Oral Presentation International Conference on River Connectivity (Fish Passage 2018)

River Connectivity: Addressing the exclusion, collection or guidance of fish, debris, algae, and water temperature at dams and power plants in order to provide enhanced river connectivity. (#149)

Andy Peters 1
  1. Pacific Netting Products, Kingston, WA, United States


We will review the engineering, technology, and methodology, research, and lessons learned of structures and systems (usually placed in the forebay) that are used to

  1. a) guild fish or debris to a particular point
  2. b) exclude fish from moving through a dam or into a cooling water intake,
  3. c) segregate reservoir waters to modify water temperatures or exclude water with higher blue-green algae concentrations (Microcystis aeruginosa, Aphanizomenon flosaquae, and chlorophyll-a) from moving downstream of a dam or structure.

 The discussion will include a) examples research by Toby Kock (USGS) in comparison efficiency of fish passage structures at facilities including Puget Sound Energy (Baker Lake), Tacoma Power (Cushman Dam), Pacific Corp’s (Swift Dam) and PGE (North Fork Clackamas and Round Butte). b) examples of downstream exclusion to prevent invasive species (Colorado Elkhead Lake) or preserve valuable species at Ameren UE (Bagnell Dam) and c) discussion of materials and methods to control water temperature and algae blooms at PacifiCorp’s Iron Gate dam. ,.


This talk should lead to knowledge exchange and discussion on the advancement of materials and technology that are critical to fish passage solutions and the implications for operations, maintenance, and community affected by those decisions.

It should inform and instigate discussions between researchers, educators, practitioners, biologist, engineers, and regulators from around the world on unique approaches to develop and implement cost-effective, environmentally sound, and robust methods to collect, protect or restore migratory fishes and aquatic species; prevent impingement and entrainment of threatened or endangered species, and address migration of invasive species of fish.