Ocqueoc River

Smith-Root constructed a weir and a barrier to prevent upstream passage of lamprey.
  • Location: Ocqueoc Township, Michigan
  • Commissioned: 2001
  • Type: Waterway

Project description

Smith-Root designed and constructed this barrier for the U.S. Fish and Wildlife Service to prevent migration of lamprey into upstream spawning habitat.

The small weir is provided with a lip, making lamprey passage difficult. The electric barrier provides additional deterrence.

Four steel rail electrodes are located in slots in the Insulcrete™ deck and side walls. Three pulsators provide the repelling electrical field. The electronics are housed in a small adjacent building.

Services provided

  • Coordination with U.S. Fish and Wildlife Service
  • Structural design of barrier
  • Electrical and electronic design of the pulsators and power supply systems
  • Construction of weir and electrodes
  • Supply of electronics
  • Regular maintenance

Site characteristics

  • Pulsators: 1.5kVA POW
  • Pulsator Qty: 3
  • Power Output: 4.5 kW max.
  • Water Depth: 5 feet max.
  • Waterway Width: 16 feet
  • Water Velocity: 2 ft./s
  • Conductivity: 330 µs/cm max.