email HTI home
Hydroacoustic Technology, Inc.
  Hydroacoustic Technology, Inc.    
Featured Case Study  
Boundary Dam Hydroacoustic Sampling Illuminates Fish Passage
at Hydroelectric Dam

Project Location: Boundary Dam
Client: Seattle City Light
Project Lead: Patrick Nealson


Along the banks of the Pend Oreille River, about 100 miles north of Spokane sits Boundary Dam, one of Washington's most dependable sources for clean, renewable energy. Its six turbines provide up to half of Seattle's total power requirements. The Boundary Hydroelectric Project operates on a Federal Energy Regulatory Commission license that would expire in 2011. Seattle City Light contracted with Tetra Tech, Inc. and HTI to conduct fish entrainment and habitat connectivity studies in support of its relicensing application.

One goal of these recently completed studies was to estimate the number, size, species and timing of fish that may be entrained through the dam's turbine intakes and spillways. To describe fish passage through the powerhouse and spillways, Seattle City Light employed turbine netting, in conjunction with two HTI Model 244 Multi-Frequency Digital Split-Beam Echo Sounders.

The split-beam systems provided high temporal and spatial sampling coverage at each potential fish passage route, quantifying fish entrainment 24 hours a day, 365 days per year, over a 2 year period. The study results were used to estimate fish passage at the powerhouse and spillway under different operating regimes on an hourly, daily, diel and seasonal basis. Fish direction-of-movement, size, velocity, vertical approach distributions and other parameters are also summarized from the hydroacoustic data.

“Boundary Dam is a challenging site”, explained Peter Barton, fish and aquatics study coordinator for Boundary's relicensing team. HTI is proud to work with Seattle City Light at the Boundary Hydroelectric Project.

Pole-mounted Transducer
Fish Detection
Installing the transducers on the face of the powerhouse.
I can't say enough about HTI's customer-oriented project team. They were thorough, professinoal, and always will go to the extra mile. Peter Barton, Seattle City Light
More Case Studies

Monitoring Commercial Aquaculture Net-Pens with Acoustic Tags for Real-Time, Fine-Scale 3D Tracking

Investigating Passage: Behavioural Studies of Upstream Moving Salmonids

Detecting Fish Presence Using Acoustic Tags at Electrical Barriers

Hands-On Mobile Surveys Using Hydroacoustic Echo Sounders, Seattle-Style

Collaborative Efforts: Developing a Marine Acoustic Tag Tracking System for Fine-Scale Behavioral Research

Tracking Fine-Scale Movement of Dock Shrimp Kelp Crab in the San Juan Archipelago with Marine Bioacoustics Workshop Students

Tracking Alligator Gar at Steinhart Aquarium

Investigating Downstream Passage of American Eel

Monitoring Movement of Multi-Species Assemblages with Acoustic Telemetry at the Seattle Aquarium

Monitoring Fish in Noisy Tailraces of Hydroelectric Dams, Três Marias Brazil

 > See More Case Studies
Helpful Links
Newsletter UpdateIndustry NewsAdditional ResourcesRequest More Info

© Hydroacoustic Technology, Inc. All Rights Reserved.