects including wind, wave, and hydrokinetic projects. We are supporting the development of more than 3,000 megawatts (MW) of offshore wind generation in 10 jurisdictions along the Atlantic, Gulf, and Pacific coasts and in the Great Lakes.

Tetra Tech brings both international and domestic experience to offer a full range of planning, engineering, environmental, and regulatory support services to our offshore energy clients. Our depth of resources and broad geographic coverage ensures industry-wide competence with local delivery. 

As a leader in renewable energy development in the United States, Tetra Tech offers a vast range of in-house technical expertise. We also partner with niche firms to provide our clients with a comprehensive and innovative approach to analyze the feasibility and environmental impacts of offshore energy development. With our long history of working in the complex marine environment and an integrated team of experts, Tetra Tech can provide realistic estimates of the level of complexity and the effort required to cost-effectively, efficiently achieve our clients’ goals.

Tetra Tech offers the following services for the development, construction, and operational phases of offshore energy projects.

Site Selection Support

  • Critical issues (fatal flaw) analysis and desktop studies
  • Constraints mapping
  • Facility siting and selection
  • Alternative site identification
  • Operational modeling
  • Hydrodynamics

Resource Surveys, Assessments, and Plans

  • Oceanographic, hydrographic, geophysical, and shallow geotechnical surveys and assessments
  • Wave and tidal analysis
  • Coastal, marine biological, and ecological resource studies
  • Avian and bat resource studies
  • Sediment analyses
  • Threatened and endangered species assessments and surveys
  • Cultural resource analysis
  • Socioeconomic, ocean use, and recreational use assessments
  • Visual impact assessments and simulations
  • In-air and underwater noise analyses
  • Biological and ecological resource mitigation and monitoring plans
  • Public and stakeholder outreach strategies
  • Navigational safety studies
  • Spill prevention, containment, and countermeasure plans
  • Dredge disposal planning and design
  • Ecological and human health risk assessments
  • Environmental monitoring of marine mammals, sea turtles, plankton, marine benthos, and fish
  • UXO desktop and survey assessments

Licensing and Permitting

  • Federal, state, and local permit application preparation
  • Permit strategy development
  • Agency consultation and negotiations
  • National Environmental Policy Act (NEPA) compliance
  • Federal Energy Regulatory Commission (FERC) filings
  • Third-party environmental impact statements
  • Construction and operation implementation
  • Public outreach support

 Design and Engineering

  • Coastal planning and engineering
  • Facility planning and engineering
  • Port planning
  • Submarine cable planning and engineering

 Construction and Operation

  • Sediment management
  • Environmental training
  • Environmental resource monitoring
  • Marine mammal and sea turtle Protected Species Observer (PSO) and training services


  • Tetra Tech has helped develop several first-of-their-kind offshore energy projects including Deepwater Wind Block Island Wind Farm, the Virginia Offshore Wind Technology Advancement Project (VOWTAP), and the Excelerate Energy Northeast Gateway Deepwater Port
  • We have more than three decades of experience with the FERC, including supporting alternative and traditional licensing processes, providing input to FERC third-party support services, and conducting all aspects of agency and stakeholder consultation
  • Tetra Tech has experience coordinating and conducting complex offshore survey programs in state and federal waters of the United States, including those designed specifically to meet recent Bureau of Ocean Energy Management (BOEM) guidelines
  • Our staff is experienced with permitting of marine hydrokinetic (MHK) projects including resolution of commercial fishing conflicts and the rational development of safety zones for the protection of other waterway users and project assets