Tetra Tech provides a full range of innovative structural and non-structural resilient infrastructure solutions to preserve and protect coastal communities around the world.

Tetra Tech’s expertise in coastal market sectors dates to the company’s founding as a coastal engineering firm in 1966. Our services for coastal infrastructure projects include environmental consulting, vulnerability and risk assessments, coastal and ocean engineering, and adjacent waterfront development. Tetra Tech’s comprehensive experience, vast technical resources, and financial strength have been proven over more than 50 years of service on all aspects of waterfront and coastal projects.

Our work spans marine, estuarine, riverine, and wetland environments worldwide. Tetra Tech is working in coastal zones around the globe. Tetra Tech’s coastal resilient infrastructure services includes:

  • Structural solutions including surge barriers, seawalls, bulkheads, tide gates, breakwater systems, and shoreline armoring
  • Non-structural solutions including living shoreline design and implementation, beach and dune nourishment, and sustainable marsh and wetland creation
  • Low head inflatable dams to control salinity intrusion
  • Sea level rise, hurricane assessment, and subsidence evaluations
  • Climate vulnerability and risk assessment and adaptation, flood mapping, and policy and planning

Our Coastal Resilient Infrastructure Work

Inner Harbor Navigation Canal (IHNC) Lake Borgne Surge Barrier, Louisiana

Tetra Tech provided innovative design for the largest civil works design-build project in the U.S. Army Corps of Engineers’ history for the surge barrier extending from the Mississippi River Gulf Outlet to the Gulf Intracoastal Waterway. The American Council of Engineering Companies (ACEC) recognized the project with the 2012 Grand Conceptor Award. The American Society of Civil Engineers (ASCE) selected it for the 2014 Outstanding Civil Engineering Achievement Award.

Elliott Bay Seawall Replacement Project, Seattle, Washington

Tetra Tech completed the conceptual design, alternatives analysis, and 35 percent level design for the seawall replacement to support alternative visions and opportunities for redeveloping the central waterfront area.

Fort Pierce City Marina Reconstruction and Expansion, Florida

Our team designed and provided construction management for a 15-acre island breakwater system to provide wave and current protection for the hurricane impacted marina. ASCE’s Coasts, Oceans, Ports, and Rivers Institute (COPRI) recognized Tetra Tech’s work on the Florida’s Fort Pierce City Marina as the 2016 Top Large Project of the Year. The National Association of Environment Professionals recognized the project with a 2017 National Environmental Excellence Award.

Living Shoreline Demonstration Project, Louisiana

Tetra Tech designed 21 miles of shoreline protection using living shoreline products to attenuate wave energy, serving as a first line of defense for coastal marshes in the project area.

Calcasieu Ship Channel (CSC) Salinity Control Measures Project, Louisiana

Our team developed conceptual and final designs for this project that manages the introduction of high-salinity water from the CSC to adjacent water bodies to reduce the rate of wetland loss in the 630,000-acre Calcasieu-Sabine Basin.