Skip navigation
Tribal Energy and Environmental Information Clearinghouse
Tribal Energy and Environmental Information Clearinghouse: Environmental resources for tribal energy development
Energy Resources Assessments & Monitoring Laws & Regulations
Energy Resources Assessments & Monitoring Laws & Regulations |  Home  |  News  |  FAQ  |  Glossary
Document Library
Federal and Tribal Contacts

Water Resources Mitigation Measures

Mitigation measures to avoid or reduce water resource impacts from hydrokinetic energy development.

The following are examples of mitigation measures that could be applied to reduce water resource impacts of a project depending upon site- and project-specific conditions. Impacts to water resources are related to the project activities (e.g., seabed and land disturbance, erosion, changes in runoff patterns), and project emissions (e.g., sediment runoff and water releases). Many impacts can be reduced or avoided when considered during the siting and design phase.

Develop a final set of mitigation measures for any project in consultation with the appropriate tribal, federal, and state resource management agencies and with stakeholders. Conduct these consultations as part of the project development process and preferably prior to final project siting and design.

Siting and Design Mitigation Measures

Siting and design considerations that mitigate impacts include:

  • Develop a contingency plan to prevent potential groundwater and surface water contamination.
  • Develop a stormwater management plan to ensure compliance with regulations and prevent off-site migration of contaminated stormwater or increased soil erosion.
  • Minimize the planned amount of land to be disturbed as much as possible by using existing roads, borrow pits, and quarries.
  • Construct drainage ditches only where necessary. Use appropriate structures at culvert outlets to prevent erosion.

General Mitigation Measures

General mitigation practices and principles that could apply to any or all phases of a hydrokinetic energy project include:

  • Maintain vessels to minimize release of fuel or other chemicals to the ocean or river.
  • Clean and maintain catch basins, drainage ditches, and culverts.
  • Refuel in a designated fueling area that includes a temporary berm to limit the spread of any spill.
  • Limit herbicide/pesticide use to nonpersistent, immobile herbicides/pesticides.
  • Use drip pans during refueling to contain accidental releases and under fuel pump and valve mechanisms of any bulk fueling vehicles parked at the project site.

Project Phase-Specific Mitigation Measures

Mitigation measures specific to a particular phase of a hydrokinetic energy project include:


  • Save topsoil removed during construction and use to reclaim disturbed areas upon completion of construction activities whenever possible.
  • Avoid creating excessive slopes during excavation and blasting operations.
  • Monitor construction near aquifer recharge areas to reduce potential contamination of the aquifer.
  • Dispose of excess excavation materials in approved areas to control erosion and minimize leaching of hazardous materials.

Decommissioning/Site Reclamation

  • Develop and implement a decommissioning plan that includes the removal of all aboveground facilities and underwater facilities, including intake structures and dams at a barrage facility.
  • Reestablish the original grade and drainage pattern to the extent practicable.