• Culvert is sized adequately to allow sufficient water flow but also movement of wildlife.
  • Culvert is located at the correct stream bed depth. This is to avoid vertical steps, ensure continuous flow and retain connectivity for aquatic animals.
  • Including natural substrate in the culvert provides:
    • a habitat
    • different water velocities and,
    • encourages aquatic animals to pass under the road.
  • Allows for access roads or other linear infrastructure while maintaining connectivity. Span bridges and other solutions can also be considered. Specific species may have specific design requirements.