Tetra Tech’s dams, reservoirs, and levees program combines three of the company’s core strengths—water, infrastructure engineering, and environmental services—to provide drinking water, flood protection, and renewable energy worldwide. Our comprehensive experience, vast technical resources, and financial strength have been proven through more than four decades of service on all aspects of dam, reservoir, and levee projects.

Engineering News Record (ENR) ranks Tetra Tech #1 in Water and Environmental Management and #2 in Dams and Reservoirs. For 18 years in a row, we have held our top ranking in water.

Our work spans the full range of engineering design and related services for wet construction of new dams, dam modification, rehabilitation, and decommissioning, as well as for locks, levees, and hydropower facilities throughout North America and around the world. 


We offer a full suite of multifaceted environmental studies, exploratory drilling and on-site testing, hydrographic surveys, and hydrologic and hydraulic studies to support project planning, permitting, design, and operations.

  • Environmental impact review and permitting
  • Hydrologic and bathymetric surveying
  • Reservoir management and lake restoration
  • Erosion, sedimentation, and geomorphic analysis 
  • Operation and safety studies
  • Inspection, structural evaluation, and certification of dams, levees, and storm protection structures
  • FEMA compliance: emergency action planning, including dam break and flood analyses
  • U.S. and Canadian licensing


We specialize in developing cost-effective, reliable, and sustainable designs that optimize project potential while minimizing environmental impacts. Our design innovation often becomes the blueprint for later projects.

  • Project feasibility studies
  • Conceptual and detailed design of dams and powerhouse structures, fish bypass facilities, pumping stations and flood control gates, and outlet works
  • Reservoirs, canals, levees, navigation structures, and locks 
  • Gate and valve evaluation and design
  • Instrumentation and controls
  • Owner's engineer services

Construction Services

We offer multi-disciplinary expertise and turnkey resources to oversee and manage construction around the world through traditional design-bid-build and alternative delivery methods. Our work covers the range of wet construction and materials, including concrete, earthen, and roller-compacted concrete.

  • Construction plans and permits
  • Procurement support
  • Resident engineering
  • Construction management and quality assurance
  • Materials testing
  • Startup, commissioning, and operator training